摘要
本文研究了阵元随机扰动对方向估计的影响。指出了在阵元随机扰动下,用MUSIC法和数据矩阵分解法得到的方向估计具有统计无偏性,即从统计意义上讲,阵元的随机扰动对如上两种方法的估计性能没有影响。但由于实际短数据的原因,阵元扰动将会使方向估计产生一定的偏差。本文也给出了这种偏差的统计分析和模拟结果。
The effects of random sensor motion on bearing estimation are investigated. It is concluded that MUSIC and Data-Matrix Decomposition algorithms are of statistically unbiased bearing estimation under random sensor motion. In the application of the MUSIC algorithm, the spatial covariance matrix which is used to derive the signal and noise subspaces is obtained from a finite number of snopshots, as a result of which the sensor random perturbation makes the estimated signal and noise subspaces different from the real ones and those obtained by using the array in its nominal position. This effect of both finite snopshots and random sensor motion on bearing estimation is also described.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
1991年第1期8-18,共11页
Journal of Xidian University
