MIMO系统的非相干天线选择算法
Noncoherent Antenna Selection Algorithem for MIMO System
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摘要: 该文提出了多天线传输系统的非相干天线选择(NON-AS)算法，将广义似然比检验(GLRT)与天线选择结合应用于U码传输系统，天线选择和信号检测无需信道状态信息。与相干检测的天线选择相比，NON-AS算法不需要估计信道，大大降低了系统复杂性。该文只考虑了接收天线选择，天线选择的准则是基于每个天线接收到的信号向量F-2范数。仿真结果表明，在高信噪比条件下，选择有最大范数的接收天线子集，系统能实现和使用全部接收天线的U码传输系统渐近相同的分集增益。Abstract: This paper presents a NON-coherent Antenna Selection (NON-AS) algorithm for multi-antenna transmission system. The combination of Generalized Likelihood Ratio Test (GLRT) and Antenna Selection (AS) is applied to Unitary (U)signal transmission system, and antenna selection and signal detection do not require Channel State Information (CSI). Therefore, the NON-AS algorithm, compared with coherent antenna selection, can greatly reduce system complexity. This paper only discusses the selection of receiving antenna. Selection criterion is based on the Frobenius-2 norm of received signal vector at each receiving antenna. Simulation results indicate that under the condition of high Signal to Noise Ratio (SNR), by selecting a set of receiving antennas which observe the largest Frobenius-2 norm of received signal vector, the same diversity gain as the one obtained by using all the receiving antennas can be achieved.
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