| 声强谱频移补偿的波导不变量和距离估计方法 |
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| 引用本文： | 任云,戚聿波,周士弘,李整林.声强谱频移补偿的波导不变量和距离估计方法[J].声学学报,2014,39(3):319-323. |
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| 作者姓名： | 任云 戚聿波 周士弘 李整林 |
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| 作者单位： | 1. 中国科学院声学所声场声信息国家重点实验室 北京 100190; |
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| 基金项目： | 国家自然科学基金(20121302013,20131308965)资助 |
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| 摘 要： | 基于声强的距离一频率干涉结构,利用对水平阵不同阵元信号的声强谱进行频移补偿的方法估计波导不变量和距离。在波导不变量和距离其中一项已知的情况下,可以通过该方法估计另外一项。利用2011年12月北黄海水声实验中拖曳声源发射和海底水平阵接收的线性调频信号,通过上述方法估计了不同距离处的波导不变量。结果显示波导不变量的估计值在0.8到1.2之间变化,其均值与利用实测海洋环境计算的理论值符合良好。同时,利用相同的信号和波导不变量的理论计算值,通过上述方法在不同时刻进行距离估计,结果与GPS测量距离基本一致。
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| 关 键 词： | 不变量 声强 线性调频信号 声源定位 测量距离 海洋环境 干涉条纹 估计值 脉冲压缩 代价函数 |
| 收稿时间： | 2012-11-07 |
Waveguide invariant and range estimation based on frequency-shift-compensation of underwater acoustic intensity spectrograms |
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| Institution: | 1. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences Beijing 100190;2. University of Chinese Academy of Sciences Beijing 100049 |
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| Abstract: | Based on the sound intensity, a method of frequency-shift-compensation of sound intensity spectrum is used to estimate waveguide invariant and source range. When one of the waveguide invariant and range is known, this method can be used to estimate the other. With this method, waveguide invariants at different ranges are estimated experimentally using LFM signals radiated by one towed sound source and received by one sea-floor located horizontalline-array in the Yellow Sea in December 2011. It is shown that waveguide invariant varies from 0.8 to 1.2, whose mean value is near the theoretical value invariant, which are in agreement On the other hand, ranges are estimated using the theoretical value of the waveguide with the ranges measured by GPS. |
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