Implementación de un sistema SDR para modulación analógica y digital de señales AM, FM y M-PSK utilizando MatLab.

Abstract

The degree work consists of implementing an SDR system for analog and digital modulation of AM, FM, BPSK, QPSK signals and as a BFSK added value using the MatLab and GUIDE simulation platform. In the first part, the introduction of the software-defined radio system (SDR) is carried out, as well as work related to the use of simulation tools in the background part of the degree work. Also, the problem is defined, and the objectives of the investigation. In the second part, the fundamental description of the digital modulations with their respective characteristics and functionalities is made. In the third part, which is the most important part of the work, the design of a graphical user interface (GUIDE) and the programming codes for both analog and digital modulation and demodulation using MatLab was carried out. Also, the results obtained from the SDR system were evaluated, whose results were acceptable and complied with the regulations of wireless communications.