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2017

19608735MIMO equalization optimized for baud rate clock recovery in coherent DP-QPSK metro systems
29602325Transmitter and method of transmitting
39602143System and method for generating wireless electromagnetic transmissions modulated with software defined complex waveforms
49590834Radio communication apparatus capable of switching modulation schemes
59590663Radio apparatus
69584349Transmission circuit
79578447High speed overlay mode for burst data and real time streaming (audio) applications
89577684High frequency time interleaved digital to time converter (DTC)
99577678Bit 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
109577638Digital signal up-converting apparatus and related digital signal up-converting method
119571626Automobile cellular, WLAN and satellite communications
129571317Bandwidth efficient continuous phase modulation
139565043Hybrid I-Q polar transmitter with quadrature local oscillator (LO) phase correction
149564975Optical transmission device, method of optical transmission, and non-transitory computer-readable medium
159564964Optical signal processing device, optical signal processing method and recording medium
169564963Automatic power control system for a code division multiple access (CDMA) communications system
179559761Proximity-based services discovery privacy
189553660Hybrid orthogonal/non-orthogonal multiple access for radio signal transmission and reception
199553643User equipment and methods for codebook subsampling for enhanced 4TX codebooks
209548878Digital radio frequency transceiver system and method
219548877Digital communication system
229544007Wireless transmission system, wireless communication device, and wireless communication method
239537687Multi-modulation for data-link power reduction and throughput enhancement

2016

249531451System and method for high-speed analog beamforming
259525581Wireless communication device and malfunction determining method
269525575Transmission apparatus, reception apparatus and digital radio communication method
279521023Systems for analog phase shifting
289520988Adaptation to 3-phase signal swap within a trio
299520955Detection apparatus and detection method for received signal strength indicator
309520923Low-complexity ACPR-enhancing digital RF MIMO transmitter
319520832Device for connecting two pieces of equipment via an Ethernet link, and a docking station for such a piece of equipment
329515815Transpositional modulation systems, methods and devices
339510139Phy layer options for body area network (BAN) devices
349510138PHY layer parameter for body area network (BAN) devices
359509489Correction of quadrature modulation errors
369509486Techniques for indicating a frame format for transmissions using unlicensed radio frequency spectrum bands
379509410High-speed optical transceiver systems and methods
389503167Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals
399503153Spread spectrum GMSK signals
409497057Method for performing channel sounding in wireless LAN system and apparatus
419497056Conveying metadata by modulation of pilot carriers in COFDM broadcasting
429497054Electronic devices having interconnect radiation mitigation capabilities
439485128System and method for scrambling using a bit scrambler and a phase scrambler
449485126Signal combining system for constant envelope transmission of information
459485076Dynamic polarization modulation and control
469485030Optical signal modulation
479484975Modular microwave backhaul outdoor unit
489479373Packet processor verification methods and systems
499473268Transmitting apparatus, receiving apparatus, transmission method, and reception method
509468077Lighting system and method for operating a lighting system using power consumption for information transmission
519467321Method, 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
529450848Methods and apparatus for adjusting a phase of a transmitted signal based on an evaluation of an eye opening in an eye diagram
539450716Cross-correlated digital wireless communication system
549444666Device for generating a vector-modulated output signal and method for generating a vector-modulated output signal
559438456Systems and methods of polyphase generation
569438305Method for transmitting non binary error correcting code words with CCSK modulation, and corresponding signal and device
579438301PLL circuit, calibration method, and wireless communication apparatus
589432152Video multimode multimedia data communication systems
599431961Phase shifting mixer
609431958Apparatus and method for generating an oscillator signal
619426005Method for indirect measurement of the phase delay of a RF-PWM modulator
629425874Signal generating method and signal generating apparatus
639425834Trajectory modification technique for polar transmitter
649425796Data converting device, digital transmitting apparatus using the data converting device, and related data converting method
659419744Polarization multiplexing optical transmitter and operation control method
669419657Hybrid I/Q and polar transmitter
679418259Tag transmission apparatus and signal transmitting method thereof
689413572Method of converting an optical communications signal and an optical receiver
699413419Phase-optimized constant envelope transmission (POCET) method, apparatus and system
709407486Method and apparatus for generating signal in wireless communication system
719407483Communication using continuous-phase modulated signals
729407203Combined amplitude-time and phase modulation
739402251Enhanced physical downlink control channel scrambling and demodulation reference signal sequence generation
749385903Rhombic-QPSK modulation for improved tolerance to nonlinearity in fiber communication systems
759385902Apparatus and method for transmitting tag
769385832Methodology and method and apparatus for signaling with capacity optimized constellations
779385816Methods and arrangements for frequency shift communications by undersampling
789379863Method for signaling information by modifying modulation constellations
799379798Modulation circuit for a radio device and a method thereof
809374261Signal modulator and signal modulating method
819369321Increasing sensor data carrying capability of phase generated carriers
829369316Digital demodulation method and system
839369261Circuit for baseband harmonic rejection
849363129Method and a device for decoding differentially modulated symbols
859357437Methods and arrangements for communications in low power wireless networks
869356813Capacity for narrow-band hybrid modulation
879356703High-speed low-jitter communication system
889356646Chirp spread spectrum system and method
899351319Wireless communication system, wireless communication apparatus, wireless communication method, and computer program
909350582OFDM or OFDMA signaling for ranging and data
919350489FEC frame header design for cable television signals
929349029Transmission apparatus for a wireless device
939344311Wireless transmission
949344270Phase detection and correction for non-continuous local oscillator generator
959344171Transmission method, transmission device, reception method, and reception device
969337888Method for radio transmission by ultra wideband transmission
979337874High-speed digital signal processing systems
989332541Methods and devices for transmission of signals in a telecommunication system
999331726Method for locating defective points in a high frequency (HF) signal transmission path
1009325551Removal of irrelevance in phase-modulated digital carrier-signals
1019325549Converter unit for an M-order digital modulation and a method thereof
1029319212Fingerprint authenticated touchsceeen contolled cascaded 3G-OFDM mobile systems
1039313076Antenna modulation method applicable to wireless transmitter and transmitter using the same
1049306783Selective activation of VAMOS-2 mode
1059306498Current driven floating driver circuit
1069300518Pulse radar device and control method therefor
1079300513Signal transmission device adjusting electrical characteristic value corresponding to logic level and signal transmitting method thereof
1089300508High data rate milllimeter wave radio on a chip
1099298199Voltage generating circuit and polar transmitter
1109294941Phase transformation of repeated signals
1119294196Method for processing data in an optical network element and optical network element
1129288841Direct digital frequency generation using time and amplitude
1139281977Apparatus and method for separating two phase-modulated signals having different amplitudes
1149281976Transmitter and method of transmitting
1159276800Single frequency synthesizer based FDD transceiver
1169276790Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications
1179270429Method for signaling information by modifying modulation constellations
1189270381Method and apparatus for transmitting and receiving coherent optical OFDM
1199270377High-speed optical transceiver for infiniband and ethernet
1209264877Modems for mobile internet and cellular systems
1219264147Method and apparatus for phase shift keyed optical communications
1229264144Transmission and reception of quad-subcarrier orthogonal frequency division multiplexed signals
1239246722Device for providing a differential output signal and method for providing a differential output signal
1249246717Optimized receivers for faster than nyquist (FTN) transmission rates in high spectral efficiency satellite systems
1259244126Automated test system with event detection capability
1269240920Wireless transmitter for multi-mode concurrent transmission of signals complying with different communication standards
1279231805Device for carrier phase recovery
1289231523Modulating device and modulation method

