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2017

19608844System and method for performing channel estimation on an OFDM signal
29595984Concept for transmitting and receiving an information symbol
39590803Timing error processor that uses the derivative of an interpolator function
49577786Pilot symbol generation for highly-spectrally-efficient communications
59553748Synchronous demodulator electronic circuit for phase modulation signals

2016

69520988Adaptation to 3-phase signal swap within a trio
79503304Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
89497056Conveying metadata by modulation of pilot carriers in COFDM broadcasting
99491018Carrier phase and amplitude estimation for phase shift keying using pilots and data
109473337Carrier recovery in a QAM receiver
119467318Communication system, receiving device, and semiconductor device
129467251Method and system for forward error correction decoding with parity check for use in low complexity highly-spectrally efficient communications
139455855Phase shifter chip radio frequency self-test
149444554Digital coherent receiving apparatus
159444503Active signal processing personal health signal receivers
169432231Digital frequency modulation receiver with frequency variation signal and demodulation method used by the same
179426008Signal processing device and method
189413518Clock data recovery circuit
199405616Reliability metric for decoding hypothesis
209356810Semiconductor integrated circuit and operating method thereof
219325550Frequency-domain windowing for precision position, navigation, and timing (PNT) estimation
229319052Polar receiver with reduced amplitude-phase distortion
239306782Systems and methods for narrowband signal quadrature error correction
249304535Baud rate phase detector with no error latches
259281978Energy efficient highway addressable remote transducer soft modem
269281977Apparatus and method for separating two phase-modulated signals having different amplitudes
279253004Apparatus and method for signal phase control in an integrated radio circuit
289246727Reception of phase-shifted signal sequences in diversity reception
299231805Device for carrier phase recovery
309231649Method for generating unambiguous correlation function for TMBOC(6,1,4/33) signal based on equally split partial correlation functions, apparatus for tracking TMBOC signals and satellite navigation signal receiver system

2015

319184965Energy efficient highway addressable remote transducer soft modem
329184964Low symbol rate rapid carrier acquisition with extremely large frequency offset for digital communication receiver
339184905Phase compensation receiver
349154359Packet mode auto-detection in multi-mode wireless communication system, signal field transmission for the packet mode auto-detection, and gain control based on the packet mode
359137070Apparatus and method for signal phase control in an integrated radio circuit
369137068Wireless communications device having temporary correlation matrix with time inversion and related methods
379124393End of communication detection
389112595Transmission device, reception device, and radio communication method
399083589Active signal processing personal health signal receivers
409083588Polar receiver with adjustable delay and signal processing metho
419059889Polar multi-symbol delay detector for carrier phase and frequency recovery for coherent transmission
429054926Reception of phase-shifted signal sequences in diversity reception
439054871Physical key-protected one time pad

2012

448159288Low power BPSK demodulator

2011

457991070Wavelength transmission system and method using 3-dimensional LDPC-coded modulation

2008

467456682Demodulator and phase compensation method thereof

2005

476959054Filter bank and receiver for processing continuous phase modulated signals
486959051Clock regenerator for use in demodulating digital modulated signals
496947512Carrier reproducing circuit
506940923Demodulating device, broadcasting system, and semiconductor device
516909738Method in a receiver and a receiver
526903603Phase detection circuit and receiver
536891907Frequency offset correction system and correction method
546891882Receiver algorithm for the length 4 CFC
556882692Fast transform system for an extended data rate WLAN system
566879646Quadrature amplitude modulation demodulator and receiver
576868129Demodulator for a radio receiver and method of operation
586842495Dual mode QAM/VSB receiver

2004

596823181Universal platform for software defined radio
606813321Digital demodulator
616810097Carrier reproduction circuit, receiver, loop filter circuit, and oscillator circuit
626807242Apparatus and a method for calculation of a correlation value corresponding to a frequency error, and a recording medium with a recorded correlation value calculation program
636798855Method and arrangement for fast synchronization of two carrier signals
646778613Frequency and phase estimation for MPSK signals
656775334Equalization and decision-directed loops with trellis demodulation in high definition TV
666775332Multi-stage receiver
676771714Timing recovery using the pilot signal in high definition TV
686765972Carrier synchronization type demodulator for PSK signal
696748037Digital broadcasting receiver
706741645Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
716735262Apparatus and method of decision-directed carrier recovery based on LMS method
726727936NTSC interference rejection filter
736721366Phase tracking apparatus and method for continuous phase modulated signals
746717993Receiver
756704375Device for the homodyne reception of optically phase-keyed signals
766704344Broad-brand MPSK spread spectrum communications receiver with carrier recovery and tracking using correlation techniques
776700940Carrier reproduction circuit
786700928Tetrahedron modem
796697440Demodulator of receiver
806697437Receiving apparatus
816696900Method for demodulating PSK modulated signals
826693978Carrier reproducing circuit
836683921Received-signal absolute phasing apparatus of receiver
846678342Absolute-phasing synchronization capturing circuit

