СПИСОК патентов США - подгруппа МПК16 H04L27/38


Выделить слова в названиях патентов:


№ п/п Номер патента Название патента

2017

19608695Communication system
29608682Interference reduction for multiple signals
39608672Apparatus and method for generating base band receive signals
49602326Apparatus and method for transmitting signal, apparatus and method for receiving signal
59602242Coherent reception with noisy channel state information
69602238Decoding method and apparatus
79596118FBMC receiver using a method for synchronization in a frequency domain
89590833Reception of 2-subcarriers coherent orthogonal frequency division multiplexed signals
99578447High speed overlay mode for burst data and real time streaming (audio) applications
109577865Carrier recovery aided by pilot symbols carrying information
119577786Pilot symbol generation for highly-spectrally-efficient communications
129577689Apparatus and methods for wide bandwidth analog-to-digital conversion of quadrature receive signals
139571326Method and apparatus for high-speed data transfer employing self-synchronizing quadrature amplitude modulation
149571314Systems and methods for joint demodulation and demapping
159571308High speed transceiver
169571131Signal generating method and signal generating device
179564993Method and apparatus for soft demapping in rotated quadrature amplitude modulation (QAM) based communication system
189564976Blind equalization of dual subcarrier OFDM signals
199559876Adaptive equalization processing circuit and adaptive equalization processing method
209553695Likelihood generation circuit and likelihood generation method
219553621Apparatus and methods for signal generation, reception, and self-calibration
229548882Spectral stitching method to increase instantaneous bandwidth in vector signal analyzers
239544168Channel estimation device, receiving device, channel estimation method, channel estimation program, and recording medium
249544008Integrated circuit

2016

259531577Bit-likelihood calculating apparatus and bit-likelihood calculating method
269521022Cycle-slip detection method and apparatus, and receiver
279520834Quadrature mixer arrangement
289509545Space and latency-efficient HSDPA receiver using a symbol de-interleaver
299509362Method and apparatus for handling modified constellation mapping using a soft demapper
309509355Calibration of quadrature imbalance via loopback phase shifts
319509352Phase-noise cancellation apparatus and method
329504066One or multiple bit restricted access window (RAW) end point determination for single user, multiple user, multiple access, and/or MIMO wireless communications
339503993Method and apparatus for controlling power at base station in a communication system
349503290Diversity reception device, diversity reception method, reception program, and recording medium
359491641IQ imbalance image compensation in multi-carrier wireless communication systems
369491030Phase rotation correcting method and phase rotation correcting apparatus
379491029Devices and methods for reducing signal distortion in I/Q modulation transceivers
389491028Phase synchronization of modulation or demodulation for QAM-based multiband TSV-link
399491018Carrier phase and amplitude estimation for phase shift keying using pilots and data
409485033Signal processing apparatus and signal processing method
419484975Modular microwave backhaul outdoor unit
429479140Complex-pole load offering concurrent image rejection and channel selection
439473337Carrier recovery in a QAM receiver
449467251Method and system for forward error correction decoding with parity check for use in low complexity highly-spectrally efficient communications
459467180Communication apparatus and communication method
469461866Method, apparatus and system for sending physical layer signal
479461865Apparatus and method for demodulating hybrid modulation symbol in wireless communication system using hybrid modulation scheme
489461864Apparatus and method for adaptively selecting channel code based on non-gaussianity of channel in wireless communication system
499461678Calculation of voltage standing wave ratio in radio device
509444673Methods and systems for down-converting a signal using a complementary transistor structure
519438464System and method for IQ imbalance estimation
529438463System for the correction of amplitude and phase errors of in-quadrature signals, corresponding receiver and method
539438462Soft bit un-uniform quantization method, apparatus, computer program and storage medium
549438377LLR computation device and error correction decoding device
559431962Coefficient estimation for digital IQ calibration
569426016Self track scheme for multi frequency band serializer de-serializer I/O circuits
579426015Apparatus and method for symbol mapping in wireless communication system using multi tone frequency quadrature amplitude modulation
589413584Blind phase-shift keying (PSK) and quadrature amplitude modulation (QAM) identification
599413582Method and apparatus for transmitting and receiving
609413572Method of converting an optical communications signal and an optical receiver
619413300Front-end matching amplifier
629413294Apparatus and method for correcting IQ imbalance
639391739Efficient demapping of constellations
649385890Methods and systems for programmable digital down-conversion
659374260Method and apparatus for directly detected optical transmission systems based on carrierless amplitude-phase modulation
669374149Receiver circuit and reception method
679369320Communication system having cross polarization interference cancellation (XPIC)
689369318Scalable serial/de-serial I/O for chip-to-chip connection based on multi-frequency QAM scheme
699369316Digital demodulation method and system
709369264Method and apparatus of algorithm for coherent receivers with M-QAM modulation format
719369235Maximizing data rate by adjusting codes and code rates
729363130Dynamic digital predistortion for a microwave radio system
739363112Systems and methods for equalization in radio frequency signal paths
749363053Integrated circuit
759363040Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal
769362865Demodulation device, demodulation method and program
779357341Receiver for backscatter communication
789356757Wireless communication device capable of scanning for available base stations using reduced bandwidth
799356734Transmitter, receiver, and signal processing method thereof
809356703High-speed low-jitter communication system
819350591Method and system for down-converting an electromagnetic signal
829350457Power-efficient maximum likelihood decoding for 5 bits per dual-pol-symbol modulation
839344302Loopback technique for IQ imbalance estimation for calibration in OFDM systems
849344181Beamforming devices and methods
859338668Gain control for intra-band carrier aggregation
869337965Systems and methods for asynchronous re-modulation with adaptive I/Q adjustment
879331886Magnetic field data modem
889325557Radio communication apparatus and pulse signal transmission method in radio communication apparatus
899325436Systems and methods for adaptive polarization transmission
909319262Methods and systems for down-converting a signal
919319182Near maximum likelihood spatial multiplexing receiver
929313079Circuits, systems, and methods for managing automatic gain control in quadrature signal paths of a receiver
939313059Data-modulated pilots for phase and gain detectors
949306792Methods and systems for down-converting a signal
959306791Method for designing an amplitude and phase shift keying constellation
969306782Systems and methods for narrowband signal quadrature error correction
979306540IF-noise-shaping transistorized current-mode lowpass filter utilizing cross coupled transistors
989300518Pulse radar device and control method therefor
999300514OFDM generation apparatus in a multi-carrier data transmission system
1009300336Direct conversion receiver device with first and second stages and related methods
1019288100Method and system for down-converting and electromagnetic signal
1029281989Compensation apparatus, signal generator and wireless communication equipment
1039281830Radio apparatus
1049276800Single frequency synthesizer based FDD transceiver
1059270545Signal monitoring platform
1069270513Method and apparatus for algorithm on flexible square-QAM coherent detection
1079270502Digital RF receiver
1089270416Multi-mode transmitter for highly-spectrally-efficient communications
1099270390Frequency and phase offset compensation of modulated signals with symbol timing recovery
1109264282Polar receiver signal processing apparatus and methods
1119264281Wireless communication receiver with I/Q imbalance estimation and correction techniques
1129264280Automatic received gain control
1139264279Transmitter, receiver, and method for receiving and transmitting a radio frequency signal
1149264179Decision feedback equalizer for highly spectrally efficient communications
1159264156Technique for calibrating a receiver apparatus
1169253009High performance station
1179252919Method and device for demodulating reliable and residual data
1189252865Interference reduction for multiple signals
1199252822Adaptive non-linear model for highly-spectrally-efficient communications
1209246737Method and system for down-converting an electromagnetic signal
1219246736Method and system for down-converting an electromagnetic signal
1229246724Method and apparatus for performing soft demapping in rotated quadrature amplitude modulation (QAM) based communication system
1239244126Automated test system with event detection capability
1249240920Wireless transmitter for multi-mode concurrent transmission of signals complying with different communication standards
1259240918Method, devices and computer program product for modulation and demodulation delivering OFDM/OQAM symbols
1269237055ZigBee receiver exploiting an RF-to-BB current-reuse blixer and hybrid filter topology
1279231813Communications faster than Shannon rate
1289231805Device for carrier phase recovery
1299231794Method and apparatus for multiple antenna communications, computer program product therefor
1309231715I/Q mismatch compensation method and apparatus
1319231634Compensation apparatus and wireless communication equipment
1329231628Low-complexity, highly-spectrally-efficient communications

