Annotation
In this paper we demonstrate numerically vertical array output of multimodal acoustical signal, which propagates in randomly inhomogeneous oceanic waveguide. The input signal is sum of normal waves with given wave number spectrum and random amplitudes, which have some (range-dependent) scale of cross-modal correlations. We obtain quantitative estimator of impact basic physical signal characteristics (intensity spectrum of the signal-carrying modes, wave number spectrum, cross-modal correlations) on the array output in different oceanic noise models (continuous and discrete mode spectrum). The results of this work enable to find dependence large array efficiency on multimodal signal’s propagation effect in underwater sound channel.
Received: 2014 November 11
Approved: 2014 December 22
PACS:
43.60.Cg Statistical properties of signals and noise
43.60.Fg Acoustic array systems and processing, beam-forming
43.30.+m Underwater sound
43.60.Fg Acoustic array systems and processing, beam-forming
43.30.+m Underwater sound
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
A.I. Malekhanov
A.V. Smirnov
1) Institute of Applied Physics, Russian Academy of Science, Russia, Nizhny Novgorod, Ul'yanov Street, 46, 603950; N.I. Lobachevsky State University of Nizhny Novgorod, Russia, Nizhny Novgorod, Gagarin Avenue, 23, 603950. 2) Institute of Applied Physics, Russian Academy of Science, Russia, Nizhny Novgorod, Ul'yanov Street, 46, 603950.
1) Institute of Applied Physics, Russian Academy of Science, Russia, Nizhny Novgorod, Ul'yanov Street, 46, 603950; N.I. Lobachevsky State University of Nizhny Novgorod, Russia, Nizhny Novgorod, Gagarin Avenue, 23, 603950. 2) Institute of Applied Physics, Russian Academy of Science, Russia, Nizhny Novgorod, Ul'yanov Street, 46, 603950.