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)
11/2005
11/09/2005CN1694440A Timing tracking method in single carrier blocking transmission system
11/09/2005CN1694364A Device and method for down-mixing of a radio-frequency signal, which has been received by radio, to baseband
11/09/2005CN1226889C Method for contracting and enlarging signal peak value power amplitude and corresponding transmitter
11/09/2005CN1226838C Method for detecting modulation modes in digital signal transmission
11/09/2005CN1226833C Carrier recovery device of vestigial sideband receiver and method for recovery of carrier using same
11/08/2005US6963732 Subsampling communication receiver architecture with relaxed IFA readout timing
11/08/2005US6963623 Multi-system correspondence receiver
11/08/2005US6963622 Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes
11/08/2005US6963621 Method and apparatus for reducing distortion of digital data
11/08/2005US6963618 Enhanced slice prediction feedback
11/08/2005US6963617 OFDM receiver with adaptive equalizer
11/08/2005US6963616 Adaptively configurable class-A/class-B transmit DAC to transceiver emission and power consumption control
11/08/2005US6963602 Digital correction method and system
11/08/2005CA2302289C Spatio-temporal processing for communication
11/08/2005CA2297873C Receiver and receiving method
11/04/2005CA2506267A1 Multi-subband frequency hopping communication system and method
11/03/2005WO2005104589A1 Transmitter and receiver for multicarrier system and subcarrier assignment method thereof
11/03/2005WO2005104474A1 Device and method for improving signal-to-noise ratio using complementary sequences
11/03/2005WO2005104419A1 Method and apparatus to select coding mode
11/03/2005WO2005104412A1 Method and apparatus for pilot signal transmission
11/03/2005WO2005104411A1 Apparatus and method for channel estimation in an orthogonal frequency division multiplexing cellular communication system using multiple transmit antennas
11/03/2005WO2005104399A1 Spatial processing with steering matrices for pseudo- random transmit steering in a multi-antenna communication system
11/03/2005WO2005104393A2 Additional hierachical preamble for support of fdma channel in a multi-band ofdm system
11/03/2005WO2005104388A2 System for synchronizing a portable transceiver to a network
11/03/2005WO2005104352A1 Amplifier, information communication device and amplifying method
11/03/2005WO2005084288A3 Diode ring configuration for harmonic diode mixers
11/03/2005US20050245211 Transmission device
11/03/2005US20050245196 Device and method for optimally estimating the transmission spectrum by means of the simultaneous modulation of complementary sequences
11/03/2005US20050243953 DC offset cancellation for WLAN communication devices
11/03/2005US20050243952 Methods for processing a received signal in a software defined radio (SDR) system, a transceiver for an SDR system and a receiver for an SDR system
11/03/2005US20050243951 Iterative turbo decision feedback receiver
11/03/2005US20050243949 I/Q timing mismatch compensation
11/03/2005US20050243948 Frequency shift keying modulator and applications thereof
11/03/2005US20050243943 Equalising structure and method with maximum likelihood detection
11/03/2005US20050243940 Method and apparatus for generating preamble sequence for adaptive antenna system in orthogonal frequency division multiple access communication system
11/03/2005US20050243939 Pilot designing method in an uplink OFDMA system
11/03/2005US20050243938 Multicarrier modulation systems
11/03/2005US20050243937 Determination of the time delay and/or power of a multicarrier signal
11/03/2005US20050243936 Method and system for determining user location in a wireless communication network
11/03/2005US20050243935 Passive data carrier with signal evaluation means for evaluating information of a self-clocking signal
11/03/2005US20050243934 Processing auxiliary data of video sequences
11/03/2005US20050243909 Multicarrier transmission method and apparatus
11/03/2005US20050243908 Decision feedback equalizer
11/03/2005US20050243907 Method and apparatus for monitoring phase-shift keyed optical signals
11/03/2005US20050243897 Rapid acquisition spreading codes for spread-spectrum communications
11/03/2005US20050243791 Channel estimation apparatus and method for OFDM/OFDMA receiver
11/03/2005US20050243790 Continuously adjusted-bandwidth discrete-time phase-locked loop
11/03/2005US20050243220 Video receiver with reduced power mode
11/03/2005US20050243219 Integrated analog video receiver
11/03/2005US20050243218 Video receiver with adaptive image rejection
11/03/2005US20050243217 Video receiver with DC offset cancellation
11/03/2005US20050242979 Low power method and interface for generating analog waveforms
11/03/2005US20050242926 Method and system for contactless data transmission, and use of the method
