ESPAR antenna assisted MIMO-OFDM receiver using sub-matrix divided MMSE sparse-SQRD detection

MIMO-OFDM with ESPAR(Electronically Steerable Passive Array Radiator) antenna diversity scheme can improve the bit error rate and obtain an improvement in the diversity gain but the computational cost for the detection process is too high. Using the MMSE sparse-SQRD algorithm for the detection process the computational cost can be considerably reduced. In this paper, we propose to use a sub-matrix divided MMSE sparse-SQRD algorithm for the detection process. The computational cost analysis and simulation results show that in average the proposed scheme can further reduce the computational cost and achieve a complexity comparable to the common MIMO-OFDM detection schemes.