蜂窝移动通信系统中软硬切换衰落余量分析  

Analysis of fade margins for soft and hard hand-offs in cellular mobile communication system

作　　者：魏志刚[1] 杜惠平[1] 

机构地区：[1]重庆邮电学院,重庆400065

出　　处：《信息技术》2005年第12期44-47,共4页Information Technology

摘　　要：基于具有对数正态阴影衰落的两小区系统模型,分析了采用不同切换技术时,为满足一定的中断率系统所要求的衰落余量,并给出了详细的推导过程。仿真结果表明,在要求中断概率相同的情况下,具有有限滞后电平的硬切换所要求的衰落余量大于软切换所要求的衰落余量而小于孤立小区硬切换所要求的衰落余量,并且滞后电平越小,所需要的衰落余量就越小。Based on a two - cell system model with log - normal shadow fading, the effect of different hand - off techniques on fade margin is investigated. Simulation results show that the required fade margin for hard hand - off with a finite hysteresis level is larger than that for soft hand - off, and is smaller than that for hard handoff with an isolated cell model. It is also showed that the required fade margin is smaller as hystereis level decreases.

关 键 词：硬切换 软切换 衰落余量 

分 类 号：TN929.5[电子电信—通信与信息系统]