Abstract
Sound propagated in an ocean waveguide is greatly influenced by the characteristics of the underwater acoustic channel. Thus, knowledge of the propagation characteristics (i.e., impulse response or Green’s function) is key to various ocean remote sensing applications. Recently a relationship was verified that the waveguide invariant property allows a time-domain Green’s function observed at one location to be extrapolated to adjacent ranges [Song et al., J. Acoust. Soc. Am. 149, 2173–2178 (2021)]. Here, we exploit this relationship to coherently combine the time-domain Green’s function from adjacent ranges to improve the SNR of the multipath impulse response. Numerical simulation results are presented and discussed.
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