СПИСОК патентов США - подгруппа МПК16 H04L27/34


Выделить слова в названиях патентов:


№ п/п Номер патента Название патента

2017

19602980Techniques for hierarchical encoding for multicast broadcast services in wireless communication systems
29602326Apparatus and method for transmitting signal, apparatus and method for receiving signal
39602325Transmitter and method of transmitting
49602324Telecommunication signaling using nonlinear functions
59602319Apparatus, method, and computer readable medium for high-efficiency wireless local-area network (HEW) signal field detection
69596112Method for communication via three orthogonal waveforms
79591598Method of generating code sequence and method of transmitting signal using the same
89590836System and method for digital sideband mitigation: advanced modulation in a narrow bandwidth RF channel
99590835256 quadrature amplitude modulation user equipment category handling
109590834Radio communication apparatus capable of switching modulation schemes
119590833Reception of 2-subcarriers coherent orthogonal frequency division multiplexed signals
129590831Method for communication via three pseudo-orthogonal waveforms
139590760Analog RF memory system
149584196Transmission apparatus and method, and reception apparatus and method
159584176Embedded meta-carrier with spread spectrum via overlaid carriers
169584169High frequency transmitter
179584154System and method for digital signaling
189577865Carrier recovery aided by pilot symbols carrying information
199577864Method and apparatus for use with received electromagnetic signal at a frequency not known exactly in advance
209577861Broadcast signal transmission apparatus, broadcast signal reception apparatus, broadcast signal transmission method, and broadcast signal reception method
219577761Controlling an optical transmitter that supports multiple modulation formats and baud rates
229577678Bit interleaver for low-density parity check codeword having length of 64800 and code rate of 7/15 and quadrature phase shift keying, and bit interleaving method using same
239577638Digital signal up-converting apparatus and related digital signal up-converting method
249574441Downhole telemetry signal modulation using pressure pulses of multiple pulse heights
259571326Method and apparatus for high-speed data transfer employing self-synchronizing quadrature amplitude modulation
269571325Transmission circuit, transmission method, and transmission system
279571174Precoding method, precoding device
289565048Reduced precision vector processing
299564993Method and apparatus for soft demapping in rotated quadrature amplitude modulation (QAM) based communication system
309564976Blind equalization of dual subcarrier OFDM signals
319564974Optical transmission device
329553754Post distortion in satellite communications
339553651Method of high-bitrate wireless communication with a multi-antenna receiver
349553621Apparatus and methods for signal generation, reception, and self-calibration
359548880Transmitter and its control method
369544008Integrated circuit
379538547User equipment initiated discontinuous operation in a wireless communications network
389537792Channel loading for one-to-many communications in a network
399537703Method and apparatus for accommodating higher order modulation in wireless communication
409537640Transmission adaptation
419537621Method and apparatus for information transmission in a radio communication system
429537515Antenna sharing in mobile devices for backscatter radio

2016

439531576Method and apparatus for transmitting modulation symbol using 256QAM in a wireless access system
449531575Systems and methods for providing and/or using an OFDN-OQAM structure
459531478Digital optical modulator for programmable n-quadrature amplitude modulation generation
469531409Switched capacitor transmitter circuits and methods
479525581Wireless communication device and malfunction determining method
489525575Transmission apparatus, reception apparatus and digital radio communication method
499525493Differential-coding and decoding for quadrature duobinary coherent optical communication systems
509521027Method for generating symbols for the automatic gain control of a signal to be transmitted
519521026Tomlinson-harashima precoding with non-overlapping dynamic modulation coding subsets
529520937Radio communication system
539520906Switched capacitor transmitter circuits and methods
549520898Modulator and modulation method using non-uniform 16-symbol signal constellation for low-density parity check codeword having 3/15 code rate
559515860Wideband and narrowband receiver
569515720Radio communication system
579515719Radio communication system
589509545Space and latency-efficient HSDPA receiver using a symbol de-interleaver
599509533Method performed by a sphere decoder based turbo equalizer
609509379System and method for designing and using multidimensional constellations
619504084Method to support an asymmetric time-division duplex (TDD) configuration in a heterogeneous network (HetNet)
629503932Enhancements to the MU-MIMO VHT preamble to enable mode detection
639503931Enhancements to the MU-MIMO VHT preamble to enable mode detection
649503304Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
659503303Symbol mapping for binary coding
669503294Amplitude and phase shift keying modulation for saturated amplifier systems
679497713Accurate uplink power control for CoMP and C-RAN
689491030Phase rotation correcting method and phase rotation correcting apparatus
699491028Phase synchronization of modulation or demodulation for QAM-based multiband TSV-link
709491027Miniature mobile marker system and method
719491026Transmission method
729485764Method and apparatus for encoding transport block
739485137Online reconfiguration transition synchronization
749485030Optical signal modulation
759479637Systems and methods for establishing a diagnostic transmission mode and communicating over the same
769479140Complex-pole load offering concurrent image rejection and channel selection
779473335Overlay modulation technique for COFDM signals based on amplitude offsets
789473332Methods and devices for communications systems using multiplied rate transmission
799473244Flexible 400G and 1 Tb/s transmission over transoceanic distance
809468009Signal processing method and related device
819467394Time and frequency diversity modulation system and method
829467321Method, device and computer program for transmitting data to at least one receiver, and method, device and computer program for receiving data transmitted by a source
839461869System and method for processing data flows
849461865Apparatus and method for demodulating hybrid modulation symbol in wireless communication system using hybrid modulation scheme
859461854Extracting carrier signals from modulated signals
869461775Method, apparatus and system for transmitting information bits
879455852Extracting carrier signals from modulated signals
889455748Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal
899450797Mobile communications system
909444672Data modulation
919444669Peak to average power ratio reduction of OFDM signals
929444598Application-aware dynamic bit-level error protection for modulation-based communication
939444580Optimized data transfer utilizing optimized code table signaling
949444542Radio communication system
959438461Communication system, receiving device, and semiconductor device
969438460Partial discrete fourier transform-spread in an orthogonal frequency division multiplexing system
979438394Hierarchical and adaptive multi-carrier digital modulation and demodulation
989432168Method and apparatus for transmitting and receiving channel status information (CSI) for supporting 256QAM in wireless access system
999432075Communication apparatus and phase adjustment method
1009426631Relay method and relay device
1019426015Apparatus and method for symbol mapping in wireless communication system using multi tone frequency quadrature amplitude modulation
1029425856System and method for multi-dimensional modulation schemes with high noise immunity and low emission idle signaling for automotive area networks
1039425796Data converting device, digital transmitting apparatus using the data converting device, and related data converting method
1049420224Nested symbol constellations representing respective services for graceful degradation in the presence of noise
1059413582Method and apparatus for transmitting and receiving
1069413572Method of converting an optical communications signal and an optical receiver
1079413452Transmitting apparatus, receiving apparatus, and communication system for formatting data
1089413438Wireless communication device and wireless communication method
1099407203Combined amplitude-time and phase modulation
1109401833Method and apparatus for transmitting/receiving signal in wireless communication system
1119401776Transmission method, transmission apparatus, reception method and reception apparatus
1129398604System and method for managing multiradio communications in a single device
1139397781Method and apparatus for improving performance of transmit controlled adaptive modulation in xDSL and G.fast systems
1149397776Constant-capacity physical resource blocks for upstream transmissions over coax
1159391577Low-voltage analog variable gain amplifier with enhanced linearity
1169386055Signaling to application lack of requested bandwidth
1179385832Methodology and method and apparatus for signaling with capacity optimized constellations
1189385812Optical communication interface utilizing N-dimensional double square quadrature amplitude modulation
1199385811Optical communication systems and methods
1209379929Phase imbalance calibration
1219379829Detecting signal leakage in cable networks
1229374156Transmitting apparatus, receiving apparatus, and communication system for formatting data
1239363040Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal
1249362996Pre-coding method and transmitter
1259357341Receiver for backscatter communication
1269356734Transmitter, receiver, and signal processing method thereof
1279356708Communications system using adaptive frequency notching
1289350526Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using in-phase samples
1299344976Wireless communication system, wireless transmission apparatus and wireless transmission method
1309344319Edge-QAM and M-CMTS core timing lock
1319344315Transmitting system and receiving system, and transmitting method and receiving method
1329344310Apparatus and method for performing properrizing frequency shift(p-FRESH) vectorizing
1339338691Method and apparatus for encoding transport block
1349338041Extracting carrier signals from modulated signals
1359337964Carrier recovery aided by pilot symbols carrying information
1369337782Methods and apparatus for adjusting transmit signal clipping thresholds
1379331885Modulation with fundamental group
1389331884Method and apparatus for encoding and decoding for frequency and quadrature-amplitude modulation in wireless communication system
1399331875System and method for communication using orbital angular momentum with multiple layer overlay modulation
1409331825Method for transmitting and receiving additional control signals
1419331726Method for locating defective points in a high frequency (HF) signal transmission path
1429319701Apparatus and method for allocating a data rate in a multi-antenna transmitter
1439319512Systems and methods for establishing a diagnostic transmission mode and communicating over the same
1449319217Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using quadrature-phase samples
1459319114Coding scheme for a wireless communication system
1469316722Systems and methods for providing ATC overlay protocols
1479313747Structured codebook for uniform circular array (UCA)
1489306791Method for designing an amplitude and phase shift keying constellation
1499306778Enabling modulation mode selection
1509306540IF-noise-shaping transistorized current-mode lowpass filter utilizing cross coupled transistors
1519301310Robust techniques for upstream communication between subscriber stations and a base station
1529300517Method and apparatus for transmitting/receiving signal in communication system
1539300504Mobile device transmitter and methods for transmitting signals in different signal dimensions for 3GPP LTE
1549300445Digital domain content processing and distribution apparatus and methods
1559294225Reduced state sequence estimation with soft decision outputs
1569288098Methods and apparatus for envelope tracking system
1579288097Interference cancellation scheme using constellation diagram
1589287931Communication system having reduced crosstalk estimation complexity
1599287906Transmission apparatus and wireless signal transmission method
1609281989Compensation apparatus, signal generator and wireless communication equipment
1619276794High peak to average power ratio (PAPR) mitigation in high speed data networks using symbol mapping adjustment
1629276705Apparatus and method for transporting/receiving data in a CDMA mobile communication system
1639276703Impulse and/or burst noise signal to noise ratio (SNR) aware concatenated forward error correction (FEC)
1649264533Systems and methods for establishing a diagnostic transmission mode and communicating over the same
1659258168Telecommunication signaling using nonlinear functions
1669258157Method and system for mapping bit sequences
1679258085Apparatus and method for transmitting and receiving signal in broadcasting and communication systems
1689252986System and method for communication using orbital angular momentum with multiple layer overlay modulation
1699246735Equalizing a signal modulated using a 5QAM modulation format
1709246732Apparatus and method for transmitting data using a plurality of carriers
1719246724Method and apparatus for performing soft demapping in rotated quadrature amplitude modulation (QAM) based communication system
1729246569Mobile telecommunication system using soft-information dequantizer
1739246525Device and method for predistortion
1749246517Methods for digital signal processing and transmission/reception systems utilizing said methods
1759241343Enhanced access channel masks for xHRPD
1769240866Interleaving method and deinterleaving method
1779240857System, method and fiber-optic transceiver module for bandwidth efficient distortion-tolerant transmissions for high-bit rate fiber optic communications
1789240809Methods for digital signal processing and transmission/reception systems utilizing said methods
1799237055ZigBee receiver exploiting an RF-to-BB current-reuse blixer and hybrid filter topology
1809237053Discrete multi-tone systems for half-duplex IP links
1819237050High peak to average power ratio (PAPR) mitigation in high speed data networks using symbol mapping adjustment
1829236997Wireless transceiver with circulator-based quadrature duplexer and methods for use therewith
1839231813Communications faster than Shannon rate
1849231812Method and arrangement for resource allocation for coded multidirectional relaying
1859231705Communication system with QAM modulation

