Fully Automatic Computation of Diagonal Loading Levels for Robust Adaptive Beamforming
Fully Automatic Computation of Diagonal Loading Levels for Robust Adaptive Beamforming
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DOI：
10.1109/taes.2010.5417174
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发表时间：
2010-01-01
影响因子：
4.4
通讯作者：
Stoica, Petre
中科院分区：
文献类型：
--
作者：
Du, Lin;Li, Jian;Stoica, Petre
传统的对角加载（DL）方法的主要缺点是没有关于如何可靠地选择DL电平或如何适当地选择用户参数的明确指导方针。被认为是一种算法，可以用来计算的DL水平完全自动从给定的数据，而不需要指定任何用户参数。在该算法中，增强的协方差矩阵估计通过收缩方法获得，而不是样本协方差矩阵，在标准Capon波束形成公式中使用。所得到的波束形成器的性能示出通过数值例子，它与其他几个自适应波束形成器进行了比较。
The main drawback of the conventional diagonal loading (DL) approaches is that there is no clear guideline on how to choose the DL level reliably or how to select user parameters appropriately. An algorithm that can be used to compute the DL level completely automatically from the given data without the need of specifying any user parameter is considered. In this algorithm an enhanced covariance matrix estimate obtained via a shrinkage method, instead of the sample covariance matrix, is used in the standard Capon beamforming formulation. The performance of the resulting beamformer is illustrated via numerical examples, and it is compared with several other adaptive beamformers.