飞机尾流雷达探测的时-频-空域联合处理

应用科学学报 ›› 2009, Vol. 27 ›› Issue (2): 150-155.

飞机尾流雷达探测的时-频-空域联合处理

李军王雪松刘义王涛

国防科技大学电子科学与工程学院，长沙410073

收稿日期:2008-09-18 修回日期:2009-02-16 出版日期:2009-04-01 发布日期:2009-04-01
作者简介:李军，博士生，研究方向：飞机尾流电磁散射特性及其雷达探测技术，E-mail：junliseu@gmail.com；王雪松，博士，教授，博导，研究方向：新体制雷达探测、雷达极化信息处理、雷达电子战建模与仿真等，E-mail：wxs1019@vip.sina.com
基金资助:
武器装备探索研究(No.7130620)资助项目

Time-Frequency-Space Domain Processing for Radar Detection of Aircraft Wake Vortices

School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China

Received:2008-09-18 Revised:2009-02-16 Online:2009-04-01 Published:2009-04-01

摘要/Abstract

摘要：

针对相参多普勒雷达，提出了一种表征飞机尾流时-频-空域特性的雷达回波信号模型. 导出了飞机尾流最佳似然比检测器及其在大脉冲数、小信噪比条件下的准最佳形式，证明了后者为时-频-空域联合处理结构，并具有不依赖于信号功率的恒虚警特性. 导出了准最佳检测器检测概率和虚警概率的解析表达式及其近似形式. 实验结果表明，时-频-空域联合处理技术可有效增强飞机尾流的雷达探测性能.

关键词: 飞机尾流, 雷达检测, 时-频-空域处理, 恒虚警率

Abstract:

In this paper, a signal model representing the time-frequency-space domain characteristics of aircraft wake vortices is established for coherent Doppler radar. The optimal likelihood ratio detector for detection of aircraft
wake vortices and its quasi-optimal form for large number of pulses and low signal-to-noise ratio (SNR) are derived. The quasi-optimal form is shown to possess the structure of time-frequency-space domain processing and constant false alarm rate (CFAR) property independent of the signal power. Analytical expressions and their approximations for probabilities of detection and false alarm are derived for the quasi-optimal detector. The results indicate that the radar performance of detecting aircraft wake vortices can be effectively improved by using time-frequency-space domain processing.

Key words: aircraft wake vortex, radar detection, time-frequency-space domain processing, constant false alarm rate

中图分类号:

TN957.51

李军王雪松刘义王涛. 飞机尾流雷达探测的时-频-空域联合处理[J]. 应用科学学报, 2009, 27(2): 150-155.

LI Jun, WANG Xue-song, LIU Yi, WANG Tao. Time-Frequency-Space Domain Processing for Radar Detection of Aircraft Wake Vortices[J]. Journal of Applied Sciences, 2009, 27(2): 150-155.