期刊论文

中文

现代电子技术

1004-373X

2006

29

9

7-9

10.3969/j.issn.1004-373X.2006.09.003

本校为第一机构

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 esti...