| 引用本文: | 臧维明，严少虎，薛亚运，柳青梅. 超宽带雷达频率开窗干扰抑制仿真分析[J]. 雷达科学与技术, 2017, 15(4): 415-420.[点击复制] |
| ZANG Weiming, YAN Shaohu, XUE Yayun, LIU Qingmei. Simulation Analysis of Frequency Windowing Interference Suppression for Ultra-Wideband Radar[J]. Radar Science and Technology, 2017, 15(4): 415-420.[点击复制] |
|
| 摘要: |
| 超宽带雷达因其信号频谱极宽，与调频无线电、移动通信等频段出现交叠，导致雷达接收通带内存在严重的射频干扰，影响雷达的性能。首先利用雷达方程分析了影响雷达探测覆盖能力的主要因素；然后分析雷达通带内干扰信号的特点并对其建模，之后在雷达回波信号处理环节引入陷波滤波机制实现对窄带干扰的开窗抑制；最后仿真分析了开窗抑制窄带干扰以及开窗个数对雷达探测能力的影响。仿真结果表明，对超宽带雷达进行频率开窗可有效抑制窄带干扰，但开窗个数过多时会造成雷达性能的下降，实验结果与理论分析相符。 |
| 关键词: 超宽带雷达 频率开窗 开窗干扰抑制 陷波处理 陷波滤波器 |
| DOI： |
| 分类号: |
| 基金项目:重点实验室基金项目资助(No.9140C100602150C10046) |
|
| Simulation Analysis of Frequency Windowing Interference Suppression for Ultra-Wideband Radar |
|
ZANG Weiming, YAN Shaohu, XUE Yayun, LIU Qingmei
|
|
1.The 29th Research Institute of China Electronics Technology Group Corporation;2.Suzhou NG Networks Corporation Ltd
|
| Abstract: |
| Ultra-wideband radar has a very broad frequency band and therefore overlaps with other radio service frequency bands including FM radio, mobile communications, etc. This causes serious interference inside the radar receiver and affects the radar performance. In this paper, we firstly analyze the influence factors of radar coverage ability using radar equation. And then analyze the characteristics of the in-band interfering signals and model it. After that the notch filtering mechanism is introduced to filter the narrowband interference in the ultra-wideband frequency range, which is named “windowing” and suppresses interference effectively. At last, by means of numerical simulation we analyze the influence of frequency window on radar coverage ability as well as the influence of window quantity on radar performance. The simulation results show that “windowing” for ultra-wideband radar frequency can effectively suppress narrowband interference, however, too more windows will decrease the radar performance. The experimental results are in conformity with theoretical analysis. |
| Key words: ultra-wideband radar frequency windowing windowing interference suppression notch processing notch filter |
