United States Patent 7,715,463
Li May 11, 2010
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Simple and robust digital code tracking loop for wireless communication systems
Abstract
A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of a pseudonoise sequence, an error signal output generated by the despreading, and adjustment for a plurality of on-time, early and late samples, a data rate of a control signal provided as a fractional proportion of a data rate of error signals.
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Inventors: Li; Bin (Ronkonkoma, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 12/119,139
Filed: May 12, 2008
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
10425176 May., 2008 7372892
60376465 Apr., 2002
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Current U.S. Class: 375/147 ; 375/149
Current International Class: H04B 1/00 (20060101)
Field of Search: 375/147-149,130,140,144-145,367,346-349,316,267,285
