Space-time block coding based MIMO array receiver

In this paper, a blind near-far resistant MIMO array receiver incorporated with either space-time transmit diversity (STTD) or space-time spreading (STS) schemes is proposed for time-varying multipath DS-CDMA systems, Many reported research works on MIMO, including the conventional STTD and STS schemes, often assume that the channel is flat fading and is known. However, the MIMO array receiver proposed in this study is based on a subspace-type joint space-time estimation algorithm, which does not need any power control or channel information. Furthermore, it is robust to channel estimation errors in the event of any unidentified or erroneous channel parameter. The effectiveness of the proposed approach is supported by representative examples and computer simulation studies.