| Blind channel estimation through redundant linear precoding for OFDM systems |
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| 引用本文： | 梁永明 Luo Hanwen Wu Yadong Huang Jianguo. Blind channel estimation through redundant linear precoding for OFDM systems[J]. 高技术通讯(英文版), 2007, 13(2): 150-154 |
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| 作者姓名： | 梁永明 Luo Hanwen Wu Yadong Huang Jianguo |
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| 作者单位： | [1]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, P.R.China [2]Advanced Research and Development-Centre. Sharp Electronics （Shanghai） Co.,Ltd, Shanghai 201206, P.R.China [3]College of Marine Engineering, Northwestern Polytechnical University, Xi＇an 710072, P.R.China] |
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| 基金项目： | Sponsored by the National Natural Science Foundation of China （No.60572157）, the High Technology Research and Development Program of China （No.2003AA123310） and Sharp Electronics（Shanghai） Co., Ltd. |
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| 摘 要： | A novel approach of blind channel estimation through redundant linear precoding for orthogonal fre-quency-division multiplexing （OFDM） is proposed. A redundant linear frequency-domain preceder is ap-plied to each pair of blocks before they enter the OFDM system. With the aid of the introduced structure, the frequency-selective channel can be identified at the receiver through auto-correlation operations, sin-gular value decomposition （SVD） and scalar ambiguity resolution. The proposed blind channel estimation method has low computation complexity and requires no prior statistical information of channel or noise. The redundant linear frequency-domain precoder is employed to identify the frequency-selective fading channels. And the proposed blind channel estimation method has high spectral efficiency because it re-quires no training sequence. Computer simulations have proved that this proposed blind channel estima- tion method can identify the frequency-selective channels perfectly and have a good performance.
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| 关 键 词： | 线形预编码 盲通道估计 频率 区域 OFDM系统 |
Blind channel estimation through redundant linear precoding for OFDM systems |
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| Liang Yongming,Luo Hanwen,Wu Yadong,Huang Jianguo,. Blind channel estimation through redundant linear precoding for OFDM systems[J]. High Technology Letters, 2007, 13(2): 150-154 |
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| Authors: | Liang Yongming Luo Hanwen Wu Yadong Huang Jianguo |
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| Abstract: | A novel approach of blind channel estimation through redundant linear precoding for orthogonal frequency-division multiplexing (OFDM) is proposed. A redundant linear frequency-domain precoder is applied to each pair of blocks before they enter the OFDM system. With the aid of the introduced structure, the frequency-selective channel can be identified at the receiver through auto-correlation operations, singular value decomposition (SVD) and scalar ambiguity resolution. The proposed blind channel estimation method has low computation complexity and requires no prior statistical information of channel or noise. The redundant linear frequency-domain precoder is employed to identify the frequency-selective fading channels. And the proposed blind channel estimation method has high spectral efficiency because it requires no training sequence. Computer simulations have proved that this proposed blind channel estimation method can identify the frequency-selective channels perfectly and have a good performance. |
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| Keywords: | OFDM blind channel estimation redundant linear precoding auto-correlation SVD |
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