基于导频结构的电力线载波信道自适应跟踪算法  

Adaptive Power Line Channel Tracking Algorithm Based on Pilot Structure

作　　者：任毅 张海龙 李然 祝恩国 努诺·阿马罗 杨威 REN Yi;ZHANG Hailong;LI Ran;ZHU Enguo;NUNO Amaro;YANG Wei(China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China;R&D NESTER,Lisbon 2685038,Portugal)

机构地区：[1]中国电力科学研究院有限公司,北京100192 [2]葡萄牙能源研究中心,里斯本2685038

出　　处：《电力信息与通信技术》2022年第1期20-28,共9页Electric Power Information and Communication Technology

基　　金：中国电力科学研究院有限公司研究开发项目“基于TTCN-3的高速电力线载波测试标准研究”(JL89-20-001)。

摘　　要：针对电力线载波信道的线性周期性时变特性,文章基于标准IEEE 1901.1—2018的物理层提出了一种基于导频结构的信道自适应跟踪算法。算法根据导频进行信道估计,并提取信道的加权相位变化,进而计算得到信道变化的度量值;利用信道变化度量值动态调整导频的插入密度。与传统的不借助导频的盲信道跟踪算法不同,文章提出的信道自适应跟踪算法在不同的信噪比区间均能有效地跟踪信道变化,并在保证通信成功率的前提下,动态降低插入导频导致的系统冗余,达到最优的系统吞吐率。Aiming at the linear periodic time-varying characteristics of power line carrier channel,a channel adaptive tracking algorithm based on pilot structure is proposed based on the physical layer of IEEE 1901.1—2018 standard.The algorithm estimates the channel according to the pilot,extracts the weighted phase change of the channel,and calculates the channel tracking metric.And the insertion density of the pilot is dynamically adjusted based on calculated channel tracking metric.Compared with the traditional blind channel estimation algorithm without pilot,the proposed adaptive algorithm in this paper can effectively track the channel change in different SNR intervals,and dynamically reduce the system redundancy caused by pilot insertion to achieve the optimal system throughput on the premise of ensuring the communication success rate.

关 键 词：电力线载波通信 信道跟踪 线性周期时变信道 IEEE 1901.1—2018 

分 类 号：TM73[电气工程—电力系统及自动化]