摘要
该文利用MIMO OFDM系统中宽带信道的频率选择性衰落对不同窄带子载波上传输信号的不同影响,提出了一种结合频率扩展编码(FSC)的空时码设计。仿真结果表明,与其它的MIMO OFDM系统比较,该方法不仅可以有效地利用选择性信道内在的频率分集及保证系统频谱利用率,而且结构简单,容易实现。
In this paper, a space-time coded MIMO (Multiple-Input Multiple-Output) OFDM (Orthogonal Frequency Diversion Multiplexing) system using frequency spread coding is proposed based on the fact that the fading effects of the transmitted signals on each sub-carrier are different owing to the frequency-selective fading property. The simulation results indicate that the proposed scheme not only effectively exploits the inherent frequency diversity of the frequency-selective channel and maintains the spectrum efficiency of system, but also has a low complexity and is easy to realize compared to other MIMO OFDM systems.
出处
《电子与信息学报》
EI
CSCD
北大核心
2004年第11期1799-1804,共6页
Journal of Electronics & Information Technology
基金
国家863(2001AA123011)资助