The sequential maximum likelihood presumption device of the communication signal which uses the whitening pass metric, and the communication

摘要

(57) Abstract Through the communication channel which gives noise to the communication signal estimator of 1st symbol list is presumed from the communication signal which is communicated. The communication signal is received from the communication channel and is treated, 2nd symbol list is created. Whitening function is identified, desirably, whitening filter impulse response, and estimator of 1st symbol list, the sequential maximum likelihood is presumed from 2nd symbol list making use of the pass metric whitening function is included. It is desirable, candidacy symbol list is generated vis-a-vis relic symbol list, each candidacy symbol list includes relic symbol list and addition symbol postulate. Candidacy symbol list, the branching metric of symbol postulate inside 2nd symbol list and the relic symbol list which it is related, the pass metric from the pass metric and channel impulse response of the relic symbol list which whitening filter impulse you respond and are related for each candidacy symbol list is decided. At least, the relic symbol list whose one is new, desirably, those which possess the pass metric it is smaller, are chosen from candidacy symbol list. It is desirable, the pass metric is decided accumulation the branching metric. It is desirable, each branching metric, candidacy symbol list and channel impulse response reducing convolution and this convolution from 2nd symbol list, creates error list, following to the whitening filter impulse response of the error list for candidacy symbol list, significance seeking find the sum is attached, is decided. Significance calculating the size of the sum which is attached, the branching metric is calculated.