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)
06/1999
06/01/1999US5909466 Adaptive equalizer for digital communications systems
06/01/1999US5909463 Single-chip software configurable transceiver for asymmetric communication system
06/01/1999US5909462 System and method for improved spread spectrum signal detection
06/01/1999US5909454 Intermediate rate applications of punctured convolutional codes for 8PSK trellis modulation over satellite channels
06/01/1999US5909435 Wideband code-division multiple access system and method
06/01/1999US5909148 For recovering a carrier from an input signal
06/01/1999US5908476 Photopolymerization
06/01/1999CA2166599C Method of transmitting orthogonal frequency division multiplexing signal and receiver thereof
06/01/1999CA2165815C Digital radio communication device
05/1999
05/27/1999WO1999026386A1 Synchronization acquiring circuit
05/27/1999WO1999026385A1 Methods and apparatus for optimizing shell mapping techniques using an approximated power cost function
05/27/1999WO1999026365A1 Improvement in, or relating to, subscriber line transmission systems
05/27/1999WO1999026361A1 Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation
05/27/1999WO1999026338A1 Method and apparatus for estimating a frequency offset
05/27/1999WO1999013652A3 Method of implementing macrodiversity
05/27/1999WO1999012290A3 Method for parameter estimation and receiver
05/27/1999DE19837658A1 Transmission signal reception circuit with scanning circuit
05/27/1999CA2310220A1 Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation
05/26/1999EP0918422A2 Method for reallocating data in a discrete multi-tone communication system
05/26/1999EP0918409A2 Robust digital modulation and demodulation scheme for radio communications involving fading
05/26/1999EP0917790A1 Demodulator with digital circuit for recovering carrier and rhythm
05/26/1999EP0917778A1 Method and apparatus for receiving a signal in a digital radio frequency communication system
05/26/1999EP0671082B1 Dot product circuit for multipath receivers
05/26/1999CN1217845A Modulator and modulation method
05/26/1999CN1217842A Method and apparatus for conditioning modulated signals for digital communications
05/26/1999CN1217839A Receiver with frequency-deviation correcting function
05/25/1999US5907586 Method and device for signal decision, receiver and channel condition estimating method for a coding communication system
05/25/1999US5907585 Digital signal detecting method and detector
05/25/1999US5907583 Receiving apparatus, transmitting/receiving apparatus, and communicating method
05/25/1999US5907577 Delay compensation
05/25/1999US5907565 Cyclic trellis coded modulation
05/25/1999US5907560 Method for interleaving data frames, forward error correcting device and modulator including such a device
05/25/1999US5907558 For detecting specific data
05/25/1999US5907303 System for synthesizing signals from multiple antennas
05/25/1999US5907264 Power recycling for modulating array transmitters
05/25/1999CA2140851C Transmitting and receiving apparatus and method including punctured convolutional encoding and decoding
05/25/1999CA2126926C Modem with firmware upgrade feature
05/20/1999WO1999025104A1 Qam modulation using direct digital synthesis and upconversion
05/20/1999WO1999025103A2 Method and circuit arrangement for transmitting selected signal points of a signal constellation
05/20/1999WO1999025075A2 A wireless communication device
05/20/1999WO1999025065A1 Front end interface circuit and method of tuning the same
05/20/1999WO1998058496A3 Transmission of digital signals by orthogonal frequency division multiplexing
05/20/1999EP0919098A3 Transmission of digital signals by orthogonal frequency division multiplexing
05/19/1999EP0917326A1 Reduction of the peak to average power ration in multicarrier systems
05/19/1999EP0917325A2 Single sideband transmission of QPSK, QAM and other signals
05/19/1999EP0916216A1 Method for transmitting digital signals by correlated frequencies
05/19/1999EP0916215A1 Method for transmitting on a plurality of transmission media, with dynamic data dispatching, and corresponding transmitter and terminal
05/19/1999CN1217119A Process for digital stepped phase modulation of a modulation carrier and system thereof
05/19/1999CN1217099A Hybrid analog/digital method and apparatus for controlling transmission power level of a radio transceiver
