基于适应性扩展和阈值分割的低压电力线信道数据处理算法的研究与应用  

Research and application of data processing algorithm for low voltage power line channel based on adaptive expansion and threshold segmentation

作　　者：谢文旺 孙云莲[1] 黄雅鑫 王华佑 徐冰涵 张众发[2] 王庆斌[2] XIE Wenwang;SUN Yunlian;HUANG Yaxin;WANG Huayou;XU Binghan;ZHANG Zhongfa;WANG Qingbin(School of Electrical Engineering,Wuhan University,Wuhan 430072,China;Yunfu Power Supply Company,Guangdong Power Grid Corporation,Yunfu 527300,China)

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]广东电网公司云浮供电局,广东云浮527300

出　　处：《电力系统保护与控制》2018年第14期100-106,共7页Power System Protection and Control

基　　金：南方电网公司科技项目(035300KK52150007)~~

摘　　要：为了克服电力线通信系统中严重的多径衰落效应,改善低压电力线通信系统的通信质量,引入基于适应性扩展和阈值分割的数据处理算法。建立了OFDM通信系统以及电力线信道的仿真模型,分别对适应性扩展算法以及三级阈值分割算法在电力线通信领域的应用进行了仿真分析。与传统的OFDM通信系统的信道估计技术相比,该算法不占用宝贵的频带资源并且易于实现。实验证明,除去信号被噪声淹没等一些极端情况,对于各种多径信道,该方法均可以有效对抗多径衰落特性,降低误码率(BER),提高通信质量。In order to overcome the serious multipath fading effect in power line communication system and improve the communication quality of low-voltage power line communication system, a data processing algorithm based on adaptive expansion and threshold segmentation is introduced. Simulation models of OFDM communication system and power line channel are established, simulations for the application of expansion algorithm and three-level adaptive threshold segmentation algorithm in the area of power line communication are performed respectively. To sum up, this algorithm does not take up precious bandwidth and easy to realize compared with the traditional OFDM channel estimation techniques. Experimental results show that the proposed method can effectively combat multipath fading characteristics, reduce the Bit Error Rate（BER） and improve the communication quality for a variety of multipath channels.

关 键 词：电力线通信 OFDM 多径衰落 适应性扩展 阈值分割 

分 类 号：TN915.853[电子电信—通信与信息系统]