Apparatus and method for receiving signal in wireless communication system

The present invention relates to a receiving apparatus and method for performing interference cancellation in a wireless communication system. The receiving device according to the present invention, a received signal by MIMO detecting the magnetic signal (desired signal) and a detector for estimating an interference signal, and a first decoder for iterative decoding the interference signal from the detector, a magnetic signal from the detector the repeats comprises decoding the second decoder and, LLR update unit configured to use the LLR value of the first internal decoder, updating an internal LLR value of the second decoder to. This invention can eliminate the delay caused by applying the SIC / PIC After completing the decryption, because applying the SIC / PIC while the decoder performs the iterative decoding. Interference cancellation, SOC, PIC, iterative decoding, latency, LLR