μMote - Enabling Passive Chirp De-spreading and μW-level Long-Range Downlink for Backscatter Devices

Explore a groundbreaking 17-minute conference talk from USENIX NSDI '23 that introduces μMote, a revolutionary technology enabling passive chirp de-spreading and μW-level long-range downlink for backscatter devices. Discover how this innovation overcomes the traditionally limited downlink range of backscatter devices by achieving long-range receiving and low power consumption simultaneously. Learn about the first passive chirp de-spreading scheme for negative SINR in long-range receiving scenarios, and understand how μMote magnifies demodulated signals without consuming external energy. Delve into the μW-level sampling-less decoding scheme that avoids high-power ADC-sampling. Examine the impressive experimental results, showcasing μMote's ability to achieve a 400m receiving range at a 2kbps data rate with 1% BER, under −2dB SINR, while consuming only 62.07μW of power.