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:
Jan. 25, 2011
Filed:
Apr. 04, 2007
Brian K. Gutcher, Loveland, CO (US);
Kripa Venkatachalam, Fort Collins, CO (US);
Brian K. Gutcher, Loveland, CO (US);
Kripa Venkatachalam, Fort Collins, CO (US);
LSI Corporation, Milpitas, CA (US);
Abstract
Methods, apparatus, and systems for generating bit-wise reliability information using a soft output Viterbi algorithm ('SOVA') in an nT Viterbi decoder implementation devoid of 1T metric information. At each nT clock pulse 1T equivalent metric values are determined from the current nT metric information. 1T equivalent metric information is determined as values that sum to the corresponding nT metric information. Subtraction is then used to determine state metric difference information from the 1T equivalent metric values. The state metric difference information may then be used to estimate log likelihood ratio information for use in the SOVA algorithm to determine bit-wise reliability information.