Outage Probability Analysis for MF-RIS Assisted AmBC Networks

This paper focuses on the performance analysis of multi-functional RIS (MF-RIS) assisted ambient backscatter communication (AmBC) networks. To be specific, we derive the closed-form and asymptotic expressions of outage probability for both data signal and backscatter signal with the consideration of imperfect and perfect successive interference cancellation (SIC) process. On this basis, the diversity orders, which are related to the number of MF-RIS elements and levels of imperfect SIC, are also derived. Numerical results indicate that the outage performance of MF-RIS-assisted AmBC networks outperforms that of passive and conventional relaying schemes.