2015

1299225576Resilient channel and broadcast modulation
1309225575Precoding for single transmission streams in multiple antenna systems
1319225565Device for generating a vector-modulated output signal and method for generating a vector-modulated output signal
1329225562Digital wideband closed loop phase modulator with modulation gain calibration
1339210005Apparatus and method for generating differential signal, and transmission apparatus and method having the same
1349209852Modular microwave backhaul outdoor unit
1359203519Pair-wise symbol correlated high receiver sensitivity modulation format
1369198188Operating a wireless system in an unlicensed band
1379198144Power supply adjustment and polar modulation in a MIMO system
1389197470Data transmission via multi-path channels using orthogonal multi-frequency signals with differential phase shift keying modulation
1399197282Phase-optimized constant envelope transmission (POCET) method, apparatus and system
1409197258System and method for generating a data dependent clock for a DAC in a modulator
1419197164RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments
1429197163Systems, and methods of RF power transmission, modulation, and amplification, including embodiments for output stage protection
1439191004Signal converting device and digital transmitting apparatus applying the signal converting device
1449184963Transmitting device, receiving device and communication method for an OFDM communication system with new preamble structure
1459184962Distributed antenna system for MIMO signals
1469178735Phase-modulated on-off keying for millimeter wave spectrum control
1479178734Communications transmitter having high-efficiency combination modulator
1489178731Transmission apparatus for a wireless device using delta-sigma modulation
1499172447Method and apparatus for transceiving data in a MIMO system
1509166617Communication unit, digital band-pass sigma-delta modulator and method therefor
1519160602Method of improving performance in a hierarchical modulation system
1529160489Origin dodging for transmitted signal
1539160402Transmission method, transmitter, reception method, and receiver
1549154350PHY layer options for body area network (BAN) devices
1559154348Systems and methods for improving communication sensitivity
1569148323Transmitter
1579143239Signal processing device, signal processing method, and communication device
1589143088Control modules
1599137069Systems and methods to frequency shift unwanted signal components
1609137068Wireless communications device having temporary correlation matrix with time inversion and related methods
1619137067High efficiency outphasing transmitter for electronically scanned arrays
1629137066Method and apparatus for generating a metric for use in one or more of lock detection, SNR estimation, and modulation classification
1639136948Electrical modulator driver circuit for generating multi-level drive signals for QAM optical transmission
1649136825Method and device for implementing tracking filters and RF front end of software defined radios
1659130806Wideband phase modulation methods and apparatus
1669130805Phase detector
1679130679Polarization-switched differential ternary phase-shift keying
1689130610Transmission apparatus and transmission method
1699124267Digital transmitter and method for calibrating digital transmitter
1709118319Reconfigurable circuit block supporting different interconnection configurations for rate-conversion circuit and processing circuit and related method thereof
1719112754Techniques for generating bit log-likelihood ratios in communication systems using differential modulation
1729112753Interleaver design and header structure for ITU G.hnem
1739106501Quadrature power amplifier having increased efficiency
1749106486Transmission apparatus, reception apparatus and digital radio communication method
1759100250Pre-phase error correction
1769100127Digital light path labeling system with dual polarization quaternary phase-shift keying modulation
1779100125Frame formatting for high rate optical communications
1789100119Apparatus and method for multiport amplification in communication system
1799094255Method and device for amplitude modulation of an electromagnetic signal emitted by a contactless transceiver system
1809094131Signal generating method and apparatus
1819094113Apparatus and method for reducing phase noise in near field communication device signaling
1829094004Transmitter system with digital phase rotator used for applying digital phase rotation to constellation data and related signal transmission method thereof
1839083508Method and apparatus for data transmission using multiple transmit antennas
1849077602Systems and methods for fast and precise frequency estimation
1859077391Transmitter front-end device for generating output signals on basis of polyphase modulation
1869071494Systems and methods for fast and precise frequency estimation
1879065708Apparatus and method of transmitting preamble having additional information in differential modulation packet data communication
1889065707Polarization-independent LCOS device
1899059889Polar multi-symbol delay detector for carrier phase and frequency recovery for coherent transmission
1909059790Ultra-wide band communication apparatus and method
1919054925Parallel digital-to-time converter architecture
1929042486Sideband suppression in angle modulated signals
1939031165Efficient signal processing for receive and transmit DBF arrays
1949019031Method for the phase modulation of a carrier signal transmitted from a transmitter to a contactless transponder, and device for implementing same
1959008151Transmission method, transmitter, reception method, and receiver
1969001948Pulse shaping in a communication system
1979001931Method and device for digital modulation with low transition density
1989001930Dual-stream signal (SIG) field encoding with higher order modulation
1999001929Method and apparatus for transmitting symbol repeatedly in wireless communication system
2009000858Ultra-wide band frequency modulator
2018976901Phase shift keying transmitter circuit
2028948308Apparatus and method of transmitting hierarchically modulated signal

2014

2038923439Complementary signal mixing
2048923438Dual rate communication
2058885769Signal generation method and signal generation device
2068885768Low-loss, broad band, LC I/Q phase shifter
2078867663OFDM signal transmission method and apparatus
2088861644Devices of IQ mismatch calibration, and methods thereof
2098860522Phase and amplitude modulator
2108817912Phase-rotated tone-grouping modulation
2118798203Signal processing apparatus and signal processing method
2128797111Poly-phase filter, and a single-side band mixer including the same
2138787498Systems and methods for enhanced carrier suppression
2148774318Method and apparatus for constant envelope modulation
2158766738Decomposer and amplifier
2168750411Method and apparatus for reducing transmitter interference
2178744006Transmit diversity for pre-coded radio control signals
2188731098Multiple gigahertz clock-data alignment scheme
2198724739Variable phase shifter-attenuator
2208723613Wideband phase modulator
2218718191Method and apparatus for transmitting/receiving data in wireless communication system
2228718190Receiver/transmitter capable of simultaneously receiving/transmitting discontinuous frequency signals and method thereof
2238717116Method and apparatus for modifying a characteristic of a complex-valued signal
2248705658Method and apparatus of modulating signal in broadcasting and communication system
2258675774Constellation rearrangement for transmit diversity schemes
2268654888Precoder circuit
2278644420Alignment of in-phase and quadrature data in quadrature phase shift keying optical transmitters
2288638880Radio base station and user equipment and methods therein

2013

2298610514Full spectrum modulator for digital television signals
2308605824Radio communication apparatus and radio communication method
2318598959Modulation apparatus, phase setting method and test apparatus
2328594228Apparatus and method of differential IQ frequency up-conversion
2338594227Measurement of system time delay
2348594226Method for processing a digital signal in a digital delta-sigma modulator, and digital delta-sigma modulator therefor
2358588338Driver circuit for driving a power amplifier
2368588337Vector modulator
2378571135Method, system and apparatus for balanced frequency up-conversion of a baseband signal
2388565348Radio transmitting apparatus
2398558631Resilient channel and broadcast modulation
2408553627Transmission diversity scheme on physical uplink control channel (PUCCH) with ACK/NACK differentiation
2418542773Digital RF converter, digital RF modulator and transmitter including the same
2428494083Transmitting/receiving system and method of processing broadcast signal in transmitting/receiving system
2438488718Correction of distortions in an emission chain
2448476985Method and arrangement for generating a frequency-modulated signal
2458451934Method and system for increasing throughput of a wireless channel using multipath transmission
2468428183In-phase and quadrature pattern alignment for quadrature phase shift keying optical transmitters
2478422589Method and apparatus for transmitting data in a digital communication system, and computer-readable storage medium relating thereto
2488411795High power high linearity digital phase shifter
2498391412PN long code shift for access attempt
2508391411Wireless communication apparatus and wireless communication method
2518391410Methods and apparatus for configuring a pilot symbol in a wireless communication system
2528378465Method and apparatus for optical modulation
2538369451Method and apparatus for constant envelope modulation
2548358719Method and device for the compensation of signal errors in IQ-modulators
2558355465Driver circuit for driving a power amplifier

