基于极化码的协作NOMA-VLC系统性能研究  

Performance of cooperative NOMA-VLC system based on polar codes

作　　者：官娟帆 郭锐[1] GUAN Juanfan;GUO Rui(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2023年第1期26-33,共8页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：可见光通信(Visible Light Communication,VLC)系统传输质量差,传输速率低,为此,针对基于极化码的协作非正交多址(Non-orthogonal Multiple Access,NOMA)VLC系统,提出一种总速率最大化的动态功率分配算法。首先,在发送端,将极化码与协作传输相结合;其次,在保障用户服务质量的同时,使得系统的总速率最大化;最后,采用串行干扰抵消(Successive Interference Cancellation,SIC)联合串行抵消(Successive Cancellation,SC)进行译码,提高了基于极化码的协作NOMA-VLC系统的传输质量。仿真结果表明,在误码率为10-4时,与NOMA-VLC系统相比,基于极化码的协作NOMA-VLC系统的远端用户得到约为2.8 dB的增益;当信噪比为32 dB时,与基于极化码的协作NOMA-VLC系统采用固定功率分配算法相比,动态功率分配算法的总速率提升了8.8%。Visible light communication(VLC)system has poor transmission quality and low transmission rate.Therefore,aiming at the cooperative non-orthogonal multiple access(NOMA)-VLC system based on polar codes,a dynamic power allocation algorithm with maximum total rate is proposed.Firstly,combines polar codes with cooperative transmission at the transmitting end.Secondly,while ensuring user service quality,the total rate of the system is maximized.Finally,the successive interference cancellation(SIC)combined with the successive cancellation(SC)decoding is used to improve the transmission quality of the cooperative NOMA-VLC system based on polar codes.Simulation results show that when the bit error rate is 10-4,the far-end user in the cooperative NOMA-VLC system based on polar codes obtains a gain of about 2.8 dB compared to the NOMA-VLC system;when the signal-to-noise ratio is 32 dB,the total rate of the dynamic power allocation algorithm is improved by 8.8%compared with the fixed power allocation algorithm used in the cooperative NOMA-VLC system based on polar codes.

关 键 词：NOMA-VLC 极化码 功率分配 协作通信 

分 类 号：TN929.12[电子电信—通信与信息系统]