| 基于小波去噪与变换域的信道估计方法 |
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| 引用本文： | 赵超,岳喜顺. 基于小波去噪与变换域的信道估计方法[J]. 计算机工程与设计, 2010, 31(7) |
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| 作者姓名： | 赵超 岳喜顺 |
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| 作者单位： | 华南理工大学自动化科学与工程学院,广东,广州,510641 |
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| 摘 要： | 针对长期演进(LTE)下行正交频分复用(OFDM)系统的最小二乘(LS)信道估计算法对噪声比较敏感的问题,提出了一种基于小波变换去噪与变换域插值相结合的信道估计方法.该方法通过在最小二乘(LS)估计之后加入小波阈值去噪过程,再通过变换域低通滤波插值估计进行双重去噪处理.计算机仿真结果表明,该估计方法能够有效地去除加性高斯白噪声,比一般的LS估计算法性能要好,在一定程度上弥补了LS估计算法对噪声敏感的缺陷.
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| 关 键 词： | 长期演进 正交频分复用 信道估计 小波去噪 变换域 |
Channel estimation algorithm based on wavelet de-noising and transform domain |
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| ZHAO Chao,YUE Xi-shun. Channel estimation algorithm based on wavelet de-noising and transform domain[J]. Computer Engineering and Design, 2010, 31(7) |
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| Authors: | ZHAO Chao YUE Xi-shun |
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| Affiliation: | ZHAO Chao,YUE Xi-shun(College of Automation Science , Engineering,South China University of Technology,Guangzhou 510641,China) |
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| Abstract: | To solve the problem that least-squares(LS) channel estimation is sensitive to the noise,a new method of channel estimation in the LTE(long term evolution) orthogonal frequency division multiplexing down-link transmission system is proposed.The method combines wavelet de-nosing with interpolation in the transform domain,and it reduces the effect of the noise acting on the channel esti-mation effectively.This channel estimation method uses least-squares(LS) estimation at first,then uses the wavelet de-noisin... |
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| Keywords: | LTE OFDM channel estimation wavelet de-noising transform domain |
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