| 摘要: |
| 针对存在互耦效应时均匀平面阵的测向鲁棒性问题，提出了一种基于秩损准则的互耦自校正算法。根据对互耦效应的先验知识，提出的算法只需将受互耦扰动的阵列响应在变换域中重新排列，便可在后续处理中屏蔽掉互耦效应的不利影响，同时也避免了现有工作中存在的阵列孔径损失问题。借助秩损估计原理，在变换域中设计了一种巧妙的计算步骤，使得方位估计的降维操作得以实现；并且，后续还可通过特征分解法得到更精确的互耦系数估计，以进行阵列误差自校正。与现有的研究工作相比，所提算法无论是在估计精度，还是在计算效率上均有着显著的性能优势。 |
| 关键词: 均匀平面阵 到达角估计 互耦效应 自校正 秩损准则 |
| DOI： |
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| 基金项目: |
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| 2-D DOA estimation and mutual coupling self-calibration for uniform planar arrays |
| LIU Jiang,ZHANG Chen |
| () |
| Abstract: |
| For the robustness problem of direction finding algorithm using uniform planar arrays under mutual coupling,a rank reduction based self-calibration algorithm is proposed. Based on the priori knowledge of mutual coupling,the perturbed array response is just rearranged in the transform domain,thus being able to mask the adverse effect of mutual coupling,and avoid the aperture loss as well. Then according to the rank reduction criteria,the reduced-dimension processing is performed by applying suitably designed estimation procedure. Moreover,an accurate estimation of coupling coefficients can also be acquired for array calibration by eigen decomposition. Compared with the existing method,the proposed algorithm is more numerically efficient with improved accuracy. |
| Key words: uniform planar arrays direction of arrival estimation mutual coupling self-calibration rank reduction criteria |
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