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)
11/2002
11/07/2002WO2002089435A1 Controlled modulation distortion
11/07/2002WO2002089371A1 Power division multiplexing with incoherent signals and fixed powder hierarchy
11/07/2002WO2000024117A9 Method and system for down-converting an electromagnetic signal
11/07/2002US20020165626 Space-time coded OFDM system for MMDS applications
11/07/2002US20020164967 Radio receiving device and radio receiving method
11/07/2002US20020164949 Satellite communication apparatus
11/07/2002US20020163983 Receiver window design for multicarrier communication systems
11/07/2002US20020163976 Method for transmitting data
11/07/2002US20020163975 Wireless transmission device, and transmission signal mapping method
11/07/2002US20020163974 Equalized SNR power back-off
11/07/2002US20020163973 Method and apparatus for selecting an optimal swapping technique in discrete multi-tone system
11/07/2002US20020163898 Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
11/07/2002US20020163879 Multi-carrier communication with time division multiplexing and carrier-selective loading
11/07/2002US20020163475 Tunable slot antenna
11/07/2002US20020163400 Tunable ferro-electric multiplexer
11/07/2002US20020162629 Apparatus for manufacturing semiconductor device
11/07/2002DE10117563A1 Signalverarbeitung eines amplituden- und/oder phasenmodulierten Hochfrequenzsignals nach dem Prinzip des Envelope Elimination und Restoration Signal processing of an amplitude and / or phase-modulated radio frequency signal according to the principle of the Envelope Elimination and Restoration
11/07/2002DE10116874A1 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.
11/06/2002EP1255408A1 Improvements in decoders for many-carrier signals, in particular in DVB-T receivers
11/06/2002EP1255390A1 Method and Apparatus for multi-mode mobile communication
11/06/2002EP1255371A1 Method for transmitting data using pulse with modulation on a carrier, which allows synchronization in the receiver through the use of different carrier amplitude, phase or frequency for neighbouring symbols
11/06/2002EP1255370A2 Method and apparatus for the operation of comunications devices which have low and high data rates
11/06/2002EP1255359A1 Method and apparatus for cancelling radio frequency interference
11/06/2002EP1255358A2 Wireless local loop terminal and system having high speed, high resolution, digital-to-analog converter with off-line sigma delta conversion and storage
11/06/2002EP1254546A1 Method for detecting the remaining carrier power on a multi-carrier signal that is qam-modulated in the 8k mode according to the dvb-t-standard
11/06/2002EP1254545A1 Method and apparatus for a carrier frequency control in a wireless communication system
11/06/2002EP1254527A1 Integrated beamforming/rake/mud cdma receiver architecture
11/06/2002EP1254418A2 Method of designing, modelling or fabricating a communications baseband stack
11/06/2002EP1147487B1 Method for non-contacting data transmission and transponder for a non-contacting data transmission system
11/06/2002EP0928515B1 Adaptive digital feed-forward correction of RF power amplifier
11/06/2002EP0824802B1 Method of receiving and searching a signal transmitting in bursts
11/06/2002CN1378734A Method and circuit for digitally correcting frequency of signal
11/06/2002CN1378723A Framing method are synchronous wireless system therewith
11/06/2002CN1378721A Device and method for processing digital data signal in CDMA radio transmitter
11/06/2002CN1378369A Signal four phase modulation-demodulation method in high speed frequency-hopping communications
11/06/2002CN1378354A Self adaptive modulation method and radio controller and mobile communication system
11/06/2002CN1378349A VDSL initial method containing tone and space regulation
11/06/2002CN1093994C Wireless digital communication device, and pulse shaping network
11/05/2002US6477354 Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band
11/05/2002US6477215 Sampling control loop for a receiver for digitally transmitted signals
11/05/2002US6477210 System for near optimal joint channel estimation and data detection for COFDM systems
11/05/2002US6477208 Composite trellis system and method
11/05/2002US6477207 Method and apparatus for implementing a transmission connection
11/05/2002US6477196 Direct sequence spread spectrum communications receiver and method for efficient narrow-band signal excision
11/05/2002US6476746 Cellular base station having a high speed, high resolution digital-to-analog converter with off-line sigma delta conversion and storage
11/05/2002US6476744 Method and apparatus for generating pulses from analog waveforms
11/05/2002US6476734 Method and apparatus for prioritizing information protection in high order modulation symbol mapping
11/04/2002EP1188266A4 Apparatus and method for achieving symbol timing and frequency synchronization to orthogonal frequency division multiplexing signal
