太赫兹科学与电子信息学报Issue(5)：765-769,5.DOI:10.11805/TKYDA201305.0765
基于空频解耦的宽带DOA估计算法
DOA estimation of wideband signal based on Keystone transform
摘要
Abstract
Direction Of Arrival(DOA) estimation for wideband signal is one of the hot issues in wideband array signal processing. Aperture fill effect is an important factor to affect the estimation precision of wideband DOA when wideband signal range resolution and wideband aperture are comparable. On the basis of the linear coupling characteristic between spatial domain and frequency domain of wideband array signal, Keystone transform is adopted for decoupling. Then the decoupled data is used for DOA estimation with coherent accumulation method. The results of simulation show that the precision of DOA estimation is improved remarkably by eliminating the effect of aperture fill effect. The proposed algorithm is an effective method due to its lower computational complexity and higher DOA estimation precision.关键词
宽带信号/孔径渡越时间/梯形变换/宽带波达方向估计Key words
wideband signal/aperture fill time/Keystone transform/Direction Of Arrival estimation分类
信息技术与安全科学引用本文复制引用
苏志刚,温宙,刘海涛,吴仁彪..基于空频解耦的宽带DOA估计算法[J].太赫兹科学与电子信息学报,2013,(5):765-769,5.基金项目
中央高校科技基本科技业务费中国民航大学专项基金资助项目(ZXH2012H002)；天津市自然科学基金资助项目(09JCYBJC00600) （ZXH2012H002）
