| 低轨卫星通信电波传播的双线模型 |
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| 引用本文： | 王海江,皮亦鸣,付毓生,侯印鸣.低轨卫星通信电波传播的双线模型[J].电波科学学报,2007,22(1):122-125. |
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| 作者姓名： | 王海江 皮亦鸣 付毓生 侯印鸣 |
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| 作者单位： | 1. 电子科技大学电子工程学院,四川,成都,610054;成都信息工程学院,四川,成都,610225
2. 电子科技大学电子工程学院,四川,成都,610054 |
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| 基金项目： | 电子科技大学博士点专项科研基金，电子科技大学校科研和教改项目 |
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| 摘 要： | 从陆地移动通信中电波传播的双线模型出发,根据低轨卫星通信的特点,提出了一种适用于低轨卫星通信电波传播的双线模型.通过对模型的分析和计算,得出了自由空间衰减随卫星仰角变化的规律.在仿真过程中,假设了接收机在卫星轨道面内和轨道面外两种情况,分别对TE波和TM波的路径增益进行了讨论.结果表明,由于地面反射的存在,自由空间的衰减在只有直视路径的基础上产生了起伏振荡.合理利用这些规律,对于低轨卫星信道建模和卫星通信接收机设计具有一定价值.
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| 关 键 词： | 低轨卫星 双线模型 自由空间衰减 地面反射 |
| 文章编号： | 1005-0388（2007）01-0122-05 |
| 收稿时间： | 2005-07-20 |
| 修稿时间： | 2005年7月20日 |
Two-ray model for low-orbit satellite communication |
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| WANG Hai-jiang,PI Yi-ming,FU Yu-sheng,HOU Yin-ming.Two-ray model for low-orbit satellite communication[J].Chinese Journal of Radio Science,2007,22(1):122-125. |
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| Authors: | WANG Hai-jiang PI Yi-ming FU Yu-sheng HOU Yin-ming |
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| Affiliation: | 1. Electronics engineering college, University of Electronic Science and Technology of China, Chengdu Sichuan 610054, China; 2. Chengdu University of Information Technology, Chengdu Sichuan 610225, China |
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| Abstract: | Based on the two-ray model for land mobile communication, a new two- ray model which is suitable for the low-orbit satellite communication is presented and the relation of space attenuation with the satellite elevation is deduced in this paper. For two cases of the receiver in and out of the orbit plane, the path gain of TE and TM wave is discussed in the procedure of simulation, respectively. It is proved that the path gain has rippled due to reflection of the ground. The conclusions presented are useful for channel modeling and receiver design of the Low-orbit satellite communications. |
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| Keywords: | low-orbit satellite two-ray model path gain reflection of the ground |
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