Shutai Okamura

An iterative interference canceller with log-likelihood ratio compensation for LDPC coded MIMO systems

This paper proposes a new iterative interference canceller (IIC) with log-likelihood ratio (LLR) compensation for low-density parity-check (LDPC) coded multi-input multi-output (MIMO) systems in order to mitigate the influence of error propagation. The proposed IIC compensates the LLR, which is obtained from the LDPC decoding, by adding the LLR obtained at previous turns of iteration. Computer simulation results show that the proposed the IIC with LLR compensation can obtain 3dB of Eb/N0 gain for achieving WER=10 -3 compared with the IIC without LLR compensation and requires less than 1dB of additional Eb/N0 compared with the maximum a posteriori (MAP) demodulator.