2003

856671342Phase detectors in carrier recovery for offset QAM and VSB
866650718Timing reproducer and demodulator comprising this
876643321Method for rapid synchronization of a point to multipoint communication system
886639953Apparatus and method for efficient binary phase shift key data demodulation
896639952Demodulator synchronization loop lock-in detection circuit
906636570Phase detection apparatus for compensating phase rotation error
916631174Automatic frequency control apparatus
926625237Null-pilot symbol assisted fast automatic frequency control (AFC) system for coherent demodulation of continuous phase modulation (CPM) signals and method for implementing same
936625230Multi-frequency superposition receiver method
946624691Demodulator for processing digital signal
956621880Digital IF receiver
966606357Carrier injecting waveform-based modulation scheme for reducing satellite transponder power requirements and earth terminal antenna size
976597728Device and method for correcting local oscillation frequency of radio reception device according to pilot synchronous detection
986587517Multi-stage receiver
996587428Information record disc and information recording apparatus
1006570936Frequency error estimation method and system for a QPSK demodulator
1016567480Method and apparatus for sampling timing adjustment and frequency offset compensation
1026563858Method of performing antenna diversity in spread spectrum in wireless local area network
1036560298Method and apparatus for concurrent synchronization and improved automatic frequency control in a communication device
1046539071Frequency correction at the receiver end in a packet transmission system
1056532271Carrier recovery and doppler frequency estimation
1066526103Multi-stage receiver
1076522687Data transmitter and receiver of a DS-CDMA communication system
1086504883Synchronous detector
1096504867Digital matched filtering for signal estimation in a digital receiver

2002

1106496547Digital FM receiver employing combined sample-and-hold and integrate-and-dump detectors for improved bit error rates
1116493409Phase detectors in carrier recovery for offset QAM and VSB
1126493396Phase shift key burst receiver having improved phase resolution and timing and data recovery
1136480150Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
1146466086Quadrature demodulator with phase-locked loop
1156463106Receiver with adaptive processing
1166456671Decision feedback phase tracking demodulation
1176452376Method of estimating the carrier frequency of a phase-modulated digital signal
1186449470Method and device for estimating the frequency offset in a signal received by a mobile-telephone demodulator
1196438164Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
1206434091Information record disc and information recording apparatus
1216426982Low complexity multiple bits matched filter
1226421399Frequency and phase estimation for MPSK signals
1236411661Digital timing recovery loop for GMSK demodulators
1246411659Timing recovery using the pilot signal in high definition TV
1256411658Demodulation device
1266404827Method and apparatus for linear predicting
1276396866Symmetric chirp communications acquisition method and apparatus
1286389082Receiver
1296381288Method and apparatus for recovering data from a differential phase shift keyed signal
1306377616Calibration of n-port receivers
1316370208Correlator for CDMA applications
1326363126Demodulator
1336353358Quadrature demodulation circuit with a pseudo locked state detection system
1346344871NTSC interference rejection filter
1356341023Multiple level modulation in a wavelength-division multiplexing (WDM) systems

2001

1366334203Error detecting method and device and signal demodulating method and device
1376317452Method and apparatus for wireless spread spectrum communication with preamble sounding gap
1386307898Phase error detector
1396304592Coherent detection using matched filter enhanced spread spectrum demodulation
1406301311Non-coherent, non-data-aided pseudo-noise synchronization and carrier synchronization for QPSK or OQPSK modulated CDMA system
1416297691Method and apparatus for demodulating coherent and non-coherent modulated signals
1426285721Method for assisting simple synchronization to the carrier of a dispersed-energy QPSK signal
1436282246Frequency modulation method and modem unit employing such method
1446278725Automatic frequency control loop multipath combiner for a rake receiver
1456278403Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
1466263011Receiver for spread spectrum communication system capable of shortening acquisition time
1476246715Data transmitter and receiver of a DS-CDMA communication system
1486240147Auto frequency control apparatus
1496232761Frequency estimating system
1506226323Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
1516222891Timing recovery using the pilot signal in high definition TV
1526219374Structure of a coherent dual channel QPSK transceiver using pilot symbols in a code division multiple access system
1536219088NTSC interference rejection filter
1546218896Vectored demodulation and frequency estimation apparatus and method
1556215830Carrier control loop for a receiver of digitally transmitted signals
1566208201Recovery of a carrier signal from a modulated input signal
1576195400Two-mode demodulating apparatus
1586192091Circuit for reproducing a clock from a multilevel QAM signal
1596191649Quadrature demodulator and method for quadrature demodulation

