A very low complexity near ML detector based on QRD-M algorithm for STBC-VBLAST architecture

STBC-VBLAST MIMO space-time codes combine spatial multiplexing with diversity gain to achieve both high spectral efficiency and link reliability. In this work, we present a new near maximum-likelihood detector based on QRD-M algorithm for DSTTD architecture. We analyze its performance in terms of Bit Error Rate and complexity. We use an uncorrelated MIMO channel model to prove the code performance and decoder complexity. We show that a near maximum likelihood detector based on QRD-M algorithm shows a better performance in terms of complexity without degradation in terms of Bit Error Rate with respect to [11] for DSTTD space-time code. Therefore, we conclude that this scheme is an attractive candidate for hardware implementation.