摘要
针对在空间非平稳噪声环境下传统的MUSIC算法会失效的问题,提出了一种新的波达方向(DOA)估计方法。该方法利用转换矩阵法,通过对阵列数据相关矩阵进行预处理,从而克服噪声对方位估计的影响,并且该算法适用于非均匀线阵,而非均匀线阵在阵元数目一定的情况下,通过合理设置阵元间距,其方位分辨率较之均匀线阵有较大的提高。计算机仿真结果表明,在非平稳噪声环境下利用该算法非均匀线阵的分辨能力要明显高于均匀线阵。
A novel method for estimating signal directions under the circumstance of spatially nonstationary noise is presented in order to overcome the defect of traditionary MUSIC arithmetic. A transform based covariance differencing approach is given ,thus,overcoming the influence of noise. This new arithmetic is the same with nonuniform linear array, and nonuniform linear array has a better resolution than uniform linear array by intercalating the space between the sensor under the circumstance of defined sensor. The computer simulation results show that the proposed algorithm has expected performance for nonuniform linear array.
出处
《计算机仿真》
CSCD
2006年第4期88-89,127,共3页
Computer Simulation
关键词
阵列信号处理
非平稳噪声
非均匀线阵
波达方向估计
Array signal processing
Nonstationary noise
Nonuniform linear array
Estimate direction of arrival
