Low Bitrate Ambient FM Backscattering for Low Cost and Low Power Sensing

摘要

Backscatter radio communication (RFIDs) offers low cost and low power wireless sensors. Ambient backscatter is the new next novel approach for extremely low power communication. Using existing ambient signals for communication, the communication scheme is simplified only to a sensor-node and a receiver circuit. In this work is presented a wireless tag using FM signals for backscatter communication. The receiver consists of a commercial low-cost RTL SDR connected to a computer and a algorithm from signal processing. The tag has been demonstrated in an indoor laboratory setup using the most powerfull FM station.