| 引用本文: | 陈飞强,刘哲,黄龙,等.卫星导航接收机中快扫频干扰低复杂度抑制方法.[J].国防科技大学学报,2023,45(5):105-110.[点击复制] |
| CHEN Feiqiang,LIU Zhe,HUANG Long,et al.Low-complexity fast frequency-sweep interference mitigation method for satellite navigation receivers[J].Journal of National University of Defense Technology,2023,45(5):105-110[点击复制] |
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| 卫星导航接收机中快扫频干扰低复杂度抑制方法 |
| 陈飞强,刘哲,黄龙,鲁祖坤 |
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(国防科技大学 电子科学学院, 湖南 长沙 410073)
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| 摘要: |
| 针对卫星导航接收机中的快扫频干扰抑制问题,提出了一种基于脉冲置零的低复杂度干扰抑制方法,与传统基于时频分析的干扰抑制方法不同,该方法通过低通滤波将时域上连续的快扫频干扰转变为脉冲干扰,并通过脉冲检测与置零对干扰进行抑制。当快扫频干扰处于低通滤波器带内时,被当作脉冲干扰置零；当快扫频干扰处于低通滤波器带外时,被当成带外干扰滤除。理论分析与实验结果表明,该方法相对传统方法的运算复杂度降低了一个数量级,并且能得到与传统方法相近的干扰抑制效果。 |
| 关键词: 卫星导航 扫频干扰 干扰抑制 时频分析 脉冲置零 |
| DOI：10.11887/j.cn.202305012 |
| 投稿日期：2022-07-12 |
| 基金项目:国家自然科学基金资助项目(62003354) |
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| Low-complexity fast frequency-sweep interference mitigation method for satellite navigation receivers |
| CHEN Feiqiang, LIU Zhe, HUANG Long, LU Zukun |
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(College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| A low-complexity method based on pulse blanking for fast frequency-sweep interference mitigation in satellite navigation receivers was proposed. Different from traditional methods based on time-frequency analysis, this method converted the continuous wave interference into pulse interference through a low-pass filter, and then pulse detection and blanking were used to mitigate the interference. The interference was blanked as a pulse when it located in the pass-band of the low-pass filter. Otherwise, it was suppressed as an out-band interference when it located in the stop-band of the low-pass filter. Theoretical analysis and experimental results show that the computation complexity of this method is reduced by an order of magnitude compared with that of traditional method, and it can achieve similar interference suppression performance. |
| Keywords: satellite navigation frequency-sweep interference interference mitigation time-frequency analysis pulse blanking |
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