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)
12/1998
12/16/1998EP0883945A1 Method and apparatus for encoding and decoding information in a digital communication system
12/16/1998CN1202295A Multichannel radio frequency transmission system to deliver wide band digital data into independent sectorized service areas
12/16/1998CN1202292A Method and system for transferning data between mobile and stationary group of persons
12/16/1998CN1202289A Method and system for rapidly generating and transmitting character sequence using voice frequencies
12/16/1998CN1202284A Distributed circuit switched radio communications network
12/16/1998CA2208094A1 Gmsk modulator
12/15/1998US5850438 Transmission system with improved tone detection
12/15/1998US5850437 Transmission system with improved tone detection
12/15/1998US5850421 Method and apparatus for estimating clock slew and carrier translation
12/15/1998US5850390 Method for managing radio resources which transmits user data/information field within a time/frequency parallelogram separated from the header channel by a plurality of frequencies
12/15/1998CA2153373C Signal oscillator, fm modulation circuit using the same, and fm modulation method
12/15/1998CA2152114C Method and apparatus for generating transmitting wave
12/15/1998CA2122753C Apparatus and method for communicating digital data using trellis coding with punctured convolutional codes
12/10/1998WO1998056148A1 Carrier reproducing circuit
12/10/1998WO1998056147A1 Modulation classification using rssi
12/10/1998WO1998056119A2 Non-coherent sequence estimation receiver for digital modulations
12/10/1998WO1998039886A3 Improvements in, or relating to synchronisation
12/10/1998WO1998034368A3 Method and device in a communication system
12/09/1998EP0883269A1 Multi-carrier telecommunication system with power reduction means
12/09/1998EP0883268A1 Method and device for estimating the frequency offset in a signal received by a mobile-telephone demodulator
12/09/1998EP0883242A2 Radio receiver and method of operation
12/09/1998EP0883237A1 Radio receiver and method of operation
12/09/1998EP0882377A1 Adaptive channel allocation in a frequency division multiplexed system
12/09/1998EP0882345A2 Fsk receiver
12/09/1998EP0882337A1 Voice messaging system and method making efficient use of orthogonal modulation components
12/09/1998EP0882268A2 Communication system with multicarrier telephony transport
12/09/1998CN1201310A Multi-carrier-wave transmission interleaving apparatus and method thereof
12/09/1998CN1201304A Double-frequency-band data communication equipment
12/09/1998CN1201303A Multi-modulation-frame emittor/receiver
12/08/1998US5848107 Transmission system with improved symbol processing
12/08/1998US5848106 Receiver decoder circuitry, and associated method, for decoding an encoded signal
12/08/1998US5848105 GMSK signal processors for improved communications capacity and quality
12/08/1998US5848104 Demodulator of receiver used for communications
12/08/1998US5848102 Method and apparatus for encoding/decoding QAM trellis coded data
12/08/1998US5848097 Transceiver apparatus employing wideband FFT channelizer and inverse FFT combiner for a multichannel communication network
12/08/1998US5847662 Radio card communication apparatus
12/08/1998US5847622 Quadrature phase shift keying modulating apparatus
12/08/1998US5847619 Method and system for calibrating a quadrature phase modulator
12/08/1998CA2148604C Method of recovering a frequency modulated signal
12/03/1998WO1998054875A1 Carrier recovery in dab receivers
12/03/1998WO1998042082A3 Method and arrangement for forming an address
12/03/1998WO1998039885A3 Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal
12/03/1998WO1998038807A3 Method and apparatus for analyzing a composite carrier signal
12/02/1998EP0881807A1 Transmitter
12/02/1998EP0881806A2 Frame structure with a plurality of modulation formats
12/02/1998EP0881805A2 Analogue front end with electrical isolation
12/02/1998EP0881804A1 Method and system for the determination of the symbol transmission format in a transmission system
12/02/1998EP0881798A1 Method and device for recovering synchronization on a signal transmitted to a mobile-telephone receiver
12/02/1998EP0880843A1 Data receiving method for receiving data through predetermined clear zones of a powerline
12/02/1998EP0880837A1 Improvements in or relating to ofdm systems
