【作者】 施展； 冯正和；

【Author】 Zhan Shi Zhenghe Feng (Department of Electronic Engineering,Tsinghua University,Beijing 100084)

【机构】 清华大学电子工程系；

【摘要】 传统的鲁棒波束成型算法往往需要一些额外的先验信息才能有效工作。本文提出了一种在不知道信源数目的情况下估计信号子空间投影矩阵的方法。利用估计的投影矩阵,我们设计了一种不需要任何额外先验信息的特征空间鲁棒波束成型算法。仿真实验表明,新算法获得了与传统的特征空间鲁棒波束成型算法相似的性能,而后者需要预先知道信源数。更多还原

【Abstract】 Generally,the traditional robust beamforming algorithms need some additional prior information to work.Without the information about signal sources number,a method of estimating projection matrix onto the signal subspace is proposed.Using the estimated projection matrix,a new eigenspace-based beamforming algorithm is introduced,which does not need any additional prior information.Computer simulation results demonstrate that the proposed beamformer achieves a similar performance as that of the traditional eigenspace-based robust beamformer,which needs to know the number of signal sources..更多还原