Performance Analysis of Cascaded Reconfigurable Intelligent Surface Networks

Reconfigurable intelligent surfaces (RIS) have been presented as a solution to realize the concept of smart radio environments, wherein uninterrupted coverage and extremely high quality service can be ensured. In this letter, assuming that multiple RIS are deployed in propagation environment, performance cascaded network affected by imperfect phase estimation is evaluated. Specifically, we derive closed-form expressions for outage probability, ergodic capacity average symbol error probability utilized evaluate proposed network, well data transmission accuracy. Finally, validate derived through simulations show choosing number participating correctly, outperform single RIS-aided system extend network’s efficiently.