A Dual‐Programmable Metasurface with Duplex Beam Steering for Full‐Space Terahertz Communications
Laser &Photonics Reviews, EarlyView.A dual‐programmable terahertz metasurface enables independent control of transmission and reflection beam steering. It breaks through the limitations in resonant tunability by polarization allocation with 2D‐electron‐gas tuning, enabling a single resonator to incorporate bidirectional operating modes.
Luyang Wang +15 more
wiley +1 more source
Optimization of Massive Full-Dimensional MIMO for Positioning and Communication
, 2017 Massive Full-Dimensional multiple-input multiple-output (FD-MIMO) base stations (BSs) have the potential to bring multiplexing and coverage gains by means of three-dimensional (3D) beamforming.
Jeong, Seongah +2 more
core +1 more source
Contextual Beamforming: Exploiting Location and AI for Enhanced Wireless Telecommunication Performance [PDF]
arXiv, 2023 The pervasive nature of wireless telecommunication has made it the foundation for mainstream technologies like automation, smart vehicles, virtual reality, and unmanned aerial vehicles. As these technologies experience widespread adoption in our daily lives, ensuring the reliable performance of cellular networks in mobile scenarios has become a ...
arxiv
Multi-Group Multicast Beamforming: Optimal Structure and Efficient Algorithms [PDF]
, 2019 This paper considers the multi-group multicast beamforming optimization problem, for which the optimal solution has been unknown due to the non-convex and NP-hard nature of the problem. By utilizing the successive convex approximation numerical method and Lagrangian duality, we obtain the optimal multicast beamforming solution structure for both the ...
arxiv +1 more source
Efficient Design for Multi-user Downlink Beamforming with Reconfigurable Intelligent Surface [PDF]
arXiv, 2023 This paper considers downlink multi-user transmission facilitated by a reconfigurable intelligent surface (RIS). First, focusing on the multi-group multicast beamforming scenario, we develop a fast and scalable algorithm for the joint base station (BS) and RIS beamforming optimization to minimize the transmit power subject to the user quality-of ...
arxiv
Beamforming for MISO Interference Channels with QoS and RF Energy Transfer [PDF]
S. Timotheou, I. Krikidis, G. Zheng, and B. Ottersten,
"Beamforming for MISO Interference Channels with QoS and RF Energy Transfer,"
IEEE Transactions on Wireless Communications, vol.13, no.5, pp.2646--2658,
May 2014, 2013 We consider a multiuser multiple-input single-output interference channel where the receivers are characterized by both quality-of-service (QoS) and radio-frequency (RF) energy harvesting (EH) constraints. We consider the power splitting RF-EH technique where each receiver divides the received signal into two parts a) for information decoding and b ...
arxiv +1 more source
Constrained Channel Decomposition-Based Hybrid Beamforming for mmWave Massive MIMO Systems
IEEE Open Journal of the Communications Society, 2020 In this article, we propose a hybrid beamforming design for multiuser mmWave massive MIMO systems. We adopt a two-stage approach for designing the analog and digital beamforming separately. The analog beamforming design is based on a constrained low-rank
Guilherme Martignago Zilli, Wei-Ping Zhu
doaj +1 more source
Cognitive Beamforming for Multiple Secondary Data Streams With Individual SNR Constraints
, 2013 In this paper, we consider cognitive beamforming for multiple secondary data streams subject to individual signal-to-noise ratio (SNR) requirements for each secondary data stream.
Cai, Sheng-Ming, Gong, Yi
core +1 more source
Robust beamforming design for UAV communications based on integrated sensing and communication
EURASIP Journal on Wireless Communications and Networking, 2023 Integrated sensing and communication (ISAC) has been a promising technique in various wireless communication applications. In this paper, we investigate a beamforming design method based on ISAC waveforms in unmanned aerial vehicle (UAV) communications ...
Haolin Zhang +4 more
doaj +1 more source
Deep Reinforcement Learning-Based Coordinated Beamforming for mmWave Massive MIMO Vehicular Networks
Sensors, 2023 As a critical enabler for beyond fifth-generation (B5G) technology, millimeter wave (mmWave) beamforming for mmWave has been studied for many years. Multi-input multi-output (MIMO) system, which is the baseline for beamforming operation, rely heavily on ...
Pulok Tarafder, Wooyeol Choi
doaj +1 more source