| 基于ESPRIT算法的子载波交织型OFDMA上行链路频偏估计 |
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| 引用本文： | 严杰,丁腾波,田玉双,李式巨.基于ESPRIT算法的子载波交织型OFDMA上行链路频偏估计[J].电路与系统学报,2007,12(4):5-10. |
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| 作者姓名： | 严杰 丁腾波 田玉双 李式巨 |
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| 作者单位： | 浙江大学,信电系,信息与通信工程研究所,浙江,杭州,310027 |
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| 基金项目： | 浙江省重点科研工业项目（2006C21009）） |
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| 摘 要： | 频率同步问题对于OFDMA系统来说至关重要。本文针对子载波交织分配的OFDMA系统上行链路，利用其接收信号周期性的结构特征，提出一种基于ESPRIT算法的多用户频偏估计算法，通过子空间旋转不变的特点估计各用户的载波频偏。仿真表明，利用该算法进行频偏估计具有良好的准确性。
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| 关 键 词： | OFDMA 子载波交织分配 ESPRIT 频偏估计 |
| 文章编号： | 1007-0249（2007）04-0005-06 |
| 修稿时间： | 2006-05-292006-07-12 |
ESPRIT based frequency offset estimation for interleaved OFDMA uplink systems |
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| YAN Jie,DING Teng-bo,TIAN Yu-shuang,LI Shi-ju.ESPRIT based frequency offset estimation for interleaved OFDMA uplink systems[J].Journal of Circuits and Systems,2007,12(4):5-10. |
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| Authors: | YAN Jie DING Teng-bo TIAN Yu-shuang LI Shi-ju |
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| Affiliation: | Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Frequency synchronization is crucial to OFDMA systems. For uplink OFDMA system, the interleaved subcarrier allocation strategy makes use of the received signal with a periodic structure. This paper proposes an ESPRIT based algorithm to estimate the multi-user frequency offsets via subspace rotational invariance technique. Simulation results illustrate the accuracy of the frequency offset estimation algorithm. |
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| Keywords: | OFDMA interleaved subcarrier allocation ESPRIT frequency offset estimation |
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