混沌调频雷达成像仿真

Chaotic FM Radar Imaging Simulation

混沌调频信号类似随机信号,具有较强的抗干扰性能(ECCM)。为了提高成像雷达的抗干扰性能,该文把混沌调频信号用于成像雷达系统,使用n-Way Bernoulli映射产生混沌序列,用该混沌序列进行频率调制得到的信号具有良好的自相关特性,不但可以获得高分辨率雷达图像,还使雷达波形难于辨识。该文分析了信号模型,对点目标进行了仿真,分析了脉冲压缩波形的旁瓣特性。结果表明,混沌调频信号用于成像雷达系统可获得比较理想的点目标图像,在成像雷达系统中有良好的应用前景。

Chaotic FM signal is similar to random signal. It has good Electronic Counter-Counter Measure （ECCM） capabilities. In this paper, chaotic FM signal is used to improve the ECCM capabilities of imaging radar. A kind of chaotic series was generated using n-Way Bernoulli map. The signals modulated by this kind of series have ideal auto-correlation property. High resolution image can be achieved using these signals. However, the waveform is very hard to estimate. In this paper, the chaotic FM signal model is discussed, and point target imaging is simulated. The simulation result shows that ideal point target image can be achieved using chaotic FM signal, which has good prospects to be applied in imaging radar system.