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)
06/1995
06/07/1995EP0656718A2 Dual port interface for a computer-based multifunction personal communication system
06/07/1995EP0656714A2 Adaptive linearisation of a quadrature modulator
06/07/1995EP0656713A1 Phase offset estimation for PSK receiver
06/07/1995EP0656707A2 Synchronous adder for multicarrier receiver
06/07/1995EP0656706A2 Synchronisation of OFDM signals
06/07/1995EP0656705A2 Orthogonally frequency multiplexing system
06/07/1995EP0656702A1 Method and circuit for inserting data in a common wave radiotransmission
06/07/1995EP0656697A2 Method and apparatus for creating fast fading at a receiver using orthogonally polarized antennas and transmitter time diversity
06/07/1995CN2200260Y Public communication code device for channel
06/07/1995CN2200259Y Public communication decode device for channel
06/07/1995CN1028808C Signal conditioner
06/06/1995US5423085 Method and apparatus for digital automatic frequency control of TDM communications systems
06/06/1995US5423074 AM-FM transmitter power amplifier
06/06/1995US5422917 Frequency offset estimation using the phase rotation of channel estimates
06/06/1995US5422909 Method and apparatus for multi-phase component downconversion
06/06/1995US5422889 Offset correction circuit
06/06/1995US5422752 Optical transmission system
06/06/1995CA1335842C Phase/digital conversion method and arrangements for implementing the method
06/06/1995CA1335826C Angle modulator
06/01/1995WO1995014937A1 Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing
06/01/1995DE4193233C2 Einrichtung und Verfahren zur Gleichstromversatz-Korrektur für einen Empfänger Apparatus and method for DC offset correction for a receiver
05/1995
05/31/1995EP0655849A1 Apparatus and method for avoiding false convergence states of an adaptive circuit included in a digital receiver
05/31/1995EP0655843A1 Digital receiver with minimum cost index register
05/30/1995US5420889 Decoding using a linear metric and interference estimation
05/30/1995US5420888 System and method for split phase demodulation of frequency shift keyed signals
05/30/1995US5420887 Programmable digital modulator and methods of modulating digital data
05/30/1995US5420536 Linearized power amplifier
05/30/1995CA2041764C Device for determining frequency shifts
05/26/1995WO1995014334A1 A method for minimizing a phase error of a transmitter
05/25/1995CA2117935A1 All digital if-to-baseband signal converter
05/24/1995EP0654914A2 Spread spectrum communication switchable between FSK and PSK
05/24/1995EP0654910A1 Method for detecting information bits processed by concatenated block codes
05/24/1995EP0654895A2 An all digital if-to-baseband signal converter
05/24/1995EP0654191A1 Apparatus and methods employing distribution preserving tomlinson precoding in transmission of digital data signals
05/24/1995CN1102937A Cartesian multicarrier feedback
05/23/1995US5418819 Transmitting apparatus and receiving apparatus based on phase modulation method
05/23/1995US5418815 Receiver adaptively operable for multiple signal transmission systems
05/23/1995US5418813 Method and apparatus for creating a composite waveform
05/23/1995US5418798 Multidimensional trellis-coded communication system
05/23/1995US5418489 Method of recovering a frequency modulated signal
05/23/1995CA2032352C Demodulation control arrangement in satellite communications system using "scpc-dama"
05/18/1995WO1995013677A1 Method and apparatus for dual demodulation of mobile channel signals
05/18/1995WO1995013674A1 Discrete multiple tone transmission on high-speed digital subscriber lines
05/18/1995CA2175672A1 Method and apparatus for dual demodulation of mobile channel signals
05/18/1995CA2174864A1 Discrete multiple tone transmission on high-speed digital subscriber lines
05/17/1995EP0653873A1 Voice activated data rate change in simultaneous voice and data transmission
05/17/1995EP0653871A1 Side-channel communications in simultaneous voice and data transmission
05/17/1995EP0653861A1 Acquisition circuit for a sampling signal in a modem
05/17/1995EP0653859A1 Discrete multiple tone transmission on high-speed digital subscriber lines
