COVERAGE ANALYSIS IN WIRELESS VIDEO SURVEILLANCE SYSTEMS IEEE 802.11B/G/N

Abstract

In this article, it is proposed to obtain a calculation method for the estimation of losses in wireless communication systems that use the 802.11b/g/n standards, specifically in security systems in indoor environments. The instrumentation used in the investigation (signal generator and spectrum analyzer) led to subsequent measurements, for which different scenarios were designed to imitate the approximate behavior of the real video surveillance system. Starting from an individual analysis of the measurements in each of the test environments, through the graphic representation of the losses obtained from the measurements taken, a comparison was made with certified empirical propagation models, based on ITU recommendations and the proposed model (obtained with the curve fitting method), allowing to know which of these theoretical models best fits the reality of the designed scenarios. The results obtained from the analysis showed that curve fitting is a possible method for predicting coverage behavior in indoor environments. In the case of this research, based on the mathematical models provided by the Curve Expert Professional software, the resulting model presents an acceptable level of accuracy, compared to the models taken by the UITR P.1238 recommendation in almost all scenarios.