计算机工程与应用2011，Vol.47Issue(18)：149-152,4.DOI:10.3778/j.issn.1002-8331.2011.18.043
空频码异步协作通信中的多CFO补偿
Multiple carrier frequency offset compensation in space-frequency code cooperative communications system
摘要
Abstract
To combat synchronization errors in cooperative communication,Orthogomal Frequence Digital Multiplexing(OFDM)technique is applied to achieve the full cooperative diversity and full multipath diversity for asynchronous cooperative communications, in which a kind of Space-Frequency(SF) code is used at relay nodes.Although OFDM can combat timing errors,it is very sensitive to Carrier Frequency Offset(CFO).For cooperative communication, multiple CFO makes frequency compensation difficult if not impossible. By exploiting the structure of the SF code and energy distribution characteristics of Inter-Cartier Interference(ICI), this paper proposes re-ranging the SF code at transmitter and multiple frequency shifts with corresponding FFT at receiver to combat multiple CFO effectively. Based on this, by using Q tap method, it gets a performance to close Minimum Mean Square Error(MMSE) at the cost of lower algorithm complexity.关键词
协作通信/空频码/载波频率偏移/正交频分复用技术Key words
cooperative communication/ Space-Frequency(SF) code/ Carrier Frequency Offset(CFO) /Orthogonal Frequence Digital Multiplexing(OFDM)分类
信息技术与安全科学引用本文复制引用
朱冰莲,张松,刘海丰,杨晓芳..空频码异步协作通信中的多CFO补偿[J].计算机工程与应用,2011,47(18):149-152,4.基金项目
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60872038) （the National Natural Science Foundation of China under Grant No.60872038）
重庆大学"211工程"三期创新人才培养计划建设项目(No.S-09102). （No.S-09102）
