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Millimeter-Wave and Terahertz Technologies for Wireless Communications, 2nd Edition
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Millimeter-Wave and Terahertz Technologies for Wireless Communications, 2nd Edition

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: 15 November 2026 | Viewed by 2298

Editors

Dr. Yong Niu

E-Mail Website
Guest Editor
School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
Interests: millimeter wave communications; device-to-device communication; medium access control; high-speed railway communications
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ke Guan

E-Mail Website
Guest Editor
State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China
Interests: measurement and modeling of wireless propagation channels; high-speed railway communications; ray-tracing and machine-learning-based digital twin of electromagnetic environments in various complex scenarios; such as vehicle-to-x communications; terahertz communication systems; integrated sensing and communications; and space–air–ground integrated networks
Special Issues, Collections and Topics in MDPI journals
Dr. Hao Jiang

E-Mail Website
Guest Editor
College of Artificial Intelligence, College of Future Technology, Nanjing University of Information Science and Technology, Nanjing 210044, China
Interests: RIS communications; channel modeling and characteristics analysis; 6G key technologies
Special Issues, Collections and Topics in MDPI journals
Dr. Zhipeng Lin

E-Mail Website
Guest Editor
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 211106, China
Interests: mmWave communications; massive MIMO; channel estimation; UAV
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Driven by the requirements of an extremely high data rate and ultra-reliability in emerging applications (e.g., autonomous vehicles, augmented reality, ultra-high-definition video conferencing and streaming), millimeter-wave (mmwave) and terahertz (THz) communications have attracted significant attention. They offer a potential solution to guaranteeing network performance, promising to support an ultra-high transmission rate, i.e., tens of Gigabits per second (Gbps) or even several Terabits per second (Tbps). However, higher carrier frequencies imply shorter propagation paths and deeper penetration losses, such that both wireless and optical technologies will play an essential role in driving their development for the upcoming 6G era. In addition, the complexity of the hardware design in mmWave/THz systems poses challenges to their practical applications and requires further exploration.

Therefore, this Special Issue seeks to identify key enabling technologies to support mmWave/THz communications. These technologies include mmWave/THz wave propagation and channel modelling, radio frequency (RF) frontend and antenna design, quality of service (QoS)/quality of experience (QoE) improvement, and mobility support, amongst others.

Topics of interests include, but are not limited to, the following:

  1. mmWave/THz wave propagation and channel modelling;
  2. High-power mmWave/THz amplifiers;
  3. RF frontend and antenna design;
  4. Channel estimation and hybrid precoding for mmWave/THz systems;
  5. Resource allocation/management and QoS/QoE improvement for mmWave/THz systems;
  6. Network architectures and protocols for mmWave/THz communications;
  7. Anti-blockage and mobility support techniques for mmWave/THz systems;
  8. Energy-efficiency and green operation for mmWave/THz systems;
  9. mmWave/THz systems integrated with AI and digital twin technologies;
  10. mmWave and THz simulators, prototyping and implementations.

Dr. Yong Niu
Prof. Dr. Ke Guan
Dr. Hao Jiang
Dr. Zhipeng Lin
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • mmWave
  • THz
  • AI
  • resource allocation
  • channel estimation
  • hybrid precoding

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Related Special Issue

Published Papers (3 papers)

