非相干Rice杂波中的恒虚警检测

 地杂波的统计特性常常可以用Rice模型来描述,其物理基础是认为地杂波由一些大的固定散射体引起的稳定分量和大量小的随机分布的运动散射体引起的瑞利起伏分量所合成。文献2]研究了稳定分量不相干时Rice杂波中离散时间最佳检测的估值器——相关器结构,但无显式解,实现有困难。文献3]导出了Rice杂波中SwerlingⅡ目标的离散时间检测的似然比检测器结构。在此基础上,本文给出了一种修正平方律结构的似然比检测器,并和通常的平方律检测器作了性能比较。

CFAR DETECTION IN NON-COHERENT RICIAN CLUTTER

This paper provides a further study on the performance of the likelihood ratio detector of Swerling 22222 targets in Rician clutter, derived in reference 3 .Combining the likelihood ratio detector for known clutter parameters -with the estimation of the clutter parameters, an adaptive CFAR detector structure is proposed. And its performance is investigated by using the Monte Carlo simulation and analytical method. Finaty, the use of the adaptive CFAR detector to improve the performance of zero-velocity channel of MTD radar is discussed. The improved zero-velocity channel not only has little increasement of the structure complexity, but also has an approximate CFAR performance and a better detection performance in Rician clutter.