Simple Low Cost Open Source UHF RFID Reader

In this work, we present a simple low-cost software-defined radio (SDR) based reader that can realize a complete inventory of a UHF RFID tag in real time. This paper is a direct continuation of the initial design presented in [1]. The reader is theoretically capable of generating any commands defined by the EPC Gen2 RFID protocol and processing tag response in real time. Compared to other designs [2], all tasks specific to the protocol (including clock recovery, data recovery, frame detection, etc.) are defined entirely in software and can be successfully processed by a single low-performance micro-controller. and All relevant design files (including schematic, PCB and firmware source code) will be released as open source to the community.