Blind OFDM channel estimation through simple linear precoding
Blind OFDM channel estimation through simple linear precoding
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DOI：
10.1109/twc.2003.821140
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发表时间：
2004-03
影响因子：
10.4
通讯作者：
A. Petropulu;Ruifeng Zhang;R. Lin
中科院分区：
文献类型：
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作者：
A. Petropulu;Ruifeng Zhang;R. Lin
提出了一种用于正交频分复用（OFDM）系统的盲信道估计方法。在每个块进入OFDM系统之前，对其进行线性变换。该变换在传输块上施加一个相关结构，在接收端利用该结构通过简单的互相关操作来恢复信道。该方法计算简单，收敛速度快，适用于快速变化信道的估计。通过均方误差分析和仿真对其性能进行了分析测试。结果表明，该方法优于IEEE 802.11a无线标准中使用的基于训练的方案。
A novel approach of blind channel estimation for orthogonal frequency-division multiplexing (OFDM) systems is proposed. A linear transformation is applied on each block before it enters the OFDM system. The transform imposes a correlation structure on the transmitted blocks, which is exploited at the receiver to recover the channel via simple cross-correlation operations. The proposed approach is computationally simple and converges fast, which makes it a good candidate for estimation of fast-varying channels. Its performance is tested analytically, through a mean-square error analysis, and also via simulations. Results show that it compares favorably to the training-based scheme used in the IEEE 802.11a wireless standard.