MOST LIKELIHOOD SERIES ESTIMATION APPARATUS AND MOST LIKELIHOOD SERIES ESTIMATION METHOD

摘要

A most likelihood series estimation apparatus and a most likelihood series estimation method capable of performing adaptation of a reception signal while suppressing increase of the circuit size even when the number of necessary taps is increased. An expected value generation unit 400 multiplies a channel estimation coefficient corresponding to each bit of the signals generated by a N-1-bit signal generation unit 100 and a 1-bit signal generation unit 200 and adds the multiplication results, thereby generating an expected value when a direct wave component and a delay wave component for the N taps are received. When a channel estimation coefficient of the N+1 taps is used, an extended expected value generation unit 500 generates an expected value when a delay wave component of added one tap is received. Adders 600-1, 600-2 add the generated expected values and generate a replica of a reception signal. A most likelihood series estimation unit 700 performs adaptation of the reception signal by using the reception signal and the replica of the reception signal.