| 基于变对角加载的RCB算法 |
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| 作者姓名： | 倪淑燕 程乃平 倪正中 |
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| 作者单位： | 装备指挥技术学院;遥感信息研究所; |
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| 摘 要： | 稳健的Capon波束形成(RCB)算法确定的加载量与设定的导向矢量误差范围成正比,在导向矢量误差比较小时,加载量也比较小,这时对小快拍的稳健性就很差。为了改善RCB算法在小快拍时的性能,提出一种基于变对角加载的RCB算法,利用估计的协方差矩阵误差对采样协方差矩阵进行修正,用修正后的协方差矩阵代替原协方差矩阵代入到RCB算法的权向量求解过程中,这样可以根据导向矢量误差和协方差矩阵误差动态调整加载量,在不增加计算复杂度的基础上,可以获得比RCB算法更好的稳健性。计算机仿真验证了算法的有效性。
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| 关 键 词： | 阵列信号处理 波束形成 导向矢量 对角加载 |
RCB Algorithm Based on Variable Diagonal Loading |
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| Authors: | Ni Shuyan Cheng Naiping Ni Zhengzhong |
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| Institution: | Ni Shuyan,Cheng Naiping,Ni Zhengzhong |
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| Abstract: | The diagonal loading level of the robust Capon beamformer(RCB) is in direct proportion to the error range of steering vector.When the vector error is small,the loading level is low,so the RCB algorithm has little robustness to small snapshot number.In order to improve its performance in this situation,a modified RCB algorithm based on variable diagonal loading is proposed.The algorithm firstly calibrates the sample covariance matrix utilizing the estimated covariance matrix error,and then the calibrated cov... |
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| Keywords: | Array signal processing Beamforming Steering vector Diagonal loading |
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