Patents for H04L 27 - Modulated-carrier systems (89,721)
05/2004
05/25/2004US6741217 Tunable waveguide antenna
05/25/2004US6741211 Tunable dipole antenna
05/25/2004US6741128 Distortion canceling circuit
05/25/2004CA2413282C System and method for peak power reduction in multiple carrier communications systems
05/25/2004CA2210508C Method for the transmission of a low-rate supplementary channel in high-rate coherent optical transmission systems
05/25/2004CA2208081C Dual-mode fm/cdma communication system
05/25/2004CA2128327C Method and apparatus for the formatting of data for transmission
05/21/2004WO2004043073A1 Configuration for implementing enhanced vsb on the studio side
05/21/2004WO2004043028A1 Papr reduction
05/21/2004WO2004042988A1 A method of determining feedback in a communication system
05/21/2004WO2004042981A2 Method and apparatus for reducing a peak-to-average power ratio in an orthogonal frequency division multiplex signal
05/21/2004WO2004042974A1 Sampling clock error detecting apparatus and method, and orthogonal frequency division multiplexing (ofdm) receiver including the same
05/21/2004WO2004042949A1 Pilot symbols in communication systems
05/21/2004WO2004004260A3 Training using overhead data in a wireless communications network
05/21/2004WO2003026179A8 Mapping of bit streams into mpeg frames
05/21/2004WO2002063808A8 A system and method for data transmission in dmt-based dsl modems
05/20/2004US20040097212 Direct conversion receiver and dc offset reducing method
05/20/2004US20040097210 Multiband radio signal transmitter/receiver
05/20/2004US20040097207 Receiver to determine modulation type
05/20/2004US20040097202 Signal processing apparatus and signal processing method
05/20/2004US20040096024 Phase detector capable of detecting an accumulated value of phase displacement at a high speed and frequency stability measuring apparatus for arbitrary nominal frequency using the same
05/20/2004US20040096023 Reduced phase error derotator system and method
05/20/2004US20040096021 Communications methods for narrow band demodulation
05/20/2004US20040096019 Frequency offset calculation method using log transforms and linear approximation
05/20/2004US20040096015 Reception device, demodulator, and communication method
05/20/2004US20040096012 Method and device for transmitting and identifying a modulation type in digital communication systems by way of a phase rotation factor applied to a training sequence
05/20/2004US20040096011 Fast transmitter based on table lookup
05/20/2004US20040096010 Communications system including a narrow band modulator
05/20/2004US20040096009 Communications methods including narrow band modulation
05/20/2004US20040096007 Method for generating soft bit information from gray coded signals
05/20/2004US20040095995 Method for determining imbalance in a vector signal modulator
05/20/2004US20040095993 Method and apparatus for I/Q imbalance estimation
05/20/2004US20040095909 Method of and apparatus for amplitude tracking and automatic frequency correction of a time-division multiple-access channel
05/20/2004US20040095904 Synchronization techniques for a wireless system
05/20/2004US20040095902 Beacon signaling in a wireless system
05/20/2004US20040095899 Pilot signal transmission technique and digital communication system using same
05/20/2004US20040095895 Method for power detection of multicarrier signals, radio transmission unit and module for such a unit
05/20/2004US20040095880 Multiple access wireless communications system using a multisector configuration
05/20/2004US20040095513 Quadratic video demodulation with baseband nyquist filter
05/20/2004US20040095211 Tunable ferro-electric filter
05/19/2004EP1420558A1 Reception device, demodulator, and communication method
05/19/2004EP1420555A2 Sequence for channel estimation and method for estimating a transmission channel which uses such a sequence for channel estimation
05/19/2004EP1420521A2 Channel diagnostic systems and methods
05/19/2004EP1420520A2 Despreading of a CPM (continuous phase modulation) spread-spectrum signal
05/19/2004EP1419630A1 Monitoring upstream frequency band
05/19/2004EP1419603A1 Method for physical layer automatic repeat request for a base station
05/19/2004EP1419597A1 Method for improving quality of transmitted data using loopback during operation
05/19/2004EP1419594A2 Method and apparatus implementing retransmission in a communication system providing h-arq
05/19/2004EP1419582A1 System and method performing quadrature amplitude modulation by combining co-sets and strongly coded co-set identifiers
05/19/2004EP1316144B1 Receiver circuit, especially for mobile radiotelephony
05/19/2004EP1118195B1 Method and apparatus for demodulating and equalizing an am compatible digital audio broadcast signal