2015

1339225578High order modulation method, demapping method, and corresponding device
1349222962Automatic gain control apparatus, automatic gain control method, and receiver
1359215102Hypotheses generation based on multidimensional slicing
1369210026Correction of imbalances in a complex intermediate frequency mixer
1379210025Method and apparatus for correcting in-phase signal and quadrature-phase signal
1389209852Modular microwave backhaul outdoor unit
1399209843Fine phase estimation for highly spectrally efficient communications
1409209826Radio frequency circuit
1419203682Frequency-dependent I/Q-signal imbalance correction coherent optical transceivers
1429203681Method and apparatus for performing soft demapping in rotated quadrature amplitude modulation (QAM) based communication system
1439203680Forward error correction decoder input computation in multi-carrier communications system
1449203666IQ mismatch compensation
1459203664Measurement of intermodulation products of digital signals
1469203511Feed-forward carrier phase recovery for optical communications
1479197263Compensation apparatus, signal generator and wireless communication equipment
1489197159Mixer
1499184976Method and system for I/Q mismatch calibration and compensation for wideband communication receivers
1509184975Methods and apparatus for wideband imbalance compensation
1519184953Programmable signal processing circuit and method of demodulating via a demapping instruction
1529184945Method for compensating the frequency dependent phase imbalance
1539178825Data processing method and apparatus
1549178740Peak-to-average power ratio reduction for QAM modulation with HD radio signals
1559178546Phase-noise cancellation apparatus and method
1569173007Method and system for synchronization for DVB-S2 frame and its associated frame structure
1579172500Signal demodulation method and device
1589167185Transmission and reception apparatus and transmission and reception system
1599166834Method and system for corrupt symbol handling for providing high reliability sequences
1609166833Feed forward equalization for highly-spectrally-efficient communications
1619160590Diversity with a coded signal
1629160586Method and apparatus for estimating and compensating for in-phase and quadrature (IQ) mismatch in a receiver of a wireless communication device
1639160491Receiving apparatus and receiving method
1649160390Method and system for impairment shifting
1659160382Phase noise mitigation for wireless communications
1669154338System and method for IQ imbalance estimation
1679154213Interference reduction for multiple signals
1689148328Digital I/Q imbalance compensation in a quadrature receiver
1699148267Radio communication apparatus and radio communication method
1709148234Technique and test signal for determining signal path properites
1719143377Demapper for rotated QAM constellations
1729143375Iterative-diversity COFDM broadcasting with improved shaping gain
1739143177Technique for automatic gain control
1749137066Method and apparatus for generating a metric for use in one or more of lock detection, SNR estimation, and modulation classification
1759137057Constellation map optimization for highly spectrally efficient communications
1769136979Carrier wave reproduction device and carrier wave reproduction method
1779135108Data processing device and data processing method
1789131511Backoff snooze wake power consumption within single user, multiple user, multiple access, and/or MIMO wireless communications
1799130815Method, receiver, transmitter and communication system for phase error compensation
1809130805Phase detector
1819130795Highly-spectrally-efficient receiver
1829130627Multi-mode receiver for highly-spectrally-efficient communications
1839130626Frequency dependent I/Q impairment compensation
1849124405Receiver and method of receiving
1859118865Receiving device, receiving method, program, and receiving system
1869118535Method and apparatus for configuring a frequency dependent I/Q imbalance compensation filter
1879118439Receiver for imbalanced carriers
1889112762Digital mobile passive leak detection for broadband communication system
1899112595Transmission device, reception device, and radio communication method
1909112515Geographic locating remote endpoint monitor device, system, and methodology thereof
1919106503Method and apparatus for recovering time-domain hybrid modulated QAM signals
1929106502Apparatus, system and method of in-phase/quadrature (I/Q) imbalance compensation
1939106456Adaptive low-complexity channel estimation
1949100243Dynamic Low-IF frequency for interference mitigation
1959100080Digital radios
1969100071Timing pilot generation for highly-spectrally-efficient communications
1979094278Apparatus, method, and system for transmitting and receiving high-speed data in point-to-point fixed wireless communication
1989094253Systems and methods for adaptive blind mode equalization
1999094079System and method for I-Q imbalance correction
2009094022Geographic locating remote endpoint monitor device, system, and methodology thereof
2019088470Signal processing for independently produced signals
2029088469Multi-mode orthogonal frequency division multiplexing receiver for highly-spectrally-efficient communications
2039088404Powerline communication receiver and related methods
2049083471Coherent and self-coherent signal processing techniques
2059077603Controllable frequency offset for inphase and quadrature (IQ) imbalance estimation
2069071497Apparatus and method for modulation classification in wireless communication system
2079071306Transmission apparatus, reception apparatus, communication system, circuit apparatus, communication method, and program
2089065491Adjusting phase imbalance between in-phase (I) and quadrature-phase (Q) signals
2099059889Polar multi-symbol delay detector for carrier phase and frequency recovery for coherent transmission
2109059881Hexagonal constellations and decoding same in digital communication systems
2119054938Quadrature gain and phase imbalance correction
2129054937Envelope extraction with reduced bandwidth for power modulation
2139054871Physical key-protected one time pad
2149054748Reconfigurable wideband receiver
2159014285Receiving apparatus and receiving method
2169008227Radio frequency communication
2178995581Apparatus and method for soft demapping
2188976904Automated erasure slicer threshold control and modification of symbol estimates to be erased

