The design of low-power demodulation circuit for AmBC based on DTMB

Abstract

The emergence of AmBC (Ambient Backscatter Communication) technology makes it possible for IoT (Internet of Things) devices to complete communication with the help of ambient RF signals. With high domestic coverage and strong stability, DTMB (Digital Terrestrial Multimedia Broadcast) signals have natural advantages in combination with AmBC. However, the existing AmBC signal demodulation algorithm based on DTMB requires the receiver to realize analog-to-digital conversion, which is difficult to be applied to low-power IoT devices. Therefore, this paper provides a design scheme of a low-power demodulation circuit, in which the receiver can identify the frame header and frame body of the DTMB signal, select the corresponding comparison threshold and get the digital demodulation signal. Finally, the scheme is verified by simulation.