摘要
雷达信号的脉冲重复周期是侦察机系统识别辐射源的重要参数之一,指出了普遍使用的"同步法"在计算重复周期过程中出现的问题,对处理复杂电子信号环境时经常出现"倍周期"现象给出了合理解释.提出一种新的重频计算算法——折线重频算法,该算法的基本思想是在多个辐射源的脉冲序列中任意选定一个中点附近的脉冲P,以P为中心点折叠,那么包含P脉冲的辐射源的脉冲,将以P为对称点前后脉冲点重合,但其他辐射源的脉冲之间不会重合,所以包含P脉冲的辐射源能够分离.实验结果表明该算法在几十个辐射源的复杂信号环境中以较高概率正确计算出每个辐射源的重复周期,明显优于"同步法".
Estimating pulse repetition intervals （PRI） is important to identify different radiant origins in scouting systems. This paper introduced the researching status of this problem, and analyzed the weakness of the synchronization algorithm used widely. A new folding algorithm for estimating pulse repletion intervals is pres- ented, that is to select a pulse point P at about the midpoint of the pulse train （ of course ： the train consist of several independent radar signals with different PRIs. ）as the folding focus, the pulse points containing P will superpose, while use the point P as the center, other pulse points in the train will not superpose, so the points including pulse P can be separated from the train. We can identify all the radiant origins in the train deduced by analogy. Experimental results indicated that, the algorithm can compute each PRIs in complicated electro- signal environment consisting of multi-radiant origins, which out performs the synchronization algorithm.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第11期1761-1763,共3页
Journal of Harbin Institute of Technology
关键词
雷达信号
脉冲重复周期
信号识别
折叠方法
radar signal
pulse repetition interval
signal distinguish
folding method