2012

2568331799Non-feedback pre-encoder for optical DQPSK modulation
2578331490Methods and apparatus for conditioning communications signals based on detection of high-frequency events in polar domain
2588325827Transmitting device, receiving device and communication method for an OFDM communication system with new preamble structure
2598319569Quadrature amplitude modulator and quadrature amplitude modulation method
2608306133Transmitter and method for configuring transmission frame
2618299865Quadrature modulator and semiconductor integrated circuit with it built-in
2628290086Efficient outphasing transmitter
2638289096Wide band polar modulator
2648275070Apparatus and method of transmitting/receiving signals using signaling point rotation at mutual cooperation transmission
2658270511Methodology and method and appartus for signaling with capacity optimized constellations
2668269569Test apparatus for digital modulated signal
2678259850UWB transmission apparatus and UWB transmission method
2688259840Data communication via a voice channel of a wireless communication network using discontinuities
2698249193Reference signal sequence representation in wireless communication device
2708249192Techniques to transmit data rate control signals for multi-carrier wireless systems
2718218680Radio communication apparatus capable of switching modulation schemes
2728213537Apparatuses, systems, and methods for reducing spurious emissions resulting from carrier leakage
2738198949Digital modulator
2748170143Method and transmitting device for encoding data in a differential space-time block code
2758160178Transmitter
2768154357Modulation for amplitude-modulating a signal
2778139677Method for selecting constellation rotation angles for quasi-orthogonal space-time and space-frequency block coding
2788139655System and method for effectively transferring electronic information
2798111777Method, apparatus and system for high-speed transmission on fiber optic channel
2808107556OFDM signal transmission method and apparatus
2818098764Millimeter wave radio with phase modulation
2828090041Systems and methods for forward link closed loop beamforming

2011

2838085108Digital polar radio frequency transmitting device with a radiofrequency reference oscillator and an integrated circuit comprising such device
2848077797Method, system, and apparatus for balanced frequency up-conversion of a baseband signal
2858064541Hyper phase shift keying modulation
2868044742Wideband phase modulator
2878036310Transmitter and receiver
2888036309Method and transmitter structure reducing ambiguity by repetition rearrangement in the symbol domain
2898036304Apparatus and method of differential IQ frequency up-conversion
2908036301Radio transmitter with reduced power consumption
2918031028Polar signal processor to drive a segmented power amplifier and method therefore
2928022782Two-point phase modulator and method of calibrating conversion gain of the same
2938018295Modulation device and pulse wave generation device
2948014468Energy detection receiver for UWB
2958014462Apparatus for performing alternating quadratures differential binary phase shift keying modulation and demodulation
2968008981Multi-phase ultra-wideband signal generator using differential pulse oscillators and array thereof
2977999629IQ-modulation
2987983235High speed overlay mode for burst data and real time streaming (audio) applications
2997965793Method for reducing ambiguity levels of transmitted symbols
3007961815Methods and systems for transmission of multiple modulated signals over wireless networks
3017953177Radio communication apparatus capable of switching modulation schemes
3027933359Polar transmitter for increasing modulation rate using multi-phase generator
3037929640High speed differential encoder and interleaver
3047928813Transient noise control for digital RF modulation
3057915997System and method for remote activation with interleaved modulation protocol
3067915970Bi-phase modulator apparatus and method
3077915969Distortion compensating circuit
3087912378Modulating a signal using a fractional phase modulator
3097902937Positive coefficient weighted quadrature modulation method and apparatus
3107893758Quadrature modulator and calibration method
3117885354System and method for enhancing near vertical incidence skywave ("NVIS") communication using space-time coding
3127876855Phase modulation power spreading used to reduce RF or microwave transmitter output power spur levels
3137872545Jumpless phase modulation in a polar modulation environment
3147872543Bi-polar modulator
3157864882Method and apparatus for generating constant envelope modulation using a quadrature transmitter

2010

3167860402Modulating a signal according to 2.sup.n-PSK modulation
3177860188Digital modulator for a GSM/GPRS/EDGE wireless polar RF transmitter
3187835459System and method for adapting to a change in constellation density while receiving a signal
3197830983Method to minimize degradation in a D-MPSK hierarchical modulation system
3207830217Method and system of vector signal generator with direct RF signal synthesis and parallel signal processing
3217822149Method to enable single frequency network optimization
3227804377Apparatus and method for producing an SBPSK-type modulated signal using piecewise linear phase transition shaping
3237787565System and method for performing baseband phase shifting in a Cartesian feedback system
3247778356Modulator and method for producing a modulated signal
3257773688Method, system, and apparatus for balanced frequency up-conversion, including circuitry to directly couple the outputs of multiple transistors
3267772936Polar feedback architecture
3277756215Radio communication base station apparatus and radio communication method in multi-carrier communications
3287751497Method to minimize compatibility error in hierarchical modulation using variable phase
3297750749Switching circuit, and a modulator, demodulator or mixer including such a circuit
3307746186Wideband quadrature imbalance compensation system and method
3317738590Radio communication apparatus capable of switching modulation schemes
3327737799Digital phase modulator and corresponding method
3337733193Systems and methods for DQPSK modulator control using selectively inserted dither tone
3347729410Procedure for BPSK demodulation corresponding to BPSK modulation with reduced envelope peaking
3357711064Method for digital wireless communications
3367702034Parallel processing for programmable wideband digital modulation
3377701306Error correction signal generating device and orthogonal modulator equipped with the error correction signal generating device
3387693235Reduced complexity coding system using iterative decoding
3397693230Apparatus and method of differential IQ frequency up-conversion
3407692507Apparatus and method of generating a plurality of synchronized radio frequency signals
3417684514Transmitter apparatus and wireless communication apparatus
3427680213Generating higher order modulation using QPSK modulations
3437671692Apparatus and method for compensating carrier feedthrough in quadrature modulation system
3447656966Method to increase performance of secondary data in a heirarchial modulation scheme
3457643574Transmitting apparatus and method in transmit diversity system

2009

3467630456Method and/or apparatus to efficiently transmit broadband service content using low density parity code based coded modulation
3477630455Apparatus and method for digital wireless communication
3487630453Multi-level modulation method and system
3497627058Alternating quadratures differential binary phase shift keying modulation and demodulation method
3507623000Hybrid linear and polar modulation apparatus
3517620124Direct conversion receiver and receiving method
3527612627Integrated binary phase shift keying with silicon MEMS resonators
3537599446Modulation and demodulation based on hierarchical modulation
3547596187Digital modulation circuit and method as well as digital demodulation circuit and method
3557595702Modulation apparatus capable of correcting non-linearity of voltage controlled oscillator
3567586994Interface apparatus and method for data recovery and synchronization
3577586293Digital modulation circuit
3587579921On-off keying-7-phase shift keying modulation system and method for fiber communication
3597564923Frequency offset and method of offsetting
3607555061Optical communication device
3617551904Apparatus and method for high efficiency power amplification for a mobile communication system
3627539271System and method for multi-band ultra-wide band signal generators
3637535310Distortion compensation circuit
3647518460Amplitude modulation apparatus, amplitude limiting method, and computer-readable program
3657518459Harmonic-rejection modulation device
3667515651Parallel processing for programmable wideband digital modulation
3677512188Phase shift keying signaling for integrated circuits

2008

3687469022Methods and apparatus for symmetrical phase-shift keying
3697463693Apparatus and method for full-diversity, full-rate space-time block coding for two transmit antennas
3707463108Active 90-degree phase shifter with LC-type emitter degeneration and quadrature modulator IC using the same
3717436902Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation
3727430252Apparatus and method for WGIO phase modulation
3737424065Apparatus and method for ultra narrow band wireless communications
3747412006Method and apparatus for RF carrier feedthrough suppression
3757409013Super-orthogonal space-time trellis codes, and applications thereof
3767409012Modulator and signaling method
3777406134Very high data rate up-conversion in FPGAs
3787397865Systems and methods of using IQ modulation for calibration or measurement
3797362824Modulation method and radio communication system
3807359457Transmission apparatus, reception apparatus and digital radio communication method
3817359452Systems and methods for designing a high-precision narrowband digital filter for use in a communications system with high spectral efficiency
3827356093Enhanced wireless communication system and method thereof
3837352797Procedure for BPSK modulation with reduced envelope peaking
3847349491Frequency shaping stream signal processor
3857336728Method and apparatus for monitoring phase-shift keyed optical signals
3867333571Reduced complexity coding system using iterative decoding
3877319716Transmitter image suppression in TDD transceivers
3887315582Backward compatible DVB-S standard transmission system

