Journal of Systems Engineering and Electronics ›› 2013, Vol. 35 ›› Issue (3): 463-468.doi: 10.3969/j.issn.1001-506X.2013.03.02

• 电子技术 • 上一篇    下一篇

基于对角加载的自适应匹配滤波器和自适应相干估计器

刘维建1,2, 谢文冲2, 王永良2   

  1. 1. 国防科学技术大学电子科学与工程学院, 湖南 长沙 410073;
    2. 空军预警学院重点实验室, 湖北 武汉 430019
  • 出版日期:2013-03-20 发布日期:2010-01-03

AMF and ACE detectors based on diagonal loading

LIU Wei-jian1,2, XIE Wen-chong2, Wang Yong-liang2   

  1. 1. College of Electronic Science and Engineering, National University of Defense Technology, 
    Changsha 410073, China; 2. Key Lab, Air Force Early Warning Academy, Wuhan 430019, China
  • Online:2013-03-20 Published:2010-01-03

摘要:

分析了对角加载自适应匹配滤波器(diagonally loaded adaptive matched filter, DL-AMF)和对角加载自适应相干估计器(diagonally loaded adaptive coherence estimation, DL-ACE)的检测性能;推导了二者的渐近统计分布,得到了解析的虚警概率(probability of false alarm, PFA)和检测概率(probability of detection, PD)表达式。与常规AMF和ACE相比,尤其是在训练样本不足的情况下,DL-AMF和DL-ACE的检测性能大为提高,并且二者都具有渐近恒虚警(constant false alarm rate, CFAR)特性。

Abstract:

The diagonally loaded adaptive matched filter (DL-AMF) and the diagonally loaded adaptive coherence estimation (DL-ACE) are analyzed. The asymptotically statistical distributions are investigated and the analytical expression of their probabilities of false alarm (PFA’s) and probabilities of detection (PD’s) are derived. Compared with the AMF and the ACE, the PD’s of both the DL-AMF and the DL-ACE are improved dramatically, especially when the number of the secondary data is limited. In addition, they both possess the property of the asymptotically constant false alarm rate (CFAR).