| OFDM系统载频偏移估计算法的研究 |
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| 引用本文： | 李新民,康晓非,张鸣.OFDM系统载频偏移估计算法的研究[J].西安科技大学学报,2006,26(4):549-552. |
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| 作者姓名： | 李新民 康晓非 张鸣 |
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| 作者单位： | 西安科技大学,通信与信息工程学院,陕西,西安,710054 |
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| 摘 要： | 载波频率偏移是OFDM系统实现的关键问题之一。分析了OFDM系统载频偏移估计的2种算法，即利用循环前缀和训练序列方法。它们均为最大似然估计方法。分别讨论了它们的基本思想、实现方法和仿真结果。可以看出基于循环前缀算法复杂度较小，精度不高，而基于训练序列的算法有较高的估计精度，但降纸了系统传输效率。
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| 关 键 词： | 正交频分复用 载波频率偏移估计 最大似然估计 |
| 文章编号： | 1672-9315(2006)04-0549-04 |
| 修稿时间： | 2005年10月8日 |
Algorithms of carrier frequency offset estimation in OFDM system |
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| LI Xin-min,KANG Xiao-fei,ZHANG Ming.Algorithms of carrier frequency offset estimation in OFDM system[J].JOurnal of XI’an University of Science and Technology,2006,26(4):549-552. |
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| Authors: | LI Xin-min KANG Xiao-fei ZHANG Ming |
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| Abstract: | Carrier frequency offset is one of the key problems in OFDM system.Two foundational methods,cycling prefix-based and training sequence-based algorithms,to estimate OFDM carriers frequency offset are analyzed.Then it discusses their basic thoughts,implementing methods and simulation results.Finally,merits and demerits of every algorithm are supposed.It concludes that the cycling prefix-based algorithm has less complexity and less precision,and that the training sequence-based algorithm has better estimation performance at the cost of transmission efficiency. |
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| Keywords: | OFDM carriers frequency offset estimation MLE |
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