一种适用于雷达侦测的UWB-SOSCA算法  

A UWB-SOSCA Algorithm for Radar Detection

作　　者：魏本杰 丁元博 WEI Benjie;DING Yuanbo(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《电讯技术》2024年第6期902-909,共8页Telecommunication Engineering

基　　金：中国科学院“一三五”重点培育基金(Y52115A985)。

摘　　要：针对宽带雷达检测门限值设置难度大、系统复杂度高、实时性差等问题,提出了一种UWB-SOSCA(Ultra-Wide Band-Smallest of Ordered Statistics and Cell Average)检测算法。该算法主要包括多相滤波、SOSCA恒虚警检测和二元积累。其中,多相滤波将宽带信号划分为多个子信道,降低通道速率;SOSCA恒虚警检测分别对各子信道进行自适应门限调整,提高各子信道检测概率;二元积累对各子信道的检测结果进行时域联合,优化宽带时域连续检测性能。实验结果表明,在信噪比等于7.33 dB,虚警概率为10~(-5)时,SOSCA恒虚警检测算法与传统恒虚警算法相比,检测概率可提升14%;当多相滤波输入信噪比为-5 dB时,UWB-SOSCA算法的宽带线性调频信号脉冲宽度测量偏差优于6.5 ns。该算法具有大监视带宽、大动态范围和高检测概率,可广泛应用于侦察接收机的雷达侦测工作。To solve the problems such as difficulty in setting the detection threshold of wideband radar,high complexity and poor real-time performance,an Ultra-Wide Band-Smallest of Ordered Statistics and Cell Average(UWB-SOSCA)detection algorithm is proposed.The algorithm mainly includes polyphase filtering,SOSCA constant false alarm rate(CFAR)detection,and binary accumulation.Among them,polyphase filtering divides the broadband signal into multiple subchannels to reduce the channel rate;SOSCA CFAR detection adjusts the adaptive threshold for each subchannel separately to improve the detection probability of each subchannel;binary accumulation combines the detection results of each subchannel in the time domain to optimize the broadband continuous detection performance.The experimental results show that the detection probability of the SOSCA CFAR detection algorithm can be improved by 14%compared with that of the traditional CFAR algorithm when the signal-to-noise ratio(SNR)is equal to 7.33 dB and the false alarm probability is 10-5;the deviation of the pulse width measurement of the broadband linear FM signal of the UWB-SOSCA algorithm is better than 6.5 ns when the SNR of the polyphase filtering input is-5 dB.The algorithm has large monitoring bandwidth,large dynamic range,and high detection probability,which can be widely used in the radar detection of reconnaissance receivers.

关 键 词：宽带雷达 信号检测 恒虚警算法 多相滤波 二元积累 

分 类 号：TN951[电子电信—信号与信息处理]