| 低轨天基信息定向分发区域分割编码控制方法 |
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| 引用本文： | 李献斌,王建,范广腾. 低轨天基信息定向分发区域分割编码控制方法[J]. 宇航学报, 2020, 41(5): 592-598. DOI: 10.3873/j.issn.1000-1328.2020.05.010 |
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| 作者姓名： | 李献斌 王建 范广腾 |
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| 作者单位： | 军事科学院国防科技创新研究院， 北京 100071 |
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| 基金项目： | 国家自然科学基金(61801503) |
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| 摘 要： | 为提高低轨指向性信息分发链路的频谱利用效率，从天基分发平台与地面用户的相对位置关系入手，建立了分发指向、编码增益与信道传输容量的量化关系。在此基础上，提出一种低轨天基信息定向分发区域分割编码控制方法，该方法针对不同信息分发区域，采用最小均方误差(MMSE)作为区域分割准则选择编码方式，既提升了信道传输效率也便于工程实现。最后，本文通过仿真分析了方法的效能和性能影响因素，并与现有自适应编码方法进行了对比，验证了本方法的有效性和可靠性。
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| 关 键 词： | 低轨 天基信息 定向分发 编码控制 |
| 收稿时间： | 2019-06-17 |
Area Segmentation Coding Control Method in LEO Space Information Directional Distribution |
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| LI Xian bin,WANG Jian,Fan Guang teng. Area Segmentation Coding Control Method in LEO Space Information Directional Distribution[J]. Journal of Astronautics, 2020, 41(5): 592-598. DOI: 10.3873/j.issn.1000-1328.2020.05.010 |
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| Authors: | LI Xian bin WANG Jian Fan Guang teng |
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| Affiliation: | National Innovation Institute of Defense Technology, Academy of Military Sciences, Beijing 100071，China |
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| Abstract: | In order to improve the spectral efficiency of Low Earth Orbit (LEO) directional information distribution link, this paper integrates the kernel factors that affect the link capability and establishes the quantitative relationship among the distribution direction, coding gain and channel transmission capacity. On this basis, an area segmentation coding control method is proposed. For different information distribution regions, the minimum mean square error (MMSE) is used as a region segmentation criterion to regulate the coding method, which is able to boost the channel transmission efficiency as well as facilitate practical implementation. Finally, extensive simulations are conducted to evaluate the robustness of the proposed coding control method, based on which the effectiveness and reliability of the proposed solution are highlighted compared to the existing adaptive coding methods. |
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| Keywords: | Low Earth Orbit (LEO) Space information Directional distribution Coding control |
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