摘要
分析了 CDMA 分层蜂窝移动通信系统(HCMS)网络覆盖特性,在此基础上提出了一种由宏小区和分布式天线系统(DAS)组成的双层 HCMS,即宏小区/DAS 结构,并将其与CDMA 宏小区/微小区双层蜂窝系统作了比较。网络覆盖特性分析表明,该网络结构更有利于降低网络建设和功率控制的复杂性;信干比仿真结果表明,该网络结构改善了系统的上下行链路的信干比,从而有利于提高 CDMA 蜂窝移动通信系统的系统容量。
Based on the analysis of coverage characteristics of CDMA hierarchical cellular mobile system （HCMS）, the paper proposes a two-layer HCMS which is composed of macrocells and distributed antennas system （DAS）, and presents the comparisons between this system and CDMA macrocell/microcell HCMS. The analysis of coverage characteristics shows that the proposed HCMS makes network engineering and power control easier to be performed. The results of the simulation experiment on signal to interference ratio （SIR） show that SIR in both forward and reverse links can be improved in the proposed HCMS, which helps to increase the capacity of the CDMA cellular mobile system.
出处
《高技术通讯》
EI
CAS
CSCD
北大核心
2008年第3期238-242,共5页
Chinese High Technology Letters
基金
863计划(2006AA01Z268)
国家自然科学基金重大项目(60496311)资助
关键词
CDMA
分层网络结构
分布式天线系统
远端接入单元选择
CDMA, hierarchical network structure, distributed antennas system, remote access units selection
