摘要
研究了使用大型天线阵列对相关信号进行DOA估计的修正协方差矩阵的方法,主要对接收信号的协方差矩阵中的噪声功率部分进行抑制,得出了最终的谱估计式,并进行DOA估计。其理论分析和仿真结果表明,该方法对于相关信号以及空间角度比较接近的信号有较好的分辨能力。
The consideration of Enhanced Covariance Matrix Technique(ECMT) in DOA estimation for coherent signal sources using large-scale array is discussed and introduced in the paper. This technique is to reduce the noise power contribution to the covariance matrix so as to enhance the signal to noise ratio at reception. Its found in our simulation and analysis that the technique can achieve high resolution in resolving coherent signal sources and closely spaced signals. The simulation results are given to validate the consideration.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2004年第1期23-26,共4页
Journal of University of Electronic Science and Technology of China
基金
863计划资助项目(2002AA123032)
关键词
DOA估计
修正的协方差矩阵
相关多径
空间平滑
DOA estimation
enhanced covariance matrix
coherent multipath
spatial smoothing