| OFDM系统信道盲估计的子空间算法 |
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| 引用本文： | 黄学军,毕厚杰,余松煜.OFDM系统信道盲估计的子空间算法[J].上海交通大学学报,2004,38(Z1):6-9. |
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| 作者姓名： | 黄学军 毕厚杰 余松煜 |
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| 作者单位： | 上海交通大学,图像通信与信息处理研究所,上海,200030 |
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| 摘 要： | 利用循环前缀(CP)引入的信息冗余,提出一种利用接收信号的二阶统计特性实现正交频分复用(OFDM)系统信道盲估计的子空间算法.由于OFDM传输方程不能直接推导子空间算法,故首先给出一种新的方法对OFDM传输方程作矩阵变换,从而得到一个结构简单的新方程,基于此推导出信道估计子空间算法.该算法不需要改变OFDM系统结构,不受信道零点位置的限制,在信道过估计的情况下也适用.
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| 关 键 词： | 正交频分复用 盲辨识 子空间算法 |
| 文章编号： | 1006-2467(2004)S1-0006-04 |
| 修稿时间： | 2003年10月23 |
Subspace-Based Blind Channel Estimation for Orthogonal Frequency Division Multiplexing (OFDM) Systems |
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| HUANG Xue-jun,BI Hou-jie,YU Song-yu.Subspace-Based Blind Channel Estimation for Orthogonal Frequency Division Multiplexing (OFDM) Systems[J].Journal of Shanghai Jiaotong University,2004,38(Z1):6-9. |
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| Authors: | HUANG Xue-jun BI Hou-jie YU Song-yu |
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| Abstract: | Exploiting the redundancy introduced by the cyclic prefix (CP), a subspace-based algorithm for blind channel estimation using second-order statistics was proposed in OFDM systems. Because the transmission equation of OFDM systems does not exactly have the desired structure to directly derive a subspace algorithm, a new matrix transform on the equation is proposed, then a blind subspace-based algorithm is developed. The algorithm does not change the existing OFDM systems and is not sensitive to the channel zero locations. It is robust to channel order overdetermination. |
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| Keywords: | orthogonal frequency division multiplexing (OFDM) blind identification subspace algorithm |
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