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:
May. 31, 2005
Filed:
Jan. 15, 2002
Determining combiner weights and log likelihood ratios for symbols transmitted on diversity channels
Srikant Jayaraman, San Diego, CA (US);
Ivan Jesus Fernandez Corbaton, San Diego, CA (US);
John Edward Smee, San Diego, CA (US);
Srikant Jayaraman, San Diego, CA (US);
Ivan Jesus Fernandez Corbaton, San Diego, CA (US);
John Edward Smee, San Diego, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
Methods and apparatus are presented herein for determining log likelihood ratios (LLRs) for code symbols. Pilot and code symbols are transmitted over diversity channels, which can be modeled as a slowly time varying system. A formulation for a multipath gain vector is derived herein based on the slowly time varying model. The multipath gain vector is then solved using iterative procedures. Using the solved multipath gain vector, the LLRs for code symbols are computed.