Research on Ambient Backscatter Communication Signal Detection Algorithm Based on Digital Terrestrial Multimedia Broadcast

Digital Terrestrial Multimedia Broadcast (DTMB) has high signal coverage and strong stability, so it can be used in Ambient Backscatter Communication (AmBC). To solve the problem of signal detection performance degradation of traditional algorithm in high backscattering rate scenes, this paper presents a signal detection algorithm based on DTMB frame structure. By introducing preamble, the receiver can not only detect the reflected link signal from the received signal, but also perceive the corresponding relationships between the information symbol and the DTMB signal frame; by introducing training symbol, the receiver can get the decision threshold of the information symbol, and then complete the demodulation of the information symbol. Simulation results show that the proposed algorithm significantly improves the signal detection performance.