Performance Analysis of Dual‐Slot RIS‐DF Cooperative Communication System Based on Hardware Impairments

With the rapid development of communication technology, from simple communication exchange to today’s perceptual integration, communication systems face many challenges. Among these, hardware impairment (HI) is one of the key factors affecting system performance and reliability, often leading to communication interruptions and signal degradation. To address this challenge, this paper proposes a scheme that combines reconfigurable intelligent surfaces (RIS) and decode‐and‐forward relay (DF) techniques for cooperative transmission in dual slot. In this study, for the case where HI exists at both the receiver and transmitter during signal transmission, multiple RISs are divided into two groups, each participating in signal transmission during one of the two time slots. The outage probability (OP) and throughput of the system are further analyzed by constructing a model of the dual‐slot cooperative communication system and deriving an expression for the overall signal‐to‐interference‐plus‐noise ratio (SINR) of the system over a Nakagami‐m fading channel. Numerical simulation results show that the impact of HIs on the communication system is significant and cannot be ignored. In addition, the scheme in which RISs selectively participate in different time slots shows significant advantages over traditional RIS participation in all reflection schemes. Through numerical simulations, we find that the model can significantly reduce system OP and optimize communication system performance. This finding verifies the effectiveness and superiority of the dual time slot RIS‐DF cooperative communication model under HI conditions.