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2017

19608695Communication system
29605934Relaying of missile body roll angle
39602326Apparatus and method for transmitting signal, apparatus and method for receiving signal
49602245Transmitting apparatus and interleaving method thereof
59596120Signal transmission apparatus, distortion compensation apparatus, and signal transmission method
69596118FBMC receiver using a method for synchronization in a frequency domain
79596112Method for communication via three orthogonal waveforms
89595924Calibration for power amplifier predistortion
99595920Hardware-efficient compensator for outphasing power amplifiers
109590836System and method for digital sideband mitigation: advanced modulation in a narrow bandwidth RF channel
119590800Multilevel modulation optical transceiver and multilevel modulation optical transmission and reception method
129585115RF carrier synchronization and phase alignment methods and systems
139584349Transmission circuit
149584169High frequency transmitter
159584154System and method for digital signaling
169577865Carrier recovery aided by pilot symbols carrying information
179577864Method and apparatus for use with received electromagnetic signal at a frequency not known exactly in advance
189577786Pilot symbol generation for highly-spectrally-efficient communications
199577698Semiconductor device including spiral shape inductor and horseshoe shape inductor
209577581Signal amplifier with active power management
219571326Method and apparatus for high-speed data transfer employing self-synchronizing quadrature amplitude modulation
229571325Transmission circuit, transmission method, and transmission system
239571137Single tone RF signal generator
249571131Signal generating method and signal generating device
259569648Apparatus and methods for wireless communication using load modulation
269568521Distortion estimation apparatus and method
279564992Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals
289564976Blind equalization of dual subcarrier OFDM signals
299564974Optical transmission device
309564928Transmitter and method for generating additional parity thereof
319559879PA cell, PA module, wireless communication unit, RF transmitter architecture and method therefor
329553754Post distortion in satellite communications
339553621Apparatus and methods for signal generation, reception, and self-calibration
349553618Signal cancellation method and device for wireless communication system
359548881Method and apparatus for transmitting and receiving data in broadcasting system
369548880Transmitter and its control method
379548771Method and apparatus for eliminating interference among transmission channels of transmitter
389544032System and method for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) offset quadrature amplitude modulation (OQAM)
399544008Integrated circuit
409544007Wireless transmission system, wireless communication device, and wireless communication method
419538547User equipment initiated discontinuous operation in a wireless communications network
429537513Rate adaptive turbo forward error correction
439537509Transmitting apparatus and interleaving method thereof

