MAXIMUM LIKELIHOOD SERIES ESTIMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a maximum likelihood series estimate system with a high estimate capability by updating even an optimum estimate area at any time even when an optimum estimate area of an impulse response used for estimation is changed according to a change in a transmission line characteristics, thereby enabling the use of the impulse response of the optimum estimate area at all times. ;SOLUTION: An area setting device 14 of the maximum likelihood series estimate system obtains an optimum estimate area of an impulse response of a transmission line detected by an impulse response detector 12. The maximum likelihood series estimate unit 11 estimates a maximum likelihood series by using the impulse response of the optimum estimate area for a tap coefficient and an adaptive controller 13 updates the tap coefficient by adaptive estimate. The area setting device 14 updates the optimum estimate area for each update of tap coefficient, and the adaptive controller 13 always sets the impulse response of the optimum estimate area to the maximum likelihood series estimate unit 11 as tap coefficient. Even when the characteristics of the transmission line is changed, the maximum likelihood series estimate unit 11 always estimates the maximum likelihood series depending on the impulse response of the optimum estimate area.;COPYRIGHT: (C)2000,JPO