| 基于小波和奇异值低阶近似的OFDM信道估计方法 |
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| 引用本文： | 阙大顺,史留成. 基于小波和奇异值低阶近似的OFDM信道估计方法[J]. 电脑与信息技术, 2007, 15(2): 1-3,59 |
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| 作者姓名： | 阙大顺 史留成 |
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| 作者单位： | 武汉理工大学信息学院,湖北,武汉,430063;武汉理工大学信息学院,湖北,武汉,430063 |
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| 摘 要： | 为了提高信道估计算法的准确性和简化计算量,提出了结合小波去噪和奇异值分解的MMSE低阶近似的信道估计方法,先将LS信道估计的结果进行小波去噪,然后将其运用在基于奇异值分解的MMSE低阶近似方法中,最后通过插值算法实现所有子信道的估计.理论分析及仿真证明了本算法的有效性及优越性.
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| 关 键 词： | 小波去噪 奇异值 低阶近似 MMSE 信道估计 OFDM |
| 文章编号： | 1005-1228（2007）02-0001-03 |
| 修稿时间： | 2007-03-15 |
OFDM Channel Estimation Method Based on Wavelet and SVD Low Rank Approximation |
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| QUE Da-shun,SHI Liu-cheng. OFDM Channel Estimation Method Based on Wavelet and SVD Low Rank Approximation[J]. Computer and Information Technology, 2007, 15(2): 1-3,59 |
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| Authors: | QUE Da-shun SHI Liu-cheng |
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| Affiliation: | Information college,Wuhan University Technology,Wuhan,Hubei 430063,China |
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| Abstract: | A new method of OFDM channel estimation combining wavelet-based denoising and SVD-based MMSE low rank approximation is proposed.Firstly,noise reduction is operated on the outcome of LS estimation,and then the processed outcome is used in the svn-based MMSE low rank approximation,finally,all sub-channels estimation is gained by interpolation.The approximation ranks in the method is changeable and simulation result shows the superior performance. |
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| Keywords: | wavelet denoising SVD low rank approximation MMSE channel estimation OFDM |
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