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:
Feb. 22, 2000
Filed:
Oct. 22, 1998
Charles C Wang, Arcadia, CA (US);
The Aerospace Corporation, El Segundo, CA (US);
Abstract
The turbo encoding process does not flush tail bits of the second constituent encoder at the end of a block systematic data so that this second constituent encoder is not placed in a known zero ending state but placed in any possible ending state from which backward recursion starts at all possible beginning states during decoding to estimate the systematic data while avoiding potential mismatches between the forward and backward recursions during decoding, and between the systematic and second parity-check tail bits during decoding. The modified a posterior probability second decoder implements the backward recursion starting from all possible states. Significant bit error rate improvement is had without a significant error floor in the range of interest. Iterative decoding provides iterative results that are subject to majority voting selection for improved estimations of the decoded systematic data sequence.