| 引用本文: | 李松,魏中浩,张冰尘,洪文,黎昌硕. 一种基于混沌调频信号的稀疏雷达成像[J]. 雷达科学与技术, 2017, 15(5): 483-489.[点击复制] |
| LI Song, WEI Zhonghao, ZHANG Bingchen, HONG Wen, LI Changshuo. A Sparse Radar Imaging Method Based on Chaotic Frequency-Modulated Signal[J]. Radar Science and Technology, 2017, 15(5): 483-489.[点击复制] |
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| 摘要: |
| 稀疏雷达成像是指将稀疏信号处理理论引入雷达成像并有机结合而成的微波成像新方法。混沌调频信号是一种基于混沌映射产生的类噪声信号，与采用线性调频信号的雷达相比，它的波形之间互不相干且具有随机性，提升了雷达的隐蔽性能；其模糊函数形状为图钉形，增强了稀疏雷达成像中观测矩阵的列不相关性。利用支持分布式运算的交替方向法对稀疏场景进行重构，仿真实验表明，基于混沌调频信号的稀疏雷达成像可以在降低信号采样率的条件下对原始场景进行准确重建。 |
| 关键词: 稀疏雷达 混沌调频信号 稀疏重建 雷达成像 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(No.61571419) |
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| A Sparse Radar Imaging Method Based on Chaotic Frequency-Modulated Signal |
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LI Song, WEI Zhonghao, ZHANG Bingchen, HONG Wen, LI Changshuo
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1.(1.Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;2.National Key Laboratory of Science and Technology on Microwave Imaging, Beijing 100190, China;3.University of Chinese Academy of Sciences, Beijing 100190, China)
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| Abstract: |
| The sparse radar imaging is a new microwave imaging method which combines the sparse signal processing theory with the radar imaging. Chaotic frequency-modulated(FM) signal is a kind of noise-like signal based on chaotic mapping. Compared with the chirp signal, the waveforms of chaotic FM signal are irrelevant and random. This feature enhances radars concealment performance. The thumbtack ambiguity function enhances the column irrelevance of the observation matrix in sparse radar imaging. The sparse scene is reconstructed by using the alternating direction method of multipliers(ADMM), which supports distributed operations. The simulation results show that the chaotic FM signal based sparse radar imaging method can reconstruct the scene accurately under a lower sampling rate. |
| Key words: sparse radar chaotic FM signal sparse reconstruction radar imaging |
