| 引用本文: | 杨 贤，张华冲，李 华. 高频雷达射频干扰抑制的自适应接收滤波设计[J]. 雷达科学与技术, 2024, 22(1): 63-68.[点击复制] |
| YANG Xian, ZHANG Huachong, LI Hua. Adaptive Design of Receiving Filter for Radio Frequency Interference Suppression in High⁃Frequency Radar[J]. Radar Science and Technology, 2024, 22(1): 63-68.[点击复制] |
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| 摘要: |
| 为抑制高频雷达中的射频干扰，本文提出了一种自适应滤波器设计方法。首先，基于海杂波和射频干扰的多普勒特性，设计了海杂波区域自适应检测算法，以有效地估计射频干扰特性。然后，对海杂波、噪声和射频干扰的功率谱进行分析，并采用连续均值剔除算法，以检测射频干扰是否存在及其频率范围。最后，引入基于相似度约束的接收滤波器算法，根据射频干扰频带自动计算约束参数，从而实现了接收滤波器的自适应设计，以稳健地抑制射频干扰。仿真结果表明，相比传统白化滤波器，本文所设计滤波器可以有效地抑制宽带和窄带射频干扰，提高雷达抗干扰能力。 |
| 关键词: 高频雷达 射频干扰 接收滤波器 连续均值剔除算法 |
| DOI：DOI:10.3969/j.issn.1672-2337.2024.01.009 |
| 分类号:TN958.93 |
| 基金项目:国家自然科学基金（No.61701067）；重庆市教委科学技术研究项目（No.KJQN202300633） |
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| Adaptive Design of Receiving Filter for Radio Frequency Interference Suppression in High⁃Frequency Radar |
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YANG Xian, ZHANG Huachong, LI Hua
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1. The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China;2. Chongqing University of Posts and Telecommunications, Chongqing 400065, China
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| Abstract: |
| In order to suppress the radio frequency interference （RFI） in high?frequency （HF） radar, an adaptive filter design method is proposed in this paper. Firstly, based on the Doppler characteristics of sea clutter and RFI, an adaptive detection algorithm for sea clutter region is designed to estimate the RFI characteristics effectively. Then, based on the power spectral analysis of sea clutter, noise and RFI, a consecutive mean excision algorithm is employed to detect the presence of RFI and its frequency range. Finally, a similarity constraint based receive filter algorithm is used to automatically calculate the constraint parameters according to the RFI frequency band, so as to adaptively design the receive filter to achieve robust suppression of RFI. Simulation results show that, compared with the traditional whitening filter, the proposed filter can effectively suppress both broadband and narrowband RFIs and improve radars’ anti?interference capability. |
| Key words: high⁃frequency radar radio frequency interference receive filter consecutive mean excision algorithm |
