Method for synchronizing and controlling backscatter communication based on ambient cellular ofdm signal

Abstract

A method for synchronizing and controlling backscatter communication based on an ambient cellular OFDM signal includes the following steps: S10, transmitting, by a transmitting terminal, an ambient cellular OFDM signal, which carries synchronization and control information; and S20, acquiring, by a backscatter tag, the synchronization and control information from the ambient cellular OFDM signal, including: utilizing, by the backscatter tag, an envelope-detection circuit to convert the ambient cellular OFDM signal into a digital pulse signal; establishing, by the backscatter tag, synchronization with the transmitting terminal by detecting a rising edge of the digital pulse signal; and identifying, by the backscatter tag, the control information of the transmitting terminal by detecting multi-segment pulse widths of the digital pulse signal.

Dependencies are inferred from the claim text.