| 王朋,黄勇,刘纪元.基于高分辨谱估计方法的快速运动目标分析*[J].,2013,32(5):401-408 |
| 基于高分辨谱估计方法的快速运动目标分析* |
| Fast moving target analysis based on the high resolution spectral estimation |
| 投稿时间：2013-07-12 修订日期：2013-08-23 |
| 中文摘要: |
| 水下运动目标产生的声场由一系列不同模态的简正波组成,不同模态简正波具有不同的多普勒频率移动,携带了运动目标速度、频率等参数的信息。针对快速运动目标水下辐射声场的这一特点,采用高分辨谱估计Burg算法估计不同模态简正波多普勒频移,进而获得运动目标的速度、频率参数估计。数值仿真结果表明,高分辨谱估计Burg算法获得了高频率分辨率,在较短的观测时间或是阵元不足的情况下,较准确地估计了多普勒频移,获得了目标运动速度和初始频率等运动参数。 |
| 英文摘要: |
| The acoustic field generated by the underwater moving source can be approximately represented by normal modes, andSeach mode has a different modal Doppler shift frequency. The modes are considered to remain the velocity and intrinsic frequency of source. In light of the characteristics of a fast moving source in the underwater acoustic field, an approach based on high resolution spectral estimation is adopted to estimate the source velocity and intrinsic frequency. Numerical simulation results demonstrate that high resolution spectral estimation, Burg, can successfully identify the modal Doppler shifts in the case where observation is made by small aperture size arrays or a short observing interval. As a result, the velocity and intrinsic frequency of the moving source are obtained successfully. |
| DOI：10.11684/j.issn.1000-310X.2013.05.012 |
| 中文关键词: 模滤波,高分辨谱估,运动目标分析 |
| 英文关键词: Mode filtering, High-resolution spectral estimation, Moving target analysis |
| 基金项目: |
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