雷达信号瞬时频率曲线计算与分析方法研究

Research on Calculation and Analysis Method for Instantaneous Frequency Curve of Radar Signal

随着雷达技术的快速发展,具有调制的复杂雷达信号逐渐增多,对雷达信号的调制特征进行分析变得越来越重要。复杂雷达信号调制类型分析的重要方法之一是瞬时频率曲线分析,瞬时频率曲线分析两个重要问题是瞬时频率曲线的估计和瞬时频率曲线分段。提出采用扩展Prony算法和Douglas-Peucker压缩算法结合,解决瞬时频率曲线估计和分段的问题,可以快速准确估计瞬时频率曲线,并找到恰当的曲线拐点,取得良好分析效果。

With the rapid development of radar technology,the number of complex radar signals with modulation is gradually increasing,and analyzing the modulation characteristics of radar signals has become increasingly important.One of the important methods for analyzing the modulation types of complex radar signals is the analysis of instantaneous frequency curves.The two important issues in instantaneous frequency curve analysis are the estimation of the instantaneous frequency curve and the segmentation of the instantaneous frequency curve.Using a combination of extended Prony algorithm and Douglas Pucker compression algorithm to solve the problem of instantaneous frequency curve estimation and segmentation is proposed.The instantaneous frequency curve can be estimated quickly and accurately.The appropriate curve inflection points are found,and good analysis results are achieved.