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)
04/1995
04/29/1995CA2134531A1 Control arrangements for digital radio receivers
04/27/1995WO1995011558A1 Modulation and coding for transmission using fluorescent tubes
04/26/1995EP0650286A2 Ringdown and ringback signalling for a computer-based multifunction personal communications system
04/26/1995EP0650281A1 Adaptive precoding and preemphasis for trellis coded modulation systems
04/26/1995EP0650277A1 Method and apparatus for correcting a digital signal in a receiver using a set of orthogonal functions
04/26/1995CN1102043A 误差跟踪环路 Error tracking loop
04/25/1995US5410573 Digital phase-locked loop circuit
04/25/1995US5410368 Carrier acquisition by applying substitute pilot to a synchronous demodulator during a start up interval
04/25/1995US5410315 Group-addressable transponder arrangement
04/25/1995US5410279 Balanced type phase modulator for use in microwave band
04/25/1995CA2034697C Coherent demodulator for ˜/4 shifted qpsk signal
04/23/1995CA2130538A1 Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel
04/20/1995WO1995010909A1 Process for carrier and timing recovery
04/20/1995WO1995010893A1 Digital communications equipment using differential quaternary frequency shift keying
04/20/1995WO1995010879A1 Method of recovering a frequency modulated signal
04/20/1995DE4425973C1 Method for adaptively determining the transmission capacity of a transmission channel
04/20/1995DE4425713C1 Method for multi-carrier modulation and demodulation of digitally coded data
04/20/1995CA2174142A1 Digital communications equipment using differential quaternary frequency shift keying
04/19/1995EP0649257A2 Transmission system minimizing interference in digital transmission
04/19/1995EP0649237A1 AFC circuit for QPSK demodulator
04/19/1995EP0649235A1 Method and apparatus for channel equalization
04/19/1995EP0649230A1 Digital modulator with a variable bit rate and its application in FM broadcasting
04/19/1995EP0648851A1 Sulfur-containing powder-metallurgy tool steel article and its method of manufacture
04/19/1995CN1101773A Applications of simultaneous analog and digital communication
04/19/1995CN1101772A Simultaneous analog and digital communication
04/19/1995CN1101771A Controlled simultaneous analog and digital communication
04/18/1995US5408695 Intelligent automatic deviation compensation for wireless modems
04/18/1995US5408504 Symbol and frame synchronization in a TDMA system
04/18/1995US5408502 Apparatus and method for communicating digital data using trellis coded QAM with punctured convolutional codes
04/18/1995US5408499 Multilevel code for transmission device
04/18/1995CA2053890C Time domain radio transmission system
04/13/1995WO1995010151A1 Open loop phase error estimation in mobile channels
04/13/1995WO1995010144A1 Arrangement in a multi-user system
04/13/1995WO1995010136A1 A quadrature local oscillator network
04/13/1995WO1995008241A3 Apparatus for and method of speech digitizing
04/13/1995CA2173441A1 Open loop phase error estimation in mobile channels
04/12/1995EP0648037A1 Baseband phase tracking
04/12/1995EP0647376A1 Clock phase detector.
