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中文摘要：
针对采用球不变随机向量（SIRV）建模的非高斯杂波背景中检测具有稀疏散射点的距离扩展目标问题,先假设目标强散射点的位置信息已知,采用广义似然比检验（GLRT）理论,提出了基于散射点位置的GLRT（SL-GLRT）检测器。然后,采用门限法估计散射点的位置信息,提出了双门限恒虚警率（DT-CFAR）检测器,推导了虚警概率与检测门限关系的解析表达式,并给出门限的确定方法。与现有方法相比,散射点位置信息已知时,SL-GLRT具有最佳的检测性能,散射点位置信息未知时,DT-CFAR具有较好的鲁棒性。
英文摘要：
For the problem of detecting range-spread target with spare scatterers in non-Gaussian clutter modeled as spherically invariant random vector （ SIRV ）, it is assumed that the location information of scatterers is known and a generalized likelihood ratio test detector based on scatterers location （SL-GLRT） is proposed. Then the threshold method is used to estimate the location information of scatterers, and a two thresholds constant false alarm ratio detector （TD-CFAR） is proposed. The analytical expression relating false alarm probability to detection threshold is deduced, and a method for determining the threshold is given. The results show that the SL-GLRT has the best detection performance when the information of scatterers is known, and the DT-CFAR is more robust when it is unknown.
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