2014

2198908810Systems and methods for implementing soft-decision Reed-Solomon decoding to improve cable modem and cable gateway performance
2208879653Soft-demapping of QAM signals
2218848833Receiver having controller to set local oscillators so as to render interfering signals filterable and associated methods
2228842779Controllable frequency offset for inphase and quadrature (IQ) imbalance estimation
2238842761Methodology and method and apparatus for signaling with capacity optimized constellations
2248804889Receiver with dual clock recovery circuits
2258744084Methods, systems, and computer readable media for scrambled communication of data to, from, or over a medium
2268711955Spreading technique applied to broadband mobile communications by satelite relying on DVB-RCS
2278654915Control signal receiver and communication device having the same

2013

2288548096Controllable frequency offset for inphase and Quadrature (IQ) imbalance estimation
2298428188Carrier phase offset correction for a QAM system
2308369448Bit mapping scheme for an LDPC coded 32APSK system
2318358723Self-configurable radio receiver system and method for use with signals without prior knowledge of signal defining characteristics

2012

2328279911Systems, computer program products, and methods using carrier phases to detect multipath signals
2338270511Methodology and method and appartus for signaling with capacity optimized constellations
2348218680Radio communication apparatus capable of switching modulation schemes
2358149902Methods to relax the second order intercept point of transceivers
2368111765Communication apparatus, communication method, and integrated circuit
2378090060Demodulation technique for GFSK and DPSK
2388090057Robust burst detection and acquisition system and method

2011

2398081695Channel estimation using frequency smoothing
2407920645Data transmissions in a mobile communication system employing diversity and constellation rearrangement of a 16 QAM scheme
2417872544Modulation/demodulation apparatus and modulation/demodulation method

2010

2427801250Low latency analog QAM coherent demodulation algorithm

2009

2437542528Far end crosstalk mitigation in multiple-input multiple-output (MIMO) channels using partial maximum likelihood MIMO-DFE

2008

2447456683Amplitude error compensating device and quadrature skew error compensating device

2007

2457161991Multi-dimensional fractional number of bits modulation scheme

2006

2467142605Method to transfer data without a clock or strobe signal
2477046726Method and apparatus for hybrid decision feedback equalization
2487039131Carrier frequency offset estimation in a wireless communication system
2497031399Demodulator having automatic quadrature control function
2506983028Carrier restoration apparatus and method

2005

2516965656Automatic gain control method and automatic gain control circuit
2526956916Delayed decision feedback sequence estimation diversity receiver
2536954493Modem apparatus, image communication apparatus and communication control method
2546950480Receiver having automatic burst mode I/Q gain and phase balance
2556947497Digital signal receiver and method for receiving digital signal
2566940930Automatic burst mode I/Q gain and I/Q phase calibration using packet based-fixed correction coefficients
2576937684Phase discriminator with a phase compensation circuit
2586928103Rach receiving apparatus
2596928101FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
2606925132Method for detecting and correcting amplitude and phase imbalances between I and Q components in quadrature demodulator
2616922436Method and apparatus for clock timing recovery in .chi.DSL particularly VDSL modems
2626920189Carrier recovery means
2636914934Multiplier-free methods and apparatus for signal processing in a digital communication system
2646907084Method and apparatus for processing modulation symbols for soft input decoders
2656882693Digital signal receiver
2666879646Quadrature amplitude modulation demodulator and receiver
2676870891Low latency for start of initial automatic gain control for data in digital signal processing
2686868263Digital automatic gain control
2696859505Method, apparatus and system for use in determining pilot-to-data power ratio in wireless communication
2706856946Passive impedance network for rotating a phase system
2716853693Method and apparatus for gain normalization of a correlation demodulator
2726850563Data slicer for combined trellis decoding and equalization
2736843597Method and apparatus of a fast two-loop automatic gain control circuit
2746842495Dual mode QAM/VSB receiver
2756842488VSB/QAM receiver and method

