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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
7577087 Faster fine timing operation in multi-carrier system Aug. 18, 2009
7574179 Mobile broadband wireless network with interference mitigation mechanism to minimize interference within a cluster during multiple concurrent transmissions Aug. 11, 2009
7573807 Method and apparatus for performing differential modulation over frequency in an orthogonal frequency division multiplexing (OFDM) communication system Aug. 11, 2009
7573805 Data transmission and reception method and apparatus Aug. 11, 2009
7564909 Apparatus and method for detecting ranging signal in an orthogonal frequency division multiple access mobile communication system Jul. 21, 2009
7564908 Method and apparatus for encryption of over-the-air communications in a wireless communication system Jul. 21, 2009
7561637 Determination of a channel estimate of a transmission channel Jul. 14, 2009
7561628 Apparatus and method for cell acquisition and downlink synchronization acquisition in a wireless communication system Jul. 14, 2009
7561626 Method and system for channel estimation in a data transmission system Jul. 14, 2009
7561511 Configurable OFDM transceiver Jul. 14, 2009
7558238 Hybrid multiple access waveform, method, and apparatus Jul. 7, 2009
7554902 Preamble design for frequency offset estimation and channel equalization in burst OFDM transmission system Jun. 30, 2009
7551677 OFDM pilot tone tracking for wireless LAN Jun. 23, 2009
7551545 Subband-based demodulation for an OFDM-based communication system Jun. 23, 2009
7548522 Orthogonal frequency division multiplexing wireless communication operable on frequency selective channel, and channel compensation method Jun. 16, 2009
7545770 Radio communication system and radio communication method Jun. 9, 2009
7542531 Digital cancellation of radio frequency interference Jun. 2, 2009
7542407 System and method for communicating digital information using time-and-frequency-bounded base functions Jun. 2, 2009
7539255 Using multiple pilot signals for timing error estimation in digital subscriber line communications May. 26, 2009
7539123 Subcarrier puncturing in communication systems May. 26, 2009
7535975 QAM mapping and bit labeling or bit-interleaved coded modulation May. 19, 2009
7535820 OFDM signal receiving apparatus and OFDM signal receiving method May. 19, 2009
7532567 Radio communication system, radio transmitter and radio receiver May. 12, 2009
7532564 Sub-banded ultra-wideband communications systems May. 12, 2009
7532563 Mechanism to improve quality of channel estimates in OFDM transmissions May. 12, 2009
7526042 OFDM system receiver apparatus suppressing inter-symbol interference Apr. 28, 2009
7522515 Method and system for providing window shaping for multiline transmission in a communications system Apr. 21, 2009
7522514 Systems and methods for high rate OFDM communications Apr. 21, 2009
7508751 Method and apparatus for transmitting uplink fast feedback information in an OFDMA communication system Mar. 24, 2009
7508750 Apparatus and method for improving signal-to-noise ratio in a multi-carrier CDMA communication system Mar. 24, 2009
7502312 Fourier-transform based linear equalization for CDMA downlink Mar. 10, 2009
7499496 Transmitter and transmission controlling method Mar. 3, 2009
7496028 Apparatus and method for minimizing PAPR in an OFDM communication system Feb. 24, 2009
7492703 Noise analysis in a communication system Feb. 17, 2009
7489622 Transmitting apparatus, receiving apparatus, communication system, transmission method, reception method, and communication method Feb. 10, 2009
7489621 Adaptive puncturing technique for multicarrier systems Feb. 10, 2009
7486609 European digital audio broadcast receiver having a simply implementable fast fourier transform processor and an operation method therefor Feb. 3, 2009
7483491 Linear transformation circuits Jan. 27, 2009
7483365 Process for obtaining notches in the transmission of signals over the electricity network Jan. 27, 2009
7482958 OFDM receiver Jan. 27, 2009
7480353 Method and apparatus for estimating channel response and receiver apparatus using the estimated channel response for OFDM radio communication systems Jan. 20, 2009
7477683 Periodic DMT signals with cyclic extension Jan. 13, 2009
7474611 Reduced complexity channel estimation in OFDM systems Jan. 6, 2009
7471621 Method and apparatus for dynamic adjustment of orthogonal frequency-division multiplexing during congested conditions Dec. 30, 2008
7463576 Channel estimation for OFDM communication systems Dec. 9, 2008
7460559 Methods and sets of piconets using time frequency division multiple access Dec. 2, 2008
7460553 Process for multiple access and multiple transmission of data in a multi-user system for the point to multipoint digital transmission of data over the electricity network Dec. 2, 2008
7460509 Method and apparatus for isochronous datagram delivery over contention-based data link Dec. 2, 2008
7453794 Channel estimation and synchronization with preamble using polyphase code Nov. 18, 2008
7450653 Digital broadcast signal receiving apparatus and method Nov. 11, 2008

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