**Author details**

agree well. Moreover, for validation purposes, our simulation results are further compared with those obtained by Sahu [14] and good agreement is shown to exist. We believe that the approach presented here provides a general and flexible technique for numerically solving the radiative transfer equation, accessible to any reader with basic programming skills. Besides the conditions simulated in this chapter, the simulation program may be used to simulate innumerous other conditions, like misalignment between receiver and transmitter, smaller aperture sizes,

This work is financed by the ERDF—European Regional Development Fund through the Operational Programme for Competitiveness and Internationalisation —COMPETE 2020 Programme, and by National Funds through the FCT— Portuguese Foundation for Science and Technology, I.P., within project

limited FOVs, and other light sources other than Gaussian beams.

*CIR for various distances in Harbor II waters, where the delay spread is highlighted.*

*Wireless Mesh Networks - Security, Architectures and Protocols*

**Acknowledgements**

**130**

**Figure 27.**

POCI-01-0145-FEDER-031971.

Rafael M.G. Kraemer1,2, Luís M. Pessoa2 and Henrique M. Salgado1,2\*

1 Faculty of Engineering, University of Porto, Portugal

2 INESC TEC—INESC Technology and Science (Formerly INESC Porto), Porto, Portugal

\*Address all correspondence to: henrique.salgado@inesctec.pt

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
