电力信息与通信技术2024，Vol.22Issue(7)：82-87,6.DOI:10.16543/j.2095-641x.electric.power.ict.2024.07.11
基于变步长匹配追踪的G3-PLC系统信道估计算法
Channel Estimation Algorithm for G3-PLC Systems Based on Variable Step Size Matching Pursuit
吴铭 1沈瑞强 2袁三男1
作者信息
- 1. 上海电力大学电子与信息工程学院,上海市杨浦区 201306
- 2. 江苏林洋能源股份有限公司,江苏省南通市 226200
- 折叠
摘要
Abstract
In order to leverage the sparse characteristics of power line communication channel and improve the reliability of G3-PLC system communication,this paper proposes a sparsity adaptive variable step size forward-backward pursuit (SA-VSSFBP) algorithm based on the theory of compressed sensing (CS). This algorithm builds upon the forward-backward pursuit (FBP) algorithm and introduces the concept of variable step size with adaptivity. It employs a large step size in the initial iterations to reduce the number of iterations,and a small step size in the later iterations to obtain accurate estimates. Additionally,the atomic matching test is utilized for sparsity pre-estimation to ensure the approximation of the real sparsity,speed up the iteration speed and reduce the running time of the algorithm. The simulation results show that:compared with the traditional channel estimation method,the compressed sensing channel estimation method has superior performance;and compared with the orthogonal matching pursuit (OMP) and FBP compressed sensing channel estimation algorithms,the algorithm proposed in this paper is able to improve 24.14% and 47.2% of the efficiency of the algorithm in the case of guaranteeing that the accuracy is comparable to that of the FBP with the step size of 1.关键词
G3-PLC/OFDM/电力线信道/变步长/前向后向追踪Key words
G3-PLC/OFDM/power line channel/variable step size/forward-backword pursuit分类
信息技术与安全科学引用本文复制引用
吴铭,沈瑞强,袁三男..基于变步长匹配追踪的G3-PLC系统信道估计算法[J].电力信息与通信技术,2024,22(7):82-87,6.
