Patent ID: 8824605

Claim:
A receiving device comprising: a signal extraction unit configured to extract a signal of an arbitrary time duration using a received signal and a received signal replica that is a replica of the received signal in the time domain obtained from a bit-log likelihood ratio obtained by receiving processing at least one time, and perform a time-to-frequency transform on the extracted signal so as to obtain each subcarrier signal of the received signal in which at least intercarrier interference is suppressed; a propagation channel estimation unit configured to estimate a propagation channel so as to determine a propagation channel estimation value; and a symbol replica generation unit configured to generate a symbol replica that is a replica of a modulated symbol from the bit-log likelihood ratio, wherein the signal extraction unit comprises: a filter unit configured to generate the received signal replica, based on the propagation channel estimation value and the symbol replica; a subtraction unit configured to subtract the received signal replica from the received signal; an extended Fast Fourier Transform (FFT) duration extraction unit configured to extract from the signal subtracted by the subtraction unit an extended FFT duration signal that is a signal of time duration of arbitrary length so as to generate an FFT signal from the extended FFT duration signal; a time-to-frequency transformation unit configured to transform the FFT signal into a frequency-domain signal; and a reconstruction unit configured to generate a subcarrier replica signal, based on the propagation channel estimation value and the symbol replica, and add the subcarrier replica signal to the frequency-domain signal transformed by the time-to-frequency transformation unit, so as to obtain each subcarrier signal of the received signal, wherein each of said signal extraction unit, said propagation channel estimation unit, and said symbol replica generation unit comprise a circuit.