| 一种高效的OFDM载波频偏盲估计方法 |
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| 引用本文： | 周德富,蔡惠智. 一种高效的OFDM载波频偏盲估计方法[J]. 电讯技术, 2012, 52(1): 33-37 |
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| 作者姓名： | 周德富 蔡惠智 |
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| 作者单位： | 中国科学院 声学研究所，北京 100190；中国科学院 研究生院，北京 100039;北京中科海讯数字信号处理技术有限公司，北京 100095 |
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| 基金项目： | “十一五”国防预研基金项目（1010704020501） |
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| 摘 要： | 针对正交频分复用（OFDM）系统，提出了一种低复杂度、高性能的载波频偏盲估计方法。该方法充分利用载波频偏估计代价函数在一定区间内的单谷特性，采用黄金分割法搜索载波频偏估计代价函数极值，从而大大降低其计算复杂度。最后对该方法和Tureli′s MUSIC-like(TML)载波频偏估计方法在加性高斯白噪声信道和多径信道环境下进行了仿真，结果表明,在同等条件下该方法的计算复杂度大大低于TML载波频偏估计方法。
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| 关 键 词： | 正交频分复用；载波频偏 盲估计；黄金分割法；计算复杂度 |
A high-efficiency blind carrier frequency offset estimation approach for OFDM systems |
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| ZHOU De-fu and CAI Hui-zhi. A high-efficiency blind carrier frequency offset estimation approach for OFDM systems[J]. Telecommunication Engineering, 2012, 52(1): 33-37 |
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| Authors: | ZHOU De-fu and CAI Hui-zhi |
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| Affiliation: | 1.Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China; 2.Graduate University of the Chinese Academy of Sciences,Beijing 100039,China;3.Beijing Zhongke Haixun Digital Signal Processing Technology Co.,Ltd.,Beijing 100095,China) |
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| Abstract: | A low-complexity and high-performance blind carrier frequency offsets(CFO) estimation approach for Orthogonal Frequency Division Multiplexing(OFDM) systems is proposed.This approach exploits the intrinsic structure information of OFDM signals and the unimodality of the cost function for CFO estimation.It reduces the computational complexity by using the golden section method in searching for the extremum of the cost function.The performance of the proposed method is investigated with numerical simulation.The results show that the new algorithm has much lower complexity than Tureli′s MUSIC-like(TML) approach while achieves the same performance in both additive white Gaussian noise(AWGN) and multipath fading channels. |
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| Keywords: | orthogonal frequency division multiplexing carrier frequency offset blind estimation golden section method computational complexity |
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