Patent ID: 8462900

Claim:
A receiver that receives transmission signals, which have been generated by multiplexing a plurality of modulated carriers, and that demodulates the received transmission signals, the receiver comprising: a transform unit operable to extract, for each symbol, a transmission signal having a duration of a useful symbol period from the received transmission signals in a time domain, and operable to transform the extracted transmission signal into demodulated data in a frequency domain; an equalization unit operable to estimate channel response data in the frequency domain based on the demodulated data, and operable to calculate equalized data in the frequency domain by equalizing the demodulated data based on the estimated channel response data; and an interference removal unit operable to, for each symbol, (i) perform upsample processing on the equalized data and the estimated channel response data so as to respectively obtain upsampled equalized data and upsampled channel response data, (ii) calculate, interference data indicating an interference component pertaining to at least one of intersymbol interference and intercarrier interference based on the upsampled equalized data and the upsampled channel response data, and (iii) perform, on the demodulated data, removal processing of the interference component based on the interference data, the intersymbol interference being caused by a signal component of at least one of a preceding symbol that precedes the symbol and a succeeding symbol that succeeds the symbol being mixed in the useful symbol period of the symbol, and the intercarrier interference being caused by a signal component of the symbol being shorter than the useful symbol period.