| 基于赋形多波束的CDMA系统容量分析 |
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| 引用本文： | 徐非,梁广,龚文斌. 基于赋形多波束的CDMA系统容量分析[J]. 微计算机应用, 2011, 32(5): 6-14 |
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| 作者姓名： | 徐非 梁广 龚文斌 |
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| 作者单位： | 1. 中科院上海微系统与信息技术研究所,上海,200050;上海微小卫星工程中心,上海,200050
2. 上海微小卫星工程中心,上海,200050 |
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| 基金项目： | 中科院创新基金，上海市自然科学基金 |
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| 摘 要： | 分析是基于赋形多波束天线波束增益模型,相对传统的二阶锥形口径增益模型,这一模型能够较好地补偿路径损耗差异,保证了覆盖区域的"等通量"覆盖。本文分别分析了星地通信系统前向链路和反向链路的系统容量,在反向链路容量分析中综合考虑了阴影衰落、功率控制误差等因素的影响,并提出了提高系统容量、改善系统性能应采取的措施方法。本文中的容量分析方法可以进一步推广到低轨通信星座系统,对低轨通信星座系统的规划和设计具有重要意义。
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| 关 键 词： | 多波束LEO卫星通信系统 波束赋形 CDMA容量 功率控制 |
Capacity Analysis of CDMA for a Formed Multi - beam LEO Satellite System |
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| XU Fei,LIANG Guang,GONG Wenbin. Capacity Analysis of CDMA for a Formed Multi - beam LEO Satellite System[J]. Microcomputer Applications, 2011, 32(5): 6-14 |
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| Authors: | XU Fei LIANG Guang GONG Wenbin |
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| Affiliation: | XU Fei1,2,LIANG Guang1,GONG Wenbin2(1Shanghai Institute of Microsystem and Information Technology,CAS,Shanghai,200050,China(2Shanghai Engineering Center for Microsatellites,China) |
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| Abstract: | The multi-beam gain model formed with the aim of isoflux coverage can counterbalance the difference of path loss practically,compared to the tranditional second-roder cone gain model.The CDMA communication capacity analysis of both downlink and uplink of a LEO satellite system was presented,based on the formed multi-beam gain model,and considering shadowing and power control error,etc.The method of increasing the communication capacity was presented as well.The analysis in this paper can be spread to the LE... |
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| Keywords: | Multi-beam LEO satellite communication Beam-forming CDMA capacity Power control |
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