OFDM RECEPTION DEVICE, OFDM RECEPTION INTEGRATED CIRCUIT, OFDM RECEPTION METHOD, AND OFDM RECEPTION PROGRAM

摘要

An OFDM reception apparatus is provided that effectively suppresses a reduction in reception performance during high-speed mobile reception, thereby making it possible to achieve stable and high-speed mobile reception. To achieve this, the OFDM reception apparatus includes a transmission channel characteristic estimating unit for calculating a transmission channel characteristic value indicating phase and amplitude distortions in an OFDM signal for each sub-carrier, the phase and amplitude distortions occurring during propagation through a transmission channel, and calculating an n-th differentiation of the transmission channel characteristic value, and an interference component removing unit for using the transmission channel characteristic value and the n-th differentiation calculated for each of the sub-carriers by the transmission channel characteristic estimating unit, to remove an interference component between the sub-carriers from the OFDM signal. The transmission channel characteristic estimating unit performs a filtering process in a symbol direction with respect to the transmission channel characteristic value calculated for each of the sub-carriers to perform oversampling at intervals each smaller than a one-symbol interval, and uses transmission channel characteristic values existing in intervals each smaller than a two-symbol interval of the transmission channel characteristic values obtained by the oversampling to calculate the n-th differentiations.