Multiple carrier frequency offsets compensation in Alamouti space-frequency block code cooperative communications system

Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (13): 120-122.

• 数据库、信号与信息处理 • Previous Articles Next Articles

Multiple carrier frequency offsets compensation in Alamouti space-frequency block code cooperative communications system

ZHU Binglian，ZHANG Song，LIU Haifeng，YANG Xiaofang

College of Communication Engineering，Chongqing University，Chongqing 400044，China

Received:1900-01-01 Revised:1900-01-01 Online:2011-05-01 Published:2011-05-01

Alamouti空频码协作通信中的多载波频偏补偿

朱冰莲，张松，刘海丰，杨晓芳

重庆大学通信工程学院，重庆 400044

Abstract

Abstract: In cooperative communication systems，Multiple Carrier Frequency Offsets（MCFO） appear due to the different accuracy of the nodes’ oscillators and Doppler spreads，which drastically degrades the performance of Space-Frequency Block Coded（SFBC） cooperative systems.The best amount of frequency shift is analysed，and an MCFO compensation algorithm is proposed including frequency shift and interference reconstruct.From the simulations，the proposed compensation algorithm achieves good BER performance with a large range of MCFO.

Key words: Space-Frequency Block Coded（SFBC）, cooperative communication, Orthogonal Frequency Division Multiplexing（OFDM）, Carrier Frequency Offsets（CFO）

摘要： 在协作通信系统中，各节点不同的晶振精度和多普勒扩展会带来多个载波频率偏移（MCFO），这会急剧降低空频分组码（SFBC）协作系统的性能。分析了频率搬移最佳搬移量，利用Alamouti空频码编解码简单这一特点，提出一种频率搬移和干扰重构相结合的MCFO偏移补偿算法。仿真结果表明该算法可以在较大MCFO范围内得到较好的误码率性能。

关键词: 空频分组码, 协作通信, 正交频分复用（OFDM）, 载波频率偏移

ZHU Binglian，ZHANG Song，LIU Haifeng，YANG Xiaofang. Multiple carrier frequency offsets compensation in Alamouti space-frequency block code cooperative communications system[J]. Computer Engineering and Applications, 2011, 47(13): 120-122.

朱冰莲，张松，刘海丰，杨晓芳. Alamouti空频码协作通信中的多载波频偏补偿[J]. 计算机工程与应用, 2011, 47(13): 120-122.

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Multiple carrier frequency offsets compensation in Alamouti space-frequency block code cooperative communications system

Alamouti空频码协作通信中的多载波频偏补偿

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