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)
11/1997
11/12/1997EP0806850A2 Method for transmission of COFDM-modulated broadcast signals through a satellite system
11/12/1997EP0806101A1 Method and apparatus for testing a digital communication channel at variable or fixed data rates
11/12/1997EP0806091A1 Transmission system for a non linear transmission medium
11/12/1997EP0806089A1 A method and circuit for creating a modulated signal in a transceiver
11/12/1997EP0806079A1 Transmission and reception of cpm spread-spectrum communications
11/12/1997CN1164943A Code acquisition in cdma communication system using multiple walsh channel
11/11/1997US5687198 Channel estimation in a communication system
11/11/1997US5687194 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
11/11/1997US5687165 Transmission system and receiver for orthogonal frequency-division multiplexing signals, having a frequency-synchronization circuit
11/11/1997US5687164 Decoder employing viterbi decoding method for decoding coded multi-valued signal
11/11/1997US5687163 Method and apparatus for signal classification using I/Q quadrant histogram
11/06/1997WO1997041672A1 Symbol synchronisation in a multicarrier receiver
11/06/1997WO1997041671A2 Process for the digital stepped phase modulation
11/06/1997WO1997041670A1 Method and apparatus for data transmission using multiple transmit antennas
11/06/1997WO1997041647A1 System for radio transmission of digital signals between a plurality of subscriber stations and a base station
11/06/1997WO1997041637A1 Method for the amplification of amplitude-modulated phase-keyed signals and device for realising the same
11/05/1997EP0805573A2 Method for measuring modulation parameters of digital quadrature-modulated signal
11/05/1997EP0805561A2 A method for implementing a direct conversion receiver with a six-port junction
11/05/1997EP0805560A2 Digital PLL circuit and initial setting method
11/05/1997EP0804847A1 RECEIVER FOR M-ary FSK SIGNALS
11/05/1997EP0804833A1 Frequency synchronized bidirectional radio system
11/04/1997US5684842 Digital transmission system comprising a receiver which includes a carrier recovery circuit
11/04/1997US5684837 Adjustable digital FSK demodulator
11/04/1997US5684835 Locally coherent QPSK detection with differential decoding for a fading channel
11/04/1997US5684834 Simultaneous analog and digital communication using fractional rate encoding
11/04/1997US5684832 Maximum likelihood differential detecting method and differential detector thereof
11/04/1997US5684830 Noise removing device and data communication apparatus using the same
11/04/1997US5684805 Microwave multiphase detector
11/04/1997US5683432 Adaptive, performance-optimizing communication system for communicating with an implanted medical device
11/04/1997CA2097692C Method and apparatus for cancelling spread-spectrum noise
11/04/1997CA2087845C Apparatus and method for generating a transition between the on and off states of a radio frequency transmitter
10/1997
10/30/1997WO1997040609A1 Mitigation of radio frequency interference in multi-carrier transmission systems
10/30/1997WO1997040608A1 Digital radio frequency interference canceller
10/30/1997WO1997040596A1 Modulation method and apparatus for digital communications
10/30/1997WO1997040589A1 Method and apparatus for interference decorrelation in time and space
10/30/1997WO1997040588A1 Method and apparatus for interference rejection with different beams, polarizations, and phase references
10/30/1997WO1997040587A1 Radio frequency noise canceller
10/30/1997WO1997040585A1 High-frequency signal receiver
10/30/1997WO1997040584A1 Hybrid analog/digital method and apparatus for controlling the transmission power level of a radio transceiver
10/30/1997WO1997033414A3 Pulse shaping for GMSK
10/30/1997WO1997032391A3 Receiver with digital processing of a phase-splitted input signal
10/30/1997DE19713441A1 Digital quadrature modulation signal parameter measuring apparatus
10/30/1997DE19705752A1 Broadcasting signal receiving apparatus and pulse counting demodulators
10/30/1997DE19635533A1 Punkt-zu-Mehrpunkt Fünkübertragungssystem Point-to-multipoint Fünkübertragungssystem
10/30/1997CA2252101A1 Method and apparatus for interference decorrelation in time and space
10/30/1997CA2251946A1 Digital radio frequency interference canceller
10/30/1997CA2251843A1 Method and apparatus for interference rejection with different beams, polarizations, and phase references
10/29/1997EP0804000A2 RDS signal detection device
