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)
08/2002
08/22/2002US20020113649 Long subscriber loops using modified load coils
08/21/2002EP1233603A2 Methods and apparatus for verifying transmit power levels in a signal point limited transmission system
08/21/2002EP1233594A1 Data communication quality control system, transmitter system and receiver
08/21/2002EP1233558A1 Communication device and communication method
08/21/2002EP1233557A1 Multicarrier transmitter and multicarrier transmission method
08/21/2002EP1233539A1 Receiver and adaptive equalizing method
08/21/2002EP1233535A1 Phase rotation measuring device and radio base station device having the same
08/21/2002EP1233534A1 Radio receiver
08/21/2002EP1233532A1 Cdma modulation method and device therefor
08/21/2002EP1233526A1 Direct conversion receiver
08/21/2002EP1233404A2 Discriminator for differently modulated signals and method for reproducing original music data code
08/21/2002EP1232636A1 Method and apparatus for impairment diagnosis in communication systems
08/21/2002EP1232623A1 A hierarchical qam transmission system with varying grouping factor
08/21/2002EP1232622A1 Error detection/correction coding for hierarchical qam transmission systems
08/21/2002EP1232621A1 Center of gravity control for hierarchical qam transmission systems
08/21/2002EP1232601A2 Background communication using shadow of audio signal
08/21/2002EP1232600A1 Multi-carrier transmission system
08/21/2002EP1232593A1 Multicarrier digital transmission system using an oqam transmultiplexer
08/21/2002EP1232591A1 Method and apparatus for transmission and reception of fm in-band on-channel digital audio broadcasting
08/21/2002EP1232587A1 Method and apparatus for generating an rf signal
08/21/2002EP1232569A2 Method and apparatus for characterization of disturbers in communication systems
08/21/2002EP0847638A4 Audio file distribution and production system
08/21/2002CN1365583A Automatic frequency allocation (AFA) for wireless office systems sharing the spectrum with public systems
08/21/2002CN1365559A Soft base digital receiving adaptable to various multiplexing systems
08/21/2002CN1365549A Transmission system for high speed signal in apparatus
08/21/2002CN1365538A 增益控制装置 Gain control means
08/21/2002CN1365218A Production method for input code flow directly driving meter modulation signal and application circuit
08/21/2002CN1365212A Effective bandwidth modulation in communication system
08/21/2002CN1089513C Two-wire modem and its communication method
08/20/2002US6438363 Wireless modem alignment in a multi-cell environment
08/20/2002US6438186 Carrier phase derived symbol timing
08/20/2002US6438183 Digital audio broadcast receiver and tuning method thereof
08/20/2002US6438179 Frequency demodulation apparatus and method
08/20/2002US6438177 Digital satellite broadcasting receive in which loop bandwidth of PLL circuit is changed at the time of centering
08/20/2002US6438176 Digital gaussian frequency shift keying modulator
08/20/2002US6438174 Multi-carrier transmission systems
08/20/2002US6438173 Multicarrier transmission system for irregular transmission of data blocks
08/20/2002US6438164 Technique for minimizing decision feedback equalizer wordlength in the presence of a DC component
08/20/2002US6438161 Method of designing an equalizer
08/20/2002US6438112 Device and method for coding information and device and method for decoding coded information
08/20/2002US6437693 FSK receiver
08/20/2002US6437641 Method and apparatus for improving the efficiency of power amplifiers, operating under a large peak-to-average ratio
08/20/2002CA2266114C Technique for communicating digitally modulated signals over an amplitude-modulation frequency band
08/15/2002WO2002063845A1 Method and apparatus for reducing peak to average power ratio in a multi-carrier modulation communication system
08/15/2002WO2002063843A2 System and method of signal wave shaping for spectrum control of an ofdm signal
08/15/2002WO2002063842A2 Interpolator for timing recovery circuit
08/15/2002WO2002063841A2 Physical layer interface for a local communication system
08/15/2002WO2002063808A1 A system and method for data transmission in dmt-based dsl modems
