СПИСОК патентов США - подгруппа МПК16 H04L27/144


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2017

19602153Radio receiving apparatus for receiving frequency-modulated radio signal

2016

29455851Efficient encoding/decoding algorithm for MTS constrained MFSK communications
39450793Device and method of sequence detection for frequency-shift keying
49407204Method for processing a frequency-modulated analog signal and corresponding device
59385816Methods and arrangements for frequency shift communications by undersampling
69270503Methods, devices and systems for receiving and decoding a signal in the presence of noise using slices and warping

2015

79225567Receiving apparatus and demodulation method
89136813Wireless network receiver

2010

97860197Spectrum-sensing algorithms and methods

2008

107330523Estimating frequency offset

2006

117058140Sliding-window multi-carrier frequency division multiplexing system
126989710Binary frequency-shift keying demodulator and frequency-to-voltage converter

2005

136968019IF FSK receiver
146907089Digital demodulation and applications thereof
156904538System and method for differential data detection
166888902Digital variable frequency oscillator

2004

176801590Method and apparatus for symbol independent discriminator correlator automatic frequency control
186785347Nonlinear-least squares based method and apparatus for FSK signal decoding
196775324Digital signal modulation system
206762642Method and apparatus for frequency shift-keying demodulation and applications thereof
216724836Detection of signals transmitted by frequency-shift keying modulation techniques
226703896Method and demodulator for FSK demodulation, and receiver including such a demodulator device
236697439Carrier acquisition in a DC/MA system

2003

246671332Zero IF receiver with reduced AM detector
256639458FM demodulator capable of providing demodulated data with high determination accuracy
266603820Demodulator having rotation means for frequency offset correction
276570946One-hot decoded phase shift prescaler
286570938Method and apparatus for recovering data symbols from a signal received by a radio communication device
296566940Method and apparatus for frequency shift-keying demodulation and applications thereof
306563887Direct conversion receiver for frequency-shift keying modulated signals
316553083Frequency control and orthogonal detection circuit and FSK receiver

2002

326498568Pipeline communication system
336493406Method and apparatus for symbol independent discriminator correlator automatic frequency control
346487260Method and apparatus for efficient correlation detection
356437693FSK receiver
366433591Frequency-voltage conversion circuit and receiving apparatus
376408035Simplified receiver for frequency shift keyed signals
386359942FSK demodulator
396351498Robust digital modulation and demodulation scheme for radio communications involving fading

2001

406332007Automatic frequency control in FSK receiver using voltage window deviation
416323727Apparatus and method for detecting digital FM
426263014Method and apparatus for correlation detection of multi-level signals with non-standard deviations
436252438Frequency-voltage conversion circuit and receiving apparatus

2000

446144253Digital FSK demodulator
456104238FM demodulator including tuning of a filter and detector
466085073Method and system for reducing the sampling rate of a signal for use in demodulating high modulation index frequency modulated signals
476072992High-frequency device
486055282Digitally sampled phase quantized FM detector for a communication receiver
496052571Tuner for PSK or PAM data applications
506047033Apparatus and method for signal timing error detection
516046628Demodulating device comprising a small circuit and a small consumption power
526038268Direct conversion FSK signal radio receiver
536020839Analog technique to detect asymmetric radio frequency pulses
546018553Multi-level mixer architecture for direct conversion of FSK signals
556011816Direct demodulation method and apparatus

1999

565994953Apparatus and method for detecting digital FM
575974094FFT receiver for MFSK
585960042Method in a selective call receiver for synchronizing to a multi-level radio signal
595960040Communication signal processors and methods
605953373Equalizing circuit and method for data communication terminal equipment

1998

615852638Method and apparatus for demodulating a symbol using symbol fragmentation, correlation and fourier analysis
625828708CID demodulator for DCT
635818296FSK demodulator using goertzel's discrete fourier transform
645796787Receiver and method thereof
655748036Non-coherent digital FSK demodulator
665729577Signal processor with improved efficiency

1997

675703908Fixed reference shift keying modulation for mobile radio telecommunications
685668749Circuit for performing arithmetic operations in a demodulator
695663989Control arrangements for digital radio receivers
705640428Direct conversion receiver
715633898Automatic frequency control apparatus for FSK receiver and FSK receiver including the same
725612976Detectors
735612617Frequency detection circuit

1996

745583785Method and apparatus for signal decoder using instantaneous magnitude and phase detection
755581579Method and apparatus to adaptively control the frequency of reception in a digital wireless communication system
765572588Method and apparatus for detecting reception of a tone signal
775557637Convolutional ambiguity multiple access (CAMA) transmission system
785550865Frequency modulator for data transceiver
795548619Radio receiver apparatus of orthogonal detection type comprising local oscillator means with improved automatic frequency control arrangement
805539355Frequency-shift-keying detector using digital circuits
815533056Data encoder/decoder for data transceiver
825530723Automatic frequency control arrangement
835521947Phase detection reset in phase locked loops used for direct VCO modulation
845519402Doppler shift compensation apparatus
855515364Radio frequency telecommunications transceiver
865513219Apparatus and method for transmitting information with a subminimally modulated transmission signal
875497121Automatically correcting data detection circuit and method for FSK modulated signals
885493583Wireless data transceiver

