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。
Effective Power Control Strategy Based on Short-range Backscattering
This study proposes a power control strategy based on short-range ambient backscatter transmission,uniquely circumven-ting traditional requirement of estimating all the users'Channel State Information(CSI).Its advantage lies in utilizing short-range trans-mission 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 feed-back 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.
low-complexitypower controlambient backscatterdistanceenergy efficiencyoutage probability
国家科技期刊平台
NSTL
万方数据
