摘要
为了解决传统的CDIF分选门限设置容易造成较高的虚警概率的问题,本文提出一种改进的基于噪声门限的门限设置方法。该方法首先构建随机混叠辐射源脉冲的到达时间概率分布模型,并基于该模型推导出所有脉冲之间的时差都必须满足的最低统计频次,将这个最低的统计频次作为噪声门限以降低虚警概率。仿真分析表明,改进门限CDIF方法在辐射源数目较多,存在脉冲丢失严重和干扰脉冲的情况下,对虚警具有很好的抑制作用,同时对于固定,参差和小抖动雷达信号可以保持良好的分选效果。
In order to solve the problem of high false alarm probability caused by traditional CDIF sorting threshold setting,this paper proposes an improved threshold setting method based on noise threshold.The method first constructs the probability distribution model of time of arrival of random aliased emitter pul-ses,and derives the minimum statistical frequency that must be met by the time difference between all pulses based on the model.This minimum statistical frequency is used as the noise threshold to reduce the false alarm probability.The simulation analysis shows that the improved threshold CDIF method has a good effect on false alarm suppression when there are many emitters,serious pulse loss and interference pulses,and can maintain a good sorting effect for fixed,stagger and small jitter radar signals.
作者
陈鸿杰
李利民
邓志安
司伟建
芦阳
CHEN Hong-jie;LI Li-min;DENG Zhi-an;SI Wei-jian;LU Yang(Harbin Engineering University,Harbin 150001,China;China Institute of Electronic Science,Beijing 100041,China;Key Laboratory of Advanced Marine Communication and Information Technology,Ministry of Industry and Information Technology,Harbin 150001,China)
出处
《中国电子科学研究院学报》
北大核心
2022年第11期1094-1101,1118,共9页
Journal of China Academy of Electronics and Information Technology
基金
国家自然科学基金(61971155)
中央高校基本科研业务费项目(3072022TS0802)。
关键词
CDIF直方图
信号分选
门限设置
虚警概率
CDIF histogram
signal sorting
threshold setting
false alarm probability
