| 用基于导频的维纳滤波器对快变信道进行性能评估 |
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| 引用本文： | 胡亮,陈少平,夏细苟.用基于导频的维纳滤波器对快变信道进行性能评估[J].现代电子技术,2006,29(7):57-59. |
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| 作者姓名： | 胡亮 陈少平 夏细苟 |
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| 作者单位： | 中南民族大学,电子信息工程学院,湖北,武汉,403374 |
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| 摘 要： | OFDM信号在快变信道中传输时会导致其正交性的破坏,会产生信道间干扰(ICI)。传统的信道仿真模型在快变信道的仿真过程中效果会有明显的下降,通过基于导频的OFDM信号,运用维纳滤波器对数字电视广播(DVBT)系统信道在时变WSSUS模型下进行了性能仿真,同时也分析了在运用与信道不匹配模型情况下的维纳滤波器模型进行分析时所带来的问题。
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| 关 键 词： | 正交频分复用 维纳滤波 信道估计 数字电视技术 |
| 文章编号： | 1004-373X（2006）07-057-03 |
| 收稿时间： | 2005-09-26 |
| 修稿时间： | 2005年9月26日 |
Estimation of Rapid Time - Variant Channels for OFDM Using Wiener Filtering |
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| HU Liang,CHEN Shaoping,XIA Xigou.Estimation of Rapid Time - Variant Channels for OFDM Using Wiener Filtering[J].Modern Electronic Technique,2006,29(7):57-59. |
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| Authors: | HU Liang CHEN Shaoping XIA Xigou |
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| Affiliation: | Electronics Information Engineering College, South Central University for Nationalities, Wuhan, 403374, China |
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| Abstract: | The performance of Orthogonal Frequency Division Multiplexing(OFDM) deteriorates in a rapidly timevariant environment due to the loss of orthogonality,resulting in Inter Channel Interference(ICI).Moreover,the quality of a modelbased channel estimation may degrade if the estimator has been designed for a timeinvariant scenario.In this paper,we consider OFDM and pilot aided channel estimation via Wiener filtering and derive the filter for a timevariant WSSUS model.In addition,the analysis allows to compute the performance loss for an improper estimation filter which suffers from the problem of model mismatch. |
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| Keywords: | OFDM Wiener filter channal estimation DVB-T |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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