| 基于脉内LFM-Costas频率步进的抗间歇采样干扰方法 |
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| 引用本文： | 张建中,穆贺强,文树梁,廖胜男,沙明辉.基于脉内LFM-Costas频率步进的抗间歇采样干扰方法[J].系统工程与电子技术,2019,41(10):2170-2177. |
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| 作者姓名： | 张建中 穆贺强 文树梁 廖胜男 沙明辉 |
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| 作者单位： | 1. 北京无线电测量研究所, 北京 100854; 2. 中国航天科工集团第二研究院, 北京 100854 |
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| 摘 要： | 线性调频(linear frequency modulation,LFM)分段脉压对抗间歇采样干扰时,子脉冲顺序步进,使得采样子脉冲与相邻子脉冲脉压后,残余信号积累从而形成干扰带;干扰抑制时信号不连续采样,产生谐波分量。针对这两个问题,提出一种基于脉内Costas频率步进的LFM波形抗间歇采样干扰方法。该波形综合LFM和Costas编码的优点,具有理想图钉型的模糊函数,不仅可以抑制干扰带,还可以大大降低谐波分量,最终提高抗干扰性能。理论推导和仿真分析验证了该方法的有效性。
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| 关 键 词： | 间歇采样 分段脉压 抗干扰方法 频率步进 COSTAS编码 |
Anti-intermittent sampling jamming method based on intra-pulse LFM-Costas frequency stepping |
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| ZHANG Jianzhong,MU Heqiang,WEN Shuliang,LIAO Shengnan,SHA Minghui.Anti-intermittent sampling jamming method based on intra-pulse LFM-Costas frequency stepping[J].System Engineering and Electronics,2019,41(10):2170-2177. |
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| Authors: | ZHANG Jianzhong MU Heqiang WEN Shuliang LIAO Shengnan SHA Minghui |
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| Affiliation: | 1. Beijing Institute of Radio Measurement, Beijing 100854, China; 2. The Second Academy of China Aerospace Science and Industry Corporation Limited, Beijing 100854, China |
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| Abstract: | When linear frequency modulation (LFM) segmented pulse compression used to oppose the intermittent sampling jamming, the sub-pulses are sequentially stepped. After the sampling sub-pulses and the adjacent sub-pulses compress, the residual signals accumulate to form an interference band. When suppressing and interfering signals to sample continuously, harmonic components are produced. Aiming at these two problems, an anti-intermittent sampling method based on intra-pulse Costas frequency stepping LFM waveform is proposed. The waveform combines the advantages of LFM and Costas-coding, has an ideal ambiguity function of pin type. It can not only suppress the interference band, but also greatly reduce the harmonic components, ultimately improve the anti-jamming performance. The validity of the method is verified by theoretical deduction and simulation analysis. |
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| Keywords: | intermittent sampling segmented pulse compression anti-jamming method frequency stepped Costas-coding |
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