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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:

Patent Number Title Of Patent Date Issued
8000224 Receiver and frequency information estimating method Aug. 16, 2011
8000222 Wireless communication device adopting OFDM modulation Aug. 16, 2011
7995672 Method and apparatus for reception in a multi-input-multi-output (MIMO) orthogonal frequency domain modulation (OFDM) wireless communication system Aug. 9, 2011
7995665 Method and apparatus for reception in a multi-input-multi-output (MIMO) orthogonal frequency domain modulation (OFDM) wireless communication system Aug. 9, 2011
7991089 Inter-carrier interference removal device and reception device using the same Aug. 2, 2011
7991069 Method for adapting filter cut-off frequencies for the transmission of discrete multitone symbols Aug. 2, 2011
7991061 Transmitting device and control method thereof Aug. 2, 2011
7990953 Systems and methods for utilizing a spare switch in a distributed VOIP system Aug. 2, 2011
7990845 System and method for FFT window timing synchronization for an orthogonal frequency-division multiplexed data stream Aug. 2, 2011
7990842 Backward-compatible long training sequences for wireless communication networks Aug. 2, 2011
7986743 Method for transmitting a digital data stream, transmitter, method for receiving a digital data stream and receiver Jul. 26, 2011
7986615 Demodulating circuit, demodulating method, program, and receiving device Jul. 26, 2011
7986614 Delay restricted channel estimation for multi-carrier systems Jul. 26, 2011
7983356 Enhanced frequency domain spreading Jul. 19, 2011
7983233 Apparatus for phase noise suppression for OFDM based WLANS Jul. 19, 2011
7983145 DFT spread OFTM Jul. 19, 2011
7978776 Channel estimation device and related method of an orthogonal frequency division multiplexing system Jul. 12, 2011
7978593 Method for transmitting control information to instruct receiver Jul. 12, 2011
7974329 Method and apparatus for timing estimation in a wireless communications system Jul. 5, 2011
7974181 Systems and methods for transmit-only peak-to-average ratio reduction in the oversampled regime using reserved tones Jul. 5, 2011
7974180 Transmitting/receiving apparatus of wideband wireless channel apparatus using multiple carriers Jul. 5, 2011
7974176 Systems, methods and transceivers for wireless communications over discontiguous spectrum segments Jul. 5, 2011
7970067 OFDM receiver and method for enhancing channel estimation performance in communication environment where high doppler frequency exists Jun. 28, 2011
7970064 Transmitter, method for generating a plurality of long preambles and communication device Jun. 28, 2011
7969860 Transmitter apparatus, receiver apparatus, transmitting method, receiving method, and program Jun. 28, 2011
7965799 Block boundary detection for a wireless communication system Jun. 21, 2011
7961811 Radio transmitting apparatus and radio transmitting method Jun. 14, 2011
7961809 Method and apparatus for multi-user multi-input multi-output transmission Jun. 14, 2011
7961593 Downlink acquisition Jun. 14, 2011
7961591 OFDM communication systems, transmitters and methods Jun. 14, 2011
7961587 Systems and methods for reducing peak to average cross-correlation for sequences designed by alternating projections Jun. 14, 2011
7957476 Wireless communicaton apparatus Jun. 7, 2011
7957265 Systems and method for orthogonal frequency divisional multiplexing Jun. 7, 2011
7957260 WiMAX system analyzer having RAS emulation function and method of acquiring UL synchronization and testing PSS using the same Jun. 7, 2011
7953190 Parallel preamble search architectures and methods May. 31, 2011
7953059 Apparatus and method for detecting feedback information in a wireless communication system May. 31, 2011
7952991 Method and apparatus for transmitting and receiving control information in a single carrier FDMA system May. 31, 2011
7949034 Apparatus and method for estimating uplink frequency offset in wireless communication system May. 24, 2011
7948960 Radio transmission device May. 24, 2011
7948868 Method and arrangement relating to the insertion of pilot tones in the frequency domain in SC-FDMA May. 24, 2011
7944983 Coarse carrier frequency offset estimation for CMMB mobile TV receiver May. 17, 2011
7944808 OFDM symbol design for different channel conditions and for backward compatibility with 1xEV-DO and NxEV-DO May. 17, 2011
7933357 Apparatus and method for transmission and reception in a multi-user MIMO communication system Apr. 26, 2011
7933343 Enhanced OFDM by use of alternating polarization states Apr. 26, 2011
7933196 Method and apparatus for canceling channel interference Apr. 26, 2011
7929645 Method and apparatus for channel estimation in OFDM receivers Apr. 19, 2011
7929620 Blind channel estimation in an orthogonal frequency division multiplexing system Apr. 19, 2011
7929511 Method and apparatus for producing/recovering OFDM/OFDMA signals Apr. 19, 2011
7929417 Method of allocating reference signals in MIMO system Apr. 19, 2011
7929414 Modified SLM scheme with low complexity for PAPR reduction of OFDM systems Apr. 19, 2011

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