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Link budget assessment for GEO feeder links based on optical technology
International Journal of Satellite Communications and Networking ( IF 1.7 ) Pub Date : 2020-08-07 , DOI: 10.1002/sat.1371
Ricardo Barrios 1 , Svilen Dimitrov 2 , Ramon Mata‐Calvo 2 , Dirk Giggenbach 2
Affiliation  

Nowadays, large geostationary orbit (GEO) satellites can offer capacities up to 260 Gbps. In the midterm, in order to cope with the forecasted traffic demand, multibeam high throughput satellite systems are already being deployed. Optical GEO feeder link technology may provide transmission data rates up to the order of several terabits per second by making use of wavelength division multiplexing schemes. This work identifies physical layer techniques that enable the transmission of DVB‐S2X RF modulated signals over optical carriers. The techniques reported here are the analog transparent (AT), digital transparent (DT), and the digital regenerative schemes, which require different satellite payload architectures. The effects of atmospheric turbulence over the traveling wave are addressed and discussed, along with a methodology to calculate the link budget in the feeder uplink channel. Link budget calculations for two different selected ground station locations are presented, for the both the AT and DT options. It is shown that for high altitude locations, the transmission using the AT and DT options works well. For midaltitude locations, typical 36 MHz signal are feasible, whereas for higher bandwidths, the DT option could work when an error correction code is used.

中文翻译:

基于光学技术的GEO馈线链路的链路预算评估

如今,大型对地静止轨道(GEO)卫星可以提供高达260 Gbps的容量。在中期,为了应付预测的交通需求,已经部署了多光束高通量卫星系统。光学GEO馈线链路技术可以利用波分复用方案,提供高达每秒数兆兆比特的传输数据速率。这项工作确定了物理层技术,这些技术使DVB‐S2X RF调制信号能够在光载波上传输。这里报道的技术是模拟透明(AT),数字透明(DT)和数字再生方案,它们需要不同的卫星有效载荷架构。讨论并讨论了大气湍流对行波的影响,以及在馈线上行链路信道中计算链路预算的方法。针对AT和DT选项,介绍了两个不同的选定地面站位置的链路预算计算。结果表明,对于高海拔地区,使用AT和DT选项的传输效果很好。对于中海拔位置,典型的36 MHz信号是可行的,而对于更高的带宽,当使用纠错码时,DT选项可能会起作用。
更新日期:2020-08-07
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