摘要
OFDM技术在现代通信技术中的应用越来越广泛,因为该系统具备了多种有利于信号高效传输的优点,特别是其抗多径效应特别突出。作为OFDM系统的显著特点之一,抗多径效应使得系统传输信号的误码率大大降低。为了验证其抗衰落性能,文中分析了多径衰落信道接收信号的特点,建立了多径传播的仿真模型,利用改进的IDFT和DFT的方法,分别在两径及六径瑞利衰落信道进行传输,通过对有无OFDM系统时误差的仿真,说明了OFDM系统具有较强抗多径衰落性能的结论,并提出了一些改善系统性能的方法。
OFDM is used in modem communication technology much wider, because it has many advantages which are good for signal transmission, especially antimultipath. In order to testify its antimultipath decline characteristics, this article tells the features of multi - path decline - channel receiving signal, the foundation of multi - path broadcasting simulation model and the simulation of OFDM system by2 - path and 6 - path decline channel. The result is that OFDM system has anti - multi - path decline characteristics by means of advanced IDFY and DTF . In the end, some proposals for improving the performance of the system are offered.
出处
《计算机仿真》
CSCD
2007年第11期293-295,共3页
Computer Simulation
关键词
正交频分复用
建模
多径衰落
仿真
Orthogonal frequency division multiplexing（ OFDM ）
Modeling
Multi - path decline
Simulation
