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CN 41-1437/TS  ISSN 2096-1553

高速移动信道中的OFDM载波频偏估计

陈东华

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陈东华. 高速移动信道中的OFDM载波频偏估计[J]. 轻工学报, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
引用本文: 陈东华. 高速移动信道中的OFDM载波频偏估计[J]. 轻工学报, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
shu
CHEN Dong-hua. Carrier frequency offset estimation for OFDM in highly mobile channels[J]. Journal of Light Industry, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
Citation: CHEN Dong-hua. Carrier frequency offset estimation for OFDM in highly mobile channels[J]. Journal of Light Industry, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
shu

高速移动信道中的OFDM载波频偏估计

  • 华侨大学 信息科学与工程学院, 福建 厦门 361021

  • 基金项目: 福建省自然科学基金项目(2012J05119)
    广西无线宽带通信与信号处理重点实验室2011年度主任基金项目(21104)
    华侨大学科研基金资助项目(12BS222)
    中央高校基本科研业务费专项资金资助(11QZR02)

  • 中图分类号: TN911

Carrier frequency offset estimation for OFDM in highly mobile channels

  • College of Infor. Sci. and Eng., Huaqiao Univ., Xiamen 361021, China

  • Received Date: 2012-07-10
    Available Online: 2012-09-15

    CLC number: TN911

  • 摘要: 为了提高时变信道中OFDM载波频偏的估计性能,在相邻符号之间插入短时重复训练序列进行载波频偏估计,进而通过缩短相关间隔来降低信道时变对载波频偏估计的影响.仿真结果表明,当时变信道归一化多普勒频率大于0.1时,短时序列估计方法的性能优于传统循环前缀方法;而当信道变化加快时,短时序列估计方法的性能优势更加明显,更适宜高速移动环境中的载波频偏估计.
    Abstract: In order to improve the estimation performance of carrier frequency offset (CFO) for OFDM systems in time-varying channel,the short repetitive training sequences were inserted between any two OFDM symbols and then were used to estimate the CFO.The impact of time-varying channel on the estimation of CFO was thus reduced by decreasing the correlation interval.Simulation results showed that when the normalized Doppler frequency of time-varying channel was above 0.1,the short training sequence based method was superior in performance to the conventional cyclic prefix based one,especially so when the channel varies faster,and thus was more applicable in high mobility environments.
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      朱颜锐,田斌,安金坤,等.一种快速OFDM调制信号识别算法[J].西安电子科技大学学报,2012,39(1):17.

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      Lashkarian N,Kiaei S.Class of cyclic-based estimators for frequency-offset estimation of OFDM systems[J].IEEE Trans on Com,2000,48(12):2139.

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      Ghogho M,Ciblat P,Swami A,et al.Training design for repetitive-slot-based CFO estimation in OFDM[J].IEEE Trans on Signal Proce,2009,57(12):4958

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  • 收稿日期:  2012-07-10
  • 刊出日期:  2012-09-15
通讯作者: 陈斌, bchen63@163.com
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陈东华. 高速移动信道中的OFDM载波频偏估计[J]. 轻工学报, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
引用本文: 陈东华. 高速移动信道中的OFDM载波频偏估计[J]. 轻工学报, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
shu
CHEN Dong-hua. Carrier frequency offset estimation for OFDM in highly mobile channels[J]. Journal of Light Industry, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
Citation: CHEN Dong-hua. Carrier frequency offset estimation for OFDM in highly mobile channels[J]. Journal of Light Industry, 2012, 27(5): 99-102. doi: 10.3969/j.issn.2095-476X.2012.05.024
shu

高速移动信道中的OFDM载波频偏估计

  • 华侨大学 信息科学与工程学院, 福建 厦门 361021
  • 收稿日期: 2012-07-10
  • 网络出版日期: 2012-09-15
基金项目:  福建省自然科学基金项目(2012J05119)广西无线宽带通信与信号处理重点实验室2011年度主任基金项目(21104)华侨大学科研基金资助项目(12BS222)中央高校基本科研业务费专项资金资助(11QZR02)

摘要: 为了提高时变信道中OFDM载波频偏的估计性能,在相邻符号之间插入短时重复训练序列进行载波频偏估计,进而通过缩短相关间隔来降低信道时变对载波频偏估计的影响.仿真结果表明,当时变信道归一化多普勒频率大于0.1时,短时序列估计方法的性能优于传统循环前缀方法;而当信道变化加快时,短时序列估计方法的性能优势更加明显,更适宜高速移动环境中的载波频偏估计.

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