СПИСОК патентов США - подгруппа МПК16 H04L27/233


Выделить слова в названиях патентов:


№ п/п Номер патента Название патента

2017

19602238Decoding method and apparatus
29564963Automatic power control system for a code division multiple access (CDMA) communications system
39553748Synchronous demodulator electronic circuit for phase modulation signals
49537533PLC FCH unitary circle differential symbol and preamble encoding determination
59537513Rate adaptive turbo forward error correction

2016

69529567Digital processor having instruction set with complex exponential non-linear function
79491018Carrier phase and amplitude estimation for phase shift keying using pilots and data
89479373Packet processor verification methods and systems
99470726Temperature compensated real-time clock
109450624Interference cancellation and improved signal-to-noise ratio circuits, systems, and methods
119438458Method and apparatus for converting analog radio frequency (RF) signals to the digital domain in a multiband and multicarrier wireless communication system
129425807Circuit for symbol timing synchronization
139372663Direct digital synthesis of signals using maximum likelihood bit-stream encoding
149363128Method and apparatus for phase-based multi-carrier modulation (MCM) packet detection
159325551Removal of irrelevance in phase-modulated digital carrier-signals
169312987Collision detection using a multiple symbol noncoherent soft output detector
179300508High data rate milllimeter wave radio on a chip
189294321Bit signal structure for differentially encoded broadcasts
199292255Multi-stage crest factor reduction (CFR) for multi-channel multi-standard radio
209280315Vector processor having instruction set with vector convolution function for fir filtering
219276800Single frequency synthesizer based FDD transceiver
229276792Phase-domain digitizer

2015

239201628Maximum likelihood bit-stream generation and detection using M-algorithm and infinite impulse response filtering
249184976Method and system for I/Q mismatch calibration and compensation for wideband communication receivers
259143316Non-disruptive eye scan for data recovery units based on oversampling
269137062Wireless communication apparatus and wireless communication method
279112763Device, system and method for bi-phase modulation decoding
289112515Geographic locating remote endpoint monitor device, system, and methodology thereof
299106346Method of decoding optical data signals
309094022Geographic locating remote endpoint monitor device, system, and methodology thereof
319083471Coherent and self-coherent signal processing techniques
329065709Digital radio data system receiver methods and apparatus

2011

337898322Demodulator for a low power radio receiver

2010

347817709Non-coherent phase differential and multiple orthogonal signal reception

2007

357245671Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers

2005

366959054Filter bank and receiver for processing continuous phase modulated signals
376940875Continuously adjusted-bandwidth discrete-time phase-locked loop
386940840Apparatus for adaptive reverse power control for spread-spectrum communications
396934524Fine-stage automatic frequency compensation in post-detection short-range wireless applications
406920189Carrier recovery means
416909337Noncoherent pulse position and phase shift keying transmission/reception system and a transmission/reception signal processing method therefor
426904104Technique for demodulating a linear modulated data signal in a communications system
436904103Receiving device and integrated circuit for reception
446885652Code division multiple access (CDMA) communication system
456873645Automatic power control system for a code division multiple access (CDMA) communications system
466868131Demodulation apparatus, broadcasting system and broadcast receiving apparatus
476859094Phase demodulation method for minimizing phase error in communication signals
486845133Method and device for processing signals of a digital transmission system

2004

496834086Demodulator and method for second harmonic cancellation
506831942MPSK spread spectrum communications receiver with carrier recovery and tracking using weighted correlation techniques
516831905Spread spectrum system assigning information signals to message-code signals
526831578Method and circuit arrangement for demodulation of a quadrature amplitude- or phase-modulated signal
536823181Universal platform for software defined radio
546816473Method for adaptive forward power control for spread-spectrum communications
556801516Spread-spectrum system for assigning information signals having different data rates
566788662Method for adaptive reverse power control for spread-spectrum communications
576775332Multi-stage receiver
586771721Method and apparatus for eliminating audio clicks in a radio receiver
596771715Demodulator using cordic rotator-based digital phase locked loop for carrier frequency correction
606748206Low-power-consumption radio receiver
616748036Radio receiving method and apparatus
626744809Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
636738414Radio and communication method using a transmitted intermediate frequency
646735425Telephone with a demodulator circuit with an improved local oscillator
656735261Calibration of a N-port receiver
666721301Centroid tracking for spread-spectrum communications
676714596BS digital broadcast receiver
686707805Method for initial power control for spread-spectrum communications
696704377Method of correcting frequency errors for coherently demodulated wireless communication systems
706697609Carrier reproducing apparatus and method of the same
716697350Adaptive vector correlator for spread-spectrum communications
726693983Method and system for detection of short digital radio messages
736690748Receiver with improved digital intermediate to base band demodulator
746690747Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing
756690745Circuit for detecting the phase of received signal
766678342Absolute-phasing synchronization capturing circuit
776678336Hierarchical transmission digital demodulator
786674812High IF frequencies with a lower frequency logic based FSK modulation selecting a harmonic alias and demodulation using sub-sampling techniques
796674791Automatic power control system for a code division multiple access (CDMA) communications system
806674788Automatic power control system for a code division multiple access (CDMA) communications system

