摘要 在球不变随机向量(SIRV,Spherically Invariant Random Vector)的非高斯杂波背景下,提出了一种新的距离扩展目标检测器.给出了检测参数的简易确定方法,推导了虚警概率与检测阈值的解析表达式,证明了所提检测器的恒虚警率特性.仿真实验表明,在参数设置合理情况下,所提出的检测器性能远好于已有的两种距离扩展目标检测器.另外,随着阵元数、目标散射点个数及杂波尖峰的增加,检测器的性能得到提高;且该检测器对第三门限的选取和不同的杂波相关性均具有很好的鲁棒性.
Abstract：In additive non-Gaussian clutter modeled as a spherically invariant random vector (SIRV),a novel detector is designed for range-spread target.Moreover,the parameters for this detector are derived simply.The formulas relating the false alarm probability to the detection thresholds are also deduced,which show the constant false alarm rate (CFAR) properties.The experimental results show that,with proper parameters,the proposed detector performs much better than two existing range-spread target detectors.It is shown that as the number of sensors,the number of target scatterers or the clutter spikiness increases,its performance improves.In addition,the dirived detector is robust to the third thresholds and correlations of clutter.
2010, Vol. 38 
