Patent ID: 6650713
Filing Date: 2003-11-18
Classification: H04L

Abstract:
A maximum likelihood sequence estimation (MLSE) apparatus for estimating a maximum likelihood sequence, which comprises:a first and second memory for storing received signal; an impulse response detection means for detecting impulses in training signal included in said received signal; a range setting means for selecting an optimum range among said impulses and for renewing a timing signal (TS) on the basis of said optimum range and for outputting the renewed timing signal (TSRN); an adaptive control means for controlling said first and second memory and for outputting â€œjâ€  tap coefficients; and a MLSE means for estimating said maximum likelihood sequence on the basis of said â€œjâ€  tap coefficients, wherein: said first memory outputs, to said MLSE means, said received signal by using a first timing which is designated by said TSRN; said second memory outputs, to said adaptive control means, said received signal by using a second timing which is defined by (said first timingâ€”t), namely said first timing subtracted by â€œtâ€ , where â€œtâ€  is equal to (j+u), where â€œjâ€  is a tap length of said MLSE means and â€œuâ€  is a length of a forward range in said adaptive control means; said adaptive control means renews said impulses on the basis of said received signal outputted from said second memory, said maximum likelihood sequence outputted from said MLSE means, and said impulses in said optimum range outputted from said range setting means.