一种基于IDMA的非正交多用户检测方法  

A non-orthogonal multiuser detection method based on IDMA

作　　者：陈敏[1,2] 李晖[1] 杨永钦[1,2] 

机构地区：[1]海南大学信息科学技术学院,海南海口570228 [2]海南大学南海海洋资源利用国家重点实验室,海南海口570228

出　　处：《广西大学学报（自然科学版）》2017年第6期2223-2229,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(61501151;61661018);海南省自然科学基金资助项目(20166215);海南省教育厅高等学校科学研究项目(Hnky2016ZD-5);海南省重点研发计划项目(ZDYF2016010)

摘　　要：为了提高系统容量、频谱效率和传输速率,针对第五代通信网络业界提出了功率域非正交多址接入PDNOMA方式,通过功率域叠加复用增加用户接入数量,并且通过串行干扰消除SIC来检测用户信号。SIC算法简单,但性能一般,随着叠加的用户个数的增加,系统的性能会大大下降。交织多址接入IDMA可以采用特定的交织器来分离各用户,并允许使用低复杂度迭代多用户检测技术。为了提高性能,结合基于IDMA的非正交多用户系统和PDNOMA在接收端提出一种迭代检测方法 ISICPIC。仿真表明ISICPIC适用于多用户同时传输的情况,系统性能较好且不会随着用户数的增加而下降。In order to improve system capacity,spectrum efficiency and transmission rate,a power domain non-orthogonal multiple access（ PDNOMA） method is proposed for the fifth generation communication network, which is to increase the number of user access by power domain multiplexing,and to detect the user signals by successive interference cancellation（ SIC）. SIC is simple but its performance decreases as the number of users increases. Interleave division multiple access（ IDMA） can simply separate users by employing user-specific inter-leavers,and allow the use of a low-complexity iterative multi-user detection technique. For the purpose of performance improvement,combined the PDNOMA and non-orthogonal multi-user system based on IDMA,an iterative successive interference cancellation parallel interference cancellation（ ISICPIC） methodis proposed for the multi-user detection at the receiver. The simulation results show that ISICPIC method is suitable for multi-user transmission,and its performance is better than that of SIC.

关 键 词：非正交多址接入 交织多址接入 多用户检测 

分 类 号：TN911.23[电子电信—通信与信息系统]