Title :
A geometry-based channel model for shallow underwater acoustic channels under rough surface and bottom scattering conditions
Author :
Naderi, Majid ; Patzold, Matthias ; Zajic, Alenka G.
Author_Institution :
Fac. of Eng. & Sci., Univ. of Agder, Grimstad, Norway
fDate :
July 30 2014-Aug. 1 2014
Abstract :
This paper develops a stochastic geometry-based channel model for wideband single-input single-output (SISO) shallow underwater acoustic (UWA) channels under the assumption that the ocean surface and bottom are rough. Starting from a geometrical model, we derive a reference model assuming that the scatterers are randomly distributed on the surface and the bottom of the water. The probability density functions (PDFs) of the angle-of-departure (AOD) and the angle-of-arrival (AOA) of the reference model are analyzed. Furthermore, the two-dimensional (2D) time-frequency correlation function (T-FCF) of the reference model is studied. From the reference model, we then derive the corresponding simulation model by applying the generalized concept of deterministic channel modelling. For the parametrization of the UWA channel simulator, we propose a new method which is further on called the method of equally spaced scatterers (MESS). The performance of the MESS is compared with that of the Lp-norm method (LPNM). It is shown that our design concept results in an excellent match between the T-FCF of the reference model and that of the simulation model. It is also shown that both the MESS and the LPNM have a similar performance, whereby the MESS provides a closed-form solution, while the LPNM does not.
Keywords :
acoustic wave scattering; direction-of-arrival estimation; geometrical acoustics; probability; rough surfaces; stochastic processes; time-frequency analysis; underwater acoustic communication; wireless channels; AOA; AOD; Lp-norm method; LPNM; MESS; PDF; SISO; T-FCF; UWA; angle-of-arrival; angle-of-departure; bottom scattering conditions; closed-form solution; deterministic channel modelling; geometry-based channel model; method of equally spaced scatterers; probability density functions; reference model; rough surface; shallow underwater acoustic channels; two-dimensional time-frequency correlation function; Delays; Nickel; Channel modelling; angle-of-arrival distribution; angle-of-departure distribution; shallow underwater acoustic channels; time-frequency correlation function; underwater acoustic communications; wideband channels;
Conference_Titel :
Communications and Electronics (ICCE), 2014 IEEE Fifth International Conference on
Conference_Location :
Danang
Print_ISBN :
978-1-4799-5049-2
DOI :
10.1109/CCE.2014.6916689