Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 27 - Modulated-carrier systems
Patents for H04L 27 - Modulated-carrier systems (89,721)
03/2000
03/22/2000EP0986883A1 Method and apparatus for band-adaptive demodulation
03/22/2000EP0775409A4 Nonlinear digital communications system
03/22/2000CN1248371A Method and apparatus for analyzing composite carrier signal
03/22/2000CN1248363A Transmitter and receiver
03/22/2000CN1248117A Phase modulation symbolic group demodulating frequency deviation estimation
03/22/2000CN1248112A Diversity receiver for merging vector weighted by coefficient being inversly proportional to deviation angle
03/21/2000US6041432 Apparatus and method for detecting signal points using signal point-mapping
03/21/2000US6041085 Carrier regenerating circuit, multi-level quadrature amplitude demodulator, and method of detecting frequency deviation
03/21/2000US6040738 Direct conversion receiver using single reference clock signal
03/16/2000WO2000014972A2 Afc device and method of controlling reception frequency in a dual-mode terminal
03/16/2000WO2000014937A1 Method and device for recuperating a digital signal carrier
03/16/2000WO2000014936A1 Digital equalising method, and radio communication receiver implementing said method
03/16/2000WO2000014867A1 Device for generating an amplitude-modulated signal
03/16/2000WO2000014553A1 Accumulated phase measurement using open-loop phase estimation
03/16/2000CA2341589A1 Digital equalising method, and radio communication receiver implementing said method
03/15/2000EP0986224A2 Attenuation and frequency offset estimation
03/15/2000EP0986207A2 Transmission of a subchannel, using a pilot signal
03/15/2000EP0986188A2 Code division multiple access (CDMA) modem
03/15/2000EP0986187A2 A pilot vector correlator apparatus for a CDMA modem
03/15/2000EP0986186A2 Adaptive matched filter
03/15/2000EP0985304A1 Carrier recovery in dab recievers
03/15/2000EP0895683B1 System for radio transmission of digital signals between a plurality of subscriber stations and a base station
03/15/2000EP0835561B1 Modulation method and circuit arrangement for the transmission of data signals
03/15/2000EP0672321A4 Improved device and method for precoding
03/15/2000CN1247661A Method and arrangement for signal modulation
03/15/2000CN1247660A Appts. methods and computer program products for sequential maximum likelihood estimating communications signals using whitening path meterics
03/15/2000CN1050488C Appts. for time division multiplexed processing of frequency diviion multiplexed signals
03/15/2000CN1050481C Deformed Cai circuit
03/15/2000CA2281462A1 Time error compensation arrangement and multi-carrier modem comprising the arrangement
03/15/2000CA2280995A1 Wireline modem, communication system and method of setting-up such
03/14/2000US6038696 Digital transmission system and method comprising a product code combined with a multidimensional modulation
03/14/2000US6038430 Method and apparatus for improving transmission of data in a wireless network
03/14/2000US6038275 Digital broadcasting receiver
03/14/2000US6038272 Joint timing, frequency and weight acquisition for an adaptive array
03/14/2000US6038270 Radio receiver apparatus and radio receiving method
03/14/2000US6038268 Direct conversion FSK signal radio receiver
03/14/2000US6038267 Digital demodulator, maximum-value selector, and diversity receiver
03/14/2000US6038264 Data receiving apparatus
03/14/2000US6038263 Method and apparatus for transmitting signals in a communication system
03/14/2000US6038262 Method and apparatus for compensation of electro-magnetic distortion using weighted feedback delay for amplitude coded sinusoidal waveform generation and transmission
03/14/2000US6038261 Method and device for setup of clipping noise of a multicarrier modulation
03/14/2000US6038251 Direct equalization method
03/14/2000US6038249 Spectrum spread transmission method and apparatus
03/14/2000CA2181843C Demodulator, modulation and demodulation system, and demodulation method
03/14/2000CA2131998C Error tracking loop
03/09/2000WO2000013388A1 A constrained-envelope digital-communications transmission system and method therefor
03/09/2000WO2000013387A1 Method and apparatus for scaling modem transfer capacity in a multi-channel communications system
03/09/2000WO2000013385A1 Carrier reproducing circuit
03/09/2000WO2000013384A1 Narrowband simultaneous multibit wireless transmission method
03/09/2000WO2000013382A1 Feher keying (fk) modulation and transceivers including clock shaping processors
03/09/2000WO2000013363A1 Codec mode decoding using a priori knowledge
03/09/2000WO2000013360A1 Communication device and method of peak power control
03/09/2000WO2000013338A1 Asynchronous time division multiplexed packet data transmission system
