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Mathematical Problems in Engineering
Volume 2016, Article ID 5178136, 7 pages
http://dx.doi.org/10.1155/2016/5178136
Research Article

Research on Maritime Radio Wave Multipath Propagation Based on Stochastic Ray Method

1College of Information Science & Technology, Hainan University, 58 Renmin Avenue, Haikou, Hainan 570228, China
2FITM, City University of Macau, Choi Kai Yan Building, Taipa, Macau

Received 24 January 2016; Revised 8 May 2016; Accepted 22 May 2016

Academic Editor: Yuri Vladimirovich Mikhlin

Copyright © 2016 Han Wang and Wencai Du. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Multipath effect in vessel communication is caused by a combination of reflections from the sea surface and vessels. This paper proposes employing stochastic ray method to analyze maritime multipath propagation properties. The paper begins by modeling maritime propagation environment of radio waves as random lattice grid, by utilizing maximum entropy principle to calculate the probability of stochastic ray undergoing k time(s) reflection(s), and by using stochastic process to produce the basic random variables. Then, the paper constructs the multipath channel characteristic parameters, including amplitude gain, time delay, and impulse response, based on the basic random variables. Finally, the paper carries out a digital simulation in two-dimensional specific fishery fleet model environment. The statistical properties of parameters, including amplitude response, probability delay distribution, and power delay profiles, are obtained. Using these parameters, the paper calculates the root-mean-squared (rms) delay spread value with the amount of 9.64 μs. It is a good reference for the research of maritime wireless transmission rate of the vessels. It contributes to a better understanding of the causes and effects of multipath effect in vessel communication.