论文标题

地理有效载荷功率最小化:联合编码和梁跳设计

GEO Payload Power Minimization: Joint Precoding and Beam Hopping Design

论文作者

Ha, Vu Nguyen, Nguyen, Ti Ti, Lagunas, Eva, Duncan, Juan Carlos Merlano, Chatzinotas, Symeon

论文摘要

本文旨在共同确定GEO卫星通信系统的线性预编码(LP)向量,梁跳(BH)和离散的DVB-S2X传输速率,以最大程度地减少有效载荷功耗并满足时间窗口内的地面用户的需求。关于每个时间插槽的最大光束梁数量的限制,技术要求被提出为稀疏优化问题,其中与硬件相关的光束照明能量以LP载体的稀疏形式建模。为了应对这个问题,采用压缩感应方法将稀疏部分转化为二次形式的预编码器。然后,开发了一种基于迭代窗口的算法,以将LP向量顺序更新为有效的解决方案。此外,还提出了另外两个两相框架以进行比较。在第一阶段,这些方法旨在确定使用启发式方法或DNN工具来满足用户的MODCOD传输方案。在第二阶段,每个时间插槽的LP向量将根据确定的MODCOD方案分别优化。

This paper aims to jointly determine linear precoding (LP) vectors, beam hopping (BH), and discrete DVB-S2X transmission rates for the GEO satellite communication systems to minimize the payload power consumption and satisfy ground users' demands within a time window. Regarding constraint on the maximum number of illuminated beams per time slot, the technical requirement is formulated as a sparse optimization problem in which the hardware-related beam illumination energy is modeled in a sparsity form of the LP vectors. To cope with this problem, the compressed sensing method is employed to transform the sparsity parts into the quadratic form of precoders. Then, an iterative window-based algorithm is developed to update the LP vectors sequentially to an efficient solution. Additionally, two other two-phase frameworks are also proposed for comparison purposes. In the first phase, these methods aim to determine the MODCOD transmission schemes for users to meet their demands by using a heuristic approach or DNN tool. In the second phase, the LP vectors of each time slot will be optimized separately based on the determined MODCOD schemes.

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