СПИСОК патентов США - подгруппа МПК16 H04B1/62


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№ п/п Номер патента Название патента

2017

19595983Method and apparatus for digital predistortion of ultra wideband radio frequency upconverters
29584181Channel estimation
39577863System and method for improved frequency/phase error tracking in high-speed high-frequency communication
49571137Single tone RF signal generator
59537585Circuit, an integrated circuit, a transmitter, a receiver, a transceiver, a method for obtaining calibration data and a method for generating a local oscillator signal

2016

69529567Digital processor having instruction set with complex exponential non-linear function
79521405Receiver automatic gain control (AGC) and slicer
89520915Radio communication system, radio base station, and mobile terminal
99509365Digital suppression of transmitter intermodulation in receiver
109489961Controlling a noise-shaping feedback loop in a digital audio signal encoder avoiding instability risk of the feedback
119485035Self-tuning transfer function for adaptive filtering
129461698Communications device with simultaneous transmit and receive and related methods
139455761Systems and methods for multi-rate digital self-interference cancellation
149455760Waveform adaptable digital predistortion
159450622Circuit and method for providing a radio frequency signal
169450621Digital predistortion processing method and system
179432076Linearity enhancement for concurrent transmission systems and methods
189419658Digital modulator non-linearity correction
199385762Linearization of intermodulation bands for concurrent dual-band power amplifiers
209379854Signaling with noise cancellation using echoes
219379745Multi-band wide band power amplifier digital predistortion system
229372663Direct digital synthesis of signals using maximum likelihood bit-stream encoding
239363130Dynamic digital predistortion for a microwave radio system
249363068Vector processor having instruction set with sliding window non-linear convolutional function
259362967Transmitter noise suppression in receiver
269362942System characteristic identification systems and methods
279362868Reduced power amplifier load impact for open loop envelope tracking
289337886Digital pre-distortion with shared observation path receiver
299331738Method, system, and apparatus for RF switching amplifier
309306678Data interpretation with noise signal analysis
319292255Multi-stage crest factor reduction (CFR) for multi-channel multi-standard radio
329280315Vector processor having instruction set with vector convolution function for fir filtering
339240819Self-tuning transfer function for adaptive filtering
349236898Multi-band observation receiver
359231647Joint analog and digital interference cancellation in wireless systems

2015

369225501Non-linear modeling of a physical system using look-up table with polynomial interpolation
379225364Distortion compensation method, distortion compensation apparatus, and non-transitory computer readable storage medium
389209841Adaptively controlled digital pre-distortion in an RF power amplifier using an integrated signal analyzer with enhanced analog-to-digital conversion
399201628Maximum likelihood bit-stream generation and detection using M-algorithm and infinite impulse response filtering
409197281Method for power amplification and electronic device thereof
419197182Envelope power supply calibration of a multi-mode radio frequency power amplifier
429191041Digital predistortion of wideband power amplifiers with reduced observation bandwidth
439184784Method and apparatus for digital predistortion for a switched mode power amplifier
449130660Multiple-path noise cancellation
459130628Digital pre-distorter
469118525Receiver for sideband mitigation communication systems and methods for increasing communication speeds, spectral efficiency and enabling other benefits
479100250Pre-phase error correction
489094106Precoding method and apparatus
499093960Transmitter and method with RF power amplifier having predistorted bias
509088344Frequency agile filter using a digital filter and bandstop filtering
519077440Digital suppression of transmitter intermodulation in receiver
529036732Modeling transmitter and/or transmit observation receiver frequency response and utilization thereof
539020021Precoding loss reduction

2014

548891672Method and apparatus for maximizing power output based on linearity of a transmitter
558665935Method and system for calibrating a transmitting system

2013

568346188Nonlinearity calibration scheme for a frequency modulation transmitter

2010

577778612Polar modulation circuit, integrated circuit and radio apparatus

2005

586959174Amplifying device
596940987Techniques for improving audio clarity and intelligibility at reduced bit rates over a digital network
606864745Distortion compensation device
616850556Pre-phase error correction transmitter

2004

626831941CDMA system which uses pre-rotation before transmission
636807278Audio noise reduction system implemented through digital signal processing
646799021Method and arrangement for forming an address
656751447Adaptive digital pre-distortion circuit using output reference signal and method of operation
666751273Apparatus for compensating a channel distortion in a bluetooth system
676721700Audio coding method and apparatus
686714093Dynamics compressor for an analog signal to be compressed
696690711User equipment which uses pre-rotation before transmission
706680978Method and apparatus for nonlinear filtering and controlling the peak-to-average ratio

