发表机构
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications; School of Electronic and Information Engineering, Tiangong University（北京邮电大学信息与通信工程学院; 天津工业大学电子与信息工程学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对NGSO巨型星座共存中的动态同频干扰，本文建模为非合作博弈，提出分布式注水功率控制算法，证明纳什均衡存在性，并在近直线场景下显著提升增益。
AI 中文摘要
非地球静止轨道（NGSO）巨型星座共享频谱会产生动态同频干扰。我们将两个独立、平等优先级的NGSO运营商之间的下行链路功率控制建模为非合作博弈。我们建立了一个加性弱耦合势近似，证明了纯策略纳什均衡的存在性，并推导了具有加权谱范数收敛条件的分布式注水算法。球形地球模型在链路两端应用离轴鉴别，并区分标称的卫星选择感知几何与不可避免的2°–3°近直线窗口。在K=20时，相对于无协调传输，NE增益在标称情况下为0.06%，在近直线情况下为3.91%；所有50次近直线运行均收敛，在K=50时增益达到10.41%。
英文摘要
Two non-geostationary orbit (NGSO) mega-constellations over shared spectrum leads to inter-constellation interference. Existing mitigation mainly relies on frequency/time partitioning, spatial isolation and satellite selection. However, these approaches may sacrifice resource reuse or be constrained by spatial geometry. To enable interference mitigation without centralized coordination, this letter investigates distributed power control for independent, equal-priority NGSO operators. We formulate the interaction as a non-cooperative game and propose a distributed water-filling best response using local serving-channel estimates and aggregate interference measurements. Pure-strategy Nash equilibrium existence and a weighted spectral-norm sufficient condition for uniqueness and convergence are established. Simulation results demonstrate utility gains of 3.91\% over uncoordinated transmission with 20 active beams.
