| 摘要 |
PROBLEM TO BE SOLVED: To efficiently remove interference components. SOLUTION: In a window function multiplying circuit 41, by being multiplied with a window function, ICIs included in OFDM time-domain signals are limited to a few adjacent carriers. In a transmission sequence estimation circuit 42, a transmission symbol sequence is estimated using OFDM frequency-domain signals and the estimated values of transmission path characteristics for all subcarriers obtained on the basis of the OFDM frequency-domain signals from which the interference components are removed. In an interference replica generation circuit 43, an interference replica is generated using the transmission symbol sequence estimated using the highly accurate estimated values of the transmission path characteristics and the estimated values of the transmission path characteristics for all the sub carriers. In a subtraction circuit 44, signals indicating the interference replica are subtracted from the OFDM frequency-domain signals and the interference components are removed. This invention is applicable to an OFDM receiver. COPYRIGHT: (C)2010,JPO&INPIT |
