| Ka频段双圆极化频率复用的星地数传链路分析 |
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| 引用本文： | 王中果,汪大宝,曹京,汤海涛,田志新.Ka频段双圆极化频率复用的星地数传链路分析[J].航天器工程,2013(5):85-92. |
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| 作者姓名： | 王中果 汪大宝 曹京 汤海涛 田志新 |
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| 作者单位： | 北京空间飞行器总体设计部,北京100094 |
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| 摘 要： | 为进一步提高低轨遥感卫星数据的下传速率,文章采用国际电信联盟(ITU)的星地链路计算模型,对Ka频段双圆极化频率复用(简称"极化复用")的雨衰和去极化效应进行了定量影响分析。分析结果表明:采用Ka频段同频极化复用具备可行性,通道传输速率达6Gbit/s,可有效解决海量数据的下传难题;但只有建立在干旱少雨的地面站(如喀什站),才能实现95%的链路可用率,而对降雨量中等的地面站(如北京站),则无法实现95%的链路可用率。
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| 关 键 词： | 低轨遥感卫星 Ka频段 双圆极化频率复用 星地数据传输 |
Analysis of Satellite-to-Earth Data Transmission Link Utilizing Dual Circularly Polarized Frequency Reuse at Ka-band |
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| WANG Zhongguo,WANG Dabao,CAO Jing,TANG Haitao,TIAN Zhixin.Analysis of Satellite-to-Earth Data Transmission Link Utilizing Dual Circularly Polarized Frequency Reuse at Ka-band[J].Spacecraft Engineering,2013(5):85-92. |
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| Authors: | WANG Zhongguo WANG Dabao CAO Jing TANG Haitao TIAN Zhixin |
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| Institution: | (Beijing Institute of Spacecraft System Engineering, Beijing 100094, China) |
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| Abstract: | To increase the data transmission rate of LEO remote sensing satellite further, this pa- per adopts the satellite-to-Earth propagation model proposed by ITU（International Telecommuni- cations Union）, and analyzes quantitatively the rain attenuation and cross-polarization effect of dual circularly polarized system caused by rain. Analysis results show that it is feasible to trans- mit at Ka-band by utilizing dual circularly polarized frequency reuse technique, and the transmis- sion rate can reach 6Gbit/s, which can solve the problem of mass data transmission. However, the link availability can reach 95% only when the ground station locates in droughty area such as Kashi, and be less than 95% in pluvious area such as Beijing. |
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| Keywords: | LEO remote sensing satellite~ Ka-band~ dual circularly polarized frequency reuse~satellite-to-Earth data transmission |
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