Multi-antenna Tag Ambient Backscatter System Based on Clustering Analysis

Abstract

Ambient backscatter technology can effectively solve the energy problems of communication and battery-free equipment. The ambient backscatter communication system uses a single antenna tag for communication and carries out signal detection at the cost of reducing the communication rate. In order to solve the problem that the single-antenna tag ambient backscatter communication system is not suitable for real-time scenarios, a multi-antenna tag ambient backscatter communication system model was designed. The model uses multiple antennas to communicate at the same time to improve the communication rate, and in order to reduce the interference between tags, the three-antenna label uses dual-band operation. That is the energy collection antenna is intended to work in the 415 MHz band, and the data communication antenna is intended to work in the 825 MHz band to reduce the interference between the two antennas. An improved K-Means clustering analysis (K-Means-Q) algorithm was proposed for signal detection. The simulation results show that the communication rate of the system model proposed in this paper was doubled. Two signal detection algorithms of multi-antenna tag ambient backscatter communication system in multi-antenna tag were compared, and the performance of the algorithm was verified.

Keywords

• ambient backscatter
• k-means-q
• multi-antenna tag
• signal detection