An iterative detection algorithm for MIMO systems with concatenated codes
Yan Wang · 2015
An outer decoder feedback-iterative detection and decoding( ODF-IDD) algorithm is proposed for BCHLDPC coded MIMO systems. Based on the iterative detection and decoding( IDD) algorithm,a feedback after outer hard-decision decoder is added. The feedback hard-decision information from the BCH decoder is processed in the MIMO detector and used to update the detecting list after the mapping treatment,thus the computational complexity of the iterative detection decoding algorithm can be reduced by this step. Some of the initial probabilities for some parts of LDPC decoder are calculated directly using the feedback information from the outer decoder,which makes the soft information more reliable and therefore improves the system performance. The simulation results showed that the proposed algorithm can decrease the average number of detection times by 57.1% per frame and thus reduce the computation complexity of the receiver. Meanwhile,the proposed algorithm has a performance gain of 0. 2 d B at least due to the feedback from the BCH decoder.