| 一种自适应的OFDM频偏估计方法 |
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| 引用本文： | 莫祥林,杜建洪. 一种自适应的OFDM频偏估计方法[J]. 复旦学报(自然科学版), 2005, 44(1): 90-94 |
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| 作者姓名： | 莫祥林 杜建洪 |
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| 作者单位： | 复旦大学,通信科学与工程系,上海,200433;复旦大学,通信科学与工程系,上海,200433 |
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| 摘 要： | 正交频分复用(orthogonal frequency division multiplxing，OFDM)对于载波频偏极其敏感，这种频偏来源于接收端载波与发送端载波的频率差异以及多普勒频移，从而带来了严重的载波间干扰(inter-carrier interference，ICI)，限制了系统的性能．为克服该问题，提出了一种利用虚载波(virtual carrier，VC的基于子空间方法的频偏估计算法，并研究了它的自适应实现．仿真结果表明该方法估计得到的频偏值与设定值吻合得很好。
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| 关 键 词： | 通信技术 正交频分复用 载波间干扰抵消 频偏纠正 |
| 文章编号： | 0427-7104(2005)01-0090-05 |
An Adaptive Frequency Offset Estimating Algorithm for OFDM System |
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| MO Xiang-lin,DU Jian-hong. An Adaptive Frequency Offset Estimating Algorithm for OFDM System[J]. Journal of Fudan University(Natural Science), 2005, 44(1): 90-94 |
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| Authors: | MO Xiang-lin DU Jian-hong |
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| Abstract: | OFDM(orthogonal frequency division multiplexing) is very sensitive to frequency offset originating from the Doppler frequency offset and the frequency difference between transmitter and receiver,resulting in severe ICI(inter-carrier interference) and performance degradation. In order to solve this problem,an algorithm based on subspace method and utilizing the VC (virtual carrier) is proposed. The adaptive realization of this algorithm is studied. Simulation shows that the estimated values by the algorithm proposed matches the set values very well. |
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| Keywords: | communication technique OFDM ICI cancellation frequency offset correction. |
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