2000

1606163276System for remote data collection
1616163208One bit digital phase shift keyed carrier recovery and demodulator circuit
1626160858MSK signal processing in a GPS correlator channel
1636157686Diversity apparatus with improved ability of reproducing carrier wave in synchronous detection
1646157683Method and system for automatic invariancy compensation in digital communication receivers
1656154483Coherent detection using matched filter enhanced spread spectrum demodulation
1666148040Precoded gaussian minimum shift keying carrier tracking loop
1676125151Carrier recovery circuit
1686122328Fast-acting Costas loop
1696104237Method for estimating phase in demodulator
1706097768Phase detector for carrier recovery in a DQPSK receiver
1716085351Synchronization method
1726078578Communication apparatus
1736072992High-frequency device
1746072842Carrier-recovery loop with stored initialization in a radio receiver
1756055281Passband DQPSK detector for a digital communications receiver
1766055280High data rate digital demodulator and bit synchronizer
1776052571Tuner for PSK or PAM data applications
1786052410Transmission apparatus, reception apparatus and communication apparatus as well as modem signal transmission and reception method
1796023491Demodulation apparatus performing different frequency control functions using separately provided oscillators
1806016328Method and apparatus for the synchronization of a signal receiving station

1999

1816005889Pseudo-random noise detector for signals having a carrier frequency offset
1826002723Digital receiver having programmable complex threshold detectors and threshold interpreters
1835991342Frequency error detector
1845982200Costas loop carrier recovery circuit using square-law circuits
1855970105Apparatus and method for efficient wireless communications in the presence of frequency error
1865963600Micro-controller based frequency calibration
1875963586Method and apparatus for parallel noncoherent correlation of a spread spectrum signal
1885956375Fast-acting Costas loop
1895953370Apparatus for receiving and correlating a spread spectrum signal
1905949823Data communication system and radio IC card system
1915943380Robust phase estimator and recoverer for digital signals affected in particular by phase jitter
1925937013Subharmonic quadrature sampling receiver and design
1935933059Method and apparatus for controlling frequency synchronization in a radio telephone
1945930306Device for correcting phase noise in a digital receiver
1955920555Pilot assisted direct sequence spread spectrum synchronization apparatus
1965912930Phase shift keying signal demodulation method and device
1975909148Carrier phase synchronizing circuit
1985905762Receiver synchronization using punctured preamble
1995898699Digital broadcast receiver and signal level display method
2005894499Direct conversion receiver having filter with cut-off frequency switching means
2015883930Digital PLL circuit and actuating method
2025881111Frequency sweep circuit
2035881100Method and apparatus for coherent correlation of a spread spectrum signal
2045878090Receiver synchronization using punctured preamble
2055867059Demodulating system for MSK and GMSK signal using a fast fourier transform converter
2065861773Circuit for detecting the locked condition of PSK or QAM
2075857003Digital radio having improved modulation and detection processes
2085856998Method and apparatus for correlating a continuous phase modulated spread spectrum signal

1998

2095844948System and method for digital tracking and compensation of frequency offset error in a satellite receiver
2105838736Method and apparatus for generating carriers for phase demodulation having at least two phase states, and a corresponding demodulation stage
2115832044Transmitter antenna diversity and fading-resistant modulation for wireless communication systems
2125832028Method and apparatus for coherent serial correlation of a spread spectrum signal
2135828709Apparatus and method for improving stability of transmitting frequency by using costas loop section in communication system of half duplex transmitting method
2145828692Baseband demodulator for polar or rectangular modulated signal in a cordless spread spectrum telephone
2155825807System and method for multiplexing a spread spectrum communication system
2165822366Transceiver and method for generating and processing complex I/Q-signals
2175821782Frequency synthesis using a remodulator
2185818297Digital demodulator for a phase-modulated signal
2195815535Carrier recovery apparatus
2205812608Method and circuit arrangement for processing received signal
2215809084Data receiving in a digital mobile communication
2225809009Demodulator apparatus for digital radio communication receiver providing pseudo-coherent quadrature demodulation based on periodic estimation of frequency offset
2235790602Receiver synchronization using punctured preamble
2245774512Higher order digital phase loop filter
2255768323Symbol synchronizer using modified early/punctual/late gate technique
2265768321Automatic frequency control unit which detects a frame pattern in a phase modulation signal
2275768319GPS data collection in high noise-to-signal ratio environments
2285767738Apparatus and method for demodulating a modulated signal
2295761210Signal processing apparatus and method
2305757847Method and apparatus for decoding a phase encoded signal
2315754585Method and apparatus for serial noncoherent correlation of a spread spectrum signal
2325754584Non-coherent spread-spectrum continuous-phase modulation communication system
2335751776Receiver for a digital communication system
2345740202Method and apparatus for digitally evaluating the phase of a modulated carrier
2355734972Automatic frequency controller
2365727030Automatic frequency control circuit applicable to a mobile communication system
2375727028Method and apparatus for receiving a signal in a digital radio frequency communication system
2385717715Signal processing apparatus and method
2395706313Soft decision digital communication method and apparatus

