相参辐射源信号频谱图像分选方法

One Signal Sorting Method Based on Coherent Emitter Signal Spectrum Image

增加新的特征参数，是提高雷达辐射源信号分选识别率的有效手段。相参是新体制雷达辐射源的重要特性，在现有特征参数的基础上，增加相参特征用于信号分选，对降低当前信号分选“漏批”率极具价值。文章在深入分析新体制雷达辐射源相参特征的基础上，对侦察到的脉冲流进行了信号重构，利用频谱分析的方法，提取了重构信号的频谱主峰图像，并提出了基于图像点迹累加比的相参特征参数。理论分析与仿真实验均表明，重构信号的频谱主峰图像就是相参特征的表现形式之一，将点迹累加比这一特征参数用于雷达信号分选，能够有效地降低分选过程中的“漏批”问题。

To add new characteristic parameter to signal sorting can increase sorting recognition rate of radar emitter signal. Coherent is an important characteristic of the new system radar, on the basis of existing characteristic parameter, to add new characteristic parameter to signal sorting is extremely valuable to reduce the probability of leak-alarm. This paper analyzes the coherent characteristic of new system radar emitters, reconstructs the signal of the detected pulse flow, extracts the spectrum peak image of the reconstruct signal by the way of spectrum, and introduces a coherent characteristic parameter based on image Spot-Summation-Ratio. Theoretical analysis and simulation both indicate that the spectrum peak image of the reconstruct signal is one of the manifestations of coherent characteristics, to use the coherent characteristic parameter to signal sorting can reduce the probability of leak-alarm.