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Research

18 pages, 2096 KB  
Article
Flight Dynamics Modeling and Sliding Mode Control Law Design for Oblique Wing Aircraft
by Zhuo Liu, Jie Li and He Sun
Electronics 2026, 15(16), 3532; https://doi.org/10.3390/electronics15163532 - 9 Aug 2026
Viewed by 163
Abstract
An oblique wing aircraft can continuously vary its wing sweep angle, making it attractive for high-altitude unmanned aerial vehicle (UAV) relay missions that require stable attitude, altitude, and speed for antenna pointing and air-to-ground link consistency. The present work focuses on flight-platform stability [...] Read more.
An oblique wing aircraft can continuously vary its wing sweep angle, making it attractive for high-altitude unmanned aerial vehicle (UAV) relay missions that require stable attitude, altitude, and speed for antenna pointing and air-to-ground link consistency. The present work focuses on flight-platform stability as an enabling layer for UAV relay operation rather than on direct optimization of link-level communication metrics. During sweep transitions, however, sweep-dependent mass properties, aerodynamic loads, and control effectiveness introduce coupled attitude disturbances. This study develops a six-degree-of-freedom nonlinear multi-body model using Kane’s formalism to retain products of inertia, center-of-gravity variation, and sweep-dependent control effectiveness in a compact control-oriented form. A minimum-control-energy allocation method is formulated to coordinate the aileron and differential all-moving horizontal tail when aileron roll authority decreases at large sweep angles. An inner/outer-loop sliding-mode controller with auto-throttle is then designed for attitude, altitude, and speed regulation. Closed-loop simulations of 0–30° and 30–60° sweep maneuvers show that altitude and speed remain close to their commands while attitude deviations remain bounded. A 15% aerodynamic-coefficient perturbation case further indicates bounded closed-loop responses under the considered model uncertainty. Full article
(This article belongs to the Special Issue Millimeter-Wave and Terahertz Technologies for Wireless Communications, 2nd Edition)
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21 pages, 2166 KB  
Article
Geo-Temporal EM-AMP for CSI Acquisition in FAS-Assisted Grant-Free Random Access with a Mobile Receiver
by Yiran Shi, Sen Chen, Beiping Zhou and Xiao Chen
Electronics 2026, 15(13), 2952; https://doi.org/10.3390/electronics15132952 - 6 Jul 2026
Viewed by 240
Abstract
Receiver mobility complicates channel state information (CSI) acquisition in fluid antenna system (FAS)-assisted grant-free random access (GFRA), because user activity and multi-port channels evolve across pilot frames. Existing FAS acquisition methods are mainly frame-wise, while temporal recovery schemes do not directly combine receiver [...] Read more.
Receiver mobility complicates channel state information (CSI) acquisition in fluid antenna system (FAS)-assisted grant-free random access (GFRA), because user activity and multi-port channels evolve across pilot frames. Existing FAS acquisition methods are mainly frame-wise, while temporal recovery schemes do not directly combine receiver geometry with Doppler information. This article proposes geo-temporal expectation-maximization approximate message passing (GT-EM-AMP), which transfers posterior information between frames and refines the channel prior using receiver trajectory, effective Doppler, and coarse geometry. The proposed recursion preserves the low-complexity structure of EM-AMP while introducing only limited additional state updates. Simulations over an SNR range from −14 to 8 dB show that GT-EM-AMP achieves lower channel-estimation error and a favorable activity-detection tradeoff relative to static, temporal-only, geometry-only, and greedy baselines. Ablation, robustness, mobility, scalability, and statistical evaluations characterize the operating range of GT-EM-AMP and show that its activity-detection advantage depends on the SNR regime. GT-EM-AMP introduces modest runtime and memory overhead relative to static EM-AMP. The evaluation focuses on short acquisition windows with coarse geometry information under a Jakes-type temporal model. Full article
(This article belongs to the Special Issue Millimeter-Wave and Terahertz Technologies for Wireless Communications, 2nd Edition)
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15 pages, 17519 KB  
Article
Electromagnetic Twin Space: When Digital Twins Meet the Electromagnetic Space
by Pan Zhen, Bowen Zhu, Ning Wang, Chuan Gu, Meng Wang and Daoxing Guo
Electronics 2025, 14(22), 4546; https://doi.org/10.3390/electronics14224546 - 20 Nov 2025
Viewed by 1366
Abstract
With the escalating demand for electromagnetic spectrum resources in the 5G/6G era, efficient management of the electromagnetic space has become a critical challenge. This paper proposes the concept of an Electromagnetic Digital Twin (EDT) and an innovative framework for constructing Electromagnetic Twin Space [...] Read more.
With the escalating demand for electromagnetic spectrum resources in the 5G/6G era, efficient management of the electromagnetic space has become a critical challenge. This paper proposes the concept of an Electromagnetic Digital Twin (EDT) and an innovative framework for constructing Electromagnetic Twin Space (ETS) to achieve high-fidelity dynamic mapping and real-time optimization of the electromagnetic space through digital twin technology. We elaborate on the EDT concept, introducing a three-layer architecture comprising Physical Device Twin (PDT), Propagation Environment Twin (PET), and Electromagnetic Situation Twin (EST), thereby systematically integrating digital twin technology into the electromagnetic domain. Furthermore, we designed the ETS construction framework, clarifying the four key links between ETS construction and operation and their associated technologies. Through a case study, we demonstrate the effectiveness of a GAN-based EST, which achieves significantly better prediction accuracy than traditional methods. The findings show that incorporating building information and transmitter parameters substantially enhances the accuracy of EST, as evidenced by the RMSE metrics of the constructed electromagnetic situation. Moreover, the trained GAN model can generate electromagnetic situations under various building scenarios and transmitter locations, providing a valuable experimental platform for transmitter deployment. Full article
(This article belongs to the Special Issue Millimeter-Wave and Terahertz Technologies for Wireless Communications, 2nd Edition)
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