Tuesday, May 11, 2010 9:15:35 AM
Pietraski May 11, 2010
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Wireless communication method and apparatus for performing post-detection constellation correction
Abstract
A method and apparatus for correcting the phase and gain of data associated with a constellation pattern of a plurality of received individual symbols. Each symbol is divided into real and imaginary symbol components. The signs of the real and imaginary symbol components of each symbol are determined and used as a basis for determining whether the symbol is associated with a first or third quadrant of the constellation pattern or a second or fourth quadrant of the constellation pattern. The absolute values of the real and imaginary symbol components are determined and used to create a first sum and a second sum. A phase adjustment value .theta. and a gain adjustment value G are derived from the first and second sums, and are used to create a complex number. Each of the received individual symbols is multiplied by the created complex number to provide corrected constellation pattern data.
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Inventors: Pietraski; Phillip J. (Huntington Station, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/274,806
Filed: November 20, 2008
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
11506221 Aug., 2006 7460617
10980692 Sep., 2006 7106811
60519102 Nov., 2003
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Current U.S. Class: 375/324
Current International Class: H04L 27/00 (20060101)
Field of Search: 375/264,261,269,259,316,268,320,324,327,340,345,354,371,377 714/46,699 370/207,206,203,430 329/304 342/194 455/127.2
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