2015

1869225578High order modulation method, demapping method, and corresponding device
1879225571Method for transmitting preamble for legacy support
1889225407Precoding method, precoding device
1899219541Baseband data transmission and reception in an LTE wireless base station employing periodically scanning RF beam forming techniques
1909210020System and method for suppressing PAPR in MC-CDMA and derivatives
1919209834Symbol mapping for binary coding
1929209826Radio frequency circuit
1939203663Method for signaling a modulation scheme to user equipment in a communication system
1949203556Optimized code table signaling for authentication to a network and information system
1959203555Optimum signal constellation design and mapping for few-mode fiber based LDPC-coded CO-OFDM
1969191261System and method for transmitting a quadrature amplitude modulation (QAM) waveform to a receiver
1979191257Method for determining signal phase rotation of sub-channels within a transmission bandwidth
1989191148Methods and apparatuses for signaling with geometric constellations in a Raleigh fading channel
1999191089Control channel information transmission method, and base station and terminal using the same method
2009191028Complex digital signal compression device, method and computer-readable storage medium, complex digital signal expansion device, method and computer-readable storage medium, and communication device
2019191004Signal converting device and digital transmitting apparatus applying the signal converting device
2029184824Intra-packet antenna diversity systems and methods
2039184773Apparatus and methods for signal generation, reception, and self-calibration
2049184768Data-processing device and data-processing method
2059178740Peak-to-average power ratio reduction for QAM modulation with HD radio signals
2069178609Method of generating code sequence and method of transmitting signal using the same
2079172578High speed transceiver based on embedded leech lattice constellation
2089166859Wireless communication apparatus and transmission power control method
2099166855MIMO communication method, MIMO transmitting device, and MIMO receiving device
2109166850Data retransmission request device, a data transmitter, and a data retransmission method for multi-tone systems
2119166839Systems and methods for reducing effects of local oscillator leakage
2129166834Method and system for corrupt symbol handling for providing high reliability sequences
2139166758Method and user equipment for transmitting uplink control information
2149166628Use of parity-check coding for carrier-phase estimation in an optical transport system
2159161324Method of reporting phase offsets, user equipment and transmission point device using the method
2169160602Method of improving performance in a hierarchical modulation system
2179160601Frame structure for a QAM system
2189160583Method and equipment for controlling radio-frequency signal
2199160503Method and apparatus supporting improved wide bandwidth transmissions
2209160491Receiving apparatus and receiving method
2219154359Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
2229154351Method to minimize interference into legacy SDARS reception by varying overlay modulation as a function of satellite position
2239154212Radio transmission apparatus, radio reception apparatus, and data transmission method
2249154168Signal peak-to-average power ratio (PAR) reduction
2259148253System and method for user equipment cooperation
2269143375Iterative-diversity COFDM broadcasting with improved shaping gain
2279143273Multi-level differential decoding device and method for quadrature amplitude modulation communication system
2289143234Optical communication systems and methods
2299143175Rateless and rated coding using spinal codes
2309137057Constellation map optimization for highly spectrally efficient communications
2319137006Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using quadrature and in-phase samples
2329136982Transmitter and receiver using non-adjacent component interleaving
2339136948Electrical modulator driver circuit for generating multi-level drive signals for QAM optical transmission
2349136927Transmission method, transmission apparatus, reception method and reception apparatus
2359136925Two-path amplify-and-forward relaying method for bandwidth efficient cognitive radios
2369130815Method, receiver, transmitter and communication system for phase error compensation
2379130814Interleaving method and deinterleaving method
2389130809Apparatus and method for transmitting data using a plurality of carriers
2399130808Apparatus and method for communication using near Golay sequence
2409130795Highly-spectrally-efficient receiver
2419130712Physical channel segmentation in wireless communication system
2429130648Method of and radio network for transmitting layered data to multiple receiving stations
2439124471Systems and methods for transceiver communication
2449124332Method, apparatus, and system for interference alignment
2459124319Multi-user multiple input multiple output wireless communications
2469124267Digital transmitter and method for calibrating digital transmitter
2479118525Receiver for sideband mitigation communication systems and methods for increasing communication speeds, spectral efficiency and enabling other benefits
2489118471Method and arrangement in a telecommunication system
2499118319Reconfigurable circuit block supporting different interconnection configurations for rate-conversion circuit and processing circuit and related method thereof
2509116368Optical modulation device and bias voltage control method
2519112760Transmitter and transmitting method for transmitting data via OFDM symbols in which the data is provided from a plurality of different data pipes
2529112595Transmission device, reception device, and radio communication method
2539112560Control channel information transmission method, and base station and terminal using the same method
2549112515Geographic locating remote endpoint monitor device, system, and methodology thereof
2559107087Method and device for determining channel quality indication information
2569106486Transmission apparatus, reception apparatus and digital radio communication method
2579106470Enhanced decoding and demapping method and apparatus for QAM data signals
2589099079Device and method for generating and decoding a side channel signal transmitted with a main channel signal
2599094842Systems and method for orthogonal frequency divisional multiplexing
2609094276Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal
2619094253Systems and methods for adaptive blind mode equalization
2629094199Method and arrangement in a telecommunication system
2639094198Method and arrangement in a telecommunication system
2649094022Geographic locating remote endpoint monitor device, system, and methodology thereof
2659094004Transmitter system with digital phase rotator used for applying digital phase rotation to constellation data and related signal transmission method thereof
2669088997Wireless communication system, mobile station device, and wireless reception method
2679088470Signal processing for independently produced signals
2689088395Transmitter and method for transmitting data block in wireless communication system
2699083593Method and system for multiple training sequences for peak-to-average power ratio reduction in precoded bursts
2709077605Apparatus and method for supporting time-quadrature amplitude modulation in a wireless communication system
2719077597Data communication method and apparatus
2729077499Automatic power saving for communication systems
2739077380Data processing device and data processing method
2749071390Adjusting physical layer transmission properties
2759071276Data-processing device and data-processing method
2769065623Mixed mapping for rate compatible trellis coded modulation
2779065602Integrated circuit for controlling a process
2789065557Signal transmission device and signal transmission method
2799065499Transmission signal generator, transmission signal generating method, reception signal generator, and reception signal generating method
2809059881Hexagonal constellations and decoding same in digital communication systems
2819059831Pilot frequency sequence determination
2829054839Integrated multi-datastream transmission technology
2839030240Signal processing device, signal processing method and computer readable medium
2848995295Using maximal sum-rate mutual information to optimize JCMA constellations

