Doppler Method for Identification of Noise Sources on Underwater Moving Target
نویسندگان
چکیده
According to Doppler shift of moving acoustic source signal, a method is proposed for identification of noise sources on underwater moving target with single hydrophone. The weak Doppler shift curves due to target moving are obtained by utilizing high accuracy ST-Chirp-z algorithm. Considering the sources with small frequency interval, high frequency resolution ST-ESPRIT algorithm is used to extract the Doppler shift curves. After curve smoothing with outlier removing and median filtering, the abeam time when noise sources have the nearest distance to hydrophone is estimated by least square method. Locations of multiple noise sources are obtained with the reference point of a beacon at last. The results of experiment in anechoic water tank showed the validity of this new method, and verified its high localization accuracy.
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تاریخ انتشار 2011