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基于载波间干扰自抵消的OFDM频率同步 被引量：1

Frequency synchronization for inter-carrier interference self-cancellation based OFDM systems
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摘要 载波间干扰自抵消(ICISC)方案在频率域引入了冗余信息,提高了OFDM系统对频偏的稳健性。基于最大似然原理,针对ICISC方案提出了两种OFDM最大似然同步新算法。分析了算法的估计范围、方差性能以及Cramer-Rao下界。两种方法具有估计频偏范围大、估计精度高以及实现简单等优点,计算机仿真结果表明了方法的优越性。 The scheme of inter-carrier interference self-cancellation （ICISC） introduces the information redundancy in frequency domain, which can improve the robustness to carrier frequency offset （CFO）. Based on maximum likelihood principle, two efficient frequency synchronizers are developed for ICISC based OFDM systems. The range of CFO can be coped with, the variance of the estimator and the Cramer-Rao bound are analyzed. The proposed synchronizers have advantages of large range of CFO can be estimated, high accuracy in estimation and easy implementation. Computer simulations evaluate the performance with comparison to the Cramer-Rao bound.
作者 张杰 廖桂生 王珏
机构地区 西安电子科技大学雷达信号处理重点实验室 西安电子科技大学应用数学系
出处 《电波科学学报》 EI CSCD 北大核心 2006年第1期98-103,共6页 Chinese Journal of Radio Science
基金 国家自然科学基金资助(60472097)
关键词 正交频分复用 载波频偏 载波间干扰自抵消 最大似然 克拉美-罗下界 orthogonal frequency-division multiplexing, carrier frequency offset,inter-carrier interference self-cancellation, maximum likelihood, Cramer-Rao lowerbound
分类号 TN929 [电子电信—通信与信息系统]
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参考文献15

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共引文献9

同被引文献13

  • 1吴赟,罗汉文,宋文涛.瑞利衰落信道下改进的OFDM符号定时算法[J].电波科学学报,2006,21(6):825-829. 被引量：2
  • 2肖海林,聂在平,杨仕文.室内MIMO无线信道:模型和性能预测[J].电波科学学报,2007,22(3):385-389. 被引量：19
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引证文献1

二级引证文献4

电波科学学报
2006年 第1期

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