2014

2858743931Systems and methods for a transceiver to transmit or receive test information over a communication channel using multicarrier modulation
2868717928Splitterless multicarrier modem
2878665985Secondary communication signal method and apparatus

2013

2888583060Polar modulator and method for generating a polar modulated signal
2898571123Apparatus and method for mapping symbol

2012

2908265175Methods and apparatuses for signaling with geometric constellations
2918126409Adaptive delay alignment in polar transmitters

2011

2927953172Apparatus and method for transmitting/receiving signal in a communication system

2010

2937839231Low power I/Q modulator

2008

2947453957Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space

2006

2957065158Detection method for phase-modulated symbols with a correlator-bank

2005

2966968016Device and method for I/Q modulation, frequency translation and upsampling
2976965650Digital modulation type signal transmission apparatus and method of displaying received signal in the signal transmission apparatus
2986963622Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes
2996963621Method and apparatus for reducing distortion of digital data
3006957044Satellite communication apparatus
3016952456Ultra wide band transmitter
3026947713Amplitude- and frequency- or phase-modulated radio frequency signal generator and the transmitter incorporating same
3036947712Group delay precompensator for broadband radio frequency transmitter and method of operating the same
3046947503Method and circuit for synchronizing a receiver for a convolutionally coded reception signal
3056944250Variable rate modulator
3066944235SYSTEM AND METHOD OF DATA COMMUNICATION USING TRELLIS CODED MODULATION OR TURBO TRELLIS CODED MODULATION IN COMBINATION WITH CONSTELLATION SHAPING WITH OR WITHOUT PRECODING WHEN USING CONCATENATED CODING SCHEMES OR WHEN WORKING IN A NON-ERROR FREE OPERATION POINT
3076941151Transmitting apparatus, receiving apparatus, and communication system for formatting data
3086940919Bandpass predistortion method and apparatus for radio transmission
3096940874Method for reducing interference from initializing network devices in a data-over-cable system
3106937848Method and device for digital-to-RF conversion
3116937669Digital predistortion system for linearizing a power amplifier
3126937668Method of and apparatus for performing modulation
3136937617Apparatus and method for trellis encoding data for transmission in digital data transmission systems
3146934317Systems and methods for communicating spread spectrum signals using variable signal constellations
3156928121Digital transmitter with constrained envelope and spectral regrowth over a plurality of carriers
3166928101FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
3176925129Method and circuit arrangement for improved data transmission
3186925128Method and apparatus for reducing a peak-to-average power ratio in an orthogonal frequency division multiplex signal
3196917655Coding and decoding a signal modified in accordance with the feedback states of an encoder
3206914943Signal modulation circuit and signal modulation method
3216909755Method and system for increasing data throughput in communications channels on an opportunistic basis
3226904267Amplifying device
3236904099Digital modulation signal generator
3246904097Method and apparatus for adaptive signaling in a QAM communication system
3256898256Synchronization method and apparatus
3266894657Bi-directional vector modulator
3276892341Data transmission apparatus using a constellation rearrangement
3286891902System and method for adjusting a power level of a transmission signal
3296885322Apparatus and method for transmitter phase shift compensation
3306885241Type-based baseband predistorter function estimation technique for non-linear circuits
3316882684Automatic gain control circuit, data communication device and automatic gain control method
3326879642Method of clipping signal amplitudes in a modulation system
3336879641Transmit pre-equalization in a modem environment
3346873860Base transceiver station with distortion compensation
3356870435Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
3366870429Variable rate modulator
3376865232Multi-carrier transmission systems
3386864745Distortion compensation device
3396859490Method and system for wireless communications using different modulation techniques to provide guard times
3406853691Vector modulator using amplitude invariant phase shifter
3416853631Code-division multiplex communication transmitting apparatus and receiving apparatus and method thereof
3426842495Dual mode QAM/VSB receiver
3436842492Method and apparatus for peak-to-average signal reduction for radio frequency transmitters

2004

3446836646Circuit and method for compensating for non-linear distortion
3456836517Distortion compensating apparatus
3466831954Apparatus, and associated method, for compensating for distortion introduced upon a send signal by an amplifier
3476831526Phase and amplitude digital modulation circuit and method
3486809607Circuit and method for compensating for non-linear distortion
3496801582Apparatus and method for improving an output signal from a nonlinear device through dynamic signal pre-distortion based upon Lagrange interpolation
3506798844Correction of phase and amplitude imbalance of I/Q modulator
3516795693Method for controlling the transmitter part of a radio transceiver and a corresponding radio transceiver
3526788750Trellis-based decoder with state and path purging
3536788742Variable length trellis for data transmission
3546788236Method and system for implementing a sigma delta analog-to-digital converter
3556785342Nonlinear pre-distortion modulator and long loop control
3566778611Subdimensional single-carrier modulation
3576775334Equalization and decision-directed loops with trellis demodulation in high definition TV
3586771714Timing recovery using the pilot signal in high definition TV
3596771710Partial frequency offset digital upconversion
3606771709System and method for direct transmitter self-calibration
3616763227Systems and methods for modulator calibration
3626757334Bit rate agile third-generation wireless CDMA, GSM, TDMA and OFDM system
3636757261GSM transceiver with time division duplexed operations for receiving data, monitoring signal strength and transmitting data during a single time frame
3646754285Signal conditioning techniques in DMT-based transmissions
3656754283High speed trellis encoding for discrete multitone transceivers
3666751269Bit-interleaved coded modulation for CATV upstream channels
3676751268Bandpass predistorting expansion method and apparatus for digital radio transmission
3686751267Method for reducing peak values in single-carrier modulated or multi-carrier modulated digital transmitter signals
3696748023Apparatus and method for digital wireless communications
3706748021Cellular radio communications system
3716741662Transmitter linearization using fast predistortion
3726741645Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
3736738431Method for neutralizing a transmitter tube
3746738430Apparatus and method for digital wireless communications
3756738415Bi-directional communication system
3766737918Distortion compensation apparatus
3776735247Method and apparatus in a communication system
3786735028Method and apparatus for increasing data storage capacity via phase and amplitude modulation
3796731694Isolator eliminator for a linear transmitter
3806731693System of and method for compensating a baseband signal to reduce third order modulation distortion
3816731611Method for duplex data transmission with QAM and demodulator for use in the method
3826728467Communication system
3836727936NTSC interference rejection filter
3846724976Communication system
3856724831Pre-distortion apparatus and method thereof
3866724829Automatic power control in a data transmission system
3876717532Communication system and method
3886714601Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
3896711218System and method for received signal decoding
3906711216Method and apparatus for an ultra-wideband radio utilizing MEMS filtering
3916711207System and method for reduced power consumption in digital subscriber line modems
3926711206Modem using a digital signal processor and separate transmit and receive sequencers
3936707857Reference signal pre-distortion for transmitter with frequency synthesizer based phase encoding
3946704368Coding and modulation method and apparatus for its implementation
3956700453Amplitude imbalance compensation of quadrature modulator
3966693973Apparatus, and associated method, for forming a systematic, recursive, space-time code
3976693970QAM modulator
3986693956Power amplifier having negative feedback circuit for transmitter
3996690743Compensation of delay in linearization loop of power amplifier
4006687311Direct QAM modulator with digital feedback control and complex pre-equalization for phase and amplitude distortion
4016687310Trellis coded modulation system for digital television signal with trellis coded data and synchronization symbols
4026683917Base band signal processing circuit capable of improving both noise characteristic and distortion characteristic
4036683915Multi-bit per symbol rate quadrature amplitude encoding
4046678334Methods of reducing the complexity of trellis-based scalar-vector quantizers
4056674823Variable rate modulator
4066674811Efficient pre-distorted 12/4 QAM modulator
4076674808Post-amplifier filter rejection equalization

