Inter-carrier interference-free Alamouti-coded OFDM for cooperative systems with frequency offsets in non-selective fading environments

被引：11
作者：
Choi, K. [1 ]
机构：
[1] Yeungnam Univ, Dept Informat & Commun Engn, Gyungsan Si 712740, South Korea
来源：
IET COMMUNICATIONS | 2011年 / 5卷 / 15期
基金：
新加坡国家研究基金会;
关键词：
RECEIVER DESIGNS; TIME; TRANSMISSION; PERFORMANCE; CHANNEL;
D O I：
10.1049/iet-com.2011.0131
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A modified Alamouti-coded orthogonal frequency division multiplexing (OFDM) scheme is proposed for cooperative systems in non-selective fading environments. Even with the frequency offset between two distributed transmit antennas, the proposed scheme achieves ideal performance and full rate of Alamouti code. By switching subcarriers in the second OFDM symbol of each Alamouti-coded OFDM symbol pair after a simple-phase rotation in the first OFDM symbol, inter-carrier interference terms can be perfectly cancelled after a simple linear combining with the processing overhead of two times down-conversions and discrete Fourier transform (DFT) operations at each OFDM symbol.
引用
收藏
页码：2125 / 2129
页数：5
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