United States Patent 7,609,794
Reznik , et al. October 27, 2009
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Reduced complexity sliding window based equalizer
Abstract
Data estimation is performed in a wireless communication system using both oversampling and multiple reception antennas. A receive vector is produced for each antenna at a sampling interval which is a multiple of the chip rate of the received signal. A channel response matrix is produced for each antenna at a preferred multiple of the sampling rate. Each receive vector is processed using a sliding window based approach, where a plurality of successive windows are processed. For each window, a combined circulant channel response matrix is produced using the channel response matrices. Using the combined circulant channel response matrix and a combined received vector comprising each received vector in a discrete Fourier transform based approach to estimate a data vector corresponding to that window; and combining the data vector estimated in each window to form a combined data vector.
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Inventors: Reznik; Alexander (Titusville, NJ), Yang; Rui (Greenlawn, NY), Li; Bin (Ronkonkoma, NY), Zeira; Ariela (Huntington, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/191,702
Filed: August 14, 2008
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
11265932 Nov., 2005
10875900 May., 2006 7042967
10791244 Mar., 2004 7428279
60482333 Jun., 2003
60452165 Mar., 2003
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Current U.S. Class: 375/347 ; 375/267; 455/101
Current International Class: H04B 7/10 (20060101)
Field of Search: 375/347,267 455/101
