低复杂度的分组检测空时接收机

The Low Complexity of Group Detecting Layered Space-Time Receiver

V-BLAST接收机是提高无线通信系统传输数率的有效技术,但由于该算法存在大量的求伪逆、迫零和排序,算法的复杂度高,限制了它在实际中的应用;线性迫零(ZF)接收机和最小均方误差(MMSE)接收机复杂度低, 但性能差。该文提出了一种分组检测空时接收机,组内采用串行干扰抵消接收,与V-BLAST接收机相比,降低了算法的复杂度。仿真结果表明:所提出的基于MMSE准则下的分组检测空时接收机的性能明显好于基于迫零准则的V-BLAST接收机。

V-BLAST receiver is effective technique in achieving hign data rate in wireless communications, However, the complexity of V-BLAST is very high because much time must be consumed in performing linear nulling, successive interference canceling and sorting, and the application of V-BLAST is limited. The complexity of the ZF receiver and MMSE receiver is low, but performance is worse than V-BLAST. In this paper, a new layered space-time receiver is proposed using two stage successive interference canceling, and the complexity of new scheme is very low compared with the V-BLAST. The simulation results indicate that the performance of the proposed receiver based on MMSE is outperforms ZF V-BLAST receiver.