计算机工程与应用Issue(17)：200-204,244,6.DOI:10.3778/j.issn.1002-8331.1309-0315
一种相干分布式信号二维DOA快速估计方法
Fast method for 2D DOA estimation of coherently distributed signals
王莉 1罗海2
作者信息
- 1. 四川农业大学 信息与工程技术学院，四川 雅安 625014
- 2. 成都工业学院 通信工程系，成都 611730
- 折叠
摘要
Abstract
Based on L-shaped linear array, this paper presents a fast method for the two-dimensional(2D)Direction-Of-Arrival(DOA)estimation of Coherently Distributed(CD)source. The presented method obtains two rotational invariance matrixes about the central DOAs of CD sources by one order Taylor approximation to the generalized steering vectors of two pairs of shifted subarrays. The central DOAs of 2D CD sources are estimated using a new propagator method to solve the rotational invariance matrixes. The method avoids spectrum-peak searching and the eigen decomposition of the high-dimensional sample covariance matrix in classical subspace methods. As a result, the computational cost is signifi-cantly reduced. Under small angular spread, the proposed method provides a good estimation performance and outper-forms Sequential One-dimensional Searching(SOS)algorithm at low SNR. As the new method is a blind estimator, the prior information of the specific angular distribution shapes of distributed sources is not necessary. Simulation results dem-onstrate the effectiveness of the method.关键词
相干分布源/二维波达方向估计/L型线阵/旋转不变矩阵/传播算子法Key words
coherently distributed sources/2-dimensional Direction-Of-Arrival(DOA)estimation/L-shaped linear array/rotational invariance matrix/propagator method分类
信息技术与安全科学引用本文复制引用
王莉,罗海..一种相干分布式信号二维DOA快速估计方法[J].计算机工程与应用,2014,(17):200-204,244,6.
