| 张卫平,王伟策.运动目标声信号的时频特征研究[J].,2004,23(2):26-30 |
| 运动目标声信号的时频特征研究 |
| The time-frequency characteristics of a moving acoustic target |
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| 中文摘要: |
| 提高声被动目标定位精度需要研究运动目标在有风条件下目标声信号的特征。本文从声学波动方程出发,对无风和有常速风情况下的波动方程进行了求解,得到了运动目标声信号的延迟关系;分析了解的主要影响项,并得到了其解析信号;用解析信号对运动目标声信号的延迟特性和时频特征进行了仿真计算。 |
| 英文摘要: |
| In order to improve the accuracy of passive acoustic location, it needs to study the acoustic characteristics of a moving target in wind. Starting from the wave equation of acoustics, in the case of wind with constant speed or no wind, the equation is solved and the time delay is found. The main part of the solution is analyzed and the analytic signal from it obtained. By using analytic signal, the time delay and time-frequency characteristics of the moving acoustic target are simulated. |
| DOI：10.11684/j.issn.1000-310X.2004.02.007 |
| 中文关键词: 声定位 时频 波动方程 |
| 英文关键词: Acoustic location Time-frequency Wave equation |
| 基金项目: |
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| 摘要点击次数: 2810 |
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