12/02/1998EP0544875B1 Apparatus for adjusting signal points, equalizer gains and the like
12/02/1998CN1200850A Method of receiving and searching a signal transmitting in bursts
12/02/1998CA2237091A1 Multi-carrier telecommunication system with power adaptation means
12/01/1998US5845243 Method and apparatus for wavelet based data compression having adaptive bit rate control for compression of audio information
12/01/1998US5845196 Radio communication apparatus and method
12/01/1998US5844950 Cross polarization interference canceler and cross polarization interference eliminating apparatus using the same
12/01/1998US5844948 System and method for digital tracking and compensation of frequency offset error in a satellite receiver
12/01/1998US5844944 System for transmitting data
12/01/1998US5844943 Method and converter for converting rectangular signals to phase signals
12/01/1998US5844938 Carrier based data operated squelch
12/01/1998US5844907 Synchronization determining circuit, demodulator and communication system
12/01/1998US5844449 Used in microwave frequency bands and millimeter wave bands
12/01/1998US5843139 Adaptive, performance-optimizing communication system for communicating with an implanted medical device
12/01/1998CA2106848C Frame synchronisation for qam
12/01/1998CA2106844C Tcm scheme with fractional bit rates, framing signals and constellation shaping
11/1998
11/29/1998CA2236686A1 Multi-modulation frame emitter/receiver
11/26/1998WO1998053580A1 Method and apparatus for demodulating a symbol
11/26/1998WO1998053579A1 Receiver with controllable amplifier means
11/26/1998WO1998053572A1 Improved method for partially modulating and demodulating data in a multi-carrier transmission system
11/26/1998WO1998053552A1 Single side-band modulation system for use in digitally implemented multicarrier transmission systems
11/26/1998WO1998028852A3 Continuous phase modulator, comprising a direct digital synthesizer followed by a phase locked loop
11/26/1998DE19720766A1 Digital amplitude demodulator with quadrature and coordinate converters
11/26/1998CA2289537A1 Single side-band modulation system for use in digitally implemented multicarrier transmission systems
11/26/1998CA2289529A1 Improved method for partially modulating and demodulating data in a multi-carrier transmission system
11/25/1998EP0880253A2 Blind training of a decision feedback equalizer
11/25/1998EP0880250A1 Receiving apparatus and receiving methods
11/25/1998EP0880244A2 Method for the preparation of data for digital broadcast transmission
11/25/1998EP0879523A1 Multi-carrier symbol synchronisation
11/25/1998EP0879522A1 Coherent modulation of cpm signals
11/25/1998EP0776557A4 Multi-band, multi-mode spread-spectrum communication system
11/25/1998CN1200214A Method of synchronizing a digital signal receiver
11/25/1998CN1200213A Wireless powered communication device using power signal sampling and method
11/25/1998CN1200209A A zero-IF receiver
11/25/1998CN1199968A Deformed cai's circuit
11/25/1998CN1199966A Double-wire chaotic secret communication system
11/25/1998CN1199961A Delay detection demodulation system
11/24/1998US5842137 Subscriber unit for wireless digital telephone system
11/24/1998US5841820 Data comparison AGC system for VSB receiver
11/24/1998US5841817 Apparatus and methods for signal recovery in a digital communication system
11/24/1998US5841816 Diversity Pi/4-DQPSK demodulation
11/24/1998US5841815 Data receiver for correcting a phase of a received phase-modulated signal
11/24/1998US5841814 Sampling system for radio frequency receiver
11/24/1998US5841813 Digital communications system using complementary codes and amplitude modulation
11/24/1998US5841806 Method and apparatus for the transmission of energy-scaled variable rate data
11/24/1998US5841776 Apparatus and method for a high throughput fiber-optic access network using code division multiple access
11/24/1998US5841481 Method of accessing rows in a memory array
11/24/1998US5841169 Integrated circuit containing devices dielectrically isolated and junction isolated from a substrate
11/24/1998CA2128588C Digital am transmitter
11/24/1998CA2120714C Method and apparatus of estimating channel quality in a receiver
11/24/1998CA2102407C Method and apparatus for modifying a decision-directed clock recovery system
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