Active reconfigurable intelligent surface (ARIS) is a promising way to compensate for multiplicative fading attenuation by amplifying and reflecting event signals to selected users. This paper investigates the performance of ARIS assisted non-orthogonal multiple access (NOMA) networks over cascaded Nakagami-m fading channels. The effects of hardware impairments (HIS) and reflection coefficients on ARIS-NOMA networks with imperfect successive interference cancellation (ipSIC) and perfect successive interference cancellation (pSIC) are considered. More specifically, we develop new precise and asymptotic expressions of outage probability and ergodic data rate with ipSIC/pSIC for ARIS-NOMA-HIS networks. According to the approximated analyses, the diversity orders and multiplexing gains for couple of non-orthogonal users are attained in detail. Additionally, the energy efficiency of ARIS-NOMA-HIS networks is surveyed in delay-limited and delay-tolerant transmission schemes. The simulation findings are presented to demonstrate that: i) The outage behaviors and ergodic data rates of ARIS-NOMA-HIS networks precede that of ARIS aided orthogonal multiple access (OMA) and passive reconfigurable intelligent surface (PRIS) aided OMA; ii) As the reflection coefficient of ARIS increases, ARIS-NOMA-HIS networks have the ability to provide the strengthened outage performance; and iii) ARIS-NOMA-HIS networks are more energy efficient than ARIS/PRIS-OMA networks and conventional cooperative schemes.

翻译：有源可重构智能表面（ARIS）通过放大并反射信号至选定用户，为补偿乘性衰落衰减提供了一种有前景的方案。本文研究了在级联Nakagami-m衰落信道下ARIS辅助的非正交多址接入（NOMA）网络性能。考虑了硬件损伤（HIS）和反射系数对采用非理想连续干扰消除（ipSIC）与理想连续干扰消除（pSIC）的ARIS-NOMA网络的影响。具体而言，针对ARIS-NOMA-HIS网络，我们推导了ipSIC/pSIC条件下中断概率和遍历数据速率的新精确表达式及渐近表达式。基于近似分析，详细获得了非正交用户对的分集阶数与复用增益。此外，在时延受限与时延容忍传输方案下评估了ARIS-NOMA-HIS网络的能量效率。仿真结果表明：i）ARIS-NOMA-HIS网络的中断性能与遍历数据速率优于ARIS辅助的正交多址接入（OMA）及无源可重构智能表面（PRIS）辅助的OMA；ii）随着ARIS反射系数的增大，ARIS-NOMA-HIS网络能够提升中断性能；iii）ARIS-NOMA-HIS网络的能量效率优于ARIS/PRIS-OMA网络及传统协作方案。