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)
10/2002
10/30/2002CN1377545A Method and circuit for acquisition
10/30/2002CN1377541A 数据通信装置 Data communication apparatus
10/30/2002CN1377200A Mobile communication system, transmittal mode exchange method used in it thereof and record medium
10/30/2002CN1377164A Data communication apparatus and method based on orthogonal FDMA
10/30/2002CN1377163A Flexible bit selection modified by shortened lattice codes
10/30/2002CN1093707C Rake receiver for reducing hardware consumption and improving search performance
10/29/2002US6473878 Serial-concatenated turbo codes
10/29/2002US6473719 Method and apparatus for selectively controlling the quantum state probability distribution of entangled quantum objects
10/29/2002US6473506 Signaling using phase rotation techniques in a digital communications system
10/29/2002US6473471 Slope drift and offset compensation in zero-if receivers
10/29/2002US6473470 Phase-locked loop circuits for communication system
10/29/2002US6473469 Local communication system and apparatus for use therein
10/29/2002US6473467 Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system
10/29/2002US6473466 Data transmitting method and data transmitting apparatus accompanied with a plurality of transmitting of receiving antennas
10/29/2002US6473449 High-data-rate wireless local-area network
10/29/2002US6473438 Method and apparatus for coordinating multi-point to-point communications in a multi-tone data transmission system
10/29/2002US6473394 Apparatus and method for bandwidth management in a multi-point OFDM/DMT digital communications system
10/29/2002US6473393 Channel estimation for OFDM systems with transmitter diversity
10/29/2002US6473214 Methods of and apparatus for optical signal transmission
10/29/2002US6473014 Sampling device having an intrinsic filter
10/27/2002CA2383666A1 Wireless communication apparatus
10/24/2002WO2002084968A1 Method and apparatus for maximizing receiver performance utilizing mid-packet gain changes
10/24/2002WO2002084967A2 A phase tracking system
10/24/2002WO2002084966A2 Method and apparatus for a pulse decoding communication system using multiple receivers
10/24/2002WO2002084937A1 Synchronization detection apparatus
10/24/2002WO2002084935A1 Methods for determining the gains of different carriers, radio transmission units and modules for such units
10/24/2002WO2002084934A1 Predistortion of multicarrier signals in a two-way transmission system
10/24/2002WO2002084897A2 High-quality power ramping in a communications transmitter
10/24/2002WO2002084871A2 Method and apparatus for generatng pulses from analog waveforms
10/24/2002WO2002084858A1 Tunable voltage-controlled temperature-compensated crystal oscillator
10/24/2002WO2002084857A1 Tunable voltage controlled oscillator
10/24/2002WO2002084798A1 Inverted-f ferroelectric antenna
10/24/2002WO2002084781A1 Tunable multiplexer
10/24/2002WO2002084778A2 Tunable phase shifter and applications for same
10/24/2002WO2002084686A1 Band switchable filter
10/24/2002WO2002084685A1 Tunable ferro-electric filter
10/24/2002WO2002084310A1 Low-loss tunable ferro-electric device and method of characterization
10/24/2002WO2002078243A1 Packet transmission system and packet transmission method
10/24/2002WO2002026018A3 Robust signaling techniques in multicarrier systems
10/24/2002WO2001054330A9 A method and apparatus for improved cellular telephone communications
10/24/2002US20020157110 Method and apparatus for enhanced cable modem operation
10/24/2002US20020155850 Method, apparatus and system for synchronization in radio communication systems
10/24/2002US20020155822 Direct conversion receiver
10/24/2002US20020154711 Method and apparatus for a demodulator circuit
10/24/2002US20020154709 Digital VSB transmission system
10/24/2002US20020154706 Modulation of dynamical systems for communication
10/24/2002US20020154705 High efficiency high performance communications system employing multi-carrier modulation
10/24/2002US20020154704 Reduced soft output information packet selection
10/24/2002US20020154690 Receiver and adaptive equalizing method
10/24/2002US20020154688 Equalizer performance enhancements for broadband wireless applications
10/24/2002US20020154686 System and method for data transmission in DMT-based DSL modems
10/24/2002US20020154684 Adaptively configurable class-A/class-B transmit DAC for transceiver emission and power consumption control
10/24/2002US20020154679 Use of a transceiver configured for frequency modulation for signals that are coded by a method for spreading spectrums
10/24/2002US20020154677 Programmbale chaos generator and process for use thereof
10/24/2002US20020154620 Head end receiver for digital data delivery systems using mixed mode SCDMA and TDMA multiplexing
10/24/2002US20020154616 Base station apparatus, communication terminal apparatus, and communication method
10/24/2002US20020154598 Method for determining reference phase in radio communication system which uses orthogonal M-ary modulation, and coherent detection method using the same
10/24/2002US20020153945 FM demodulator capable of providing demodulated data with high determination accuracy
10/24/2002US20020153902 Circuit arrangement
10/24/2002DE19929178C2 Phasenregelkreissystem Phase locked loop system
10/24/2002DE10116747A1 Circuit layout for demodulating a voltage changes amplitude between a low and high level generating a charging voltage for each first and second charging circuit.
