| 基于FrFT的跳频通信LFM干扰抑制算法 |
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| 引用本文： | 顾俊义,蒋强,钱博. 基于FrFT的跳频通信LFM干扰抑制算法[J]. 火力与指挥控制, 2017, 42(9). DOI: 10.3969/j.issn.1002-0640.2017.09.013 |
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| 作者姓名： | 顾俊义 蒋强 钱博 |
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| 作者单位： | 沈阳理工大学通信与网络工程中心,沈阳,110159 |
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| 基金项目： | 国家自然科学基金，辽宁省教育厅基金，沈阳理工大学辽宁省信息网络与信息对抗技术重点实验室开放基金 |
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| 摘 要： | 为解决跳频通信过程中LFM干扰信号抑制问题,提出一种基于Fr FT的LFM干扰抑制算法,利用Fr FT时频面坐标轴旋转性质,通过计算信号的不同阶次Fr FT并搜索其峰值,确定信号最优Fr FT阶次,完成对LFM干扰信号的判别,进一步采用频域陷波实现对LFM干扰信号的抑制。仿真结果表明,该算法能有效抑制跳频信号中的LFM干扰信号,提高信号的最小均方误差。
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| 关 键 词： | FrFT 跳频 LFM 干扰抑制 |
LFM Interference Suppression Algorithm Based FrFT in Frequency Hopping Communication |
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| GU Jun-yi,JIANG Qiang,QIAN Bo. LFM Interference Suppression Algorithm Based FrFT in Frequency Hopping Communication[J]. Fire Control & Command Control, 2017, 42(9). DOI: 10.3969/j.issn.1002-0640.2017.09.013 |
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| Authors: | GU Jun-yi JIANG Qiang QIAN Bo |
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| Abstract: | In order to solve LFM interference signal suppression in Frequency hopping communication, an LFM interference suppression algorithm based FrFT, which uses the time-frequency axis rotation properties of FrFT is proposed to calculate the different FrFT orders of signal, then by searching the peaks to determine the optimal FrFT order of signal, distinguish out LFM interference signal. Furthermore, using the frequency domain notch realize the LFM interference suppression. Simulation results show that the algorithm can effectively inhibit LFM interference and improve the MMSE in frequency hopping signals. |
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| Keywords: | FrFT frequency hopping LFM interference suppression |
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