Diseño y desarrollo de un algoritmo de predicción de armónicos e intermodulaciones en la banda de radiodifusión FM, en Riobamba.

Abstract

It was designed and developed a prediction algorithm of harmonic and intermodulations in the FM broadcasting band in Riobamba. A selection of the operating system was made for the implementation of the application, as well as the software for the mathematical analysis to be used through the evaluation of characteristics considering variables such as high level programming language, graphical environment, and support and integration tools with the USRP B210 platform, the methodology used made it possible to determine the general aspects involved in the development and execution of the application within the FM broadcast band between (88-108) MHz, using equipment such as: Spectrum analyzer, FM transmitters of short range, USRP B210 card and the tool of mathematical software, Matlab Simulink allowed to fulfill with the purpose of the application in order to determine the causes and frequencies that produce the problem of harmonic and intermodulations inside the FM broadcasting band analyzing in real-time the signs generated by the radio stations of Riobamba. The results achieved by the application allowed to identify to the possible radio stations that could produce intermediations and the detection of the stations that caused the intermodulations was verified through a controlled environment using the USRP B210 card. The concessionaires of FM stations will be benefited with the application developed, also it will be used to identify harmonics and intermodulations at the Electronic Engineering School in Telecommunications and Networks, facilitating its use for different academic tests. It is recommended that this application is taken into consideration by ARCOTEL for control of FM broadcasting, and thus obtainan optimal signal in the broadcasters.