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:
Mar. 20, 2012
Filed:
Nov. 13, 2007
Shu-mei LI, Taipei, TW;
Szu-chung Chang, Taipei, TW;
Shu-Mei Li, Taipei, TW;
Szu-Chung Chang, Taipei, TW;
Alpha Imaging Technology Corp., Hsinchu, TW;
Abstract
An ACS unit of a Viterbi decoder and a method for calculating the bit error rate (BER) before Viterbi decoder are provided. The ACS unit includes a state calculator and a BER calculator. The state calculator calculates the state metric of a corresponding target state in the trellis diagram and selects one of two candidate source states as the selected source state of the target state. The state calculator also provides a selection signal indicating the selected source state. The BER calculator is coupled to the state calculator for providing the sum of the BER of the selected source state and the bit error count (BEC) of the transition from the selected source state to the target state as the BER of the target state.