| 摘要: |
| 无线通信系统中的多输入多输出(Multiple Input Multiple Output，MIMO)技术与雷达探测所结合产生的新体制MIMO雷达，在应对隐身目标和降低信号截获概率方面拥有着传统雷达无可比拟的优势。作为雷达目标空间位置的主要参数之一，角度估计的发展历程和现存问题值得关注。本文将对MIMO雷达的角度估计技术进行系统评述。首先，以MIMO雷达的作用原理和分类作为切入点，根据获取角度信息的方式，将现阶段使用较为广泛的MIMO雷达角度估计算法划分为搜索类、免搜索类、求根类以及子空间快速估计类四大类别。之后，全面介绍了当前各类MIMO雷达角度估计算法的应用原理，并重点分析、对比各自的优缺点。最后，以雷达测角理论工程化推进为向导，给出了MIMO雷达角度估计技术的未来发展趋势。 |
| 关键词: MIMO雷达 角度估计 搜索 求根 子空间 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.02.004 |
| 分类号:TN958 |
| 基金项目: |
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| Overview on the Target Angle Estimation Technologies for MIMO Radar |
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ZHAI Hua，MENG Xiangtian，YAN Fenggang
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1.Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China;2.School of Electronics and Information Engineering, Harbin Institute of Technology,Harbin 150000,China
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| Abstract: |
| The newly developed MIMO radar system, which is a combination of multiple input multiple output (MIMO) technology in wireless communication area and radar detection, has incomparable advantages over traditional radars in terms of dealing with stealth targets and reducing the probability of signal interception. Angle estimation is one of the main parameters for the space position of target, its development processes and existing problems deserve attention. The angle estimation technology of MIMO radar has been reviewed systematically in this article. Firstly, the existing MIMO radar angle estimation algorithms are divided into four categories based on the principle and classification of MIMO radar: search, search-free, root finding and fast subspace estimation. The application principles of various current MIMO radar angle estimation algorithms are introduced comprehensively, and their advantages and disadvantages are analyzed and compared respectively. Finally, by exploring how the theory of radar angle measurement can be extended to engineering, the future deve-lopment trend of MIMO radar angle estimation technology is given. |
| Key words: MIMO radar angle estimation search root finding subspace |