1997

2405703526Circuit for detecting the locked condition of PSK or QAM demodulators
2415699385Method and apparatus for locating and tracking a QPSK carrier
2425692020Signal processing apparatus and method
2435692014Subsampled carrier recovery for high data rate demodulators
2445692007Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation
2455680414Synchronization apparatus and method for spread spectrum receiver
2465668831Signal processing apparatus and method
2475668749Circuit for performing arithmetic operations in a demodulator
2485659574Multi-bit correlation of continuous phase modulated signals
2495659573Method and apparatus for coherent reception in a spread-spectrum receiver
2505656971Phase demodulator having reliable carrier phase synchronization
2515655090Externally controlled DSP with input/output FIFOs operating asynchronously and independently of a system environment
2525652769Costas loop and data identification apparatus
2535648986Receiver in digital radio communication device with selective equalization
2545648982Spread spectrum transmitter
2555640425Fast-acting costas loop
2565640125Digital PSK-type demodulator having clock recovery before carrier recovery
2575635864Comparator circuit
2585629956Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal
2595627856Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators
2605625652Timing recovery controller and method for adjusting the timing of synchronizing windows in a PSK demodulator
2615621755CMOS technology high speed digital signal transceiver
2625619524Method and apparatus for coherent communication reception in a spread-spectrum communication system
2635614861N-phase modulated signal demodulation system with carrier reproduction
2645610949Phase detector and a method determining the phase of received PSK symbols
2655610940Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal
2665602881Receiver for a digital communication system
2675594758Frequency controller and method of correcting phase estimates in a PSK demodulator using frequency control

1996

2685586148Coherent detection system
2695579347Digitally compensated direct conversion receiver
2705568521Phase lock indicator circuit for a high frequency recovery loop
2715566211Automatic frequency control method and apparatus therefor
2725563537Frequency-controlled circuit
2735550871Satellite communication receiving apparatus
2745548619Radio receiver apparatus of orthogonal detection type comprising local oscillator means with improved automatic frequency control arrangement
2755548618Device for detecting BPSK modulated singular words suitable for a TDMA analog modem and detection method used therein
2765544200Acquisition of carrier phase and symbol timing through joint estimation of phase and timing adjustments
2775533059Carrier phase lock detecting apparatus used in PSK-modulated signal receiver for satellite communication system
2785528633Tuner with quadrature downconverter for pulse amplitude modulated data applications
2795524127Unique word detector and method for detecting a unique word within one of several windows offset in time
2805504453Method and device for estimating phase error
2815500877Receiver for a superpose modulated signal
2825499273Method and apparatus for symbol clock recovery from signal having wide frequency possibilities
2835497402Automatic frequency control device for satellite communications ground system
2845497400Decision feedback demodulator with phase and frequency estimation
2855490176Detecting false-locking and coherent digital demodulation using the same
2865485489Carrier recovery circuit for offset QPSK demodulators

1995

2875450447Adaptive variable-gain phase and frequency locked loop for rapid carrier acquisition
2885446771Adaptive coherent signal detection method and apparatus
2895440266Demodulating apparatus having quick pull-in synchronization facility at instantaneous disconnection of input signal
2905438594Device for demodulating digital signals modulated by an alternating modulation constellation technique
2915432521Satellite receiver system having doppler frequency shift tracking
2925425057Phase demodulation method and apparatus using asynchronous sampling pulses
2935424688Frequency synthesizer apparatus incorporating phase modulation tracking means
2945423085Method and apparatus for digital automatic frequency control of TDM communications systems
2955422909Method and apparatus for multi-phase component downconversion
2965416803Process for digital transmission and direct conversion receiver
2975400363Quadrature compensation for orthogonal signal channels
2985399987Bi-phase shift keying signal demodulation circuit for RDS receiver

1994

2995376894Phase estimation and synchronization using a PSK demodulator
3005365185Frequency controlled loop for demodulating OOK and PSK signals
3015363415Carrier regenerating device correctly operable in mobile satellite communication
3025361400Apparatus and method for removing distortion in a received signal
3035347228BPSK demodulator using compound phase-locked loop
3045341402Automatic frequency control method and device for use in receiver
3055341105Quadratore demodulator circuit utilizing automatic frequency control signal and method thereof
3065325401L-band tuner with quadrature downconverter for PSK data applications
3075317598Portable test receiver for remote monitoring system
3085307021Phase-error detecting circuit for QDPSK demodulator
3095299231Method and device for estimating the carrier frequency of a modulated data signal
3105289506Automatic frequency control circuit
3115278514MSK demodulator using one synchronous detector

1993

3125260975Digital demodulator
3135255086Method and apparatus for RF data transfer in a CATV system
3145251324Method and apparatus for generating and collecting viewing statistics for remote terminals in a cable television system
3155241545Apparatus and method for recovering a time-varying signal using multiple sampling points
3165235612Method and apparatus for cancelling spread-spectrum noise
3175233631Device for recovering a carrier wave provided with a circuit for inhibiting dummy frequency acquisitions
3185229997Carrier recovery control with sequential FEC sync detection and frame sync detection
3195225902Automatic frequency selection in a bi-directional cable television system
3205214390Method and apparatus for partial response demodulation
3215208829Communication satellite system having an increased power output density per unit of bandwidth
3225203030Satellite transmission capturing method for GPS receiver
3235202643Demodulator for demodulating a .pi./4-shift DQPSK signal
3245195108System and method for determining absolute phase of a differentially-encoded, phase-modulated signal
3255189564Magnetic recording/reproducing method and apparatus
3265185765High speed data communication system using phase shift key coding
3275182760Demodulation system for phase shift keyed modulated data transmission
3285182749Receiver for recovering data in a forward and reverse direction in time
3295179578Coherent demodulator for .pi./4 shifted QPSK signal

1992

3305170131Demodulator for demodulating digital signal modulated by minimum shift keying and method therefor
3315163159Dual mode automatic frequency control
3325157694Coherent PSK demodulator using bit error rate and S/N ratio to establish synchronization
3335155590System for data channel level control
3345150384Carrier recovery method and apparatus having an adjustable response time determined by carrier signal parameters
3355150070Demodulator for biphase, suppressed-carrier PSK signals
3365148451Carrier regeneration device correctly operable in mobile satellite communication
3375142690Cable television radio frequency data processor
3385121071Lock detector for unbalanced QPSK demodulators
3395113415Detection of a particular signal sequence with no adverse influence of multipath transmission
3405105435Method and apparatus for cancelling spread-spectrum noise
3415093846Signal acquisition using modulation by a preselected code group
3425090028Method of and apparatus for synchronization by means of correlation
3435090027Coherent PSK demodulator with adaptive line enhancer
3445090025Token ring synchronization
3455086241Costas loop carrier wave reproducing circuit
3465081652Offset correction

1991

3475067139Coherent detector for QPSK modulation in a TDMA system
3485065107Phase-locked loop bandwidth switching demodulator for suppressed carrier signals
3495063387Doppler frequency compensation circuit
3505058136Coherent detection for QPSK modulation
3515056115Device for the division, at an optimum sampling rate, of a passband signal into its components on two carriers in quadrature
3525050176Direct modulation phase-shift-keying system and method
3535049830Carrier recovery system and digital phase demodulator
3545042052Carrier acquisition scheme for QAM and QPSK data
3555036296Frequency tracking circuit using samples equalized at different sampling instants of same clock period
3565031197Timing error detector
3575025455Phase ambiguity resolution for offset QPSK modulation systems
3585012491Preamable detection circuit for digital communications system
3594993048Self-clocking system

1990

3604977580Timing and carrier recovery in TDMA without preamble sequence
3614961206Data modem system
3624958360Circuit for recovering the carrier in digital transmission systems
3634949357Synchronizing circuit for offset quaternary phase shift keying
3644949356PCM receiver with lock state control
3654947409Apparatus for correcting frequency in a coherent receiver
3664941199Uplink power control mechanism for maintaining constant output power from satellite transponder
3674940951Phase lock recovery apparatus for phase locked loop circuit
3684937841Method and circuitry for carrier recovery for time division multiple access radio systems
3694933958Method for receiving carrier oscillations modulated with a useful signal
3704933952Asynchronous digital correlator and demodulators including a correlator of this type
3714933782Digital phase lock device
3724932070Mechanism for deriving accurate frequency reference for satellite communications burst demodulator
3734922506Compensating for distortion in a communication channel
3744920278Phase comparator
3754918393Phase control device
3764916405Smart sweep apparatus for data rate receivers
3774901332Noncoherent-coherent A.C. coupled base band AGC receiver
3784896336Differential phase-shift keying demodulator
3794894845Receiver for a phase-shift keyed carrier signal
3804894841Digital direct-sequence spread-spectrum modem

