摘要
第三代移动通信合作伙伴组织(3GPP)提出的高速下行分组接入(HSDPA)是一种空中接口数据传输增强技术,相对长期演进(LTE)提供了WCDMA短期演进方案。HSDPA同样适于时分双工-码分多址(TDD-CDMA)系统。本文理论分析了智能天线与TDD模式、HSDPA技术结合系统的极限容量,讨论了TDD系统引入智能天线对链路质量的提升有助于HSDPA技术提高下行分组传输效率。最终讨论了基于不同3G标准向3.5G演进线路及不同实现机制的频谱利用率。
The capacity of integrated system with time division duplex （TDD） and high speed downlink packet access （HSDPA） as well as smart antenna （SA） technology is investigated. Firstly Shannon formula is extended to estimate the effect of smart antennas on channel capacity by means of introducing a gain factor. The radio link quality gain brought out by smart antennas for HSDPA is also analyzed. The HSDPA theoretic pole rate is deduced with different Modulation Coding schemes by link-level simulation. Finally, the frequency band utilization ratio of 3G and 3.5G standards is given and compared with Shannon formula to understand the mobile network evolution roadmap.
出处
《电路与系统学报》
CSCD
北大核心
2008年第1期97-101,共5页
Journal of Circuits and Systems
基金
国家"863计划"项目(2004AA123160)
