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基于OFDM星载交换的星地下行链路跨层设计

Downlink Cross-layer Design for On-board Switch OFDM Based Scheme
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摘要 该文基于一种全新的基于OFDM的星载交换方案,给出了此星载交换方案的星地下行链路跨层设计工作流程和相关实现方法,此方法根据星地下行链路信号发射功率上限、关于每个地面设备的当前点波束星地下行链路信道状态、每个星地下行链路传输业务目的地、业务类型、业务传输速率要求等参数,实现在属于不同地面设备的各个星地下行链路传输业务之间自适应分配子载波并自适应配置每个子载波的调制制式,生成每个传输业务与子载波的对应关系,充分利用链路资源并满足传输业务的QoS要求。 This paper proposes an downlink cross-layer design procedure and algorithm for On-board switch scheme based on OFDM. The ultimate objective is to maximize the system downlink throughput subject to spot beam downlink transmit power constraint, downlink channel state information about each user, bit error ratio requirement of subcarrier after signal detection by users, and destination user and QoS of each service. The algorithm can adaptively allocate subcarriers and chose modulation scheme for every subcarrier among different users and services. Simulation results show that the proposed algorithm is able to guarantee consistent degree of QoS for the same service.
作者 党军宏 晏坚 曹志刚
机构地区 清华大学电子工程系
出处 《电子与信息学报》 EI CSCD 北大核心 2010年第2期301-306,共6页 Journal of Electronics & Information Technology
基金 国家高技术研究发展计划(2007AA01z2b6)资助课题
关键词 正交频分复用 星载交换 星地下行链路 跨层设计 OFDM On-board switch Downlink Cross-layer design
分类号 TN927 [电子电信—通信与信息系统]
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参考文献10

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共引文献11

电子与信息学报
2010年 第2期

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