1989

3814890302Circuit for extracting carrier signals
3824887050Frequency control apparatus and method for a digital radio receiver
3834887042High speed multi-channel phase detector
3844879728DPSK carrier acquisition and tracking arrangement
3854871975Carrier recovery circuit for offset QPSK demodulators
3864871974Coherent phase shift keyed demodulator
3874871973Demodulator including sweep controller for controlling synchronization capture range
3884870660Variable frequency rate receiver
3894868896Optical superheterodyne receiver for, in particular, phase-shift modulated light
3904866734Receiver for spread spectrum communication
3914860321Lock detector for feedback loops
3924860320Method for recovering a control signal for controlling the phase of a local carrier signal
3934860319Apparatus for compensating for phase hits
3944860318PSK detection using an IFM receiver
3954859959Data demodulator carrier phase error detector
3964856027Carrier recovery phase-locked loop
3974853642Phase controlled demodulator for digital communications system
3984847872Method and arrangement for synchronizing a receiver in digital transmission systems
3994847578Method and device for detecting false locks between a reference signal and a signal to be demodulated by coherent digital demodulation
4004843616Method of obtaining a phase difference signal
4014841470Surface acoustic wave device for differential phase shift keying convolving
4024837786Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying
4034835790Carrier-to-noise detector for digital transmission systems
4044833416QPSK/BPSK demodulator
4054829260Phase-shift keyed carrier recovery
4064814719Unsymmetrical QPSK demodulator
4074811363Method for recovering a phase difference signal
4084807254Carrier wave recovery system
40948034388-phase phase-shift keying demodulator
4104800576Convolution data recovery circuit
4114795986Method and circuit for carrier synchronism recovery in PSK coherent demodulators

1988

4124787096Second-order carrier/symbol sychronizer
4134780887Carrier recovery circuitry immune to interburst frequency variations
4144774716Method for the transmission of digital data
4154773083QPSK demodulator
4164769816Qpsk demodulator
4174764940Modem for RF subscriber telephone system
4184764730Radio receiver demodulation system
4194757272Four phase PSK demodulator
4204744094BPSK demodulator with D type flip/flop
4214742533Soft decision digital communication apparatus
4224742532High speed binary data communication system
4234740997Band clock offset phase locked loop
4244730344Quadrature-quadrature phase shift keying with constant envelope

1987

4254713630BPSK Costas-type PLL circuit having false lock prevention
4264712221Carrier recovery of modulated signals
4274706263Data communications receiver operable in highly stressed environments
4284704582Gated demodulator for shaped BPSK signals
4294700363Data communication method and apparatus
4304694204Transistor circuit for signal multiplier
4314691318Data transmission system with error correcting data encoding
4324689806Receiver mode control for acquiring and tracking a signal
4334687999Circuit for recovering the carrier wave in digital transmission systems
4344686689Phase-locked loop circuit
4354682118Phase shift keying and phase modulation transmission system
4364682117Quadrature demodulation data receiver with phase error correction
4374680778Fast acquisition circuit for synchronous digital receiver operating in wideband noise
4384680777Quadrature-quadrature phase shift keying
4394680775Device for coding-decoding a binary digital signal bit stream for an "OQPSK" digital modulator-demodulator with four phase states
4404675883Arrangement for Carrier Recovery from Two Received Phase Shift Keyed Signals
4414672632Optimized communications system and method employing channel synthesis and phase lock detection
4424670887Multiplexed PSK demodulator
4434667334System for broadcasting data packets originating from different sources
4444663768Diversity system of selection type equipped with a code correction/switch circuit for receiving a PSK or QAM wave carrying differentially encoded signal
4454654864Phase synchronizing circuit
4464653071Carrier recovery circuit for PSK communication system
4474652838Phase randomization to reduce detectability of phase or frequency-modulated digital signals
4484652834Rapid acquisition demodulation system
4494644561Modem for RF subscriber telephone system
4504642573Phase locked loop circuit for demodulating suppressed carrier signals
4514641325Receiver for phase shift modulated carrier signals
4524641323Multi-phase PSK demodulator
4534639939Apparatus for cancelling periodic carrier phase jitters
4544639682Carrier reproducing circuit for phase shift keying signals
4554635279Arrangement for coherently generating sinusoids of different frequencies, and angle modulation data receiver using the arrangement

1986

4564631738Gain tracker for digital modem
4574628507Bit error detection circuit for PSK-modulated carrier wave
4584627079Method and apparatus for acquiring and tracking a communications signal
4594626911Digital data recovery circuit
4604622683Fast acquisition ringing filter MSK demodulator
4614614910Quarternary differential PSK demodulator
4624594727Synchronous receiver
4634592075Phase-shift keying demodulator
4644592071Recovery of carrier and clock frequencies in a phase or amplitude state modulation and coherent demodulation digital transmission system
4654592009MSK surface acoustic wave convolver
4664591797PSK demodulator having an AFC circuit
4674585998Method and device for coherent demodulation of a digitally modulated carrier
4684584652Apparatus and method for determining in-phase and quadrature-phase components
4694583238Synchronous data transmission system using a carrier modulated by an envelope of constant amplitude
4704583048MSK digital demodulator for burst communications
4714581586Crosstalk reduction in unbalanced QPSK detectors
4724580102Utilizing carrier construction
4734575684Differential phase shift keying receiver
4744571731PSK modem filter switch
4754570125FSK Demodulator with concurrent carrier and clock synchronization
4764569061Phase distortion adaptive detector of minimum shift keying data

