Iterative Interference Cancellation for Non-orthogonal Multiple Access System

被引：5
|
作者：
Chen Min [1 ,2 ]
Yang Yongqin [1 ,2 ]
机构：
[1] Hainan Univ, Sch Informat & Commun Engn, Haikou 570228, Hainan, Peoples R China
[2] State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China
来源：
CHINESE JOURNAL OF ELECTRONICS | 2020年 / 29卷 / 03期
关键词：
Non-orthogonal multiple access; Successive interference cancellation (SIC); Iterative SIC and parallel interference cancellation; Max-Log-MAP;
D O I：
10.1049/cje.2020.03.009
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Non-orthogonal multiple access (NOMA) makes multiple users to overload the same wireless resources by utilizing the superposition coding principle, so that it can improve the system capacity and spectral efficiency. Various NOMA schemes are proposed, including the Power-domain NOMA (PD-NOMA). Most of them are using Successive interference cancellation (SIC) for detection, which limits the promised performance gain brought by NOMA due to the error propagation. An Iterative SIC and parallel interference cancellation (ISP) method is proposed for the PD-NOMA system. The MaxLog-MAP (MLM) algorithm (MAP is short for Maximum a posteriori) and SIC are used for performance comparison. Simulation results show that the Bit error rate (BER) performance of ISP is much better than that of SIC, and is close to that of MLM. It can perform even better than MLM at low signal to noise ratio for the user with lower power allocation. The ISP can obtain the promised performance gain brought by NOMA.
引用
收藏
页码：540 / 546
页数：7
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