| 采用空间谱加权稀疏约束的稳健Capon波束形成方法 |
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| 引用本文： | 郭拓,王英民,任笑莹,马远良.采用空间谱加权稀疏约束的稳健Capon波束形成方法[J].声学学报,2018,43(4):612-619. |
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| 作者姓名： | 郭拓 王英民 任笑莹 马远良 |
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| 作者单位： | 西北工业大学 航海学院 西安 710072 |
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| 基金项目： | 国家自然科学基金项目(61671378)资助 |
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| 摘 要： | 针对标准Capon波束形成器旁瓣级高以及期望信号方向存在误差时,性能会严重下降的问题,提出一种基于噪声及干扰空间谱加权的稀疏约束Capon波束形成方法。该方法利用波束响应本身具有的稀疏特性,以及在稀疏重构算法中l1范数具有抑制较大值保护较小值的特性,使用噪声及干扰的空间谱对不同角度的波束响应进行加权,然后施以稀疏约束。仿真、水池试验与湖上试验中,与其它几种方法比较表明该方法可以降低波束形成器的旁瓣级,获得较深的零陷,提高了阵列输出信干噪比与抗导向向量误差的能力。
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| 关 键 词： | 阵列信号处理 空间谱加权 Capon波束形成 稀疏约束 |
| 收稿时间： | 2018-01-11 |
A weighted sparse constrained robust Capon beamforming method based on spatial spectrum |
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| Affiliation: | School of Marine Science and Technology, Northwestern Polytechnical University Xi'an 710072 |
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| Abstract: | According to the fact that the Standard Capon Beamformer (SCB) is sensitive to the steering vector mismatch of the desired signal, and the sidelobe level is high. A sparse constrained Capon beamforming method based on noise and interference spatial spectrum weighting is proposed. The method uses the sparse characteristics of the beam response itself, at the same time it takes advantage of l1 norm suppressing the larger value and protecting the smaller value. It uses the spatial spectrum of noise and interference to weight the beam response at different angles, and then sparse constraints is imposed. In the simulation, water tank experiments and lack experiments, it is shown that the method can reduce the sidelobe level of the beamformer and obtain the deeper hulling, and it can also improve tile ability of the array output Signal to Interference plus Noise Ratio (SINR) and anti-steering vector error. |
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