宽带相控阵雷达信号的二分推理提取算法

宽带相控阵雷达是电子对抗侦察的重点关注对象,在接收机截获的交错脉冲数据中将这一类雷达信号优先提取出来具有重要军事价值。针对接收机截获的全脉冲数据,文中提出了一种宽带相控阵雷达信号优先提取方法。该方法利用宽带相控阵雷达采用电子扫描方式的特点,分析其在同一工作模式下脉冲幅度的不变特性,引入一种生物信息学中的二分推理算法,并结合宽带信号的脉宽特性。首先,对经过脉宽阈值过滤的全脉冲数据按照脉幅大小重新排序;然后,利用二分推理算法进行脉幅突变点检测,将脉冲序列分为若干个脉幅相同的片段;最后,对每一片段进行脉冲个数阈值过滤,实现对宽带相控阵雷达脉冲的提取。仿真实验验证了方法的有效性。

A Dichotomizing Reasoning Extraction Algorithm of Wide-band Phased Array Radar Signals

Wide-band phased array radar is the primary focus of electronic warfare reconnaissance, and prior extraction of such radarsignals in the interleaved pulse data intercepted by the receiver has important military significance. Aiming at full pulse data intercepted by the receiver, a method of prior extraction of wide-band phased array radar signals is proposed in this paper. Wide-band phased array radar works by means of electronic scanning, so in the same work mode its pulse amplitude remain unchanged. Utilizing such feature, this method introduces a dichotomizing reasoning algorithm in bioinformatics, together with the pulse width characteristic of wide-band signals. Firstly, reorder the full pulse data filtrated by pulse width threshold according to pulse amplitude; then, test the discontinuity points of pulse amplitude by employing the dichotomizing reasoning algorithm, dividing the pulse sequences into segments with the same pulse amplitude; lastly, conduct pulse number threshold filtering on every segment, realizing the extraction of wide-band phased array radar signals. The validity of this method has been verified by simulation experiments.