瑞利衰落MIMO信道下的检测算法研究

Research on V-BLAST Detection Algorithms of MIMO system in Rayleigh Fading Channels

垂直分层空时码技术是提高无线信道数据传输速率的一种十分有效的方法。瑞利慢衰落MIMO信道下,MMSE检测算法能够很好的抑制信息流之间的干扰和噪声的增强。针对瑞利快衰落MIMO信道,依据信号模型,应用多元统计分析、串行干扰消除及最佳排序相结合的方法,给出了一种逐符号检测的MMSE-OSIC检测算法,使系统的误码性能得到了提高。仿真实验结果表明,在快、慢衰落MIMO信道条件下,SSMMSE-OSIC检测算法与MMSE-OSIC检测算法,能够有效的改善各自适用系统的误码性能,提高频带利用率。

The Vertical-BLAST is effective in achieving high data rate in wireless communication.The MMSE detection algorithms can restrain the interference among the information flow and reduce the noise in Rayleigh Slow-Fading Channels.A Symbol by Symbol MMSE-SIC detection algorithm based on its signal model is proposed to enhance the performance of signal error rate（SER） of the systems for Rayleigh Fast-Fading Channels,which combines Multi-variables Statistical Analysis,Successive Interference Cancellation and Optimal Ordering schemes.The computer simulation verifies that SSMMSE-OSIC algorithm and MMSE-OSIC algorithm are effective in improving the SER of their applicable system,and can enhance the bandwidth efficiency.