Details

Autor(en) / Beteiligte

• Peng, Zhangjie
• Liu, Xueya
• Liu, Xue
• Pan, Cunhua
• Chen, Xianzhe
• Ren, Hong

Titel

Performance analysis of active RIS-aided multi-pair full-duplex communications with spatial correlation and imperfect CSI

Ist Teil von

• Science China. Information sciences, 2023-09, Vol.66 (9), p.192304, Article 192304

Ort / Verlag

Beijing: Science China Press

Erscheinungsjahr

2023

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• This paper investigates a multi-pair full-duplex (FD) communication system aided by an active reconfigurable intelligent surface (RIS) with spatial correlation and imperfect channel state information (CSI). We apply the linear minimum mean square error (LMMSE) method to estimate the cascaded user-RIS-user channel. The approximation for the sum achievable rate (ACR) is derived in closed form over correlated Rician fading channels. To provide insights in a poor-scattering environment, the sum ACR limits are also given when the Rician factors grow infinite. Subsequently, a method based on a genetic algorithm (GA) is designed for the sum ACR maximization considering the cases of continuous and discrete phase shifts. Simulation results validate the derived results, and present that the sum ACRs in the active RIS system are higher than the passive counterparts with the same power consumption, which indicates the superiority of the active RIS in overcoming the “multiplicative fading” effect.