2004

2766834088Method and apparatus for calculating bit log-likelihood ratios for QAM signals
2776831578Method and circuit arrangement for demodulation of a quadrature amplitude- or phase-modulated signal
2786826238Quadrature amplitude modulation receiver and carrier recovery method
2796803814Demodulator and method for the demodulation of modulated RF signals
2806792054Method for reducing complex frequency down-conversion impairments
2816785346Complex phase-locked loop demodulator for low-IF and zero-IF radio receivers
2826785342Nonlinear pre-distortion modulator and long loop control
2836782058Device and method for interpolated signal resampling between sampling clock cycles
2846781448Method and apparatus for demodulating data
2856775334Equalization and decision-directed loops with trellis demodulation in high definition TV
2866771720Amplification control scheme for a receiver
2876771714Timing recovery using the pilot signal in high definition TV
2886751275Demodulator and radio communication system using the same
2896751264Receiver and method therefor
2906748203Three port structure with modulated LO signal
2916748026Distortion estimation apparatus, frequency offset compensation apparatus and reception apparatus
2926744827Demodulator arrangement, method to demodulate, and telecommunication system comprising such a demodulator arrangement
2936741645Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
2946738429Decision-directed carrier frequency detector and method for QAM
2956728467Communication system
2966727936NTSC interference rejection filter
2976727772Method and system for synchronizing a quadrature amplitude modulation demodulator
2986724976Communication system
2996714601Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
3006707863Baseband signal carrier recovery of a suppressed carrier modulation signal
3016704353Method and apparatus for tracking the magnitude of channel induced distortion to a transmitted signal
3026693983Method and system for detection of short digital radio messages
3036693970QAM modulator
3046690753Receiver having decisional feedback equalizer with remodulation and related methods
3056687309System for estimating carrier frequencies of quadrature amplitude modulated signals having high symbol rates
3066680985Adaptive quadrature amplitude modulation decoding system
3076678317Adaptive equalizer device and method for controlling adaptive equalizer

2003

3086671342Phase detectors in carrier recovery for offset QAM and VSB
3096671339Lock detecting apparatus and method for multimedia digital broadcasting receiver
3106671336Gain controller for circuit having in-phase and quadrature channels, and method
3116668025Tuning demodulator for digitally modulated RF signals
3126661282Demodulation apparatus and method in a communication system employing 16-ary QAM
3136654593Combined discrete automatic gain control (AGC) and DC estimation
3146650178N-port direct receiver
3156631174Automatic frequency control apparatus
3166608869Dual-carrier heterodyne for separating orthogonal components of complex amplitude-modulation signals
3176603368High data rate vector demodulator
3186597733Equalizer performance enhancements for broadband wireless applications
3196594319Apparatus and method for determining the closest coset points in a trellis decoder
3206580314Demodulation system and method for recovering a signal of interest from a modulated carrier sampled at two times the phase generated carrier frequency
3216577685Programmable digital signal processor for demodulating digital television signals
3226570933Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
3236560294Phase estimation in carrier recovery of phase-modulated signals such as QAM signals
3246560293Apparatus and method for FM remodulation of envelope modulated data signals
3256549716Communication system
3266545532Timing recovery circuit in a QAM demodulator
3276542028System and method for efficient demodulation and filtering of a received signal
3286535566Demodulating method and receiver apparatus
3296535549Method and apparatus for carrier phase tracking
3306516036Method and apparatus for decimating an oversampled signal
3316510188All digital automatic gain control circuit
3326507733Three port junction receiver
3336507625Digital modulator and digital demodulator
3346507619Decoding system and method for digital communications

2002

3356501806Estimation of introduced frequency offset by a signal correction and transmission medium
3366493409Phase detectors in carrier recovery for offset QAM and VSB
3376487254Methods and devices for estimating QAM symbol sequences over flat fading channels using multiple offset sequences
3386483883Automatic gain control type demodulation apparatus having single automatic gain control circuit
3396463106Receiver with adaptive processing
3406452964Adaptive modulation method
3416452376Method of estimating the carrier frequency of a phase-modulated digital signal
3426445749FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA, and CSMA
3436442217Digital communication receiver with digital, IF, I-Q balancer
3446438164Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
3456430214Fading resistant multi-level QAM receiver
3466424683Circuit for demodulating two-dimensional data symbols transmitted by a carrier-based data transmission
3476421394Computer method and apparatus for modem point slicing
3486411659Timing recovery using the pilot signal in high definition TV
3496396881Minimum-delay frequency-shift-compensating complex demodulator with arbitrary phase adjustment
3506392500Rotationally invariant digital communications
3516389083Trellis decoder
3526377639Method, system, and apparatus for unambiguous phase synchronization
3536353639Filter configuration and slope detector for quadrature amplitude modulated signals
3546344871NTSC interference rejection filter
3556339623Reference carrier generator device for pulling a reference carrier out of a false stabilized point into a correct stabilized point of synchronism

