空域滤波器组对雷达阵列合成距离像的影响分析

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空域滤波器组对雷达阵列合成距离像的影响分析

魏麟¹, 彭卫^2,3, 彭卫东¹, 陈客松²

1. 中国民航飞行学院航空工程学院, 四川广汉 618307;
2. 电子科技大学电子工程学院, 四川成都 610054;
3. 四川农业大学商学院, 四川成都 611830

收稿日期:2012-03-07 修回日期:2012-04-05 出版日期:2012-08-25 发布日期:2012-08-23
通讯作者: 彭卫 E-mail:pw7@163.com
基金资助:
国家自然科学基金(60702070);民航科技基金(MHRD201022)

Impact Analysis of Synthetic Range Profile on Radar Array Using Spatial Filter Bank

WEI Lin¹, PENG Wei^2,3, PENG Weidong¹, CHEN Kesong²

1. Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan 618307, China;
2. School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China;
3. School of Business, Sichuan Agricultural University, Chengdu 611830, China

Received:2012-03-07 Revised:2012-04-05 Online:2012-08-25 Published:2012-08-23
Supported by:
National Natural Science Foundation of China (60702070);Science Foundation of CAAC (MHRD201022)

摘要/Abstract

摘要： 为了简化雷达系统硬件设计和降低成本,可以使用多个窄带成分来合成宽带信号,从而获得满足实际需要的合成距离像。针对合成宽带信号和雷达阵列的特点,详细分析了结合合成宽带信号及传统空域滤波器组情况下所合成距离像的失真原因,指出合成距离像的失真由形状变形和位置平移两部分组成,且这两种失真分别由各个空域滤波器输出幅度和相位的波动所引起。同时,推导出计算对应相位和幅度失真度的理论公式,并由此给出了当合成距离像存在可接受失真时阵列的临界条件。计算机数值仿真结果验证了以上结论。

关键词: 雷达成像, 阵列, 合成距离像, 子带, 空域滤波器组

Abstract: In order to reduce the complexity of radar system’s hardware design and keep costs down, a wideband signal can be synthesized by combining several individual narrow band components and then a synthetic range profile meeting the actual needs can be acquired. Combining with the characteristics of the synthetic wideband signal and radar array respectively, this paper analyzes the reason for the distortion of a synthetic range profile formed with combination of the synthetic wideband waveform and traditional spatial filter bank in detail, and points out that the distortion consists of two parts including range shift and shape deform, which are caused by the amplitude and phase fluctuation among each subband’s spatial filter output, respectively. Meanwhile some corresponding theoretical formulas are put out and thus the array’s critical conditions of element number obtaining acceptable distortion of synthetic range profile also are deduced. The above conclusions are testified by some numerical simulation tests.

Key words: radar imaging, array, synthetic range profile, subband, spatial filter bank

中图分类号:

魏麟, 彭卫, 彭卫东, 陈客松. 空域滤波器组对雷达阵列合成距离像的影响分析[J]. 航空学报, 2012, 33(8): 1508-1514.

WEI Lin, PENG Wei, PENG Weidong, CHEN Kesong. Impact Analysis of Synthetic Range Profile on Radar Array Using Spatial Filter Bank[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(8): 1508-1514.

参考文献

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

空域滤波器组对雷达阵列合成距离像的影响分析

Impact Analysis of Synthetic Range Profile on Radar Array Using Spatial Filter Bank

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