CDMA蜂窝通信系统的容量问题

Capacity Problems of a Cellular CDMA System

CDMA系统是干扰受限系统,其容量取决于系统内用户的相互干扰,为了不影响通话质量而使得系统容量最大化,功率控制是有效措施之一,更是系统容量最大化的基础。本文从不同角度讨论了CDMA系统的容量问题,以及功率控制对系统容量的影响。仿真表明,CDMA系统容量在无衰落和有衰落环境下差异较大,有效的功率控制技术不但能够大大降低系统干扰,还能很好地提高系统容量。

CDMA system is a interferential limited system. It's capacity is lied on the interference between users inside. Power control is one of the most useful methods which could maximize system capacity without affect service quality,and it is basic of maximizing system capacity. In this paper,it considers the capacity of CDMA system in different aspects,as well as the effect result from power control. The illustration shows that if power control is used in CDMA system,the interference could be reduced,and system...