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)
10/2003
10/14/2003CA2174343C Method and apparatus for the transmission of variable rate digital data
10/09/2003WO2003084163A1 A multiple channel wireless receiver
10/09/2003WO2003084162A1 Frequency error correction system with initial frequency estimation and feedback tracking
10/09/2003WO2003084117A1 Dmt system for reducing far end crosstalk
10/09/2003WO2003084108A1 Method of data retransmission in multi-carrier transmission and communication apparatus having data retransmission control device
10/09/2003WO2003084104A1 Calibration of a multichannel receiver
10/09/2003WO2003084097A1 Transmit processing using receiver functions
10/09/2003WO2003084052A1 Demodulation of a digitally frequency modulated analogue received signal by evaluation of the time difference between the null transitions
10/09/2003WO2003083598A1 Method for the correlate carrier joint detection
10/09/2003WO2003024014A3 Method for the adapting the bit rate of a bit stream which is to be transmitted in a communication system and corresponding communication device
10/09/2003WO2003001759A3 Cycle-by-cycle synchronous waveform shaping circuits based on time-domain superposition and convolution
10/09/2003US20030190002 Synchronizaton detection apparatus
10/09/2003US20030189995 Diversity receiver with joint phase locked loop filter
10/09/2003US20030189994 Method and apparatus for equalization and tracking of coded digital communications signals
10/09/2003US20030189988 FIR chip for use in a wireless subscriber unit
10/09/2003US20030189986 Multi-level modulation apparatus, multi-level demodulation apparatus, multi-level modulation/demodulation communication system, program and modulation/demodulation method
10/09/2003US20030189952 Synchronizing initial handshake in ADSL annex C to TTR
10/09/2003US20030189894 Frequency division multiplexing system with selectable rate
10/09/2003US20030189893 Phase sequences for timing and access signals
10/09/2003US20030189892 ARQ apparatus and method using frequency diversity in an OFDM mobile communication system
10/09/2003CA2480533A1 Transmit processing using receiver functions
10/08/2003EP1351464A2 QAM with fractional rates
10/08/2003EP1351463A2 System and method of demodulation of IFF signals
10/08/2003EP1351408A1 Digital point-to-multipoint data transmission system on an electric network
10/08/2003EP1351404A1 Multiband radio signal transmitter/receiver
10/08/2003EP1351403A2 Transceiver with front end reconfiguration
10/08/2003EP1350382A2 Power cutback configuration of digital subscriber line transceivers using public switched telephone network signaling
10/08/2003EP1350372A2 Calibrating the local oscillation frequency of a cdma receiver
10/08/2003EP1350310A2 Reduced soft output information packet selection
10/08/2003EP1192776B1 Reflecting modulator circuit comprising a negative impedance amplifier
10/08/2003EP1002292B1 Circuit for manipulation-protected reception of an ook-modulated signal
10/08/2003EP0672321B1 Improved device and method for precoding
10/08/2003CN2579091Y Customer device for data test by utilizing array processing
10/08/2003CN1448015A Multiplexing real time services and non-real time services for OFDM systems
10/08/2003CN1448014A Method, transmitter and receiver for spread-spectrum digital communication by golay complementary sequence modulation
10/08/2003CN1448011A System and method for peak power reduction in multiple carrier communications systems
10/08/2003CN1447602A Method for estimating frquencies in digital signal transmission
10/08/2003CN1447545A Method for detecting modulation modes in digital signal transmission
10/08/2003CN1447544A OFDM receiver and data demobulation method in OFDM receiver
10/08/2003CN1124009C Circuit for capturing frame sync signal in receiver
10/08/2003CN1124008C Digital signal transmission
10/08/2003CN1123997C Equalizing method for OFDM receiver and equalizer
10/08/2003CN1123976C Device and method for data encoding and frequency diversity in mobile communications system
10/07/2003US6631254 Apparatus for producing a radio-frequency signal
10/07/2003US6631174 Automatic frequency control apparatus
10/07/2003US6631171 QPSK modulation signal receiving unit
10/07/2003US6631169 Apparatus and method for GMSK baseband modulation based on a reference phase to be simplified
10/07/2003US6631168 Generating matrices to be used for the random orthogonal transformation of blocks of data in a transmission chain
10/07/2003US6631167 Process and device for transforming real data into complex symbols, in particular for the reception of phase-modulated and amplitude-modulated carriers transmitted on a telephone line
