United States Patent 7,593,453
Lomp , et al. September 22, 2009
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Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
Abstract
A spread spectrum signal having an associated code is tracked at a receiver. A plurality of components of the spread spectrum signal are despread using the associated code. Each of the plurality of components has a different code phase than all others of the plurality of code phases. Each of the plurality of components is weighted based on a phase difference between that component and a center code phase associated with the plurality of components. A tracking error is determined based on the weighted components.
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Inventors: Lomp; Gary R. (Centerport, NY), Ozluturk; Faith (Port Washington, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 10/788,209
Filed: February 26, 2004
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
10071899 Feb., 2002 6744809
09261689 Apr., 2002 6381264
08669771 Jun., 1999 5912919
60000775 Jun., 1995
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Current U.S. Class: 375/149 ; 370/515; 375/145; 375/367
Current International Class: H04B 1/69 (20060101); H04B 1/707 (20060101); H04B 1/713 (20060101)
Field of Search: 375/149,145,134,137,148,362,367 370/515,516,517
