Equalizer and equalization method

Correction coefficient calculating unit 20 calculates a correction coefficient β so that the noise power corresponding with detected path transmission channel estimation values ​​in the adjacent path transmission channel estimation value. The noise power correcting section 21 calculates a noise power βN0 corrected. Weight calculation unit 8 inputs the noise power βN0 corrected channel estimation value H in the frequency domain, which is the output of the FFT section 7 (f) and by the noise power correction unit 21, the MMSE, calculate the weight of the equalization filter to.