| OFDM系统中基于离散余弦变换的信道估计算法改进 |
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| 引用本文： | 程华,朱丽莉,王华奎.OFDM系统中基于离散余弦变换的信道估计算法改进[J].电脑开发与应用,2007,20(12):45-46. |
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| 作者姓名： | 程华 朱丽莉 王华奎 |
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| 作者单位： | 太原理工大学,太原,030024;太原理工大学,太原,030024;太原理工大学,太原,030024 |
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| 摘 要： | 研究了正交频分复用(OFDM)系统中基于离散余弦变换(DCT)的信道估计,利用DCT的能量压缩特性,提出了一种改进的DCT域信道估计算法,通过在DCT域设计一个低通滤波器,有效地减小了加性高斯白噪声对信道估计精确度的影响。仿真结果表明,提出的改进算法比传统基于DCT信道估计算法具备更优的性能。
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| 关 键 词： | 正交频分复用 信道估计 离散余弦变换 低通滤波器 |
| 文章编号： | 1003-5850(2007)12-0045-02 |
| 修稿时间： | 2007年9月4日 |
An Improved Channel Estimation Method for OFDM System based on Discrete Cosine Transform |
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| Cheng Hua.An Improved Channel Estimation Method for OFDM System based on Discrete Cosine Transform[J].Computer Development & Applications,2007,20(12):45-46. |
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| Authors: | Cheng Hua |
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| Abstract: | This paper studies the channel estimation method based on discrete cosine transform(DCT) for Orthogonal Frequency Division Multiplexing(OFDM) system.Using the energy compaction property of DCT,an improved DCT-based channel estimation method is proposed.By designing a low-pass filter in DCT domain,the AWGN influence is effectively reduced and the channel estimation precision is accordingly improved.Simulation results show that the proposed algorithm does achieve better performance than the traditional DCT-based channel estimation. |
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| Keywords: | orthogonal frequency division multiplexing channel estimation discrete cosine transform low-pass filter |
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