航空学报 > 2013, Vol. 34 Issue (5): 1181-1190   doi: 10.7527/S1000-6893.2013.0073

基于多载频MIMO雷达的Radon-Fourier变换盲速旁瓣抑制

钱李昌1, 许稼2, 孙文峰3, 彭应宁4   

  1. 1. 空军预警学院 研究生管理大队, 湖北 武汉 430019;
    2. 北京理工大学 信息与电子学院, 北京 100081;
    3. 空军预警学院, 空天预警实验室, 湖北 武汉 430019;
    4. 清华大学 电子工程系, 北京 100084
  • 收稿日期:2012-08-09 修回日期:2013-01-21 出版日期:2013-05-25 发布日期:2013-01-28
  • 通讯作者: 许稼 男, 博士, 教授, 博士生导师。主要研究方向: 检测与估计理论、 SAR/ISAR成像、 目标识别、 阵列信号处理等。 Tel: 010-62781375 E-mail: tigerxujia@sina.com E-mail:tigerxujia@sina.com
  • 作者简介:钱李昌 男, 博士研究生。主要研究方向: 雷达微弱目标检测与估计、 雷达成像等。 Tel: 027-85991759 E-mail: qlc009@sina.com;许稼 男, 博士, 教授, 博士生导师。主要研究方向: 检测与估计理论、 SAR/ISAR成像、 目标识别、 阵列信号处理等。 Tel: 010-62781375 E-mail: tigerxujia@sina.com
  • 基金资助:

    国家自然科学基金(61271391,61225005);北京市自然科学基金(4122038);部委基金(9140A07021012JW0101);航天创新基金(CASC201104);航天支撑基金;清华国家信息科学技术实验室(TNList)交叉基金

Blind Speed Side Lobe Suppression in Radon-Fourier Transform Based on MIMO Radar with Multi-carrier Frequency

QIAN Lichang1, XU Jia2, SUN Wenfeng3, PENG Yingning4   

  1. 1. Department of Graduate Management, Airforce Early Warning Academy, Wuhan 430019, China;
    2. School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;
    3. Air/space Early Warning Laboratory, Airforce Early Warning Academy, Wuhan 430019, China;
    4. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
  • Received:2012-08-09 Revised:2013-01-21 Online:2013-05-25 Published:2013-01-28
  • Supported by:

    National Natural Science Foundation of China (61271391, 61225005); Beijing Municipal Natural Science Foundation (4122038); China Ministry Research Foundation (9140A07021012JW0101); Aerospace Innovation Foundation (CASC201104); Aerospace Supporting Foundation; Tsinghua National Laboratory for Information Science and Technology (TNList) Cross-discipline Foundation

摘要:

长时间相干积累方法Radon-Fourier变换(RFT)中盲速旁瓣(BSSL)现象会导致雷达虚警增加、目标检测性能降低。针对BSSL问题,给出了一种基于多输入多输出(MIMO)雷达多载频设计的BSSL抑制方法。首先根据载频与BSSL分布的关系,详细推导了BSSL不交叠的约束条件;然后基于该约束条件给出了具体的载频设计公式。利用设计的载频可得到具有不交叠BSSL的两个RFT输出,通过联合处理这两个RFT输出,可实现BSSL抑制。给出了BSSL抑制性能的评价方法。理论分析和数值实验结果表明,本文算法能够在不降低RFT相干积累性能的同时,有效实现BSSL抑制。

关键词: MIMO雷达, 长时间相参积累, Radon-Fourier变换, 盲速旁瓣抑制, 载频设计

Abstract:

Blind speed side lobe (BSSL) in the long time coherent integration method of Radon-Fourier transform (RFT) can not only increase false alarm probability but also deteriorate radar detection performance. To address the BSSL problem, this paper proposes a novel BSSL suppression method based on the multi-carrier frequency design of a multiple input multiple output (MIMO) radar. First, based on the relationship between the carrier frequency and the distribution of BSSL, the non-overlapping constraint of BSSL is derived. Then, the multi-carrier frequency design method is provided in detail according to the constraint. By using the designed carrier frequencies, two RFT outputs with non-overlapping BSSL can be obtained. By jointly processing the RFT outputs, BSSL suppression can be realized. Furthermore, an evaluation method of the BSSL suppression is also provided. Both theoretical analysis and numerical experiments show that the proposed method can effectively suppress BSSL without deteriorating the integration performance of the RFT.

Key words: MIMO radar, long time coherent integration, Radon-Fourier transform, blind speed side lobe suppression, carrier frequency design

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