| 一种基于相位参考符号的载波频偏估计方法 |
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| 引用本文： | 刘鹏,毕岗,沈继忠,蔡明勤.一种基于相位参考符号的载波频偏估计方法[J].江南大学学报(自然科学版),2008,7(5). |
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| 作者姓名： | 刘鹏 毕岗 沈继忠 蔡明勤 |
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| 作者单位： | 1. 浙江大学,电子电路与信息系统研究所,浙江,杭州,310027
2. 义安理工学院,电子与电脑工程系,新加坡,599489 |
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| 摘 要： | 为解决正交频分复用(OFDM)系统中由多普勒频移和本地晶振偏移造成的载波频偏,提出了基于相位参考符号的频偏估计方法.这一方法把频偏分为粗、细频偏两部分分别加以计算.针对通用OFDM系统,用随机序列进行验证;结合一个OFDM实例——数字音频广播(DAB)系统,利用实际广播信号进行测试.与其他算法比较表明,在运算精度基本不变的情况下,运算复杂度得到了明显降低.相关模块已经在DAB接收机中得到实现,具有较好的应用价值.
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| 关 键 词： | 正交频分复用 相位参考符号 载波频偏 数字音频广播 |
Frequency Offset Estimation Based on Phase Reference Symbol |
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| LIU Peng,BI Gang,SHEN Ji-zhong,Chua Beng-Koon.Frequency Offset Estimation Based on Phase Reference Symbol[J].Journal of Southern Yangtze University:Natural Science Edition,2008,7(5). |
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| Authors: | LIU Peng BI Gang SHEN Ji-zhong Chua Beng-Koon |
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| Abstract: | To combat frequency offset due to Doppler shifts or local oscillator drifts,a novel approach to frequency offset estimation based on phase reference symbol is presented.The method divides frequency offset into coarse offset and fine offset and calculates them,respectively.It is verified with both pseudorandom data of a common OFDM system,and broadcasting data of a certain OFDM system: DAB.Compared to conventional algorithms,it greatly reduces the computational complexity while the accuracy remains the same.The algorithm has successfully been implemented in a real DAB receiver and works. |
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| Keywords: | OFDM phase reference symbol frequency offset DAB |
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