2007

3897298797Transmitter and receiver provided in wireless communication system using four transmitting antennas
3907280613Method to inject hierarchical data onto single carrier stream
3917280608Real time dynamic correlator
3927277480System and method of equalization of high speed signals
3937274754Method and apparatus for frequency division multiplexing
3947274753Method of implementing modulation and modulator
3957269229Reduced memory architecture for edge modulator
3967260156Modulation identification device
3977248647Radio telecommunications system operative by interactive determination of soft estimates, and a corresponding method
3987248646Digital reconfigurable core for multi-mode base-band transmitter
3997242726Parallel concatenated code with soft-in soft-out interactive turbo decoder
4007236543Method and apparatus of 8PSK modulation
4017233617System and method of equalization of high speed signals
4027230998Method to increase performance of secondary data in a hierarchical modulation scheme
4037224237Modulator and correction method thereof
4047212585Quadrature modulation transmitter
4057206356Wireless transmitter with reduced power consumption
4067197087System and method for differential IQ delay compensation in a communications system utilizing adaptive AQM compensation
4077187728Coding method and use of a receiver with a convolutional decoder
4087180960Phase error corrector and method
4097177371Methods and apparatus for transmitting and receiving data over a communications network in the presence of interference
4107177368Data transfer using frequency notching of radio-frequency signals
4117173979Method and device for transmitting information symbols using a plurality of carriers and method and device for receiving information symbols
4127167527System and method for multi-symbol interfacing
4137164729Differential transmitter diversity technique for wireless communications
4147161979Digital filter for IQ-generation, noise shaping and neighbor channel suppression

2006

4157154960Method of determining the capacity of each transmitter antenna in a multiple input/multiple output (MIMO) wireless system
4167142613Methods, systems and devices for generating pulse shapes
4177136427Method and apparatus for adaptive modulation using space-time block code matrix
4187133462Method and apparatus for determining modulation scheme for retransmission in a communication system
4197133461Stream transmission method and device
4207130358Method and apparatus for rearranging codeword sequence in a communication system
4217120204Waveform generator operable in accordance with a plurality of band limitation characteristics
4227120202Wireless communication apparatus
4237116725Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems
4247106807Method for estimating the frequency shift of a CPFSK signal
4257103110Dual phase pulse modulation encoder circuit
4267099401Discrete multitone interleaver
4277098754Fractional-N offset phase locked loop
4287095801Phase adjustable polyphase filters
4297095795Multi-rate transmission apparatus
4307092453Automatic method for power control and phy mode switching control in adaptive phy mode systems
4317085331Apparatus and method for processing data using COPSK of wireless communication system
4327079589Serial digital communication superimposed on a digital signal over a single wire
4337072418Method and apparatus for performing Nyquist folding frequency modulation
4347072416Transmitting/receiving device and transmitting/receiving method
4357068728Carrierless backwards compatible data neworking transmitter, receiver, and signal format
4367065156Hopped delay diversity for multiple antenna transmission
4377065153High speed monolithic microwave integrated circuit (MMIC) quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM) modulators
4387061989Fully digital transmitter including a digital band-pass sigma-delta modulator
4397061341System for highly linear phase modulation
4407058137Phase shifters for peak-to-average power ratio reduction in multi-carrier communication systems
4417054383Method for the determination of the average long-term power of digital modulated signal
4427054382Modulator of phase shift keying (PSK) type
4437054381Apparatus for TFCI mapping in wireless communication mobile station and method thereof
4447046618Bridged ultra-wideband communication method and apparatus
4457042960Low order spur cancellation mixer topologies
4467042957Method and communication system for transmitting information with the aid of a multicarrier method
4477039122Method and apparatus for generating a composite signal
4487031403Phase shift keying modulation including a data converter for converting an input data signal having 3 bits long into two ternary converted data signals
4497031397Communication system with reduced power variation and method therefor
4507027525Digital transmission method for bandwidth and bit rate flexibility
4517020216Method for adjusting a phase angle of a phase modifier of a transmitting device
4527012968Apparatus for detecting and adjusting transmission power of CDMA system
4537003050Radio transmitter, radio receiver, and multilevel modulation communication system
4546996191Efficient accurate controller for envelope feedforward power amplifiers
4556993085Encoding and decoding methods and devices and systems using them

2005

4566963622Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes
4576959054Filter bank and receiver for processing continuous phase modulated signals
4586956910Fast transmitter based on table lookup
4596952456Ultra wide band transmitter
4606952445Symbol constellations having second-order statistics with cyclostationary phase
4616940920Multiplier arrangement, signal modulator and transmitter
4626940840Apparatus for adaptive reverse power control for spread-spectrum communications
4636928121Digital transmitter with constrained envelope and spectral regrowth over a plurality of carriers
4646928101FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
4656925133Apparatus and method for M-ary demodulation in a digital communication system
4666909337Noncoherent pulse position and phase shift keying transmission/reception system and a transmission/reception signal processing method therefor
4676898257Transmitter device having a modulation closed loop
4686891445Phase modulator
4696888898Random code for device identification
4706885652Code division multiple access (CDMA) communication system
4716885322Apparatus and method for transmitter phase shift compensation
4726882679Extension of wireless local area network communication system to accommodate higher data rates while preserving legacy receiver features
4736873661.pi./4 QPSK modulator
4746873645Automatic power control system for a code division multiple access (CDMA) communications system
4756873218Frequency modulator using a waveform generator
4766868126Modulating a digital signal with narrow spectrum and substantially constant envelope
4776845083Multi-standard transmitter system and method for a wireless communication system

2004

4786831905Spread spectrum system assigning information signals to message-code signals
4796829317Signalling method in a radio communication system, and transmitters, receivers and repeaters for implementing the method
4806826389Transmitter and method of generating a transmission signal
4816826237Radio transmitter
4826819708OCQPSK modulator and modulating method using 1-bit input FIR filter
4836816473Method for adaptive forward power control for spread-spectrum communications
4846804311Diversity detection for WCDMA
4856801516Spread-spectrum system for assigning information signals having different data rates
4866798844Correction of phase and amplitude imbalance of I/Q modulator
4876788662Method for adaptive reverse power control for spread-spectrum communications
4886774740System for highly linear phase modulation
4896771711Digital GMSK filter
4906760393Spread-spectrum GMSK/M-ary radio with oscillator frequency correction
4916754474Radio transmission system
4926754287Method and apparatus for producing a modulated signal
4936748021Cellular radio communications system
4946744825Method and system for quadrature modulation and digital-to-analog conversion
4956744809Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
4966738359Communication format control method and apparatus
4976731693System of and method for compensating a baseband signal to reduce third order modulation distortion
4986724851FIR chip for use in a wireless subscriber unit
4996724269PSK transmitter and correlator receiver for UWB communications system
5006721369Composite BPSK/AM-BPSK based spectral suppression of out-of-band energy from saturated RF amplifier
5016721301Centroid tracking for spread-spectrum communications
5026714607Joint demodulation using a viterbi equalizer having an adaptive total number of states
5036711218System and method for received signal decoding
5046707857Reference signal pre-distortion for transmitter with frequency synthesizer based phase encoding
5056707805Method for initial power control for spread-spectrum communications
5066700928Tetrahedron modem
5076700449Saw oscillation circuit
5086697350Adaptive vector correlator for spread-spectrum communications
5096693969Phase-locked loop methods and structures for generating modulated communication signals with nonconstant envelopes
5106683917Base band signal processing circuit capable of improving both noise characteristic and distortion characteristic
5116680981.pi./4 shift QPSK modulator and communication device
5126674812High IF frequencies with a lower frequency logic based FSK modulation selecting a harmonic alias and demodulation using sub-sampling techniques
5136674791Automatic power control system for a code division multiple access (CDMA) communications system
5146674788Automatic power control system for a code division multiple access (CDMA) communications system

