Patent ID: 7054357
Filing Date: 2006-05-30
Classification: H04L

Abstract:
1. An error rate estimating device for estimating an error rate of a signal when decoding a signal modulated by a plurality of transmission systems or coding rates, said error rate estimating device provided with: a judging means for judging a transmission system or coding rate of the signal; a counting means for counting a number of times normalization is performed in a predetermined time period for each of the plurality of transmission systems or coding rates; state metric calculating means for calculating a state metric, wherein normalization is being performed while said state metric is being calculated; an estimating means for estimating the error rate for each signal from the correspondence between the number of times of normalization and the error rate respectively determined for each different transmission system or each different coding rate based on the number of times of normalization counted by the counting means; and a selecting means for selecting one of a plurality of error rates for each signal estimated by the estimating means.