2016

449531576Method and apparatus for transmitting modulation symbol using 256QAM in a wireless access system
459531575Systems and methods for providing and/or using an OFDN-OQAM structure
469531478Digital optical modulator for programmable n-quadrature amplitude modulation generation
479531409Switched capacitor transmitter circuits and methods
489525581Wireless communication device and malfunction determining method
499525572Signal correction method and receiving machine
509521027Method for generating symbols for the automatic gain control of a signal to be transmitted
519521026Tomlinson-harashima precoding with non-overlapping dynamic modulation coding subsets
529521024Device of crest factor reduction
539520906Switched capacitor transmitter circuits and methods
549520834Quadrature mixer arrangement
559515737Method and device for data compression, transmission, and decompression
569509546Semi-polar modulator
579509489Correction of quadrature modulation errors
589504084Method to support an asymmetric time-division duplex (TDD) configuration in a heterogeneous network (HetNet)
599503305Method for low complexity decision metric compression of higher-order square-QAM constellation
609503303Symbol mapping for binary coding
619503294Amplitude and phase shift keying modulation for saturated amplifier systems
629503153Spread spectrum GMSK signals
639497713Accurate uplink power control for CoMP and C-RAN
649497061Undersampled receiver characterization
659491029Devices and methods for reducing signal distortion in I/Q modulation transceivers
669491028Phase synchronization of modulation or demodulation for QAM-based multiband TSV-link
679491027Miniature mobile marker system and method
689491026Transmission method
699490881Envelope tracking system for MIMO
709485126Signal combining system for constant envelope transmission of information
719485030Optical signal modulation
729484975Modular microwave backhaul outdoor unit
739484957Transmitter apparatus and signal processing method thereof
749479381Method for transmitting at least one multi-carrier signal consisting of OFDM-OQAM symbols
759479368Method and apparatus for adjusting pre-distortion coefficient
769479287Information transmission method and device
779479208System for the correction of the phase error of two in-phase and quadrature signals, corresponding device and method
789473340Orthogonal frequency division multiplexing polar transmitter
799473338Receiver, transmitter, feedback device, transceiver and signal processing method
809473244Flexible 400G and 1 Tb/s transmission over transoceanic distance
819473096Method and apparatus for adaptive transmit power control
829467954Power adjustment method and apparatus based on low delay power detection before DPD
839467394Time and frequency diversity modulation system and method
849467251Method and system for forward error correction decoding with parity check for use in low complexity highly-spectrally efficient communications
859467229Multilevel intensity modulation and demodulation system and method
869467212System and method for multiple-input multiple-output communication
879467164Apparatus and method for supporting polar code designs
889462582Enhanced PDCCH overlapping with the PDCCH region
899461865Apparatus and method for demodulating hybrid modulation symbol in wireless communication system using hybrid modulation scheme
909461864Apparatus and method for adaptively selecting channel code based on non-gaussianity of channel in wireless communication system
919461775Method, apparatus and system for transmitting information bits
929461771Method and apparatus for transmitting and receiving downlink control information
939461675System and method for enhanced transmitter efficiency
949450686Testing an upstream path of a cable network
959450629Systems and methods for controlling local oscillator feed-through
969450593Dither-less error feedback fractional-n frequency synthesizer systems and methods
979450553Apparatus and a method for amplifying a transmit signal
989444672Data modulation
999444514OTFS methods of data channel characterization and uses thereof
1009444500Modulation circuit of digital transmitter, digital transmitter, and signal modulation method
1019438460Partial discrete fourier transform-spread in an orthogonal frequency division multiplexing system
1029432946Transmission apparatus and transmission method
1039432236System for generating a calibration signal, related transceiver and method
1049432173Method and transceiver for cancelling multi-carrier transmission interference
1059426016Self track scheme for multi frequency band serializer de-serializer I/O circuits
1069426015Apparatus and method for symbol mapping in wireless communication system using multi tone frequency quadrature amplitude modulation
1079425874Signal generating method and signal generating apparatus
1089419837Distributed antenna system
1099419772Method and apparatus for transmitting and receiving MCS index for 256QAM in wireless access system
1109413583Calibrating RF path delay and IQ phase imbalance for polar transmit system
1119413582Method and apparatus for transmitting and receiving
1129413417Apparatus for improving receiver sensitivity in a communication system
1139413294Apparatus and method for correcting IQ imbalance
1149407306Quadrature amplitude modulation for time-reversal systems
1159407203Combined amplitude-time and phase modulation
1169401833Method and apparatus for transmitting/receiving signal in wireless communication system
1179401778Transmission device and distortion compensation method
1189398604System and method for managing multiradio communications in a single device
1199397781Method and apparatus for improving performance of transmit controlled adaptive modulation in xDSL and G.fast systems
1209397711Pre-distortion in a wireless transmitter
1219385907Dual re-configurable logic devices for MIMO-OFDM communication systems
1229385764Digital pre-distortion for high bandwidth signals
1239379930Transmitter devices of I/Q mismatch calibration, and methods thereof
1249379929Phase imbalance calibration
1259379745Multi-band wide band power amplifier digital predistortion system
1269379742RF transmitter, integrated circuit device, wireless communication unit and method therefor
1279374262Techniques for linearizing phase separately from amplitude in a communications system
1289374261Signal modulator and signal modulating method
1299374260Method and apparatus for directly detected optical transmission systems based on carrierless amplitude-phase modulation
1309374256Transmitter and method for reducing peak-to-average power ratio
1319374196System and method for digital memorized predistortion for wireless communication
1329374044Architecture of nonlinear RF filter-based transmitter
1339369318Scalable serial/de-serial I/O for chip-to-chip connection based on multi-frequency QAM scheme
1349363130Dynamic digital predistortion for a microwave radio system
1359363112Systems and methods for equalization in radio frequency signal paths
1369363068Vector processor having instruction set with sliding window non-linear convolutional function
1379363053Integrated circuit
1389363040Apparatus for transmitting and receiving a signal and method for transmitting and receiving a signal
1399362869Signal predistortion for non-linear amplifier
1409356732Quadrature error detection and correction
1419350578Sigma-delta modulation apparatus and sigma-delta modulation power amplifier
1429350487System and method quadrature error detection and correction
1439349029Transmission apparatus for a wireless device
1449344315Transmitting system and receiving system, and transmitting method and receiving method
1459344302Loopback technique for IQ imbalance estimation for calibration in OFDM systems
1469344041Polar amplification transmitter distortion reduction
1479344038Tri-phase digital polar modulator
1489338044Method and apparatus to track gain variation in orthogonal frequency division multiplexing (OFDM) systems
1499338039Efficient signal classification in digital pre-distortion systems
1509331886Magnetic field data modem
1519331885Modulation with fundamental group
1529331884Method and apparatus for encoding and decoding for frequency and quadrature-amplitude modulation in wireless communication system
1539331875System and method for communication using orbital angular momentum with multiple layer overlay modulation
1549331635Quadrature modulator
1559325557Radio communication apparatus and pulse signal transmission method in radio communication apparatus
1569319261Transmission apparatus
1579319091Semiconductor device including first inductor of a spiral shape and a second inductor having an opening which is opposite the first inductor
1589313747Structured codebook for uniform circular array (UCA)
1599313078Pulse cancellation crest factor reduction with a low sampling rate
1609313077Method and frequency agile pre-distorted transmitter using programmable digital up and down conversion
1619313076Antenna modulation method applicable to wireless transmitter and transmitter using the same
1629313055Transmitter linearization
1639306791Method for designing an amplitude and phase shift keying constellation
1649306778Enabling modulation mode selection
1659306731Signal processing apparatus
1669300514OFDM generation apparatus in a multi-carrier data transmission system
1679300513Signal transmission device adjusting electrical characteristic value corresponding to logic level and signal transmitting method thereof
1689300444Wideband quadrature error correction
1699294382Communication device and method for enhancing energy efficiency
1709294329Emphasized signal point arrangement operation for compensating DC imbalance
1719294328In-phase and quadrature radio frequency digital-to-analog converter
1729288099Predistortion circuit and method for predistorting a signal
1739288091Modulation method and apparatus with consideration of adaptive hybrid automatic repeat request in wireless communication system
1749287833Capture buffer of digital predistortion systems
1759281972Multi-band radio-frequency digital predistortion
1769276800Single frequency synthesizer based FDD transceiver
1779276799Wireless transmission apparatus and distortion compensation method
1789276798Non-recursive digital calibration for joint-elimination of transmitter and receiver I/Q imbalances with minimized add-on hardware
1799276687Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals
1809270416Multi-mode transmitter for highly-spectrally-efficient communications
1819264279Transmitter, receiver, and method for receiving and transmitting a radio frequency signal
1829264179Decision feedback equalizer for highly spectrally efficient communications
1839264144Transmission and reception of quad-subcarrier orthogonal frequency division multiplexed signals
1849264078Transmitter with quantization noise compensation
1859258159Transmitter and zero bits padding method thereof
1869258081High dynamic range AMAM predistortion
1879252986System and method for communication using orbital angular momentum with multiple layer overlay modulation
1889252822Adaptive non-linear model for highly-spectrally-efficient communications
1899246731Method and system for baseband predistortion linearization in multi-channel wideband communication systems
1909246525Device and method for predistortion
1919246510Apparatus and method for multilevel coding in communication systems
1929240919Polar modulator
1939240918Method, devices and computer program product for modulation and demodulation delivering OFDM/OQAM symbols
1949237054Distortion compensation device and distortion compensation device method
1959237053Discrete multi-tone systems for half-duplex IP links
1969236982PDSCH resource element mapping for three-cell joint transmission
1979236898Multi-band observation receiver
1989231805Device for carrier phase recovery
1999231804Digital broadcast transmitting device and exciter
2009231715I/Q mismatch compensation method and apparatus
2019231628Low-complexity, highly-spectrally-efficient communications
2029231624Time alignment for an amplification stage
2039231606Dither-less error feedback fractional-N frequency synthesizer systems and methods

