宽带码分多址系统下行链路软切换技术的研究

Research on Soft Handover Technology of Downlink WCDMA System

本文对宽带码分多址 (WCDMA)系统下行链路的软切换技术进行了定性分析 ,引入了新的软切换参数 :切换边际值 ,并与硬切换技术进行了比较 ,此外还对软切换宏蜂窝分集效应进行了研究 。

This paper makes qualitative analysis to the performance of soft handover technology of downlink WCDMA (Wideband code division multiple access) systems, which will play an important role in the third generation mobile communication system. Taking handover margin as a criterion, it also gives a comparison between hard handover and soft handover. Moreover, the macro-diversity effect is studied in detail. At the end of this paper, some equations are derived, in which two important parameters, i.e., multipath characteristics and the user density in the cell, have close relation to the macro-diversity gain.