三种频率步进雷达波形模糊函数比对分析

Comparison Analysis of Waveform Ambiguity Function of Three Stepped Frequency Radars

频率步进雷达波形是一种重要的高分辨率雷达波形,它是通过相参脉冲串的各个载频的线性跳变获得大的累积带宽,从而获得目标高分辨率的一维距离像。在此基础上对步进频脉冲内部进行不同调制,其雷达的性能也会发生变化。从信号波形模糊函数的角度,对常规频率步进波形、频率步进线性调频波形以及频域欠采样线性调频波形等3种典型频率步进雷达波形进行了仿真分析并得出了结论,该结论对雷达系统设计具有重要参考价值。

Stepped frequency radar wavefrom is an important radar wavefrom with high resolution.It obtains a large cumulative bandwidth by linear hopping of each carrier frequency of coherent pulse string,and obtains a high resolution one-dimensional range image of the target.Based on this,the radar performance will be changed by different modulations of the stepped frequency pulse string.From the perspective of signal waveform ambiguity function,the simulation analysis of three typical stepped frequency radars wavefroms,such as conventional stepped frequency wavefrom,stepped frequency-linear frequency modulation(LFM)wavefrom and frequency domain under-sampling LFM wavefrom,are carried out and the conclusion are drawn.The conclusion which has important reference value for radar system design.