Energy-Efficient Power and Subcarrier Allocation in Downlink OFDMA Systems with Channel Estimation Errors

被引：0

作者：

Liu, Yong ^{[1
]}

Liu, Fei ^{[2
]}

Ren, Fuqiang ^{[3
]}

Hou, Feng ^{[4
]}

Zhu, Yongsheng ^{[1
]}

Wang, Xiaolei ^{[1
]}

Yang, Yaoke ^{[2
]}

机构：

[1] Zhongyuan Univ Technol, Sch Elect & Informat, 41 Zhongyuan Rd, Zhengzhou 450007, Henan, Peoples R China

[2] Zhongyuan Univ Technol, Sch Comp Sci, 41 Zhongyuan Rd, Zhengzhou 450007, Henan, Peoples R China

[3] Shandong Univ, Sch Elect Engn, Jinan, Shandong, Peoples R China

[4] Training Ctr State Grid Ningxia Elect Power Co Lt, Yinchuan, Ningxia, Peoples R China

来源：

WIRELESS COMMUNICATIONS & MOBILE COMPUTING | 2022年 / 2022卷

基金：

中国国家自然科学基金;

关键词：

NETWORKS; OPTIMIZATION; DESIGN;

D O I：

10.1155/2022/8669554

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, we investigate the joint optimization of power and subcarrier allocation for maximizing the energy efficiency (EE) in downlink OFDMA systems. The problem of EE maximization is formulated as a stochastic optimization to determine the optimal power and subcarrier allocation, in which many practical factors including channel estimation errors, delay requirements, and time-varying channel are considered. We first propose a dynamic power and subcarrier allocation (DPSA) algorithm to solve the formulated problem. Then, we derive the two bounds of EE and delay and reveal the tradeoff between them. The theoretical analysis and simulation results demonstrate the variations of EE and delay with channel estimation errors.

引用

页数：9

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