10/07/2003US6631166 Method and apparatus for signal generation and detection using unstable periodic chaotic orbits
10/07/2003US6631165 Code modulation using narrow spectral notching
10/07/2003US6631143 Methods and apparatus for frame synchronization in a digital audio broadcasting system
10/07/2003US6630820 Method and apparatus for measuring the instantaneous frequency of FM signals
10/02/2003WO2003081938A1 Soft handoff for ofdm
10/02/2003WO2003081870A1 Adaptive predistorter based on the probability distribution function of the output amplitude
10/02/2003WO2003081869A1 Adaptive rfi canceller for dsl
10/02/2003WO2003081867A1 Transmitting method and transmitting apparatus
10/02/2003WO2003081866A1 Transmission of digital information, whereby the code words are differentiated by means of a change in amplitude
10/02/2003WO2003081864A2 Method and apparatus for reducing transmitter peak power requirements using dual matrices
10/02/2003WO2003081830A2 Xdsl multi-hybrid modem with power spectral density shaping
10/02/2003WO2003081821A1 Multi-carrier transmission apparatus and multi-carrier transmission method
10/02/2003WO2003081804A1 Apparatus and method for transmitting signal in mobile communication system
10/02/2003WO2003081799A1 Variable communication system
10/02/2003WO2003081793A1 System and method for eliminating signal zero crossings in single and multiple channel communication systems
10/02/2003WO2003081768A2 Improving the efficiency of power amplifiers in devices using transmit beamforming
10/02/2003WO2003079751A2 Slicing algorithm for multi-level modulation equalizing schemes
10/02/2003WO2003003682A8 Signal dc offset correction method and device
10/02/2003WO2002071663A3 Method for reducing the out-of-band emission in am transmitters for digital transmission
10/02/2003US20030187928 Frequency mismatch compensation for multiuser detection
10/02/2003US20030186666 Frequency-timing control loop for wireless communication systems
10/02/2003US20030186659 VOFDM receiver correlation matrix processing using factorization
10/02/2003US20030185330 Phase lock loop and method for coded waveforms
10/02/2003US20030185326 Frequency drift and phase error compensation in a VOFDM receiver
10/02/2003US20030185322 Digital radio receiver
10/02/2003US20030185320 Diversity circuit demodulating OFDM-method signals and diversity receiving apparatus having said diversity circuit therein
10/02/2003US20030185319 Modified branch metrics for processing soft decisions to account for phase noise impact on cluster variance
10/02/2003US20030185317 Frequency error correction unit and method in a wireless LAN system
10/02/2003US20030185315 Frequency analyzer
10/02/2003US20030185314 Characterizing channel response in a single upstream burst using redundant information from training tones
10/02/2003US20030185311 Methods for minimizing setup time by optimizing bit allocation in multi-channel communication system
10/02/2003US20030185288 Apparatus and methods for digital-to-analog conversion
10/02/2003US20030185284 Iterative data-aided carrier frequency offset estimation for code division multiple access systems
10/02/2003US20030185192 Transmit processing using receiver functions
10/02/2003US20030185180 Carrier frequency offset estimation from preamble symbols
10/02/2003US20030185167 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
10/02/2003US20030185147 OFDM receiving apparatus and method of demodulation in OFDM receving apparatus
10/02/2003US20030184840 Phase modulator and phase modulating method
10/02/2003US20030184374 Type-based baseband predistorter function estimation technique for non-linear circuits
10/01/2003EP1349338A2 Compensation of phase and frequency errors in a multicarrier receiver
10/01/2003EP1349337A2 Multicarrier reception with interference detection
10/01/2003EP1349336A2 Provision of soft decisions which depend on cluster variance
10/01/2003EP1349335A2 Selection of interpolation method for multicarrier reception
10/01/2003EP1349284A2 Apparatus and methods for digital-to-analog conversion
10/01/2003EP1348310A2 Apparatus and method for ofdm data communications
10/01/2003EP1348286A1 Multi-carrier demodulator
10/01/2003EP1245084B1 Method and apparatus for rf common-mode noise rejection in a dsl receiver
10/01/2003EP0883951B1 Receiver with filter offset correction
10/01/2003CN1446424A Method and apparatus for modulating radio signal using digital amplitude and phase control signals
10/01/2003CN1446423A Carrier modulator used in transmitter or receiver
10/01/2003CN1446421A Apparatus for reducing DC offset in receiver
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