摘要
结合现代移动通信系统的主要技术,主要针对多输入多输出天线系统(Multiple-Input Multiple-Output,MIMO)、正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)技术和空时编码技术进行了研究。首先介绍了MIMO技术的发展现状和基本原理;然后介绍了OFDM技术的发展现状和基本原理,并分析该技术的优缺点,分析MIMO-OFDM系统形成的必然性及该系统的关键技术;最后介绍了3种典型空时编码技术,即分层空时码、空时网格码和空时分组码的编译码原理,并利用MATLAB软件对上述内容进行了仿真分析和比较,从而得出MIMO技术、OFDM技术和空时编码技术的结合将是未来移动通信发展的方向。
Multiple-Input Multiple-Output（MIMO）,（Orthogonal Frequency Division Multiplexing）OFDM and space-time coding technologies are studied in this paper.Firstly,the development and basic principles of MIMO system are presented.Secondly,the fundamentals of OFDM system are introduced.We also analyzed advantages and disadvantages,the inevitability,and key technologies of the MIMO-OFDM system.Finally,we discrible encoding and decoding principles of three typical space-time coding technologies,which are layered space-time coding,space-time trellis coding and space-time block coding.In each part,capacity performances or bit error performances are simulated by MATLAB,thus MIMO,OFDM and space-time code technology will be the future development direction of mobile communication.
出处
《系统仿真技术》
2010年第4期328-331,341,共5页
System Simulation Technology
关键词
多输出天线系统
正交频分复用
空时编码
分集技术
Multiple-Input Multiple-Output
Orthogonal Frequency Division Multiplexing
space-time code
diversity technology
