非合作通信中OFDM系统的载频偏移盲估计方法

doi:10.3969/j.issn.1001-2400.2016.01.005

J4 ›› 2016, Vol. 43 ›› Issue (1): 24-29.doi: 10.3969/j.issn.1001-2400.2016.01.005

非合作通信中OFDM系统的载频偏移盲估计方法

刘明骞;李兵兵;黄少东

(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，陕西西安 710071)

收稿日期:2014-07-12 出版日期:2016-02-20 发布日期:2016-04-06
通讯作者: 刘明骞
作者简介:刘明骞(1982-)，男，讲师，博士，E-mial: mqliu@mail.xidian.edu.cn．
基金资助:
国家自然科学基金资助项目(61501348, 61271299)；国家博士后科学基金资助项目(2014M562372)；国家“863”高技术研究发展计划资助项目(2007AA01Z288)；高等学校学科创新引智计划资助项目(B08038)

Blind carrier frequency offset estimation for OFDM in non-cooperative communication

LIU Mingqian;LI Bingbing;HUANG Shaodong

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China)

Received:2014-07-12 Online:2016-02-20 Published:2016-04-06
Contact: LIU Mingqian

摘要/Abstract

摘要：

针对非合作通信系统中多径信道下正交频分复用系统载波频率偏移估计性能不佳的问题，提出了一种正交频分复用系统载波频率偏移盲估计的新方法．该方法首先提出了基于正交频分复用系统子载波间幅度差值的估计代价函数；然后，推导出了基于相邻子载波间幅值乘积的代价函数；最后，对代价函数进行近似变换，并通过多项式内插方法实现了载波频率偏移的估计．仿真结果表明，在多径信道条件下，该方法不但具有良好的估计性能，而且计算复杂度较低．

关键词: 正交频分复用, 载波频率偏移, 盲估计, 多项式内插, 多径信道

Abstract:

In view of the problem of poor carrier frequency offset estimation performance over multipath channels for orthogonal frequency division multiplexing(OFDM) systems in non-cooperative communication, a new blind carrier frequency offset(CFO) estimation method is proposed. Firstly, the cost function based on the difference in amplitude is proposed. Secondly, the terminal cost function is derived by the product of the adjacent subcarrier's amplitude. Finally, the CFO estimation based on the polynomial interpolation is realized by the transformation cost function. Simulations show that the proposed CFO estimation method has a better performance and lower computational complexity over the multipath channels.

Key words: orthogonal frequency division multiplexing, carrier frequency offset, blind estimation, polynomial interpolation, multipath channels

刘明骞;李兵兵;黄少东. 非合作通信中OFDM系统的载频偏移盲估计方法[J]. J4, 2016, 43(1): 24-29.

LIU Mingqian;LI Bingbing;HUANG Shaodong. Blind carrier frequency offset estimation for OFDM in non-cooperative communication[J]. J4, 2016, 43(1): 24-29.

参考文献

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非合作通信中OFDM系统的载频偏移盲估计方法

Blind carrier frequency offset estimation for OFDM in non-cooperative communication

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