| OFDM系统中一种简单的克服载波频率偏移的方法 |
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| 引用本文： | 赵凯,王峥,夏宇闻.OFDM系统中一种简单的克服载波频率偏移的方法[J].电子测量技术,2006,29(3):148-150. |
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| 作者姓名： | 赵凯 王峥 夏宇闻 |
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| 作者单位： | 北京航空航天大学,北京,100083;北京大学,北京,100871 |
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| 摘 要： | 文中提出了一种简单的方法,用来对正交频分复用(OFDM)系统中载波频率的偏移进行纠正。传统用来纠正载波频偏的方法都是从时域上进行的,文中推荐的方法是,从时域到频域变换的FFT模块入手,通过改变FFT的旋转因子来完成的。通过文中的方法,不但可以利用前项纠错的方式避免反馈,而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。仿真结果证实,这种方法对性能还有一些提高。
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| 关 键 词： | 载波频率偏移 正交频分复用(OFDM) 系统FFT |
Simple method for carrier offset correction in OFDM system |
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| Zhao Kai,Wang Zheng,Xia Yuwen.Simple method for carrier offset correction in OFDM system[J].Electronic Measurement Technology,2006,29(3):148-150. |
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| Authors: | Zhao Kai Wang Zheng Xia Yuwen |
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| Affiliation: | 1. Beijing University of Aeronautics and Astronautics, Beijing, 100083;2. Beijing University, Beijing, 100871 |
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| Abstract: | In this paper, a simple method for carrier offset correction in OFDM system is introduced The traditional method is carried on time domain, and the method recommended in this paper is to correct the carrier offset by changing the twiddle factor of the FFT. Through this method, we can not only avoid the feedback by using forward error correction, but also reduce the times of complex multiplication in order to reduce the power consumption of the system. The simulation result shows this method could also improve the performance of the system. |
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| Keywords: | carrier frequency offset (CFO) OFDM FFT |
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