05/17/1995EP0653858A2 OFDM Synchronization demodulation circuit
05/17/1995EP0653715A2 Digital signal processor
05/17/1995EP0653133A1 Spread spectrum communication system particularly suited for rf network communication
05/17/1995EP0653127A1 Rake receiver combining all the useful multipath components of a spread spectrum signal
05/17/1995CA2135970A1 Ofdm synchronization demodulation circuit
05/16/1995US5416804 Digital signal decoder using concatenated codes
05/16/1995US5416803 Process for digital transmission and direct conversion receiver
05/16/1995US5416802 Receiver circuit for digital and analog modulated signal
05/16/1995US5416801 Digital signal transmission system based on partitioning of a coded modulation with concatenated codings
05/16/1995US5416800 Mobile radio receiver for a radio transmission system
05/16/1995US5416797 System and method for generating signal waveforms in a CDMA cellular telephone system
05/16/1995US5416788 Error burst detection
05/16/1995US5416776 Modem backplane techniques
05/16/1995US5416767 Method of transmitting a data stream, transmitter and receiver
05/16/1995US5416628 Multilevel coherent optical system
05/16/1995CA2132644A1 Side-channel communications in simultaneous voice and data transmission
05/16/1995CA2132643A1 Voice activated data rate change in simultaneous voice and data transmission
05/16/1995CA2055387C Satellite communications system having increased power output density per unit of bandwidth
05/13/1995CA2135730A1 Ofdm synchronization demodulation circuit
05/11/1995WO1995012943A1 Method and apparatus for the transmission of variable rate digital data
05/11/1995WO1995012938A1 Variable rate signal transmission in a spread spectrum communication system using coset coding
05/11/1995WO1995012925A1 Dual-mode wireless unit with two spread-spectrum frequency bands
05/11/1995WO1995012879A1 Discriminating between stationary and non-stationary signals
05/11/1995DE4337593A1 Multi-frequency method for transmitting alphanumeric messages
05/11/1995CA2175085A1 Dual-mode wireless unit with two spread-spectrum frequency bands
05/11/1995CA2151398A1 Discriminating between stationary and non-stationary signals
05/10/1995EP0652677A2 Terrestrial television broadcast system converter
05/10/1995EP0652663A1 Frequency domain equaliser
05/10/1995EP0651926A1 Transmitting and receiving apparatus and method including punctured convolutional encoding and decoding
05/10/1995EP0400027B1 Method and apparatus for quadrature modulation
05/09/1995US5414737 Data decoding device with error rate estimation
05/09/1995US5414736 FSK data receiving system
05/09/1995US5414729 Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing
05/09/1995US5414711 Error detector circuit and method therefor
05/09/1995US5414384 Demodulator for radio data signals
05/04/1995WO1995012261A1 Wideband fft channelizer
05/04/1995WO1995012244A1 Demodulator logic unit adaptable to multiple data protocols
05/03/1995EP0651521A2 Discriminating signal noise from received signals
05/03/1995EP0651520A2 Control arrangements for digital radio receivers
05/03/1995EP0651259A1 Method and apparatus for measuring modulation acccuracy and a transmitted signal
05/03/1995EP0650646A1 Dual-pass rake receiver for a digital radio link between a fixed and a mobile radio unit
05/02/1995US5412696 Electronic circuit readily capable of controlling extent of a radio communication zone
05/02/1995US5412695 Method and device for removing frequency offset
05/02/1995US5412694 Data demodulator
05/02/1995US5412693 Wholly-digital demodulation system for QAM signalling in low capacity links
05/02/1995US5412690 Method and apparatus for receiving electromagnetic radiation within a frequency band
05/02/1995US5412687 Digital communications equipment using differential quaternary frequency shift keying
05/02/1995US5412352 Modulator having direct digital synthesis for broadband RF transmission
05/02/1995US5412351 Quadrature local oscillator network
05/02/1995CA2081694C Quadrature modulation circuit
05/02/1995CA2016630C System for interrupting a transmitter output wave
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