| HAPS-CDMA系统热点地区上行容量提升方案 |
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| 引用本文： | 蒋静雅,王 桁,郭道省,杨 龙.HAPS-CDMA系统热点地区上行容量提升方案[J].解放军理工大学学报,2014(6):514-518. |
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| 作者姓名： | 蒋静雅 王 桁 郭道省 杨 龙 |
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| 作者单位： | 1. 解放军理工大学 通信工程学院,江苏 南京,210007
2. 中国电子科技集团公司 第20研究所,陕西 西安,710068 |
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| 摘 要： | 为降低高空平台CDMA(HAPS-CDMA)系统干扰并提升容量,针对CDMA系统上行链路容量受干扰所限的特点,提出了一种新的双层蜂窝重叠覆盖方案。该方案在原有HAPS-CDMA系统热点小区上引入单个地面CDMA基站服务小区,形成双层蜂窝重叠覆盖系统,并通过调整引入的地面CDMA小区大小来达到最大可能减小HAPS-CDMA系统小区内干扰、提高系统容量的目的。为了更贴近实际,假设地面用户呈高斯分布。仿真结果表明,与单系统相比,该双层蜂窝系统能够较好地降低小区内的干扰,改善各层小区系统容量,尤其是热点地区容量提升最大,且在双蜂窝半径比达到特定值时各层小区均获得最佳容量改善量。
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| 关 键 词： | 高空平台 通信热点 干扰因子 系统容量 |
| 收稿时间： | 2014/6/23 0:00:00 |
Uplink capacity enhancement configuration on hotspot for HAPS-CDMA system |
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| JIANG Jingy,Wang Heng,GUO Daoxing and YANG Long.Uplink capacity enhancement configuration on hotspot for HAPS-CDMA system[J].Journal of PLA University of Science and Technology(Natural Science Edition),2014(6):514-518. |
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| Authors: | JIANG Jingy Wang Heng GUO Daoxing and YANG Long |
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| Institution: | 1. College of Communications Engineering, PLA Univ. of Sci. &Tech. , Nanjing 210007,China;
2. Twentieth Research Institute of China Electronic Technology Group Corporation,Xi'an 710068,China,1. College of Communications Engineering, PLA Univ. of Sci. &Tech. , Nanjing 210007,China;
2. Twentieth Research Institute of China Electronic Technology Group Corporation,Xi'an 710068,China,1. College of Communications Engineering, PLA Univ. of Sci. &Tech. , Nanjing 210007,China;
2. Twentieth Research Institute of China Electronic Technology Group Corporation,Xi'an 710068,China and 1. College of Communications Engineering, PLA Univ. of Sci. &Tech. , Nanjing 210007,China;
2. Twentieth Research Institute of China Electronic Technology Group Corporation,Xi'an 710068,China |
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| Abstract: | Because the uplink capacity of a cellular code division multiple access (CDMA) system is limited by interference, a novel coverage configuration of overlapped two-layer cells was proposed to reduce the interference and enhance the uplink capacity of a high altitude platform station CDMA(HAPS-CDMA) system. In the proposal, one terrestrial CDMA cell was inset to a HAPS-CDMA cell, the maximal possibility was obtained by modulating the size of the terrestrial CDMA cell to reduce the same-cell interference and enhance the system capacity. According to
practical situation, users on the ground distribute in Gaussians. Simulation results show that the proposal can reduce the same-cell interference and enhance the system capacity, especially in the hotspot district. When the radius ratio
of two different cells is in a particular value, each layer of the cells' capacity will gain the great improvement, compared with either a ground-based CDMA system or a HAPS-CDMA system. |
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| Keywords: | HAPS hotspot interference factor system capacity |
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