摘要
针对二维旋转不变子空间算法(estimation of signal parameters via rotational invariance technigues,ESPRIT)在求解信号时协方差矩阵存在阵列冗余问题,提出一种改进后的二维ESPRIT算法。该算法利用阵列结构原理构造2个互相关矩阵,然后由合并的特殊大矩阵进行奇异值分解来估计信号子空间,最后利用2D-ESPRIT方法实现二维测向。该算法估计精度高,计算量小,通过空间平滑后既能对相干信号进行估计,也能同时估计非相干信号。
When the 2-D ESPRIT algorithm is used to treat two-dimensional signals,there is a great deal of redundancy in the arrays.A new 2-D improved ESPRIT algorithm was proposed.This algorithm used the geometries characteristic of a double linear array to construct a mixed matix,and then the signal subspace was obtained via the singular value decomposition of the matix in the 2D-ESPRIT method.This method could estimate the signal with less work,and get good estimation results.It could estimate both coherent signals and non-coherent signals by the spatial smoothing method.
出处
《山东大学学报（工学版）》
CAS
北大核心
2010年第2期149-152,158,共5页
Journal of Shandong University（Engineering Science）
基金
黑龙江省科技攻关资助项目(GZ08A101)
关键词
波达方向估计
二维ESPRIT
奇异值分解
相干信号
direction of arrival estimation
2-D ESPRIT
singular value decomposition
coherent signal
