摘要
重点介绍了MIMO-OFDM系统中基于QR分解的几种信号检测算法,分析了各种算法的优缺点;指出信号检测顺序是降低误差传播的关键。基于改进的Gram-Schmidt正交排序QR检测算法用迭代运算代替矩阵求逆运算,有效地改进了传统算法的缺点,降低了计算量,使系统在复杂度和性能之间取得了良好的折中,并在最后对该算法与MMSE准则联合的算法进行了介绍。
In this paper, several signal detection algorithms based on QR decomposition as applied to MIMO-OFDM systems are studied and their characteristics are analyzed. It is a key to reduce the error probability by sorting the detection sequence. The sorted QR decomposition of the channel matrix is base on the improved Gram-schmidt, which uses iterative operation instead of contrary matrix operation, so the shortcomings of traditional detection algorithms are improved and the computational complexity is effectively reduced. This algorithm can gain the good tradeoffs between the performance and the complexity. SQRD algorithm combined with the MMSE cri- teflon algorithm is described finally.
出处
《山西电子技术》
2012年第5期53-54,69,共3页
Shanxi Electronic Technology
