| OFDM系统中的频偏估计和符号定时算法 |
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| 引用本文： | 王宝珠,张计风,王艳岭,贾科进.OFDM系统中的频偏估计和符号定时算法[J].河北工业大学学报,2011,40(4):9-12. |
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| 作者姓名： | 王宝珠 张计风 王艳岭 贾科进 |
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| 作者单位： | 1. 河北工业大学信息工程学院,天津,300401
2. 空军工程大学电讯工程学院,陕西西安,710077 |
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| 基金项目： | 陕西省自然科学基金(2009JM8001-3) |
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| 摘 要： | 为克服正交频分复用( OFDM)系统中同步偏差带来的符号间干扰和载波间干扰,提出了一种基于相关矩阵的频偏估计和符号定时算法.该算法通过求解相关矩阵的非对角元素的极值确定小数倍频偏；通过分析相关矩阵对角线上元素的大小可确定整数倍频偏；通过平移FFT窗口,满足定义函数最大可实现符号定时同步.仿真结果表明该算法具有较好的估计...
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| 关 键 词： | 正交频分复用 同步 频偏估计 符号定时估计 载波干扰 符号干扰 |
An algorithm for frequency offset estimation and symbol timing of OFDM system |
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| WANG Bao-zhu,ZHANG Ji-feng,WANG Yan-ling,JIA Ke-jin.An algorithm for frequency offset estimation and symbol timing of OFDM system[J].Journal of Hebei University of Technology,2011,40(4):9-12. |
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| Authors: | WANG Bao-zhu ZHANG Ji-feng WANG Yan-ling JIA Ke-jin |
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| Affiliation: | WANG Bao-zhu1,ZHANG Ji-feng1,WANG Yan-ling2,JIA Ke-jin1(1.School of Information Engineering,Hebei University of Technology,Tianjin 300401,China,2.Telecommunication Engineering Institute of Air Force Engineering University,Shaanxi Xi'an 710077,China) |
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| Abstract: | An algorithm for frequency offset estimation and symbol timing based on correlation matrix was given to reduce ISI and ICI of OFDM system.The algorithm got the fractional frequency offset by minimizing the off-diagonal elements and got the integral frequency offset by sizing the diagonal elements.The estimation of symbol timing based on maximized the function by sliding the FFT window.Simulation results show that the algorithm has high estimate precision and large range. |
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| Keywords: | OFDM synchronization frequency offset estimation symbol timing estimation ICI ISI |
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