基于短距离环境反向散射的有效功率控制策略  

Effective Power Control Strategy Based on Short-range Backscattering

作　　者：郭金伟 杜渂 陈琪美 胡珍珍 GUO Jinwei;DU Wen;CHEN Qimei;HU Zhenzhen(China Information and Communication Technology Group Co.,Ltd.,Wuhan 430205,China;The First Research Institute of Telecommunications Science and Technology Co.,Ltd.,Shanghai 200032,China;School of Electronic Information,Wuhan University,Wuhan,430072,China;College of Communication Engineering(College of Microelectronics),Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]中国信息通信科技集团有限公司,湖北武汉430205 [2]电信科学技术第一研究所有限公司,上海200032 [3]武汉大学电子信息学院,湖北武汉430072 [4]成都信息工程大学通信工程学院(微电子学院),四川成都610225

出　　处：《无线电通信技术》2024年第6期1229-1237,共9页Radio Communications Technology

基　　金：国家自然科学基金(62101076);上海市“科技创新行动计划”(22QB1400200)。

摘　　要：提出了一种基于短距离环境反向散射传输的功率控制策略,该策略独特地绕过了传统功率控制策略的需求,即估计所有通信用户的信道状态信息(Channel State Information,CSI),可利用环境反向散射通信(Ambient Backscatter Communication,AmBC)的短距离传输特性,只需位于AmBC距离内的主要用户(Primary User,PU)反馈CSI,显著降低了信道信息反馈的复杂度和资源消耗,同时保证了所有主要用户免受次级用户的干扰。在此基础上,进一步整合了现有基于最近K个主要用户的功率控制策略,提出功率控制策略切换模式,能够根据通信环境的变化选择合适的功率控制策略,灵活应对不同通信需求。成功推导出在Nakagami-m信道模型下,主要用户和次级用户(Secondary User,SD)中断概率的准确闭式解,以及在高信噪比条件下的渐进中断概率和能量效率。仿真结果证实,相比传统方法,提出的基于短距离环境反向散射传输的功率控制策略及其切换模式,在降低中断概率和提高能量效率方面表现出显著优势,体现了其在无线通信领域的创新性和实用价值。This study proposes a power control strategy based on short-range ambient backscatter transmission,uniquely circumventing traditional requirement of estimating all the users’Channel State Information(CSI).Its advantage lies in utilizing short-range transmission characteristics of Ambient Backscatter Communication(AmBC),requiring only the Primary User(PU)within the backscatter communication range to feedback CSI.This significantly reduces the complexity and resource consumption of channel information feedback while ensuring that all primary users are free from interference by Secondary User(SU).Based on this,the study further integrates existing power control strategies based on the nearest K primary users,proposing a power control strategy switching mode.This mode can adapt to changes in communication environment,selecting appropriate power control strategy to flexibly meet different communication needs.The study successfully derives accurate closed-form expressions for the outage probability of primary and secondary users under the Nakagami-m channel model,as well as the asymptotic outage probability under the high signal to noise ratio conditions and energy efficiency.Simulation results confirm that,compared to traditional methods,the proposed power control strategy based on short-range ambient backscatter transmission and its power control switching mode exhibit significant advantages in reducing outage probability and improving energy efficiency,demonstrating its innovation and practical value in the wireless communication.

关 键 词：低复杂度 功率控制 环境反向散射 距离 能量效率 中断概率 

分 类 号：TN929[电子电信—通信与信息系统]