差分空时系统的天线选择算法

Antenna selection algorithm for differential space-time system

一般的天线选择算法都需要信道状态信息,根据信道参数选择天线。然而,估计多输入多输出(MIMO)系统的信道参数大大增加了系统复杂性,而且,在快衰落信道中,信道估计是很困难的。基于正交空时编码和接收信号向量的范数,提出了非相干的天线选择算法(NON-AS),不需要估计信道,并将算法应用于差分空时系统。性能分析和仿真结果表明,在高信噪比情况下,NON-AS算法能实现和完全复杂性系统同样的分集增益。

In general, algorithm of antenna selection requires channel states information, and the chosen antennas have to satisfy the characteristic of channel parameters. For MIMO systems, the estimation of channel parameters will enlarge greatly the system complexity, especially it is very difficult to estimate e channel parameters in the fast fading channels. Based on orthogonal space-time coding and the F- 2 norm of received signal vector, a non coherent antenna selection algorithm, which does not require to estimate channel parameters, is presented in this paper. Performance analysis and simulation results show that in case of high signal noise ratio, the non-coherent antenna selective algorithm can achieve the same diversity gain as full complexity system.