10/29/1997EP0803999A2 Demodulator device for data carried by subcarriers
10/29/1997EP0803991A1 Method for optimising radio communication between a base station and a mobile
10/29/1997EP0803147A1 Transmitter comprising carrier suppression and dc offset reduction means
10/29/1997CN1163527A High frequency radio signal receiving device for digit communication
10/29/1997CN1163525A Demodulating method and device for phase-shift key controlled signal
10/29/1997CN1163518A Transmitting and receiving for radio signal
10/28/1997US5682419 Method and apparatus for providing infrastructure call support
10/28/1997US5682376 Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor
10/28/1997US5682157 Frequency-alternating synchronized infrared
10/23/1997WO1997039557A1 Pilot-symbol-assisted radiotelephone communications
10/23/1997WO1997039536A1 Equalizer with extended channel estimation for a receiver in a digital transmission system
10/23/1997WO1997031466A3 Fsk receiver
10/23/1997WO1997031465A3 Frequency control in an fsk receiver
10/23/1997DE19650093C1 Battery operated receiver with low standby current
10/23/1997CA2248637A1 Pilot-symbol-assisted radiotelephone communications
10/22/1997EP0802657A2 Receiver for mobile communications systems with equalisation and differential detection
10/22/1997EP0802649A1 Method and windowing unit to reduce leakage, Fourier transformer and DMT modem wherein the unit is used
10/22/1997EP0802644A2 Variable-bandwith frequency division multiplex communication system
10/22/1997EP0801868A1 Method for the adaptive assignment of the transmission capacity of a transmission channel
10/22/1997EP0801866A1 Phase detector in a carrier recovery network for a vestigial sideband signal
10/22/1997EP0801848A2 Frequency synthesizer
10/22/1997CN1163034A AGC circuit for a digital receiven
10/22/1997CN1162880A Dual mode modulating device and method
10/22/1997CN1162878A Radio receiver
10/22/1997CN1162877A Radio receiver
10/21/1997US5680633 Modular, portable data processing terminal for use in a radio frequency communication network
10/21/1997US5680462 Information encoder/decoder using chaotic systems
10/21/1997US5680417 For imposing data upon a radio frequency carrier signal
10/21/1997US5680414 Synchronization apparatus and method for spread spectrum receiver
10/21/1997US5679943 Hand-held terminal with display screens, interactive screens, magnetic credit card readers, scanners, printers and handlers
10/16/1997WO1997038506A1 Method and apparatus for conditioning digitally modulated signals using channel symbol adjustment
10/16/1997WO1997038505A1 Method and apparatus for conditioning modulated signals using window expansion
10/16/1997WO1997038503A1 Method and apparatus for conditioning modulated signals for digital communications
10/16/1997WO1997038490A1 Interrupt modulation method and appratus
10/16/1997WO1997027695A3 Digital receiver with fractionally-spaced self-recovery adaptive equalizer
10/15/1997EP0801495A2 Data transmission apparatus
10/15/1997EP0801486A2 Carrier recovery in a multicarrier receiver
10/15/1997EP0801485A2 Phase shift keying signal demodulation method and device
10/15/1997EP0800737A1 Multiple access digital transmitter and receiver
10/15/1997EP0800731A1 Clock signal recovery system for communication systems using pulse amplitude modulation/quadrature amplitude modulation
10/15/1997EP0800730A1 Method for the dynamic reconfiguration of a time-interleaved signal, and corresponding receiver and signal
10/15/1997EP0398910B1 High resolution phase to sine amplitude conversion
10/15/1997CN1162380A Method for demodulating digitally modulated data signals
10/15/1997CN1162373A Quadrature modulator with integrated distributed RC filters
10/15/1997CN1162238A Lattice image-removing device of convolutional decoder of voice lattice code in multi-channel receiver
10/15/1997CN1162230A Frequency error measuring device and radio equipment
10/15/1997CN1162229A Difference detection receiver
10/15/1997CN1162225A Method for quadrature frequency-division multi-channel sharing, synchronous method, modulator and demodulator
10/15/1997CN1162222A Local signal generator
10/15/1997CN1162221A Direct-changing receiver with wave filter with cut-off frequency switchover device
10/14/1997US5678229 Battery-powered accessory for radio data communication of a data processing apparatus
10/14/1997US5678222 Modulation and frequency conversion by time sharing
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