2015

2049225578High order modulation method, demapping method, and corresponding device
2059225577Exciter and quadrature error correction method
2069225576Resilient channel and broadcast modulation
2079225501Non-linear modeling of a physical system using look-up table with polynomial interpolation
2089225500Microwave backhaul system having a dual channel over a single interconnect
2099225349Dither-less multi-stage noise shaping fractional-N frequency synthesizer systems and methods
2109210025Method and apparatus for correcting in-phase signal and quadrature-phase signal
2119210009Digital pre-distortion filter system and method
2129209852Modular microwave backhaul outdoor unit
2139209843Fine phase estimation for highly spectrally efficient communications
2149209834Symbol mapping for binary coding
2159209826Radio frequency circuit
2169203555Optimum signal constellation design and mapping for few-mode fiber based LDPC-coded CO-OFDM
2179198144Power supply adjustment and polar modulation in a MIMO system
2189197309Systems and methods for providing signals of multiple active wireless transmitters
2199197300Wireless precoding methods
2209197259System and method for increasing bandwidth for digital predistortion in multi-channel wideband communication systems
2219197164RF power transmission, modulation, and amplification, including direct cartesian 2-branch embodiments
2229197163Systems, and methods of RF power transmission, modulation, and amplification, including embodiments for output stage protection
2239191261System and method for transmitting a quadrature amplitude modulation (QAM) waveform to a receiver
2249191250Extended bandwidth adaptive digital pre-distortion with reconfigurable analog front-ends
2259184976Method and system for I/Q mismatch calibration and compensation for wideband communication receivers
2269184974In-phase and quadrature radio frequency digital-to-analog converter
2279184945Method for compensating the frequency dependent phase imbalance
2289184834Method and apparatus for detection and correction of time skew in an optical transmitter
2299184773Apparatus and methods for signal generation, reception, and self-calibration
2309184710Digital predistortion of a power amplifier for signals comprising widely spaced carriers
2319179405Transmission device, transmission method, receiving device and receiving method
2329178740Peak-to-average power ratio reduction for QAM modulation with HD radio signals
2339178739Method of wireless communication with a multi-antenna receiver
2349178734Communications transmitter having high-efficiency combination modulator
2359178731Transmission apparatus for a wireless device using delta-sigma modulation
2369178541Cartesian digital power amplifier using coordinate rotation
2379172574Dynamic-range reduction of complex-valued baseband signals
2389172409Multi-path digital pre-distortion
2399167185Transmission and reception apparatus and transmission and reception system
2409166859Wireless communication apparatus and transmission power control method
2419166858Method for modulating an OQAM type multi-carrier signal, and corresponding computer program and modulator
2429166840Method of transmitting data samples with reduced bandwidth
2439166833Feed forward equalization for highly-spectrally-efficient communications
2449166707Transmitter, signal generation device, calibration method, and signal generation method
2459166680Apparatus and method for measuring IQ imbalance for optical receiver
2469160583Method and equipment for controlling radio-frequency signal
2479148324Daisy-chained ring of remote units for a distributed antenna system
2489148267Radio communication apparatus and radio communication method
2499148096Device and method for controlling an input signal of a power amplifier
2509143213Method and apparatus for multi-antenna transmission in uplink
2519143091Distortion compensating apparatus, transmitter, distortion compensating method, and transfer function calculating method
2529143088Control modules
2539137084Digitally controlled edge interpolator (DCEI) for digital to time converters (DTC)
2549137081Satellite navigational signal generating method generating device receiving method and receiving device
2559137078Daisy-chained ring of remote units for a distributed antenna system
2569137069Systems and methods to frequency shift unwanted signal components
2579135108Data processing device and data processing method
2589130815Method, receiver, transmitter and communication system for phase error compensation
2599130814Interleaving method and deinterleaving method
2609130808Apparatus and method for communication using near Golay sequence
2619130628Digital pre-distorter
2629130627Multi-mode receiver for highly-spectrally-efficient communications
2639130626Frequency dependent I/Q impairment compensation
2649130623User equipment and method for radio communication system
2659118285Compensation of a transmitter distortion
2669116368Optical modulation device and bias voltage control method
2679112761System and method for routing and up-converting narrowband channels
2689112649Method and apparatus for predicting signal characteristics for a nonlinear power amplifier
2699112515Geographic locating remote endpoint monitor device, system, and methodology thereof
2709106502Apparatus, system and method of in-phase/quadrature (I/Q) imbalance compensation
2719106501Quadrature power amplifier having increased efficiency
2729106500Systems and methods of RF power transmission, modulation, and amplification, including embodiments for error correction
2739106415Microwave backhaul system having a double capacity link
2749106304Correction of quadrature errors
2759106292Coarse phase estimation for highly-spectrally-efficient communications
2769106256Data processing device and data processing method for encoding/decoding information bits
2779100263Distortion compensation apparatus and distortion compensation method
2789100080Digital radios
2799100071Timing pilot generation for highly-spectrally-efficient communications
2809094278Apparatus, method, and system for transmitting and receiving high-speed data in point-to-point fixed wireless communication
2819094277Digital compensation technique using area efficient tri-state architecture
2829094022Geographic locating remote endpoint monitor device, system, and methodology thereof
2839088472System for compensating for I/Q impairments in wireless communication system
2849088471Quadrature combining and adjusting
2859088319RF transmitter architecture, integrated circuit device, wireless communication unit and method therefor
2869083402High frequency circuit and high frequency module including the same
2879077577System and method for communication using orbital angular momentum with multiple layer overlay modulation
2889077409Signal processing system and signal processing method
2899077391Transmitter front-end device for generating output signals on basis of polyphase modulation
2909077298Sampling circuit, communication device, distortion correction circuit, signal sampling method, and program
2919077293Envelope tracking system for MIMO
2929071496All-digital multi-standard transmitter architecture using delta-sigma modulators
2939071305Timing synchronization for reception of highly-spectrally-efficient communications
2949070062Streamlined apparatus and methods for RFID communication
2959065538Transmission-reception device
2969065491Adjusting phase imbalance between in-phase (I) and quadrature-phase (Q) signals
2979054936Semiconductor device having horseshoe and spiral shape inductors
2989054642Systems and methods to provide compensated feedback phase information
2999036737Polar modulation
3009026391Distortion estimation apparatus and method
3019025700Digital polar modulator for a switch mode RF power amplifier
3029025430System and method of modulation and coding scheme adjustment for a LTE shared data channel
3039020069Active general purpose hybrid
3049014300Switched-mode high-linearity transmitter using pulse width modulation
3059008221Spurious frequency attenuation servo
3068995573Octagonal quadrature amplitude modulation
3078995571Baseband digital pre-distortion architecture
3088976692D.C. offset estimation
3098964895WLAN transmitter having high data throughput
3108953712Method for data modulation and transmitter using the same
3118948304Apparatus and method for transmitting and receiving data in a communication or broadcasting system using linear block code
3128938024Preamble generating device, preamble generating method, and non-transitory computer-readable recording medium storing a program
3138929484Communications transmitter having high-efficiency combination modulator

