PLC与VLC融合通信系统中的信道估计技术分析
Performance Analysis of Channel Estimation for Hybrid PLC & VLC System
摘要
研究了基于OFDM (正交频分复用)的电力线与可见光融合通信系统中的信道估计技术, 通过建立电力线与可见光信道模型, 研究了梳状和块状导频结构下的LS(最小二乘)与SVD(奇异值分解)两种估计准则, 以及线性插值与基于DFT(离散傅里叶变换)的插值两种内插方法, 通过比较发现, 块状导频下的SVD结合线性插值是性能较佳的信道估计算法, 并且该算法对导频间隔不敏感。
Abstract
The channel estimation for hybrid Power Line Communication (PLC) & Visible Light Communication (VLC) system based on Orthogonal Frequency Division Multiplexing (OFDM) is investigated. We first introduce a hybrid communication system with PLC and VLC channel models. Then we study two kinds of pilot structure of block type and comb type, two estimation criterions of Least Squares (LS) and Singular Value Decomposition (SVD), and two interpolation methods of linear interpolation and Discrete Fourier Transform (DFT)-based interpolation. It is shown that SVD combined with linear interpolation is more appropriate to hybrid PLC & VLC system, which has the best performance and is insensitive to pilot space.
陈梦迟, 冯勇华, 游善红, 周敏彤, 王颖, 王震. PLC与VLC融合通信系统中的信道估计技术分析[J]. 光通信研究, 2017, 43(1): 3. CHEN Meng-chi, FENG Yong-hua, YOU Shan-hong, ZHOU Min-tong, WANG Ying, WANG Zhen. Performance Analysis of Channel Estimation for Hybrid PLC & VLC System[J]. Study On Optical Communications, 2017, 43(1): 3.