Doppler Elimination Algorithm for Moving Sound Source Position
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摘要: 针对获取运动目标各部位噪声源的位置信息意义重大, 但其辐射噪声存在多普勒效应的问题。介绍了面向阵列接收信号的基于非线性插值运算的解多普勒算法, 包括单通道单聚焦点型, 单通道多聚焦点型和多通道多聚焦点型, 以补偿辐射噪声的多普勒频移和幅度衰减, 从而提高运动目标噪声源识别定位的准确度。外场试验中解多普勒前后的试验结果表明, 该算法能有效消除多普勒效应带来的影响, 提高了噪声源定位的精度。Abstract: It is of great significance to obtain the position information of the noise source of a moving target, but Doppler effect often exists in the radiated noise. This paper proposes nonlinear interpolation based Doppler elimination algorithm for array re-ceived signal, including single channel and single focus type, single channel and multi-focus type, and multi-channel and multi-focus type. The algorithm can compensate Doppler frequency shift and amplitude attenuation of radiated noise, and so improve the identification and position accuracy of noise source of moving target. The results of outside field test before and after using the Doppler elimination algorithm show that this algorithm can effectively eliminate the Doppler effect, and improve the position accuracy of noise source.
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Key words:
- Doppler effect /
- noise source position /
- nonlinear interpolation
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