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:
Apr. 09, 2013
Filed:
Jul. 30, 2009
Hao-ren Cheng, Miaoli County, TW;
Kuang-chung Ou, Kaohsiung, TW;
William J Mcfarland, Los Altos, CA (US);
Hao-Ren Cheng, Miaoli County, TW;
Kuang-Chung Ou, Kaohsiung, TW;
William J McFarland, Los Altos, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
This disclosure is directed to systems and methods that compensate for a phase change that results from a change in RF gain, a 'phase glitch,' that would otherwise degrade the performance of a multiple sub-carrier communication system, such as OFDM. Pilot symbols are used to estimate the phase change, allowing the pilot and data symbols to be compensated by the estimated phase change. Preferably, the compensated pilots are used to per form a second iteration of phase change estimation that determines residual phase glitch. Thus, following the second estimation of phase change, data symbols can be compensated for the estimated residual phase change.