| 基于导频的室内可见光自适应OFDM通信系统信道估计 |
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| 引用本文： | 黄震宇,郭树旭,张择书. 基于导频的室内可见光自适应OFDM通信系统信道估计[J]. 现代电子技术, 2014, 0(7): 31-34 |
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| 作者姓名： | 黄震宇 郭树旭 张择书 |
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| 作者单位： | [1]吉林大学电子科学与工程学院,吉林长春130012 [2]总参通信工程设计研究院,辽宁沈阳110005 |
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| 摘 要： | 使用自适应OFDM技术改善可见光通信系统性能,需要以准确的信道估计为前提。研究可见光自适应OFDM通信系统的基于导频的信道估计方法,引入射频通信中常用的LMS方法,与可见光信道基于LS的估计方法进行了比较,并对其特性进行了分析,仿真实验结果表明,采用LMS估计方法在BER为10-3水平时,SNR优于LS估计方法2 dB,LMS信道估计方法信道跟踪能力较强,比LS法抗干扰。
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| 关 键 词： | 可见光通信 自适应OFDM 信道估计 LMS方法 |
Pilot-based channel estimation for adaptive OFDM communication systems of indoor visible light |
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| HUANG Zhen-yu,GUO Shu-xu,ZHANG Ze-shu. Pilot-based channel estimation for adaptive OFDM communication systems of indoor visible light[J]. Modern Electronic Technique, 2014, 0(7): 31-34 |
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| Authors: | HUANG Zhen-yu GUO Shu-xu ZHANG Ze-shu |
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| Affiliation: | 1. College of Electronic Science and Engineering,Jilin University,Changchun 130012,China;2. Communication Engineering Design Research Institute of the PLA General staff,Shenyang 110005,China) |
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| Abstract: | Based on accurate channel estimation,adaptive OFDM technology can be used to improve the visible light com-munication system performance. The method of pilot-based channel estimation used in visible light adaptive OFDM communica-tion systems is researched by introducing the LMS methods which is commonly used in the RF communication. Through com-pared with the existing LS-based estimation methods,their characteristics are analyzed. The simulation results show that when BER turns to be 10-3 with LMS estimation method,the SNR can be 2dB better than LS method. So the channel tracking ability of LMS channel estimation method is stronger,and the anti-jamming capability is better than LS method. |
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| Keywords: | visible light communication adaptive OFDM channel estimation LMS method |
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