03/09/2000WO2000013337A2 Method and apparatus for reducing amplitude variations in communication signals employing inserted pilot symbol
03/09/2000WO2000013332A1 Doppler corrected spread spectrum matched filter
03/09/2000WO2000013312A1 Control of power ratios for in-phase and quadrature channels in a communications system
03/09/2000DE19940679A1 Amplitude scanning modulation circuit (ASK) for transmitter without need for additional capacitor, FET, or other components
03/09/2000DE19934660A1 Reception of data signals of identical contents but with different frequencies, involving using multi frequency heterodyne receiver
03/09/2000DE19840383A1 Telecommunications terminal and system for exchange of offers and requests using base station of network operator
03/09/2000DE19830638C1 Common-wave network monitoring method for digital audio broadcasting, continuously observing temporal parameters of transmitters synchronized by time and frequency
03/09/2000CA2341883A1 Feher keying (fk) modulation and transceivers including clock shaping processors
03/09/2000CA2341439A1 A constrained-envelope digital-communications transmission system and method therefor
03/08/2000EP0984596A1 Adpative PSK system and timing offset compensation circuit
03/08/2000EP0984595A1 Blind modulation detection
03/08/2000EP0984594A2 Demodulated data decision device and method
03/08/2000EP0984577A2 A code sequence generator apparatus for a CDMA modem
03/08/2000EP0983659A2 Clock recovery circuit and a receiver having a clock recovery circuit
03/08/2000EP0983657A2 Wireless local area network system
03/08/2000EP0983656A2 Method and apparatus for implementing a transmission connection
03/08/2000EP0983654A1 Synchronous coherent orthogonal frequency division multiplexing system
03/08/2000EP0983632A1 Sign-cross product automatic frequency control loop
03/08/2000EP0890227B1 Point-multipoint radio transmission system
03/08/2000EP0667695B1 Radio information and communication system using multicarrier spread-spectrum transmission system
03/07/2000US6035428 Apparatus for deinterleaving and output-processing decoded data in a trellis decoder
03/07/2000US6035005 Receiver with baseband I and Q demodulator
03/07/2000US6035004 Digital radio receiver
03/07/2000US6035003 Apparatus for correcting frequency offset in OFDM receiving system
03/07/2000US6035000 Mitigating radio frequency interference in multi-carrier transmission systems
03/07/2000US6034999 Burst signal transmitter capable of producing correct transmission output in initial burst signal
03/07/2000US6034997 Trellis decoding with multiple symbol noncoherent detection and interleaving to combat frequency offset
03/07/2000US6034996 System and method for concatenating reed-solomon and trellis codes
03/07/2000US6034620 Reception of a selective call radio signal by using threshold levels detected in the signal in calculating optimum threshold levels
03/07/2000US6034564 Demodulator using quasi-synchronous detection to demodulate modulated quadrature input signals
03/07/2000CA2174680C Implied interleaving, a family of systematic interleavers and deinterleavers
03/07/2000CA2166229C Demodulator control system and a receiver capable of quickly acquiring a desired carrier wave
03/02/2000WO2000011845A1 Power-efficient communication protocol
03/02/2000WO2000011844A1 Method and device for transmitting information symbols using a plurality of carriers and method and device for receiving information symbols
03/02/2000WO2000011831A2 Methods and apparatus for providing robust synchronization of radio transceivers
03/02/2000WO2000011824A1 Signal modulator and receiving control method for the signal modulator
03/02/2000WO2000011817A2 Method for transmitting information and suitable system therefor
03/02/2000WO2000011813A1 Method for forming a training sequence
03/02/2000WO2000011805A1 Method for simultaneously measuring the propagating characteristics of a plurality of radioelectric channels
03/02/2000WO2000011803A1 Data transmitter, method for automatically adjusting level, and method for controlling pull-in
03/02/2000WO1999062215A3 Digital demodulator in a multi-carrier system
03/02/2000WO1999060719A9 Combined analog/digital data transmission system
03/02/2000WO1999052216A3 Channel encoding/decoding device and method
03/02/2000WO1999046886A3 Off-line broadband network interface
03/02/2000DE19839207A1 Method of digital demodulation and synchronisation of FSK signals involves forming difference between complex values of difference phase vector and delayed complex values
03/02/2000DE19837409A1 Carrier recovery in phase shift keying (PSK) homodyne receiver which receives PSK modulated optical signals from transmitter
03/01/2000EP0982908A2 Reference subcarrier setting for multicarrier transission
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