2003

716633602User equipment which uses pre-rotation before transmission
726606345Base station which uses pre-rotation before transmission
736597301Apparatus and method for level-dependent companding for wireless audio noise reduction
746591090Predistortion control for power reduction
756587499Base station which uses pre-rotation before transmission
766542612Companding amplifier with sidechannel gain control
776518852Information signal compressor and expander

2002

786430169Spectral shaping a CDMA signal
796405147Signal transfer device measurement system and method
806393062Methods and circuits for generating a preemphasis waveform
816366627Compressive receiver with frequency expansion
826346853Predistortion linearizer circuit

2001

836266320Amplitude limitation in CDMA system
846246865Device and method for controlling distortion characteristic of predistorter
856169808Signal compressing circuit

2000

866137934Optical cable with tubular metal core and method of making same
876038430Method and apparatus for improving transmission of data in a wireless network
886038429Citizen's band radio with improved reception

1999

895911115Data transmission over amps networks
905910995DSP decoder for decoding analog SR encoded audio signals
915910965Adaptive predistortion using over-the-hop feedback
925907623Audio noise reduction system implemented through digital signal processing
935907584System and method for transmitting and receiving a Lincompex signal having information encoded thereon through angle modulation
945901348Apparatus for enhancing sensitivity in compressive receivers and method for the same

1998

955845216Optimized companding for communication over cellular systems
965794187Method and apparatus for improving effective signal to noise ratios in hearing aids and other communication systems used in noisy environments without loss of spectral information
975793797Data transmisson system with a low peak-to-average power ratio based on distorting small amplitude signals
985748678Radio communications apparatus
995745839Satellite multiple access system with distortion cancellation and compression compensation
1005737434Multi-band audio compressor with look-ahead clipper
1015720039Satellite multiple access system with distortion cancellation and compression compensation

1997

1025682432Broadcast receiver
1035659660Method of transmitting and/or storing digitized, data-reduced audio signals
1045651028Data transmission system with a low peak-to-average power ratio based on distorting frequently occuring signals
1055631648Signal compression or expansion circuit for mobile communication
1065612991Use of RSSI indication for improved data transmission over amps network

1996

1075574990Predistortion technique for communications systems
1085568087Pre-distorting linearization circuit
1095533048Apparatus and method for compensating for limiter induced non-linear distortion in a wireless data communication system
1105524148Background noise compensation in a telephone network
1115507033Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
1125499389Method of compensating the dependence of the useful transmitter signal on the transfer function of a combiner filter
1135495468System and method for transmitting plural information waveforms over a single communications channel using lincompex techniques
1145493699Low noise communication analog compressor and analog expander
1155485515Background noise compensation in a telephone network

1995

1165454010System and method for calibration of frequency hopping
1175428593Digital audio signal transforming method and apparatus
1185400371System and method for filtering random noise using data compression
1195386590Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping

1994

1205363056Circuit for linearization of amplified electronic signals
1215276764Method and device for compressing and expanding an analog signal
1225276403Nonlinear preemphasis-deemphasis system

1993

1235252930Predistorter for linearization of electronic and optical signals
1245251328Predistortion technique for communications systems
1255241689Digital signal processor audio compression in an RF base station system
1265241282Wide dynamic range, low power, analog-to-digital receiver
1275204880Differential line driver employing predistortion
1285179361Compandor system with stable and widely adjustable unity gain level

1992

1295161044Optical transmitters linearized by means of parametric feedback
1305132639Predistorter for linearization of electronic and optical signals
1315113414Predistortion arrangement for a digital transmission system
1325107520Adaptive predistortion circuit for a digital transmission system
1335105446Digital method of correcting non-linearity in a transmission chain, and apparatus implementing the method
1345105445Predistortion arrangement for a digital transmission system

1991

1355065451System and method of frequency calibration in a linked compression-expansion (lincompex) system
1365060310Apparatus and method for reduction of intermodulation distortion in an optical fiber network
1375058202System and method of transmitting and receiving a licompex modulated signal over a communication channel utilizing frequency modulation techniques
1385038113Nonlinearity generator using FET source-to-drain conductive path
1395023890Digital peak noise reduction circuit
1404992754Predistorter for linearization of electronic and optical signals