2001

3566314141Method for receiving-end automatic identification of a signal at the receiving end, the signal having been transmitted in accordance with the QAM mode, and circuit for carrying out the method
3576310925Phase angle detector and frequency discriminator employing the same
3586310513Demodulator and demodulation method for demodulating quadrature modulation signals
3596292518Use of 64-QAM circuitry for receiving and decoding 8-VSB signals
3606289069Digital filter for rotation correction loop of a QPSK or QAM demodulator
3616289063QAM receiver with improved immunity to crosstalk noise
3626282248Variable baud rate demodulator
3636278746Timing recovery loop circuit in a receiver of a modem
3646278741Timing recovery circuit in QAM modems
3656275548Timing recovery system
3666269118Signal carrier recovery process
3676268767Dual bit error rate estimation in a QAM demodulator
3686263472Apparatus and method for detecting signal points using signal point-mapping
3696259743Automatic constellation phase recovery in blind start-up of a dual mode CAP-QAM receiver
3706256357Communication system
3716252903Blind start-up of a dual mode CAP-QAM receiver
3726249554Power based digital automatic gain control circuit
3736249180Phase noise and additive noise estimation in a QAM demodulator
3746249179Direct digital synthesis in a QAM demodulator
3756240150Method and apparatus for filtering interference in a modem receiver
3766236263Demodulator having cross polarization interference canceling function
3776226333QAM de-mapping circuit
3786226323Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
3796222891Timing recovery using the pilot signal in high definition TV
3806219088NTSC interference rejection filter
3816192085Circuit arrangement with a data sequence generator
3826178209Method of estimating trellis encoded symbols utilizing simplified trellis decoding
3836175726Receiver architecture for the receiving of angle-modulated/angle-keyed carrier signals

2000

3846167095Method and apparatus for variably allocating upstream and downstream communication spectra
3856163685Receiver with controllable amplifier means
3866160443Dual automatic gain control in a QAM demodulator
3876154503Automatic gain control system that responds to baseband signal distortion
3886151313Baseband phase estimation technique for demodulation of overlapping packets
3896148046Blind automatic gain control system for receivers and modems
3906141378Fractionally-spaced adaptively-equalized self-recovering digital receiver for amplitude-phase modulated signals
3916133785False carrier lock receiver and associated methods for detection
3926130577Digital demodulators for phase modulated and amplitude-phase modulated signals
3936128353Code division multiple access system with dynamic histogram control
3946127897Zero-crossing detection type clock recovery circuit operated at symbol rate
3956121828Demodulator
3966115435Soft decision method and receiver
3976115433Adaptively-equalized digital receiver with carrier tracking
3986111922Circuit for detecting word sequences in a modem
3996108375Equalization circuit for unknown QAM constellation size
4006101217System and method for demodulating digital information from an odd constellation
4016097764Pragmatic trellis-coded modulation system and method therefor
4026088402QAM spread spectrum demodulation system
4036088401QAM signal receiver
4046084905Frequency hopped wireless communication system and communication equipment using a preamble field and information transfer field succeeding the preamble field
4056081565Amplitude based coarse automatic gain control circuit
4066049651Communication system
4076046629Method of an apparatus for demodulating amplitude-modulated signals in an amplitude phase shift keying (APSK) system
4086044112Methods and apparatus for correcting amplitude and phase imbalances in demodulators
4096041432Apparatus and method for detecting signal points using signal point-mapping
4106041085Carrier regenerating circuit, multi-level quadrature amplitude demodulator, and method of detecting frequency deviation
4116035005Receiver with baseband I and Q demodulator
4126034564Demodulator using quasi-synchronous detection to demodulate modulated quadrature input signals
4136028475Method and apparatus for demodulating multi-level QAM signal

1999

4146009317Method and apparatus for compensating for imbalances between quadrature signals
4156008692Carrier wave synchronization for multi-level two-dimensional modulation alphabets
4166005897Data communication system and method therefor
4176002729Method for frame synchronization
4186002723Digital receiver having programmable complex threshold detectors and threshold interpreters
4196002721Carrier frequency estimator for a signal receiver
4205999569Communication system
4215991342Frequency error detector
4225987071Digital modulator and digital demodulator
4235987069Method and apparatus for variably allocating upstream and downstream communication spectra
4245987064Eye pattern display method, eye pattern display apparatus, and communications apparatus
4255974100Method and apparatus in a communication receiver for compensating for channel amplitude and phase distortion
4265970093Fractionally-spaced adaptively-equalized self-recovering digital receiver for amplitude-Phase modulated signals
4275966412Apparatus and method for processing a Quadrature Amplitude Modulated (QAM) signal
4285956374Jitter suppressing circuit
4295940450Carrier recovery method and apparatus
4305926507Quotient coding modem
4315926065Digital modulator having a digital filter including low-speed circuit components
4325923651Increasing data throughput in a wireless telecommunications environment
4335920228Digital demodulation with compensation for phase and frequency of tentatively demodulated signal
4345917869Apparatus and method for timing/carrier recovery in bandwidth-efficient communications systems
4355912920Point-to multipoint digital communications system facilitating use of a reduced complexity receiver at each of the multipoint sites
4365907585Digital signal detecting method and detector
4375905405Quadrature demodulation circuit with carrier control loop
4385898737Adaptive digital symbol recovery for amplitude phased keyed digital communication systems
4395896405Apparatus for restoring a digital transmission signal
4405892879Communication system for plural data streams
4415892799Method in connection with a QAM receiver and an improved QAM receiver
4425881107Transmission system for digital signals, and transmitter and receiver therefor
4435878088Digital variable symbol timing recovery system for QAM
4445875215Carrier synchronizing unit
4455872960Integrated circuit having CPU core operable for switching between two independent asynchronous clock sources of different frequencies while the CPU continues executing instructions
4465872812Carrier reproducing circuit including region deciding circuitry
4475870439Satellite receiver tuner chip having reduced digital noise interference
4485867542Clock phase detecting circuit and clock regenerating circuit each arranged in receiving unit of multiplex radio equipment
4495867539Methods and apparatus for reducing the effect of impulse noise on receivers
4505862191Digital communications receiver that includes a timing recovery device
4515861773Circuit for detecting the locked condition of PSK or QAM
4525857004Digital data receiver