1985

4774559634PSK Modem having dual-integrator voltage controlled oscillator
4784559499Direct microwave demodulator of PSK signals with automatic gain control
4794555667Synchronous digital QPSK demodulator with carrier error correction
4804549142Phase demodulator including variable phase shifter for controlling reference carrier
4814547738Phase shift demodulator
4824547736Phase lock loop PSK demodulator with sweep control circuit
4834542347Demodulator circuit with integrated automatic gain control
48445409488-Phase phase-shift keying demodulator
4854539524Method and coherent demodulators for MSK signal
4864538282Integrated circuit PSK modem phase locked loop
4874538120Carrier recovery loop for reception of quadraphase shift keyed signals
4884538111Circuit recovering the carrier of a signal amplitude and phase modulated by digital signals
4894531224Low signal-to-noise ratio symbol synchronizer
4904527278Method for correcting the frequency of a local carrier in a receiver of a data transmission system and receiver using this method
4914527275Correlation data communications system
4924525676PSK Demodulation system having carrier frequency variation compensation
4934519084Matched filter for combating multipath fading
4944519083Bilateral digital data transmission system
4954507617Carrier recovery circuit for a PSK modulated signal
4964503545System for evaluating transmission line impairments
4974501002Offset QPSK demodulator and receiver
4984491805BPSK And QPSK transmission systems having phase locked loop for regenerating the carrier wave

1984

4994484337Carrier wave regenerating circuit
5004481658FM-broadcasting system with transmitter identification by binary phase-modulated, differentially coded code signal
5014479253Phaselock receiver with input signal measuring capability
5024475218Carrier-recovery circuit
5034475217Receiver for phase-shift modulated carrier signals
5044472817Non-PLL concurrent carrier clock synchronization
5054470145Single sideband quadricorrelator
5064462109Receiver for phase-shift modulated carrier signals
5074461014Carrier regenerating circuit
5084458356Carrier recovery circuit
5094455680Method and apparatus for receiving and tracking phase modulated signals
5104450573Bit data operated squelch
5114445224Pull-in circuit for a digital phase locked loop
5124445094SMSK And MSK demodulator
5134439863Partial response system with simplified detection
5144439737Phase locked loop, as for MPSK signal detector
5154438355Phase canceller for carrier recovery network
5164426711Process for the transmission of service signals for a digital radio beam, as well as transmitter and receiver for using such a process

1983

5174423390Side lock avoidance network for PSK demodulator
5184420723Phase locked loop amplifier for variable amplitude radio waves
5194419759Concurrent carrier and clock synchronization for data transmission system
5204409562Phase correction circuit employing bandpass filters
5214394626Phase synchronizing circuit
5224392232Simplified transversal correlator for MSK and MSK related waveforms
5234389616Method and arrangement for the digital regulation of the carrier phase error in receivers of data transmission systems
5244387342Phase-shift keyed decoder
5254384357Self-synchronization circuit for a FFSK or MSK demodulator
5264383324Digital data transmission systems
5274380081Digital receiver for four-phase-modulated carrier
5284368542Phase canceller for carrier recovery network

1982

5294362997Quadriphase differential demodulator
5304355404Carrier recovery network for QPSK modems employing synchronized oscillators
5314355401Radio transmitter/receiver for digital and analog communications system
5324352199Method and device for detecting and interpreting a distress signal
5334352192Timing signal synchronization device
5344348641Digital baseband carrier recovery circuit
5354346472Method and apparatus for eliminating double bit errosion in a differential phase shift keying system
5364344178Costas loop QPSK demodulator
5374344041Biphase detector
5384339725Synchronous demodulator for multi-phase PSK signal
5394338574Carrier recovering circuit for phase modulated signal
5404336500MSK Demodulator frequency acquistion apparatus and method
5414330863Demodulator arrangement
5424328587Phase slip detector and systems employing the detector
5434328576Wide band demodulator of phase modulated signals
5444327439Method for generating modem transmission signals with quadrature amplitude modulation
5454324001Synchronizer for MSK burst communications
5464320499System for multi-level data transmission by means of an angle-modulated carrier having a constant amplitude
5474317206On line quality monitoring
5484314206Noise chopper for preventing false locks in a coherent carrier recovery system
5494313219Receiver for high frequency electromagnetic oscillations having a frequency readjustment
5504313205Carrier synchronization and symbol synchronization for offset-QPSK burst communications
5514310803Bandpass filter circuit