1995

895475705Demodulator for Manchester-coded FM signals
905471187Data signal comparation with self-adjusting threshold
915457424Quadrature demodulator operable over different IF frequencies
925453714Binary FM demodulator with self-adjusting resonant operating frequency according to demodulated binary output signal duty cycle
935451899Direct conversion FSK receiver using frequency tracking filters
945450086Self-tuning receiver/decoder for frequency shift keying RF data transmission
955450032FSK data demodulator using mixing of quadrature baseband signals
965446762Data demodulation circuit for FSK modulated RF signal receiver providing wide-band 90.degree. baseband phase shifting
975444737Wireless data transceiver
985444415Modulation and demodulation of plural channels using analog and digital components
995436931FSK receiver
1005420888System and method for split phase demodulation of frequency shift keyed signals
1015414736FSK data receiving system
1025412687Digital communications equipment using differential quaternary frequency shift keying
1035410315Group-addressable transponder arrangement
1045408695Intelligent automatic deviation compensation for wireless modems
1055402446FSK receiver having a PLL local oscillator operable in intermittent operation in accordance with its phase locked state
1065394109Digital FSK demodulator with offset cancellation

1994

1075373533FSK signal receiving device
1085365470Fast fourier transform multiplexed pipeline
1095365185Frequency controlled loop for demodulating OOK and PSK signals
1105345187Dual frequency demodulation apparatus for frequency shift keyed (FSK) data signals and FM signals and method therefor
1115309113FSK data demodulator
1125293408FSK data receiving system
1135287516Demodulation process for binary data

1993

1145245632Synchronous FSK detection
1155241566Full duplex FSK system
1165227741Variable speed asynchronous modem
1175197085Radio receiver

1992

1185157343Electronic arrangement for receiving a modulated carrier signal
1195091921Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency
1205081650Data receiver
1215079513Demodulator and radio receiver having such a demodulator

1991

1225065409FSK discriminator
1235053717FSK demodulator
1245040192Method and apparatus for optimally autocorrelating an FSK signal
1255039951Josephson junction FSK demodulator
1265015961Frequency shift demodulator
1275012492Apparatus and method for detecting a carrier signal
1284987374FSK demodulator

1990

1294893317Digital signals and frequency correction in a digital wireless system

1989

1304881240AM equalizer circuit for digital systems
1314870659FSK demodulation circuit
1324866771Signaling system
1334825448Subscriber unit for wireless digital telephone system
1344814717FSK frequency discriminator for a coherent optical transmission system

1988

1354763290Apparatus for performing a fast Fourier transform
1364752742Frequency demodulator for recovering digital signals
1374745627Procedure and circuit for detection of the information of a received signal
1384726041Digital filter switch for data receiver
1394723310Digital data transmission system by coherent light wave modulation

1987

1404716579Phase corrector
1414713563d.c. Block capacitor circuit for rejection of d.c. offset
1424696017Quadrature signal generator having digitally-controlled phase and amplitude correction
1434682117Quadrature demodulation data receiver with phase error correction
1444680778Fast acquisition circuit for synchronous digital receiver operating in wideband noise
1454672640Radio receiver
1464672632Optimized communications system and method employing channel synthesis and phase lock detection
1474656648Process for the noncoherent demodulation of a digital signal
1484651107Demodulator for digital FM signals
1494649551Decoder for a frequency-keyed signal, particularly an FSK-video text signal
1504647864Variable-delay, sine-cosine non-coherent demodulator
1514639935Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission

1986

1524628518Radio receiver
1534618967Radio receiver
1544612509Frequency shift keyed demodulator
1554605903FSK demodulator with high noise immunity digital phase detector
1564583239Digital demodulator arrangement for quadrature signals
1574580101FM demodulators with local oscillator frequency control circuits
1584571738Demodulator logic for frequency shift keyed signals
1594570125FSK Demodulator with concurrent carrier and clock synchronization
1604569061Phase distortion adaptive detector of minimum shift keying data
1614568882Digital FSK demodulator circuit

1985

1624543547Demodulation filter for a signal modulated in binary frequency manner
1634529941FSK Demodulator utilizing multiple-phase reference frequencies
1644523324Direct modulation FM data receiver
1654521892Direct conversion radio receiver for FM signals
1664517680Error vector normalizer
1674499425Phase velocity sign detector for frequency shift key demodulation

1984

1684488120Frequency shift keying demodulator using a phase locked loop and voltage comparator
1694486715Frequency shift key demodulator
1704475219Demodulator for frequency-shift-keyed binary data signals
1714462107Radio receiver for frequency shift keyed signals
1724437068FSK Demodulator for frequency-modulation modem

1983

1734388730Noise detector and data signal receiver for a frequency modulation system
1744382232Device for demodulating signals modulated by frequency-shift keying

1982

1754359692Rapid acquisition shift keyed signal demodulator
1764355407Device for disconnecting the receiver in case of a small signal-to-noise ratio for a digital-modulated radio system
1774336613Charge coupled device filters and modems incorporating such filters
1784322851Decoding logic for frequency shift keying receiver

1981

1794291275Frequency demodulation system
1804264975Receiver for frequency modulated signals having two quadrature channels
1814254503Radio receiver for tone modulated signals

1980

1824234852Coherent frequency shift key demodulator
1834229698Tuning indicator
1844193034Radio receiver for FSK signals
1854193033Quadrature transposition stage
1864188503Digital data communications system

1979

1874156229Bit identification system for borehole acoustical telemetry system
1884156194Frequency-shift-keyed receiver

1978

1894096442Crosstalk corrector and decision device for FSK
1904072905Wide acquisition range MSK demodulator input circuit

1977

1914056838In-band signal-to-noise ratio monitor for an FSK relaying system
1924054842Channel gain imbalance compensation for FSK demodulator
1934053836Device for transmission of information by pulse code frequency shift modulation
1944015206Protective relaying modem receiver
1954015082Multi-channel signal decoder

1976

1963967202Data transmission system including an RF transponder for generating a broad spectrum of intelligence bearing sidebands
1973955142Single-sideband radiotelephone system
1983947769Threshold correction system in FSK transmissions
1993936762Digital phase-lock loop systems for phase processing of signals
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017