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Class Information
Number: 370/210
Name: Multiplex communications > Generalized orthogonal or special mathematical techniques > Fourier transform
Description: Subject matter utilizing a special mathematical relationship that provides a connection between information in the frequency domain and the time domain.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6654340 Differential OFDM using multiple receiver antennas Nov. 25, 2003
6650617 Reduced complexity FFT window synchronization for an orthogonal frequency division multiplexing system Nov. 18, 2003
6650653 Software-based digital receiver adaptable to multiple multiplexing schemes Nov. 18, 2003
6646980 OFDM demodulator Nov. 11, 2003
6633616 OFDM pilot tone tracking for wireless LAN Oct. 14, 2003
6628606 Coarse frequency offset estimator in orthogonal frequency division multiplexing receiver and method thereof Sep. 30, 2003
6611493 Communication, transmission and receiving method and apparatus using orthogonal frequency division multiplexing modulation system Aug. 26, 2003
6611551 OFDM channel identification Aug. 26, 2003
6603961 Diversity receiving apparatus Aug. 5, 2003
6580792 Signal detector with automatic gain control Jun. 17, 2003
6570842 System and apparatus for designing and producing signalling waveforms for direct-sequence code division multiple access communications May. 27, 2003
6563786 Orthogonal frequency division multiplexing system with selectable rate May. 13, 2003
6563841 Per-bin adaptive equalization in windowed DMT-type modem receiver May. 13, 2003
6552995 Spectrum diffusion signal analyzer and method of analyzing diffusion signal Apr. 22, 2003
6549512 MDSL DMT architecture Apr. 15, 2003
6549561 OFDM pilot tone tracking for wireless LAN Apr. 15, 2003
6549566 Bandwidth reduced multi carrier wireless transceiver and method thereof Apr. 15, 2003
6549583 Optimum phase error metric for OFDM pilot tone tracking in wireless LAN Apr. 15, 2003
6549589 Digital audio broadcasting receiver Apr. 15, 2003
6539122 Adaptive wavelet coding of hyperspectral imagery Mar. 25, 2003
6535715 Hybrid/fiber coax video and telephony communication system with poly-phase filtering Mar. 18, 2003
6529472 Generation and decoding of multi-carrier signal Mar. 4, 2003
6522626 Power line communications system and method of operation thereof Feb. 18, 2003
6512738 Apparatus for and method of receiving diversity Jan. 28, 2003
6512739 Method and apparatus for down conversion within an X-DSL receiver Jan. 28, 2003
6501730 Carrier recovery in DAB receivers Dec. 31, 2002
6490269 OFDM signal generation method and OFDM signal generation apparatus Dec. 3, 2002
6477210 System for near optimal joint channel estimation and data detection for COFDM systems Nov. 5, 2002
6473467 Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system Oct. 29, 2002
6456649 Multi-carrier transmission systems Sep. 24, 2002
6456650 Splitterless modem using harmonics reduction Sep. 24, 2002
6449246 Multicarrier personal access communication system Sep. 10, 2002
6442130 System for interference cancellation Aug. 27, 2002
6430148 Multidirectional communication systems Aug. 6, 2002
6430149 Processing circuits for complex operation Aug. 6, 2002
6400680 Data transformation of the inverse-fourier type Jun. 4, 2002
6400782 Method of frequency domain filtering employing a real to analytic transform Jun. 4, 2002
6401162 Generalized fourier transform processing system Jun. 4, 2002
6381212 Power sharing amplifier system for amplifying multiple input signals with shared power amplifiers Apr. 30, 2002
6381251 Data transmission apparatus and receiving apparatus using orthogonal frequency division multiplex modulation system Apr. 30, 2002
6381263 Receiving method and receiving apparatus Apr. 30, 2002
6366555 Method and device for controlling signal clipping in a discrete multi-tone communications system Apr. 2, 2002
6366625 Control information assigning method, control method, transmitting method, receiving method, transmitter and receiver Apr. 2, 2002
6363049 Adaptive acquisition system for CDMA and spread spectrum systems compensating for frequency offset and noise Mar. 26, 2002
6356569 Digital channelizer with arbitrary output sampling frequency Mar. 12, 2002
6351451 Digital multi-channel demultiplexer/multiplexer (MCD/M) architecture Feb. 26, 2002
6345036 OFDM transmitting/receiving device and method Feb. 5, 2002
6341123 Digital audio broadcasting receiver Jan. 22, 2002
6331975 User data indicator for discontinuous transmission Dec. 18, 2001
6314083 Frequency control device and method for frequency synchronization with multiplex signal by OFDM, receiving device, and communication device Nov. 6, 2001

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