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

作　　者：郭潇瑶 刘超[1] 包建荣[1] 姜斌[1] GUO Xiao-yao;LIU Chao;BAO Jian-rong;JIANG Bin(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou,Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《电子学报》2022年第11期2602-2609,共8页Acta Electronica Sinica

基　　金：国家自然科学基金(No.U1809201);浙江省属高校基本科研业务费专项资金(No.GK209907299001-003);浙江省自然科学基金(No.LY20F010010);浙江省教育厅一般科研项目(No.Y202146870);浙江省大学生新苗人才计划(No.2022R407B064)。

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2.5 dB和5.3 dB.其性能与穷举法相当,二者所需SNR仅相差约0.01 dB.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 is10,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 about2.5dB and5.3dB.Its performance is comparable to that of the exhaustive scheme,and the difference between the two required SNR is only about0.01dB.

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 

分 类 号：TN911[电子电信—通信与信息系统]