Onboard Beam Generation for Multibeam Satellite Systems
Onboard Beam Generation for Multibeam Satellite Systems
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DOI：
10.1109/twc.2017.2687924
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发表时间：
2015-06
影响因子：
10.4
通讯作者：
Vahid Joroughi;M. Vázquez;A. Pérez-Neira;B. Devillers
中科院分区：
文献类型：
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作者：
Vahid Joroughi;M. Vázquez;A. Pérez-Neira;B. Devillers
本文旨在设计一种机载多波束卫星混合结构的机载波束产生过程。与纯地面系统相比，所提出的方法在总吞吐量和馈线链路带宽要求之间提供了很好的权衡。考虑了波束之间的全频率复用，并在卫星上设计了支持干扰抑制技术的波束形成。此外，为了降低有效载荷成本和复杂性，该机载波束形成被假设为恒定且对于前向链路和返回链路传输相同，以便相同的阵列馈送反射器可以用于前向链路和返回链路，从而导致有效载荷质量的大幅减少。为了满足这些要求，提出了一种鲁棒最小均方误差优化方法。所考虑的方案的好处是相对于目前的方法进行了分析和数值评估。事实上，我们的研究表明，在DVB-RCS和DVB-S2标准下，我们的提案允许在回程和转发链路中分别增加6%到15%的总吞吐量，相对于其他机载处理技术。
This paper aims at designing an onboard beam generation process for a hybrid onboard on-ground multibeam satellite architecture. The proposed method offers a good tradeoff between total throughput and feeder link bandwidth requirements compared with pure on-ground systems. Full frequency reuse among beams is considered, and the beamforming at the satellite is designed for supporting interference mitigation techniques. In addition, in order to reduce the payload cost and complexity, this onboard beamforming is assumed to be constant and the same for forward and return link transmissions so that the same array-fed reflector can be used for forward and return links, leading to a substantial reduction of the payload mass. To meet all these requirements, a novel robust minimum mean square error optimization is conceived. The benefits of the considered scheme are evaluated with respect to the current approaches both analytically and numerically. Indeed, we show that with the DVB-RCS and DVB-S2 standards, our proposal allows increasing the total throughput within a range between 6% and 15% with respect to other onboard processing techniques in the return and forward link, respectively.