2003

5156668024Radiofrequency transmitter with a high degree of integration and possibly with self-calibrating image deletion
5166654426Correction of nonlinearity of I/Q modulator
5176650695Wireless digital data transmission from a passive transceiver
5186633600Traffic lights in a code division multiple access (CDMA) modem
5196631169Apparatus and method for GMSK baseband modulation based on a reference phase to be simplified
5206628727Apparatus and method for performing .pi./4-DQPSK baseband modulation based on a signal mapping to be simplified
5216621945Modulation scheme for NRZ signals and transmitter
5226621874Method and radio station for data transmission
5236611567Method and apparatus for pulse shaping
5246608669Quadrature processed LIDAR system
5256606357Carrier injecting waveform-based modulation scheme for reducing satellite transponder power requirements and earth terminal antenna size
5266600382Microwave phase modulator
5276587516Subscriber unit producing a modulated digital frequency
5286560296Method and apparatus for modulating digital data
5296553080Constant envelope modulation communication system
5306549590Current-controlled carrier tracking filter for improved spurious signal suppression
5316549564Random access in a mobile telecommunications system
5326546261Method and apparatus for configuring communication apparatus in accordance with communication services and protocols
5336539131Optical MSK modulator
5346539064Multiple data rate filtered modulation system for digital data
5356535561Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals and DC offset compensation
5366529559Reduced soft output information packet selection
5376522687Data transmitter and receiver of a DS-CDMA communication system
5386519279Transceiver circuitry, portable communication device and method for performing radio communication
5396515526Phase fluctuation generation
5406512798Digital communication system of orthogonal modulation type

2002

5416496542Digital communication system
5426487242Method and apparatus for VCO modulation in a communication system
5436480553Gaussian frequency-shift keying transciever for ISM wideband communication
5446473469Local communication system and apparatus for use therein
5456459742Digital modulation process and modulator implementing the process
5466456668QPSK modulated backscatter system
5476456608Adaptive vector correlator using weighting signals for spread-spectrum communications
5486449317Digital synthesizer
5496445749FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA, and CSMA
5506445746IS-136+ slot formation
5516438176Digital gaussian frequency shift keying modulator
5526434204Method and system for DC offset correction of a quadrature modulated RF signal
55364341992N-QAM macrocell
5546430232Phase constellation modulator
5556430212Spread-spectrum GMSK/M-ary radio
5566424682BPSK encoder circuit
5576421379Digital filter with adaptive coefficients
5586420940Transmitter with a phase modulator and a phase locked loop
5596415002Phase and amplitude modulation of baseband signals
5606396884Automatic frequency control circuit
5616396880.pi./4 DQPSK encoder and modulator
5626396869Modulation apparatus and method using zero-crossing detection
5636392493Fractional-N frequency synthesizer
5646389081Signal transmission equipment
5656385256Method and arrangement for signal modulation
5666385233Unbalanced quadrature waveform
5676381288Method and apparatus for recovering data from a differential phase shift keyed signal
5686381264Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
5696373903Apparatus and method for increasing the effective data rate in communication systems utilizing phase modulation
5706373901Method and apparatus for conditioning modulated signals using window expansion
5716373880Frequency modulation circuit
5726370204Method and apparatus for performing digital fractional minimum shift key modulation for a very small aperture terminal
5736362701Digital communications modulator having an interpolator upstream of a linearizer and method therefor
5746359936Modulator employing a memory reduction circuit
5756359523Orthogonal modulator, mobile terminal and communication system
5766347233Digital waveform generator apparatus and method therefor
5776345173Frequency modulator
5786342821Device capable of QPSK modulation and phase compensator for the same
5796341023Multiple level modulation in a wavelength-division multiplexing (WDM) systems
5806337606Digital communications modulator having a modulation processor which supports high data rates

2001

5816320900Methods and arrangements for transmitting high speed data over reduced bandwidth communication resources
5826317452Method and apparatus for wireless spread spectrum communication with preamble sounding gap
5836307894Power amplification using a direct-upconverting quadrature mixer topology
5846307441Shape modulation transmit loop with digital frequency control and method for same
5856301310Efficient implementation for systems using CEOQPSK
5866301295AM modulated wave eliminating circuit
5876298099Constant envelope modulation communication system
5886295473Digital delay line receiver for use with an implantable medical device
5896295273Phase modulation multiplexing transmission unit and phase modulation multiplexing method
5906289056Broadband multicarrier modulator and corresponding programming method
5916288619Bias circuit for use in quadrature modulator
5926285251Amplification systems and methods using fixed and modulated power supply voltages and buck-boost control
5936282228Spread spectrum codes for use in communication
5946272168Code sequence generator in a CDMA modem
5956271950Optical differential phase shift keying transmission system having multiplexing, routing and add/replace capabilities
5966259747IQ modulator, and associated method
5976255912Phase lock loop used as up converter and for reducing phase noise of an output signal
5986246715Data transmitter and receiver of a DS-CDMA communication system
5996243422Waveform shaping method and equipment
6006242990Quadrature phase shift keyed/bi-phase shift keyed modulator
6016240142Quadrature modulator and demodulator
6026239666Uniform amplitude modulator
6036233293Current-controlled carrier tracking filter for improved spurious signal suppression
6046232843Plural coupled microwave oscillators providing phase shifted output signals
6056229843Pilot adaptive vector correlator
6066225935Biphase-encoded signal processing employing passive and/or semi-passive transistor circuits
6076219374Structure of a coherent dual channel QPSK transceiver using pilot symbols in a code division multiple access system
6086215778Bearer channel modification system for a code division multiple access (CDMA) communication system
6096212174Capacity management method for a code division multiple access (CDM) communication system
6106208698Quadrature modulator imbalance estimator and modulator stage using it
6116205170Transmission/reception unit with bidirectional equalization
6126201452Systems and methods for converting a stream of complex numbers into a modulated radio power signal
6136201451MSK modulator and MSK modulation method of transmitting data at high speed and digital signal generator suitable for MSK modulation
6146194977State variable-based table-driven modulation signal generation
6156185259Transmitter/receiver for GMSK and offset-QAM
6166181674Method and apparatus for sharing transmit shaping filters among phase shifted signals
6176175599Method and apparatus for transmitting and receiving digital data over a bandpass channel

2000

6186167096Transmitting circuit for use in code-division multiple access system and frequency-division multiple access system
6196163231Millimeter wave modulator and transmitter
6206163230Phase-shift keying electronic circuit with distributed structure
6216157619Code division multiple access (CDMA) communication system
6226151366Method and apparatus for modulating signals
6236148040Precoded gaussian minimum shift keying carrier tracking loop
6246148022NRZ and biphase-L formatted quadriphase modulated GPS transmission method
6256147563Coupled cavity oscillator producing output signals with a constant phase difference
6266141389Digital tuner
6276137826Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals
6286125266Dual band architectures for mobile stations having transmitter linearization feedback
6296118827Apparatus for providing increased data rates within existing modulation systems
6306115428Apparatus for and method of generating .pi.-/N-shifted N-differential encoded phase shift keying modulation signals
6316101225Method and apparatus for performing a modulation
6326100827Modulation systems and methods that compensate for DC offset introduced by the digital-to-analog converter and/or the low pass filter thereof
6336097765Method and apparatus for performing digital fractional minimum shift key modulation for a very small aperture terminal
6346097259Modulator and modulation method for orthogonally modulating digital baseband signals
6356091789Method and device for phase modulated signals
6366091780Transmitting and receiving radio signals
6376091303Method and apparatus for reducing oscillator noise by noise-feedforward
6386084921Transmit method and system for Ka band transmissions
6396081550Method of testing clock paths and network elements for carrying out the method
6406078629Digital synthesizer
6416078628Non-linear constant envelope modulator and transmit architecture
6426075827DQPSK mapping circuit
6436072785Differential PSK signalling in CDMA networks
6446072770Method and system providing unified DPSK-PSK signalling for CDMA-based satellite communications
6456069537Double mode modulator
6466052701Methods of performing interpolation using frequency shifting operations and filters
6476047029Post-filtered delta sigma for controlling a phase locked loop modulator
6486046643Radio-frequency signal generator
6496034999Burst signal transmitter capable of producing correct transmission output in initial burst signal
6506031865Rapidly decorrelating spreading sequences for DS-CDMA transceivers
6516028493Elimination of bandpass filter after quadrature modulator in modulation synthesizer circuit
6526025758Method and apparatus for performing digital data signal modulation
6536014065Multi-phase modulator having automatic compensators for offsets of orthogonal adjustment