2014

3148924823System and method for cycle slip correction
3158908799Systems and methods for communicating using ASK or QAM with uneven symbol constellation
3168890634Multiplexed configurable sigma delta modulators for noise shaping in a 25-percent duty cycle digital transmitter
3178885766Optical communication interface utilizing N-dimensional double square quadrature amplitude modulation
3188879667Layer shifting in open loop multiple-input, multiple-output communications
3198867662Multidimensional constellations for coded transmission
3208867658Multicarrier-signal receiving apparatus and multicarrier-signal transmitting apparatus
3218861642Method and apparatus for mapping quadrature amplitude modulation symbol
3228855235Circuit transmission apparatus and transmission method
3238848831Direct digital synthesis of quadrature modulated signals
3248848830Method for providing a modulation scheme
3258842761Methodology and method and apparatus for signaling with capacity optimized constellations
3268837618Transmission processing method, transmitter, reception processing method, and receiver
3278817911Integrated circuit for controlling a process
3288817910Systems and methods for communicating using ASK or QAM with uneven symbol constellation
3298811533Communications transmitter having high-efficiency combination modulator
3308798200Constellation mapping method
3318792546Transmission circuit
3328787477Methods for assigning codewoods to points in hexagonal constellations in digital communication systems
3338781026Digital quadrature transmitter using generalized coordinates
3348755774Broadcast transmitting apparatus and method for processing broadcast signals
3358755462Frequency offset estimator for upstream cable signals
3368750420Method and apparatus for generating modulated radio waves
3378750410Multi-band power amplifier digital predistortion system and method
3388744084Methods, systems, and computer readable media for scrambled communication of data to, from, or over a medium
3398731103Multicarrier-signal receiving apparatus and multicarrier-signal transmitting apparatus
3408724738Multidimensional constellations for coded transmission
3418724735Quadrature modulator, signal generating device, and quadrature modulation method
3428718189Digital broadcasting systems using parallel concatenated coding of bit-complementary bitstreams
3438711955Spreading technique applied to broadband mobile communications by satelite relying on DVB-RCS
3448693576Method of transmitting symbols
3458693575Wireless precoding methods
3468675774Constellation rearrangement for transmit diversity schemes
3478675771Log likelihood ratio arithmetic circuit, transmission apparatus, log likelihood ratio arithmetic method, and program
3488674758Method and apparatus for improved high order modulation
3498665992Pilot symbol generation for highly-spectrally-efficient communications
3508660208Apparatus and methods for QAM modulation using dual polar modulation
3518625716Method and apparatus for performing HARQ in wireless communication system
3528625702Transmitting apparatus, transmission method, receiving apparatus, and receiving method

2013

3538611461Method and device for modulating the information of TFCI
3548605821Apparatus and method for scrambling in a wireless communication system
3558605820Method of transmitting data in wireless communication system
3568594233Quadrature communications device with power combiner and related methods
3578588335Radio communication device, radio communication method, and communication system using PADM transmission diversity
3588571123Apparatus and method for mapping symbol
3598565344Transmission circuit and communication device
3608548094Transmission device and modulation method
3618548079Transmitter, transmission method, receiver, and reception method
3628537909Method for transmitting signals using HARQ scheme to guarantee constellation rearrangement gain
3638520774Generation of radio frequency outputs
3648509136Network coding method and network coding apparatus
3658494087Method and system to reduce PAPR in single carrier and SCBT communications systems
3668488692Radio transmission device and radio transmission method
3678422579Quadrature amplitude modulation via modified-square signal point constellation
3688416884Digital RF transmitter optimized for linear quantized IQ up conversion
3698406283Modulation apparatus, test apparatus and correction method
3708400228Redundancy system for a telecommunication system and related methods
3718391407Data transmission device and method thereof, and data reception device and method thereof
3728369449Method and system of diversity transmission of data employing M-point QAM modulation
3738369448Bit mapping scheme for an LDPC coded 32APSK system
3748363752Methods and apparatus for reducing the average-to-minimum magnitude ratio of communications signals in communications transmitters
3758358719Method and device for the compensation of signal errors in IQ-modulators
3768355463Radio transmission device and modulation method
3778355427System and method for descrambling the phase of carriers in a multicarrier communications system
3788351870Systems and methods of RF power transmission, modulation, and amplification, including cartesian 4-branch embodiments

2012

3798319569Quadrature amplitude modulator and quadrature amplitude modulation method
3808295399Transmission apparatus, reception apparatus and digital radio communication method
3818295398Data re-transferring method based on bit transformation
3828290087Sample rate conversion in delta-sigma modulators
3838284865Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
3848284862Method for encoding data symbols with implicitly embedded pilot symbols in resource blocks for wireless networks
3858275069Transmitting apparatus, transmission method and signal generating apparatus
3868275067Adaptive turbo peak mitigation for peak-to-average ratio (PAR) reduction using reserved tones
3878270531Data transmissions in a mobile communication system employing diversity and constellation rearrangement of a 16 QAM scheme
3888270511Methodology and method and appartus for signaling with capacity optimized constellations
3898259848Hierarchical modulation for communication channels in single-carrier frequency division multiple access
3908249190Dual carrier modulation
3918238474Trellis modulation protocols for a VDSL system
3928218680Radio communication apparatus capable of switching modulation schemes
3938218679Method and system for creating quadrature modulation signal constellations with arbitrary spectral efficiency
3948218674OFDM transmitter with adaptive bit interleaver for adaptive bit loading and method for OFDM communications
3958218610System and method for descrambling the phase of carriers in a multicarrier communications system
3968208572Method for transmitting and receiving quadrature amplitude modulation signals, a system for carrying out said method, a machine-readable carrier and the use of a method for synchronously receiving quadrature amplitude modulation signals
3978204140Subscriber unit and method for variable forward error correction (FEC) decoding
3988203394RF vector modulator for beamforming
3998183951Modulator
4008179783System and method of modulation and coding scheme adjustment for a LTE shared data channel
4018149902Methods to relax the second order intercept point of transceivers
4028139676Wireless communication unit, linearised transmitter circuit and method of linearising therein
4038111765Communication apparatus, communication method, and integrated circuit
4048102942VSB modulation apparatus and method for generating a VSB-modulated wave
4058090008System and method for scrambling the phase of the carriers in a multicarrier communications system

2011

4068085108Digital polar radio frequency transmitting device with a radiofrequency reference oscillator and an integrated circuit comprising such device
4078081695Channel estimation using frequency smoothing
4088077800Transmitting apparatus with bit arrangement method
4098073041System and method for descrambling the phase of the carriers in a multicarrier communications system
4108059751Frequency dependent phase rotation prior to mapping in an OFDM transmitter
4118059750Method and apparatus for generating training sequence code in a communication system
4128050355Transmitter and receiver using pseudo-orthogonal code
4138040974Shift space-time coding for digital video broadcasting systems
4148036301Radio transmitter with reduced power consumption
4158005163Constellation rearrangement for transmit diversity schemes
4168000410Bit reliability equalization by modulation switching for HARQ
4177983630Digital IF wireless transmitter, RF modulator, and RF modulating method
4187983359Synchronization techniques for polar transmitters
4197965791Transmitting apparatus with bit arrangement method
4207965761Multicarrier sub-layer for direct sequence channel and multiple-access coding
4217961814Method for using a symbol mapper using a symbol mapping scheme to generate modulation symbols according to a different symbol mapping scheme and a method for generating a symbol mapping scheme
4227961813Multi-value modulation/demodulation method and multi-value modulation/demodulation device
4237961805Method for the coding of an OFDM/OQAM signal using symbols with complex values, and corresponding signal, devices and computer programs
4247953379Method and system for calibrating quadrature modulators
4257953177Radio communication apparatus capable of switching modulation schemes
4267933352Cross QAM modulation-based symbol mapping method and apparatus in a mobile communication system
4277925228Method and system for calibrating quadrature modulators
4287920647Receiving apparatus and transmitting apparatus
4297920645Data transmissions in a mobile communication system employing diversity and constellation rearrangement of a 16 QAM scheme
4307907641Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme
4317903759Method for transmitting and receiving quadrature-amplitude modulation signals, system for implementing thereof, machine-readable medium, and application of the method for synchronizing reception of amplitude modulation signals
4327873120Forward error correction coding for AM 9kHz and 10kHz in-band on-channel digital audio broadcasting systems
4337872545Jumpless phase modulation in a polar modulation environment
4347872544Modulation/demodulation apparatus and modulation/demodulation method
4357864883Method and apparatus for modulating digital signal using equilateral triangular constellation
4367864882Method and apparatus for generating constant envelope modulation using a quadrature transmitter