1998

4535854570Feedback-free method for the demodulation of higher-level MQAM signals without knowledge of the transmitted symbols
4545850421Method and apparatus for estimating clock slew and carrier translation
4555841814Sampling system for radio frequency receiver
4565832045Method and apparatus for recovering baud timing from correlation of intersymbol interference
4575832040Phase detector
4585825242Modulator/demodulator using baseband filtering
4595819000Magnetic recording and playback apparatus
4605818875Modulation and demodulation method, modulator and demodulator
4615815536Multivalue digital transmission system
4625815535Carrier recovery apparatus
4635812594Method and apparatus for implementing carrierless amplitude/phase encoding in a network
4645809096Digital transmission system comprising decision means for changing the synchronization mode
4655809069Frequency-domain carrierless AM-PM demodulator
4665809046Method and a system for fast adjusting data receiving modem
4675805642Method for detecting differently encoded signal sequences using a recursively computed reference signal
4685802241Communication system
4695802113Clock signal recovery system for communication systems using quadrature amplitude modulation
4705802111Complex constellation point multiplier
4715796787Receiver and method thereof
4725796786Phase error detecting method and phase tracking loop circuit
4735796783Digital transmission system
4745789988Clock recovery circuit for QAM demodulator
4755787125Apparatus for deriving in-phase and quadrature-phase baseband signals from a communication signal
4765787124Quadrature detector and amplitude error correction method for quadrature detector
4775784402FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
4785781589Digital slope detector and method
4795781076Digital quadrature amplitude modulators
4805774512Higher order digital phase loop filter
4815774503Demodulation method and demodulation device
4825774502Fully integrated data receiver and method for receiving on/off keyed AM/PDSK modulated signals
4835771263Communication system control method and communication system using the method
4845764705Adaptive phase shift adjuster for resonator
4855761251Dual automatic gain control and DC offset correction circuit for QAM demodulation
4865761210Signal processing apparatus and method
4875754591System for, and method of, processing quadrature amplitude modulated signals
4885742643Quantizing and decoding of phase-amplitude modulated signals in hexagonal code
4895729577Signal processor with improved efficiency
4905729575Transmitter and receiver system and method utilizing a pilot carrier notch data encoded signal
4915729173Demodulation of quadrature amplitude modulation signals
4925727035Synchronization device for digital communications
4935724396Signal processing system
4945719907Phase jitter extraction circuit and phase jitter cancellation circuit
4955717715Signal processing apparatus and method
4965717706Apparatus and method for detecting signal points using signal point-mapping
4975710785Sequential decoder having short synchronization recovery time
4985705958Apparatus 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

4995703526Circuit for detecting the locked condition of PSK or QAM demodulators
5005696769Decision error correcting method of a digital communication system and the digital communication system for the same
5015692020Signal processing apparatus and method
5025692013Shared resources modulator-demodulator circuits for use with quadrature amplitude modulated signals
5035684842Digital transmission system comprising a receiver which includes a carrier recovery circuit
5045675498Measuring amplitude of sparsely sampled sinusoidal signal
5055673293Method and apparatus for demodulating QAM and VSB signals
5065671253Apparatus for demodulating and decoding video signals encoded in different formats
5075668831Signal processing apparatus and method
5085668749Circuit for performing arithmetic operations in a demodulator
5095666084Multi-level demodulator and VCO circuit
5105661761Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same
5115659583Tone canceller for QAM demodulator
5125657355Signal processor module
5135654982Apparatus and method for determining carrier frequency offset and timing frequency offset for data transmission and reception
5145648988Communication system including a digital roll-off filter
5155644606Receiver with two synchronization loops
5165642369Quick resynchronization receiver for sequential decoding of convolutional codes
5175640417QAM detector which compensates for received symbol distortion induced by a cellular base station
5185636253Method for detecting erasures in received digital data
5195635864Comparator circuit
5205625828Parallel operating CPU core and DSP module for executing sequence of vector DSP code instructions to generate decoded constellation points in QAM/TCM modem application
5215623521Digital gain controller and gain control method
5225613149Integrated data processing system utilizing successive approximation analog to digital conversion and PWM for parallel disconnect
5235608755Method and apparatus for implementing carrierless amplitude/phase encoding in a network
5245606714Integrated data processing system including CPU core and parallel, independently operating DSP module and having multiple operating modes
5255604771System and method for transmitting sound and computer data
5265604768Frequency synchronized bidirectional radio system
5275603017Parallel integrated circuit having DSP module and CPU core operable for switching between two independent asynchronous clock sources while the system continues executing instructions
5285600672Communication system
5295596764Debug mechanism for parallel-operating DSP module and CPU core
5305596608Fading distortion compensation method and circuit
5315596606Synchronous detector and methods for synchronous detection
5325596605Radio receiver for use in the reception of digital multiplexing signals
5335594759Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same
5345594389Carrier regeneration circuit including area judging device
5355594344Method and apparatus for generating and detecting amplitude and phase modulated sensor signals
5365592677Integrated data processing system including CPU core and parallel, independently operating DSP module
5375592513Synchronous modulator and methods for synchronous modulation

1996

5385590357Integrated CPU core and parallel, independently operating DSP module and time-critical core priority scheme
5395572550Decision directed carrier recovery circuit using phase error detector
5405568517Decoding device for performing amplitude-phase demodulation and viterbi decoding
5415550866Digital demodulator reference signal generator having DC blocker and first Hilbert transformation with quadrature output followed by gain staging and combination for second Hilbert transformation quadrature output
5425548617Digital VSB detector with bandpass phase tracker using rader filters, as for use in an HDTV receiver
5435535244Digital modulating/demodulating apparatus and a digital demodulating apparatus
5445533050System for receiving a phase and amplitude modulated digital signal
5455533048Apparatus and method for compensating for limiter induced non-linear distortion in a wireless data communication system
5465528195Selective type quadrature demodulator
5475519879Integrated circuit having CPU and DSP for executing vector lattice propagation instruction and updating values of vector Z in a single instruction cycle
5485519733Method and apparatus for recovering a qam carrier
5495519356Methods and apparatuses for fast decision directed carrier recovery with wide locking range
5505511219Mechanism for implementing vector address pointer registers in system having parallel, on-chip DSP module and CPU core
5515511096Quadrature amplitude modulated data for standard bandwidth television channel
5525509030RF receiver AGC incorporating time domain equalizer circuity
5535507033Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
5545495203Efficient QAM equalizer/demodulator with non-integer sampling
5555491828Integrated data processing system having CPU core and parallel independently operating DSP module utilizing successive approximation analog to digital and PWM for parallel disconnect
5565491457F-modulation amplification
5575487173DTMF detection in an integrated data processing system

