基于双门限时域相关的雷达信号动态检测技术研究  

Research on Radar Signal Dynamic Detection Technology Based on Double Threshold Time Domain Correlation

作　　者：刘方建 刘倩[1] 刘腾飞 孙中森 郑宇 LIU Fangjian;LIU Qian;LIU Tengfei;SUN Zhongsen;ZHENG Yu(School of Electronic Information,Qingdao University,Qingdao 266071,China)

机构地区：[1]青岛大学电子信息学院,山东青岛266071

出　　处：《电子信息对抗技术》2023年第3期39-45,共7页Electronic Information Warfare Technology

基　　金：国家重点研发计划战略性国际科技创新合作重点专项(2018YFE0206500)

摘　　要：针对高脉冲流密度条件下的雷达脉冲检测,存在漏警率高、时间特征捕获不准确的问题,提出了一种相关差值的雷达信号检测方法。该方法利用时域相关原理,提升了脉冲包络识别度,将基于隔点差值方法的极值统计作为双门限设定依据,实现了工程中低信噪比条件下随机雷达信号的动态检测。通过该方法对三种不同脉内调制信号进行了仿真,分析了不同信噪比下时域参数仿真结果,同时完成了硬件测试验证。结果表明,该脉冲检测法在5 dB的全频段信噪比、高脉冲流密度环境下可实现信号脉宽测量误差小于2%。Aiming at the problems of high missed alarm rate and inaccurate time feature acquisition in radar pulse detection under high pulse current density,a radar signal detection method based on correlation difference is proposed.The time domain correlation principle is used to improve the pulse envelope recognition.The extreme value statistics based on the interval difference method is used as the basis for setting the double threshold.The dynamic detection of random radar signal under the condition of low signal-to-noise ratio in the project is realized.Three different intra pulse modulation signals are simulated by this method.The simulation results of time-domain parameters under different signal-to-noise ratios are analyzed.The hardware test is completed.The results show that the pulse detection method can achieve a signal pulse width measurement error of less than 2%in the environment of 5 dB full band signal-to-noise ratio and high pulse current density.

关 键 词：脉内调制信号 脉冲检测 时域相关 低信噪比 双门限 

分 类 号：TN971.1[电子电信—信号与信息处理]