面向OFDM无线中继系统的功率分配算法

doi:10.12305/j.issn.1001-506X.2021.02.28

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (2): 537-545.doi: 10.12305/j.issn.1001-506X.2021.02.28

面向OFDM无线中继系统的功率分配算法

林静然¹(), 陈英¹(), 杨金泰¹(), 张伟^1,^2,*(), 杨健³(), 江志浩⁴()

1. 电子科技大学信息与通信工程学院, 四川成都 611731
2. 电子信息控制重点实验室, 四川成都 610036
3. 北方电子设备研究所, 北京 100191
4. 海军研究院, 北京 100089

收稿日期:2020-06-10 出版日期:2021-02-01 发布日期:2021-03-16
通讯作者: 张伟 E-mail:jingranlin@uestc.edu.cn;1358193951@qq.com;yangjitnai94@163.com;zhanggwei1103@163.com;jyang_niee@outlook.com;jzh1005@163.com
作者简介:林静然(1978-),男,副教授,博士,主要研究方向为大规模无线网的资源分配与效能优化。E-mail:jingranlin@uestc.edu.cn|陈英(1996-),女,硕士研究生,主要研究方向为无线通信信号处理与优化算法设计。E-mail:1358193951@qq.com|杨金泰(1994-),男,硕士,工程师，主要研究方向为无线通信信号处理与优化算法设计。E-mail:yangjitnai94@163.com|杨健(1982-),男,高级工程师，硕士,主要研究方向为通信信号处理、认知电子战。E-mail:jyang_niee@outlook.com|江志浩(1981-),男,高级工程师，硕士,主要研究方向为通信信号处理。E-mail:jzh1005@163.com
基金资助:
国家自然科学基金(61671120);四川省应用基础项目(2008JY0147)

Power allocation algorithm for OFDM wireless relay system

Jingran LIN¹(), Ying CHEN¹(), Jintai YANG¹(), Wei ZHANG^1,^2,*(), Jian YANG³(), Zhihao JIANG⁴()

1. School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
2. Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China
3. Northern Institute of Electronic Equipment of China, Beijing 100191, China
4. Naval Research Academy, Beijing 100089, China

Received:2020-06-10 Online:2021-02-01 Published:2021-03-16
Contact: Wei ZHANG E-mail:jingranlin@uestc.edu.cn;1358193951@qq.com;yangjitnai94@163.com;zhanggwei1103@163.com;jyang_niee@outlook.com;jzh1005@163.com

摘要/Abstract

摘要：

针对正交频分复用无线中继系统的绿色通信问题，提出一种低复杂度功率分配算法。首先，采用“放大-转发”中继策略，源节点在中继传输的两阶段都发送相同信息。然后，通过联合优化源节点和中继节点在各子载波上的传输功率，使系统以最小功耗代价满足用户通信服务质量要求。由于该问题是一个复杂的多变量耦合非凸问题，直接求解难度高。对此，综合运用拉格朗日松弛法和块坐标连续上界最小化方法，通过交替优化各个功率变量，获得原问题的高质量次优解。仿真结果表明，该算法能有效降低中继系统总体功耗，为无线中继系统的绿色通信提供有效解决方案。

关键词: 功率分配, 正交频分复用, 中继系统, 拉格朗日松弛, 块连续上界最小化

Abstract:

Aiming at the green communication problem of orthogonal frequency division multiplexing (OFDM) wireless relay system, a low complexity power allocation algorithm is proposed. Firstly, the relay strategy of amplify and forward is adopted, in which the source node sends the same information in the two stages of relay transmission. Then, by jointly optimizing the transmission power of the source node and the relay node on each subcarrier, the system can meet the quality of service requirements for the user communication with minimum power consumption. Because the problem is a complex multivariable coupled nonconvex problem, it is difficult to solve it directly. To solve this problem, the Lagrange relaxation method and the block coordinate continuous upper bound minimization method are used to optimize each power variable alternately for obtaining the high-quality suboptimal solution of the original problem. The simulation results show that the algorithm can effectively reduce the overall power consumption of the relay system and provide an effective solution for the green communication of the wireless relay system.

Key words: power allocation, orthogonal frequency division multiplexing (OFDM), relay system, Lagrangian relaxation, block successive upper-bound minimization (BSUM)

中图分类号:

TN911.7

林静然, 陈英, 杨金泰, 张伟, 杨健, 江志浩. 面向OFDM无线中继系统的功率分配算法[J]. 系统工程与电子技术, 2021, 43(2): 537-545.

Jingran LIN, Ying CHEN, Jintai YANG, Wei ZHANG, Jian YANG, Zhihao JIANG. Power allocation algorithm for OFDM wireless relay system[J]. Systems Engineering and Electronics, 2021, 43(2): 537-545.

图/表 5

参考文献 25

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面向OFDM无线中继系统的功率分配算法

Power allocation algorithm for OFDM wireless relay system

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