基于差分空时分组码的OFDM系统的性能分析  

Performance Analysis of OFDM System Based on Differential Space-time Block Coding

作　　者：陈静[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《中国新通信》2008年第11期31-34,共4页China New Telecommunications

摘　　要：本文介绍了差分空时分组码的编译码原理,研究了采用差分空时分组码的OFDM系统(DSTBC-OFDM)性能,仿真结果表明,DSTBC-OFDM系统的性能随着子载波数及子信道数的增加而提高。通过仿真,还证明了多天线技术与OFDM技术相结合,系统性能可得到提高,更适用于多径无线信道,而且采用差分编码技术,接收端不需要信道估计,可以大大降低接收机的复杂度。In this paper, the principle of coding and decoding for differential space-time block coding （DSTBC） is introduced and the performance of DSTBC technology combined with orthogonal frequency division multiplexing （OFDM） has been researched. The simulation results demonstrate that the performance of the system will be improved as the number of subcarriers or multi-paths increase. Moreover, by simulation it is showed that the performance of the system will be enhanced by the combination of multi-antenna and OFDM technology.. Therefore, it is well tailor for the multi-paths wireless channel. In addition, when using differential coding technology, channel estimation is not necessary in the receiver, which can reduce the complexity of the receiver.

关 键 词：多输入多输出 正交频分复用 差分空时分组码 多径信道 子载波 

分 类 号：TN919.3[电子电信—通信与信息系统]