起伏目标相干检测性能分析  

Performance Analysis of Coherent Detection Technology for Fluctuating Targets

作　　者：王杰[1] 刘剑[1] 黄子芹 肖楠[1] WANG Jie;LIU Jian;HUANG Ziqin;XIAO Nan(Information and Navigation College,Air Force Engineering University,Xi’an,Shaanxi 710077,China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《信号处理》2021年第4期485-495,共11页Journal of Signal Processing

基　　金：国家自然科学基金(61871474);陕西省自然科学基础研究计划(2020JM-344);航空科学基金(201901096001);空军工程大学校长基金(XZJK2019032,XZJ2020100);空军工程大学信息与导航学院创新基金(YNLX1904020)。

摘　　要：隐身飞机等起伏目标极大降低了雷达的检测概率。传统雷达采用非相干检测,但其检测性能已不足以对抗这类起伏目标。针对上述问题,将相干检测应用于起伏目标以提高雷达检测概率。基于重积分方程,以Swerling型起伏目标为例,推导了SwerlingⅠ、Ⅲ型起伏目标相干检测的检测概率计算公式。仿真结果验证了理论推导公式的准确性,并对比非相干检测,分析了虚警概率和脉冲积累数与检测概率的关系,计算了两种检测方式对于起伏目标的起伏损失。采用相干检测,根据目标的起伏特性,选择最合适的起伏模型和脉冲积累数,可提高雷达检测概率。Fluctuating targets reduce the detection probability of radar such as stealth aircraft greatly. Traditional radar adopts non-coherent detection, but its detection performance is not good enough to counter such fluctuating targets nowadays. In response to the above problem, the coherent detection was applied to fluctuating targets to improve detection probability of radar. Swerling fluctuating target models, for example, it is derived based on multiple integral equations the detection probability formula of coherent detection for Swerling Ⅰ and Ⅲ fluctuating target models in this paper. Simulation results verified the accuracy of the theoretical derivation formula, and then compared the non-coherent detection, analyzed the relation of detection probability with false alarm probability and the number of integrated pulses, and the fluctuation loss of two detection methods for fluctuating targets is also calculated. According to the characteristics of fluctuating targets, by coherent detection, the radar detection probability will increase when select perfect fluctuating models and number of integrated pulses.

关 键 词：相干检测 检测概率 起伏目标 非相干检测 脉冲积累 

分 类 号：TN957[电子电信—信号与信息处理]