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《Journal of Applied Acoustics》 2020-02
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Motion parameters estimation of airborne source from underwater

LIU Kaiyue;PENG Zhaohui;ZHANG Lingshan;WANG Guangxu;State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences;University of Chinese Academy of Sciences;  
The spectrum of airborne source includes broadband continuous spectrum and narrowband line spectrum. The energy of line spectrum is higher than that of continuous spectrum. Compared with underwater sound source, the velocity of airborne source is generally higher and the Doppler shift is more obvious, so it can be used to estimate the motion parameters of airborne source from underwater. Firstly, the instantaneous frequency of the received signal is extracted by time-frequency analysis, and then the extracted instantaneous frequency is fitted with the predicted value by using the non-linear least square method. Then, the motion parameters of the sound source are estimated. Both simulation and experiment can accurately estimate the motion parameters of the sound source. Besides, ranging and positioning of the airborne moving source are successfully performed in the experiment, and the ranging error is less than 15.8%. This parameter estimation method has good applicability under the condition of satisfying a certain signal-to-noise ratio and ensuring sufficient Doppler information.
【Fund】: 国家自然科学基金项目(11674349)
【CateGory Index】: TB56
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