2003

816662000Synchronisation method and device for a communication receiver
826639951Digital demodulator
836633600Traffic lights in a code division multiple access (CDMA) modem
846628926Method for automatic frequency control
856621857Carrier tracking loop for direct sequence spread spectrum systems
866621332Demodulator and demodulation method of DQPSK system with reduced circuit scale
876614856Intermediary frequency input QPSK demodulator
886608826Continuously adjustable bandwidth discrete-time phase-locked loop
896603824Method for demodulating a carrier wave modulated by a digital symbol sequence
906603821Wireless communication terminal capable of correctly specifying position of burst and having small frequency error of recovered carrier
916603820Demodulator having rotation means for frequency offset correction
926603819Radio symbol synchronization and doppler estimation techniques
936603349Doppler learning phase lock loop for burst demodulator
946590945Method and apparatus for frequency offset compensation
956587523Radio signal receiving apparatus and a method of radio signal reception
966587518Synchronous BPSK decoder
976587517Multi-stage receiver
986571088Automatic frequency control circuit
996570941Receiver and phase extraction circuit
1006563858Method of performing antenna diversity in spread spectrum in wireless local area network
1016560303Joint frame, carrier and clock synchronization scheme
1026560298Method and apparatus for concurrent synchronization and improved automatic frequency control in a communication device
1036556636Digital communication apparatus having level controller with a disturbance detection unit
1046549588Communications system and corresponding receiver unit
1056539215Down converter and demodulator using a three port junction
1066526103Multi-stage receiver
1076522703Estimating frequency offset to demodulate a packet of phase-modulated symbols
1086522702Radio data communication terminal
1096519300System and method for automatic frequency correction in a pilot symbol assisted demodulator
1106507627Direct conversion receiving apparatus with DC component cut function

2002

1116501807Data recovery system for radio frequency identification interrogator
1126493397Radio communication device and radio communication method
1136487240Apparatus for receiving and recovering frequency shift keyed symbols
1146477208Composite trellis system and method
1156473471Slope drift and offset compensation in zero-if receivers
1166473469Local communication system and apparatus for use therein
1176470056Offset QPSK modulation analytic system
1186466630Symbol synchronization in a continuous phase modulation communications receiver
1196459743Digital reception with radio frequency sampling
1206456672Automatic frequency control communication system
1216456668QPSK modulated backscatter system
1226456608Adaptive vector correlator using weighting signals for spread-spectrum communications
1236452983Demodulator for improving reception performance in satellite and Mobile communications
1246449470Method and device for estimating the frequency offset in a signal received by a mobile-telephone demodulator
1256449322Maximum likelihood detection of MPSK bursts with inserted reference symbols
1266445908Dynamic temperature compensation and stage selection in pilot signal acquisition
1276445751Estimation of frequency offset in a communication system
1286445736GSM baseband receiver arrangement using digital signal processing
1296442383Demodulator and digital wireless communication receiver
1306442219Simultaneous decoding and phase synchronization using the criterion of maximum likelihood
1316438177Digital satellite broadcasting receive in which loop bandwidth of PLL circuit is changed at the time of centering
1326400784Synchronization system and method for digital communication systems
1336396884Automatic frequency control circuit
1346393599Multi-chip data detector implementation for symmetric differential phase shift keying modulation formats
1356393073Method of frequency offset estimation and correction for adaptive antennas
1366393067Differential detection receiver
1376389089Method of searching for pilot signals
1386381264Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
1396377634Circuit for reproducing bit timing and method of reproducing bit timing
1406377616Calibration of n-port receivers
1416363125Non-coherent six-port receiver
1426363106Method and apparatus for despreading OQPSK spread signals
1436363102Method and apparatus for frequency offset correction
1446359935Method for iterative demodulation and decoding for a system with coding and differential demodulation
1456356608Method, apparatus, and system for determining a location of a frequency synchronization signal
1466341146Phase-shift-keying demodulator and demodulation method using a period-width windowing technique
1476339624Trellis decoding with multiple symbol noncoherent detection and diversity combining

2001

1486317452Method and apparatus for wireless spread spectrum communication with preamble sounding gap
1496314145Tracking carrier timing
1506310924Digital demodulator
1516310513Demodulator and demodulation method for demodulating quadrature modulation signals
1526301317Synchronization system and method for digital communication systems
1536297691Method and apparatus for demodulating coherent and non-coherent modulated signals
1546295473Digital delay line receiver for use with an implantable medical device
1556289069Digital filter for rotation correction loop of a QPSK or QAM demodulator
1566282236Modem designs, and systems using the modem designs for communicating information between a number of remote locations and one or more central locations
1576278754Demodulation of asynchronously sampled data by means of detection-transition sample estimation in a shared multi-carrier environment
1586275543Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing
1596272168Code sequence generator in a CDMA modem
1606259748Signal offset elimination
1616256359RDS signal detection device
1626246730Method and arrangement for differentially detecting an MPSK signal using a plurality of past symbol data
1636246281Absolute phasing circuit
1646236687Decision directed phase locked loop (DD-PLL) for use with short block codes in digital communication systems
1656229843Pilot adaptive vector correlator
1666222874Frequency acquisition method for direct sequence spread spectrum systems
1676219534Radio communication apparatus
1686215778Bearer channel modification system for a code division multiple access (CDMA) communication system
1696212174Capacity management method for a code division multiple access (CDM) communication system
1706208617Channel tracking in a mobile receiver
1716204725Circuit for demodulating digital signal undergoing different modulation schemes
1726198908System and a method for transfer of a digital information carrying signal
1736195400Two-mode demodulating apparatus
1746195399Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal
1756192085Circuit arrangement with a data sequence generator
1766188716Radio and communication method using a transmitted intermediate frequency
1776185260Radio communication device using quadrature modulation-demodulation circuit
1786181751Multi-stage detection system in digital demodulator
1796178194Cellular mobile telephone system
1806177835Method and apparatus for high data rate demodulation
1816175726Receiver architecture for the receiving of angle-modulated/angle-keyed carrier signals
1826175269Demodulation unit and method of demodulating a quadrature
1836172632Bipolar FSK digital waveform synthesizer for modem systems
1846169448Digital demodulator

