一种基于RAKE接收的空时分层码

A new BLAST based on RAKE reception

提出一种基于RAKE接收的空时分层码,在空时分层码的基本结构之上引入正交扩频码,使得接收机可以充分利用接收信号中的正交信息,抑制来自其他发射天线的干扰;接收机采用基于RAKE接收原理的译码器,提取每个接收天线接收信号中的相应"层"的信息,以形成有效的判决统计量.仿真结果说明,基于RAKE接收的空时分层码性能要优于基于迫零算法的空时分层码,在低信噪比情况下也优于空时分组码.

A new BLAST is proposed, which introduces orthogonal spreading sequences to the original system using the basic structure of BLAST. The receiver suppresses interferences from other antennas by the orthogonal information contained in the received signals. The information from the corresponding 'layer' is extracted from every receive antenna by the RAKE receiver to form efficient statistic decision. Simulation results show that the performance achieved by the proposed BLAST outperforms ZF-based BLAST and STBC in the case of a low SNR.