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

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

doi:10.12263/DZXB.20220082

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

PAPERS | 更新时间：2025-12-08

- Multi‑Relay Selection and Power Allocation of Low Complexity Amplify‑and‑Forward Cooperation
- ACTA ELECTRONICA SINICA Vol. 50, Issue 11, Pages: 2602-2609(2022)
- 作者机构：
  
  杭州电子科技大学通信工程学院，浙江杭州 310018
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20220082
  CLC： TN911
- Received：13 January 2022，
  
  Revised：2022-07-01，
  
  Published：25 November 2022
- 稿件说明：
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郭潇瑶,刘超,包建荣等.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,et al.Multi‑Relay Selection and Power Allocation of Low Complexity Amplify‑and‑Forward Cooperation[J].ACTA ELECTRONICA SINICA,2022,50(11):2602-2609.
郭潇瑶,刘超,包建荣等.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. DOI： 10.12263/DZXB.20220082.

GUO Xiao-yao,LIU Chao,BAO Jian-rong,et al.Multi‑Relay Selection and Power Allocation of Low Complexity Amplify‑and‑Forward Cooperation[J].ACTA ELECTRONICA SINICA,2022,50(11):2602-2609. DOI： 10.12263/DZXB.20220082.

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.

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.

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references

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