| 刘贯领,汪素萍,余小琴.一种稳健的柔性阵波束形成方法[J].,2011,30(1):26-30 |
| 一种稳健的柔性阵波束形成方法 |
| A robust beamforming technique for flexible arrays |
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| 中文摘要: |
| 由于航向、航速的改变以及水流、风浪等因素的影响,柔性线列阵在实际应用过程中阵型畸变是不可避免的。一方面,这种畸变使得许多假设阵型无畸变的波束形成方法的性能受到严重的影响;另一方面,目前很多的阵型估计方法仍不是很成熟,很难准确估计阵元的实际位置。本文提出将柔性阵列分为一段阵元位置已知的子阵和若干段阵元未知的子阵,利用不同子阵接收信号的互相关即可获得所需要的波束形成加权系数,从而在不需要知道阵元确切位置信息的情况下实现目标方法的估计。 |
| 英文摘要: |
| Due to the course and speed change induced by ship maneuvering and the unpredictable underwater turbulence,wind and other factors,the shape distortion of flexible arrays are inevitable.On the one hand,this leads to severe performance degradation of most of the present beamforming techniques that either assumes the array shape is undistorted or neglects the distortion;On the other hand,robust array shape estimation method is yet unavailable.In this paper,a robust technique is proposed to estimate the direction of arrival of targets without any a priori knowledge of the exact array element positions.The array is divided into a small segments with known shape and several other segment with unknown shapes.Only the cross-correlation relationships among these sub-arrays are used to obtain the weight vector. |
| DOI：10.11684/j.issn.1000-310X.2011.01.004 |
| 中文关键词: 柔性阵 阵型畸变 子阵 互相关 波束形成 |
| 英文关键词: Flexible array Shape distortion Sub-array Cross correlation Beamforming |
| 基金项目: |
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