Patent ID: 8413030

Claim:
A wireless communication system for communicating a radio signal, the system including a transmitter for transmitting a radio signal and a receiver for receiving the radio signal, wherein the transmitter comprises a signal transmitter for transmitting a radio signal to the receiver, and wherein the receiver comprises: a signal receiver for receiving a radio signal and processing the radio signal into a received signal; a pilot signal selector for separating a pilot signal from the received signal; a propagation path estimation part for estimating information on a radio signal propagation path using the pilot signal selected by the pilot signal selector; a propagation path correction part for correcting an effect of the propagation path using the propagation path information estimated by the propagation path estimation part, the effect being contained in the received signal; a demapping part for calculating a soft decision likelihood value by comparing the received signal having had the effect thereon of the propagation path corrected at the propagation path correction part and a reference signal, the soft decision likelihood value representing correctness, estimated from the received signal having had the effect thereon of the propagation path corrected, of the signal transmitted from the signal transmitter; a soft decision likelihood weighting part for calculating a weight according to a relationship between the pilot signal and the received signal and multiplying the soft decision likelihood value corresponding to the received signal by the weight; and an error correction decoder for performing error correction decoding using the soft decision likelihood value multiplied by the weight.