低复杂度放大转发多中继选择及功率分配

doi:10.12263/DZXB.20220082

电子学报 ›› 2022, Vol. 50 ›› Issue (11): 2602-2609.DOI: 10.12263/DZXB.20220082

低复杂度放大转发多中继选择及功率分配

郭潇瑶, 刘超, 包建荣, 姜斌

杭州电子科技大学通信工程学院，浙江杭州 310018

收稿日期:2022-01-13 修回日期:2022-07-01 出版日期:2022-11-25
- 通讯作者:
- 包建荣
- 作者简介:
- 郭潇瑶　男，1997年生于浙江宁波.现为杭州电子科技大学通信工程学院硕士研究生.主要研究方向为协作通信和极化编码等.E-mail: 1040914334@qq.com
  刘超　男，1977年生于湖北武汉.现为杭州电子科技大学副教授，硕士生导师.主要研究方向为无线通信和计算机通信网络等.E-mail: liuchao@hdu.edu.cn
  包建荣（通讯作者）　男，1978年生于浙江杭州. 现为杭州电子科技大学教授，博士生导师.主要研究方向为空间通信、协同信息论与编码、无线AI等.
  姜斌　男，1980年生于浙江衢州.现为杭州电子科技大学高级实验师，硕士生导师.主要研究方向为空间无线通信和无线传感器网络等.E-mail: jiangbin@hdu.edu.cn
- 基金资助:
- 国家自然科学基金 (U1809201); 浙江省属高校基本科研业务费专项资金 (GK209907299001-003); 浙江省自然科学基金 (LY20F010010); 浙江省教育厅一般科研项目 (Y202146870); 浙江省大学生新苗人才计划 (2022R407B064)

Multi‑Relay Selection and Power Allocation of Low Complexity Amplify‑and‑Forward Cooperation

GUO Xiao-yao, LIU Chao, BAO Jian-rong, JIANG Bin

School of Communication Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China

Received:2022-01-13 Revised:2022-07-01 Online:2022-11-25 Published:2022-11-19
- Corresponding author:
- BAO Jian-rong

摘要/Abstract

摘要：

为了解决传统多中继选择协作通信网络算法复杂度高、资源利用率低等问题，本文提出了低复杂度放大转发多中继选择及其功率分配方案.它先利用修正的选择函数选择最优中继集合，再采用改进的低复杂度功率分配方案，对选择的中继集合功率分配.所提方案考虑到等功率分配时，分配功率应随中继数不同而改变，添加修正因子以充分利用功率资源.同时，所提功率分配避免了超越方程求解，极大降低了计算复杂度.仿真表明：当中断概率为10^-4时，所提方案相对于现有预选择单中继放大转发（pre-select Single relay Amplify-and-Forward，SAF）和全中继放大转发（All relay Amplify-and-Forward，AAF）方案，所需信噪比（Signal-to-Noise Ratio，SNR）分别降低约2.5dB和5.3dB.其性能与穷举法相当，二者所需SNR仅相差约0.01dB.

关键词: 低算法复杂度, 放大转发, 多中继节点选择, 功率分配, 中断概率, 协作通信

Abstract:

To solve high complexity and low resource utilization of traditional multi relay selection cooperative communication networks. A low complexity amplify-forward multi relay selection and its power allocation scheme are proposed. It uses a modified selection function to select the optimal relay set, and then uses an improved low-complexity power allocation scheme for power allocation to the selected set. The proposed scheme considers that the power allocation varies with the number of relays under equal power allocation conditions, and adds a correction factor to fully utilize the power resources. Simultaneously, it avoids solving the transcendence equation of power allocation to reduce the computational complexity. The simulation shows that when the bit error rate is 10^-4, compared with the pre-select single relay amplify-and-forward (SAF) and all relay amplify-and-forward (AAF) schemes, the proposed scheme reduces the required signal-to-noise ratio (SNR) by about 2.5 dB and 5.3 dB. Its performance is comparable to that of the exhaustive scheme, and the difference between the two required SNR is only about 0.01 dB.

Key words: low algorithm complexity, amplify-forward, multi-relay node selection, power allocation, outage probability, cooperative communication

中图分类号:

TN911

郭潇瑶, 刘超, 包建荣, 姜斌. 低复杂度放大转发多中继选择及功率分配[J]. 电子学报, 2022, 50(11): 2602-2609.

GUO Xiao-yao, LIU Chao, BAO Jian-rong, JIANG Bin. Multi‑Relay Selection and Power Allocation of Low Complexity Amplify‑and‑Forward Cooperation[J]. Acta Electronica Sinica, 2022, 50(11): 2602-2609.

图/表 6

图1 多节点放大转发中继协作网络模型

图2 不同中继协作数的中断概率理论值与仿真值比较

图3 等功率分配下所提选择方案与不同中继协作数的中断概率比较

图4 等功率分配下不同选择方案的中断概率曲线

图5 不同中继协作数经三种功率分配方案后的中断概率

图6 不同选择方案功率分配后的中断概率曲线

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低复杂度放大转发多中继选择及功率分配

Multi‑Relay Selection and Power Allocation of Low Complexity Amplify‑and‑Forward Cooperation

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