2010

4377860186Transmitting apparatus with bit arrangement method
4387852969System and method for dynamic calibration of a quadrature encoder
4397848453Independent LO IQ tuning for improved image rejection
4407848452Distortion compensating apparatus
4417844015Method for calibrating a quadrature modulator and a modulation system
4427843802Method for uplink multiuser OFM with constrained inputs
4437817747Precise delay alignment between amplitude and phase/frequency modulation paths in a digital polar transmitter
4447809078OFDM modulator
4457801246Multi-mode communication device for generating constant envelope modulated signals using a quadrature modulator
4467778354Communicating apparatus, method of calculating set value of orthogonal error compensation and orthogonal error compensation program
4477773693Apparatus and method for direct quadrature power amplifier modulation
4487769104System and method for scrambling the phase of the carriers in a multicarrier communications system
4497756217Method and system for a robust initialization symbol for digital duplexing
4507742542Phase correlated quadrature amplitude modulation
4517738590Radio communication apparatus capable of switching modulation schemes
4527724840RF transmitter with predistortion and method therefor
4537724805Fast RMS measurement of input I/Q signals in a W-CDMA system
4547719376Avoidance of discontinuities when switching between modulation schemes
4557715809EDGE modulator
4567711064Method for digital wireless communications
4577697654Determining effective carrier-to-interference plus noise ratio in OFDMA systems
4587672398Method and system for adjusting the amplitude and phase characteristics of real and imaginary signal components of complex signals processed by an analog radio transmitter
4597653148System and method for delivery of video, content on demand and IP packets

2009

4607639756Apparatus and method for adjusting quadrature modulator, communication apparatus and program
4617630455Apparatus and method for digital wireless communication
4627630453Multi-level modulation method and system
4637623000Hybrid linear and polar modulation apparatus
4647616702Transmission circuit and communication apparatus comprising the same
4657599446Modulation and demodulation based on hierarchical modulation
4667570711Quadrature LINC transmission method and apparatus
4677548591Quadrature modulator and calibration method
4687545882Transmission apparatus, reception apparatus and digital radio communication method
4697539270Method and apparatus to interleave bits across symbols from different constellations
4707535975QAM mapping and bit labeling or bit-interleaved coded modulation
4717532679Hybrid polar/cartesian digital modulator
4727532673Transport of modulation symbols in a communications system
4737499696Method to optimize hierarchical modulation for a diversity system
4747499503Parallel concatenated code with soft-in soft-out interactive turbo decoder
4757492832Method and apparatus for digital vector QAM modulator

2008

4767471741Method, apparatus and system for high-speed transmission on fiber optic channel
4777471740ARQ retransmission with reordering scheme employing multiple redundancy versions and receiver/transmitter therefor
4787471640Scalable QAM system and method
4797460614Method and system for adjusting the amplitude and phase characteristics of real and imaginary signal components of complex signals processed by an analog radio transmitter
4807453957Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space
4817450660Apparatus and method for digital modulation
4827443924Residual carrier and side band processing system and method
4837412008Programmable phase mapping and phase rotation modulator and method
4847379509Digital intermediate frequency QAM modulator using parallel processing
4857359457Transmission apparatus, reception apparatus and digital radio communication method
4867356092Wireless communication system and communication semiconductor integrated circuit device
4877346123Quadrature modulator
4887340008Method and apparatus for rearranging codeword sequence in a communication system

2007

4897289573Modulator/transmitter apparatus and method
4907280606Apparatus and method for transmitting/receiving data in a CDMA mobile communication system
4917276985Transmission modulation apparatus, communication apparatus and mobile wireless apparatus
4927274753Method of implementing modulation and modulator
4937251293Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics
4947245667Method of transmitting data
4957236757High-speed multi-channel communications transceiver with inter-channel interference filter
4967206353Mobile communication apparatus including an antenna array and mobile communication method
4977203248Impairment sensitive selection of constellation points for communication across a channel
4987177371Methods and apparatus for transmitting and receiving data over a communications network in the presence of interference
4997173978Method and system for turbo encoding in ADSL
5007164328Direct digital amplitude modulator
5017161991Multi-dimensional fractional number of bits modulation scheme

2006

5027151805System for generating an analogue I/Q signal from two or more data streams
5037145964Maximizing data rate by adjusting codes and code rates in CDMA system
5047145963Method and apparatus for multiple phase splitting for dual band IQ subharmonic mixer drive chains
5057136425Combining frequency multiplication and modulation
5067133462Method and apparatus for determining modulation scheme for retransmission in a communication system
5077130358Method and apparatus for rearranging codeword sequence in a communication system
5087127006Method for transmitting frames comprising bursts modulated with different modulation schemes on radio communication channel
5097110470ARQ retransmission with reordering scheme employing multiple redundancy versions and receiver/transmitter therefor
5107103112Transmit frequency domain equalizer
5117092454Method and apparatus of compensating imbalance of a modulator
5127079585Gray encoding for hierarchical QAM transmission systems
513707898116 QAM modulator and method of 16 QAM modulation
5147072421IQ modulation systems and methods that use separate phase and amplitude signal paths and perform modulation within a phase locked loop
5157068730Wideband multi-channel quadrature amplitude modulation of cable television signals
5167065158Detection method for phase-modulated symbols with a correlator-bank
5177065145Digital carrierless amplitude and phase modulation (CAP) transmitter using vector arithmetic structure (VAS)
5187054658Pulse shaping according to modulation scheme
5197046739Pre-distortion of input signals to form constant envelope signal outputs
5207039126M-ary signal constellations suitable for non-linear amplification
5217012953Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space
5226996190Method of encoding a signal, transmitter and receiver
5236996189Symmetric spherical QAM constellation
5246993092Transmission apparatus, reception apparatus and digital radio communication method
5256990155Wireless quadrature modulator transmitter using E/O and O/E connectives
5266987814Distortion compensating device

