Adaptive maximum likelihood sequence estimation apparatus and adaptive maximum likelihood sequence estimation method

An adaptive maximum likelihood sequence estimation apparatus comprising:

• first estimation means for estimating a transmission signal sequence from received signals on the basis of an estimated transmission path impulse response;
• second estimation means for estimating an estimated received signal at time k on the basis of the transmission signal sequence estimated by said first estimation means and a transmission path impulse response estimated at time k-1;
• error signal generation means for generating an error signal on the basis of a received signal at time k and the estimated received signal at time k from said second estimation means;
• and
• third estimation means for estimating a transmission path impulse response at time k using a predetermined adaptive algorithm on the basis of the error signal generated by said error signal generation means,
• wherein said third estimation means comprises means for estimating a transmission path impulse response by a non-recursive calculation on the basis of all candidate sequences which are transmitted during a given finite period and a received signal received during the finite period, and received signal estimation and estimation by said first estimation means are performed using the estimated transmission path impulse response.