Authors: Sandra Sendra Jaime Lloret Jose M Jimenez Kayhan Zrar Ghafoor
Publish Date: 2016/10/01
Volume: 96, Issue: 4, Pages: 5123-5144
Abstract
Due to the high attenuation of the water at high frequencies underwater communications in freshwater are not being investigated so much Many current underwater communication systems are based on acoustic or optical techniques The use of electromagnetic EM waves in this medium even in short distances increases the bandwidth which definitely implies a great advantage for video delivery Related literature shows that the speed propagation and absorption coefficient in freshwater are independent of the working frequency of the transmitted signals No work shows any temperature dependence with the electromagnetic waves propagation In this paper we study the EM wave’s behavior when we vary the temperature at 24 GHz in underwater freshwater environments We are going to study the signal behavior in this medium in order to deliver video images from the marine fish cages with the purpose of monitoring the fish activity To carry out our study we fix the water conditions and measure the maximum distance as a function of several network parameters such as the working frequency data transfer rate modulations and water temperature Our results show that some combinations of temperature and working frequency generate better results than others Finally we will compare our results with the statements extracted from other worksThis work has been partially supported by the “Ministerio de Ciencia e Innovación” through the “Plan Nacional de I+D+i 2008–2011” in the “Subprograma de Proyectos de Investigación Fundamental”Project TEC201127516 by the postdoctoral Grant “contratación de doctores para el acceso al sistema español de ciencia tecnología e innovación en estructuras de Investigación de la UPV PAID1014” by the“Universitat Politècnica de València” and by the “Programa para la Formación de Personal Investigador—FPI2015S2884” by the“Universitat Politècnica de València”
Keywords: