Analysis of downlink power allocation during soft handover in the CDMA system

被引：0
|
作者：
Li, J [1 ]
Fan, C [1 ]
Zhang, X [1 ]
Yang, DC [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Telecommun Engn, Beijing 100876, Peoples R China
来源：
PERFORMANCE CHALLENGES FOR EFFICIENT NEXT GENERATION NETWORKS, VOLS 6A-6C | 2005年 / 6A-6C卷
关键词：
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Soft handover is a key feature of the CDMA system, while downlink power allocation among the active cells is a key issue in the soft handover, which would affect the soft handover performance greatly. In this paper, a mathematical model is proposed to analyze the power allocation problem. Besides, several improved power allocation algorithms are proposed, and they can be considered as the improvement of SSDT (Site Selective Diversity Transmit), or a compromise between the conventional power allocation scheme and SSDT. Based on the proposed mathematical model, simulation is performed to evaluate the power allocation algorithms. According to the simulation results, one of the improved algorithms, called VRT (Variable Relative Threshold) algorithm, shows the best overall system performance, and it is especially suitable for the CDMA system under high traffic load.
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收藏
页码：183 / 192
页数：10
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