10/24/2002DE10114779A1 Sende-und Empfangseinheit Transmitting and receiving unit
10/23/2002EP1251667A2 Predistortion for use with amplifiers which have hyperbolic tangent distortion
10/23/2002EP1250784A1 Method for transmitting data to be transmitted using a subscriber modem
10/23/2002EP1250771A1 Wireless digital high speed communications
10/23/2002EP1250763A2 Multipath doppler-adjusted frequency tracking loop
10/23/2002EP1250752A2 Transmitter for transmitting signals over radio channels and method for transmitting signals over radio channels
10/23/2002EP1197028A4 Integrated modem and line-isolation circuitry and associated method
10/23/2002EP1076987B1 Methods and apparatus for verifying transmit power levels in a signal point limited transmission system
10/23/2002EP1034644B1 Data carrier with at least two demodulators for receiving ask signals of differing modulation index
10/23/2002EP0763295B1 Method and apparatus for coordinating multi-point-to-point communications in a multi-tone data transmission system
10/23/2002EP0761044A4 Data communications device to selectively operate as an analog modem, a digital modem, and a terminal adapter
10/23/2002CN1376352A Estimation of Doppler shift in several steps
10/23/2002CN1376336A Communication system with end-to-end quadrature balance control
10/23/2002CN1375970A 数字调制器 Digital modulator
10/23/2002CN1375969A Data transmission equipment and method of OFDM communicaltion system
10/23/2002CN1375953A Method and apparatus for computing bit logarithm likelihood ratio for orthogonal amplitude modualtion signals
10/22/2002US6470059 Automatic filter for asymmetric digital subscriber line system
10/22/2002US6470056 Offset QPSK modulation analytic system
10/22/2002US6470055 Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDN, and other systems
10/22/2002US6470053 Methods and arrangements for transmitting data over twisted pair wire using RF modulation techniques
10/22/2002US6470030 Orthogonal frequency division multiplexing receiver system
10/22/2002US6470005 Transceiver prerotation based on carrier offset
10/22/2002US6469661 Correction of I/Q channel errors without calibration
10/22/2002CA2374318C Device and method for predistorting a transmission signal to be transmitted via a nonlinear transmission path
10/17/2002WO2002082759A1 System for generating pseudorandom sequences
10/17/2002WO2002082758A1 Frequency error estimating receiver, and frequency error estimating method
10/17/2002WO2002082757A1 Amplification control scheme for a receiver
10/17/2002WO2002082756A2 Amplitude and/or phase-modulator according to the principle of envelope elimination and restoration
10/17/2002WO2002082696A2 Communication system for underwater use
10/17/2002WO2002082695A2 Underwater communication system
10/17/2002WO2002082694A1 Method and system for decoding multilevel signals
10/17/2002WO2002082673A1 Radio frequency receiver
10/17/2002WO2002082634A2 Demodulator for amplitude shift key (ask)-modulated signals
10/17/2002WO2002060143A8 Joint reduction of noise power and of the length of the channel impulse response
10/17/2002WO2002058368A3 Network termination at subscriber premises with automatic switchover to a lifeline network on power loss
10/17/2002WO2002043313A3 Space-time turbo trellis coding arrangement and method thereof
10/17/2002WO2002030030A3 Method and system for transmission in a noisy environment
10/17/2002US20020151311 Communication terminal apparatus base station apparatus and radio communication method
10/17/2002US20020151291 Antenna interface unit
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