Patent ID: 6408420
Filing Date: 2002-06-18
Classification: H03M

Abstract:
A Viterbi decoding method, which receiving data are inputted to, generates a branch metric from said receiving data, performs a ACS (add, compare and select) process for said branch metric, generates path metric values being plural states and selecting information, stores said selecting information, decides the most likelihood path based on the maximum path metric value, and traces back said stored selecting information based on said decided most likelihood path, and outputs decoded data, wherein:said receiving data are packet data, and comprising: a process, during said packet data are received, which performs generating said branch metric, said ACS process, deciding said most likelihood path and outputting said decoded data, based on a first operating clock synchronized with said packet data, and a process, at the time when the reception of said packet data is finished, which switches to a second operating clock being faster than said first operating clock, performs generating said branch metric and said ACS process and deciding said most likelihood path, based on said second operating clock.