The technology of Orthogonal Frequency Division Multiplexing (OFDM) has been applied widely in the transmission of high-speed data,especially in wireless access and mobile communication,where OFDM has very wide perspectives. The commonly used CP-OFDM system decreases channel information capacity because of introducing the cyclic prefix. It studies a new method to implement OFDM,this is OFDM/OQAM,the spectrum of the system better limits in the system bandwidth internal than CP-OFDM system and it can resist various interference better than commonly used OFDM. The fundamental of OFDM/OQAM system was briefly introduced,from using MATLAB software,compare with and analyze the performance between CP-OFDM system and OFDM/OQAM system. At the same time the result of simulation is given. The results indicate that the performance of the OFDM/OQAM system is superior to the tradi-tional OFDM system and has good BER performance.% 正交频分复用(OFDM)技术在高速数据传输中得到了普遍的应用,尤其是在无线接入和移动通信中的应用前景十分广泛。常用的CP-OFDM系统由于在其中加入了循环前缀,则减少了系统信道的信息容量。文中研究了一种最新的实现OFDM的方法,就是OFDM/OQAM,其系统的频谱比 CP-OFDM 系统更好地限制在系统带宽内部,所以能比常用的OFDM更好地消除各种干扰。在介绍了OFDM/OQAM的基本原理之后,利用MATLAB对CP-OFDM系统和OFDM/OQAM系统的性能进行了对比和分析。仿真结果表明,OFDM/OQAM系统的性能优于传统的OFDM系统,并具有良好的误码性能。
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