10/2002
10/31/2002WO2002087186A2 Channel characterization and rate selection in dsl systems
10/31/2002WO2002087184A1 Method, apparatus and system for synchronization in radio communication systems
10/31/2002WO2002087182A1 A hybrid frequency-time domain equalizer
10/31/2002WO2002087139A1 Smart antenna based spectrum multiplexing using existing pilot signals for orthogonal frequency division multiplexing (ofdm) modulations
10/31/2002WO2002087110A1 Spatial processing and timing estimation using a training sequence in a radio communications system
10/31/2002WO2002087104A2 Method for multiple access and transmission in a point-to-multipoint system over an electrical network
10/31/2002WO2002087099A1 Bandwidth-efficient wireless network modem
10/31/2002WO2002087097A1 Distortion compensating device
10/31/2002WO2002087082A1 Tunable matching circuit
10/31/2002WO2002087016A1 Ferroelectric antenna and method for tuning same
10/31/2002WO2002028041A3 Method for reducing the peak-to-average power ratio of a modulated signal
10/31/2002US20020161949 Data transmission by an alternating frequency analog signal
10/31/2002US20020160734 Direct conversion receiver architecture
10/31/2002US20020160733 Gain control device
10/31/2002US20020160731 Transmission gain controlling method and radio apparatus
10/31/2002US20020159551 Efficient multicarrier filter
10/31/2002US20020159550 DMT peak reduction without affecting transmission signal
10/31/2002US20020159544 Multi-mode quadrature amplitude modulation receiver for high rate wireless personal area networks
10/31/2002US20020159543 System and method for terrestrial high-definition television reception
10/31/2002US20020159540 Fine-frequency offset estimation
10/31/2002US20020159539 Method of estimating the carrier frequency of a phase-modulated signal
10/31/2002US20020159538 Method for wireless information transfer
10/31/2002US20020159536 Multi-channel parallel/serial concatenated convolutional codes and trellis coded modulation encoder/decoder
10/31/2002US20020159535 Method and apparatus for calculating bit log-likelihood ratios for QAM signals
10/31/2002US20020159534 Compensation of sampling frequency offset and local oscillator frequency offset in a ofdm receiver
10/31/2002US20020159533 OFDM pilot tone tracking for wireless lan
10/31/2002US20020159532 Computational circuits and methods for signal deconstruction/reconstruction in wireless transceivers
10/31/2002US20020159531 OFDM data demodulators synchronization
10/31/2002US20020159512 Communication apparatus and communication method
10/31/2002US20020159511 Transverter control mechanism for a wireless modem in a broadband access system
10/31/2002US20020159501 Data transmission and reception within a spread-spectrum communication system
10/31/2002US20020159425 Radio communication apparatus and radio communication method
10/31/2002US20020159422 Communication system using OFDM for one direction and DSSS for another direction
10/31/2002US20020159333 Hydraulically balanced reciprocating pulser valve for mud pulse telemetry
10/31/2002US20020158990 Frequency converter
10/31/2002US20020158784 Wireless local loop terminal and system having high speed, high resolution, digital-to analog converter with off-line sigma delta conversion and storage
10/31/2002US20020158717 Tunable ferro-electric filter
10/31/2002US20020158678 Tunable quadrature phase shifter
10/31/2002US20020158619 Satellite TWTA on-line non-linearity measurement
10/31/2002DE10136741A1 Circuit arrangement for regulating d.c. signal component has arrangement for influencing d.c. component connected before detector and with control input connected to comparator output
10/31/2002CA2444397A1 Method for multiple access and transmission in a point-to-multipoint system over an electrical network
10/30/2002EP1253759A1 Radio transmitter, radio receiver, and multilevel modulation communication system
10/30/2002EP1253758A1 Method of modulation by frequency division followed by frequency multiplication, and corresponding radio frequency device
10/30/2002EP1253757A1 Phase shift keying (PSK) modulator capable of reducing the peak to average power ratio
10/30/2002EP1253756A1 Method of frequency multiplication in a radio communication system
10/30/2002EP1253735A2 Extension of functionality of a cable modem
10/30/2002EP1253733A1 Radio transmitting apparatus and radio transmitting method
10/30/2002EP1253724A1 Removing Doppler shift from a spread-spectrum signal
10/30/2002EP1253708A2 Distortion canceling circuit
10/30/2002EP1252911A2 Bidirectional telemetry system and method for transmitting data at high transmission rate
10/30/2002EP1252751A1 Method of clipping signal amplitudes in a modulation system
10/30/2002CN2519284Y Mutual complementing differential peak value detecting circuit
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