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:
Dec. 02, 2014
Filed:
Oct. 08, 2009
Ming-chang Tsai, San Diego, CA (US);
Ann Tsuey Jiuan Wu, San Diego, CA (US);
Hailiang Cai, San Diego, CA (US);
Ming-Chang Tsai, San Diego, CA (US);
Ann Tsuey Jiuan Wu, San Diego, CA (US);
Hailiang Cai, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Techniques for encoding a phase adjustment for a feedback signal in a closed-loop transmit diversity system. In an aspect, codewords for the phase adjustments are chosen according to a variable-length prefix code. The prefix code aspect allows the codewords to be transmitted in sequence on the feedback channel without being separated by 'commas' or demarcation symbols. The variable-length aspect provides a variety of coarse and fine phase adjustment quantization step sizes to accommodate multiple different channel scenarios. In an aspect, the length of the codewords may be further optimized according to the Huffman encoding algorithm.