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)
11/2000
11/29/2000EP1055283A2 Phase modulating transmitter
11/29/2000EP1055267A1 Downlink broadcasting by sequential transmissions from a communication station having an antenna array
11/29/2000EP0732022A4 Method and apparatus for coherent communication reception in a spread-spectrum communication system
11/29/2000EP0709007B1 Method for determining a phase error in a radio-frequency signal, and a receiver
11/29/2000CN2408617Y Intelligent station changing power carrier wave communication terminal machine
11/29/2000CN2408616Y 数传型电力载波通信控制箱 Data transmission type power line carrier communication control box
11/29/2000CN1275276A Communication device and method of peak power control
11/29/2000CN1275012A Quadrature demodulator, quadrature demodulating method and recording medium thereof
11/29/2000CN1275004A Light transmission system and transmitter and receiver thereof
11/28/2000US6154661 Transmitting on the downlink using one or more weight vectors determined to achieve a desired radiation pattern
11/28/2000US6154524 Method and apparatus for automatically and adaptively adjusting telephone audio quality and DSL data rate in a DSL system
11/28/2000US6154506 Timing recovery and tracking method and apparatus for data signals
11/28/2000US6154503 Automatic gain control system that responds to baseband signal distortion
11/28/2000US6154500 Method and apparatus in a wireless communication system for adding a second channel that overlaps a guard band used by a first channel
11/28/2000US6154490 Signal processing apparatus
11/28/2000US6154483 Coherent detection using matched filter enhanced spread spectrum demodulation
11/28/2000US6154456 Apparatus and method for digital data transmission using orthogonal codes
11/28/2000US6154158 Digital-to-analog converter D.C. offset correction comparing converter input and output signals
11/28/2000CA2050666C D.c. offset compensation in a radio receiver
11/27/2000CA2306072A1 Down converter and demodulator using a three port junction
11/23/2000WO2000070857A1 Electronic inductor with transmit signal telephone line driver
11/23/2000WO2000070802A1 Signal receiver and method of compensating frequency offset
11/23/2000WO2000070749A1 Broadcast transmission system with distributed correction
11/23/2000WO2000070571A1 System for remote data collection
11/23/2000WO2000027066A3 Dual mode qam/vsb receiver
11/23/2000WO2000019608A3 Circuit for processing data signals
11/23/2000DE19961817A1 Method and device for detecting deviations in frequency for DTMF signals contains numerous analysing devices to analyse signals received in blocks in respect of frequency components at prescribed frequencies.
11/23/2000DE19921805A1 FM and FSK demodulator with automatic frequency control AFC for receiving frequency modulated and frequency shift keying signals
11/23/2000CA2373778A1 Broadcast transmission system with distributed correction
11/22/2000EP1054541A2 Mutlicarrier receiver with soft decisions based on estimates of interference
11/22/2000EP1054540A2 Null symbol position detecting method, null symbol position detecting apparatus, and receiver
11/22/2000EP1054537A1 Hierarchical transmission digital demodulator
11/22/2000EP1053638A1 Data transmission in a television signal using quadrature amplitude modulation
11/22/2000EP1053629A2 Method for processing telephone signals delivered by an analog telephone terminal and data delivered by a data terminal
11/22/2000EP1053615A1 Multiple access method and system
11/22/2000EP1053613A2 Method and system for generating a complex pseudonoise sequence for processing a code division multiple access signal
11/22/2000CN1274495A System and method for mitigating intermittent interruptions in audio radio broadcast system
11/22/2000CN1274484A Appts. and method for modulation/demodlation with consecutive minimum runlength limitation
11/22/2000CN1274250A Telephone with modulator circuit of improved local oscillator
11/22/2000CN1274214A Transmitting/receiving device and its modulation method and estimation method
11/22/2000CN1274212A Empty signal detector
11/21/2000US6151374 Synchronizing signal detecting apparatus
11/21/2000US6151371 Automatic frequency control circuit
11/21/2000US6151370 Path-oriented decoder for signal-dependent noise
11/21/2000US6151369 Digital broadcast receiver
11/21/2000US6151368 Phase-noise compensated digital communication receiver and method therefor
11/21/2000US6151367 Digital demodulator
11/21/2000US6151366 Method and apparatus for modulating signals
11/21/2000US6151313 Baseband phase estimation technique for demodulation of overlapping packets
11/21/2000US6151296 Bit interleaving for orthogonal frequency division multiplexing in the transmission of digital signals
11/21/2000US6151295 OFDM receiving system
11/21/2000CA2148199C Convolutional interleaver with reduced memory requirements and address generator therefor
11/21/2000CA2144670C Digital device for the wideband recovery of carriers
11/16/2000WO2000069138A1 Method and apparatus to determine the speed of mobile communications apparatus
11/16/2000WO2000069137A1 Method and apparatus for adaptively classifying a multi-level signal
11/16/2000WO2000069136A1 Digital modulation signal measuring device and method capable of evaluating spectrum of noise component
11/16/2000WO2000069088A1 Spread-spectrum gmsk/m-ary radio with oscillator frequency correction
11/16/2000WO2000069085A1 Programmable digital intermediate frequency transceiver
11/16/2000WO2000069080A2 Pure delay estimation
11/16/2000WO2000069063A1 Method and apparatus for symbol estimation in a received signal
11/16/2000WO2000069023A2 Method for correcting dc offsets in a receiver
11/16/2000WO1999053665A8 Frame structure and frame synchronization for multicarrier systems
11/16/2000DE19920334A1 Verfahren und Schaltungsanordnung zur Regelung des Abtasttakts eines phasenmodulierten Signals Method and circuit for controlling the sampling clock of a phase-modulated signal
11/16/2000CA2371090A1 Programmable digital intermediate frequency transceiver
11/15/2000EP1052823A2 Linearisation of amplification for signals modulated in phase and amplitude
11/15/2000EP1052822A1 Programmable OFDM digital demodulator
11/15/2000EP1052821A2 Multicarrier receiver with detection of constellation size
11/15/2000EP1052820A1 Method and apparatus to determine the speed of mobile communications apparatus
11/15/2000EP1052819A1 Digital demodulator
11/15/2000EP1052818A1 Receiver
11/15/2000EP1052799A2 Flexible channeliser
11/15/2000EP1052782A1 Mobile telephone with a demodulation circuit having an improved local oscillator
11/15/2000EP1052781A1 Receiving apparatus and method
11/15/2000EP1052772A1 Circuit and method for producing a filtered signal
11/15/2000EP1052770A1 Modulator using AM and PM
11/15/2000EP1051818A1 Frequency synchronizing device for ofdm/cdma system
11/15/2000EP0795232A4 Universal radio architecture for low-tier personal communication system
11/15/2000CN1273730A Data carrier with at least two demodulators for receiving ASK signals of differing modulation index
11/15/2000CN1273729A Calibration device
11/15/2000CN1273728A Data transmission method and radio system
11/15/2000CN1273712A Device and method for data encoding and frequency diversity in mobile communications system
11/15/2000CN1273710A Signal-cross product automatic frequency control loop
11/15/2000CN1273707A Down/up-conversion apparatus and method
11/15/2000CN1273475A Frequency error measuring device and frequency error measuring method
11/15/2000CN1273466A Orthogonal frequency division multiplex transmitting/receiving system and block coding method thereof
11/14/2000US6148186 Method of combining received signal of diversity type radio device and diversity type radio device
11/14/2000US6148184 Radio frequency zero if direct down converter
11/14/2000US6148181 Radio apparatus adapted to remove image components from local oscillating signals
11/14/2000US6148050 Phase digitizer for radio communications
11/14/2000US6148047 DC offset compensation for zero if quadrature demodulator
11/14/2000US6148046 Blind automatic gain control system for receivers and modems
11/14/2000US6148045 Digital broadcast receiver
11/14/2000US6148040 Precoded gaussian minimum shift keying carrier tracking loop
11/14/2000US6148037 Sampling timing phase error detector for VSB modulation signal
11/14/2000US6148024 FFT-based multitone DPSK modem
11/14/2000US6148022 NRZ and biphase-L formatted quadriphase modulated GPS transmission method
11/14/2000US6148021 Noise shaping technique for spread spectrum communications
11/14/2000US6148007 Method for data transmission in a digital audio broadcasting system
11/14/2000US6147984 Method and apparatus for peak limiting in a modulator
11/14/2000US6147563 Coupled cavity oscillator producing output signals with a constant phase difference
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