The Blast System Architecture And The Detection Algorithm

Recently, the Bell Laboratories layered space-time (BLAST) architecture employing multiple transmit and multiple receive (MTMR) antennas has been extensively investigated to realize high data rates and increased link level reliability in wireless communications. This paper studies BLAST architectures such as D-BLAST, V-BLAST and Turbo-BLAST as well as their decoding algorithms.As one of the most promising BLAST architecture, V-BLAST has been studied extensively because it can achieve the highest data rate comparing with the other BLAST architectures. Based on two low complexity algorithms BID (Bi-Directional ZF) and PIC (Parallel Interference Cancellation), we propose a novel combination detection algorithm BID-PIC of Zero-Forcing BLAST. From the experimental results, we can see that the novel detection algorithm can achieve good performance with low computational complexity.D-BLAST suffers from boundary wastage at the start and end of each package, which becomes significant for a small packet size. V-BLAST overcomes the limitation of D-BLAST, but it does not utilize the transmit diversity. The developments of D-BLAST and V-BLAST, as well as the Turbo decoding algorithm, motivate the birth of Turbo-BLAST. Our simulation results also show the good performance of Turbo-BLAST.