STBC-OFDM系统在多径Nakagami-m衰落信道中的性能仿真  

Performance simulation of STBC-OFDM system over multipath Nakagami-m fading channels

作　　者：王莉[1] 张晶[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《桂林电子科技大学学报》2008年第4期294-297,共4页Journal of Guilin University of Electronic Technology

摘　　要：Nakagami-m模型作为一种通用的衰落信道模型,在通信系统的性能研究中具有重要意义。利用抽头延时线模型实现多径Nakagami-m衰落信道,结合STBC-OFDM系统仿真模型,以衰落环境、接收天线数、路径数以及调制方式四个因素为出发点对STBC-OFDM系统的BER性能进行了仿真与分析。仿真结果表明:在同一衰落情况下,两发两收STBC-OFDM系统性能优于两发一收系统,并且增加路径数以及选择适当的调制方式也能改善系统性能。Being as a general fading channel model, Nakagami-m model is of importance in studying the performance of communication systems. Tapped-delay-line representation was used to realize multipath Nakagami-m fading channel. Combined with simulation model of STBC-OFDM system, Starting from four factors including fading environments, number of receive antennas, number of channel taps and modulation mode, BER performance of STBC-OFDM system was simulated and analyzed. The simulation shows in the same fading condition the performance of 2Tx-2Rx STBC-OFDM system is better than 2Tx-1Rx system and the increasing number of channel taps and choosing appropriate modulation mode can also improve the performance of system.

关 键 词：STBC OFDM NAKAGAMI-M衰落信道 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]