摘要
本文提出了基于二分法的STFT算法对宽带雷达信号进行检测。首先,对STFT方法中窗函数的选择和窗口滑动步长等关键环节进行了仿真对比分析。然后,提出了基于二分法的STFT算法,确定信号起始时刻所处数据段,并对信号起始时刻进一步测量,提高检测精度。最后,采用二分法STFT算法对带宽200MHz的宽带LFM信号进行仿真分析,检测时间精度可以达到62.5ns。该算法综合考虑了计算量与检测精度要求,可对宽带雷达信号进行快速精确检测。
The dichotomy-STFT algorithm is used to detect the radar broadband signal. Firstly, the key links of window function selection and window sliding step in STFT method are compared and analyzed. Then, the STFT algorithm based on dichotomy is proposed, and the data segment of the signal start time is determined in this paper. Through the dichotomy-STFT algorithm, the signal start time is further measured, and the detection accuracy is improved. Finally, the dichotomy-STFT algorithm is used to simulate and analyze the broadband LFM signal with 200 MHz bandwidth, and the detection time accuracy can reach 62.5 ns. The dichotomy-STFT algorithm takes into account the requirements of calculation and detection accuracy, and the wideband radar signal can be detected quickly and accurately.
作者
王海军
聂孝亮
刘海业
王岩
Wang Haijun;Nie Xiaoliang;Liu Haiye;Wang Yan(Luoyang Electronic Equipment Test Center of China, Luoyang 471003, China)
出处
《航空兵器》
CSCD
北大核心
2019年第3期33-39,共7页
Aero Weaponry
基金
国家自然科学基金项目(61490690)
关键词
STFT算法
二分法
窗函数
信号检测
宽带雷达信号
电子战
STFT algorithm
dichotomy
window function
signal detection
radar broadband signal
electronic warfare