| 基于十字阵的MIMO雷达的二维DOA估计 |
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| 引用本文： | 武华亭,张弓,张余宽.基于十字阵的MIMO雷达的二维DOA估计[J].电子工程师,2011,37(2):13-18. |
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| 作者姓名： | 武华亭 张弓 张余宽 |
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| 作者单位： | 1. 南京航空航天大学电子信息工程学院,江苏南京,210016
2. 南京航空航天大学电子信息工程学院,江苏南京,210016;94865部队92分队,浙江杭州,310000 |
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| 摘 要： | 多输入多输出（MIMO）雷达使用多个天线同时发射独立波形，在不同位置的目标回波彼此线性独立，以获得较好的空间分辨率。文章提出了基于收发不共位的线阵在水平面内构成十字阵的MIMO雷达信号模型；研究利用MUSIC算法来估计该模型下的MIMO雷达的二维波达角；分析了基于均匀十字阵的MIMO雷达的优越性，并探讨了十字阵MIMO雷达性能与阵元间距的关系，仿真表明，在满足远场条件下，均匀十字阵比均匀线阵可以估计更多的目标而且精度更高；通过非均匀布阵，可以进一步提高MIMO雷达的二维波达角的估计精度。
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| 关 键 词： | MIMO雷达 十字阵 波达角 MUSIC |
2D-DOA Estimation for MIMO Radar Based on Cross Array |
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| WU Hua-ting,ZHANG Gong,ZHANG Yu-kuan.2D-DOA Estimation for MIMO Radar Based on Cross Array[J].Electronic Engineer,2011,37(2):13-18. |
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| Authors: | WU Hua-ting ZHANG Gong ZHANG Yu-kuan |
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| Affiliation: | 1. School of Electronic Information and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. The 92 Squadron of 94865 Unit, Hangzhou 310000, China) |
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| Abstract: | Multiple-input multiple-output （MIMO） radar transmits independent waveforms simultaneously via different antennas. The echoes due to targets at different locations are linearly independent of each other, which can achieve high resolution. In this paper, we propose a MIMO radar signal model that is based on cross array, which is formed by non-overlapping linear array of transceiver in the horizontal plane; and we study the MUSIC algorithm to estimate the MIMO radar＇ s 2-dimension direction of arrival （DOA） based on this model; and we also simulate and analyze the superiority of MI- MO radar based on uniform cross array; at last, we investigate the relationship between the performance of MIMO radar and the interval of array. Simulation results show that by using the non-uniform linear array, MIMO radar can improve estimation accuracy of 2-dimension DOA. |
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| Keywords: | multiple input and multiple out （MIMO）radar cross array direction of arrival （DOA） MUSIC |
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