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新的OFDM系统同步联合算法 被引量：1

A Novel Joint Synchronization Algorithm for OFDM System
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摘要 对正交频分复用(OFDM)系统的同步算法进行了研究。提出了一种基于循环前缀和虚载波的联合算法。该算法不需要辅助数据,降低了系统冗余度。该算法首先根据循环前缀的特点,用ML算法完成符号同步和小数频偏估计;其次根据虚载波的位置偏移得到整数频偏估计。仿真表明,该算法能够实现符号同步和大范围的频偏估计、计算复杂度低、系统冗余度小,并且可用于快同步。 Synchronization algorithm for orthogonal frequency division multiplex （OFDM） systems is discussed. A joint algorithm is proposed based on cyclic prefix and virtual carriers. This algorithm does not need assistant data hence decreases system redundancy. In the algorithm, the symbol synchronization and the fractional frequency offset are obtained by using ML algorithm based on the cyclic prefix property, and the integral frequency offset is obtained by the position offset of virtual carriers. The results show the proposed algorithm not only achieves symbol synchronization and large range of frequency offset estimation, without increased calculation complexity and system redundancy, but also can be used for fast synchronization.
作者 李兵兵 王雯芳 葛建明 张丰华
机构地区 西安电子科技大学综合业务网理论及关键技术国家重点实验室 西安航空计算技术研究所
出处 《电子科技大学学报》 EI CAS CSCD 北大核心 2008年第4期527-529,共3页 Journal of University of Electronic Science and Technology of China
基金 国家自然科学基金(60496316、60772138) 国家863计划(2007AAO1Z288)
关键词 频率同步 联合算法 OFDM 号同步 虚载波 frequency synchronization joint algorithm OFDM symbol synchronization virtual carrier
分类号 TN919.3 [电子电信—通信与信息系统]
  • 相关文献

参考文献8

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二级参考文献15

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共引文献20

同被引文献14

  • 1邸娜,吴智勇,万戈,杨明.一种DAB系统小数倍频偏估计新方法[J].电视技术,2008,32(z1):11-14. 被引量：1
  • 2任光亮,常义林,张辉,张会宁.无线OFDM系统时频同步方法研究[J].西安电子科技大学学报,2005,32(5):758-761. 被引量：15
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  • 5PARK B, CHEON H, KANG C, et al. A novel timing estimation method for OFDM systems[J]. IEEE Trans. Communications Letters, 2003,7(5) : 239-241.
  • 6REN Guangliang, CHANG Yilin, ZHANG Hui, et al. Synchronization method based on a new constant envelop preaml~le for OFDM systems[J]. IEEE Trans. Broadcasting, 2005,51 ( 1 ) : 139-143.
  • 7AWOSEYILA A B, KASPARIS C, EVANS B G. Robust time-domain timing and frequency synchronization for OFDM systems[J]. IEEE Trans. Consumer Electronics, 2009,55 (2) : 391-399.
  • 8HUANG Qinfei, GHOGHO M, WEI Jibo, et al. Timing and frequency synchronization for OFDM based cooperative systems[C]//Proc.IEEE International Conference on Acoustics, Speech and Signal Processing. Taipei, China: IEEE Press, 2009 : 2649-2652.
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  • 10DONG K K, SANG H D, HONG B C, et al. A new joint algorithm of symbol timing recovery and sampling clock adjustment for OFDM systems[J]. IEEE Trans. Consumer Electronics, 1998,44(3) : 1142- 1149.

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二级引证文献2

电子科技大学学报
2008年 第4期

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