A backscatter communication technique for low-power internet of things communication

The researchers used circuit modeling, advanced modulation techniques, and polarization diversity to design a MIMO transceiver system for BackCom applications, achieving a spectral efficiency of 2.0 bps/Hz and improving energy efficiency by 40% compared to conventional techniques. Credit: Professor Sangkil Kim from Pusan National University

Backscatter communication (BackCom) is a promising low-power method for the widespread adoption of the Internet of Things (IoT) technologies, where connected devices reflect and modulate existing signals by altering their load impedance, rather than generating signals themselves.

To achieve low bit error rates and high data rates, higher-order modulation schemes such as Quadrature Amplitude Modulation (QAM) …
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