多径瑞利信道下COFDM系统的仿真  

Simulation of OFDM System under Rayleith Multipath Fading Channel

作　　者：王正强[1] 李铃远[1] 郑军[1] 徐雪慧[1] 

机构地区：[1]华中师范大学物理学院,湖北武汉430079

出　　处：《现代电子技术》2006年第9期7-9,共3页Modern Electronics Technique

摘　　要：基于系统可分思想,利用Matlab提供的Simulink仿真工具箱,研究了COFDM(CODED OFDM)在多径衰落下的性能。仿真中将二进制数据流进行RS编码并映射为QPSK信号,经过IFFT变换,形成COFDM,利用随机训练序列对信道进行估计。仿真过程以图形建模为基础,以可视化的形式给出仿真结果。最后,将无信道估计和有信道估计的仿真结果进行比较和分析。The performance of OFDM under multipath fading channels is studied, by using the Simulink simulation tools in Matlab, which is based on the theory that system is divisible. In the simulations, a binary data stream is Reed - Solomon encoding and mapped to QPSK signal,which is changed to COFDM signal after IFFT transformed. Then the channel is estimated, making use of the training sequences. The process of simulation is shown with graphics as well as the results are given by visual mode. We compare the simulation results with channel estimation and that without channel estimation and present some arguments.

关 键 词：编码正交频分复用 图形建模 多径衰落 信道估计 

分 类 号：TN914[电子电信—通信与信息系统]