不完全SIC下CR-NOMA系统的功率分配算法

doi:10.19678/j.issn.1000-3428.0059060

计算机工程 ›› 2021, Vol. 47 ›› Issue (8): 195-200,209. doi: 10.19678/j.issn.1000-3428.0059060

不完全SIC下CR-NOMA系统的功率分配算法

周烁^1,2, 仇润鹤^1,2

1. 东华大学信息科学与技术学院, 上海 201620;
2. 数字化纺织服装技术教育部工程研究中心, 上海 201620

收稿日期:2020-07-27 修回日期:2020-09-07 发布日期:2020-08-28
作者简介:周烁(1996-),男,硕士研究生,主研方向为认知无线电、非正交多址接入;仇润鹤,教授、博士。
基金资助:
国家自然科学基金（61671143）。

Power Allocation Algorithm of CR-NOMA System Under Imperfect SIC

ZHOU Shuo^1,2, QIU Runhe^1,2

1. College of Information Sciences and Technology, Donghua University, Shanghai 201620, China;
2. Engineering Research Center of Digitized Textile & Apparel Technology, Ministry of Education, Shanghai 201620, China

Received:2020-07-27 Revised:2020-09-07 Published:2020-08-28

摘要/Abstract

摘要： 在不完全连续干扰消除（SIC）条件下，对认知无线电-非正交多址混合系统中的次用户总传输速率进行研究，提出一种基于参数变换和KKT条件的功率分配算法。采用非正交多址方式使次用户接入授权信道，在主次用户服务质量、最大发射功率等约束条件下，通过参数变换对原约束条件进行改写设计新的优化问题，并利用KKT条件求解最优功率分配因子进而实现系统中次用户总传输速率的最大化。仿真结果表明，与CNPA算法和等功率分配算法相比，该算法可明显提高系统中次用户的总传输速率，并且对于不完全SIC具有更强的承受能力。

关键词: 非正交多址接入, 认知无线电, 连续干扰消除, 功率分配, 服务质量

Abstract: This paper presents a study on the total transmission rate of secondary users in a Cognitive Radio(CR) Non-Orthogonal Multiple Access(NOMA) hybrid system under imperfect Successive Interference Cancellation(SIC). On this basis, a power allocation algorithm based on parameter transformation and KKT conditions is proposed. In this system, the secondary users use NOMA to access the authorized channel. Considering the constraints of the primary and secondary users' Quality of Service(QoS) and maximum transmission power, the original constraint conditions are rewritten by using the parameter transformation method to construct a new optimization problem. The optimal power allocation factor is solved by using KKT conditions in order to maximize the total transmission rate of secondary users in the system. Simulation results show that compared with the CNPA algorithm and the equal power allocation algorithm, this algorithm can significantly improve the total transmission rate of secondary users in the system, and has a better tolerance for imperfect SIC.

Key words: Non-Orthogonal Multiple Access(NOMA), Cognitive Radio(CR), Successive Interference Cancellation(SIC), power allocation, Quality of Service(QoS)

中图分类号:

TN929

周烁, 仇润鹤. 不完全SIC下CR-NOMA系统的功率分配算法[J]. 计算机工程, 2021, 47(8): 195-200,209.

ZHOU Shuo, QIU Runhe. Power Allocation Algorithm of CR-NOMA System Under Imperfect SIC[J]. Computer Engineering, 2021, 47(8): 195-200,209.

https://www.ecice06.com/CN/Y2021/V47/I8/195

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