Signal detection for large MIMO systems using block-iterative generalized decision feedback equalizers (BI-GDFE)

This paper studies the problem of signal detection for generic MIMO channels with large signal dimensions. We propose a block-iterative generalized decision feedback equalization (BI-GDFE) receiver to recover the transmitted symbols in a block-iterative manner. By exploiting the input-decision correlation (IDC), a measure for the reliability of the earlier-made decisions, we design the feed-forward equalizers (FFEs) and feedback equalizers (FBEs) in such a way that maximized signal-to-interference-plus-noise ratio (SINR) is achieved for each iteration. We propose an IDC determination method to achieve fast and guaranteed convergence for the proposed receiver. Computer simulations are presented to illustrate the capability of the proposed receiver to achieve single user matched-filter bound for large MIMO channels with high SNR.