| 改进LMS在低压电力线OFDM信道估计中的应用 |
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| 引用本文： | 焦明伟,贾振红,覃锡忠,李涛,赵君凯. 改进LMS在低压电力线OFDM信道估计中的应用[J]. 计算机工程与应用, 2010, 46(34): 92-94. DOI: 10.3778/j.issn.1002-8331.2010.34.029 |
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| 作者姓名： | 焦明伟 贾振红 覃锡忠 李涛 赵君凯 |
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| 作者单位： | 1.新疆大学 信息科学与工程学院，乌鲁木齐 830046 2.中国移动通信集团 新疆有限公司，乌鲁木齐 830091 |
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| 基金项目： | 教育部新世纪优秀人才支持计划项目 |
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| 摘 要： | 正交频分复用（OFDM）技术以其多种优势成为低压电力线宽带通信的最佳选择，而信道估计是正交频分复用系统的关键问题之一。修正了当前电力线信道中LMS信道估计参数选择上存在的问题，并首次在信道估计中加入动量项加速LMS算法的收敛速度。仿真结果表明，改进的算法优于原来的信道估计算法。
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| 关 键 词： | 低压电力线 正交频分复用 信道估计 最小均方算法 动量项 |
| 收稿时间： | 2009-04-14 |
| 修稿时间： | 2009-6-1 |
Application of improved LMS channel estimation algorithm for low-voltage power line in OFDM systems |
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| JIAO Ming-wei,JIA Zhen-hong,QIN Xi-zhong,LI Tao,ZHAO Jun-kai. Application of improved LMS channel estimation algorithm for low-voltage power line in OFDM systems[J]. Computer Engineering and Applications, 2010, 46(34): 92-94. DOI: 10.3778/j.issn.1002-8331.2010.34.029 |
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| Authors: | JIAO Ming-wei JIA Zhen-hong QIN Xi-zhong LI Tao ZHAO Jun-kai |
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| Affiliation: | 1.College of Information Science & Engineering，Xinjiang University，Urumqi 830046，China 2.Xinjiang Mobile Communication Company，Urumqi 830091，China |
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| Abstract: | Orthogonal Frequency Division Multiplexing technique（OFDM） is the best choice for low-voltage power line broadband communication because of its many advantages, and channel estimation is one of the key problems in the OFDM system.The problem of parameter selection in the current power-line LMS channel estimation is adjusted in this paper, and momentum term is first used to accelerate the convergence rate of LMS algorithm in the channel estimation.Simulation re- suits show that the improved algorithm is better than the original one. |
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| Keywords: | low-voltage power line Orthogonal Frequency Division Multiplexing（OFDM） channel estimation Least Mean Square（LMS） momentum term |
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