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：主动式可重构智能表面通过放大并反射事件信号至选定用户，是补偿乘性衰落衰减的有效手段。本文研究了级联Nakagami-m衰落信道下ARIS辅助非正交多址接入网络的性能，分析了硬件损伤和反射系数对采用非理想连续干扰消除与理想连续干扰消除的ARIS-NOMA网络的影响。具体而言，针对ARIS-NOMA-HIS网络，我们推导了含ipSIC/pSIC的中断概率和遍历数据速率的精确与渐近新表达式。根据近似分析，详细获得了非正交用户对的分类阶和复用增益。此外，在延迟受限和延迟容忍传输方案下，评估了ARIS-NOMA-HIS网络的能量效率。仿真结果表明：(i) ARIS-NOMA-HIS网络的中断性能和遍历数据速率优于ARIS辅助正交多址接入和被动式可重构智能表面辅助OMA；(ii) 随ARIS反射系数增大，ARIS-NOMA-HIS网络能提供增强的中断性能；(iii) ARIS-NOMA-HIS网络比ARIS/PRIS-OMA网络及传统协作方案具有更高能效。