发表机构
University of Luxembourg; University of Rome Tor Vergata（卢森堡大学; 罗马托尔维加塔大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对太阳能供电无小区LEO下行链路，提出电池感知速率分裂多址接入（BA-RSMA），通过Lyapunov队列耦合功率分配与储能，在极小能效损失下显著降低电池近耗尽率。
AI 中文摘要
无小区低地球轨道（LEO）卫星下行链路可改善覆盖范围和宏分集，但间歇性太阳能采集和有限的机载电池可能使仅通信的资源分配在能量上过于激进。我们针对固定簇太阳能供电无小区LEO下行链路，开发了电池感知单层速率分裂多址接入（BA-RSMA）。一个扰动的物理电池Lyapunov队列将公共/私有功率分配与存储能量耦合，而鲁棒能量因果性可抵御有界采集不确定性，并允许在电池饱和时进行采集削减。在固定预编码器标量有效信道模型下，对偶变换和二次变换产生凸的固定辅助资源分配子问题及单调交替更新。与直接非线性规划参考的数值交叉验证表明，在12个代表性时隙-状态实例上，最大相对目标差距低于$2.8\ imes10^{-7}$。在20个种子的电池压力实验中，BA-RSMA达到1.631~Mbit/J，并将平均近耗尽率从Myopic-RSMA下的24.84%降至6.82%，仅损失1.7%的能效。
英文摘要
Cell-free low Earth orbit (LEO) satellite downlinks improve coverage and macro-diversity, but intermittent solar harvesting and finite onboard batteries can make communication-only resource allocation energy-aggressive. We develop battery-aware one-layer rate-splitting multiple access (BA-RSMA) for a fixed-cluster solar-powered cell-free LEO downlink. A perturbed physical-battery Lyapunov queue couples common/private power allocation to stored energy, while robust energy causality protects against bounded harvesting uncertainty and allows harvest curtailment at battery saturation. Under a fixed-precoder scalar effective-channel model, dual and quadratic transforms yield convex fixed-auxiliary resource-allocation subproblems and monotonic alternating updates. Numerical cross-validation against a direct nonlinear-programming reference gives a maximum relative objective gap below $2.8\times10^{-7}$ over 12 representative slot--state instances. In a 20-seed battery-stressed experiment, BA-RSMA achieves 1.631~Mbit/J and reduces mean near-depletion from 24.84\% under Myopic-RSMA to 6.82\%, at only a 1.7\% EE penalty.
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