Diseño e implementación de un enlace de comunicación satelital para trasmisión y recepción de voz y datos, basados en radio amateur en espacio.

Abstract

The present titling project had as main aim to establish a link of communication with a low orbit satellite, using frequencies intended for amateur radio using the experimental development card USRP B210. The research consisted in three stages, the first corresponding to the research in various resources of information about the methods of satellite communication that exists for the transmission of voice and data. This research was based on digital information resources, physical books, and people that are dedicated to operate as radio-amateur which contribute with their valuable experience; the second stage was focused on the design and implementation of the link of the communication based on radio amateur in free space, establishing the parameters and the necessary requirements for the transmission and reception such as: type of information, modulation used, signal strength, losses by means of communication and antenna performance, for this end, a scenario was implemented with the card USRP B210, radio frequency amplifiers, antennas and module RTL-SDR that was considered necessary for the communication, this scenario took place on the roof of a building where there is a direct line of sight with the satellite to avoid losses due to obstruction of objects. In the third stage, it was done a testing of the reception of the message transmitted consisting of analog and digital information through the satellite communication link, this stage is considered as the most important since the original emitted signals were received with an acceptable signal to noise ratio of 8.5 dB, reason why reason for which the proximity and variation of the theoretical design with the practical implementation can be appreciated.