|
|||||
|
|
| 基于均匀线阵的混合源波达方向估计方法 | |
| 引用本文： | 令瀚,黄志清,张丽娅.基于均匀线阵的混合源波达方向估计方法[J].通信技术,2009,42(1):123-125. |
| 作者姓名： | 令瀚 黄志清 张丽娅 |
| 作者单位： | 1. 甘肃省定西市气象局,甘肃,定西,743000;中国科学技术大学电子工程与信息科学系,安徽,合肥,230027 2. 镇江船艇学院,江苏,镇江,212003 3. 甘肃省定西市气象局,甘肃,定西,743000 |
| 摘 要： | 文中提出了一种基于均匀线阵的混合源波达方向DOA估计的改进方法。该方法首先利用传统MUSIC方法估计出非相干信号源的DOA，然后接收数据协方差矩阵进行差分消除不相关源和噪声的影响，对其进行特殊的空间平滑去相干，从而利用重建的数据协方差矩阵估计相干源的DOA。此方法的特点是分别估计不相关信号和相干信号的DOA。优点是算法在估计出多于阵元数信号的前提下具有较高的DOA估计精度和稳健性。仿真结果表明此方法的估计性能优于空间差分平滑算法。 |
| 关 键 词： | 均匀线阵 相干源 波达方向 空间平滑技术 负反对称矩阵 |
DOA Estimation for Mixed Signal Situation with Uniform Linear Array |
|
| LING Han,HUANG Zhi-qing,ZHANG Li-ya.DOA Estimation for Mixed Signal Situation with Uniform Linear Array[J].Communications Technology,2009,42(1):123-125. | |
| Authors: | LING Han HUANG Zhi-qing ZHANG Li-ya |
| Affiliation: | LING Han, HUANG Zhi-qing, ZHANG Li-ya((1)Ding Xi Meteorology Bureau of Gansu Province, Dingxi Gansu 743000, China ;(2)Dept. of Electronic Engineering and Information Science, USTC Hefei Anhui 230027, China ;(3)Zhenjiang Watercraft College, Zhenjiang Jiangsu 212003, China) |
| Abstract: | An improved direction of arrival （DOA） estimation method is proposed with uniform linear array （ULA） when mixed sources are presented. The DOAs of uncorrelated signals are first estimated by using conventional multiple signal classification （MUSIC）. Then the spatial difference matrix is constructed and the contributions of uncorrelated signals are eliminated. Then the coherent signals can be resolved by performing the improved spatial smoothing technique to the spatial difference matrix. The number of sources resolved by the proposed method can exceed the number of array elements. Simulation results indicate that the proposed method is effective, robust and outperforms the existing spatial difference smoothing methods. |
| Keywords: | uniform linear array （ULA） coherent sources direction-of-arrival （DOA） spatial smoothing technique negative-cross-symmetric matrix |
| 本文献已被 维普 万方数据 等数据库收录！ | |