电子学报2011，Vol.39Issue(6)：1291-1296,6.
基于调频Z变换的均匀线阵波达方向估计
An Algorithm for Wideband Direction of Arrival Estimation Based on Chirped Z Transform
摘要
Abstract
An algorithm forwideband direction ofarrival (DOA) estimation based on chirped Z transform (CZT) is proposed. According to the ideally focusing condition of uniform linear array (ULA) ,an idea in the wave vector space to solve focusing matrices and the corresponding solution are presented:A row vector in the focusing matrix at the focusing frequency is chosen,as for the focusing matrix of an arbitrary sub-band,the spectrum of the row vector at same position is calculated with CZT, and all vectors are obtained by inverse fast Fourier transform (IFFT). With this method,any value within the signal frequency range can be chosen as the focusing frequency,and good asymptotic unbiased performance can be acquired without any pre-estimated DOA. The validity of these conclusions is validated with computer simulations and pool experiments.关键词
宽带波达方向估计/相干信号子空间方法/调频Z变换/有效孔径不变的CZT法Key words
wideband direction of arrival (DOA) estimation/coherent signal subspace method (CSM)/chirped Z transform (CZT)/ CSM based on CZT with Invariable Aperture (CZTIA)分类
信息技术与安全科学引用本文复制引用
刘建国,严胜刚..基于调频Z变换的均匀线阵波达方向估计[J].电子学报,2011,39(6):1291-1296,6.基金项目
第42批中国博士后科学基金一等资助(No.20070420181) （No.20070420181）
首批中国博士后科学基金特别资助(No.200801487) （No.200801487）
