混沌调频雷达成像仿真
Chaotic FM Radar Imaging Simulation
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摘要: 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。Abstract: 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.
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沈颖，刘国岁．混沌在雷达信息处理中的应用前景．南京理工大学学报, 1999, 23(4): 378381. .[2]沈颖，刘国岁．混沌相位调制雷达信号的模糊函数．电子科学学刊, 2000, 22(1): 5560. .[3]袁永斌, 徐继鳞, 等. 一种混沌雷达波形的模糊函数. 电子科学学刊, 1998, 20(5): 641647. .[4]袁永斌. 混沌信号及在雷达系统中的应用研究. [博士论文], 成都：电子科技大学，1999.[5]Wu X, Liu W, Zhao L, Fu Jeffrey. Chaotic phase code for radar pulse compression. IEEE National Radar Conference Proceedings,Atlanta, GA, 2001: 279.283.[6]Flores B C, Solis E A, et al.. Chaotic signals for wideband radar imaging. Proceedings of SPIE--The International Society for Optical Engineering. Orlando, FL, United States, 2002. Vol. 4727: 100.106.[7]张澄波. 综合孔径雷达：原理、系统分析与应用. 北京：科学出版社，1989: 第三章.[8]Axelsson S R J. Noise radar for range/doppler processing and digital beam forming using low-bit ADC[J].IEEE Trans. on Geosciences and Remote Sensing.2003, 41(12):2703- -
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