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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Passive Detection of Ship-Radiated Acoustic Signal Using Coherent Integration of Cross-Power Spectrum with Doppler and Time Delay Compensations
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Passive Detection of Ship-Radiated Acoustic Signal Using Coherent Integration of Cross-Power Spectrum with Doppler and Time Delay Compensations

机译：使用多普勒和时延补偿的交叉功率谱的相干积分来被动检测船舶辐射声信号

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摘要

Passive sonar is widely used for target detection, identification and classification based on the target radiated acoustic signal. Under the influence of Doppler, generated by relative motion between the moving target and the sonar array, the received ship-radiated acoustic signals are non-stationary and time-varying, which has a negative effect on target detection and other fields. In order to reduce the influence of Doppler and improve the performance of target detection, a coherent integration method based on cross-power spectrum is proposed in this paper. It can be concluded that the frequency shift and phase change in the cross-power spectrum obtained by each pair of data segments can be corrected with the compensations of time scale (Doppler) factor and time delay. Moreover, the time scale factor and time delay can be estimated from the amplitude and phase of the original cross-power spectrum, respectively. Therefore, coherent integration can be implemented with the compensated cross-power spectra. Simulation and experimental data processing results show that the proposed method can provide sufficient processing gains and effectively extract the discrete spectra for the detection of moving targets.
机译：被动声纳被广泛用于基于目标辐射声信号的目标检测，识别和分类。在移动目标与声纳阵列之间的相对运动所产生的多普勒影响下，接收到的舰船辐射声信号是非平稳且随时间变化的，这对目标检测和其他领域产生了负面影响。为了减少多普勒的影响，提高目标检测的性能，提出了一种基于交叉功率谱的相干积分方法。可以得出结论，可以通过时标（多普勒）因子和时间延迟的补偿来校正每对数据段所获得的交叉功率谱中的频移和相位变化。此外，可以分别从原始交叉功率谱的幅度和相位估算时间比例因子和时间延迟。因此，可以利用补偿的交叉功率谱实现相干积分。仿真和实验数据处理结果表明，该方法可以提供足够的处理增益，有效提取离散光谱，用于运动目标的检测。

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