1999

6546008703Digital compensation for wideband modulation of a phase locked loop frequency synthesizer
6555999570Transmission apparatus, sending apparatus, and receiving apparatus, and transmission method
6565999297Method of putting binary data on an optical carrier wave, and a transmission system using the method
6575995541Method and apparatus for self-calibration and testing of ZPSK transmitter/receiver IC's
6585991332Adaptive matched filter and vector correlator for a code division multiple access (CDMA) modem
6595991329Automatic power control system for a code division multiple access (CDMA) communications system
6605990755Phase modulator efficiently utilizing waveform storing section
6615987072Phase modulation scheme and apparatus
6625986512.SIGMA.-.DELTA. modulator-controlled phase-locked-loop circuit
6635986483Direct digital frequency systhesizer
6645978823Methods and apparatus for implementing and controlling a digital modulator
6655978420Methods and apparatus for implementing a digital modulator
6665963586Method and apparatus for parallel noncoherent correlation of a spread spectrum signal
6675953379Current-controlled carrier tracking filter for improved spurious signal suppression
6685953370Apparatus for receiving and correlating a spread spectrum signal
6695949826Data transmission and reception system
6705946356Method and apparatus for data transmission within a broad-band communications system
6715943345AM multiplexing broadcast apparatus
6725942955Quasi-GMSK modulator
6735933465Control signal detection method with calibration error and subscriber unit therewith
6745930303Digital modulation employing single sideband with suppressed carrier
6755930299Digital modulator with compensation and method therefor
6765923223Transmission system in which either an in-phase or quadrature component of a transmitted signal is delayed prior to modulation
6775920237Constant envelope quadrature-quadrature amplitude modulation system
6785912919Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
6795903609Transmission system using transmitter with phase modulator and frequency multiplier
6805901179Waveform shaping method and equipment
6815896421Use of low pass filter and equalizer for noise reduction in direct up-conversion schemes
6825894249Digital and analog modulator in a simplified circuit structure
6835892798Modulated clock MSK modulator for high data rate applications
6845890057Modulation signal calibration between modem and radio using loopback
6855883922FSK communication device for digital information
6865881109Pulse shaping filter for .pi./4-shift QPSK modulator
6875881100Method and apparatus for coherent correlation of a spread spectrum signal
6885878335Composite direct digital synthesizer
6895875213GMSK communication device test system
6905867537Balanced tranversal I,Q filters for quadrature modulators
6915867072Biphase modulator with balun design
6925864492Randomized digital waveshape samples from a look up table
6935859869Low cost binary phase shift keying modulation transmitter system
6945856998Method and apparatus for correlating a continuous phase modulated spread spectrum signal

1998

6955854813Multiple access up converter/modulator and method
6965847622Quadrature phase shift keying modulating apparatus
6975847619Method and system for calibrating a quadrature phase modulator
6985844449Gilbert cell phase modulator having two outputs combined in a balun
6995838797Secure communication by encryption/decryption of vector at PSK modulation/detection stage
7005838727Method and apparatus for transmitting and receiving digital data over a bandpass channel
7015838208Modulation of transmission data signal in sychronous with transmission clock signal
7025834986Direct 2nd derivative synthesis method for controlling sidelobe energy in an MSK modulated signal
7035834985Digital continuous phase modulation for a DDS-driven phase locked loop
7045832028Method and apparatus for coherent serial correlation of a spread spectrum signal
7055832022Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals
7065831488Digital phase modulator formed with a fixed-point digital signal processor
7075825820Waveform shaping method and equipment
7085825257GMSK modulator formed of PLL to which continuous phase modulated signal is applied
7095822366Transceiver and method for generating and processing complex I/Q-signals
7105822362Sinusoidal phase modulation method and system
7115818867QPSK/QBL-MSK waveform enhancement
7125815537Wireless digital communication device, and a pulse shaping network
7135815531Transmitter for encoded data bits
7145812612Method and apparatus for transmitting an intermittent signal in a ratio communication system
7155812605Multi-channel digital transceiver and method
7165812604Constant envelope continuous phase frequency shift key modulation apparatus and method at radio frequencies
7175812184Transmission of frame-to-frame reversed polarity signals in a two-way cable TV conversion system
7185805640Method and apparatus for conditioning modulated signals for digital communications
7195802104Method and apparatus for vector modulation in a communication system
7205799010Code division multiple access (CDMA) communication system
7215796783Digital transmission system
7225796782Digital modulator with Root-Nyquist filter
7235796780Coherent modulation of CPM signals
7245796776Code sequence generator in a CDMA modem
7255793800Method and apparatus for minimizing phase error in a transmitter section of a transceiver
7265784413Direct digital synthesis frequency-agile QPSK modulator
7275784412Transmitter and method for transmitting a modulated wave with variable envelope
7285784402FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
7295783974Digital interpolation up sampling circuit and digital modulator using same
7305778027Method and apparatus for determining signal components using digital signal processing
7315771442Dual mode transmitter
7325768317Equalization filter compensating for distortion in a surface acoustic wave device
7335764113Re-sampling circuit and modulator using same
7345764094Level shift circuit for analog signal and signal waveform generator including the same
7355757847Method and apparatus for decoding a phase encoded signal
7365754585Method and apparatus for serial noncoherent correlation of a spread spectrum signal
7375754584Non-coherent spread-spectrum continuous-phase modulation communication system
7385751198Angular modulator with a phase variation divided and integrated
7395748687Spreading code sequence acquisition system and method that allows fast acquisition in code division multiple access (CDMA) systems
7405748679Modulated clock MSK modulator for high data rate applications
7415745527Encoding method for constellation symbols of an RF transmitter
7425745526Radio transmitters and methods of operation
7435745523Multi-mode signal processing
7445736840Phase shifter and communication system using the phase shifter
7455729182Device for continuous phase modulation by frequency synthesizer with phase-locked loop
7465727023Apparatus for and method of speech digitizing
7475705945Synthesizable architecture for all-digital minimal jitter frequency synthesizer

1997

7485701106Method and modulator for modulating digital signal to higher frequency analog signal
7495696795Offset quadrature phase shift keyed modulation circuit
7505696794Method and apparatus for conditioning digitally modulated signals using channel symbol adjustment
7515692007Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation
7525680417Method and apparatus for providing biphase modulation
7535680414Synchronization apparatus and method for spread spectrum receiver
7545663691Estimator for estimating an operating defect in a quadrature modulator, and a modulation stage using the estimator
7555659574Multi-bit correlation of continuous phase modulated signals
7565657356Control signal detection method with calibration error and subscriber unit therewith
7575657326Radio based collision detection for wireless communication system
7585652552Phase modulator
7595650714Orthogonal signal generation system
7605648982Spread spectrum transmitter
7615646962Apparatus for reducing electromagnetic radiation from a differentially driven transmission line used for high data rate communication in a computerized tomography system
7625644602Direct digital frequency synthesizer for use in a subscriber unit of a wireless digital communication system
7635638405Dual-mode baseband controller for radio-frequency interfaces relating to digital cordless telephones
7645633893Digital modulation method with controlled envelope variation
7655629961Transmitter apparatus for mobile satellite communication terminal having an envelope equalizer
7665629956Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal
7675629655Integrated distributed RC low-pass filters
7685628059DC offset circuit for cartesian loop
7695627856Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators
7705627499Digital modulator and upconverter having single-bit delta-sigma data converters
7715610940Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal
7725604770PI/4 DQPSK modulation with coarse mapper precession and fine filter precession
7735600676Modulation scheme with low envelope variation for mobile radio by constraining a maximum modulus of a differential phase angle
7745598437Multichannel frequency and phase variable radio frequency simulator
7755596361Two-way cable TV conversion system for data transmission over a dedicated frequency band