2005

5276968016Device and method for I/Q modulation, frequency translation and upsampling
5286963622Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes
5296963621Method and apparatus for reducing distortion of digital data
5306957044Satellite communication apparatus
5316947713Amplitude- and frequency- or phase-modulated radio frequency signal generator and the transmitter incorporating same
5326947712Group delay precompensator for broadband radio frequency transmitter and method of operating the same
5336944250Variable rate modulator
5346940919Bandpass predistortion method and apparatus for radio transmission
5356937848Method and device for digital-to-RF conversion
5366937669Digital predistortion system for linearizing a power amplifier
5376937668Method of and apparatus for performing modulation
5386937617Apparatus and method for trellis encoding data for transmission in digital data transmission systems
5396928101FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
5406914943Signal modulation circuit and signal modulation method
5416904267Amplifying device
5426904099Digital modulation signal generator
5436894657Bi-directional vector modulator
5446885322Apparatus and method for transmitter phase shift compensation
5456885241Type-based baseband predistorter function estimation technique for non-linear circuits
5466879641Transmit pre-equalization in a modem environment
5476873860Base transceiver station with distortion compensation
5486870435Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture
5496870429Variable rate modulator
5506864745Distortion compensation device
5516853691Vector modulator using amplitude invariant phase shifter

2004

5526836646Circuit and method for compensating for non-linear distortion
5536836517Distortion compensating apparatus
5546831954Apparatus, and associated method, for compensating for distortion introduced upon a send signal by an amplifier
5556831526Phase and amplitude digital modulation circuit and method
5566809607Circuit and method for compensating for non-linear distortion
5576801582Apparatus and method for improving an output signal from a nonlinear device through dynamic signal pre-distortion based upon Lagrange interpolation
5586798844Correction of phase and amplitude imbalance of I/Q modulator
5596795693Method for controlling the transmitter part of a radio transceiver and a corresponding radio transceiver
5606771710Partial frequency offset digital upconversion
5616771709System and method for direct transmitter self-calibration
5626763227Systems and methods for modulator calibration
5636757261GSM transceiver with time division duplexed operations for receiving data, monitoring signal strength and transmitting data during a single time frame
5646754285Signal conditioning techniques in DMT-based transmissions
5656751269Bit-interleaved coded modulation for CATV upstream channels
5666751268Bandpass predistorting expansion method and apparatus for digital radio transmission
5676741662Transmitter linearization using fast predistortion
5686738431Method for neutralizing a transmitter tube
5696738415Bi-directional communication system
5706737918Distortion compensation apparatus
5716731694Isolator eliminator for a linear transmitter
5726731693System of and method for compensating a baseband signal to reduce third order modulation distortion
5736724831Pre-distortion apparatus and method thereof
5746724829Automatic power control in a data transmission system
5756714601Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
5766711218System and method for received signal decoding
5776711216Method and apparatus for an ultra-wideband radio utilizing MEMS filtering
5786707857Reference signal pre-distortion for transmitter with frequency synthesizer based phase encoding
5796700453Amplitude imbalance compensation of quadrature modulator
5806693970QAM modulator
5816693956Power amplifier having negative feedback circuit for transmitter
5826690743Compensation of delay in linearization loop of power amplifier
5836687311Direct QAM modulator with digital feedback control and complex pre-equalization for phase and amplitude distortion
5846683917Base band signal processing circuit capable of improving both noise characteristic and distortion characteristic
5856678334Methods of reducing the complexity of trellis-based scalar-vector quantizers
5866674823Variable rate modulator
5876674811Efficient pre-distorted 12/4 QAM modulator
5886674808Post-amplifier filter rejection equalization

2003

5896671337Carrier modulator for use in a transmitter or transceiver
5906671336Gain controller for circuit having in-phase and quadrature channels, and method
5916670900Quadrature mismatch compensation
5926665308Apparatus and method for equalization in distributed digital data transmission systems
5936657510Corrective phase quadrature modulator system and method
5946654426Correction of nonlinearity of I/Q modulator
5956653909Digital signals, radio transmitter circuits and method
5966650711Quadrature modulation with reduced phase-error distortion
5976647074Removal of clock related artifacts from an offset QAM generated VSB signal
5986647073Linearisation and modulation device
5996636555Amplitude limitation
6006633199Amplifier circuit, radio transmitter, method and use
6016631254Apparatus for producing a radio-frequency signal
6026621876System and method to reduce phase modulation bandwidth
6036614854System and method for adaptive predistortion
6046611568Variable rate modulator
6056611567Method and apparatus for pulse shaping
6066608532Circuit configuration for producing a quadrature-amplitude-modulated transmission signal
6076593827Modulating array transmitter autocalibration method and system
6086591090Predistortion control for power reduction
6096577898Bi-directional telemetry system and method for transmitting data at high transmission rate
6106574286Modulation system having on-line IQ calibration
6116570933Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
6126570914Amplitude calculation circuit
6136567478Radio apparatus having distortion compensating function
6146560293Apparatus and method for FM remodulation of envelope modulated data signals
6156559994Optical fiber transmitter for long distance subcarrier multiplexed lightwave systems
6166535562Method and apparatus for rotating the phase of a complex signal
6176535073Device and method for I/Q modulation, frequency translation and upsampling
6186519010Broadcast transmission system with sampling and correction arrangement for correcting distortion caused by amplifying and signal conditioning components
6196515712Signal distortion compensating apparatus and method in digital TV translator
6206512800Method and system for correcting phase and amplitude imbalances of a quadrature modulated RF signal
6216507625Digital modulator and digital demodulator
6226504879Digital modulation apparatus

2002

6236498823Variable rate modulator
6246480704Method and arrangement for forming a transmission signal
6256463093METHOD AND APPARATUS TO REDUCE SPURIOUS AND INTERMODULATION PRODUCTS IN WIRELESS BROADBAND MULTI-CARRIER DIGITAL TRANSCEIVER EQUIPMENT THROUGH STATIC NON-LINEARITY CORRECTION OF DIGITAL CONVERSION COMPONENTS
6266449465Method and apparatus for linear amplification of a radio frequency signal
6276449303System and method for peak power reduction in multiple carrier communications systems
6286449302System and method for peak power reduction in spread spectrum communications systems
6296445749FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA, and CSMA
6306445748Non linear amplitude precorrection for HDTV transmitter
6316442192CDMA type multiple transmission apparatus and CDMA type multiple transmission method
6326441694Method and apparatus for generating digitally modulated signals
63364341992N-QAM macrocell
6346433604Phase adjustment technique
6356430228Digital QAM modulator using post filtering carrier recombination
6366429798Combined transmit filter and D-to-A converter
6376421398Modulation system having on-line IQ calibration
6386421397Modulation system having on-line IQ calibration
6396421396Variable rate modulator
6406418173Transmission Apparatus
6416411655Systems and methods for converting a stream of complex numbers into an amplitude and phase-modulated radio power signal
6426400777Linear modulator
6436400774Nonlinearity-caused distortion compensating system
6446400415System and method for predistorting signals to be amplified
6456400233Method and apparatus for compensating for distortion in IQ modulators
6466396345Phase and amplitude detector and method of determining errors
6476393258PROCESS AND SYSTEM FOR ADJUSTING THE LEVEL OF THE SPURIOUS LINES OF THE OUTPUT FREQUENCY SPECTRUM OF A SINGLE-SIDEBAND FREQUENCY TRANSPOSITION DEVICE, IN PARTICULAR INCORPORATED INTO A MOBILE TELEPHONE
6486385439Linear RF power amplifier with optically activated switches
6496384677Power amplifier having negative feedback circuit for transmitter
6506373902Device and method for linearizing transmitter in digital communication system
6516373901Method and apparatus for conditioning modulated signals using window expansion
6526366619Constrained-envelope transmitter and method therefor
6536356555Apparatus and method for digital data transmission using orthogonal codes
6546351677Method and device in a telecommunication system
6556339621One bit digital quadrature vector modulator
6566335951Programmable waveform generator for a global positioning system
6576335767Broadcast transmission system with distributed correction
6586335766System and method for transmitting advanced television signals