2000

1856157619Code division multiple access (CDMA) communication system
1866151371Automatic frequency control circuit
1876148184Radio frequency zero if direct down converter
1886144708Phase-locked loop circuit with equalizer and phase locking method
1896140869Device for demodulating a binary phase-shift keyed signal
1906134286Synchronization techniques and systems for radiocommunication
1916130577Digital demodulators for phase modulated and amplitude-phase modulated signals
1926127884Differentiate and multiply based timing recovery in a quadrature demodulator
1936122329Radio frequency identification interrogator signal processing system for reading moving transponders
1946118831Data demodulator device
1956115432High-frequency signal receiving apparatus
1966100755Phase decision circuit
1976097766Timing phase synchronization detecting circuit and demodulator
1986091789Method and device for phase modulated signals
1996091786Method and apparatus in a communication receiver for estimating symbol timing and carrier frequency
2006081563AFC circuit of digital demodulation device
2016081550Method of testing clock paths and network elements for carrying out the method
2026075980Interference suppression in RF signals
2036075826Method and apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitting data
2046075410Method and device for digitally demodulating a frequency modulated signal
2056075408OQPSK phase and timing detection
2066072992High-frequency device
2076072841Block phase estimator for the coherent detection of non-differentially phase modulated data bursts on rician fading channels
2086072785Differential PSK signalling in CDMA networks
2096072770Method and system providing unified DPSK-PSK signalling for CDMA-based satellite communications
2106069924Differential detector with error correcting function
2116067325Modem designs, and systems using the modem designs for communicating information between a number of remote locations and one or more central locations
2126064702Four-stage phase demodulation low frequency wireless mouse device
2136061390P-code enhanced method for processing encrypted GPS signals without knowledge of the encryption code
2146055231Continuously adjusted-bandwidth discrete-time phase-locked loop
2156052571Tuner for PSK or PAM data applications
2166052418Frequency error measuring apparatus and radio apparatus
2176046630.pi./4 QPSK digital demodulating apparatus and a method thereof
2186044118Method for adjusting the frequency of an oscillator for a receiver circuit
2196038267Digital demodulator, maximum-value selector, and diversity receiver
2206034564Demodulator using quasi-synchronous detection to demodulate modulated quadrature input signals
2216031880Carrier recovery in communications system
2226028888Single-channel and multi-channel coherent demodulation devices with no pilot signal, and corresponding receiving system using a plurality of diversity paths
2236021503Bit synchronization for interrogator
2246021164Digital radio communication system having reduced phase-locked loop, and its synchronization
2256021157Fast phase estimation in digital communication systems
2266018552Differential detection receiver
2276018551Method and apparatus for reproducing carrier
2286016329Method and apparatus for preamble-less demodulation

1999

2295991344Mobile communication device and method for setting AFC initial value
2305991332Adaptive matched filter and vector correlator for a code division multiple access (CDMA) modem
2315991329Automatic power control system for a code division multiple access (CDMA) communications system
2325987074Digital communication demodulator, digital communication demodulation method and digital demodulation circuit
2335982821Frequency discriminator and method and receiver incorporating same
2345974096Digital quadrature detection circuit
2355970101Phase detecting method by analog-to-digital conversion
2365966405Frequency deviation measuring device
2375963586Method and apparatus for parallel noncoherent correlation of a spread spectrum signal
2385963585MSK spread-spectrum receiver which allows CDMA operations
2395960044Apparatus and method for block phase estimation
2405960040Communication signal processors and methods
2415953385Method and device for detecting the error on the frequency of a carrier
2425953370Apparatus for receiving and correlating a spread spectrum signal
2435949826Data transmission and reception system
2445946360Frequency offset compensation using dotting sequences
2455946359Parameter measuring apparatus for digital quadrature modulation signals
2465945875.pi./n shift phase-shift keying demodulator
2475943370Direct conversion receiver
2485940446Maximum likelihood detection of MPSK bursts with inserted reference symbols
2495930518Arithmetic unit
2505930292Method and apparatus for improved autocorrelation in biphase modulated pseudorandom noise coded systems using tri-state demodulation
2515923030System and method for recovering a signal of interest from a phase modulated signal using quadrature sampling
2525920593Device for personal digital cellular telephones
2535917864Automatic frequency control circuit
2545914990Filtering in a receiver that uses log-polar signal processing
2555914985Digital demodulator
2565912919Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
2575909470Method and apparatus for decision directed demodulation using antenna arrays and spatial processing
2585905762Receiver synchronization using punctured preamble
2595901184Extended range voltage controlled oscillator for frequency synthesis in a satellite receiver
2605898739QPSK demodulator for obtaining phase by arithmetic operation
2615896306Group delay correction method and apparatus
2625896060DPSK demodulator which may be used in an interrogator of a remote intelligence communication system
2635883548Demodulation system and method for recovering a signal of interest from an undersampled, modulated carrier
2645881112Modulator with baseband to phase converter
2655881110Carrier phase synchronization by reverse playback
2665881100Method and apparatus for coherent correlation of a spread spectrum signal
2675878090Receiver synchronization using punctured preamble
2685875215Carrier synchronizing unit
2695875213GMSK communication device test system
2705875212Phase demodulation method and apparatus for a wireless LAN, by counting the IF period
2715872801Method of compensating for doppler error in a wireless communications system, such as for GSM and IS54
2725872538Frequency domain correction of I/Q imbalance
2735872480Programmable down-sampler having plural decimators and modulator using same
2745867533Digital delta mode carrier sense for a wireless LAN
2755862187MPSK demodulator
2765856998Method and apparatus for correlating a continuous phase modulated spread spectrum signal

