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)
11/1998
11/24/1998CA2102406C Apparatus for and method of synchronizing a clock signal
11/24/1998CA2102194C Phase adjustment method and apparatus for use in a clock recovery circuit
11/24/1998CA2003463C Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulation signal
11/19/1998WO1998052329A1 Equalising and decoding device for a frequency-selective digital transmission channel
11/19/1998WO1998052313A1 Receiver and receiving circuit
11/19/1998WO1998052312A2 Method and apparatus for superframe bit allocation in a discrete multitone (dmt) system
11/19/1998WO1998036580A3 A synchronization system and method for digital communication systems
11/19/1998WO1998035510A3 Remote wireless unit having reduced power operating mode
11/19/1998DE19821248A1 Digital modulation signal generator for multi-channel mobile communications system
11/19/1998CA2748611A1 A subscriber unit and method for use in a wireless communication system
11/18/1998EP0878933A1 Receiving apparatus and methods
11/18/1998EP0878916A2 Dual-band data communication device
11/18/1998EP0878081A2 Digital receiver with fractionally-spaced self-recovery adaptive equalizer
11/18/1998EP0697159B1 Multiple carrier digital television signal decoder
11/18/1998CN1199527A M-ary FSK receiver
11/18/1998CN1199305A Phase correction circuit and method therefor
11/17/1998US5839055 Narrow band radio transmitting and receiving apparatus and method
11/17/1998US5838799 Digital sound broadcasting using a dedicated control channel
11/17/1998US5838797 Secure communication by encryption/decryption of vector at PSK modulation/detection stage
11/17/1998US5838739 Channel estimator circuitry, and associated method, for a digital communication system
11/17/1998US5838737 Method and apparatus for estimating PSK modulated signals
11/17/1998US5838736 Method and apparatus for generating carriers for phase demodulation having at least two phase states, and a corresponding demodulation stage
11/17/1998US5838735 Method and apparatus for compensating for a varying d.c. offset in a sampled signal
11/17/1998US5838734 Compensation for local oscillator errors in an OFDM receiver
11/17/1998US5838733 Method and apparatus for mitigating signal distortion in a communication system
11/17/1998US5838732 To process signals in multiple mobile subscriber unit wireless communication
11/17/1998US5838728 High rate reed-solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
11/17/1998US5838727 Method and apparatus for transmitting and receiving digital data over a bandpass channel
11/17/1998US5838724 Spectral and power shaping mapper for high data rate signalling
11/17/1998US5838719 Noise shaping technique for spread spectrum communications
11/17/1998US5838383 Multimedia television receiver and method of booting the same
11/17/1998US5838210 Method and apparatus for generating a modulated signal
11/17/1998US5838208 Modulation of transmission data signal in sychronous with transmission clock signal
11/17/1998CA2133236C Method and apparatus for channel equalization
11/15/1998CA2237460A1 Adaptive multiple sub-band common-mode rfi suppression
11/15/1998CA2205686A1 Adaptive multiple sub-band common-mode rfi suppression
11/12/1998WO1998051049A1 Multicarrier receiver and method for use in dab receiver
11/12/1998DE19820435A1 Signal transceiver for conductive path system with several logic values
11/11/1998EP0877526A2 Demodulating digital video broadcast signals
11/11/1998EP0877522A1 Isolating interface between a telephone line and a digital circuit
11/11/1998EP0877517A2 Output interface for a digital communication system
11/11/1998EP0877516A1 Signal Processing System
11/11/1998EP0877514A2 Matched filter
11/11/1998EP0877506A2 Timing recovery and tracking method and apparatus for data signals
11/11/1998EP0877504A1 Method for data transmission as well as transmitter and receiver
11/11/1998EP0876725A1 Multi-level, multi-frequency interference pattern analog waveform encoding of digital data for transmission
11/11/1998EP0876179A1 Adaptive, performance-optimizing communication system for communicating with an implanted medical device
11/11/1998CN2297026Y Communication apparatus for changing transmission speed rate
11/11/1998CN1198862A Information contrasting and the software adding by using
