电讯技术2016，Vol.56Issue(6)：618-623,6.DOI:10.3969/j.issn.1001-893x.2016.06.004
阴影衰落信道下多波束卫星移动通信系统的动态信道分配策略
A Dynamic Channel Assignment Scheme of Multi-beam Satellite Mobile Communication System in Shadowed Fading Channel
摘要
Abstract
The performance of existing dynamic channel assignment schemes is significantly degraded in shadowed fading environment. To solve the problem,the shadowed fading channel model of satellite mobile communication system is analyzed,and a new dynamic channel assignment scheme is proposed. In the pro-posed scheme, the channel is assigned according to the average interference of the sampling positions, which are chosen by predicting user’ s trajectory. Link quality restrict is also applied to avoid performance degradation in case of heavy traffic. Simulation results show that the users’ average signal-to-noise ratio (SNR) is improved by about 0. 5 dB in case of low and medium traffic,while the blocking rate is not in-creased. The proposed scheme can be adopted in land mobile satellite communication system in shadowed fading channel,in order to improve the average link performance for users.关键词
卫星移动通信/阴影衰落信道/动态信道分配/信道模型/链路质量约束Key words
satellite mobile communication/shadowed fading channel/dynamic channel assignment/chan-nel model/link quality restrict分类
信息技术与安全科学引用本文复制引用
李航,赵明,王京..阴影衰落信道下多波束卫星移动通信系统的动态信道分配策略[J].电讯技术,2016,56(6):618-623,6.基金项目
国家高技术研究发展计划(863计划)项目(2012AA01A502) （863计划）
国家科技重大专项(2013ZX03006001-005)@@@@The National High-tech R&D Program of China(863 Program)(2012AA01A502) （2013ZX03006001-005）
The National Science and Technology Major Project(2013ZX03006001-005) （2013ZX03006001-005）
