Multi-User Connection Performance Assessment of NOMA Schemes for Beyond 5G  

作　　者：Baoxi Wang Chunlin Yan Wei Liu Hailin Zhang 

机构地区：[1]School of telecommunication engineering,Xidian University,Xi’an 710071,Shannxi China [2]CETC advanced mobile communication innovation center,Shanghai 200331,China [3]The 50th research institute of China electronics technology group corporation,Shanghai 200331,China [4]The 7th research institute of China electronics technology group corporation,Guangzhou 510310,China

出　　处：《China Communications》2020年第12期206-216,共11页中国通信（英文版）

基　　金：This work has been performed in the Project“Key technologies for 5G transmission and networking for industry applications”supported by Department of Science and Technology of Guangdong Province(2018B010114001).

摘　　要：Non-orthogonal multiple access(NOMA)is proved to be useful to satisfy the requirements of beyond 5th generation such as massive multi-user connection.Here we compare the performances of two NOMA schemes:low code rate spreading(LCRS)scheme and interleaver division multiple access(IDMA)scheme.It is found that LCRS is superior to IDMA when number of users is small due to coding gain achieved.While IDMA is preferred when number of users is high because repetition applied in IDMA can suppress multi-user interference effectively.And interleaver is important in IDMA for randomizing the interference.Also,this paper evaluates the impact of channel decoder.It is observed that Log-MAP decoder has much better performance than that of Max-Log-MAP when number of users is large.Thus,it is recommended to use Log-MAP decoder in NOMA in high user overloading case.We also compared the performance of NOMA by using different type of channel codes.We find that NOMA using specific convolutional code has a better performance than that of using specific LDPC code when number of users is high.

关 键 词：NOMA multi-user connection LCRS IDMA iterative receiver channel coding 

分 类 号：TN929.5[电子电信—通信与信息系统]