基于门限判断机会调度的多用户PLC/RF系统性能分析  

Performance analysis of opportunistic scheduling based on threshold judgment for multi-user PLC/RF communication systems

作　　者：徐天 刘笑宇 孔槐聪 朱丽文 林敏[1] XU Tian;LIU Xiaoyu;KONG Huaicong;ZHU Liwen;LIN Min(School of Communications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,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

出　　处：《南京邮电大学学报（自然科学版）》2023年第1期29-37,共9页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：重点国际合作项目(61720106003)资助项目。

摘　　要：针对融入译码转发中继技术的混合电力线通信(Power Line Communication, PLC)与射频(Radio-Frequency, RF)传输系统,首先提出了一种基于门限判断的多用户机会调度方案。其次,在PLC和RF链路信道衰落分别服从对数正态分布和相关莱斯分布的条件下,推导出采用所提调度方案的PLC/RF系统中断概率和归一化平均反馈负载的闭合表达式。接着,还通过分析高信噪比条件下系统中断概率的渐进性能,得到系统分集度和阵列增益的简单闭合表达式。最后,计算机仿真不仅验证了理论分析的正确性,而且进一步揭示了所提方案能够在尽量减少反馈负载的同时获得较优的中断性能,从而为实际的系统设计提供参考和依据。For power line communication(PLC) and radio-frequency(RF) transmission systems with decode-and-forward relay technology, a multi-user opportunistic scheduling scheme based on threshold judgment is proposed. Given that PLC and RF link channel fading follows the lognormal distribution and the correlation Rice distribution, respectively, the closed-form expressions of the outage probability and the normalized average feedback load of PLC/RF systems are derived by the proposed scheduling scheme. Then, by analyzing the asymptotic performance of the system outage probability under high SNR conditions, the simple closed-form expressions of the system diversity order and the array gain are obtained. Finally, the simulation demonstrates the correctness of the theoretical analysis, and further reveals that the proposed scheme can achieve good outage performance while reducing the feedback load, thus providing reference and basis for system design in practice.

关 键 词：电力线通信 射频通信 多用户调度 中断概率 

分 类 号：TN92[电子电信—通信与信息系统]