Abstract
When the velocity of a moving source is much smaller than the sound velocity of the waveguide, the acoustic field generated by this moving source can be represented in terms of normal modes with different Doppler‐shifted frequencies and, hence, different changes of modal eigenvalues. Using these Doppler's shifts, matched‐mode processing schemes for estimating the frequency, velocity, depth, and range information of a time‐harmonic point source moving uniformly in stratified oceanic waveguides has been presented [H. Y. Chen and I. T. Lu, J. Acoust. Soc. Am. Suppl. 1 87, S153 (1990)]. The processing schemes over time domain is especially promising because only one receiver is required. Here, an iterative algorithm to reduce the monitoring time is used [A. Papoulis, IEEE Trans. Circuits Sys. 25, 735–742 (1975)], which is essential in practical applications. The central problem here is to determine the frequency spectrum F(ω) of measured data f(t) only known in finite time interval. Due to finite Doppler shif...
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