Patents for H04L 27 - Modulated-carrier systems (89,721)
04/2002
04/18/2002WO2001093445A3 System and method for baseband removal of narrowband interference in ultra wideband signals
04/18/2002WO2001065702A3 A modulation scheme for fdd/tdd transceivers
04/18/2002WO2001058027A3 Pilot symbol assisted modulation and demodulation in wireless communication systems
04/18/2002US20020045433 Method and arrangement for reducing frequency offset in a radio receiver
04/18/2002US20020044613 I/Q demodulator device with three power detectors and two A/D converters
04/18/2002US20020044610 DSL rate adaptation
04/18/2002US20020044597 Spread spectrum bit allocation algorithm
04/18/2002US20020044539 Centroid tracking for spread-spectrum communications
04/18/2002US20020044525 Telecommunications rack including shelves with nonredundant backplanes used redundantly
04/18/2002US20020044524 OFDM communications methods and apparatus
04/18/2002US20020044073 System and method for Huffman shaping in a data communication system
04/18/2002US20020044024 SSB transmitter
04/18/2002US20020044013 Signal compensator circuit and demodulator circuit
04/18/2002DE19654966C2 Digital receiver esp. for digitally modulated signal
04/18/2002DE10133834A1 M-wertiger FSK-Modulator M-valued FSK modulator
04/18/2002DE10119441A1 Carrier frequency estimation system for quadrature amplitude modulated signal converts signal into IF signal controlling complex signal generator with evaluation of Fourier transformation of complex signal
04/18/2002DE10048464A1 Synchronizing receiver to received signal involves performing synchronization in digital receiver stage using digital algorithm; signal is demodulated using additional digital algorithm
04/18/2002DE10048434A1 Operating point regulation method for e.g. data modulator involves changing amplitude of control signal dependent on regulation signal, which is generated dependent on operating point deflection
04/17/2002EP1198100A2 Channel coding based on hidden puncturing for partial-band interference channels
04/17/2002EP1198099A2 GMSK modulator, using direct digital synthesis
04/17/2002EP1198088A1 Multi-carrier communication apparatus and multi-carrier communication method
04/17/2002EP1197064A2 Adsl system for transmission of voice and data signals
04/17/2002EP1197051A1 Modulation switch for the generation of a similtaneously phase- and amplitude modulated signal
04/17/2002EP1197050A1 Synchronisation and detection of modulation type
04/17/2002EP1197049A1 A method and apparatus for performing dc-offset compensation in a radio receiver
04/17/2002EP1197028A1 Integrated modem and line-isolation circuitry and associated method
04/17/2002EP1197003A1 Method and apparatus for data transmission
04/17/2002EP1058968A4 Quadrature-free rf receiver for directly receiving angle modulated signal
04/17/2002EP1004197B1 Method for supporting simple synchronization on the carrier of an energy dispersed qpsk signal
04/17/2002EP0951770A4 Method and apparatus for decision directed demodulation using antenna arrays and spatial processing
04/17/2002EP0944960B1 Digital continuous phase modulation for a dds-driven phase locked loop
04/17/2002EP0858695B1 Apparatus and method for digital data transmission
04/17/2002CN1345500A Timing reproduction device and demodulator
04/17/2002CN1345493A Digital broadcasting apparatus
04/17/2002CN1345482A Method and apparatus for reducing oscillator noise by noise-feedforward
04/17/2002CN1345167A Method and device for using carrier back-scattering mobile communication
04/17/2002CN1345156A Modulator-demoulator unit and control mehtod thereof
04/17/2002CN1345150A Signal multiplexer
04/17/2002CN1345140A Method and device for correcting frequency shift and medium for storing control program
04/17/2002CN1345138A Method and device for obtaining time slot timing and frequency shift correction and storage medium
04/17/2002CN1345137A Method and device for adjusting reference frequency in receiver and medium for storing control program
04/17/2002CN1345125A 自适应预失真发射机 Adaptive predistortion transmitter
04/17/2002CN1345124A Channel estimation sequence and method for estimating transmission channel using such channel estimation sequence
04/17/2002CN1083197C I/Q quadraphase modulator circuit
04/17/2002CN1083196C Digital transmission system comprising receiver which includes carrier recovery circuit
04/17/2002CN1083178C Spread spectrum communication system for error compensation of carrier frequency
04/16/2002US6374312 System for dedicating a host processor to running one of a plurality of modem programs and dedicating a DSP to running another one of the modem programs
04/16/2002US6373909 Communications terminal having a receiver and method for removing known interferers from a digitized intermediate frequency signal