2001

6596307868Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops
6606298096Method and apparatus for determination of predistortion parameters for a quadrature modulator
6616285412Adaptive pre-equalization apparatus for correcting linear distortion of a non-ideal data transmission system
6626282411Mobile communication terminal device
6636278743Non linear amplitude precorrection for HDTV transmitter
6646272326Distortion compensation address generator, distortion compensating circuit, and transmitter
6656269125System and method for trellis encoding a digital signal
6666266517Method and apparatus for correcting distortion in a transmitter
6676265949Phase compensation apparatus and method for a digital modulator
6686252912Adaptive predistortion system
6696243422Waveform shaping method and equipment
6706240142Quadrature modulator and demodulator
6716236837Polynomial Predistortion linearizing device, method, phone and base station
6726208698Quadrature modulator imbalance estimator and modulator stage using it
6736195396Encoding/decoding system using 16-QAM modulation encoded in multi-level blocks
6746194963Circuit and method for I/Q modulation with independent, high efficiency amplitude modulation
6756185259Transmitter/receiver for GMSK and offset-QAM
6766185255System and Method for exciting advanced television signals
6776181199Power IQ modulation systems and methods
6786175599Method and apparatus for transmitting and receiving digital data over a bandpass channel
6796169463Quadrature modulator with set-and-forget carrier leakage compensation

2000

6806166774Combining NTSC visual and aural signals with DTV signals
6816166598Power amplifying circuit with supply adjust to control adjacent and alternate channel power
6826157254Double side band pilot technique for a control system that reduces distortion produced by electrical circuits
6836154456Apparatus and method for digital data transmission using orthogonal codes
6846144712Variable rate modulator
6856141387Digital QAM modulator using post filtering carrier recombination
6866137841Signal power adjustment for QAM communication systems
6876125266Dual band architectures for mobile stations having transmitter linearization feedback
6886108385Method and apparatus for reducing intermodulation distortion in digital wideband transmission systems
6896104761Constrained-envelope digital-communications transmission system and method therefor
6906094458Arrangements and methods for generating a radio frequency signal
6916091941Radio apparatus
6926081698Radio apparatus and offset compensating method
6936081158Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system
6946078628Non-linear constant envelope modulator and transmit architecture
6956055021System and method for obtaining synchronization to a digital frame
6966046649Communication system employing paired power amplifiers and drift compensation feedback control loops
6976044117Peak clipping circuit provided in a quadrature modulator and a method of clipping peak levels of in-phase and quadrature signals
6986034999Burst signal transmitter capable of producing correct transmission output in initial burst signal

1999

6996002923Signal generation in a communications transmitter
7005991308Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant
7015987072Phase modulation scheme and apparatus
7025987071Digital modulator and digital demodulator
7035982818Method for implementing trellis codes for ISI channels
7045973559Transmitter for high frequency signals
7055966376Apparatus and method for digital data transmission using orthogonal cyclic codes
7065929703Method and device for modeling AM-AM and AM-PM characteristics of an amplifier, and corresponding predistortion method
7075926507Quotient coding modem
7085923651Increasing data throughput in a wireless telecommunications environment
7095920416Optical method of transmitting digital data
7105917858Digital transmission system with symbol encoding which maximizes the signal amplitude-to-noise ratio
7115917384Modulating array transmitter and method having improved on-off keying
7125914620Frequency doubling of a quadrature-amplitude modulated signal using a frequency multiplier
7135913154VSWR control technique for terminal products with linear modulation
7145909642Nonlinear distortion detecting circuit and nonlinear distortion compensating circuit for transmitter
7155907264Power recycling for modulating array transmitters
7165905760Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type
7175903823Radio apparatus with distortion compensating function
7185903611Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type
7195901346Method and apparatus utilizing a compensated multiple output signal source
7205901179Waveform shaping method and equipment
7215886584Method and apparatus for adjusting modulation accuracy of an orthogonal modulation
7225883551Quadrature modulator malfunction estimator and modulator stage using it
7235881107Transmission system for digital signals, and transmitter and receiver therefor
7245867071High power transmitter employing a high power QAM modulator
7255864492Randomized digital waveshape samples from a look up table
7265862181Transmitting receiving apparatus

1998

7275852389Direct QAM modulator
7285838733Method and apparatus for mitigating signal distortion in a communication system
7295838727Method and apparatus for transmitting and receiving digital data over a bandpass channel
7305825828Method and apparatus for multi-level quadrature amplitude modulation
7315825820Waveform shaping method and equipment
7325815531Transmitter for encoded data bits
7335815046Tunable digital modulator integrated circuit using multiplexed D/A converters
7345802451Non-linear compensation circuit for a power amplifier
7355802111Complex constellation point multiplier
7365796783Digital transmission system
7375793759Apparatus and method for digital data transmission over video cable using orthogonal cyclic codes
7385784402FMOD transceivers including continuous and burst operated TDMA, FDMA, spread spectrum CDMA, WCDMA and CSMA
7395781076Digital quadrature amplitude modulators
7405778029Signal conditioner with symbol addressed lookup table producing values which compensate linear and non-linear distortion using transversal filter
7415768317Equalization filter compensating for distortion in a surface acoustic wave device
7425768269Apparatus and method for establishing frame synchronization in distributed digital data communication systems
7435767750Modulator
7445748678Radio communications apparatus
7455745837Apparatus and method for digital data transmission over a CATV system using an ATM transport protocol and SCDMA
7465740520Channel correction transceiver
7475729575Transmitter and receiver system and method utilizing a pilot carrier notch data encoded signal
7485714916Modulator
7495706311Modulator circuit
7505705958Apparatus 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

7515703909Programmable voltage controlled attenuator
7525699383High-power linear amplification using periodically updated amplitude and phase correction values
7535696794Method and apparatus for conditioning digitally modulated signals using channel symbol adjustment
7545692013Shared resources modulator-demodulator circuits for use with quadrature amplitude modulated signals
7555638401Method and apparatus for generating plural quadrature modulated carriers
7565625647Transmitter having automatic level control function
7575623226Automatic calibration of carrier suppression and loop phase in a Cartesian amplifier
7585621762Radio with peak power and bandwidth efficient modulation
7595617063Matched filters for processing related signal components
7605613226Linear transmitter for use in combination with radio communication systems
7615612651Modulating array QAM transmitter
7625604771System and method for transmitting sound and computer data
7635598436Digital transmission system with predistortion

