面向深空时变信道的数据传输策略

发布时间：2018-06-25 08:30

  本文选题：深空通信 + Ka频段　； 参考：《宇航学报》2016年02期

【摘要】：将呈现随机"好"、"坏"状态跳变的深空Ka频段链路噪声温度建模为两状态Gilbert-Elliot信道,考虑深空下行发送端只能获得延迟的信道状态信息(CSI)的限制,结合部分观测马尔科夫决策理论设计了基于延迟CSI预测信道状态的自适应最大化吞吐量传输策略。理论推导了在深空通信环境下最优传输策略的关键阈值,并给出了简化的闭合解计算式。通过地球-火星通信参数仿真,校验了该方案能有效提高吞吐量,提高文件传输效率。
[Abstract]:The link noise temperature in deep space Ka band with random "good" and "bad" state jump is modeled as a two-state Gilbert-Elliot channel, considering the limitation that the downlink transmitter in deep space can only obtain delayed channel state information (CSI). Combined with partial observation Markov decision theory, adaptive maximum throughput transmission strategy based on delayed CSI prediction channel state is designed. The key threshold of optimal transmission strategy in deep space communication environment is derived theoretically, and a simplified closed solution formula is given. Through the simulation of earth-Mars communication parameters, it is verified that this scheme can effectively improve the throughput and file transfer efficiency.
【作者单位】： 哈尔滨工业大学深圳研究生院;肇庆学院电子信息与机电工程学院;
【基金】：国家自然科学基金(61201144;61371102);国家自然科学基金重大研究计划(91338112) 国家高技术研究发展计划(2014AA01A704)
【分类号】：V443.1
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本文编号：2065309