2003

4086671342Phase detectors in carrier recovery for offset QAM and VSB
4096671337Carrier modulator for use in a transmitter or transceiver
4106671336Gain controller for circuit having in-phase and quadrature channels, and method
4116671327Turbo trellis-coded modulation
4126670900Quadrature mismatch compensation
4136665348System and method for interoperable multiple-standard modulation and code selectable Feher's GMSK, enhanced GSM, CSMA, TDMA, OFDM, and third-generation CDMA, W-CDMA and B-CDMA
4146665308Apparatus and method for equalization in distributed digital data transmission systems
4156662367Poly-phase filters in multicarrier communication systems
4166662337Digital transmission system and method
4176662322Systems, methods, and computer program products for controlling the error rate in a communication device by adjusting the distance between signal constellation points
4186661849Multiple payload slicer system with prenormalization integer values
4196657510Corrective phase quadrature modulator system and method
4206654431Multicarrier personal access communication system
4216654426Correction of nonlinearity of I/Q modulator
4226653909Digital signals, radio transmitter circuits and method
4236650711Quadrature modulation with reduced phase-error distortion
4246647074Removal of clock related artifacts from an offset QAM generated VSB signal
4256647073Linearisation and modulation device
4266643332Method and apparatus for multi-level coding of digital signals
4276636555Amplitude limitation
4286633199Amplifier circuit, radio transmitter, method and use
4296631254Apparatus for producing a radio-frequency signal
4306625208Modem using batch processing of signal samples
4316622282Trellis coding with one-bit constellations
4326621876System and method to reduce phase modulation bandwidth
4336614861Method and apparatus for higher dimensional modulation
4346614854System and method for adaptive predistortion
4356611568Variable rate modulator
4366611567Method and apparatus for pulse shaping
4376611554Method of forming a set of constellations which is intended to be used for transmitting data between a transmitter and a receiver
4386608870Data frame for 8 MHZ channels
4396608868Apparatus and method for digital wireless communications
4406608843Pilot signal transmission technique and digital communication system using same
4416608835Communication system with multicarrier telephony transport
4426608532Circuit configuration for producing a quadrature-amplitude-modulated transmission signal
4436606351Ingress protection in a communication system with orthogonal carriers
4446603822Communicating errors in a telecommunications system
4456594322Method of distributed loop control for a multicarrier telephony transport
4466593827Modulating array transmitter autocalibration method and system
4476591090Predistortion control for power reduction
4486590942Least squares phase fit as frequency estimate
4496587512Apparatus and methods for combined precoding and shaping generating an uncorrelated sequence of samples
4506577898Bi-directional telemetry system and method for transmitting data at high transmission rate
4516574286Modulation system having on-line IQ calibration
4526574285128-ary signal constellations suitable for non-linear amplification
4536570933Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
4546570914Amplitude calculation circuit
4556567478Radio apparatus having distortion compensating function
4566567477Two-dimensional constellation generation, pruning, and partial gray coding for bandwidth and power efficiency
4576560293Apparatus and method for FM remodulation of envelope modulated data signals
4586560291Device and method for transmitting information and device and method for receiving information
4596559994Optical fiber transmitter for long distance subcarrier multiplexed lightwave systems
4606553535Power-efficient communication protocol
4616553063Constellation-multiplexed transmitter and receiver
4626549716Communication system
4636539052System for accelerating the reconfiguration of a transceiver and method therefor
4646538986Data transmission system and method using nQAM constellation with a control channel superimposed on a user data channel
4656535715Hybrid/fiber coax video and telephony communication system with poly-phase filtering
4666535562Method and apparatus for rotating the phase of a complex signal
4676535073Device and method for I/Q modulation, frequency translation and upsampling
4686532253Spread spectrum systems with trellis-coded modulation
4696529558Coding and decoding a signal modified in accordance with the feedback states of an encoder
4706529303Optical communications networks utilizing frequency division multiplexing
4716519010Broadcast transmission system with sampling and correction arrangement for correcting distortion caused by amplifying and signal conditioning components
4726516037Multilevel coding with time diversity
4736515712Signal distortion compensating apparatus and method in digital TV translator
4746512800Method and system for correcting phase and amplitude imbalances of a quadrature modulated RF signal
4756512799Digital communication system and method for increased bit rates
4766510229Communication system with multicarrier telephony transport
4776507625Digital modulator and digital demodulator
4786504879Digital modulation apparatus

2002

4796498823Variable rate modulator
4806493409Phase detectors in carrier recovery for offset QAM and VSB
4816493402Mode control for trellis decoder
4826487405Communication system with multicarrier telephony transport for controlling a plurality of service units
4836487244System and method for transmitting special marker symbol
4846487181Method and apparatus for transmitting and receiving information in a time slot
4856480704Method and arrangement for forming a transmission signal
4866477354Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band
4876476734Method and apparatus for prioritizing information protection in high order modulation symbol mapping
4886470055Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDN, and other systems
4896467092Method for adjusting power in a communication system with multicarrier telephony transport
4906463094Point-to-point secure modem and method
4916463093METHOD AND APPARATUS TO REDUCE SPURIOUS AND INTERMODULATION PRODUCTS IN WIRELESS BROADBAND MULTI-CARRIER DIGITAL TRANSCEIVER EQUIPMENT THROUGH STATIC NON-LINEARITY CORRECTION OF DIGITAL CONVERSION COMPONENTS
4926459741Implementation of N-VSB training sequences in N-squared QAM receiver structures
4936452978Combined shaping and peak-to-average reduction for single carrier modulation systems
4946452945Electrical add-drop multiplexing for optical communications networks utilizing frequency division multiplexing
4956449465Method and apparatus for linear amplification of a radio frequency signal
4966449303System and method for peak power reduction in multiple carrier communications systems
4976449302System and method for peak power reduction in spread spectrum communications systems
4986445749FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA, and CSMA
4996445748Non linear amplitude precorrection for HDTV transmitter
5006442192CDMA type multiple transmission apparatus and CDMA type multiple transmission method
5016441694Method and apparatus for generating digitally modulated signals
5026438164Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
5036438112Device and method for coding information and device and method for decoding coded information
5046434583Fast fourier transform apparatus and method
5056434200TCM revisiting system and method
50664341992N-QAM macrocell
5076433604Phase adjustment technique
5086430228Digital QAM modulator using post filtering carrier recombination
5096429798Combined transmit filter and D-to-A converter
5106426980Method and apparatus for communicating a call
5116424685Polar computation of branch metrics for TCM
5126421806Information transfer method and device, information receiving method and device and network stations using them
5136421398Modulation system having on-line IQ calibration
5146421397Modulation system having on-line IQ calibration
5156421396Variable rate modulator
5166421395Termination of coded or uncoded modulation with path-oriented decoder
5176418558Hybrid fiber/coax video and telephony communication
5186418173Transmission Apparatus
5196417834Arrangement for displaying the signal statuses of a QAM-modulated signal
5206415133Acquisition and tracking in communication system with multicarrier telephony transport
5216411659Timing recovery using the pilot signal in high definition TV
5226411655Systems and methods for converting a stream of complex numbers into an amplitude and phase-modulated radio power signal
5236407843System and method for spectrally efficient transmission of digital data over optical fiber
5246404825Digital radio receiver lock detector
5256400777Linear modulator
5266400774Nonlinearity-caused distortion compensating system
5276400415System and method for predistorting signals to be amplified
5286400233Method and apparatus for compensating for distortion in IQ modulators
5296397276Data transmission by an alternating-frequency analog signal
5306396345Phase and amplitude detector and method of determining errors
5316393258PROCESS AND SYSTEM FOR ADJUSTING THE LEVEL OF THE SPURIOUS LINES OF THE OUTPUT FREQUENCY SPECTRUM OF A SINGLE-SIDEBAND FREQUENCY TRANSPOSITION DEVICE, IN PARTICULAR INCORPORATED INTO A MOBILE TELEPHONE
5326393065Coding and decoding methods and devices and equipment using them
5336392500Rotationally invariant digital communications
5346389083Trellis decoder
5356389080Random phase shift keying
5366389078Configurable circuits for field programmable radio frequency communications equipment and methods therefor
5376385439Linear RF power amplifier with optically activated switches
5386384677Power amplifier having negative feedback circuit for transmitter
5396381265Field programmable modulator-demodulator arrangement for radio frequency communications equipment and method therefor
5406373903Apparatus and method for increasing the effective data rate in communication systems utilizing phase modulation
5416373902Device and method for linearizing transmitter in digital communication system
5426373901Method and apparatus for conditioning modulated signals using window expansion
5436366619Constrained-envelope transmitter and method therefor
5446366585Distributed control in a communication system
5456359897Control system for controlling the processing data of a first in first out memory and method therefor
5466356555Apparatus and method for digital data transmission using orthogonal codes
5476353640Reconfigurable radio frequency communication system
5486351677Method and device in a telecommunication system
5496345070Modem
5506344871NTSC interference rejection filter
5516339621One bit digital quadrature vector modulator
5526336201Synchronization in a communications system with multicarrier telephony transport
5536335951Programmable waveform generator for a global positioning system
5546335767Broadcast transmission system with distributed correction
5556335766System and method for transmitting advanced television signals

