面向工业物联网场景下行短包传输的叠加导频功率优化  

Power optimization of superimposed pilot for downlink short-packet transmission in IIoT

作　　者：夏文超 徐婧[1,2] 周星光 吴伟华 赵海涛 XIA Wenchao;XU Jing;ZHOU Xingguang;WU Weihua;ZHAO Haitao(College of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Jiangsu Provincial Key Laboratory of Wireless Communications,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学江苏省无线通信重点实验室,江苏南京210003 [3]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《物联网学报》2024年第2期16-25,共10页Chinese Journal on Internet of Things

基　　金：国家自然科学基金青年基金项目(No.62201285);江苏省前沿引领技术基础研究专项项目(No.BK20212001);中国博士后科学基金面上项目(No.2022M722669);青年人才托举工程(No.2022QNRC001)。

摘　　要：工业物联网在实现自动化和智能化生产方面具有巨大的潜力,但现有无线网络难以满足工业控制场景中的低时延、高可靠通信需求。基于此,研究了工业物联网下行短包传输场景中叠加导频(superimposed pilot,SP)功率分配问题,推导了可达传输速率在非完美信道状态信息和最大比发送下的闭合表达式的下限。进一步建立了下行加权和速率最大化问题,并利用逐次凸逼近法将该问题转化为几何规划问题来优化导频和数据功率分配。仿真结果表明所提SP模式下功率优化方案在短包传输中的优越性。The industrial internet of things(IIoT)has great potential in achieving automation and intelligent production.However,existing networks struggle to meet the low-latency and high-reliability communication requirements in indus‐trial control scenarios.Motivated by this fact,the power allocation problem of superimposed pilot(SP)for downlink short-packet transmission in IIoT was studied and a lower bound for achievable transmission rates with imperfect channel state information and maximum ratio transmission was derived.Furthermore,the downlink weighted sumrate maximiza‐tion problem was formulated and transformed into a geometric programming problem aiming to optimize pilot and data power allocation via successive convex approximation method.Simulation results demonstrate the superiority of the pro‐posed power optimization scheme of SP in short-packet transmission.

关 键 词：工业物联网 叠加导频 短包传输 功率分配 

分 类 号：TN92[电子电信—通信与信息系统]