Emerging Technologies and Advances in Wireless and 6G Communication
A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".
Deadline for manuscript submissions: 20 June 2024 | Viewed by 954
2. Department of Sciences and Technologies, Universidade Autónoma de Lisboa, 1169-023 Lisboa, Portugal
Interests: cellular communications; 5G and beyond; massive-MIMO; millimeter-wave communications; block transmission techniques; NOMA
Special Issues, Collections and Topics in MDPI journals
The future digital society, in the scope of increasing automation, namely the digital society of 2030 and beyond, comprises more and more connected devices (IoT), including sensors, vehicles, aerial drones, data, etc. While 5G supports autonomous vehicles, the increasing number of sensors per vehicle requires higher-speed communications and lower latencies. Society and organizations demand new services to be included in 6G, including the following:
- Augmented reality and extended reality;
- Artificial-intelligence-infused applications;
- Wireless brain-computer interactions;
- Holographic services;
- The integration of communications with localization, mapping, and remote control;
- Emerging eHealth applications;
- Improved autonomous vehicles;
- More efficient support of IoT, namely smart cities and smart houses, supporting an extremely high number of low-power devices;
- Support of flying vehicles and increased mobility speed.
In addition, 6G aims to have higher energy efficiency and more efficient strategies of energy-harvesting so that the autonomy of user equipment can be increased despite its demanding applications.
These new services and capabilities to be supported by 6G continue to require more efficient networks, such as increased data rate, lower latency, more efficient spectral efficiency, increased energy efficiency, and improved network capacity. Some of the foreseen requirements for 6G include the following:
- Nomadic peak data rate of at least 1 Tbps (100 times higher than 5G);
- Mobile data rate of 1 Gbps (10 times higher than 5G);
- Energy efficiency 10 to 100 times better than 5G;
- Spectral efficiency 5 to 10 times better than 5G.
While 5G requirements are achieved based on mm-Wave and m-MIMO, 6G must incorporate new concepts such as passive antennas, namely reconfigurable intelligent surfaces (RIS). In order to achieve potential gains (coverage, interference cancellation, secrecy, spectral efficiency, etc.), there is a need to estimate the channel characteristics, and this is difficult to achieve with passive elements. Recently, active antennas, such as large intelligent antenna systems (LIS), also referred to as ultra massive MIMO (UL-MIMO) or extremely large antenna arrays (ELAA), have been employed to achieve such gain desiderates; however, the complexity also increases with the employment of these processes. In terms of frequency bands, 6G is revolutionary, as it includes visible light communications (VLC) and terahertz bands (100 GHz–10 THz), enabling data rates in the order of hundreds of Gbps. VLC is a mature communication technique well suited for short-range coverage, though susceptible to interferences, such as from the sun.
This Special Issue aims to provide an overview of 6G communications and beyond, in terms of network, services, and requirements, while describing advances in networks, services and transmission techniques foreseen for future versions. All new ideas about how to improve performance, capacity, and/or spectrum efficiency of transmission techniques for 6G and beyond, while keeping computational cost at an acceptable level, are most welcome. Contributions to this Special Issue should provide an overview of how the proposed schemes bring added value to the advances in cellular communications in terms of performance, services and/or advanced requirements.
Dr. Mário Marques da Silva
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- 6G and beyond
- advances in cellular communications
- LIS antenna systems
- RIS antenna systems
- terahertz bands