05/18/1999US5905781 Communication server apparatus and method
05/18/1999US5905767 Timing recovery apparatus and a diversity communication apparatus using the same
05/18/1999US5905764 Radio receiver
05/18/1999US5905763 Receiving apparatus and decoder
05/18/1999US5905762 Receiver synchronization using punctured preamble
05/18/1999US5905761 Amplitude shift keyed receiver
05/18/1999US5905760 Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type
05/18/1999US5905757 Filter co-processor
05/18/1999US5905743 Apparatus, methods and computer program products for sequential maximum likelihood estimating communications signals using whitening path metrics
05/18/1999US5905413 Angular modulator with a phase variation divided and integrated
05/18/1999US5905405 Quadrature demodulation circuit with carrier control loop
05/18/1999US5905388 Frequency synthesizer
05/14/1999WO1999023822A1 High definition television vestigial sideband receiver
05/14/1999WO1999023821A1 Network for eliminating dc offset in a received hdtv signal
05/14/1999WO1999023816A1 Co-channel interference detection network for an hdtv receiver
05/14/1999WO1999023815A1 Segment sync recovery network for an hdtv receiver
05/14/1999WO1999023798A1 Time-varying trellis coded psk
05/14/1999WO1999023782A2 Communications methods and apparatus
05/14/1999WO1999023780A1 Method of and apparatus for correcting a timing error in a sampled data system
05/14/1999WO1999023779A2 Composite trellis system and method
05/14/1999WO1999023762A1 Reconfigurable radio system architecture
05/14/1999WO1999023761A1 A field programmable radio frequency communications equipment including a configurable if circuit and method therefor
05/14/1999WO1999023760A1 Receiver for a reconfigurable radio system and method therefor
05/14/1999WO1999023756A1 Method and device in a telecommunication system
05/14/1999WO1999023755A1 A linear rf power amplifier with optically activated switches
05/14/1999WO1999023754A1 Digital modulation employing single sideband with suppressed carrier
05/14/1999WO1999012318A3 Method for doubling levels of coding
05/14/1999WO1999008376A9 Static viterbi detector for channels utilizing a code having time varying constraints
05/14/1999CA2308194A1 Time-varying trellis coded psk
05/14/1999CA2308064A1 Digital modulation employing single sideband with suppressed carrier
05/14/1999CA2306846A1 Reconfigurable radio system architecture
05/14/1999CA2306842A1 Receiver for a reconfigurable radio system and method therefor
05/14/1999CA2306835A1 A field programmable radio frequency communications equipment including a configurable if circuit and method therefor
05/12/1999EP0915629A2 Communication terminal device, cellular radio communication system, and information communication method
05/12/1999EP0915597A1 Synchronisation of digital communication systems
05/12/1999EP0915582A1 Symbol coding device and method, symbol decoding device and method
05/12/1999EP0915573A2 Direct sequence spread spectrum modulated uplink for modulated backscatter systems
05/12/1999EP0915569A1 Method and apparatus for fast recovery from loss of lock in a phase locked loop
05/12/1999EP0914728A1 Arrangements and methods for generating a radio frequency signal
05/12/1999EP0914719A1 Method and apparatus for detecting communication signals having unequal error protection
05/12/1999EP0700616A4 A frequency agile radio
05/12/1999DE19748880C1 Verfahren und Schaltungsanordnung zur verbesserten Datenübertragung Method and circuit arrangement for improved data transmission
05/12/1999CN1216419A Receiver, transmitter-receiver, and communication method
05/11/1999US5903823 Radio apparatus with distortion compensating function
05/11/1999US5903614 Communication method and receiving apparatus
05/11/1999US5903611 Method of correcting nonlinearities of an amplifier, and radio transmitter employing a method of this type
05/11/1999US5903609 Transmission system using transmitter with phase modulator and frequency multiplier
05/11/1999US5903608 Adaptive bit swapping method and device for discrete multitone system
05/11/1999US5903598 Method and system for simultaneously broadcasting and receiving digital and analog signals
05/11/1999US5903596 Spread spectrum demodulation unit
05/11/1999US5903556 Code multiplexing communication system
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