Relacks: Reliable Backscatter Communication in Indoor Environments
summary
A closed-loop bistatic backscatter system is built with BLE transceivers and BLE-compatible tags plus an FPGA tag and a wake-up receiver, and it selects frequency, antenna and wake-up source based on measured channel scores. In several multipath-rich indoor deployments it achieves communication across a ~50m^2 area, reaches an 81% average success rate, and delivers a 2.7x improvement vs random selection while meeting FCC power limits.
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