{"title":"Deep Q-Network Enabled Low Complexity Beam Alignment for mmWave Massive MIMO System","authors":"Jing Xu;Hua Zhang;Simeng Fan;Wujie Fan","doi":"10.1109/LCOMM.2025.3560334","DOIUrl":null,"url":null,"abstract":"In this letter, we model the beam alignment problem in millimeter-wave massive MIMO system as a Markov decision process. Given the highly dynamic environment, we leverage deep reinforcement learning to solve the non-convex beam alignment problem. Specifically, by leveraging the locations of the target vehicle and its neighboring vehicles, we propose a deep Q-network (DQN)-based beam alignment algorithm with lower computation complexity. In addition, to address the issue of model obsolescence caused by the changed traffic density, an online mode is elaborated to dynamically adjust to changing environments. Simulation results show that the proposed DQN scheme has better alignment performance and lower complexity than the existing baseline schemes.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1320-1324"},"PeriodicalIF":4.4000,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Communications Letters","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10964372/","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"TELECOMMUNICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
In this letter, we model the beam alignment problem in millimeter-wave massive MIMO system as a Markov decision process. Given the highly dynamic environment, we leverage deep reinforcement learning to solve the non-convex beam alignment problem. Specifically, by leveraging the locations of the target vehicle and its neighboring vehicles, we propose a deep Q-network (DQN)-based beam alignment algorithm with lower computation complexity. In addition, to address the issue of model obsolescence caused by the changed traffic density, an online mode is elaborated to dynamically adjust to changing environments. Simulation results show that the proposed DQN scheme has better alignment performance and lower complexity than the existing baseline schemes.
期刊介绍:
The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.