无线能量传输中继选择与发送功率分配方案

刘彤; 廖学文; 高贞贞

doi:10.7652/xjtuxb201904009

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无线能量传输中继选择与发送功率分配方案

更新时间：2025-07-09

- 无线能量传输中继选择与发送功率分配方案
- A Scheme of Relay Selection and Transmission Power Allocation for Wireless Energy Transfer
- 西安交通大学学报 2019年53卷第4期页码：58-64
- 作者机构：
  
  西安交通大学电子与信息工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201904009
  中图分类号： TN925
- 网络首发：2019-04-10，
  
  纸质出版：2019
- 稿件说明：
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刘彤, 廖学文, 高贞贞. 无线能量传输中继选择与发送功率分配方案[J]. 西安交通大学学报, 2019,53(4):58-64.

A Scheme of Relay Selection and Transmission Power Allocation for Wireless Energy Transfer[J]. 2019, 53(4): 58-64.
刘彤, 廖学文, 高贞贞. 无线能量传输中继选择与发送功率分配方案[J]. 西安交通大学学报, 2019,53(4):58-64. DOI： 10.7652/xjtuxb201904009.

A Scheme of Relay Selection and Transmission Power Allocation for Wireless Energy Transfer[J]. 2019, 53(4): 58-64. DOI： 10.7652/xjtuxb201904009.

摘要

为了最大化无线能量传输全双工多中继系统的传输速率

提出一种利用中继采集能量并进行中继选择和发送功率分配方案。首先在最好最差信道和最大调和平均值中继选择基础上

考虑中继自干扰信道能量采集

引入中继节点不同功率约束

提出基于节点功率的最好最差信道中继选择和最大调和平均值中继选择方案; 然后联合源节点两阶段发送功率分配进行优化求解

给出优化问题解耦后的两步次优解方案

求解出功率分配参数的理论次优值; 最后推导得出所提最优中继选择方法的中断概率。仿真结果表明

所提出的中继选择方案比随机选择中继的容量性能在系统中继个数为5时提高了30%以上; 与中继选择等功率分配方案相比

所提分配方案的系统容量提升了10%以上

中断概率在发送信噪比为15 dB时下降了16%。

Abstract

A scheme of relay selection and transmission power allocation with energy harvesting relay is proposed to maximize the transmission rate in the wireless-powered full-duplex(FD)multi-relay system. Bases on the best worse channel and best harmonic mean selection

the best worse channel selection and the best harmonic mean selection with nodes power algorithms is proposed by considering the relay self-interference channel and different power constraints. Then a capacity optimization problem is constructed by jointly considering relay selection and power allocation

and is decoupled into two-step sub-optimal problems to obtain the solution of power allocation parameters. Finally

the outage probability of the optimal relay selection method is derived. Numerical results show that the proposed scheme improves the capacity performance of the system by more than 30% compared with the random selection scheme when the system has 5 relays. A comparison with the equal power allocation scheme shows that the proposed scheme improves the capacity performance by 10% and the outage probability decreases by 16% when the signal to noise ratio is 15 dB.

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Keywords

references

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