华中科技大学学报：自然科学版2011，Vol.39Issue(9)：16-19,4.
采用 RWT的信号波达方向估计方法
Signal arrival direction estimation method using RWT
摘要
Abstract
According to the low accuracy of direction of arrival （DOA） estimation for wideband linear frequency modulation （LFM） signals, a method of DOA estimation based on Radon-Wigner transform （RWT） and multiple signal classification （MUSIC） was proposed. In this method, first the original frequency and the frequency modulation slope were extracted by peak research, with the excellent time-frequency concentration performance of RWT which can eliminate cross interference terms and noise effectively in the background of multiple sources. Then the time-variable direction matrix of sig- nal array was transformed to the fixed direction matrix, and the RWT domain correlation matrix of the sensor array sources was acquired. Finally the MUSIC spatial spectrum analysis algorithm was used to estimate the DOA of signals. The results show that this method based on RWT can estimate DOA ef- ficiently for non-stationary signals.关键词
线性调频信号/波达方向估计/Radon-Wigner变换（RWT）/多重信号分解/交叉项抑制Key words
linear frequency modulation signals/direction of arrival estimation/Radon-Wigner trans-form （RWT）/multiple signal classifieation/cross terms suppression分类
电子信息工程引用本文复制引用
许建忠,王祖林,郭旭静..采用 RWT的信号波达方向估计方法[J].华中科技大学学报：自然科学版,2011,39(9):16-19,4.基金项目
教育部博士学科点专项科研基金资助项目（20091102120010）. （）
