Implementación de sistemas receptores de AM, FM y ADS-B usando SDR (SOFTWARE DEFINED RADIO), hardware y software libre

Abstract

This project describes in real applications the potential and flexibility of the Software Defined Radio (SDR) technology, for this purpose the development of different low-cost communications systems using open source hardware and software is shown. As a first step, this project describes the main modulation and demodulation techniques in both amplitude and frequency that will use to implement the receiving systems AM and FM, respectively; the operation of the ADS-B system, its benefits, elements and the protocols used are summarized; the definition, features and architecture of SDR technology is presented. The AM, FM and ADS-B receivers described have been developed using a credit card size computer Raspberry Pi, a laptop, a Ham It Up converter and a RTL-SDR module as hardware platform; on the other hand as software platform is used the distribution Ubuntu, Raspbian, GNU Radio toolkit and the RTL- SDR software and DUMP 1090. The Appendix section describes the implementation of receiving systems AM and FM in GNU Radio, but unlike that described above, all the installation and execution of the respective receptors is done directly on the Raspberry-Pi platform and its operative system Raspbian