11/10/1998US5835574 Dual-tone multi-frequency signal transfer protocol
11/10/1998US5835539 For modulating binary data in the fsk system as an input signal
11/10/1998US5835538 High speed communications system for analog subscriber connections
11/10/1998US5835536 Method and apparatus for reducing peak-to-average requirements in multi-tone communication circuits
11/10/1998US5835532 For receiving a transmitted signal subject to exhibiting a carrier offset
11/10/1998US5835529 Digital communication apparatus
11/10/1998US5835480 Circuitry and method for simultaneously transmitting voice and data information
11/10/1998US5835042 Signal transmission method and signal transmission apparatus
11/10/1998US5834986 Direct 2nd derivative synthesis method for controlling sidelobe energy in an MSK modulated signal
11/10/1998US5834985 Digital continuous phase modulation for a DDS-driven phase locked loop
11/10/1998US5833584 Striding exerciser with upwardly curved tracks
11/10/1998CA2114142C Modem
11/05/1998WO1998049767A1 Maximum likelihood detection of mpsk bursts with inserted reference symbols
11/05/1998WO1998043401A3 Software implementation of modem on computer
11/05/1998DE19718635A1 Multiple stage coding method
11/04/1998EP0876031A2 Symbol synchronization in multicarrier receivers
11/04/1998EP0876025A1 Receiving apparatus and receiving methods
11/04/1998EP0876024A1 Method for data transmission with a multicarrier transmission method
11/04/1998EP0875989A2 Automatic gain control circuit
11/04/1998EP0875988A2 Interference suppression in RF signals
11/04/1998EP0875098A1 Method and circuit arrangement for processing a received signal
11/04/1998EP0875096A1 Method and circuit arrangement for reducing offset voltage of a signal
11/04/1998EP0565652B1 Peak to average power ratio reduction methodology for qam communications systems
11/04/1998CN1198281A Receiver architecture for the receiving of angle-modulated/anglekeyed carrier signals
11/04/1998CN1198273A A receiver, a demodulator and a demodulation method
11/04/1998CN1198052A Method and apparatus for synchronizing carrier frequency of orthogonal frequency division multiplexing transmission system
11/04/1998CN1198049A Rake receiver for reducing hardware consumption and improving search performance
11/03/1998US5832387 Adaptive power allocating method and apparatus for multicarrier transmission system
11/03/1998US5832373 Output power control device
11/03/1998US5832045 Method and apparatus for recovering baud timing from correlation of intersymbol interference
11/03/1998US5832044 Transmitter antenna diversity and fading-resistant modulation for wireless communication systems
11/03/1998US5832043 System and method for maintaining continuous phase during up/down conversion of near-zero hertz intermediate frequencies
11/03/1998US5832041 64 QAM signal constellation which is robust in the presence of phase noise and has decoding complexity
11/03/1998US5832040 Phase detector
11/03/1998US5832038 Method and apparatus for classifying a multi-level signal
11/03/1998US5832032 Interference reduction in telecommunications systems
11/03/1998US5832030 Communication system for transmitting data
11/03/1998US5832028 Method and apparatus for coherent serial correlation of a spread spectrum signal
11/03/1998US5832027 Spread spectrum modulating and demodulating apparatus for transmission and reception of FSK and PSK signals
11/03/1998US5832022 Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals
11/03/1998US5832001 Variable rate viterbi decorder
11/03/1998US5831488 Digital phase modulator formed with a fixed-point digital signal processor
11/03/1998CA2145622C Quadrature modulator operable in quasi-microwave band of digital communication system
11/03/1998CA2118227C Coordinated coding for digital transmission
11/03/1998CA2117922C Modem-channel bank converter
10/1998
10/29/1998WO1998048520A1 Vswr control technique for terminal products with linear modulation
10/29/1998WO1998035473A3 Remote wireless unit having reduced power operating mode
10/28/1998EP0874501A2 Peak clipping in a quadrature modulator
10/28/1998EP0874500A2 Serial transmission methof or a data block
10/28/1998EP0874499A2 Analog-to-digital converter for digital receiver
10/28/1998EP0874495A2 Modulation apparatus, for the modulation of digital signals
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