2001

5566334219Channel selection for a hybrid fiber coax network
5576330241Multi-point to point communication system with remote unit burst identification
5586320900Methods and arrangements for transmitting high speed data over reduced bandwidth communication resources
5596307893System and method for transmit signal spectral shaping
5606307868Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops
5616304593Adaptive modulation scheme with simultaneous voice and data transmission
5626298096Method and apparatus for determination of predistortion parameters for a quadrature modulator
5636298036Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space
5646292654Digital noise blanker for communications systems and methods therefor
5656292651Communication system with multicarrier transport distribution network between a head end terminal and remote units
5666289487Efficient modified viterbi decoder
5676285412Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system
5686282683Communication system with multicarrier telephony transport
5696282411Mobile communication terminal device
5706282237Multiple transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space
5716279158Dynamic bandwidth allocation
5726278743Non linear amplitude precorrection for HDTV transmitter
5736275990Transport of payload information and control messages on multiple orthogonal carriers spread throughout substantially all of a frequency bandwith
5746272326Distortion compensation address generator, distortion compensating circuit, and transmitter
5756269125System and method for trellis encoding a digital signal
5766266517Method and apparatus for correcting distortion in a transmitter
5776265949Phase compensation apparatus and method for a digital modulator
5786263472Apparatus and method for detecting signal points using signal point-mapping
5796259744Method and apparatus for mapping bits to an information burst
5806256357Communication system
5816252912Adaptive predistortion system
5826243422Waveform shaping method and equipment
5836240142Quadrature modulator and demodulator
5846236837Polynomial Predistortion linearizing device, method, phone and base station
5856236685Pragmatic trellis-coded digital communication with multi-stage branch metrics
5866233712Apparatus and method for recovering information bits from a 64/256-quadrature amplitude modulation treliss coded modulation decoder
5876233290Method for noncoherent coded modulation
5886226323Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
5896226302Multiplex transmission system wherein analog signal is transformed to base band, random-transformed and superimposed on dispersed signal points in vector signal space
5906222891Timing recovery using the pilot signal in high definition TV
5916219088NTSC interference rejection filter
5926208698Quadrature modulator imbalance estimator and modulator stage using it
5936198777Feher keying (KF) modualtion and transceivers including clock shaping processors
5946198774Method and apparatus for resolving spectral inversion ambiguities in coded data
5956195396Encoding/decoding system using 16-QAM modulation encoded in multi-level blocks
5966194963Circuit and method for I/Q modulation with independent, high efficiency amplitude modulation
5976188723Finite impulse response filter for wave-shaping digital quadrature amplitude modulation symbols
5986185259Transmitter/receiver for GMSK and offset-QAM
5996185255System and Method for exciting advanced television signals
6006181199Power IQ modulation systems and methods
6016178161Communications methods and apparatus
6026175599Method and apparatus for transmitting and receiving digital data over a bandpass channel
6036169463Quadrature modulator with set-and-forget carrier leakage compensation

2000

6046166774Combining NTSC visual and aural signals with DTV signals
6056166598Power amplifying circuit with supply adjust to control adjacent and alternate channel power
6066160855Digital modulation method and digital communication system
6076160854Concatenated trellis coded modulation and linear block codes
6086157681Transmitter system and method of operation therefor
6096157679Method of adding encryption/encoding element to the modulation/demodulation process
6106157254Double side band pilot technique for a control system that reduces distortion produced by electrical circuits
6116154456Apparatus and method for digital data transmission using orthogonal codes
6126151370Path-oriented decoder for signal-dependent noise
6136144712Variable rate modulator
6146141387Digital QAM modulator using post filtering carrier recombination
6156137841Signal power adjustment for QAM communication systems
6166137829System and method for transmitting special marker symbols
6176130918Method and apparatus for reducing the peak-to-average ratio in a multicarrier communication system
6186125266Dual band architectures for mobile stations having transmitter linearization feedback
6196125103Method and device for reducing the crest factor in digital transmission procedures
6206115415Mapper for high data rate signalling
6216108385Method and apparatus for reducing intermodulation distortion in digital wideband transmission systems
6226104761Constrained-envelope digital-communications transmission system and method therefor
6236104758Process and system for transferring vector signal with precoding for signal power reduction
6246101223System and method for optimizing the uncoded modulation of circular constellations using circular precoding and nonlinear encoding
6256101217System and method for demodulating digital information from an odd constellation
6266097764Pragmatic trellis-coded modulation system and method therefor
6276094458Arrangements and methods for generating a radio frequency signal
6286091941Radio apparatus
6296091784Method and apparatus for constant envelope quadrature amplitude modulation
6306091765Reconfigurable radio system architecture
6316084918Data transmission method and devices
6326084915Signaling method having mixed-base shell map indices
6336084883Efficient data transmission over digital telephone networks using multiple modulus conversion
6346081698Radio apparatus and offset compensating method
6356081567Method and apparatus for synchronizing a data communication system to a periodic digital impairment
6366081158Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
6376078628Non-linear constant envelope modulator and transmit architecture
6386078626Methods and systems for communicating information using separable modulation constellations
6396061407Transmission method and apparatus employing trellis-augmented precoding
6406055021System and method for obtaining synchronization to a digital frame
6416052821Trellis coded QAM using rate compatible, punctured, convolutional codes
6426049651Communication system
6436049572Optimization of QAM constellation space for auxiliary I-Q signaling
6446046649Communication system employing paired power amplifiers and drift compensation feedback control loops
6456044117Peak clipping circuit provided in a quadrature modulator and a method of clipping peak levels of in-phase and quadrature signals
6466044109Modem signal transmitter, modem signal transmitting method, modem signal receiver, modem signal receiving method, modem signal transmitting/receiving system and modem signal transmitting/receiving method
6476041432Apparatus and method for detecting signal points using signal point-mapping
6486035428Apparatus for deinterleaving and output-processing decoded data in a trellis decoder
6496034999Burst signal transmitter capable of producing correct transmission output in initial burst signal
6506034996System and method for concatenating reed-solomon and trellis codes
6516026122Process and system for transferring vector signal with precoding for signal power reduction
6526026120System and method for using circular constellations with uncoded modulation
6536023493Method and apparatus for synchronizing a data communication system to a periodic digital impairment

1999

6546009123Process and system for transferring vector signal with precoding for signal power reduction
6556009117Spread spectrum communication system
6566009082Computer-based multifunction personal communication system with caller ID
6576005897Data communication system and method therefor
6586002923Signal generation in a communications transmitter
6595999569Communication system
6605995548Signaling method using multiple modulus shell mapping
6615991337Method and apparatus for improving the signal-to-noise ratio of low-magnitude input signals in modems
6625991308Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant
6635987072Phase modulation scheme and apparatus
6645987071Digital modulator and digital demodulator
6655982818Method for implementing trellis codes for ISI channels
6665978123Method for the transmission of a low-rate supplementary channel in high-rate coherent optical transmission systems
6675973559Transmitter for high frequency signals
6685970098Multilevel encoder
6695966412Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal
6705966376Apparatus and method for digital data transmission using orthogonal cyclic codes
6715960029Coherent dual-channel QPSK modulator/demodulator for CDMA systems, and modulating/demodulating methods therefor
6725956373AM compatible digital audio broadcasting signal transmision using digitally modulated orthogonal noise-like sequences
6735953377Coded modulation using repetition and tree codes
6745946047Network system for handling digital data over a TV channel
6755944850Digital transmission system and method comprising a punctured product code combined with a quadrature amplitude modulation
6765937008Method and system for controlling the minimal distance between successive errors in digital radio transmission
6775931965Cyclic trellis coded modulation
6785929703Method and device for modeling AM-AM and AM-PM characteristics of an amplifier, and corresponding predistortion method
6795926507Quotient coding modem
6805923651Increasing data throughput in a wireless telecommunications environment
6815920416Optical method of transmitting digital data
6825917858Digital transmission system with symbol encoding which maximizes the signal amplitude-to-noise ratio
6835917384Modulating array transmitter and method having improved on-off keying
6845914620Frequency doubling of a quadrature-amplitude modulated signal using a frequency multiplier
6855913154VSWR control technique for terminal products with linear modulation
6865909642Nonlinear distortion detecting circuit and nonlinear distortion compensating circuit for transmitter
6875907565Cyclic trellis coded modulation
6885907264Power recycling for modulating array transmitters
6895905760Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type
6905903823Radio apparatus with distortion compensating function
6915903611Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type
6925903546Means and method of improving multiplexed transmission and reception by coding and modulating divided digital signals
6935901346Method and apparatus utilizing a compensated multiple output signal source
6945901179Waveform shaping method and equipment
6955901135Signal constellation time division multiplexing arrangement
6965894498Method and apparatus for analyzing a composite carrier signal
6975892879Communication system for plural data streams
6985886584Method and apparatus for adjusting modulation accuracy of an orthogonal modulation
6995883551Quadrature modulator malfunction estimator and modulator stage using it
7005881107Transmission system for digital signals, and transmitter and receiver therefor
7015881047Simultaneous analog and digital communication with improved phase immunity
7025878077Apparatus for high-speed simultaneous voice/data communications
7035870429Apparatus method, and software modem for utilizing envelope delay distortion characteristics to determine a symbol rate and a carrier frequency for data transfer
7045867071High power transmitter employing a high power QAM modulator
7055864492Randomized digital waveshape samples from a look up table
7065862184Mapper for high data rate transmission through channels subject to robbed bit signalling
7075862181Transmitting receiving apparatus
7085862179Mapper for high data rate signalling
7095859877Simultaneous analog and digital communication using fractional rate encoding

