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arXiv 2007.01069eess.SPcs.NI
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IRS辅助mmWave系统的联合无源波束形成和用户关联优化

Joint Passive Beamforming and User Association Optimization for IRS-assisted mmWave Systems

Dan Zhao, Hancheng Lu, Yazheng Wang, Huan Sun

摘要:

本文研究了一种智能反射面(IRS)辅助的多用户毫米波(mmWave)下行通信系统,利用IRS来减轻阻塞效应,提高mmWave系统的性能。考虑到IRS对用户关联的影响,我们通过联合优化IRS和用户关联处的无源波束形成来制定和速率最大化问题,这是一个棘手的非凸问题。然后提出了一种交替优化算法,有效地解决了问题。该算法利用分式规划方法对IRS的无源波束形成进行优化,并利用基于网络优化的拍卖算法解决用户关联问题。我们提供了所提出的算法和不同的参考算法之间的数值比较。仿真结果表明,该算法可以获得显着的增益在所有用户的和速率。

英文摘要:

In this paper, we investigate an intelligent reflect surface (IRS) assisted multi-user millimeter wave (mmWave) downlink communication system, exploiting IRS to alleviate the blockage effect and enhance the performance of the mmWave system. Considering the impact of IRS on user association, we formulate a sum rate maximization problem by jointly optimizing the passive beamforming at IRS and user association, which is an intractable non-convex problem. Then an alternating optimization algorithm is proposed to solve the problem efficiently. In the proposed algorithm, passive beamforming at IRS is optimized by utilizing the fractional programming method and user association is solved through the network optimization based auction algorithm. We provide numerical comparisons between the proposed algorithm and different reference algorithms. Simulation results demonstrate that the proposed algorithm can achieve significant gains in the sum rate of all users.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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