雷达科学与技术Issue(3)：314-319,323,7.DOI:10.3969/j.issn.1672-2337.2015.03.019
应用于波束域的改进 TOFS 算法
An Improved TOFS Algorithm for DOA Estimation in Beam-Space Domain
摘要
Abstract
Test of orthogonality of frequency subspace(TOFS)is a relatively new method for wideband signal direction of arrival(DOA)estimation.It estimates the DOA of signals by measuring the orthogonal re-lation between the vectors which are constructed by angles and frequency as well as noise subspaces of multi-ple frequency components,and avoids focusing operation and preliminary DOA estimation.However,the method can not process coherent signals.To address this problem,an improved TOFS method is proposed, which combines the matrix conjugated reconstruction method with the TOFS method.The improved TOFS method can process coherent sources well and improve the accuracy of estimation.Furthermore,the array number is a primary influence on the computation time,where the larger the array number is,the heavier the computation cost will be.In this paper,the improved algorithm is applied in beam space domain to reduce the computational dimensions without decreasing the original precision of the estimation in array space.The simulation results show that the new method provides better performance than the original one.关键词
宽带阵列信号/波达方向估计/频域子空间正交性测试算法/解相干/波束域Key words
wideband array signal/direction-of-arrival estimation/test of orthogonality of frequency subspace algorithm(TOFS)/de-correlation/beam-space分类
信息技术与安全科学引用本文复制引用
施思,鲍庆龙,陈曾平..应用于波束域的改进 TOFS 算法[J].雷达科学与技术,2015,(3):314-319,323,7.基金项目
国家自然科学基金 （）
