[1] GUI G, LIU M, TANG F, et al. 6G:opening new horizons for integration of comfort, security and intelligence[J]. IEEE Wireless Communications, 2020, 27(5): 126-132. [2] SEKANDER S, TABASSUM H, HOSSAIN E, et al. Multi-tier drone architecture for 5G/B5G cellular networks:challenges, trends, and prospects[J]. IEEE Communications Magazine, 2018, 56(3): 96-103. [3] 陈玉宛, 贾向东, 纪澎善, 等. 基于泊松簇过程的毫米波异构网络频谱分析[J]. 计算机工程, 2020, 46(11): 194-200. CHEN Y W, JIA X D, JI P S, et al. Spectrum analysis of millimeter wave heterogeneous network based on Poisson cluster process[J]. Computer Engineering, 2020, 46(11): 194-200.(in Chinese) [4] GAPEYENKO M, PETROV V, MOLTCHANOV D, et al. Flexible and reliable UAV-assisted backhaul operation in 5G mmWave cellular networks[J]. IEEE Journal on Selected Areas in Communications, 2018, 36(11): 2486-2496. [5] ZHANG L, ZHAO H, HOU S, et al. A survey on 5G millimeter wave communications for UAV-assisted wireless networks[J]. IEEE Access, 2019, 7:117460-117504. [6] WANG H, LI L, SONG L, et al. A linear precoding scheme for downlink multiuser MIMO precoding systems[J]. IEEE Communications Letters, 2011, 15(6): 653-655. [7] 束锋, 杨淑萍, 许正文, 等. 毫米波无线通信系统混合波束成形综述[J]. 数据采集与处理, 2017, 32(3): 454-462. SHU F, YANG S P, XU Z W, et.al. Overview of hybrid beamforming for millimeter wave systems[J]. Journal of Data Acquisition and Processing, 2017, 32(3): 454-462.(in Chinese) [8] GAO X, DAI L, HAN S, et al. Energy-efficient hybrid analog and digital precoding for mmWave MIMO systems with large antenna arrays[J]. IEEE Journal on Selected Areas in Communications, 2016, 34(4): 998-1009. [9] 黄天宇, 马林华, 胡星, 等. 一种实用的毫米波大规模MIMO混合预编码算法[J]. 电子与信息学报, 2017, 39(8): 1788-1795. HUANG T Y, MA L H, HU X, et al. Practical hybrid precoding algorithm for millimeter wave massive MIMO[J]. Journal of Electronics & Information Technology, 2017, 39(8): 1788-1795.(in Chinese) [10] LIU Y, FENG Q, WU Q, et al. Energy-efficient hybrid precoding with low complexity for mmWave massive MIMO systems[J]. IEEE Access, 2019:95021-95032. [11] VIZZIELLO A, SAVAZZI P, CHOWDHURY K R, et al. A Kalman based hybrid precoding for multi-user millimeter wave MIMO systems[J]. IEEE Access, 2018, 6:55712-55722. [12] ZHAO L, NG D W, YUAN J, et al. Multi-user precoding and channel estimation for hybrid millimeter wave systems[J]. IEEE Journal on Selected Areas in Communications, 2017, 35(7): 1576-1590. [13] 解培中, 孙锐, 李汀.基于连续干扰消除的毫米波MIMO系统混合预编码算法[J]. 电子与信息学报, 2019, 41(2): 409-416. XIE P Z, SUN R, LI D.Hybrid precoding algorithm based on successive interference cancellation for millimeter wave MIMO systems[J]. Journal of Electronics & Information Technology, 2019, 41(2): 409-416.(in Chinese) [14] DU J, XU W, DENG Y, et al. Energy-saving UAV-assisted multiuser communications with massive MIMO hybrid beamforming[J]. IEEE Communications Letters, 2020, 24(5): 1100-1104. [15] REN H, LI L, XU W, et al. Machine learning-based hybrid precoding with robust error for UAV mmWave massive MIMO[C]//Proceedings of 2019 IEEE International Conference on Communications.Washington D.C., USA:IEEE Press, 2019:1-6. [16] ZHANG C, ZHANG W, WANG W, et al. Research challenges and opportunities of UAV millimeter-wave communications[J]. IEEE Wireless Communications, 2019, 26(1): 58-62. [17] XIAO Z, DONG H, BAI L, et al. Unmanned Aerial Vehicle Base Station(UAV-BS) deployment with millimeter-wave beamforming[J]. IEEE Internet of Things Journal, 2020, 7(2): 1336-1349. [18] 何尔利, 纪澎善, 贾向东, 等. 位置协助的无人机毫米波通信网络自适应信道估计[J]. 计算机工程, 2020, 46(6): 196-201. HE E L, JI P S, JIA X D, et al. Position-aided adaptive channel estimation for mmWave communication network of UAV[J]. Computer Engineering, 2020, 46(6): 196-201.(in Chinese) [19] YANG L, ZHANG W.Hierarchical codebook and beam alignment for UAV communications[C]//Proceedings of 2018 IEEE GLOBECOM Workshops.Washington D.C., USA:IEEE Press, 2018:1-6. [20] ZHANG Z, CHAN S C, TSUI K M, et al. A recursive frequency estimator using linear prediction and a Kalman-filter-based iterative algorithm[J]. IEEE Transactions on Circuits and Systems Ⅱ:Express Briefs, 2008, 55(6): 576-580. |