04/16/2002US6373903 Apparatus and method for increasing the effective data rate in communication systems utilizing phase modulation
04/16/2002US6373902 Device and method for linearizing transmitter in digital communication system
04/16/2002US6373901 Method and apparatus for conditioning modulated signals using window expansion
04/16/2002US6373888 Estimated channel with variable number of taps
04/16/2002US6373887 HTU-C clocking from a single source
04/16/2002US6373880 Frequency modulation circuit
04/16/2002US6373861 Frequency synchronizing device for OFDM/CDMA system
04/16/2002US6373859 Methods and apparatus for encoding and decoding data
04/16/2002US6373433 Apparatus and method for generating transmitter antenna weights
04/16/2002US6373345 Modulator structure for a transmitter and a mobile station
04/16/2002CA2196480C Soft decision decoder
04/11/2002WO2002030080A1 Adaptive filtering and dc offset removal for communications systems
04/11/2002WO2002030032A2 Space-time coding with orthogonal transformations
04/11/2002WO2002030030A2 Method and system for transmission in a noisy environment
04/11/2002WO2002030023A1 Communication device and communication method
04/11/2002WO2002029985A2 A calibrated dc compensation system for a wireless communication device configured in a zero intermediate frequency architecture
04/11/2002WO2002029978A2 Method and apparatus for automatic frequency control in a cdma receiver
04/11/2002WO2002001729A3 Rate n/n systematic, recursive convolutional encoder and corresponding decoder
04/11/2002WO2001084796A3 Framing technique for adsl systems
04/11/2002WO2001065706A3 Device for linearising a high-frequency amplifier
04/11/2002WO2001058012A3 High-efficiency power modulators
04/11/2002US20020042661 Apparatus and method for detecting transmission mode in digital audio receiver using null symbols
04/11/2002US20020042255 System and method for detecting and correcting phase error between differential signals
04/11/2002US20020042254 Method of evaluating the quality of a radio link in a mobile radiocommunication system
04/11/2002US20020041643 Systems and methods for a multi-carrier transceiver with radio frequency interference reduction
04/11/2002US20020041642 Process and device for extracting digital data contained in a signal conveyed by an information transmission channel, in particular for a cellular mobile telephone
04/11/2002US20020041639 Modulation identification device
04/11/2002US20020041638 Receiving circuit
04/11/2002US20020041637 Sliding-window multi-carrier frequency division multiplexing system
04/11/2002US20020041636 Channel estimation sequence and method of estimating a transmission channel which uses such a channel estimation
04/11/2002US20020041635 Preamble design for multiple input - multiple output (MIMO), orthogonal frequency division multiplexing (OFDM) system
04/11/2002US20020041634 VSB Transmission system
04/11/2002US20020041625 Frequency diverse single carrier modulation for robust communication over in-premises wiring
04/11/2002US20020041608 Digital television system
04/11/2002US20020041208 Signal distortion compensating apparatus and method
04/11/2002DE10143007A1 System und Verfahren zum Implementieren einer schnellen Fourier-Transformation (FFT) bei Datenübertragung System and method for implementing a Fast Fourier Transform (FFT) on data transmission
04/10/2002EP1195962A2 Method for reducing the peak-to-average power ratio of a multicarrier signal
04/10/2002EP1195961A2 Frequency offset correction in multicarrier receivers
04/10/2002EP1195960A2 Demapping in a multicarrier receiver
04/10/2002EP1195937A1 Space-time coding with orthogonal transformations
04/10/2002EP1195936A1 Wireless communication device and wireless communication method
04/10/2002EP1195917A1 Method for peak to average power ratio reduction in wireless communication system
04/10/2002EP1195909A1 Method and apparatus for demodulation
04/10/2002EP1195908A2 Method and apparatus for processing modulation symbols for soft input decoders
04/10/2002EP1195898A2 Radio receiver automatic frequency control techniques
04/10/2002EP1195895A2 Radio squelch techniques
04/10/2002EP1195893A2 Radio transmitter distortion reducing techniques
04/10/2002EP1195034A1 Power control scheme for maximizing carrier signal-to-noise ratio in multicarrier transmitters
04/10/2002EP1195033A2 Equalization with dc-offset compensation
04/10/2002EP1195032A1 Method for symbol-spaced estimation and/or tracking of a fractionally-spaced fading radio channel
04/10/2002EP1195005A1 Device and method for predistorting a transmission signal to be transmitted via a nonlinear transmission path
04/10/2002EP1020024B1 Filtering arrangement and slope detector for quadrature amplitude modulated signals