MMSE SQRD based SISO detection for coded MIMO-OFDM systems

In this paper,we propose a minimum mean square error(MMSE)sorted QR decomposition(SQRD)based soft-input soft-output(SISO)detection algorithm for coded multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM)systems.The proposed detection is derived from the SISO MMSE detection,which is a popular detection strategy for iterative receivers.For each transmitted symbol in the proposed detection,a soft successive interference cancellation(SIC)is performed based on a posteriori probabilities of past detected symbols.Simulation results show that the proposed detection,while needing less computational efforts,achieves significant performance gain compared with the SISO MMSE detection.