1990

1414969162Polled data network auto-equalizer system and method
1424944024Method and apparatus for reducing noise in a linked compressor-expander telecommunications system
1434907217System and method of transmitting a complex waveform over a communication channel utilizing lincompex techniques
1444894862Signal compression circuit, particularly for a telephone set

1989

1454882762Multi-band programmable compression system
1464876741Method of receiving a compressed composite signal
1474856026Data transmission system comprising smearing filters
1484803739SSB communication system

1988

1494741039System for maximum efficient transfer of modulated energy
1504718116Method and apparatus for receiving a compressed composite signal

1987

1514700362A-D encoder and D-A decoder system
1524700361Spectral emphasis and de-emphasis
1534700151Modulation system capable of improving a transmission system
1544698597Suppressed-fundamental frequency three-way predistorter
1554682343Processing circuit with asymmetry corrector and convolutional encoder for digital data
1564677645Audio signal transmission system having noise reduction means
1574672633Data transmission system
1584660216Transmission system for the transmission of data signals in a modulation band
1594654891Optical communication of video information with distortion correction
1604642583Noise reduction in companding arrangements

1986

1614618941Apparatus and method for generating filtered multilevel data from NRZ data
1624600902Compandor noise reduction circuit
1634578818System for processing audio frequency information for frequency modulation
1644573208Compressed single side band communications system and method

1985

1654562571Speech processing device for radioelectric equipment adapted for speech transmission and reception
1664561111Method of predistorting a single sideband system
1674551853Apparatus for processing speech in radioelectric transmitter/receiver equipment suitable for transmitting and receiving speech
1684547741Noise reduction circuit with a main signal path and auxiliary signal path having a high pass filter characteristic
1694539707Compressed single side band communications system and method
1704536846Distortion reducer for companded analog systems
1714531208Apparatus and method for reducing telephone channel power loading
1724500842Adaptive gain variable bit rate NIC processor

1984

1734485483FM Stereophonic system incorporating companding of difference signal
1744476539Transversal type smear-desmear filter
1754457020Signal processing device for use on radio links
1764451746Non-linear emphasis circuit
1774443890Optical-connection direct-light modulation information transmission system with a passband extended towards the low frequencies and continuous waves
1784430754Noise reducing apparatus

1983

1794369509Gain control circuit for noise reduction system

1982

1804335470Audio de-emphasis circuit
1814326293Transmitter-receiver with automatic alternation control
1824314372Methods and means for producing and reproducing transmitted or recorded sound or video signals
1834313194Transmission system of frequency division multiplex signals on digital links
1844309676Instantaneous compressor and instantaneous expandor

1981

1854306256Preemphasis and clipping apparatus for reducing distortions
1864295223Digital signal/noise ratio amplifier apparatus for a communication system
1874281295Noise reducing apparatus
1884271499Method and apparatus for digitally implementing a linked compressor-expander telecommunications system
1894253072Compandor with sampling and equalization
1904250470Syllabic compander with logarithmic chain

1980

1914221934Compandor for group of FDM signals
1924215431Wireless transmission system
1934181970Digital attenuator for compressed PCM signals

1979

1944162462Noise reduction system
1954152582Compaction/expansion logic
1964151469Apparatus equipped with a transmitting and receiving station for generating, converting and transmitting signals
1974145664Audio signal compression and expansion system
1984136314Adaptive signal weighting system

1978

1994123711Synchronized compressor and expander voice processing system for radio telephone
2004122399Distortion generator
2014121295Integer weighted impulse equivalent coded signal processing apparatus
2024114115Compandor apparatus
2034112254Signal compander system
2044110699Adaptive audio compressor
2054103239Compressor for both speech and carrier signals
2064101849Adaptive filter
2074072914Compression and expansion system with enlarged dynamic range
2084071695Speech signal amplitude equalizer
2094068139IC compatible variable shunt impedance for Dolby B system

1977

2104060764Transceiver audio system
2114039949Pulse code modulation with dynamic range limiting
2124038652Digital communications line terminal compacter/expander
2134035739Signal dynamic compression and expansion circuits
2144016497Feedbackward distortion compensating circuit
2154001732Calibration oscillators for noise reduction systems

1976

2163978409Signal compressors and expanders
2173972010Compressors, expanders and noise reduction systems
2183969680Automatic dynamic compander system
2193967219Signal compressors and expanders
2203943466Compander for TDM telecommunication system
2213934190Signal compressors and expanders
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017