【作者】 王昊； 孙超； 郭祺丽；

【Author】 WANG Hao;SUN Chao;GUO Qi-li;College of Marine Engineering,Northwestern Ploytechnical University;

【机构】 西北工业大学航海学院；

【摘要】 将均匀圆阵ESRPIT算法(信号参数估计旋转不变技术)引入对宽带源的二维目标方位估计中来。先将宽带信号不同频率分量的信号子空间聚焦到同一参考频率信号子空间上,在此基础上将均匀圆阵阵元空间映射到模式空间,使得信号子空间存在旋转不变性,从而可以利用ESPRIT算法进行二维目标方位估计。理论分析和仿真实验验证了该算法对宽带源有较好的估计效果,并且同MUSIC算法相比有效的降低了运算量。更多还原

【Abstract】 The narrow band ESPRIT method based on uniform circular array is introduced to the 2-D DOA estimation for wide band sources.First,we focus the signal subspaces of different frequenciesin the signal bandwidthonto a signal subspace at the reference frequency,andthen map the signals received by uniform circular arrays to thebeam space which makes the signal subspace have the nature of rotational invariance,so we can use the ESPRIT method to estimate the 2-D DOAs.Theoretical analysis and computer simulation demonstrate the effectiveness of method for wideband sources,and the computational burden is reduced remarkablycompared with the MUSIC method.更多还原