Battery-free Internet-of-Things (BF-IoT), which is realized by harvesting ambient energy to
power the IoT devices, has emerged to reduce the energy consumption, and alleviate …

Technology solutions must effectively balance economic growth, social equity, and
environmental integrity to achieve a sustainable society. Notably, although the Internet of …

WiFi backscatter communication has required unwanted constraints on either excitations or
receivers since its inception eight years ago. We present Chameleon, the first native WiFi …

To piggyback information, the instantaneous-phase shift (IPS) modulation toggles discrete
phases on ambient RF carriers, which is popular with advanced backscatter systems …

We present DanBlue, a commodity Bluetooth backscatter system that can take multi-
frequency signals as excitations. Unlike all prior systems, DanBlue leverages ambient …

Throughput is one of the key performance indicators in backscatter communication systems.
Existing works either have limited throughput or modify the transmitter or receiver to fit the …

The research on backscatter multiple access schemes has been an interesting topic.
Existing schemes in the area of backscatter multiple access are not designed for specific …

OFDM backscatter is crucial in passive IoT. Most of the existing works adopt phase-
modulated schemes to embed tag data, which suffer from three drawbacks: symbol-level …

Low-Power Wide-Area Networks (LPWANs), extensively utilized for connecting billions of
IoT devices, encounter wireless interference challenges in unlicensed frequency bands …

WiFi backscatter has attracted intensive attention because the large population of WiFi
radios can provide plenty of excitation signals. However, WiFi backscatter communication …