08/15/2002WO2002063769A1 Digital communication system and method for increased bit rates
08/15/2002WO2002052521A3 Radiofrequency receiver for remote meter reading and remote meter reading method comprising same
08/15/2002WO2002028044A3 Intervote modulator
08/15/2002WO2002009381A3 Data transmission using pulse width modulation
08/15/2002WO2002009379A3 Transmission of main and auxilliary data using pulse width modulation
08/15/2002WO2002007333A3 Phase modulator using a frequency synthesizer
08/15/2002US20020111199 Wireless communication apparatus processing intermittent data
08/15/2002US20020111148 Communications system and corresponding receiver unit
08/15/2002US20020110214 Circuit assembly for generating a phase-locked frequency-modulatable carrier frequency signal
08/15/2002US20020110202 Receiver
08/15/2002US20020110201 Balancing amplitude and phase
08/15/2002US20020110200 Method for quadrature phase decoding allowing for skipped states
08/15/2002US20020110189 Method and apparatus for a frequency agile variable bandwidth transceiver
08/15/2002US20020110187 Method and apparatus for providing domain conversions for multiple channels and applications thereof
08/15/2002US20020110154 High data rate CDMA wireless communication system
08/15/2002US20020110138 Link quality determination of a transmission link in an OFDM transmission system
08/15/2002CA2403324A1 Timing recovery circuit in a qam demodulator
08/14/2002EP1231801A2 Wireless communication apparatus processing intermittent data
08/14/2002EP1231747A2 Sequence estimation method and apparatus
08/14/2002EP1231731A1 Procedure and device for transmission of symbols using BICM-Turbo
08/14/2002EP1230774A1 Use of a transceiver based upon frequency modulation for signals that are coded by means of a method for spreading spectrums
08/14/2002EP1230772A1 Method and system for blind detection of modulation
08/14/2002EP1230771A1 Analogue front end with multilevel sigma-delta modulator for adsl
08/14/2002EP1230759A1 Programmable synchronization unit for a signal receiver
08/14/2002EP1230733A1 Adsl filter
08/14/2002EP0941594A4 Carrier phase synchronization by reverse playback
08/14/2002DE10104107A1 Empfänger für Zeitzeichensignale Receiver for time signals
08/14/2002CN1364373A Transmission gain regulating method and radio device
08/14/2002CN1364372A Method of and receiver for detecting presence of data
08/14/2002CN1364371A Method of and radio terminal for detecting presence of A 2-FSK signal
08/14/2002CN1364369A Preamble receiving device and method
08/14/2002CN1364358A Radio communication apparatus and method
08/14/2002CN1364348A Reduction of peak-to-average power ratio in mobile telecommunications system
08/13/2002US6434583 Fast fourier transform apparatus and method
08/13/2002US6434205 Digital broadcast receiver using weighted sum of channel impulse response data to adjust sampling window
08/13/2002US6434204 Method and system for DC offset correction of a quadrature modulated RF signal
08/13/2002US6434203 Memory architecture for map decoder
08/13/2002US6434201 Simply-constructed digital radio communication system capable of changing transmission capacity mode
08/13/2002US6434200 TCM revisiting system and method
08/13/2002US6434199 2N-QAM macrocell
08/13/2002US6434188 Differential encoding arrangement for a discrete multi-tone transmission system
08/13/2002US6434119 Initializing communications in systems using multi-carrier modulation
08/13/2002US6434091 Information record disc and information recording apparatus
08/13/2002US6433718 D/A conversion method and apparatus
08/13/2002US6433631 RF slipring receiver for a computerized tomography system
08/13/2002US6433630 Phase shifter, and demodulator employing it
08/13/2002US6433604 Phase adjustment technique
08/13/2002US6433591 Frequency-voltage conversion circuit and receiving apparatus
08/08/2002WO2002062030A1 Maximum likelihood synchronisation for a communications system using a pilot symbol
08/08/2002WO2002062029A2 Compensation method for a transceiver using two-point modulation
08/08/2002WO2002062002A1 Coding scheme for a wireless communication system
08/08/2002WO2002061997A2 Dvcpro wireless transmission system using cofdm
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