04/12/1995EP0647374A1 Cartesian multicarrier feedback
04/11/1995US5406629 Apparatus and method for digitally processing signals in a radio frequency communication system
04/11/1995US5406588 Method and apparatus for mitigating distortion effects in the determination of signal usability
04/11/1995US5406587 Error tracking loop
04/11/1995US5406584 Time shift keying digital communications system
04/11/1995US5406551 Method and apparatus for digital signal transmission using orthogonal frequency division multiplexing
04/11/1995US5406218 Phase demodulator receiving inputs from phase detector and binary phase detector
04/11/1995CA2057942C Receiver for processing signals received over diversity channels
04/06/1995WO1995009494A1 Multiple antenna home base for digital cordless telephones
04/06/1995WO1995007576A3 Digital sound broadcasting using a dedicated control channel
04/06/1995WO1994027399A3 Telecom adapter for interfacing computing devices to the analog telephone network
04/06/1995DE4333405A1 Method for re-adjusting a frequency or phase modulation shift of frequency or phase-modulated transmitted light
04/05/1995EP0647046A1 Procedure and device for phase ambiguity resolution in a trellis coded modulation system
04/05/1995EP0647043A2 Data-driven autorating for use in data communications
04/05/1995EP0647031A1 Circuit for correcting phase-shift and amplitudes
04/05/1995EP0647015A2 Modulators
04/05/1995EP0646394A1 Striding exerciser with upwardly curved tracks
04/05/1995CA2129418A1 Data-driven autorating for use in data communications
04/04/1995US5404378 Distortion compensating circuit
04/04/1995US5404242 Photoreceiver for frequency-modulated optical signals
04/04/1995US5404127 Power line communication while avoiding determinable interference harmonics
04/04/1995CA1335120C Branch metric algorithm for eight-dimensional signal constellation
03/1995
03/30/1995WO1995008874A1 Digital radio link system and radio link terminal
03/30/1995DE4410608C1 Arrangement for determining the frequency offset in a demodulator for signals with two-dimensional modulation
03/29/1995EP0645917A2 Demodulator
03/29/1995EP0645916A2 Balanced phase modulator used in microwave band
03/29/1995EP0645894A1 Transmission system using trellis or block coded modulation receiver and decoder therefor
03/29/1995EP0433458B1 System for removing circuit signal deterioration
03/29/1995CN1100860A Multiple-modulation communication system
03/29/1995CN1100859A Direct phase digitizing apparatus and method
03/29/1995CA2132789A1 Modulators
03/28/1995US5402473 Communication device and data transmitting method
03/28/1995US5402449 Process and device for converting digitally modulate high-frequency reception signals
03/28/1995US5402446 FSK receiver having a PLL local oscillator operable in intermittent operation in accordance with its phase locked state
03/28/1995US5402334 Method and apparatus for pseudoperiodic drive
03/28/1995CA2066270C Soft decision decoding with channel equalization
03/25/1995WO1993007701A1 System for determining absolute phase of differentially-encoded phase-modulated signal
03/23/1995WO1995008241A2 Apparatus for and method of speech digitizing
03/23/1995WO1995008218A1 Methods and apparatus for detecting cellular digital packet data (cdpd)
03/23/1995DE4420376A1 Modulator Modulator
03/23/1995DE4410607C1 Arrangement for determining the frequency offset in a demodulator for signals with two-dimensional modulation
03/23/1995CA2149214A1 Apparatus for and method of speech digitizing
03/22/1995EP0644678A1 Receiver for ASK-modulated microwave signals
03/22/1995EP0644677A1 Equalizer - matched filter combination
03/22/1995EP0643894A1 Qam signal encoding/decoding system
03/22/1995CN1100579A Bidirectional demodulation method and apparatus
03/21/1995US5400404 Modulation/demodulation circuit and communication system utilizing the same
03/21/1995US5400366 Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same
03/21/1995US5400365 Isk receiver
03/21/1995US5400363 Quadrature compensation for orthogonal signal channels
03/21/1995US5400322 Updating of bit allocations in a multicarrier modulation transmission system
03/21/1995US5399987 Bi-phase shift keying signal demodulation circuit for RDS receiver
03/21/1995US5399984 Digital frequency generation device
03/21/1995CA2013451C Adjacent channel interference canceller with means for minimizing intersymbol interference
03/17/1995CA2132145A1 Afc circuit for qpsk demodulator
03/16/1995WO1995007581A1 Method for the transmission of reference signals in an ofdm system
03/16/1995WO1995007576A2 Digital sound broadcasting using a dedicated control channel
03/16/1995DE4330672A1 Method for transmitting digitised television and/or sound radio signals
03/16/1995DE4330665A1 Method for transmitting digitised television and/or sound radio signals
03/15/1995EP0643512A1 Apparatus for the detection of the loss of frame synchronisation for multidimensional modulations
03/15/1995EP0643511A1 Synchronization circuit for subcarrier signal
03/15/1995EP0643508A1 Method and apparatus for data transmission rate adjustment in a radio data link
1 ... 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 ... 898