1998

7105852634Data coding system
7115852389Direct QAM modulator
7125844944Simultaneous analog and digital communication using partitioning of bits into words
7135838734Compensation for local oscillator errors in an OFDM receiver
7145838733Method and apparatus for mitigating signal distortion in a communication system
7155838728High rate reed-solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
7165838727Method and apparatus for transmitting and receiving digital data over a bandpass channel
7175838724Spectral and power shaping mapper for high data rate signalling
7185835536Method and apparatus for reducing peak-to-average requirements in multi-tone communication circuits
7195835480Circuitry and method for simultaneously transmitting voice and data information
7205832044Transmitter antenna diversity and fading-resistant modulation for wireless communication systems
721583204164 QAM signal constellation which is robust in the presence of phase noise and has decoding complexity
7225825828Method and apparatus for multi-level quadrature amplitude modulation
7235825820Waveform shaping method and equipment
7245825816Spectral and power shaping mapper for high data rate signalling
7255822371Mapper for high data rate signalling
7265819000Magnetic recording and playback apparatus
7275815536Multivalue digital transmission system
7285815531Transmitter for encoded data bits
7295815503Digital simultaneous voice and data mode switching control
7305815046Tunable digital modulator integrated circuit using multiplexed D/A converters
7315812601Coding for higher-level modulation
7325812594Method and apparatus for implementing carrierless amplitude/phase encoding in a network
7335809083Differentially encoded pilot word system and method for wireless transmissions of digital data
7345802451Non-linear compensation circuit for a power amplifier
7355802241Communication system
7365802111Complex constellation point multiplier
7375796784Method and apparatus for modifying amplitude of at least one symbol
7385796783Digital transmission system
7395796716Method and apparatus for simultaneous voice/data transmission
7405793759Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes
7415790570Concatenated trellis coded modulation and linear block codes
7425790532Voice over video communication system
7435787133Signal modulation employing a pseudo-random sequence of pilot symbols
7445784417Cyclic trelles coded modulation
7455784402FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
7465781076Digital quadrature amplitude modulators
7475778029Signal conditioner with symbol addressed lookup table producing values which compensate linear and non-linear distortion using transversal filter
7485768317Equalization filter compensating for distortion in a surface acoustic wave device
7495768269Apparatus and method for establishing frame synchronization in distributed digital data communication systems
7505767750Modulator
7515764628Dual port interface for communication between a voice-over-data system and a conventional voice system
7525754589Noncompressed voice and data communication over modem for a computer-based multifunction personal communications system
7535748678Radio communications apparatus
7545745837Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA
7555742679Optimized simultaneous audio and data transmission using QADM with phase randomization
7565740520Channel correction transceiver
7575734681Process and system for transferring vector signal with precoding for signal power reduction
7585729575Transmitter and receiver system and method utilizing a pilot carrier notch data encoded signal
7595717706Apparatus and method for detecting signal points using signal point-mapping
7605714916Modulator
7615710754Multiplex transmission system wherein analog signal is transformed to base band random-transformed and superimposed on dispersed signal points in vector signal space
7625706311Modulator circuit
7635705958Apparatus for correcting quadrature error in a modulator and/or in a demodulator for a signal having a plurality of phase states, a corresponding transmitter, and a corresponding receiver

1997

7645703909Programmable voltage controlled attenuator
7655699383High-power linear amplification using periodically updated amplitude and phase correction values
7665696794Method and apparatus for conditioning digitally modulated signals using channel symbol adjustment
7675692013Shared resources modulator-demodulator circuits for use with quadrature amplitude modulated signals
7685684834Simultaneous analog and digital communication using fractional rate encoding
7695675590Cyclic trellis coded modulation
7705673292AM-PSK system for broadcasting a composite analog and digital signal using adaptive M-ary PSK modulation
7715673268Modem resistant to cellular dropouts
7725673257Computer-based multifunction personal communication system
7735668923Voice messaging system and method making efficient use of orthogonal modulation components
7745666378High performance modem using pilot symbols for equalization and frame synchronization
7755661718Simultaneous analog and digital communication
7765659578High rate Reed-Solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
7775654986Method and apparatus for decoding trellis coded QAM signals
7785638401Method and apparatus for generating plural quadrature modulated carriers
7795636251Receiver for a trellis coded digital television signal
7805629958Data frame structure and synchronization system for digital television signal
7815625647Transmitter having automatic level control function
7825623516Frame synchronization for QAM
7835623226Automatic calibration of carrier suppression and loop phase in a Cartesian amplifier
7845621762Radio with peak power and bandwidth efficient modulation
7855621761Rotationally invariant trellis coding incorporating transparent binary convolutional codes
7865619508Dual port interface for a computer-based multifunction personal communication system
7875617423Voice over data modem with selectable voice compression
7885617063Matched filters for processing related signal components
7895613226Linear transmitter for use in combination with radio communication systems
7905612651Modulating array QAM transmitter
7915608760Method and circuits for the transmission and reception of numeric signals, in which the peak power of the filtered signal transmitted is reduced, compatible with conventional coding techniques
7925608755Method and apparatus for implementing carrierless amplitude/phase encoding in a network
7935606578Radio with peak power and bandwidth efficient modulation using asymmetric symbol constellations
7945604772Transmission system and modem utilizing coded modulation
7955604771System and method for transmitting sound and computer data
7965600677Trellis coded modulation system for digital television signal
7975600672Communication system
7985600649Digital simultaneous voice and data modem
7995598436Digital transmission system with predistortion
8005592586Voice compression system and method

1996

8015586146Programmable voltage controlled attenuator
8025583889Trellis coded modulation system for HDTV
8035581578Digital communication system and a receiver for use in such a system
8045577041Method of controlling a personal communication system
8055574725Communication method between a personal computer and communication module
8065565926Method and apparatus for communicating digital television signals using a signal constellation formed by four signal constellations placed in the quadrants
8075561468Multiplexed modulation system for robust audio digital television
8085559835Method and apparatus for encoding data for transfer over a communication channel
8095559807Power amplifier linearization in a TDMA mobile radio system
8105559793Echo cancellation system and method
8115559791Companding of voice signal for simultaneous voice and data transmission
8125559561Coded modulation with shaping gain and tomlinson precoding
8135555275Multi-threshold and hierarchical television signal transmission system
8145553318Transmitter having envelope feedback loop and automatic level control loop
8155548615Methods and apparatus for rotationally invariant multilevel coding
8165548253Spectrally efficient quadrature amplitude modulator
8175546395Dynamic selection of compression rate for a voice compression algorithm in a voice over data modem
8185544328Coded modulation with unequal error protection
8195541964Distortion compensation technique
8205537441Controlled simultaneous analog and digital communication
8215537436Simultaneous analog and digital communication applications
8225537430Trellis-coded modulation system
8235535245Modulation/demodulation circuit for a digital signal recorder/reproducer
8245535228Device and method for achieving rotational invariance in a multi-level trellis coding system
8255535204Ringdown and ringback signalling for a computer-based multifunction personal communications system
8265534828Digitized quadrature modulator
8275534827Modulator
8285533048Apparatus and method for compensating for limiter induced non-linear distortion in a wireless data communication system
8295524025Coding for digital transmission
8305521949Synchronization scheme for digital communications systems transporting data at a customer-controlled rate
8315521942Method for increasing the dynamic range of a signal in a simultaneous voice and data system by the use of overlapping signal point regions and trellis coding
8325519730Communication signal having a time domain pilot component
8335515400Method for arranging signal points in a quadrature amplitude modulation/demodulation system
8345512321Process for coating elongated materials with multiple layers
8355511096Quadrature amplitude modulated data for standard bandwidth television channel
8365509033Quadrature overlapping modulation system
8375507033Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
8385507014Radio transmitter circuit with time dependant inhibited transmissions
8395506866Side-channel communications in simultaneous voice and data transmission
8405504465Microwave modulator having adjustable couplers
8415502744Data coding system
8425500875QAM encoding
8435500859Voice and data transmission system
8445493587Method and circuits for reducing the peak power of the filtered signal transmitted in a digital link
8455493586TCM scheme with fractional bit rates, framing signals and constellation shaping
8465491457F-modulation amplification
8475486825Convolutional encoders for modems which implement the "Cole code"
8485481567Method and apparatus for automatically adapting the amount of warping in a system transmitting information through a non-linear channel

