Poster: A Battery-free Backscatter Communication System for Non-persistent Carriers

We propose a strategy to increase data yield in battery-free backscatter communication systems. Backscatter communication technology relies on ambient radio frequency (RF) signals for low-power wireless transmission. However, the instability of ambient RF signals in diverse environments leads to low data yield and the risk of information loss. Additionally, the reliance of battery-free devices on erratic energy harvesting results in frequent and unanticipated energy failures, causing transmission interruptions. To address these issues, our approach incorporates an RF detector for signal strength detection and integrates non-volatile memory to checkpoint unsent packets during energy failures. The experimental results show that the proposed strategy achieves a high data yield even in scenarios with realistic energy and low carrier availability.