部分均匀海杂波中雷达目标的平滑自适应检测  

Smooth adaptive detector for radar target in partially homogeneous sea clutter environment

作　　者：时艳玲[1] 林毓峰 宛汀[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《系统工程与电子技术》2016年第12期2745-2751,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(61201325);江苏省留学基金(JS-2014-080);江苏省自然科学基金(BK20140893)资助课题

摘　　要：在部分均匀海杂波环境下,海杂波的瞬时功率波动起伏较大,导致海面目标检测的性能受到影响。为了减小此影响,引入一个平滑因子以实现对杂波功率的控制,提出了平滑-广义似然比检测器(smooth-generalized likelihood ratio test,S-GLRT)。通过推导S-GLRT的虚警概率表达式,表明其相对于杂波纹理分量的尺度参数具有恒虚警特性。在不增加计算复杂度的前提下,实验结果表明,在部分均匀的海杂波背景下,S-GLRT优于GLRT。In partially homogeneous sea clutter environment, the instantaneous power of sea clutter fluctu- ates sharply, which affects the performance of the detecting target in sea clutter. In order to reduce the influ- ence, a smooth factor is used to control the clutter power, and the smooth generalized likelihood ratio test （S-GLRT） is proposed. The analytic expression of probability of false alarm is derived to verify the constant false alarm ratio with respect to the scale parameter of texture. Without an additional computational complexi- ty, experimental results show that the S-GLRT outperforms the GLRT in the partially homogeneous sea clutter environment.

关 键 词：自适应检测器 部分均匀海杂波 平滑因子 逆伽马分布 

分 类 号：TN911.23[电子电信—通信与信息系统]