分集路径相关时MIMO雷达的检测性能

针对分布式MIMO雷达分集路径相关时对检测性能影响问题，基于有限散射点目标模型，在Neyman-Pearson准则下研究了分集路径相关时分布式MIMO雷达检测方法和性能；该检测器的充分统计量服从加权卡方分布，推导得到了检测概率与虚警概率的近似解析表达式；数值仿真表明：分集路径相关会降低分布式MIMO的空间分集能力，在高信噪比时，MIMO雷达的检测性能随着分集路径相关性的增强而恶化；而在低信噪比时分集路径相关性能够改善检测性能。

Detection Performance of MIMO Radar with Correlated Spatial Diversity Channels

We considered the effect of the correlation of the scattered signals on detection performance. Using a finite number of small scatterers model for target,the detection performance of the distributed MIMO radar was analyzed under the Neyman-Pearson criterion when the target scattering set were not strictly independent of each other.We showed that the PDF of test statistic is weighted chi-square distributed.An approximate closed form formula was derived to calculate the theoretical probability of detection for the distributed MIMO radar.Through simulation we can draw conclusion that the detection performance in high SNR deteriorates worsen with the increased of the correlation of spatial diversity channels,but the detection performance in low SNR is improved with the increased of the correlation of spatial diversity channels.