1995

5585477199Digital quadrature amplitude and vestigial sideband modulation decoding method and apparatus
5595471508Carrier recovery system using acquisition and tracking modes and automatic carrier-to-noise estimation
5605471396Estimator of amplitude and frequency of a noisy-biased sinusoid from short bursts of samples
5615440589Frequency offset dealing modulator and demodulator apparatus
5625438591Quadrature amplitude modulation type digital radio communication device and method for preventing abnormal synchronization in demodulation system
5635436932For performing amplitude-phase demodulation and viterbi decoding
5645434884Apparatus and method for equalizing for amplitude jitter
5655428644Adaptive detection method and detector for quantized signals
5665418815Receiver adaptively operable for multiple signal transmission systems
5675412693Wholly-digital demodulation system for QAM signalling in low capacity links
5685400366Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same
5695398260Method and apparatus for restoring multi level/phase modulation data
5705386590Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping

1994

5715377232Frequency synchronized bidirectional radio system
5725347569Gain control circuitry for QAM demodulator
5735343499Quadrature amplitude modulation synchronization method
5745321726Calibration of vector demodulator using statistical analysis
5755315619Carrier recovery processor for a QAM television signal
5765315618Apparatus and method of canceling periodic carrier phase jitter
5775311557Circular limiter for use in a receiver to reduce the effects of signal distortion
5785311546Carrier phase recovery for an adaptive equalizer
5795309481Apparatus for adjusting signal points, equalizer coefficients and the like

1993

5805233635Receiving method and receiver for discrete signals
5815230015Method and apparatus for static video telephone transmission/receiving
5825208832Methods and apparatus for detecting repetitive sequences
5835202902Carrier recovery method for modulation having a large number of states, and apparatus for implementing the method

1992

5845173925Demodulating system capable of accurately equalizing received signals using error correction codes
5855170415Burst demodulator for establishing carrier and clock timing from a sequence of alternating symbols
5865150383Asynchronous quadrature demodulator
5875140615Maximal ratio diversity combining technique
5885138272Microwave demodulator for digital radio links using QAM type modulation
5895134634Multilevel quadrature amplitude demodulator capable of compensating for a quadrature phase deviation of a carrier signal pair
5905124861Digital signal magnetic recording and playback apparatus employing quadrature amplitude modulation
5915115454Method and apparatus for carrier synchronization and data detection
5925111483Trellis decoder
5935097487Local oscillator signal generating system for digital demodulator
5945093847Adaptive phase lock loop
5955081653Automatic gain control circuit for multilevel duobinary AM/PSK modulated signals

1991

5965068875Adaptive loop gain phase filter
5975048059Log-polar signal processing
5985005189Detection of digital signals received from multipath channels
5995005186Digital demodulator apparatus
6004993047Volterra linearizer for digital transmission
6014987375Carrier lock detector for a QAM system
6024985900Non-intrusive channel-impairment analyzer

1990

6034980767Technique for determining signal dispersion characteristics in communications systems
6044980648Local oscillator signal phase acquisition system for digital demodulator
6054968955Carrier phase synchronizing circuit capable of recovering carrier phase synchronization at a short time
6064959844Clock recovery circuit for digital demodulator
6074926443Correction circuit for a digital quadrature-signal pair
6084912728Analog-to-digital converter for stepped square QAM demodulators
6094910467Method and apparatus for decoding a quadrature modulated signal
6104905255Decision directed gain control
6114899367Multi-level quadrature amplitude modulator system with fading compensation means

1989

6124881049QAM modulator/demodulator
6134875049Automatic level control circuit for an ad convertor
6144868850MODEM communication system having training means and method for training same
6154866739Digital fast recovery timing algorithm
6164864244Stepped square-QAM demodulator utilizing all signal points to generate control signals
6174860320Method for recovering a control signal for controlling the phase of a local carrier signal
6184859956Validity decision circuit capable of correctly deciding validity of an error signal in a multilevel quadrature amplitude demodulator
6194849996Phase perturbation compensation system
6204847868Non-coherent pattern detection
6214843616Method of obtaining a phase difference signal
6224835483QAM demodulator with rapid resynchronization function
6234831637Apparatus and technique for timing jitter cancellation in a data receiver
6244827431Methods and systems for the simultaneous quantitative measurement of phase and amplitude jitter impairments and signal to noise ratio in a qam data communication channel
6254823361Interference immune digital modulation receiver
6264809300Branch metric algorithm for eight-dimensional signal constellation
6274801899Quadrature amplitude modulation/demodulation device using multi-level digital signals

1988

6284794623Recovery of carrier signal from QAM double sideband suppressed carrier IF signal for use in synchronous demodulation
6294792964Adaptive jitter canceller having sinusoidal accentuator and jitter prediction filter
6304777640Frequency adaptive phase jitter canceler
6314771438Method and apparatus for phase reference recovery in high speed fast turnaround modem
6324764730Radio receiver demodulation system
6334759039Simplified recovery of data signals from quadrature-related carrier signals
6344759036Decision-directed control circuit
6354757266Demodulation system capable of establishing synchronization in a transient state
6364755763Demodulator capable of avoiding abnormal demodulation
6374752943Frequency of occurrence retraining decision circuit
6384751478Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component
6394745625Transition detector
6404737969Spectrally efficient digital modulation method and apparatus
6414736386Carrier out-of-lock detector apparatus
6424730345Vestigial sideband signal decoder
6434727534Timing and carrier recovery in dual polarization communications systems
6444726043Data decision-directed timing and carrier recovery circuits

