能量收集分布式基站系统的下行射频远端选择

doi:10.19665/j.issn1001-2400.2023.02.008

Abstract

Abstract:

In order to solve the problem of energy shortage,energy harvesting technology has been proposed and widely used in several typical communication systems.The author studies the problem of how to effectively select remote radio frequency units to realize downlink communication in a distributed base-station system with energy harvesting capability.First,an energy harvesting distributed base-station system model is established,which does not rely on external energy sources such as power grids,and only consists of a baseband processing subsystem,energy subsystem,and remote radio frequency subsystem.Second,based on the model,a joint optimization problem covering beamforming,energy sharing,and power allocation is formed with the goal of maximizing the information transmission rate.Since the energy harvesting situation is uncontrollable,two different energy-sharing strategies are proposed,on the basis of which the problem is analyzed mathematically,the optimal power allocation strategy of the system remote radio frequency end is deduced,and then the remote radio frequency end selection algorithm for the system model is summarized.Finally,Monte Carlo simulation is carried out based on the model and algorithm in this paper,and compared with the literature algorithm.Simulation results show that the algorithm proposed in this paper has a good performance in terms of average channel capacity and energy efficiency,and helps to save system power consumption and resources.

Key words: energy harvesting communications, distributed base-station system, remote radio frequency unit, downlink, power allocation

CLC Number:

TN925

HUANG Zhimin, XIAO Kun. Downlink remote radio frequency unit selection for the energy harvesting distributed base-station system[J].Journal of Xidian University, 2023, 50(2): 71-80.

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References 22

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参数	参数值
参数	图2、图3	图4、图5	图6、图7
小区半径/m	400	400	400
单小区RRFU数量N	17	17	17
RRFU天线数M	5	5	5
路径损耗指数α	3	3	3
能量收集速率v_E_,_i/(J·s^-1)	3~E_max	3~E_max	3~E_max
最大能量收集速率E_max/(J·s^-1)	8	8	8~12
RRFU最大功率约束p_max/W	6	6	6

Downlink remote radio frequency unit selection for the energy harvesting distributed base-station system

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