Results 241 to 250 of about 1,722,156 (269)

Hybrid Beamforming for Wideband Terahertz Massive MIMO Communications With Low-Resolution Phase Shifters and True-Time-Delay

IEEE Transactions on Wireless Communications
Hybrid beamforming has attracted considerable interest in the development of next-generation wireless communications operating in the terahertz (THz) band.
Ping-Hsiang Chang, Tzihnong Chiueh
semanticscholar   +1 more source

Adaptive Non-Uniform Hybrid Beamforming for mmWave Train-to-Ground Communications in High-Speed Railway Scenarios

IEEE Transactions on Vehicular Technology, 2023
Higher frequency bands, especially millimeter wave (mmWave), are a key enabler for future high-speed railway (HSR) wireless communication systems. Hybrid analog and digital beamforming (HBF) schemes operating at mmWave frequency bands can exploit the ...
Yiru Liu, B. Ai, Yong Niu, Zhu Han, Z. Zhong, Yu-Cong Qiao, Ning Wang, Gordon L. Stüber   +7 more
semanticscholar   +1 more source

Secure Hybrid Beamforming for IRS-Assisted Millimeter Wave Systems

IEEE Transactions on Wireless Communications, 2023
This paper investigates the secure hybrid beamforming (HB) design in an intelligent reflecting surface (IRS) assisted millimeter-wave (mmWave) system, where an IRS is deployed to help the legitimate transmission from Alice to Bob under the eavesdropping ...
Long Yang, Jiangtao Wang, Xuan Xue, Jia Shi, Yongchao Wang   +4 more
semanticscholar   +1 more source

Hybrid Beamforming Architectures of Terahertz Communications

2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2019
Hybrid beamforming technology is attractive for Terahertz (THz) communications to compensate the huge path loss, owing to the benefits of low hardware complexity and acceptable power consumption. Multiple hybrid beamforming architectures in the THz band, including the fully-connected (FC), array-of-subarray (AoSA) and dynamic array-of-subarray (DAoSA ...
Longfei Yan, Chong Han, Qing Ding
openaire   +1 more source

Neural Network-Aided Near-Field Channel Estimation for Hybrid Beamforming Systems

IEEE Transactions on Communications
Accurate channel state information is paramount for fully harnessing the benefits of massive antennas in communication systems. However, two primary challenges impede its acquisition.
Suhwan Jang, Chungyong Lee
semanticscholar   +1 more source

Electromagnetic Hybrid Beamforming for Holographic MIMO Communications

IEEE Transactions on Wireless Communications
It is well known that there is inherent radiation pattern distortion for the commercial base station antenna array, which usually needs three antenna sectors to cover the whole space.
Ran Ji, Chongwen Huang, Xiaoming Chen, Wei E. I. Sha, Linglong Dai, Jiguang He, Zhaoyang Zhang, Chau Yuen, Mérouane Debbah   +8 more
semanticscholar   +1 more source

MMSE Hybrid Beamforming for Multi-User Millimeter Wave MIMO Systems

IEEE Communications Letters, 2023
Millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) system has been recognized as a key technique for 5G communications. In terms of power consumption and hardware cost, it is hardly affordable to assign one radio frequency (RF) chain ...
Wenqian Ren, Jin Deng, Xiantao Cheng
semanticscholar   +1 more source

Energy Efficiency Enhancement in User-Centric and Cell-Free Millimeter-Wave Massive MIMO Systems With Hybrid Beamforming

IEEE Transactions on Vehicular Technology
Cell-free massive multiple-input multiple-output (CF-mMIMO) is a new and scalable network architecture that can bring antennas closer to users. In addition, hybrid beamforming can greatly reduce the power consumption by limiting the number of radio ...
Qinyuan Zheng, Pengcheng Zhu, Jiamin Li, Dongmin Wang, X. You   +4 more
semanticscholar   +1 more source

Secrecy-Energy Efficient Hybrid Beamforming for Satellite-Terrestrial Integrated Networks

IEEE Transactions on Communications, 2021
In this paper, we investigate secrecy-energy efficient hybrid beamforming (BF) schemes for a satellite-terrestrial integrated network, wherein a multibeam satellite system shares the millimeter wave spectrum with a cellular system.
Zhi Lin, Min Lin, B. Champagne, Wei-Ping Zhu, N. Al-Dhahir   +4 more
semanticscholar   +1 more source

Near-Field Channel Estimation for XL-RIS Assisted Multi-User XL-MIMO Systems: Hybrid Beamforming Architectures

IEEE Transactions on Communications
Reconfigurable intelligent surface (RIS) is an emerging technique for robust millimeter-wave (mmWave) multiple-input multiple-output (MIMO) systems. In this paper, we study the channel estimation problem for extremely large-scale RIS (XL-RIS) assisted ...
Jeongjae Lee, Hyeonjin Chung, Yunseong Cho, Sunwoo Kim, Songnam Hong   +4 more
semanticscholar   +1 more source