1987

6454709377Viterbi decoder for wireline modems
6464703282Digital demodulation system
6474697265Error monitor circuit
6484683578Automatic gain control using the extreme points of a constellation
6494672631Radio receiver with variable phase shift correction
6504665532Radio communication system
6514648100Carrier recovery circuit
6524646325Index decoder for digital modems
6534646305High speed data modem using multilevel encoding
6544646173Converting and decoding receiver for digital data recorded in analog form on magnetic tape
6554639939Apparatus for cancelling periodic carrier phase jitters

1986

6564633485Adaptive noise suppression for digital modems
6574633484Receiver unit in radio communication system
6584631738Gain tracker for digital modem
6594631488QAM demodulator with distortion compensation
6604621366Modem equalizer training using previously stored parameters
6614608703Synchronization detection system for data transmission
6624606048Radio communication system
6634604583Frequency offset correcting circuit
6644601044Carrier-phase adjustment using absolute phase detector
6654592071Recovery of carrier and clock frequencies in a phase or amplitude state modulation and coherent demodulation digital transmission system
6664587498Circuit for recovering the carrier of an amplitude-and-phase-modulated input signal
6674583239Digital demodulator arrangement for quadrature signals
6684583236Modified absolute phase detector
6694581748QAM with DC bias in one channel
6704577334Digital data receiver including timing adjustment circuit
6714575682Circuit for establishing accurate sample timing
6724574246Demodulator with AGC circuit for multi-level quadrature amplitude-modulated carrier wave
6734574244QAM Demodulator automatic quadrature loop using n-m LSB's
6744573153Data transmitting-receiving system for suppressing data error
6754571550QAM Demodulator carrier recovery loop using n-m LSB's

1985

6764555790Digital modem having a monitor for signal-to-noise ratio
6774553102Multilevel amplitude modulation demodulator with DC drift compensation
6784546323Quadrature amplitude demodulator comprising a combination of a full-wave rectifying circuit and binary detectors
6794546322Adaptable demodulator for arbitrary amplitude and phase keyed modulation signals
6804544894DC Voltage control circuits
6814542514Method of measuring quality of a signal received by a receiver of a two-dimensional linear modulation data communication system
6824534026Normalized error compensator for modems using radial amplitude modulation for multiplexing
6834532640Phase tracking loop for digital modem
6844530104Circuit for reducing errors in a data receiver
6854521878Data transmitting-receiving system
6864520492Method for determining the optimum sampling times for a QPSK or QAM received signal
6874507648Decoding technique for multidimensional codes
6884503545System for evaluating transmission line impairments
6894493082Soft decision convolutional code transmission systems

1984

6904466109Carrier recovery arrangement for sixteen-state amplitude and phase modulation and receiving system for digital data, comprising such an arrangement
6914462108Modem signal acquisition technique
6924455663Full duplex modems and synchronizing methods and apparatus therefor
6934435773Receiver for effecting synchronous demodulation
6944433310Modulator-demodulator for four level double amplitude modulation on quadrature carriers

1983

6954381546System for the quantitative measurement of impairments in the communication channel of a quadrature amplitude modulation data communication system

1982

6964355402Data modem false equilibrium circuit
6974355397Full duplex communication system for voice grade channels
6984334312Phase synchronizing circuit for use in multi-level, multi-phase, superposition-modulated signal transmission system
6994327440Signal detector for use in digital communication
7004320526Adaptive phase-jitter tracker

1981

7014308505Frequency detector device and method
7024302757Bore telemetry channel of increased capacity
7034285062Digital multi-level multi-phase modulation communication system
7044283682Erasure zone decision feedback phase lock loop for carrier recovery in data modems
7054255713Carrier regeneration circuit for polyphase modulation system
7064247944V.29 Constellation detection method and apparatus

1980

7074227152Method and device for training an adaptive equalizer by means of an unknown data signal in a quadrature amplitude modulation transmission system
7084217467Amplitude and periodic phase modulation transmission system
7094206320High speed modem suitable for operating with a switched network

1979

7104166923Amplitude- and periodic phase-modulation transmission system
7114159527Wave generator
7124134075Amplitude-and-phase demodulator comprising a quantization circuit

1978

7134114710Carrier regeneration circuit
7144099130Phase synchronizing circuit
7154095187Demodulation system for a multi-level multi-phase superposition-modulated carrier wave
7164085449Digital modem
7174084137Multidimensional code communication systems
7184076956Decision network for receiver of PSK digital signals

1977

7194057762Device for phase synchronizing a reproduced reference carrier signal with windows specified for preselected ones of amplitude and phase modulated signal points
7204055727Partial response, quadrature amplitude modulation system
7214054838QAM phase jitter and frequency offset correction system
7224039961Demodulator for combined digital amplitude and phase keyed modulation signals
7234034305Demodulator for signals hybrid modulated by more and less significant digit signals in succession in each clock interval
7244027250Apparatus and method for reducing effects of amplitude and phase jitter
7254024342System for detecting digital data transmitted by modulating a carrier
7264004226QAM receiver having automatic adaptive equalizer

1976

7273983485Multi-phase and multi-amplitude level modulator and modulation and demodulation methods
7283978407Fast start-up adaptive equalizer communication system using two data transmission rates
7293971996Phase tracking network
7303970946Demodulator for amplitude-and-phase modulated signals having control means for reducing phase and amplitude errors
7313952187Circuit for transforming rectangular coordinates to polar coordinates
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017