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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
7652981 Orthogonal frequency multi-carrier transmission device and transmission method Jan. 26, 2010
7652980 Orthogonal frequency division multiplexing synchronization Jan. 26, 2010
7649861 Multiple antenna multicarrier communication system and method with reduced mobile-station processing Jan. 19, 2010
7649833 Multichannel orthogonal frequency division multiplexed receivers with antenna selection and maximum-ratio combining and associated methods Jan. 19, 2010
7649831 Multi-user MIMO feedback and transmission in a wireless communication system Jan. 19, 2010
7646820 Transmission apparatus and receiving apparatus Jan. 12, 2010
7646703 Backward-compatible long training sequences for wireless communication networks Jan. 12, 2010
7643405 Compensation for residual frequency offset, phase noise and I/Q imbalance in OFDM modulated communications Jan. 5, 2010
7639748 Method and circuit for fine timing synchronization in the orthogonal frequency division multiplexing baseband receiver for IEEE 802.11a/g wireless LAN standard Dec. 29, 2009
7639599 Embedding supplementary data in an information signal Dec. 29, 2009
7633851 Generation of a guard interval in a DMT modulation transmission Dec. 15, 2009
7633850 Transmitter, receiver, transmitting method, receiving method, and program Dec. 15, 2009
7630465 Wireless communications device providing time and frequency-domain channel estimates interpolation and related methods Dec. 8, 2009
7630449 Method and receiver capable of increasing acquisition efficiency in a code division multiple access communication system Dec. 8, 2009
7630291 Transmitter apparatus, receiver apparatus, transmitting method, receiving method, and program Dec. 8, 2009
7627047 Orthogonal frequency division multiplexing (OFDM) receiver Dec. 1, 2009
7627046 Waveform generation for improved peak-to-average amplitude ratio Dec. 1, 2009
7626923 Method and apparatus of the variable points IFFT/FFT Dec. 1, 2009
7620367 Frequency domain unscheduled transmission in a TDD wireless communications system Nov. 17, 2009
7620115 Space code block coding and spreading apparatus and method for transmission diversity and CDMA diversity transmitter and CDMA mobile station receiver using the same Nov. 17, 2009
7620112 Adaptive basis functions in a multicarrier communication system Nov. 17, 2009
7619964 High doppler channel estimation for OFD multiple antenna systems Nov. 17, 2009
7616557 Method and apparatus for canceling intercarrier interference through conjugate transmission for multicarrier communication systems Nov. 10, 2009
7613245 Method and apparatus for multiplexing data and control information in wireless communication systems based on frequency division multiple access Nov. 3, 2009
7613104 Method, apparatus and computer program product providing synchronization for OFDMA downlink signal Nov. 3, 2009
7609612 Multi-carrier transmitter for ultra-wideband (UWB) systems Oct. 27, 2009
7609611 Method for transmitting an offset modulated biorthogonal multicarrier signal (BFDM/OM) Oct. 27, 2009
7606139 Preamble detection using frequency based correlation Oct. 20, 2009
7606138 Multi-symbol encapsulated OFDM system Oct. 20, 2009
7606137 Cancellation systems for multicarrier transceiver arrays Oct. 20, 2009
7602855 Method and apparatus for singular value decomposition of a channel matrix Oct. 13, 2009
7599327 Method and apparatus for accessing a wireless communication system Oct. 6, 2009
7596181 Apparatus and method for frequency synchronization in OFDM system Sep. 29, 2009
7593754 Receiving apparatus and receiving method of communication system with multiple antennas Sep. 22, 2009
7593729 Point to point link and communication method Sep. 22, 2009
7593378 SINR-based powerdown apparatus and method for a wireless communications systems Sep. 22, 2009
7590183 Generating signals for transmission of information Sep. 15, 2009
7590045 Apparatus and method for transmitting fast feedback information in a wireless communication system Sep. 15, 2009
7587212 System and method for allocating ranging slots in a broadband wireless access communication system Sep. 8, 2009
7586988 Transmitting apparatus, receiving apparatus, communication system, and multiplex timing compensation method Sep. 8, 2009
7586837 Acquisition of a gated pilot signal Sep. 8, 2009
7586836 Apparatus and method for transmitting/receiving pilot signals in a communication system using an orthogonal frequency division multiplexing scheme Sep. 8, 2009
7583766 System, and associated method, for utilizing block BLAST with PPIC in a MIMO multicode MC-CDMA system Sep. 1, 2009
7583738 Apparatus and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing communication system Sep. 1, 2009
7583736 Radio transmission device, radio reception device, and method for selecting transmission cancellation subcarriers Sep. 1, 2009
7583586 Apparatus and method for transmitting/receiving pilot signal in communication system using OFDM scheme Sep. 1, 2009
7583584 System and method for time diversity Sep. 1, 2009
7580487 Apparatus and method for estimating a carrier to interference and noise ratio in a communication system Aug. 25, 2009
7580446 Radio communication apparatus and radio communication method Aug. 25, 2009
7577216 Guard interval and FFT mode detector in DVB-T receiver Aug. 18, 2009

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