基于空时编码的MB-OFDM超宽带通信系统  

MB-OFDM Ultra-wide Band Communications System Based on Space-time Code

作　　者：余萍[1] 闫峥[1] 陈思[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《通信技术》2007年第11期52-54,共3页Communications Technology

摘　　要：基于MB-OFDM(多带正交频分复用)超宽带通信系统上,采用了两种特殊的空时(频)编码结构来改善系统性能。仿真结果表明,在修正的S-V信道模型下,该系统增大了传输速率,基于空时分组编码(STBC)结构的超宽带系统在低信噪比情况下可以获得较好的分集增益,而基于预编码的空时频编码(STFC)的超宽带系统的BER性能比单天线系统的BER性能更加优异。Two kinds of special space time （frequency） coded structure are proposed to improve the performance of MB-OFDM system. The simulation results indicate that, with the modified S-V channel model, the system has been raised in channel capacity, STBC-MB-OFDM system can obtain the better diversity gain under low signal to noise ratio, while STFC-MB-OFDM based on orthogonal precoding is of better BER performance than the single antenna system.

关 键 词：超宽带 多带正交频分复用 多输入多输出 空时分组编码 空时频编码 

分 类 号：TN911.72[电子电信—通信与信息系统]