1996

7765590155Equipment for generating a transmit signal from first and second digital signals
7775589872Compatible interactive TV and multimedia delivery system two-way cable TV conversion system for data transmission over a dedicated frequency band
7785574409Apparatus and method for adjusting microwave BPSK modulator and mixer
7795561401Quadrature modulator operable in quasi-microwave band of digital communication system
7805559475Frequency synthesizer for synthesizing signals of a variety of frequencies by cross modulation
7815557641Charge-coupled-device based transmitters and receivers
7825550579Two-way cable tv conversion system
7835548541Finite impulse response filter for modulator in digital data transmission system
7845546428Differentially encoding quadrature phase shift keying modulation method and apparatus thereof
7855541953Data transmission method and apparatus for use in low BW:R.sub.s applications
7865535247Frequency modifier for a transmitter
7875530722Quadrature modulator with integrated distributed RC filters
7885528631.pi./4 shifted DQPSK modulator
7895523726Digital quadriphase-shift keying modulator
7905512865Digital oversampled quadrature modulator
7915506546Method and apparatus for generating transmitting wave
7925504465Microwave modulator having adjustable couplers
7935504461High speed slotline BPSK modulator
7945502745BPSK modulator for a digital signal transmitter
7955495504Signal generating apparatus
7965491457F-modulation amplification
7975483554Modulator especially for digital cellular telephone system
7985483549Receiver having for charge-coupled-device based receiver signal processing
7995481231Lumped element four port coupler

1995

8005473280Modulation/demodulation method and system for realizing quadrature modulation/demodulation technique used in digital mobile radio system with complex signal processing
8015471499Minimum shift keyed saw device and method
8025467373Digital frequency and phase modulator for radio transmission
8035463355Wideband vector modulator which combines outputs of a plurality of QPSK modulators
8045455544Low power consumption binary phase-shift-keyed (BPSK) modulator using reflective electronic switching techniques
8055455543Low power consumption binary phase shift keyed (BPSK) modulator using absorptive electronic switching techniques
8065446760Programmable digital pulse shaping phase modulator
8075446466Radio beacon phase modulator
8085444420Numerically controlled phase lock loop synthesizer/modulator and method
8095444415Modulation and demodulation of plural channels using analog and digital components
8105432483Digital quadrature modulator and method for testing the same
8115430415Modulator capable of decreasing consumption of electric power
8125428643Method of, and transmitter for, transmitting a digital signal
8135428320Biphase modulator and method without matching elements
8145425055Digital radio modulator
8155418819Transmitting apparatus and receiving apparatus based on phase modulation method
8165416803Process for digital transmission and direct conversion receiver
8175412352Modulator having direct digital synthesis for broadband RF transmission
8185412351Quadrature local oscillator network
8195406584Time shift keying digital communications system
8205399984Digital frequency generation device
8215382924Continuous phase frequency shift keying modulator
8225379322Baseband signal generator for digital modulator

1994

8235373532.pi./4 quadrature phase shift keying modulator
8245371481Tuning techniques for I/Q channel signals in microwave digital transmission systems
8255369378Digital DQPSK modulator
8265367271Quadrature modulator having phase shift and amplitude compensation circuits
8275363410Modulation circuit for a digital radio communications apparatus using a phase shifted DQPSK modulation system
8285361047PI/4 shift QPSK modulator and communication apparatus used therewith
8295351016Adaptively self-correcting modulation system and method
8305325396Subscriber unit for wireless digital subscriber communication system
8315321514Interactive television and data transmission system
8325319676Digital pre-modulation filter
8335319675Quadrature modulation circuit
8345317276Phase shifter
8355303412Composite direct digital synthesizer
8365295160Apparatus for FM-modulation of digital signals
8375293407Digital modulator with digital power control circuit
8385289503Method and circuit arrangement for producing a QPSK signal on which a carrier signal is superposed
8395285479Quadrature modulation circuit

1993

8405265120Binary phase shift keying modulation system and/or frequency multiplier
8415260673.pi./4 differential encoding for digital cellular mobile systems
8425255086Method and apparatus for RF data transfer in a CATV system
8435251324Method and apparatus for generating and collecting viewing statistics for remote terminals in a cable television system
8445247542QPSK power amplifier distortion correction system
8455237324System and method for producing baseband analog modulation signals
8465235619Cable television radio frequency subscriber data transmission apparatus and RF return method
8475235612Method and apparatus for cancelling spread-spectrum noise
8485228043Direct modulation phase shift keying (DM-PSK) transmission system
8495225902Automatic frequency selection in a bi-directional cable television system
8505225795Digital quadrature modulator
8515222104Gain control circuit for radio transmitter
8525222103Differential quadrature phase shift keying encoder for subcarrier systems
8535216391MSK modulator having a digital quadrature reference waveform generator
8545214396Method and apparatus for providing a biphase modulated signal having flat envelope characteristics without a direct current component
8555210775.pi./4 shift QPSK modulator and communication apparatus
8565193222System for interrupting a transmitter output wave
8575191597Method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter
8585187721Frequency shift keying modulator
8595185765High speed data communication system using phase shift key coding
8605177604Interactive television and data transmission system

1992

8615175514Digital modulator and baseband signal generator for digital modulator
8625173924Method for equalizing received burst signal
8635157693Digital modulation circuit
8645155590System for data channel level control
8655155454MSK modulator using a VCO to produce MSK signals
8665148128RF digital phase shift modulators
8675148127Biphase shift keying modulation circuit having constant envelope characteristics
8685146473Subscriber unit for wireless digital subscriber communication system
8695142690Cable television radio frequency data processor
8705140613Baseband modulation system with improved ROM-based digital filter
8715140540Delay equalization emulation for high speed phase modulated direct digital synthesis
8725126698Phase modulator operated in saturation and with small angle modulation
8735121412All-digital quadrature modulator
8745119396Binary phase shift keying modulation system
8755111155Distortion compensation means and method
8765105435Method and apparatus for cancelling spread-spectrum noise
8775093637Modulation device with input signal modification for correction of amplifier nonlinearities
8785090026GMSK narrowband modem

1991

8795077757System for synthesizing a modulated signal
8805073901Method for correcting waveform data in digital signal modulation and base band signal generator using data provided by this method
8815073331Modulation method for use in a semiconductor laser and an apparatus therefor
8825063361Serrodyne modulator
8835050176Direct modulation phase-shift-keying system and method
8845049839Biphase modulaton circuit having continuous phase changes
8855048058MSK modulation and differentially coherent detection transmission system
8865045816Binary phase shift key modulator with programmable level control
8875040194Method and apparatus for providing for automatic gain control of incoming signals in a modem
8885039959Phase switching circuit
8895030928Zero crossing modulator
8905027372Differential phase shift keying modulator
8915022054Digital GMSK modulator with non-integer bit interval handling
8925020079Apparatus for generating a minimum-shift-keying signal
8935020076Hybrid modulation apparatus
8945020075Direct sequence spread spectrum modulation apparatus
8955014285Frequency shift keying communication system with selectable carrier frequencies
8965008900Subscriber unit for wireless digital subscriber communication system
8975008898Carrier modulating device for a spread spectrum communication device
8984999590Four state phase shift modulator, in particular for amplitude modulation of two carriers in quadrature with a large number of states
8994990867Modulator

1990

9004972440Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals
9014962510Phase modulated system with phase domain filtering
9024961206Data modem system
9034940954Unbalanced quadrature PSK modulator-limiter
9044937840Circuit for pulsed biphase digital modulation
9054932038Phase modulator circuit
9064930141Multi-phase PSK modulation apparatus
9074926441Phase-shift-keying transmitter
9084914613Frequency synthesis method and a synthesizer apparatus using this method
9094910474Method and apparatus for generating phase and amplitude modulated signals
9104908840PSK modulation with an error correction memory
9114905256Method and device for multistate modulation and demodulation with adjustable protection level
9124904963Staggered quadrature phase shift keyed laser modulator
9134897620Continuous phase shift modulation system with improved spectrum control
9144896123Quadraphase modulator
9154894841Digital direct-sequence spread-spectrum modem

1989

9164890302Circuit for extracting carrier signals
9174882552Coherent frequency exchange keying modulator
9184876737Satellite data transmission and receiving station
9194873500Phase accumulation continuous phase modulator
9204868864Autocorrelating 2400 bps handshake sequence detector
9214856025Method of digital signal transmission
9224849703Method and apparatus for generating a data sampling clock locked to a baud clock contained in a data signal
9234843615CPFSK communication system employing nyquist-filtered modulator/demodulator
9244843352Modulator for generating a burst-like modulated wave
9254841547Digital communication system
9264837786Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying
9274829542PSK modem system having improved demodulation reliability
9284821261Packet transmission of digital signals over a high capacity channel, particularly over a satellite broadcasting channel
9294817116Digital radio communication system utilizing quadrature modulated carrier waves
9304812786Method and system for providing precise multi-function modulation
9314808937Phase-locked loop for a modem
9324807252Digital communication system
9334807251PSK modem system with improved demodulation reliability

