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Capacity Statistics Evaluation for Next Generation Broadband MEO Satellite Systems

机译：下一代宽带MEO卫星系统的容量统计评估

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摘要

In this paper, the performance of a reference medium earth orbit (MEO) satellite constellation system operating at Ka-band and employing single links to ground is compared with next generation advanced systems in higher RF or optical bands employing multiple diversity links. The fill rate of existing MEO constellations offering broadband and trunking services in Ka-band is growing fast, rendering the search for additional spectrum of vital importance. Therefore, this paper reports on the results of a system study investigating the option of using Q/V-band, or even optical wavelengths, instead of Ka-band, to deliver substantially higher system capacity. The system study takes a holistic approach covering from atmospheric channel impairments to waveform optimization and system analysis for realistic assumptions. After proposing a sophisticated channel model to generate spatio-temporal time series of atmospheric attenuation, an optimization of the performance at physical layer is performed to derive the inputs necessary to the system analysis. Five different advanced high frequency RF and optical systems are compared in terms of outage capacity and availability for various locations of single ground stations, multiple ground stations (site diversity) and from multiple satellites (orbital diversity). For maximizing the realism of the comparison, similar on board satellite resources (mass, power) are assumed for all scenarios.
机译：在本文中，将在Ka频段运行并采用单条地面链路的参考中地球轨道（MEO）卫星星座系统的性能与在更高RF或采用多分集链路的光频段中的下一代高级系统进行了比较。现有的KaO频段中提供宽带和中继服务的MEO星座的填充率正在快速增长，这使得寻找其他至关重要的频谱成为可能。因此，本文报告了一项系统研究的结果，该研究调查了使用Q / V波段甚至光波长而非Ka波段来提供更高的系统容量的选择。系统研究采用整体方法，涵盖从大气通道损伤到波形优化和系统分析的现实假设。在提出了一种复杂的信道模型以生成大气衰减的时空时间序列之后，对物理层的性能进行了优化，以得出系统分析所需的输入。比较了五个不同的高级高频RF和光学系统的中断容量和单个地面站，多个地面站（站点分集）和来自多个卫星（轨道分集）各个位置的可用性。为了使比较的真实性最大化，对于所有情况都假设了类似的机载卫星资源（质量，功率）。

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