摘要
为了改善传统GSM(globalsystemformobilecommunication)系统的性能,将基于正交频分复用的单频网技术应用到GSM系统中,提出了一种单频蜂窝网结构.在下行链路中,相邻三个基站以宏分集的方式构成单频蜂窝,向移动台广播下行数据;在上行链路中,采用选择性分集的接收方式,由接收条件最好的基站接收上行数据.仿真结果表明,这种新型网络结构减少了移动过程中的切换次数,降低了呼叫阻塞概率和掉话概率,提高了系统容量.
A novel structure of single frequency cellular network （SFCN） was proposed to improve the performance of traditional GSM （global system for mobile communication） by applying the technique of OFDM-based single frequency network to GSM. In the downlink, adjacent three base stations worked as a macro-diversity to form a single frequency cell and broadcast downlink data to mobile stations. In the uplink, selective diversity was used to select the base station in the best receiving condition to receive uplink data. Simulation results showed that in the proposed system, handoff requests in the process of mobility were decreased, that both call blocking probability and call dropping probability were reduced, while system capacity was increased.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第8期1101-1106,共6页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(60002003)
国家"863"高技术研究发展计划资助项目(2002AA123044).
关键词
单频网(SFN)
正交频分复用(OFDM)
单频蜂窝网(SFCN)
宏分集
选择性分集
single frequency network （SFN）
orthogonal frequency division multiplexing （OFDM）
single frequency cellular network （SFCN）
macro-diversity
selective diversity
作者简介
贾会玲（1979-），女，辽宁盘锦人，博士生，主要从事无线通信网络移动管理方面的研究。E-mail：wannahealthy@sohu．com
