近场条件下的MIMO雷达阵列优化

doi:10.3969/j.issn.0255-8297.2013.04.009

应用科学学报 ›› 2013, Vol. 31 ›› Issue (4): 387-393.doi: 10.3969/j.issn.0255-8297.2013.04.009

近场条件下的MIMO雷达阵列优化

陈刚，顾红，苏卫民，吴昊

南京理工大学电子工程与光电技术学院，南京210094

收稿日期:2012-04-01 修回日期:2012-09-14 出版日期:2013-07-27 发布日期:2012-09-14
通信作者: 陈刚，博士生，研究方向：稀疏阵列MIMO雷达成像技术，E-mail: gang.chen@foxmail.com
作者简介:陈刚，博士生，研究方向：稀疏阵列MIMO雷达成像技术，E-mail: gang.chen@foxmail.com；顾红，教授，博导，研究方向：噪声雷达理论和应用等，E-mail: guhong666@mail.njust.edu.cn；苏卫民，教授，博导，研究方向：雷达成像理论和技术等，E-mail:suweimin@mail.njust.edu.cn
基金资助:
教育部博士点基金(No.20113219110018)；部预研基金(No.9140A07010311BQ02)；南京理工大学研究基金(No.2010ZDJH05,
No.2011JDJH13)资助

Optimization of MIMO Radar Arrays in Near Field

CHEN Gang, GU Hong, SU Wei-min, WU Hao

School of Electronic and Optical Engineering, Nanjing University of Science and Technology,Nanjing 210094,China

Received:2012-04-01 Revised:2012-09-14 Online:2013-07-27 Published:2012-09-14

摘要/Abstract

摘要： 在近场条件下运用遗传算法对MIMO雷达阵列进行优化. 构造优化MIMO阵列近场方向图旁瓣的适应度函数，提出一种基于FFT的快速算法用以高效评估适应度，采用“成对交叉策略”保证遗传算法进化过程中阵列稀疏率恒定. 对有无对称约束两种情况下的阵列优化结果进行比较，分析表明，若在MIMO阵列优化中加入对称
约束，则优化针对的聚焦点所在距离上所有角度均小于该点的目标，用优化所得之阵列扫描它们时可保持性能.

关键词: MIMO雷达, 近场, 遗传算法, 阵列优化

Abstract: This paper optimizes MIMO radar arrays in the near field using the genetic algorithm (GA). GA determines which elements are turned on in the two periodic arrays (transmitting and receiving arrays) to yield the lowest maximum relative sidelobe level. A fitness function of GA for MIMO radar near field pattern is
constructed, and a fast method based FFT is given to calculate the function. A pair crossover strategy is used to make a constant thinned ratio. Simulations are performed to compare the optimization of MIMO radar with symmetric and asymmetric arrays. Analysis shows that, by optimizing the MIMO radar with symmetric arrays and when focusing on a point in the detecting region, they can yield arrays that can maintain the performance when scanning other points in the same range and with a smaller angle.

Key words: MIMO radar, near field, genetic algorithm, array optimization

中图分类号:

TN957. 51

陈刚，顾红，苏卫民，吴昊. 近场条件下的MIMO雷达阵列优化[J]. 应用科学学报, 2013, 31(4): 387-393.

CHEN Gang, GU Hong, SU Wei-min, WU Hao. Optimization of MIMO Radar Arrays in Near Field[J]. Journal of Applied Sciences, 2013, 31(4): 387-393.

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近场条件下的MIMO雷达阵列优化

Optimization of MIMO Radar Arrays in Near Field

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