| 基于多项式拟合的二维OFDM信道估计算法 |
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| 引用本文： | 刘俊琳,朱近康,邱玲.基于多项式拟合的二维OFDM信道估计算法[J].电子与信息学报,2006,28(11):2077-2080. |
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| 作者姓名： | 刘俊琳 朱近康 邱玲 |
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| 作者单位： | 中国科学技术大学电子工程与信息科学系个人通信与扩频实验室,合肥,230027 |
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| 摘 要： | 该文提出了一种内插导频的二维信道估计算法，用于无线移动信道下的正交频分复用（OFDM）系统。该算法能够适用于矩形内插的导频信号内插方式，相比于梳状内插的导频信号内插方式，矩形内插具有更高的数据传输效率。与已有线性最小均方差（LMMSE）信道估计方法相比，该算法简单并且不需要预先知道信道相关矩阵以及信噪比等信道信息。仿真结果表明，在各种的衰落环境下，该算法都有良好的性能。
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| 关 键 词： | 信道估计 时变信道 |
| 文章编号： | 1009-5896(2006)11-2077-04 |
| 收稿时间： | 2005-03-08 |
| 修稿时间： | 2005-08-22 |
Two-Dimensional Channel Estimation for OFDM Systems
Based on Polynomial Fitting |
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| Liu Jun-lin,Zhu Jin-kang,Qiu Ling.Two-Dimensional Channel Estimation for OFDM Systems
Based on Polynomial Fitting[J].Journal of Electronics & Information Technology,2006,28(11):2077-2080. |
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| Authors: | Liu Jun-lin Zhu Jin-kang Qiu Ling |
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| Affiliation: | PCN & SS Lab., Dept. of EEIS., Univ. of Sci. & Tech. of China, Hefei 230027, China |
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| Abstract: | This paper proposes a robust pilot-assisted channel estimation method for Orthogonal Frequency Division Multiplexing(OFDM) signals in Rayleigh fading. The method can be used in rectangular pilot-assisted geometry, which is more efficient than the comb pilot-assisted geometry. Comparing with the Linear Minimum Mean Square Error (LMMSE) channel estimation method, the method is simple and need not know the channel correlation and signal-to-noise (SNR). The performance is presented in terms of bit-error rate(BER) for a system using QPSK and 16QAM in fading channel. |
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| Keywords: | OFDM |
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