11/03/2005US20050242860 FFT-based multichannel video receiver
11/03/2005DE19962340B4 Sender zum Versenden von Signalen über Funkkanäle und Verfahren zum Senden von Signalen über Funkkanäle Transmitter for sending signals through radio channels and method for transmitting signals via radio channels
11/03/2005DE102004017548A1 Radio signals detection and analysis method, involves filtering sought radio signal in receiver based on basis and target information, from antenna signal, and detecting sought parameters and contents of classified radio signals
11/03/2005DE102004017527A1 Transceiverschaltung und Verfahren zur Bereitstellung von Lokaloszillatorsignalen in einer Transceiverschaltung Transceiver circuit and method for providing local oscillator signals in a transceiver circuit
11/03/2005DE102004014203A1 Kontaktloser Datenträger mit Stromdemodulation Contact-free data carrier with Stromdemodulation
11/02/2005EP1592259A1 Processing auxiliary data of video sequences
11/02/2005EP1592192A2 Method and apparatus for generating preamble sequence for adaptive antenna system in orthogonal frequency division multiple access communication system
11/02/2005EP1592191A1 Equalising structure and method with maximum likelihood detection
11/02/2005EP1592164A2 Method and circuit arrangement for determining a sampling time by a clock signal for symbols of a modulation method
11/02/2005EP1592136A1 Adaptive demodulator
11/02/2005EP1590960A2 Method for storing and transmitting data generated by a security module
11/02/2005EP1590935A2 Method for transmitting data in a multi-carrier radio communication system
11/02/2005EP1590890A2 Reduced phase error derotator system and method
11/02/2005EP1590835A2 Asynchronous system-on-a-chip interconnect
11/02/2005EP0746931B1 Digital demodulator with frequency and timing control
11/02/2005CN1692590A Multi-carrier communication device and multi-carrier communication method
11/02/2005CN1692589A Ofdm解调器 Ofdm demodulator
11/02/2005CN1692588A OFDM demodulation apparatus
11/02/2005CN1692587A Ofdm解调器 Ofdm demodulator
11/02/2005CN1692586A Apparatus and method for generating preamble sequence in an OFDM communication system
11/02/2005CN1692584A Null symbol detection device
11/02/2005CN1692579A Base station apparatus and method for controlling transmission assignment
11/02/2005CN1691660A Quadrature modulation system
11/02/2005CN1691659A A method for synchronization in OFDM system
11/02/2005CN1691658A Apparatus and method for digital modulation
11/02/2005CN1691657A Apparatus and method for carrier acquisition of vestigial sideband (vsb) signal
11/02/2005CN1691654A Pilot-based channel estimation method for mc-cdma system using frequency interleaving
11/02/2005CN1691527A Direct conversion receiver
11/02/2005CN1690772A Quadrature amplitude modulation of optical carriers
11/02/2005CN1225938C Route finding circuit for dividing receiving signal into multiple FFT window to reduce mutual correlation number arithmetic operation
11/02/2005CN1225927C Method and apparatus for two-level weight and parallel disturbance cancellation under MPSK modulation
11/02/2005CN1225908C Signal transmission receiving apparatus, system and method
11/02/2005CN1225872C Radio communication system and station and method for operating the radio communication system
11/02/2005CN1225855C Method and apparatus for two-level weight and parallel disturbance cancellation under MQAM modulation
11/02/2005CN1225847C Error calibrator for digital broadcast receiver with phase faults compensation
11/02/2005CN1225843C Calibration of in-phase and quadrature transmit branches of transmitter
11/02/2005CN1225842C Emitter device and communication system using the device
11/01/2005US6961564 Method for enabling a subscriber entity to actively communicate in a communication network
11/01/2005US6961400 Automatic frequency correction apparatus and method of operation
11/01/2005US6961393 In-band-on-channel (IBOC) system and methods of operation using orthogonal frequency division multiplexing (OFDM) with timing and frequency offset correction
11/01/2005US6961388 Coding scheme for a wireless communication system
11/01/2005US6961386 Device and method for increasing the bandwidth in a line-connected multicarrier system
11/01/2005US6961371 Cellular communications system receivers
11/01/2005US6961369 System and method for scrambling the phase of the carriers in a multicarrier communications system
11/01/2005US6961364 Base station identification in orthogonal frequency division multiplexing based spread spectrum multiple access systems
11/01/2005US6961312 Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones
11/01/2005CA2331225C Uplink timing synchronization and access control for a multi-access wireless communication system
1 ... 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 ... 898