基于多载频MIMO雷达的Radon-Fourier变换盲速旁瓣抑制  

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

作　　者：钱李昌[1] 许稼[2] 孙文峰[3] 彭应宁[4] 

机构地区：[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

出　　处：《航空学报》2013年第5期1181-1190,共10页Acta Aeronautica et Astronautica Sinica

基　　金：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~~

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。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 sup- pression 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.

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 

分 类 号：V556.6[航空宇航科学与技术—人机与环境工程]