Diseño de una GUI en MATLAB para evaluar técnicas de modulación de amplitud en cuadratura (QAM).

Abstract

The work presents the description of the design of a Graphical User Interface (GUI) in MATLAB that allows evaluating Quadrature Amplitude Modulation (QAM) techniques through the modeling of uniform and non-uniform constellations. The generalities of digital communication systems, multi-carrier systems based on the Orthogonal Frequency Division Multiplexing (OFDM) technique and an analysis of Quadrature Amplitude Modulation as the theoretical basis of the design are exposed. The use of the MATLAB GUIDE tool for the development of the graphic environment is based. The functionalities of the GUI are detailed and the results obtained are shown. Finally, the comparison of the obtained results with the theoretically expected ones is made, guaranteeing in this way, the correct operation of the application. It uses the method of documentary and scientific observation to obtain the necessary information and define the problem, the exploratory and descriptive method when exploring and describing the characteristics of multi-carrier systems based on the OFDM and QAM techniques through their State of the Art. In addition, it is an "EMPIRICAL-ANALYTIC" paradigm with a "QUANTITATIVE" approach because mathematical calculations are used to design the GUI in Matlab with the desired functionalities and "EXPERIMENTAL", because the study variables are altered, to analyze the results.