1998

2775848104Demodulator of receiver used for communications
2785844943Method and converter for converting rectangular signals to phase signals
2795841816Diversity Pi/4-DQPSK demodulation
2805841815Data receiver for correcting a phase of a received phase-modulated signal
2815838797Secure communication by encryption/decryption of vector at PSK modulation/detection stage
2825838737Method and apparatus for estimating PSK modulated signals
2835832044Transmitter antenna diversity and fading-resistant modulation for wireless communication systems
2845832028Method and apparatus for coherent serial correlation of a spread spectrum signal
2855828707Differential detecting apparatus for detecting phase difference of phase-modulated signal
2865828705Carrier tracking technique and apparatus having automatic flywheel/tracking/reacquisition control and extended signal to noise ratio
2875825810MSK spread-spectrum receiver which allows CDMA operations
2885822375Method for detecting received signal sequences
2895822339Data decoder and method to correct inversions or phase ambiguity for M-ary transmitted data
2905815568Disabling tone detector for network echo canceller
2915815099Method and apparatus for differentially decoding signals
2925815035Demodulating circuit, demodulating apparatus, demodulating method, and modulating/demodulating system of acoustic signals
2935812942Balanced differential radio receiver and method of operation
2945812611Frequency estimating circuit and AFC circuit using the same
2955808509Receiver and demodulator for phase or frequency modulated signals
2965799047Carrier synchronization unit and synchronization method
2975799038Method for measuring modulation parameters of digital quadrature-modulated signal
2985799034Frequency acquisition method for direct sequence spread spectrum systems
2995799010Code division multiple access (CDMA) communication system
3005796787Receiver and method thereof
3015796783Digital transmission system
3025796776Code sequence generator in a CDMA modem
3035793250Phase demodulator selectively using a first or a second detector
3045790604Method and apparatus for automatic frequency correction acquisition
3055790602Receiver synchronization using punctured preamble
3065786725Reduced complexity maximum likelihood multiple symbol differential detector
3075774503Demodulation method and demodulation device
3085768291Method and apparatus for error mitigating a received communication signal
3095767738Apparatus and method for demodulating a modulated signal
3105764707Method and apparatus for improved phase shift keyed (PSK) signal demodulation
3115764171Quadrature signal conversion device
3125757865Carrier phase control circuit
3135757862Demodulator, modulation and demodulation system, and demodulation method
3145757858Dual-mode digital FM communication system
3155757847Method and apparatus for decoding a phase encoded signal
3165754585Method and apparatus for serial noncoherent correlation of a spread spectrum signal
3175754584Non-coherent spread-spectrum continuous-phase modulation communication system
3185751187Method and device for phase-modulated signals
3195748687Spreading code sequence acquisition system and method that allows fast acquisition in code division multiple access (CDMA) systems
3205748046Phase locked loop with controllable response time
3215742637Fast phase estimation in digital communication systems
3225740204Digital radiocommuncation receiver
3235737694Highly stable frequency synthesizer loop with feedforward
3245732111Frequency error compensation for direct sequence spread spectrum systems
3255732109Phase detector
3265729577Signal processor with improved efficiency
3275729558Method of compensating for Doppler error in a wireless communications system, such as for GSM and IS54
3285727027PSK signal demodulation method and apparatus
3295727019Digital modem
3305717723Apparatus for use in equipment providing a digital radio link between a fixed radio unit and a mobile radio unit
3315712637Slope, drift and offset compensation in zero-IF receivers
3325710796Method and receiver for determining a phase error in a radio-frequency signal

1997

3335703910Digital radio receiver
3345696797Demodulator with baseband doppler shift compensation and method
3355692007Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation
3365684835Locally coherent QPSK detection with differential decoding for a fading channel
3375684832Maximum likelihood differential detecting method and differential detector thereof
3385680414Synchronization apparatus and method for spread spectrum receiver
3395671254Modulation, demodulation and antenna coupling circuits used in IC card reading/writing apparatus, and method of supplying power to the IC card
3405671253Apparatus for demodulating and decoding video signals encoded in different formats
3415666386Digital demodulating apparatus capable of selecting proper sampling clock for data transmission speed
3425661765Receiver and transmitter-receiver
3435659574Multi-bit correlation of continuous phase modulated signals
3445654989Method and apparatus for symbol timing tracking
3455651031Clock recovery circuit of demodulator
3465648982Spread spectrum transmitter
3475640431Method and apparatus for offset frequency estimation for a coherent receiver
3485640427Demodulator
3495640426Clock recovery circuit of demodulator
3505640424Direct downconverter circuit for demodulator in digital data transmission system
3515630228Double balanced mixer circuit with active filter load for a portable comunication receiver
3525629956Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal
3535627862Apparatus for demodulating phase modulated WAVE
3545627861Carrier phase estimation system using filter
3555627856Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators
3565625652Timing recovery controller and method for adjusting the timing of synchronizing windows in a PSK demodulator
3575625649Clock recovery circuit of demodulator
3585625643Modulator and demodulator apparatus
3595625573Fast acquisition of GMSK-modulated signal for CDPD applications
3605623520Correlation detector employing two level A/D conversion and arithmetic sign control
3615621767Method and device for locking on a carrier signal by dividing frequency band into segments for segment signal quality determination and selecting better signal quality segment
3625619537Maximum a posteriori decoder for digital communications
3635615230Process for transmitting digital signals which combines advantages of OQPSK and .pi./4-QPSK
3645610949Phase detector and a method determining the phase of received PSK symbols
3655610948Digital demodulation apparatus
3665610940Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal
3675608763Method and apparatus for decoding a radio frequency signal containing a sequence of phase values
3685604768Frequency synchronized bidirectional radio system
3695602879Clock recovering circuit for digital demodulator
3705602877Method and apparatus for information recovery in a radio communication device
3715598441Carrier acquisition technique for mobile radio QPSK demodulator
3725598439Method and apparatus for symbol clock phase recovery
3735598125Method for demodulating a digitally modulated signal and a demodulator
3745594758Frequency controller and method of correcting phase estimates in a PSK demodulator using frequency control
3755594757Method and apparatus for digital automatic frequency control
3765592506MSK spread-spectrum receiver which allows CDMA operations

1996

3775590158Method and apparatus for estimating PSK modulated signals
3785590157Data terminal comprising a demodulator for a FSK phase-coherent modulated signal
3795588027Digital demodulating method and circuit for use in a time-division multiple access channel
3805588026Method of compensating phase shift keying frequency offset
3815585761Demodulation of digital phase modulated signal
3825583890Error correction of MSK signals dependent on sample quality
3835579347Digitally compensated direct conversion receiver
3845579346Automatic frequency control method and circuit for use in a delay detection type demodulator
3855579345Carrier tracking loop for QPSK demodulator
3865578947Delayed detection type demodulator
3875574399Coherent PSK detector not requiring carrier recovery
3885572553Digital apparatus for broadband carrier-recovery
3895572551Carrier loop acquisition for staggered phase shift keying
3905568520Slope drift and offset compensation in zero-IF receivers
3915566210Data receiving apparatus
3925563908Modulator and demodulator apparatus
3935563537Frequency-controlled circuit
3945561665Automatic frequency offset compensation apparatus
3955559799Modulator and demodulator apparatus as well as modulation and demodulation method
3965557643Automatic frequency control system for GMSK-modulated signals
3975557222Delayed detection type demodulator
3985553098Demodulator with selectable coherent and differential data
3995550869Demodulator for consumer uses
4005550867Complex angle converter
4015550506DQPSK demodulator capable of improving a symbol error rate without decreasing a transmission rate
4025541966System and circuit for estimating the carrier frequency of a PSK numeric signal
4035541958Clock recovery circuit of demodulator
4045533069Method and apparatus for digital frequency compensation of carrier drift in a PSK demodulator
4055533060Multi-phase PSK signal decoder including phase display generator with phase correcting feedback
4065530382Delayed detection type demodulator
4075528634Trajectory directed timing recovery
4085528632Non-complex dual-correlation phase reversal detector and method
4095526381Robust non-coherent detector for .pi./4-DQPSK signals
4105524127Unique word detector and method for detecting a unique word within one of several windows offset in time
4115521944Circuit for a demodulator for a radio data signal in a radio receiver
4125521548Phase detector
4135519625System for characterizing phase-modulated signals using a time interval analyzer
4145517530Method and apparatus for dual demodulation of mobile channel signals
4155514998Method and system for demodulating GMSK signals in a cellular digital packet data system
4165511097Delay detection circuit
4175506873Demodulator for a phase shift keying (PSK) signal
4185504455Efficient digital quadrature demodulator
4195504454Demodulator for powerline carrier communications
4205500876Phase error canceller for QPSK signals using unique word detectors
4215500620Timing recovery for digital demodulation
4225499268Adaptive equalizer capable of compensating for carrier frequency offset
4235495510Phase synchronization device integrated into the demodulator stage of a receiver of multi-phase modulator signals
4245491724Mean phase predictor for maximum a posteriori demodulator
4255485108Delayed detection type demodulator
4265484987Delayed detection type demodulator

