Receiving apparatus and method in a wireless communication system

A receiving apparatus in a wireless communication system, comprising:

• a detector for estimating at least two streams by multiple-input, multiple-output (MIMO) detecting received signals;
• decoders for iteratively decoding the streams output from the detector, the decoders detecting a sign-inverted log likelihood ratio (LLR) during the iterative decoding;
• and
• an LLR updater for, when the sign-inverted log likelihood ratio is detected from one of the decoders, updating internal LLR values of the other decoders.

A receiving method in a wireless communication system, comprising:

• estimating a desired signal and an interference signal by multiple-input, multiple-output (MIMO)-detecting received signals;
• iteratively decoding the interference signal and the desired signal respectively;
• and
• updating a log likelihood ratio (LLR) value generated during the iterative decoding of the desired signal using an LLR value generated during the iterative decoding of the interference signal.

A receiving method in a wireless communication system, comprising:

• estimating at least two streams by multiple-input, multiple-output (MIMO)-detecting received signals;
• iteratively decoding the estimated streams respectively;
• detecting a sign-inverted log likelihood ratio during the iterative decoding the estimated streams;
• and
• updating, when the sign-inverted log likelihood ratio is detected, a corresponding log likelihood ratio of the other streams being iteratively decoded.