MIMO-OFDM混合系统干扰容限研究  

Research on noise tolerance in MIMO-OFDM hybrid system

作　　者：蔡方凯[1] 陈永彬[1] 

机构地区：[1]成都电子机械高等专科学校通信工程系,四川成都610031

出　　处：《重庆邮电大学学报（自然科学版）》2009年第5期587-590,594,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：四川省教育厅2007年重点项目基金(07ZA180)

摘　　要：通过对多输入多输出系统(MIMO)和正交频分复用技术(OFDM)原理的分析,研究了通信中数据高速传输与系统有限带宽之间的关系,分析了多输入多输出系统和正交频分复用技术的抗干扰性能,阐明了MIMO和OFDM混合系统具有较高的频谱利用率,是一种提高通信系统容量的有效方法。讨论了MIMO系统信道容量与天线单元之间关系,对3种MIMO-OFDM系统的抗干扰性能进行了研究,系统采用时间、频率和空间3种分集相结合的方法,使MIMO-OFDM无线通信系统干扰容限增加,仿真结果验证了该方法是可行的。The principles of the multi-input multi-output （MIMO） system and the technology of orthogonal frequency division multiplexing （OFDM） were analyzed, and the relationship between high-speed data communications and system with limited bandwidth was studied. The noise tolerance of MIMO system and OFDM technology were discussed. For the MIMO- OFDM hybrid system has a high spectral efficiency, it is an effective way to increase capacity of communication system. The relationship between the MIMO system channel capacity and the antenna element was discussed, and the anti-jamming performance of three kinds of MIMO-OFDM system was studied. The hybrid system uses the method combining time diversity, frequency diversity and space diversity to increase the noise tolerance of MIMO-OFDM wireless communication system. Simulation result shows that this method is feasible.

关 键 词：多输入多输出 正交频分复用 天线 带宽 干扰容限 

分 类 号：TN929.5[电子电信—通信与信息系统]