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arXiv 2609.34728cs.ITmath.IT

基于DNN驱动的信道不确定性学习的SAGIN鲁棒资源管理

Robust Resource Management for SAGIN using DNN-Driven Channel Uncertainty Learning

  • Shaanxi Normal University(陕西师范大学)
  • Xidian University(西安电子科技大学)
  • Guangzhou Institute Technology, Xidian University(西安电子科技大学广州研究院)
  • University of Macau(澳门大学)

机构由 AI 辅助整理,请以论文原文为准。

Haonan Zhang, Weihua Wu, Qi Zhang, Runzi Liu, Zewei Jing, Weijia Han

AI总结:

针对SAGIN中CSI不确定下的鲁棒波束成形与资源分配问题,提出DNN驱动的信道不确定性学习方法,构建非对称不确定性集并采用鲁棒对应方法,实现高能效与高可靠性的联合优化。

AI中文摘要:

本文研究了在信道状态信息(CSI)不确定条件下,空间-空中-地面一体化网络(SAGIN)中的联合鲁棒波束成形与资源分配问题。在SAGIN中,不确定的CSI会削弱波束成形和资源分配的精确调整,对满足异构用户的严格服务质量(QoS)要求构成重大挑战。为应对这一挑战,我们首先构建了一个机会约束优化问题,在预定义的中断概率下,以最小化总发射功率并满足QoS要求为目标。通过利用半定松弛(SDR),目标函数被转化为波束成形矩阵迹的线性函数。随后,我们提出了一种基于深度神经网络(DNN)驱动的信道不确定性学习方法,动态学习并将不确定的CSI建模为非对称不确定性集。在构建的CSI不确定性集下,开发了一种基于预训练网络参数的鲁棒对应方法,该方法将不确定性集表征为有限个凸集的并集,从而为原始机会约束提供了可处理的近似。最后,我们设计了一种自适应迭代算法,以联合优化资源分配和波束成形向量。仿真结果表明,我们提出的DNN驱动方法优于传统的鲁棒和非鲁棒方法,在SAGIN中实现了更高的能量效率和鲁棒可靠性。

英文摘要:

This paper focuses on the joint robust beamforming and resource allocation for space-air-ground integrated networks (SAGIN) under uncertain channel state information (CSI). In SAGIN, uncertain CSI undermines the precise adjustment of beamforming and resource allocation, posing a major challenge to meeting heterogeneous users' strict quality of service (QoS) requirements. To address this challenge, we first formulate a chance-constrained optimization problem to minimize the total transmit power while satisfying QoS requirements under a predefined outage probability. By leveraging semidefinite relaxation (SDR), the objective function is transformed into a linear function of the traces of the beamforming matrices. Then, we propose a deep neural network (DNN)-driven channel uncertainty learning to dynamically learn and model the uncertain CSI as an asymmetric uncertainty set. Under the constructed CSI uncertainty set, a robust counterpart method based on pre-trained network parameters is developed. It characterizes the uncertainty set as a finite union of convex sets, thereby providing a tractable approximation for the original chance constraints. Finally, we design an adaptive iterative algorithm to jointly optimize the resource allocation and beamforming vectors. Simulation results show that our proposed DNN-driven method outperforms traditional robust and non-robust methods, achieving a superior energy efficiency and robust reliability in SAGIN.

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