| 引用本文: | 王静,姚秀娟,高翔,等.降雨损耗对Q频段地球静止轨道下行链路I/N分布的影响[J].国防科技大学学报,2023,45(1):129-135.[点击复制] |
| WANG Jing,YAO Xiujuan,GAO Xiang,et al.Influence of rain attenuation on the I/N distribution of Q-band geostationary satellite orbit downlink[J].Journal of National University of Defense Technology,2023,45(1):129-135[点击复制] |
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| 降雨损耗对Q频段地球静止轨道下行链路I/N分布的影响 |
| 王静1,姚秀娟1,高翔1,智佳1,陈托1,董苏惠1,2,孙云龙1 |
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(1. 中国科学院国家空间科学中心 复杂航天系统电子信息技术重点实验室, 北京 100190;2. 中国科学院大学 电子电气与通信工程学院, 北京 100049 )
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| 摘要: |
| 针对Q频段通信链路受降雨、云雾及大气吸收等天气条件影响较大的传播特性,基于对Q频段地球静止轨道卫星下行链路传播损耗的分析,研究降雨损耗在地球站共址的干扰场景下对I/N分布的影响。提出与降雨分布相结合的Q频段下行链路传播损耗计算方法,建立基于降雨衰减超出门限值的时间百分比p%的I/N函数模型,分析p%对I/N分布的影响,预测年均干扰分布情况。采用该计算方法对ITU实际登记的CHINASAT-G-115.5E卫星网络进行分析,结果表明:p%越低,通信链路受降雨衰减的影响越明显。当p＜0.5时,衰减门限值变化较快；在地球站和干扰卫星轨道经度固定的情况下,p%越小,年均1-p%时间内I/N的最小值越小。该方法可应用到研究其他轨道卫星的干扰分布中,为干扰规避提供参考。 |
| 关键词: 频率重叠 降雨衰减 Q频段 干扰计算 下行链路 |
| DOI：10.11887/j.cn.202301014 |
| 投稿日期：2021-04-01 |
| 基金项目:中科院复杂航天系统电子信息技术重点实验室择优基金资助项目(Y42613A32S) |
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| Influence of rain attenuation on the I/N distribution of Q-band geostationary satellite orbit downlink |
| WANG Jing1, YAO Xiujuan1, GAO Xiang1, ZHI Jia1, CHEN Tuo1, DONG Suhui1,2, SUN Yunlong1 |
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(1. Key Laboratory of Electronics and Information Technology for Complex Space Systems, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China)
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| Abstract: |
| In view of the propagation characteristics of Q-band communication links that were severely affected by conditions such as rainfall, fog and atmospheric absorption, based on the analysis of the propagation loss of the Q-band geostationary satellite orbit downlink, the influence of rainfall attenuation on the I/N distribution under the interference scenario of the earth station co-location was studied. A method to calculate the propagation loss of Q-band downlink combined with rainfall distribution was proposed, and a functional model for I/N combined p% that the percentage of time when rainfall attenuation exceeds a threshold value was established. The influence of p% on the distribution of I/N was analyzed, and the average annual interference distribution was forecast. This method was used to analyze the influence of the CHINASAT-G-115.5E satellite network which was registered by the ITU, and the results show that the lower the p%, the more obvious the influence of rain attenuation on the communication link. When p＜0.5, the attenuation threshold changes faster. When the location of earth station and the orbit longitude of the interfering satellite are fixed, the smaller the p%, the smaller the minimum value of I/N in the annual average 1-p% time. This method can be applied to study the interference distribution of other orbital satellites, and provide a reference for interference avoidance. |
| Keywords: frequency overlap rainfall attenuation Q-band interference calculation downlink |
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