Patent ID: 8094709

Claim:
An equalizer comprising an equalization filter for receiving a digitally modulated single-carrier signal as a received signal and equalizing the digitally modulated single-carrier signal and a weight calculating section for calculating an equalization weight of said equalization filter by using a transmission channel response vector in which a detected path transmission channel estimation value at a detected path timing of the received signal and an adjacent path transmission channel estimation value at an adjacent path timing thereof are concatenated, said equalizer further comprising: a noise power estimating section for estimating a noise power N 0 for use in calculation of said equalization weight by using said received signal and said detected path transmission channel estimation value; a correction coefficient calculating section for calculating a correction coefficient β by using said detected path transmission channel estimation value and said adjacent path transmission channel estimation value; and a noise power correcting section for correcting the noise power N 0 for use in calculation of said equalization weight by said correction coefficient β generated by using said detected path transmission channel estimation value and said adjacent path transmission channel estimation value, said noise power correcting section thereby obtaining a corrected noise power βN 0 , wherein said correction coefficient calculating section comprises: power adding means for calculating a detected path transmission channel power and an adjacent path transmission channel power from said detected path transmission channel estimation value and said adjacent path transmission channel estimation value, respectively, and calculating a sum power of both the detected path transmission channel power and the adjacent path transmission channel power; normalizing means for normalizing the sum power by said detected path transmission channel power to thereby obtain a normalized transmission channel power; and multiplying means for multiplying the normalized transmission channel power by a predetermined coefficient to generate said correction coefficient β.