WCDMA下行链路扩频调制的仿真与研究

Study and Simulation of WCDMA Downlink Channel'Spread Spectrum and Modulation

本文首先简单介绍了第三代移动通信系统WCDMA扩频调制的原理及操作过程,然后利用MATLAB工具建立了WCDMA的下行链路扩频调制过程的仿真模型,最后给出了各个处理阶段信号的频谱图等仿真结果,并进行了分析,得出利用OVSF扩频码进行扩频调制能够很好地解决不同业务传送及多用户干扰的问题。

This paper firstly illustrates the theory and operational process of WCDMA Downlink channel＇spead spectrum and modulation briefly. Secondly the simulation module of WCDMA uplink channel is founded by MATLAB, then the result of the simulation is given. Based on the preceding study and simulation the conclusion that the OVSF which is used in WCDMA can primely solve the problems of the differ operation＇transmission and the differ user＇s disturbance is educed at last.