摘要
多输入多输出天线系统(multiple input multiple-output,简称MIMO)通过实现全分集,可以大幅度提高通信系统的质量;但是其作为一种窄带技术,只适用于频率平坦性信道,对多径衰落无能为力。本文提出了将正交频分复用(orthogonal frequency division multiplexing,简称OFDM)与MIMO相结合的方案,建立了二者相结合的STC-OFDM系统模型,给出了该系统的空时编码方案,并利用MATLAB软件对STBC-OFDM系统的性能进行了仿真。仿真结果表明,结合后的STBC-OFDM系统与传统的OFDM系统相比,其可靠性获得了提升。
Quality of communication system can be improved greatly by multiple input and multiple output through achieving full diversity,but it is a narrow band technology,only is applicable to frequency flat channel,and is incapable to the multipath fading.So the scheme combining MIMO with OFDM was proposed in the paper.The system model of a combination of the two STC-OFDM was established,and the scheme of the system＇s space-time coding was given.The system performance was simulated by using MATLAB software,the simulation results showed that reliability promotion of the STBC-OFDM system was improved greatly than that of the traditional OFDM system.
出处
《新技术新工艺》
2014年第2期95-97,共3页
New Technology & New Process
基金
国家自然科学基金资助项目(11105003)
陕西省科技厅基金资助项目(2012JQ1005)
陕西省教育厅资助项目(11JK0847
