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. 17, 2007
Filed:
Apr. 14, 2003
Shuzhan Xu, Allentown, PA (US);
Shuzhan Xu, Allentown, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
A turbo decoder iteratively decodes a received, encoded signal with one or more constituent decoders employing a simplified log-maximum a posteriori (SMAP) decoding algorithm. The SMAP decoding algorithm calculates reliability information as a log likelihood ratio for a log-MAP algorithm using a reduced set of path metrics recursively updated based on maximum likelihood recursion. Updated extrinsic information for a subsequent decoding may be derived from the LLR calculated by the SMAP decoding algorithm.
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