单快拍数据的分布式阵列DOA估计

向洪; 王俊; 魏少明; 高越; 毛士艺

doi:10.11999/JEIT160093

单快拍数据的分布式阵列DOA估计

doi: 10.11999/JEIT160093

1.
(北京航空航天大学电子信息工程学院北京 100191) ②(航天恒星科技有限公司北京 100086)

基金项目:

国家自然科学基金(61471019, 61501011, 61501012)，中央高校基本科研业务费专项资金(YWF-15-GJSYS-0068)，重点实验室基金(9140C800101140C80331)

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- 文章访问数: 1678
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- 被引次数: 0
出版历程
- 收稿日期: 2016-01-19
- 修回日期: 2016-06-08
- 刊出日期: 2016-11-19

DOA Estimation of Distributed Array with Single Snapshot

1.
(School of Electronics and Information Engineering, Beihang University, Beijing 100191, China)
2.
(Space Star Technology Corporation, LTD, Beijing 100086, China)

Funds:

The National Natural Science Foundation of China (61471019, 61501011, 61501012), The Fundamental Research Funds for the Central Universities (YWF-15-GJSYS-0068), The Key Laboratory Foundation (9140C800101140C80331)

摘要

摘要: 该文针对分布式阵列相干信号单次快拍波达方向估计问题，提出一种基于状态空间平衡法的1维波达角估计算法。该算法首先直接利用单快拍数据以分布式阵列每个子阵单元进行Hankle矩阵构造，然后采用状态空间平衡法，分别获得低精度无模糊的子阵单元内DOA估计和高精度有模糊的子阵单元间DOA估计，最后结合配对和解模糊算法获得高精度无模糊DOA估计。该算法不受信号形式限制，可同时对相干信号和非相干信号进行处理，能充分利用分布式阵列扩展阵列物理孔径特性，获得较高的DOA估计精度。计算机仿真结果验证了所提算法的有效性。
- DOA估计 /
- 分布式阵列 /
- Hankle矩阵 /
- 解模糊
Abstract: An algorithm of Directions Of Arrival (DOA) estimation based on the state-space method is proposed to deal with the problem of estimating DOA of multiple source signals from a single observation vector of distributed array. Hankle matrixes are firstly constructed by using the single snapshot of every subarray element. Then low accuracy and unambiguous DOA estimations are obtained by the single subarray, while high accuracy and ambiguous DOA estimations are obtained by the distributed array. Finally, high accuracy and unambiguous DOA estimations are obtained by using automatic pairing decorrelating. This algorithm has no relations with the correlation signals and can fully take advantage of the large aperture to acquire high DOA estimation. Computer simulation results confirm the effectiveness of the proposed algorithm.
- DOA estimation /
- Distributed array /
- Hankle matrix /
- Decorrelating

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参考文献(30)

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