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| 一种空间非均匀噪声环境下DOA估计的改进方法 | |
| 引用本文： | 令瀚,李德生,叶中付.一种空间非均匀噪声环境下DOA估计的改进方法[J].通信技术,2008,41(9). |
| 作者姓名： | 令瀚 李德生 叶中付 |
| 作者单位： | 1. 中国科技大学,信号统计处理研究室,安徽,合肥,230027;甘肃省定西市气象局,甘肃,定西,743000 2. 中国科技大学,信号统计处理研究室,安徽,合肥,230027;山东省气象科学研究所,山东,济南,250031 3. 中国科技大学,信号统计处理研究室,安徽,合肥,230027 |
| 摘 要： | 文中提出一种空间非均匀噪声环境下的信号源DOA估计的改进方法.该算法首先对阵列协方差矩阵进行平滑处理,在此基础上估计出空间非均匀噪声协方差矩阵,通过已估计的噪声协方差矩阵对平滑处理后的阵列数据协方差矩阵进行白化处理,克服了空间非均匀噪声对空间谱估计的影响,实现信号源DOA估计.相对于原方法,文中所提方法改善了DOA估计的性能,计算量小,并且能够估计强相关或相干信号源DOA.理论分析和仿真结果均表明所提方法的有效性. |
| 关 键 词： | 平滑处理技术 空间非均匀噪声 阵列信号处理 波达方向估计 |
Improved DOA Estimation in the Presence of Spatially Nonuniform Noise |
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| LING Han,LI De-sheng,YE Zhong-fu.Improved DOA Estimation in the Presence of Spatially Nonuniform Noise[J].Communications Technology,2008,41(9). | |
| Authors: | LING Han LI De-sheng YE Zhong-fu |
| Affiliation: | LING Han ,LI De-sheng ,YE Zhong-fu (Institute of Statistics Signal Processing,University of Science , Technology of China,Hefei Anhui 230027,China,Dingxi Meteorology Bureau of Gansu Province,Dingxi Gansu 743000,Sh,ong Institute of Meteorology,Jinan Sh,ong 250031,China) |
| Abstract: | In this paper,an improved method is proposed to estimate source DOAs in the presence of the spatially nonuniform noise.This algorithm first implements pre-processing of the array covariance matrix by the spatial smoothing technique,then the parameter estimation of the nonuniform noise covariance matrix.The smoothed covariance matrix is pre-whited by the estimated noise covariance,thus removing the influence of spatially nonuniform noise on spatial spectrum estimation,and realizing the estimation of source D... |
| Keywords: | spatial smoothing technique spatially nonuniform noise array signal processing DOA |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |