Improved Max-Log-MAP BICM-IDD receiver for MIMO systems

A novel bit-interleaved coded modulation with iterative detection and decoding (BICM-IDD) receiver for multiple-input and multipleoutput (MIMO) systems using Max-Log-MAP algorithm is proposed. This receiver improves the detection and decoding performance by an improved turbo principle, in which pre-scaling the input information of the detector is performed at each iteration. From an information theory perspective, the proposed scheme is proved to outperform the traditional iterative architecture. Simulations results show that the proposed receiver significantly reduces the performance loss incurred by the suboptimal Max-Log-MAP detection and decoding algorithm with small additional complexity.