05/19/2004EP0981864B1 Integrable radio receiver circuit for frequency-modulated digital signals
05/19/2004DE10350700A1 Device for suppressing noise in received electronic information transmission signal has controller for controlling adaptive filter mode depending on whether received signal contains signal of interest
05/19/2004DE10251313A1 Gemeinsame Benutzung eines Schaltkreises für Frequenz- und Phasenfehlerkorrektur Sharing a circuit for frequency and phase error correction
05/19/2004DE10122698B4 Verfahren zur Bestimmung von Modulationsverfahren für Unter-Träger eines OFDM-Symbols A method for determining modulation schemes for sub-carrier of an OFDM symbol
05/19/2004CN1498478A Coding scheme for wireless communication system
05/19/2004CN1498475A Method and apparatus for performing digital communicatons
05/19/2004CN1498474A Multi-carrier communication with time devision multiplexing and carrier-selective loading
05/19/2004CN1498457A Direct conversion receiver and DC offset reducing method
05/19/2004CN1497964A Device for decoing video signal of different form coded
05/19/2004CN1497963A Device and method of carrier recovery for high-definition TV. receiver
05/19/2004CN1497918A Single carrier transmission system able to adapting change of dynamic environment and its method
05/19/2004CN1497917A Single carrier transmission system able to adapting change of dynamic environment and its method
05/19/2004CN1497916A Single carrier transmission system able to reducing signal distortion and its method
05/19/2004CN1497886A Orthogonal frequency division multiplex signal equalizer, method, program, ground digital broadcast receiver
05/19/2004CN1497885A Radio communication system, method, and emitting and receiving device suitable for said system and mathod
05/19/2004CN1497884A Single carrier transmission system and its method
05/19/2004CN1497883A Single carrier transmission system and its method
05/19/2004CN1497863A Method of emitting data code element to user in ultra wide band telecommunication system
05/19/2004CN1497847A Data converter, signal generator, emittor, communication equipment and data converting method
05/19/2004CN1497836A Electronic circuit, modulating method, information processing devcie and information processing method
05/19/2004CN1150770C Convolutional decoder
05/19/2004CN1150751C Apparatus for decoding video signals encoded in different formats
05/19/2004CN1150730C Constrained-envelope digital-communications transmission system and method thereof
05/19/2004CN1150729C High-speed upstream modem communication
05/19/2004CN1150694C Modulation system and methods including oversampling of narrow bandwidth signals and DC offset compensation
05/19/2004CN1150682C Digital variable symbol rate modulation
05/18/2004US6738979 Satellite broadcast receiver which is not influenced by unnecessary signal components
05/18/2004US6738608 Frequency-timing control loop for wireless communication systems
05/18/2004US6738443 Optimized synchronization preamble structure
05/18/2004US6738440 Subscriber line transmission systems
05/18/2004US6738433 Quadricorrelator for a demodulator for frequency-modulated signals
05/18/2004US6738431 Method for neutralizing a transmitter tube
05/18/2004US6738430 Apparatus and method for digital wireless communications
05/18/2004US6738429 Decision-directed carrier frequency detector and method for QAM
05/18/2004US6738418 Method and apparatus for adaptive data allocation in a multi-carrier communication system
05/18/2004US6738415 Bi-directional communication system
05/18/2004US6738414 Radio and communication method using a transmitted intermediate frequency
05/18/2004US6738375 Packet configuring method and packet receiver
05/18/2004US6738370 Method and apparatus implementing retransmission in a communication system providing H-ARQ
05/18/2004US6738359 Communication format control method and apparatus
05/18/2004US6738102 Local digital television signal generator
05/18/2004US6737973 Amplifier modulation
05/18/2004US6737930 Tunable planar capacitor
05/18/2004US6737918 Distortion compensation apparatus
05/18/2004CA2259818C Communication system
05/13/2004WO2004040924A1 Method and apparatus for tailoring carrier power requirements according to availability in layered modulation systems
05/13/2004WO2004040897A2 Maximizing power and spectral efficiencies for layered and conventional modulations
05/13/2004WO2004040871A1 Modulation device, demodulation device, modulation/demodulation system, modulation method, demodulation method, modulation program, computer-readable recording medium containing the modulation program, demodulation program, and computer-readable recording medium containing the demodulation program
05/13/2004WO2004040870A1 A method and system for broadband predistortion linearizaion