1996

7645586146Programmable voltage controlled attenuator
7655559807Power amplifier linearization in a TDMA mobile radio system
7665553318Transmitter having envelope feedback loop and automatic level control loop
7675548253Spectrally efficient quadrature amplitude modulator
7685535245Modulation/demodulation circuit for a digital signal recorder/reproducer
7695534828Digitized quadrature modulator
7705534827Modulator
7715533048Apparatus and method for compensating for limiter induced non-linear distortion in a wireless data communication system
7725509033Quadrature overlapping modulation system
7735507033Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
7745507014Radio transmitter circuit with time dependant inhibited transmissions
7755504465Microwave modulator having adjustable couplers
7765491457F-modulation amplification

1995

7775469127Amplification apparatus and method including modulator component
7785469105Transmitter and power amplifier therefor
7795459749Multi-level superposed amplitude-modulated baseband signal processor
7805450044Quadrature amplitude modulator including a digital amplitude modulator as a component thereof
7815448203Negative-feedback amplifier and feedback controlling method thereof
7825438301Modem having a phase corrector and a voltage controlled oscillator implemented using a multi-stage ring oscillator
7835434887Quadrature modulation circuit for use in a radio transmitter
7845420536Linearized power amplifier
7855404378Distortion compensating circuit
7865396196Quadrature modular with adaptive suppression of carrier leakage
7875387883Quadrature modulator having controlled phase shifter
7885386590Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
7895381108Automatic calibration of the quadrature balance within a cartesian amplifier

1994

7905371481Tuning techniques for I/Q channel signals in microwave digital transmission systems
7915369789Burst signal transmitter
7925343500Non-linear encoder and decoder for information transmission through non-linear channels
7935339054Modulated signal transmission system compensated for nonlinear and linear distortion
7945329259Efficient amplitude/phase modulation amplifier
7955321799Signalling transition control in a modulated-signal communications system
7965293406Quadrature amplitude modulator with distortion compensation

1993

7975265127Non-linear encoder and decoder for information transmission through non-linear channels
7985253271Method and apparatus for quadrature amplitude modulation of digital data using a finite state machine
7995237292Quadrature amplitude modulation system with compensation for transmission system characteristics
8005204881System for set-up of transmitters in high capacity digital radio links
8015200978Process for actuation of multi-level digital modulation by a digital signal processor
8025193224Adaptive phase control for a power amplifier predistorter
8035177455Digital phase and amplitude modulator

1992

8045172071Linearized output control of a nonlinear amplifier
8055153536Suppressed carrier modulator formed from two partial modulators each including a phase delay path
8065148448Adaptive predistortion circuit with memory
8075124861Digital signal magnetic recording and playback apparatus employing quadrature amplitude modulation
8085123031Control voltage generator in a transmitter arrangement for digitally modulated signals
8095119399Quadrature measurement and calibration of a vector modulator
8105113414Predistortion arrangement for a digital transmission system
8115107520Adaptive predistortion circuit for a digital transmission system
8125105446Digital method of correcting non-linearity in a transmission chain, and apparatus implementing the method
8135105445Predistortion arrangement for a digital transmission system
8145091919Transmitter arrangement for digitally modulated signals
8155081647Communication of a voice signal via continuous quadrature amplitude modulator

1991

8165066923Linear transmitter training method and apparatus
8175066922Stabilizing circuit for feedback RF amplifier
8185058135Modulating arrangement for phase and amplitude modulation of a wave
8195054037Method of servo-controlling the parameters of a modulator having 2.sup.n phase and amplitude states, and a circuit for implementing the method
8205040194Method and apparatus for providing for automatic gain control of incoming signals in a modem
8214999590Four state phase shift modulator, in particular for amplitude modulation of two carriers in quadrature with a large number of states
8224993047Volterra linearizer for digital transmission
8234985688Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto

1990

8244967164Adaptive predistortion circuit
8254965536Quadrature amplitude modulation system using digital filters
8264910474Method and apparatus for generating phase and amplitude modulated signals

1989

8274881049QAM modulator/demodulator
8284868864Autocorrelating 2400 bps handshake sequence detector
8294849703Method and apparatus for generating a data sampling clock locked to a baud clock contained in a data signal
8304843613Digitally implemented modulators
8314843351Vector modulation signal generator
8324816783Method and apparatus for quadrature modulation
8334808937Phase-locked loop for a modem
8344801899Quadrature amplitude modulation/demodulation device using multi-level digital signals

1988

8354777453Quadrature amplitude modulator using switched capacitor filter
8364759039Simplified recovery of data signals from quadrature-related carrier signals
8374751478Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component
8384737969Spectrally efficient digital modulation method and apparatus
8394736389Technique for synthesizing the modulation of a time varying waveform with a data signal
8404717894Calibration of vector modulators using a scalar detector

1987

8414700151Modulation system capable of improving a transmission system
8424672634Arrangement for generating an angle-modulated carrier signal of constant amplitude in response to data signals
8434665532Radio communication system
8444661948Digital quadrature amplitude modulator
8454646326QAM modulator circuit
8464644565Superposed quadrature modulated baseband signal processor

1986

8474626803Apparatus for providing a carrier signal with two digital data streams I-Q modulated thereon
8484617537Method for digital quadrature amplitude modulation
8494606048Radio communication system
8504581748QAM with DC bias in one channel
8514573153Data transmitting-receiving system for suppressing data error
852457154916-QAM Modulator with PLL amplification devices

1985

8534562425Differential encoder and decoder for transmitting binary data
8544529950Digital phase and amplitude modulator
8554525847QAM encoder
8564521878Data transmitting-receiving system

1984

8574485357Circuit for amplitude and phase modulation of carrier signal by two respective input signals
8584464767System for generation of multiple pointed QAM signal spaces by use of synchronous Qam transmitters
8594458216Switched-capacitor modulator for quadrature modulation
8604442530Digital transmitter with vector component addressing
8614433310Modulator-demodulator for four level double amplitude modulation on quadrature carriers

1983

8624404532Modulator having improved bandwidth and power requirements

1982

8634358853Digital modem transmitter
8644355397Full duplex communication system for voice grade channels
8654327439Method for generating modem transmission signals with quadrature amplitude modulation

1981

8664302757Bore telemetry channel of increased capacity
8674291277Adaptive predistortion technique for linearizing a power amplifier for digital data systems
8684285062Digital multi-level multi-phase modulation communication system

1980

8694217467Amplitude and periodic phase modulation transmission system

1979

8704166923Amplitude- and periodic phase-modulation transmission system

1978

8714123710Partial response QAM modem
8724085449Digital modem
8734084137Multidimensional code communication systems

1977

8744055727Partial response, quadrature amplitude modulation system

1976

8753983485Multi-phase and multi-amplitude level modulator and modulation and demodulation methods
8763980971Modulator for hybrid modulation by more and less significant digital signals in succession in each clock interval and counterpart demodulator
8773931860Low-profile platform scale
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017