| 一种相关编码正交频分复用系统的载波频偏估计算法 |
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| 引用本文： | 陈志刚,张太镒,刘海员.一种相关编码正交频分复用系统的载波频偏估计算法[J].西安交通大学学报,2005,39(4):429-432. |
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| 作者姓名： | 陈志刚 张太镒 刘海员 |
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| 作者单位： | 西安交通大学电子与信息工程学院,710049,西安 |
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| 基金项目： | 国家自然科学基金资助项目(90207012). |
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| 摘 要： | 基于相关编码正交频分复用(OFDM)系统，提出了一种新的数据辅助载波频偏估计技术，利用相关编码OFDM系统的频域幅度特性估计载波频率偏移，增大了频偏估计的跟踪范围，同时采用改进的迭代估计剩余频偏方法，消除载波间干扰对频偏估计的影响，提高了估计精度．仿真结果表明，与传统的基于数据辅助频偏估计技术相比，该技术的跟踪估计范围增大为(-1，1)，且在较高信噪比的估计均方误差明显降低。
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| 关 键 词： | 正交频分复用 载波频率偏移 载波间干扰 |
| 文章编号： | 0253-987X(2005)04-0429-04 |
| 修稿时间： | 2004年6月11日 |
Novel Algorithm of Carrier Frequency Offset Estimation for Correlative Coded Orthogonal Frequency Division Multiplexing Systems |
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| Chen Zhigang,Zhang Taiyi,Liu Haiyuan.Novel Algorithm of Carrier Frequency Offset Estimation for Correlative Coded Orthogonal Frequency Division Multiplexing Systems[J].Journal of Xi'an Jiaotong University,2005,39(4):429-432. |
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| Authors: | Chen Zhigang Zhang Taiyi Liu Haiyuan |
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| Abstract: | A new data-aided carrier frequency offset (CFO) estimation algorithm was proposed for orthogonal frequency division multiplexing (OFDM) systems. The algorithm estimates CFO by exploiting the characteristics of correlative coded OFDM systems in the frequency domain, which increases the tracking range of CFO. Meanwhile,CFO estimation error caused by intercarrier interference is removed by using an improved iterative residual CFO estimation method. Simulation results show that the algorithm outperforms traditional data-aided estimation algorithms,the tracking range is increased to (-1,1) and the variance of CFO estimate is visibly improved at higher signal to noise ratios. |
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| Keywords: | orthogonal frequency division multiplexing carrier frequency offset intercarrier interference |
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