This paper addresses the issue of the direction of arrival （DOA） estimation under the compressive sampling （CS） framework. A novel approach, modified multiple signal classification （MMUSIC） based on the CS array...This paper addresses the issue of the direction of arrival （DOA） estimation under the compressive sampling （CS） framework. A novel approach, modified multiple signal classification （MMUSIC） based on the CS array （CSA-MMUSIC）, is proposed to resolve the DOA estimation of correlated signals and two closely adjacent signals. By using two random CS matrices, a large size array is compressed into a small size array, which effectively reduces the number of the front end circuit. The theoretical analysis demonstrates that the proposed approach has the advantages of low computational complexity and hardware structure compared to other MMUSIC approaches. Simulation results show that CSAMMUSIC can possess similar angular resolution as MMUSIC.展开更多
在相干信源下,传统的MUSIC(MUltiple SIgnal Classification)算法不能准确地估计波达方向。为此,在对传统的MUSIC算法进行研究的基础上,提出了一种改进的MUSIC算法。该算法是将阵元接收的数据做相应的变换,从而得到新的阵列数据,再通过...在相干信源下,传统的MUSIC(MUltiple SIgnal Classification)算法不能准确地估计波达方向。为此,在对传统的MUSIC算法进行研究的基础上,提出了一种改进的MUSIC算法。该算法是将阵元接收的数据做相应的变换,从而得到新的阵列数据,再通过求互协方差等运算,得到新的数据协方差矩阵。同时,对该算法和传统的MUSIC算法进行了仿真,对其DOA(Direction-of-Arrival)估计性能进行比较。仿真实验表明,改进后的算法在相干信源的情况下具有很好的去相干性能,而且没有阵列孔径的损失。能精确地估计信号的波达方向。展开更多
基金supported by the National Natural Science Foundation of China(6117119761371045+2 种基金61201307)the Shandong Provincial Natural Science Foundation(ZR2011FM005)the Shandong Provincial Promotive Research Fund for Excellent Young and Middle-aged Scientists(BS2010DX001)
文摘This paper addresses the issue of the direction of arrival （DOA） estimation under the compressive sampling （CS） framework. A novel approach, modified multiple signal classification （MMUSIC） based on the CS array （CSA-MMUSIC）, is proposed to resolve the DOA estimation of correlated signals and two closely adjacent signals. By using two random CS matrices, a large size array is compressed into a small size array, which effectively reduces the number of the front end circuit. The theoretical analysis demonstrates that the proposed approach has the advantages of low computational complexity and hardware structure compared to other MMUSIC approaches. Simulation results show that CSAMMUSIC can possess similar angular resolution as MMUSIC.
文摘在相干信源下,传统的MUSIC(MUltiple SIgnal Classification)算法不能准确地估计波达方向。为此,在对传统的MUSIC算法进行研究的基础上,提出了一种改进的MUSIC算法。该算法是将阵元接收的数据做相应的变换,从而得到新的阵列数据,再通过求互协方差等运算,得到新的数据协方差矩阵。同时,对该算法和传统的MUSIC算法进行了仿真,对其DOA(Direction-of-Arrival)估计性能进行比较。仿真实验表明,改进后的算法在相干信源的情况下具有很好的去相干性能,而且没有阵列孔径的损失。能精确地估计信号的波达方向。
