Patents for H04L 27 - Modulated-carrier systems (89,721)
03/1995
03/15/1995EP0643506A2 Digital CDMA receiver
03/15/1995EP0643492A1 Transmission system and modem using coded modulations
03/15/1995EP0643476A1 Direct conversion receiver
03/15/1995EP0642721A1 Error tracking loop
03/15/1995EP0642720A1 Data communication receiver having burst error protected data synchronization
03/15/1995EP0642719A1 Process for reducing data in the transmission and/or storage of digital signals from several interdependent channels.
03/14/1995US5398260 Method and apparatus for restoring multi level/phase modulation data
03/14/1995US5398073 Concatenated coded vestigial sideband modulation for high definition television
03/14/1995US5398008 Circuit arrangement for amplitude-modulating the drive signal of a laser
03/14/1995CA2123735A1 All digital maximum likelihood based spread spectrum receiver
03/14/1995CA2103815C Radio frequency broadcasting systems and methods using two geosynchronous satellites
03/09/1995WO1995006978A1 An improved rom filter
03/09/1995DE4425335C1 Method and arrangement for the simultaneous transmission of a plurality of data sequences
03/09/1995DE4326997C1 Method for the multi-stage coding of information
03/08/1995EP0642245A1 Digital transmission system and method
03/07/1995US5396519 Method and apparatus for adaptively providing precoding and preemphasis conditioning to signal data for transfer over a communication channel
03/07/1995US5396518 Apparatus and method for communicating digital data using trellis coding with punctured convolutional codes
03/07/1995US5396484 Diversity communication method of time-division, time-compressed multiplexing telephone signal for mobile communication system
03/07/1995US5396357 Fault tolerant optical cross-channel data link
03/07/1995US5396196 Quadrature modular with adaptive suppression of carrier leakage
03/07/1995US5396190 Circuit for compensating for nonlinear distortion in transmit power amplifier
03/07/1995US5396056 Non-contact IC card having an active attenuation circuit
03/07/1995CA2008595C Coherent psk demodulator with adaptive line enhancer
03/02/1995WO1995006377A1 Method and apparatus for operating with a hopping control channel in a communication system
03/02/1995WO1995006368A1 Information transmission system and method of operation
03/02/1995WO1995006364A1 Communication system for communicating with a plurality of selective call receivers and method therefor
03/02/1995DE4329499A1 Method and device for transmitting signals
03/02/1995CA2166304A1 Communication system for communicating with a plurality of selective call receivers and method therefor
03/01/1995EP0641110A1 Combined equaliser and demultiplexer
03/01/1995EP0641101A2 Digital communications system with symbol multiplexers
03/01/1995EP0641096A1 Method with multiple access by orthogenal frequencies, corresponding central station, remote station, system and their use
03/01/1995EP0641091A1 Apparatus using decision directed channel estimation in a digital mobile radio link
03/01/1995EP0641087A2 Concatenated Reed-Solomon code and trellis coded modulation
03/01/1995CN1099544A 通信系统 Communications systems
03/01/1995CN1099539A Apparatus for synchronous controlled detaction of clock
02/1995
02/28/1995US5394440 High speed modem systems incorporating distribution preserving Tomlinson encoding and decoding for secondary channels
02/28/1995US5394439 Bisdn compatible modem codec for digital information communication system
02/28/1995US5394392 Method for transferring information using modems
02/28/1995US5394109 Digital FSK demodulator with offset cancellation
02/25/1995CA2124711A1 Concatenated reed-solomon code and trellis coded modulation
02/23/1995WO1995005714A1 Path gain estimation in a receiver
02/23/1995WO1995005711A1 Multi-carrier transceiver
02/23/1995DE4403408C1 Method for identifying a transmission mode
02/23/1995DE4327588A1 Method for transmitting or demodulating a digital signal and a demodulator for decoding this signal
02/22/1995EP0639915A1 A technique for automatically detecting the constellation size of a quadrature amplitude modulated (QAM) signal
02/22/1995EP0639914A2 MSK phase acquisition and tracking method
02/22/1995EP0639913A1 Apparatus for resolving phase ambiguities in a DPSK radio link
02/22/1995CN1099209A Simultaneous analog and digital communication applications