1995

4275475710Adaptive equalizer and receiver
4285473637Open-loop phase estimation methods and apparatus for coherent demodulation of phase modulated carriers in mobile channels
4295471499Minimum shift keyed saw device and method
4305469452Viterbi decoder bit efficient chainback memory method and decoder incorporating same
4315463664DQPSK delay detection circuit that produces stable clock signal in response to both I and Q signals
4325461643Direct phase digitizing apparatus and method
4335457423Radio data signal demodulator with clock signal recovery
4345455845Microwave receiver having coherent threshold detection
4355453715Communication device with efficient multi-level digital demodulator
4365452322Receiver for digital signals transmitted in the coded differential modulation mode
4375450446Demodulator for digital modulation signals
4385448594One bit differential detector with frequency offset compensation
4395446421Local oscillator phase noise cancelling modulation technique
4405444415Modulation and demodulation of plural channels using analog and digital components
4415442656Timing extraction device and data transmission device using the timing extraction device
4425440589Frequency offset dealing modulator and demodulator apparatus
4435440587Demodulator for digitally modulated wave
4445440268AFC circuit for QPSK demodulator
4455440267Demodulator
4465432819DPSK communications with Doppler compensation
4475430770Method and apparatus for composite signal separation and PSK/AM/FM demodulation
4485426669Quadrature demodulator
4495425058MSK phase acquisition and tracking method
4505422889Offset correction circuit
4515416800Mobile radio receiver for a radio transmission system
4525412695Method and device for removing frequency offset
4535412694Data demodulator
4545410573Digital phase-locked loop circuit
4555406218Phase demodulator receiving inputs from phase detector and binary phase detector
4565402449Process and device for converting digitally modulate high-frequency reception signals
4575388122Modulation and demodulation system
4585379323DQPSK delay detection circuit

1994

4595377232Frequency synchronized bidirectional radio system
4605376894Phase estimation and synchronization using a PSK demodulator
4615373247Automatic frequency control method and circuit for correcting an error between a received carrier frequency and a local frequency
4625369374Differential detection demodulator
4635367538Apparatus and method for direct phase digitizing
4645355092Relatively simple QPSK demodulator, that uses substantially all digital circuitry and an internally generated symbol clock, and circuitry for use therein
4655337331Method of coherent demodulation for phase shift keying and a device for implementing the method
4665335250Method and apparatus for bidirectional demodulation of digitally modulated signals
4675323425Direct conversion receiver for digital signals and method for demodulation of said signals
4685317602Base-band delayed detector with synchronizing circuit
4695313170Differential detection demodulator
4705311555Phase divider for complex signals
4715311545Modem for fading digital channels affected by multipath
4725311523Carrier phase synchronous type maximum likelihood decoder
4735309480Non-coherent quadrature demodulation of MSK signals
4745307380Delaying detection circuit
4755303269Optically maximum A posteriori demodulator
4765301210Coherent demodulating device with carrier wave recovering digital circuit
4775295162Digital demodulator which quantizes signal components according to different thresholds
4785295151Transition detection circuit for PSK signals using the SAW Chirp-Z algorithm (U)
4795291527Communication system and demodulator used in communication system
4805287197Signal demodulation device
4815287067Method and apparatus for demodulation with adaptive phase control in quasi-coherent detection
4825283815Tangental type differential detector for pulse shaped PI/4 shifted differentially encoded quadrature phase shift keying
4835282228Timing and automatic frequency control of digital receiver using the cyclic properties of a non-linear operation
4845278514MSK demodulator using one synchronous detector
4855276710Carrier frequency error detector capable of accurately detecting a carrier frequency error
4865276704SAWC phase detection method and apparatus

1993

4875272447Demodulator and demodulation method for a digital phase modulated signal
4885272446Digitally implemented fast frequency estimator/demodulator for low bit rate maritime and mobile data communications without the use of an acquisition preamble
4895270665Demodulator for continuously and accurately carrying out demodulating operation by a frequency multiplication method
4905268647Method and arrangement of coherently demodulating PSK signals using a feedback loop including a filter bank
4915260975Digital demodulator
4925260671Receiving circuit for demodulating an angle modulated signal
4935257291Circuit for evaluating frequency difference
4945255290Method and apparatus for combined frequency offset and timing offset estimation
4955247543Carrier aquisition apparatus for digital satellite communication system
4965245611Method and apparatus for providing carrier frequency offset compensation in a TDMA communication system
4975241567Circuit for demodulating PSK modulation signals
4985237287Demodulating method and apparatus particularly for demodulating a differential phase-shift keying signal
4995230009Method for deciding region of PI/4 shift quadriphase shift keying modulated signals
5005214674Method and apparatus for carrier synchronization acquisition in a digital burst mode communication system
5015212826Apparatus and method of DC offset correction for a receiver
5025208836Method for bit detection at the receiver end of differentially coded binary or quaternary PSK signals in differential-coherent demodulation
5035202901Digital discriminator for pulse shaped .pi./4 shifted differentially encoded quadrature phase shift keying
5045202644Receiver apparatus
5055195108System and method for determining absolute phase of a differentially-encoded, phase-modulated signal
5065177741Subscriber unit for wireless digital telephone system