1995

8495475716Method for communicating block coded digital data with associated synchronization/control data
8505475713Shaped signal spaces in a simultaneous voice and data system
8515475691Voice activated date rate change in simultaneous voice and data transmission
8525473621Rotationally invariant coding
8535471497Method and apparatus for variable rate signal transmission in a spread spectrum communication system using coset coding
8545471470Computer-based multifunction personal communications system
8555469127Amplification apparatus and method including modulator component
8565469105Transmitter and power amplifier therefor
8575467132Method for digital transmission of hierarchical HDTV, EDTV and SDTV television signals
8585465273Modem utilizing parity and convolutional encoder feedback
8595459749Multi-level superposed amplitude-modulated baseband signal processor
8605455839Device and method for precoding
8615453986Dual port interface for a computer-based multifunction personal communication system
8625452289Computer-based multifunction personal communications system
8635450044Quadrature amplitude modulator including a digital amplitude modulator as a component thereof
8645448592Coded QAM system
8655448555Simultaneous analog and digital communication
8665448203Negative-feedback amplifier and feedback controlling method thereof
8675446758Device and method for precoding
8685444712Communication mode identification technique
8695442626Digital communications system with symbol multiplexers
8705440585Applications of simultaneous analog and digital communication
8715440347Method and apparatus for randomizing training sequences to minimize interference in digital transmissions
8725438301Modem having a phase corrector and a voltage controlled oscillator implemented using a multi-stage ring oscillator
8735436930Simultaneous analog and digital communications with a selection of different signal point constellations based on signal energy
8745434887Quadrature modulation circuit for use in a radio transmitter
8755428646Device and method for frame synchronization in a multi-level trellis coding system
8765428641Device and method for utilizing zero-padding constellation switching with frame mapping
8775425050Television transmission system using spread spectrum and orthogonal frequency-division multiplex
8785420536Linearized power amplifier
8795418798Multidimensional trellis-coded communication system
8805408502Apparatus and method for communicating digital data using trellis coded QAM with punctured convolutional codes
8815408499Multilevel code for transmission device
8825404378Distortion compensating circuit
8835396519Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel
8845396518Apparatus and method for communicating digital data using trellis coding with punctured convolutional codes
8855396196Quadrature modular with adaptive suppression of carrier leakage
8865394440High speed modem systems incorporating distribution preserving Tomlinson encoding and decoding for secondary channels
8875388124Precoding scheme for transmitting data using optimally-shaped constellations over intersymbol-interference channels
8885387883Quadrature modulator having controlled phase shifter
8895386590Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
8905384809Error control coding arrangement for digital communications system
8915381449Peak to average power ratio reduction methodology for QAM communications systems
8925381108Automatic calibration of the quadrature balance within a cartesian amplifier

1994

8935377194Multiplexed coded modulation with unequal error protection
8945371481Tuning techniques for I/Q channel signals in microwave digital transmission systems
8955369789Burst signal transmitter
8965343500Non-linear encoder and decoder for information transmission through non-linear channels
8975343499Quadrature amplitude modulation synchronization method
8985339054Modulated signal transmission system compensated for nonlinear and linear distortion
8995331670Synchronization scheme for a digital communications system
9005329551Overlapped multilevel codes
9015329259Efficient amplitude/phase modulation amplifier
9025323424Multistage decoder
9035321799Signalling transition control in a modulated-signal communications system
9045321725Method and apparatus for communicating digital information such as compressed video using treillis coded QAM
9055315617QAM encoding for high-definition television system
9065313279Digital carrier combining apparatus in a multiple QAM digital television signal receiver
9075311547Partial-response-channel precoding
9085311543Television transmission system using two stages of spead-spectrum processing
9095307377System for modulating/demodulating digital signals transmitted with encoded modulation
9105305352Coded modulation with unequal error protection
9115293406Quadrature amplitude modulator with distortion compensation
9125291521Index assignment in redundancy-coded data communication systems
9135291520Methods and apparatus employing distribution preserving Tomlinson precoding in transmission of digital data signals
9145280503Data communication system with data rate throttling

1993

9155267021Multiresolution digital television broadcast system
9165265127Non-linear encoder and decoder for information transmission through non-linear channels
9175263051Device and method of interleaving for a trellis precoding system
9185258987Multilevel coding using trellis-coded modulation and reed-solomon codes
9195253271Method and apparatus for quadrature amplitude modulation of digital data using a finite state machine
9205251236Fractional rate modem with trellis
9215249200Device and method for combining precoding with symbol-rate spectral shaping
9225243627Signal point interleaving technique
9235237292Quadrature amplitude modulation system with compensation for transmission system characteristics
9245233629Method and apparatus for communicating digital data using trellis coded QAM
9255231647Modem comprising saw filters having opposite bassband delay characteristics
9265231639Frame step-out detecting method for data transmission and system thereof
9275230010Fractional rate modulation
9285222077Radix mapping with variable number of symbols in mapping period
9295214672Trellis precoding for fractional bits/baud
9305214656Multiplexed coded modulation with unequal error protection
9315204881System for set-up of transmitters in high capacity digital radio links
9325200978Process for actuation of multi-level digital modulation by a digital signal processor
9335195107Technique for compensating for intersymbol interference
9345193224Adaptive phase control for a power amplifier predistorter
9355185763Data bit to constellation symbol mapper
9365177455Digital phase and amplitude modulator

1992

9375172071Linearized output control of a nonlinear amplifier
9385168509Quadrature amplitude modulation communication system with transparent error correction
9395164963Coding for digital transmission
9405162812Technique for achieving the full coding gain of encoded digital signals
9415159610Trellis precoding for modulation systems
9425153536Suppressed carrier modulator formed from two partial modulators each including a phase delay path
9435150381Trellis shaping for modulation systems
9445148448Adaptive predistortion circuit with memory
9455134633Digital communications synchronization scheme
9465127024Conversion filtering for digital signaling systems
9475124861Digital signal magnetic recording and playback apparatus employing quadrature amplitude modulation
9485123031Control voltage generator in a transmitter arrangement for digitally modulated signals
9495119403Superframes
9505119399Quadrature measurement and calibration of a vector modulator
9515115453Technique for designing a multidimensional signaling scheme
9525115438Method for redundancy-saving, error-correcting coding in digital radio link systems having multi-level modulation
9535113414Predistortion arrangement for a digital transmission system
9545113412Method and apparatus for mapping an eight dimensional constellation of a convolutionally coded communication system
9555113411Modulator and demodulator for data transmission systems
9565113401Block coding scheme for fractional-bit transmission
9575107520Adaptive predistortion circuit for a digital transmission system
9585107504Multilevel quadrature amplitude modulator capable of reducing a maximum amplitude of a multilevel quadrature amplitude modulated signal regardless of transmission data information or redundant information
9595105446Digital method of correcting non-linearity in a transmission chain, and apparatus implementing the method
9605105445Predistortion arrangement for a digital transmission system
9615105443Inband coding of secondary data
9625105442Coded modulation with unequal error protection
9635103227Modulus converter for fractional rate encoding
9645095497Technique for achieving the full coding gain of encoded digital signals
9655095392Digital signal magnetic recording/reproducing apparatus using multi-level QAM modulation and maximum likelihood decoding
9665091919Transmitter arrangement for digitally modulated signals
9675081649Method of quadrature-phase amplitude modulation
9685081647Communication of a voice signal via continuous quadrature amplitude modulator

