摘要
本文介绍了移动通信的发展历史、现状和趋势.概述了CDMA蜂窝通信系统的结构和特点,详细论述了功率功制这一关键技术的原理和过程.功率控制是CDMA系统的关键技术之一，它不仅能够克服远近效应，更重要的目的是减少用户间的多址干扰从而提高系统容量。在第三代移动通信系统中功率控制被赋予了新的要求。本文采用了基于上行链路的反向闭环功率控制来解决“远近效应”的问题，并且进行了基于步长和模糊控制的Matlab语言仿真。最后根据自己的综合研究情况，分析了移动通信的发展前景。
关键字：功率控制 远近效应 M序列 CDMA 模糊控制
The Research Of Inverse Close Loop Power-Control
Abstract
This paper introduces the history , now and the development of mobile communication. It capsulates the structure and characteristic of the CDMA cellular communications system , expounds the power control work’s principle and course of this key technology in detail. Power control is the key technology of the CDMA system , this can resolve the “near-far-effect” and what’s important is that it can increase the capacity of system by decreasing the user’s inner interference. The power control has been given the new request in the third generation of mobile communication system. This work graces this with based on up chain ’s reverse close loop power control to solve the problem of " near-far effect ", and has gone on on the basis of Matlab language emulation that control of the step and blur-control. According to my own comprehensive research situation finally , the paper analyses the development prospect of mobile communication.
key words：power control near-far effect M-code CDMA blur-control
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