Performance Analysis and Power Allocation of Full Duplex Cooperative NOMA System with Imperfect SIC

SHEN Bin; JIANG Hui-lin; DONG Kun-ming

doi:10.12263/DZXB.20220267

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Performance Analysis and Power Allocation of Full Duplex Cooperative NOMA System with Imperfect SIC

PAPERS | 更新时间：2025-12-11

- Performance Analysis and Power Allocation of Full Duplex Cooperative NOMA System with Imperfect SIC
- ACTA ELECTRONICA SINICA Vol. 52, Issue 3, Pages: 792-802(2024)
- 作者机构：
  
  重庆邮电大学通信与信息工程学院，重庆 400065
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20220267
  CLC： TN929.5
- Received：22 March 2022，
  
  Revised：2022-07-28，
  
  Published：25 March 2024
- 稿件说明：
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申滨,蒋慧林,董坤明.非理想干扰消除全双工协作NOMA系统性能分析及功率分配[J].电子学报,2024,52(03):792-802.

SHEN Bin, JIANG Hui-lin, DONG Kun-ming.Performance Analysis and Power Allocation of Full Duplex Cooperative NOMA System with Imperfect SIC[J].Acta Electronica Sinica, 2024, 52(03): 792-802.
申滨,蒋慧林,董坤明.非理想干扰消除全双工协作NOMA系统性能分析及功率分配[J].电子学报,2024,52(03):792-802. DOI：10.12263/DZXB.20220267

SHEN Bin, JIANG Hui-lin, DONG Kun-ming.Performance Analysis and Power Allocation of Full Duplex Cooperative NOMA System with Imperfect SIC[J].Acta Electronica Sinica, 2024, 52(03): 792-802. DOI：10.12263/DZXB.20220267

摘要

随着非正交多址接入（Non-Orthogonal Multiple Access， NOMA）技术的不断发展，协作NOMA （Cooperative Non-Orthogonal Multiple Access， CNOMA）也受到广泛关注.该文研究了由一个基站（Base Station， BS）、一个远端用户和一个近端用户组成的全双工（Full-Duplex， FD）协作NOMA （FD-CNOMA）系统，其中近端用户作为一个FD解码转发中继以传输远端用户的信号.考虑实际情况中存在基站与远端用户有无直接链路两种情况，以及非理想连续干扰消除（Successive Interference Cancellation， SIC）对系统带来的残留干扰问题，该文提出并解决了在该模型下用户的功率分配问题.最后，该文基于此模型给出了中继用户和远端用户的中断概率闭式表达式和遍历速率的近似闭式表达式.理论分析与仿真结果表明，即便存在非理想SIC和自干扰，相对于半双工（Half-Duplex， HD）协作NOMA（HD-CNOMA）和NOMA系统而言，FD-CNOMA系统表现出更好的系统性能.同时，非理想SIC和中继用户自干扰都会对用户性能产生负面影响，且非理想SIC在遍历速率上对HD机制的影响较FD机制更为严重.最后，文中提出的功率分配方法较随机功率分配和固定功率分配分别获得了13%和10%的速率提升.

Abstract

With the development of non-orthogonal multiple access (NOMA) technology

cooperative non-orthogonal multiple access (CNOMA) has received extensive attention. This paper investigates a full-duplex (FD) cooperative NOMA (FD-CNOMA) system

including one base station (BS)

one near user

and one far user

where the near user acts as one FD relay to transmit the signal of the far user. Considering whether there is a direct link between the BS and the far user

and the residual interference caused by imperfect successive interference cancellation (SIC)

the task of user power allocation under this model is also addressed in this paper. Finally

based on this model

we derive the closed-form expression of the outage probability and the average rate of the relay user and the far user. Theoretical analysis and simulation results show that the FD-CNOMA system performs better than the half-duplex (HD) cooperative NOMA (HD-CNOMA) and NOMA systems

even in the presence of imperfect SIC and self-interference. At the same time

both imperfect SIC and relay user self-interference have negative effects on user performance

and the effect of imperfect SIC on the ergodic rate of the HD mechanism is more notable than that of the FD mechanism. Finally

compared with random and fixed power allocation

the proposed power allocation method achieves 13% and 10% system sum-rate improvement respectively.

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Keywords

references

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