| 下行链路雨衰对卫星地面接收系统噪声温度和噪声功率的影响 |
| |
| 引用本文： | 范骏,徐慨,黄麟舒.下行链路雨衰对卫星地面接收系统噪声温度和噪声功率的影响[J].电子测量技术,2007,30(3):172-174. |
| |
| 作者姓名： | 范骏 徐慨 黄麟舒 |
| |
| 作者单位： | 海军工程大学,武汉,430033 |
| |
| 摘 要： | 卫星下行链路降雨除了导致信号受到衰减外,还会升高卫星地面接收机的噪声温度,从而进一步恶化卫星信道的通信质量.本文就下行链路雨衰对卫星地面接收系统噪声的影响进行了研究,并基于ITU-R推荐的降雨衰减预测模型,对一个实例进行了仿真、分析,得到了雨中噪声温度、噪声功率与极化方式、工作频率、接收天线仰角、降雨强度之间的变化关系.研究结论为估算下行链路降雨对卫星地面接收系统噪声温度和噪声功率的影响提供了较为准确的参考.
|
| 关 键 词： | 噪声温度 噪声功率 降雨衰减 |
Effect of downlink rain-fade on noise temperature and noise power of satellite ground receiving system |
| |
| Fan Jun,Xu Kai,Huang Linshu.Effect of downlink rain-fade on noise temperature and noise power of satellite ground receiving system[J].Electronic Measurement Technology,2007,30(3):172-174. |
| |
| Authors: | Fan Jun Xu Kai Huang Linshu |
| |
| Affiliation: | Naval University of Engineering,Wuhan 430033 |
| |
| Abstract: | For the downlink,raining will raise noise temperature of satellite ground receiving system as well as fade signals from a satellite,which will deteriorate communications quality of satellite channel more seriously.This paper discusses the effect of downlink rain-fade on noise of satellite ground receiving system.By simulating and analyzing an example,based on the prediction model of rain attenuation recommended by ITU-R,the relation of downlink noise temperature and noise power to polarization mode,frequency,receiving antenna elevation angle,and rainfall rate in the rain is obtained.The result is helpful in computing effect of downlink rain-fade on noise temperature and noise power of satellite ground receiving system. |
| |
| Keywords: | noise temperatures noise power rain attenuation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
