The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Apr. 29, 2005
Srikant Jayaraman, San Diego, CA (US);
Hao Xu, San Diego, CA (US);
June Namgoong, Chula Vista, CA (US);
Michael John Mangan, San Diego, CA (US);
Peter J. Black, San Diego, CA (US);
Srikant Jayaraman, San Diego, CA (US);
Hao Xu, San Diego, CA (US);
June Namgoong, Chula Vista, CA (US);
Michael John Mangan, San Diego, CA (US);
Peter J. Black, San Diego, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.