1991

9695066923Linear transmitter training method and apparatus
9705066922Stabilizing circuit for feedback RF amplifier
9715058135Modulating arrangement for phase and amplitude modulation of a wave
9725058134Process of synchronizing a receiving modem after a training on data
9735056117Decision feedback equalization with trellis coding
9745054037Method of servo-controlling the parameters of a modulator having 2.sup.n phase and amplitude states, and a circuit for implementing the method
9755054036Digital signal coding
9765052000Technique for improving the operation of decision feedback equalizers in communications systems utilizing error correction
9775050188Method and apparatus for transmitting coded information
9785048056Method and apparatus for mapping an eight dimensional constellation of a convolutionally coded communication system
9795040194Method and apparatus for providing for automatic gain control of incoming signals in a modem
9805040191Partial response channel signaling systems
9815036526Method of communicating stuffing indications in a multi-level communications system
9825022053Data communications with alternation of signaling constellations
9834999590Four state phase shift modulator, in particular for amplitude modulation of two carriers in quadrature with a large number of states
9844993047Volterra linearizer for digital transmission
9854993046Coded modulation communication system
9864985688Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto

1990

9874980897Multi-channel trellis encoder/decoder
9884967164Adaptive predistortion circuit
9894965536Quadrature amplitude modulation system using digital filters
9904959842Signal constellations
9914941154Trellis coding method and arrangement for fractional bit rates
9924939555Trellis coding arrangement
9934937844Modem with data compression selected constellation
9944933956Simplified decoding of lattices and codes
9954924516Method and system for a synchronized pseudo-random privacy modem
9964924492Method and apparatus for wideband transmission of digital signals between, for example, a telephone central office and customer premises
9974910474Method and apparatus for generating phase and amplitude modulated signals
9984901333Data transmission systems
9994901331Trellis codes with passband spectral nulls
10004894844Signal constellations
10014891823Channel encoder for generating rotationally invariant trellis codes
10024891806Constellation multiplexed inband secondary channel for voiceband modem

1989

10034888792Multi-level quadrature amplitude modulation and demodulation system
10044882737Signal transmission method
10054882733Method and apparatus for combining encoding and modulation
10064881049QAM modulator/demodulator
10074873701Modem and method for 8 dimensional trellis code modulation
10084868864Autocorrelating 2400 bps handshake sequence detector
10094860316Multilevel amplitude modulation and demodulation communication system
10104855692Method of quadrature-phase amplitude modulation
10114849703Method and apparatus for generating a data sampling clock locked to a baud clock contained in a data signal
10124843613Digitally implemented modulators
10134843351Vector modulation signal generator
10144837766Frame step-out detecting system
10154833693Coded modulation system using interleaving for decision-feedback equalization
10164823346Maximum likelihood decoder
10174816783Method and apparatus for quadrature modulation
10184808937Phase-locked loop for a modem
10194801899Quadrature amplitude modulation/demodulation device using multi-level digital signals

1988

10204794621Apparatus for transmitting information by angle modulation
10214780884Suppressed double-sideband communication system
10224777453Quadrature amplitude modulator using switched capacitor filter
10234771438Method and apparatus for phase reference recovery in high speed fast turnaround modem
10244761784Modem and method using multidimensional coded modulation
10254759039Simplified recovery of data signals from quadrature-related carrier signals
10264755998Coded modulation system
10274751478Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component
10284750191D/A converter capable of producing an analog signal having levels of a preselected number different from 2.sup.N and communication network comprising the D/A converter
10294748626Viterbi decoder with reduced number of data move operations
10304737969Spectrally efficient digital modulation method and apparatus
10314736389Technique for synthesizing the modulation of a time varying waveform with a data signal
10324733401Block coding into 24 coordinates and detection of transmitted signals
10334731799Means and method for block encoding detection and decoding
10344726029Error-correcting modem
10354721928Multilevel modulator capable of producing a multilevel quadrature amplitude modulated signal having (2.sup.n +.alpha.) output signal points
10364717894Calibration of vector modulators using a scalar detector

1987

10374716385Multilevel modulator comprising a compact error correcting code producing unit
10384713829Coded modulation system with a simplified decoder capable of reducing the effects of channel distortion
10394713817Multidimensional, convolutionally coded communication systems
10404700349Coded modulation system
10414700151Modulation system capable of improving a transmission system
10424677626Self-synchronizing interleaver for trellis encoder used in wireline modems
10434677624Self-synchronizing de-interleaver for viterbi decoder used in wireline modems
10444675619Multiple quadrature-phase amplitude modulating system capable of reducing a peak amplitude
10454672634Arrangement for generating an angle-modulated carrier signal of constant amplitude in response to data signals
10464665532Radio communication system
10474661948Digital quadrature amplitude modulator
10484661945Differential coding system and apparatus therefor
10494660214QANI Trellis-coded signal structure
10504660213Signal structure for data communication
10514651320Inband coding of secondary data
10524646326QAM modulator circuit
10534646305High speed data modem using multilevel encoding
10544644565Superposed quadrature modulated baseband signal processor
10554644537Inband coding of secondary data

1986

10564630288Data transmission with block coding
10574630287Secondary channel signalling in a QAM data point constellation
10584630286Device for synchronization of multiple telephone circuits
10594627077Modified QAM data point constellation for secondary channel signalling
10604626803Apparatus for providing a carrier signal with two digital data streams I-Q modulated thereon
10614622670Error-correction coding for multilevel transmission system
10624617537Method for digital quadrature amplitude modulation
10634606048Radio communication system
10644601044Carrier-phase adjustment using absolute phase detector
10654597090Block coded modulation system
10664586182Source coded modulation system
10674583236Modified absolute phase detector
10684581748QAM with DC bias in one channel
10694573153Data transmitting-receiving system for suppressing data error
1070457154916-QAM Modulator with PLL amplification devices

1985

10714562426Symbol coding apparatus
10724562425Differential encoder and decoder for transmitting binary data
10734553237Error-correction system for two-dimensional multilevel signals
10744538284Signal structures with data encoding/decoding for QCM modulations
10754534040Method and apparatus for coding a binary signal
10764529950Digital phase and amplitude modulator
10774525847QAM encoder
10784525846Modem in-band secondary channel via radial modulation
10794521878Data transmitting-receiving system
10804520490Differentially nonlinear convolutional channel coding with expanded set of signalling alphabets
10814512013Simultaneous transmission of speech and data over an analog channel
10824509171Modem multiplexer synchronization by radial modulation
10834495477Multiple amplitude and phase shift keyed signal modulation method
10844494239Frame synchronization and phase ambiguity resolution in QAM transmission systems
10854493082Soft decision convolutional code transmission systems

1984

10864489418Differential encoding technique
10874485357Circuit for amplitude and phase modulation of carrier signal by two respective input signals
10884483012Differentially convolutional channel coding with expanded set of signalling alphabets
10894464767System for generation of multiple pointed QAM signal spaces by use of synchronous Qam transmitters
10904458216Switched-capacitor modulator for quadrature modulation
10914457004Multidimensional channel coding
10924447908Method of transmitting binary data sequences and arrangement for enabling the rapid determination of the end of a transmitted binary data sequence
10934442530Digital transmitter with vector component addressing
10944433310Modulator-demodulator for four level double amplitude modulation on quadrature carriers

1983

10954404532Modulator having improved bandwidth and power requirements
10964403331Method and apparatus for transmitting data over limited bandwidth channels

1982

10974358853Digital modem transmitter
10984355397Full duplex communication system for voice grade channels
10994347616Digital multi-level multi-phase modulation communication system
11004346473Error correction coding method and apparatus for multilevel signaling
11014327439Method for generating modem transmission signals with quadrature amplitude modulation

1981

11024302757Bore telemetry channel of increased capacity
11034291277Adaptive predistortion technique for linearizing a power amplifier for digital data systems
11044285062Digital multi-level multi-phase modulation communication system
11054271527Double side band-quadrature carrier modulation signal structures

1980

11064217467Amplitude and periodic phase modulation transmission system

1979

11074166923Amplitude- and periodic phase-modulation transmission system

1978

11084123710Partial response QAM modem
11094085449Digital modem
11104084137Multidimensional code communication systems

1977

11114055727Partial response, quadrature amplitude modulation system
11124037049Modulator and demodulator for data communications network

1976

11133988539Data transmission system using optimal eight-vector signaling scheme
11143983485Multi-phase and multi-amplitude level modulator and modulation and demodulation methods
11153980971Modulator for hybrid modulation by more and less significant digital signals in succession in each clock interval and counterpart demodulator
11163955141Synchronizing circuit for modems in a data communications network
11173931860Low-profile platform scale
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017