Implementação de um sistema RDID baseado em rádio definido por sortware.

Abstract

This work has as its main focus the development and description of a RFID system based on Software Defined Radio (SDR) operating in the UHF band for this type of application. To introduce the feasibility of applying, important observations are made about the theory behind these systems. RFID technology has a growing number of adepts as well as a large volume of research following different lines. The Software Defined Radio becomes an everyday widely used tool in Telecommunications, appearing as a solution when there is a need for flexibility and adaptation. The combination of RFID and SDR technologies has precisely meet these characteristics, which, among other options, can be exploited mainly for testing, research and improvement of current systems. In designing the system presented, we used the USRP, which is a SDR platform, along with its programming tool, GNU Radio. Another question that requires attention is the correct choice of the antenna for RFID applications. The project also included the construction of an antenna with specific characteristics for RFID application. Finally, the results are presented showing the satisfactory performance of the system while reading commercial tags, operating with the expected flexibility.