1988

9344764940Modem for RF subscriber telephone system
9354761798Baseband phase modulator apparatus employing digital techniques
9364761751Method and apparatus for generating digital signals representing periodic samples of a sine wave
9374756008Digitized quadrature phase shift keying modulator
9384750192Method for transmitting digital data by means of continuous phase modulation
9394750036Interactive television and data transmission system
9404748641Suppressed carrier modulation method
9414745628Symbol generator for phase modulated system
9424742532High speed binary data communication system
9434736170Unbalanced quarternary PSK modulator using unbalanced quadrature coupler
9444730344Quadrature-quadrature phase shift keying with constant envelope
9454726039Constant amplitude PSK modulator
9464726038Digital communication system

1987

9474700364FSK with continuous phase and continuous slope at bit transitions
9484700363Data communication method and apparatus
9494691318Data transmission system with error correcting data encoding
9504686688Arrangement for generating an angle-modulated carrier signal of a constant amplitude in response to data signals
9514686490Digital data modulator and digital-to-analog converter
9524682118Phase shift keying and phase modulation transmission system
9534680777Quadrature-quadrature phase shift keying
9544680556Digital modulation apparatus
9554672634Arrangement for generating an angle-modulated carrier signal of constant amplitude in response to data signals
9564659999Direct frequency synthesizer which is step-wise variable and has phase continuity and phase reproducibility when switching frequencies
9574656647Pulsed bi-phase digital modulator system
9584656646Serial minimum shift-keyed modem
9594652838Phase randomization to reduce detectability of phase or frequency-modulated digital signals
9604648099Digital minimum shift keyed modulator
9614646323Method and system for digital data transmission
9624644561Modem for RF subscriber telephone system

1986

9634628286Digital frequency modulator
9644625318Frequency modulated message transmission
9654617535PSK digital echo modulator with reduced memory capacity required
9664613976Constant envelope offset QPSK modulator
9674601048Serial minimum shift-keyed modem
9684599583Mixed dual frequency generating system
9694592071Recovery of carrier and clock frequencies in a phase or amplitude state modulation and coherent demodulation digital transmission system
9704584540Digital direct modulator with type of modulation selection
9714581749Data frequency modulator with deviation control
9724580277Digital-based phase shift keying modulator
9734575858PSK modulation by temporarily increasing frequency to achieve phase change
9744573166Digital modem with plural microprocessors
9754571731PSK modem filter switch
9764567602Correlated signal processor
9774565980PSK Modulator with preset amplitude and phase corrections for each phase

1985

9784562415Universal ultra-precision PSK modulator with time multiplexed modes of varying modulation types
9794559634PSK Modem having dual-integrator voltage controlled oscillator
9804555792Transmitter for transmitting an FSK-modulated signal
9814550292Automatic oscillator frequency control system
9824539533Digital MSK modulator
9834538282Integrated circuit PSK modem phase locked loop
9844531221Premodulation filter for generating a generalized tamed frequency modulated signal
9854527275Correlation data communications system
9864525846Modem in-band secondary channel via radial modulation
9874519083Bilateral digital data transmission system
9884516087Method for reducing side-lobe energy in an MSK detectable signal
9894511862Programmable multitone DPSK modulator
9904509171Modem multiplexer synchronization by radial modulation
9914504802Digital PSK modulator for modem
9924503545System for evaluating transmission line impairments
9934500856Simplified minimum shift keying modulator
9944499585Method and apparatus for producing a shaped spectrum modulating signal

1984

9954481658FM-broadcasting system with transmitter identification by binary phase-modulated, differentially coded code signal
9964481640Spread spectrum modem
9974479099Multiple phase modulator for N sets of digital data
9984477916Transmitter for angle-modulated signals
9994453257Spectrum shaping microwave digital modulators
10004438413Serial minimum shift keyed modulator including notch and bandpass filters
10014435824Communication system having improved differential phase shift keying modulation
10024426711Process for the transmission of service signals for a digital radio beam, as well as transmitter and receiver for using such a process
10034426710Processes for generating duo-binary FSK, tamed FSK and TFM modulations and modulators applying those processes

1983

10044417219Phase displacement modulator
10054377791Phase displacement modulator having four quadrant phases

1982

10064355401Radio transmitter/receiver for digital and analog communications system
10074346472Method and apparatus for eliminating double bit errosion in a differential phase shift keying system
10084338579Frequency shift offset quadrature modulation and demodulation
10094327439Method for generating modem transmission signals with quadrature amplitude modulation
10104320499System for multi-level data transmission by means of an angle-modulated carrier having a constant amplitude
10114320361Amplitude and frequency modulators using a switchable component controlled by data signals
10124311971Apparatus for generating constant-envelope, angle-modulated pulse signals

1981

10134307464Method and apparatus for synthesizing a modulated carrier to reduced interchannel interference in a digital communication system
10144302844Carrier transmission through harmonic polluted medium
10154302842Digital radio repeater with regenerator
10164297641Serrodyning system employing an adjustable phase shifting circuit
10174261053PSK Modulator with reduced adjacent channel interference
10184244047Multiplexed carrier transmission through harmonic polluted medium

1980

10194236248Transmission speed switching system
10204229821System for data transmission by means of an angle-modulated carrier of constant amplitude
10214216542Method and apparatus for quadriphase-shift-key and linear phase modulation
10224213094Poly-phase modulation systems
10234210879Four-phase staggered shift keying modulator system
10244206423Digitized phase modulating means

1979

10254180793PSK pulse synthesizer
10264179672Phase modulation system for combining carrier wave segments containing selected phase transitions
10274176328DC coupled bi-phase modulator
10284174505Directional PSK modulation and demodulation system
102941683978-Phase PSK modulator
10304149121Four phase to two phase correlator

1978

10314130802Unidirectional phase shift keyed communication system
10324121050Differential tri-phase shift keyed modulation
10334109101Correlative converter between a 2.sup.n -ary code sequence and a 2.sup.n+1 -phase carrier pulse sequence
10344109100Reverberation compensating communication system
10354105863Arrangement for combining data symbols in accordance with a predetermined weighting function
10364100369Device for numerically generating a wave which is phase modulated and which is free from unwanted modulation products
10374088967Split-ring digital phase modulator
10384087677Digital PSK modem
10394083009High reliability diversity communications system
10404070638Nonlinear surface acoustic wave PSK encoder/correlator
10414068198Phase-locked loop frequency shift key modulator

1977

10424063197Plural transistor oscillator phase continuous frequency encoder circuit
10434063196Plural oscillator phase continuous frequency encoder
10444049909Digital modulator
10454041391Pseudo noise code and data transmission method and apparatus
10464028641Linear phase modulator including a pair of Armstrong modulators
10474021758Direct modulation 4 phase PSK modulator
10484021757Phase lock-loop modulator using an arithmetic synthesizer
10494013960Quadraphase modulator
10504011407Narrow-band eight-phase modem
10514008373Digital differential phase shift keyed modulator
10524006416Digital communication system

1976

10533993868Minimum shift keying communication system
10543991611Digital telemetering system for subsurface instrumentation
10553988540Integrated circuit modem with a memory storage device for generating a modulated carrier signal
10563983546Phase-to-pulse conversion circuits incorporating Josephson devices and superconducting interconnection circuitry
10573980945Digital communications system with immunity to frequency selective fading
10583978406Code error detecting system in digital code transmission
10593973201PSK modulator with reduced spectrum occupancy
10603969590Surface acoustic wave apparatus
10613943285Multiplexed data modem
10623942136Time multiplex electron beam with modulating means
10633938045Transmitter for frequency shift keyed modulation
10643937882Full-duplex communication system on a two wire line
10653935386Apparatus for synthesizing phase-modulated carrier wave
10663931472Asynchronous quadriphase communications system and method
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017