Patent ID: 8335269

Claim:
An apparatus for receiving a signal to which a guard interval is added, comprising: an Inter-Symbol Interference (ISI) controller to cancel ISI in a time domain from a received signal having a time delay above the guard interval; and an Inter-Carrier Interference (ICI) controller to cancel ICI in a frequency domain from the received signal, wherein the ICI controller comprises: an ICI replica generator to generate a frequency-domain ICI replica for an adjacent symbol from which ICI has been generated; and an ICI canceller to calculate the frequency-domain ICI replica with an ICI channel estimation value obtained through channel response characteristic estimation performed on the received signal and to subtract the result of the calculation from the received signal, thereby cancelling the ICI, a channel equalizer to compensate for channel distortion caused by noise and frequency response characteristics of the received signal; and a decoder to decode the result of the compensation, a symbol selector to analyze bit-based Log-Likelihood Ratios (LLRs) for an output signal of the decoder to select a symbol to be fed back to the channel equalizer; and a mapper to map the selected symbol to a data symbol.