1992

5075173663Demodulation circuit enabling independent recovery of the carrier and sampling timing
5085172070Apparatus for digitally demodulating a narrow band modulated signal
5095168507Automatic adaptive equalizer
5105164959Digital equalization method and apparatus
5115159705Frequency synthesizer circuit
5125157697Receiver employing correlation technique for canceling cross-talk between in-phase and quadrature channels prior to decoding
5135157344Digital quadrature phase detector for angle modulated signals
5145151926Sample timing and carrier frequency estimation circuit for sine-cosine detectors
5155151925Coherent demodulation method for a digitally modulated signal having a continuous phase and a constant envelope
5165144256Method and apparatus for demodulating a GMSK signal
5175142553Receiver with direct quadrature sampling of the input signal
5185142287Technique for demodulating and decoding MLS DPSK transmissions using a digital signal processor
5195136616Method of rapidly controlling the frequency of a coherent radio receiver and apparatus for carrying out the method
5205131014Apparatus and method for recovery of multiphase modulated data
5215131008DSP-based GMSK coherent detector
5225128968Apparatus for cancelling carrier phase jitters
5235126682Demodulation method and apparatus incorporating charge coupled devices
5245122758Differential phase demodulator for PSK-modulated signals
5255121070Phase demodulator for PSK-modulated signals
5265117441Method and apparatus for real-time demodulation of a GMSK signal by a non-coherent receiver
5275117440Digital quadrature phase detection
5285117195Data referenced demodulation of multiphase modulated data
5295101418Digital time-multiplexed quadrature frequency upconverter
5305099494Six channel digital demodulator
5315097220Circuit for demodulating PSK modulated signal by differential-defection
5325093848Method of controlling the frequency of a coherent radio receiver and apparatus for carrying out the method
5335084902Jitter canceller with an initial value setting circuit for an adaptive filter
5345079513Demodulator and radio receiver having such a demodulator
5355079512Quadrature demodulation of a data sequence following a particular signal sequence with a local reference carrier signal having a frequency different from a received carrier signal

1991

5365077755Digital signal processing system in modem
5375077531PSK signal demodulation system
5385067141Interpolator for varying a signal sampling rate
5395062123Kalman predictor for providing a relatively noise free indication of the phase of a carrier laden with noise
5405056122Phase-shift keyed demodulation apparatus
5415050176Direct modulation phase-shift-keying system and method
5425048058MSK modulation and differentially coherent detection transmission system
5435029186Method of demodulation in digital communication systems with multipath propagation
5445022048Programmable digital frequency-phase discriminator
5455020080Demodulation method and demodulator for digital signals with amplitudes of constant envelope, continuously modulated in phase and/or in frequency
5465017883Multiple symbol differential detection
5475012491Preamable detection circuit for digital communications system
5485008670Phase/digital conversion method and arrangements for implementing the method
5495007068Doppler-corrected differential detection system
5505001727Carrier and data recovery and demodulation system
5514996697Deglitching means for digital communication systems
5524995052Demodulation method
5534994802Subscriber unit for wireless digital telephone system
5544989220Method and apparatus for demodulating a class of M-ary phase shift keyed (PSK) signals

1990

5554980767Technique for determining signal dispersion characteristics in communications systems
5564977580Timing and carrier recovery in TDMA without preamble sequence
5574965810Digital differential phase-shift keyed decoder
5584961206Data modem system
5594959619Digital transmission demodulator including an automatic fault corrector
5604943983Subscriber unit for wireless digital telephone system
5614943982Baseband carrier phase corrector
5624942591Multiple phase PSK demodulator
5634941155Method and circuitry for symbol timing and frequency offset estimation in time division multiple access radio systems
5644939790PLL frequency stabilization in data packet receivers
5654926499Carrier phase controller for a receiver of phase modulated signals
5664922206Method of demodulation using split delay line
5674912422Demodulation system for PSK signals with low carrier to noise ratio and large frequency offset
5684893317Digital signals and frequency correction in a digital wireless system

1989

5694888793Phase correcting DPSK/PSK receiver with digitally stored phase correction derived from received data
5704885756Method of demodulating digitally modulated signals, and apparatus implementing such a method
5714881246Method and apparatus for demodulating a class of M-ary phase shift keyed (PSK) signals
5724881240AM equalizer circuit for digital systems
5734860318PSK detection using an IFM receiver
5744856031Adaptive multiharmonic phase jitter compensation
5754856025Method of digital signal transmission
5764853944Digital AM/FM/.phi.M demodulator
5774849991Method and circuitry for determining symbol timing for time division multiple access radio systems
5784849706Differential phase modulation demodulator
5794847868Non-coherent pattern detection
5804843615CPFSK communication system employing nyquist-filtered modulator/demodulator
5814841547Digital communication system
5824841470Surface acoustic wave device for differential phase shift keying convolving
5834835792Universal FM receiver for mobile communications
5844829566Apparatus for detecting and discriminating phase jumps in a periodic signal and its application to a telephone tone signal with phase inversions
5854829542PSK modem system having improved demodulation reliability
5864825448Subscriber unit for wireless digital telephone system
5874821261Packet transmission of digital signals over a high capacity channel, particularly over a satellite broadcasting channel
5884817116Digital radio communication system utilizing quadrature modulated carrier waves
5894810921Elastic surface wave device
5904807252Digital communication system
5914807251PSK modem system with improved demodulation reliability
5924799239Phase-coherent FSK signal demodulator
5934796028Apparatus for bidirectional data transmission

1988

5944785468Intermittent receiver
5954785255Digital FSK signal demodulator
5964760344Phase shift keying signal demodulation method and apparatus
5974746872Differential phase shift keying demodulator
5984737728Digitally processed demodulator for quadrature modulated signals
5994726038Digital communication system