1981

5524308503Phase shift keyed demodulator using recovered carrier with controlled phase offset
5534302844Carrier transmission through harmonic polluted medium
5544302842Digital radio repeater with regenerator
5554301417Quadriphase differential demodulator
5564298986Receiver for phase-shift modulated carrier signals
5574297650Phase locked loop carrier recovery circuit with false lock prevention
5584281412Method of and apparatus for transmitting and recovering offset QPSK modulated data
5594267591QPSK Suppressed carrier with rotating reference phase
5604263670Microprocessor data modem
5614255713Carrier regeneration circuit for polyphase modulation system
5624246653In-phase quadrature demodulator for CPSK signals
5634244047Multiplexed carrier transmission through harmonic polluted medium
5644243941Digital signal receiver having a dual bandwidth tracking loop

1980

5654241454Hard limiting acquisition technique for PSK carrier detector
5664238739Preset network for a phase lock loop
5674236249Circuit arrangement for correcting frequency errors during a transmission of data
5684236248Transmission speed switching system
5694234957Method and apparatus for generating timing phase error signals in PSK demodulators
5704233565Method and apparatus for a PSK signal detector
5714231094Method and device for determining the phase intercept in a system employing phase-shift keying modulation
5724224575Phase/frequency controlled phase shift keyed signal carrier reconstruction circuit
5734217551Phase modulated data transmission system
5744215239Apparatus for the acquisition of a carrier frequency and symbol timing lock
5754213094Poly-phase modulation systems
5764186348Receiver for data transmitted by means of the interleaved binary phase shift keyed modulation technique
5774185246Circuit for reducing transients by precharging capacitors
5784184045System and method for transmission of information
5794181967Digital apparatus approximating multiplication of analog signal by sine wave signal and method

1979

5804180705Arrangement for the automatic resynchronization of a data transmission receiver
5814174489Phase discriminator in a receiver for a data transmission system
5824169246Digital carrier correction circuit
5834158174Circuit arrangement for the production of a control signal in a receiving channel which is subject to interference
5844149121Four phase to two phase correlator
5854143322Carrier wave recovery system apparatus using synchronous detection
5864137505Method of and apparatus for frequency control
5874135057High density digital transmission system

1978

5884130802Unidirectional phase shift keyed communication system
5894121166Phase synchronizing circuit for demodulation of multi-phase PSK signals
5904110706Phase synchronizing circuit
5914109102Phase synchronizing circuit
5924109100Reverberation compensating communication system
5934106102Self-adaptive digital filter for noise and phase jitter reduction
5944105975Offset correction circuit for phase detectors
5954100499Carrier synchronization system for coherent phase demodulators
5964097813Carrier wave recovery circuit
5974096442Crosstalk corrector and decision device for FSK
5984095187Demodulation system for a multi-level multi-phase superposition-modulated carrier wave
5994092606Quadraphase demodulation
6004092491Differential encoding and decoding scheme for digital transmission systems
6014091331Arrangement for compensating carrier phase errors in a receiver for discrete data values
6024087677Digital PSK modem
6034087628Carrier lock detector
6044085378QPSK demodulator
6054084128Demodulator for phase reversal modulation system
6064079329Signal demodulator including data normalization
6074070638Nonlinear surface acoustic wave PSK encoder/correlator

1977

6084042884Phase demodulator with offset frequency reference oscillator
6094041391Pseudo noise code and data transmission method and apparatus
6104039961Demodulator for combined digital amplitude and phase keyed modulation signals
6114032847Distortion adapter receiver having intersymbol interference correction
6124028490MSK digital data synchronization detector
6134027265Unbalanced quadriphase demodulator
6144021743Phase logic demodulator
6154020283MSK digital data synchronization detector
6164019184Direction-finding method and system
6174011407Narrow-band eight-phase modem
6184006416Digital communication system
6194001775Automatic bit synchronization method and apparatus for a logging-while-drilling receiver

1976

6204000476Phase locked loop with circuit for preventing sidelock
6213997848Linear phase demodulator including a phase locked loop with auxiliary feedback loop
6223993956Digital detection system for differential phase shift keyed signals
6233993868Minimum shift keying communication system
6243992617Chopping correlator for a MSK data signal
6253991611Digital telemetering system for subsurface instrumentation
6263984777Carrier wave reproducer device for use in the reception of a multi-phase phase-modulated wave
6273984634Anti-multipath digital signal detector
6283983501Hybrid tracking loop for detecting phase shift keyed signals
6293983499Multi-phase PSK demodulator
6303983495Digital waveform generator
6313980945Digital communications system with immunity to frequency selective fading
6323978406Code error detecting system in digital code transmission
6333973212Phase detection in phase lock loop circuit
6343973211Combiner-demodulator for phase shift keyed suppressed carrier signals received over two transmission paths
6353971999Coherent phase demodulator for phase shift keyed suppressed carrier signals
6363970945Method and apparatus for demodulating PSK modulated oscillations
6373947633Circuit arrangement for demodulating a frequency-differential, phase-modulated signal
6383932705PSK telemetering synchronization and demodulation apparatus including an ambiguity eliminating device
6393931472Asynchronous quadriphase communications system and method
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017