02/22/1995CN1099183A Digital signal magnetic recording and reproducing apparatus
02/21/1995US5392463 Power amplifier capable of saturation and linear amplification
02/21/1995US5392403 Circuit arrangement employing a microprocessor module for data conversion in a data transmission between a personal computer and communication equipment
02/21/1995US5392348 DTMF detection having sample rate decimation and adaptive tone detection
02/21/1995US5392230 Fir filter apparatus for multiplexed processing of time division multiplexed signals
02/16/1995WO1995005042A1 Method and apparatus for frame synchronization in mobile ofdm data communication
02/15/1995EP0638994A1 Transmitter and power amplifier therefor
02/15/1995EP0638811A2 Estimator of amplitude and frequency of a noisy biased sinusoid from short bursts of samples
02/14/1995US5390215 Multi-processor demodulator for digital cellular base station employing partitioned demodulation procedure with pipelined execution
02/14/1995US5390167 Code-division multiplex communication apparatus
02/14/1995CA2047022C Direct modulation phase shift keying (dm-psk) transmission system
02/09/1995WO1995004439A1 Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
02/09/1995DE4326007A1 Method for coordinated digital transmission via a plurality of transmission paths
02/09/1995CA2167798A1 Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
02/08/1995EP0637883A2 Carrier recovery circuit for offset QPSK demodulators
02/08/1995EP0637882A1 Automatic frequency control arrangement
02/08/1995CN1098579A Method for increasing communication in a two-way communication system
02/07/1995US5388127 Digital timing recovery circuit
02/07/1995US5388124 Precoding scheme for transmitting data using optimally-shaped constellations over intersymbol-interference channels
02/07/1995US5388122 Modulation and demodulation system
02/07/1995US5388121 Modified Chirp-Z pulse detector
02/07/1995US5387883 Quadrature modulator having controlled phase shifter
02/07/1995CA2022128C Subscriber unit for wireless digital subscriber communication system
02/02/1995WO1995003660A1 Device and method for utilizing zero-padding constellation switching with frame mapping
02/02/1995WO1995003656A1 Method and apparatus for synchronization in digital transmission systems of the ofdm type
02/02/1995DE4425354A1 Digital radio link using direct sequence spread spectrum communication between fixed and mobile units
02/01/1995EP0637181A1 Radio system with frequency optimization
02/01/1995EP0637150A1 A 1200 bit per second fallback method for use in mobile radio
02/01/1995EP0636291A1 Coordinated coding for digital transmission
02/01/1995EP0341256B1 Modem and method using multidimensional coded modulation
01/1995
01/31/1995US5386590 Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping
01/31/1995US5386438 Analog front end integrated circuit for communication applications
01/31/1995US5386239 Multiple QAM digital television signal decoder
01/29/1995CA2124491A1 Msk phase acquisition and tracking method
01/27/1995CA2127766A1 1200 bit per second fallback method for use in mobile radio
01/25/1995EP0635988A1 Narrow band simulcast system having low speed data distribution
01/25/1995EP0635183A1 Code division multiple access (cdma) inbound messaging system utilizing re-use of sequences
01/25/1995CN1097912A Demodulation method for continuous phase modulation and its demodulating circuit
01/24/1995US5384809 Error control coding arrangement for digital communications system
01/24/1995US5384547 Apparatus and method for attenuating a multicarrier input signal of a linear device
01/19/1995WO1995002297A1 Systems with increased information rates using embedded sample modulation and predistortion equalization
01/19/1995WO1995002296A1 Start-stop receiver
01/19/1995WO1995002291A1 Improved device and method for precoding
01/19/1995WO1995002290A1 Ofdm teletext
01/19/1995WO1995002289A1 Multiresolution ofdm
01/19/1995WO1994026049A3 Wireless data transceiver
01/18/1995EP0634856A2 Nonlinear coding for ISI channels
01/18/1995EP0634855A1 Automatic frequency control for direct-conversion FSK receiver
01/18/1995EP0634843A2 Equalisation arrangement
01/18/1995EP0621998A4 Method and apparatus for the formatting of data for transmission.
01/18/1995EP0613595A4 Digital demodulator.
01/17/1995USRE34831 Communication system