1987

6004715047Digital differential phase shift keyed demodulator
6014714892Differential phase shift keying demodulator
6024712222Adaptive recursive phase offset tracking system
6034706300Optical heterodyne detection pulse receiving system and method
6044697183Means for non-contacting signal and energy transmission
6054694257Phase-coherent demodulation clock and data recovery
6064675881Arrangement for recovering a clock signal from an angle-modulated carrier signal having a modulation index m=0.5
6074669095Maximum distance from zero crossing MSK demodulator
6084656648Process for the noncoherent demodulation of a digital signal
6094651108Demodulation circuit having means for detecting phase difference
6104651104Frequency converter with automatic frequency control
6114647863Saw transition detector for PSK signals
6124639939Apparatus for cancelling periodic carrier phase jitters
6134634990Apparatus for demodulating differential phase shift keyed signals

1986

6144631486M-phase PSK vector processor demodulator
6154628271Differential phase shift keying demodulator
6164618830PSK demodulator using asynchronous local oscillator
6174612518QPSK modulator or demodulator using subharmonic pump carrier signals
6184608540Phase-shift keying demodulator
6194606051QPSK demodulator with I and Q post-detection data correction
6204603393Demodulator for constant envelope and continuous phase signals which are angle modulated by a train of binary symbols
6214599732Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format
6224584533Non-coherent BPSK demodulator
6234583048MSK digital demodulator for burst communications
6244583047Reception circuit for a wave modulated at one time in frequency by an analog signal and at another time in phase by a digital signal
6254577335Coherent data communications technique
6264573166Digital modem with plural microprocessors
6274563650Power line communication receiver with dual threshold signal interrogation capability

1985

6284555667Synchronous digital QPSK demodulator with carrier error correction
6294554509Frequency shift keyed demodulation system
6304530104Circuit for reducing errors in a data receiver
6314527278Method for correcting the frequency of a local carrier in a receiver of a data transmission system and receiver using this method
6324520493Adaptive recursive frequency offset tracking system
6334516079Coherent phase shift keyed demodulator for power line communication systems
6344514697Coherent phase shift keyed demodulator with improved sampling apparatus and method

1984

6354481640Spread spectrum modem
6364471313Demodulator for phase difference demodulated signals
6374466108TDMA/PSK Carrier synchronization without preamble
6384457005Digital coherent PSK demodulator and detector
6394455664Carrier data operated squelch
6404441194Triple bit non-coherent matched filter receiving system
6414438524Receiver for angle-modulated carrier signals

1983

6424416016Differential phase shift keyed receiver
6434414675MSK and OK-QPSK signal demodulator
6444412302Digital phase demodulation and correlation
6454392232Simplified transversal correlator for MSK and MSK related waveforms
6464379284Coherent phase shift keyed demodulator for power line communication systems
6474379266PSK Demodulator with automatic compensation of delay induced phase shifts
6484373151Stochastic demodulator for phase jump-modulated signals, operating in time divided up over several channels
6494371839Differentially coherent signal detector

1982

6504359692Rapid acquisition shift keyed signal demodulator
6514348641Digital baseband carrier recovery circuit
6524320517Method and device for effecting the initial adjustment of the clock in a synchronous data receiver
6534320345Adaptive differential PSK demodulator
6544318049Carrier recovery circuit for use in a multi-level phase shift keying demodulator
6554317210Coherent receiver for angle-modulated data signals
6564313103Digital demodulator
6574311964Coherent phase shift keyed demodulator for power line communication systems

1981

6584246654Digital coherent phase demodulator

1980

6594242641Methods and apparatus for demodulating a differentially phase-modulated signal
6604225964Detection means for providing multiple baud values per individual baud period of a carrier signal to obviate baud timing ambiguities
6614218769Means for subdividing a baud period into multiple integration intervals to enhance digital message detection
6624216543Means for deriving baud timing from an available AC signal
6634190802Digital demodulator for phase shift keyed signals

1979

6644180779QPSK Demodulator with two-step quadrupler and/or time-multiplexing quadrupling
6654168470Two-bit A/D conversion apparatus without a signal derived automatic gain control
6664165488Derangement detector in a receiver of a system for data transmission by means of phase modulation of a carrier
6674138644Adaptive phase detection method and apparatus

1978

6684128828Differential detection systems with non-redundant error correction
6694121050Differential tri-phase shift keyed modulation
6704088957Method and apparatus for synchronously detecting a differentially encoded carrier signal
6714074119Code word determination

1977

6724061977Phase tracking network
6734059805Phase lock loop carrier generator for receiver of phase modulated carrier pulse signals
6744057759Communication receiving apparatus
6754054841Differential demodulators using surface elastic wave devices
6764047153Statistical data detection method and apparatus
6774035581Code word detecting method
6784029903Receiver for PSK digital signals
6794019149Correlative data demodulator
6804007331Apparatus for demodulation of relative phase modulated binary data
6814007330Method and apparatus for demodulation of relative phase modulated binary data

1976

6823997847Digital demodulator for differentially encoded phase-shift-keyed data
6833993956Digital detection system for differential phase shift keyed signals
6843991377Differential phase shift keying demodulator
6853990015Differential phase shift keyed detector utilizing a circulating memory
6863987422System for detecting signal quality of a phase-modulated wave
6873983546Phase-to-pulse conversion circuits incorporating Josephson devices and superconducting interconnection circuitry
6883980962Demodulators
6893972000Phase filter for reducing the effects of the noise components altering discrete phase modulated signals
6903956623Digital phase detector
6913947777Circuit arrangement for the demodulation of a phase-modulated signal
6923944939Demodulator assembly for trains with differential phase modulation
6933943285Multiplexed data modem
6943938052Digital demodulator for phase-modulated waveforms
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017