United States Patent 7,889,664
Ozluturk , et al. February 15, 2011
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User equipment for detecting short codes
Abstract
A receiver employing CDMA techniques estimates background noise based on a periodically updated code. The transmitted signal includes a periodically updated code of a predetermined type and wherein the received signal has CW interference in addition to the transmitted signal. The decision circuit determines if a value representing the likelihood of detection of the code exceeds a predetermined threshold. In the case of a pilot signal not being detected within a predetermined time period which corresponds to code update period, the background noise estimator obtains a new background estimation.
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Inventors: Ozluturk; Fatih M. (Port Washington, NY), Jacques; Alexander (Levittown, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/519,540
Filed: September 12, 2006
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
10860848 Jun., 2004 7106720
10187687 Jun., 2004 6751208
09415321 Jul., 2002 6414951
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Current U.S. Class: 370/241
Current International Class: H04J 1/16 (20060101)
Field of Search: 370/328
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