摘要
针对传统雷达信号检测方法对相控阵雷达信号检测概率较低的问题,提出了一种结合小波降噪和极值序列法的信号检测方法。该方法采用小波阈值降噪法对雷达信号进行预处理,以提高侦收信号的信噪比,利用极值序列法在高信噪比下检测精度较高的优势,完成对信号的准确检测和参数的精确估计。仿真结果表明,与传统检测方法相比,该方法在低信噪比下对相控阵雷达信号的检测概率平均提高21.8%。
Aiming at a lower detective probability of the existing radar signal detection method to phased-array radar signal,this paper presents a detection method based on wavelet de-noising and extremum sequence algorithm. The method wavelet threshold de-noising algorithm to pretreat the received signal at first,which can ameliorate the SNR （ Signal Noise Ratio） of signal. Then it uses extremum sequence algorithm to detect the radar signal accurately and estimate its parameters accurately,which has a higher detection precision in a higher SNR. Simulation results show that compared with the existing method,the proposed one has 21. 8% improvement in detective probability to phased-array radar signal in a low SNR.
出处
《吉林大学学报（信息科学版）》
CAS
2010年第5期445-452,共8页
Journal of Jilin University（Information Science Edition）
关键词
雷达信号检测
极值序列法
小波降噪
检测概率
radar signal detection
extremum sequence algorithm
wavelet de-noising
detective probability
