Wireless Channel Design and Optimization Method for 1-bit Programmable Metasurface

In this work, we built an accurate mathematical model of the 1-bit metasurface based on the time-reversal theory. Based on this theory we figure out how the number and the position of transmitters and receivers influence the communication capacity in different areas. We give out the EM manipulation ability difference between the ideal metasurface and the 1-bit quantization metasurface. Meanwhile, we introduce a fast coding optimization algorithm to get the pattern needed for the programable metasurface to establish the stale, efficient, secure connection between the transmitter and the receiver. Theoretical analysis shows that the EM manipulation ability of the 1-bit metasurface can keep pace with the ideal metasurface and it is sufficient to implement passive wireless communication and sensing especially in the inpatient ward, old people's home, classroom, and other indoor living spaces.