Demo: Ambient Backscatter Communication with Convolutional Code based on LTE Pilots

Description

Abstract (English)

Ambient Backscatter Communication (AmBC) is a low power communication technique that reflects or absorbs the ambient signal, i.e., Long Term Evolution (LTE) downlink Cell-specific Reference Signal (CRS). Information of Backscatter Devices (BDs) is conveyed on ambient signal without requiring additional power, which is promising for energy-autonomous devices. In practical scenarios, AmBC works under a severe SNR conditions with low Bit Error Rate (BER). This paper introduces the feasibility of convolutional channel coded AmBC to improve BER performance with LTE CRS assisted. Compared with uncoded modulation, the convolutional channel coding yields approximately 5 dB of gain at a BER of $10^{-2}$. AmBC demonstrates reliability, achieving a BER of $10^{-3}$ at an SNR of 5 dB.