Combating the Distance Problem in the Millimeter Wave and Terahertz Frequency Bands
TLDR
In this article, four directions to tackle the crucial problem of distance limitation are investigated, namely, a distance-aware physical layer design, ultra-massive MIMO communication, reflectarrays, and intelligent surfaces.Abstract:
In the millimeter-wave (30-300 GHz) and terahertz (0.1-10 THz) frequency bands, the high spreading loss and molecular absorption often limit the signal transmission distance and coverage range. In this article, four directions to tackle the crucial problem of distance limitation are investigated, namely, a distance-aware physical layer design, ultra-massive MIMO communication, reflectarrays, and intelligent surfaces. Additionally, the potential joint design of these solutions is proposed to combine the benefits and further extend the communication distance. Qualitative and quantitative evaluations are provided to illustrate the benefits of the proposed solutions. The feasibility of mmWave and THz band communications up to 100 m in both line-of-sight and nonline- of-sight areas are demonstrated.read more
Citations
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Journal ArticleDOI
Holographic MIMO Surfaces for 6G Wireless Networks: Opportunities, Challenges, and Trends
Chongwen Huang,Sha Hu,George C. Alexandropoulos,Alessio Zappone,Chau Yuen,Rui Zhang,Marco Di Renzo,Merouane Debbah +7 more
TL;DR: An overview of HMIMOS communications including the available hardware architectures for reconfiguring such surfaces are provided, and the opportunities and key challenges in designingHMIMOS-enabled wireless communications are highlighted.
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6G Wireless Communications: Vision and Potential Techniques
TL;DR: A number of key technical challenges as well as the potential solutions associated with 6G, including physical-layer transmission techniques, network designs, security approaches, and testbed developments are outlined.
Journal ArticleDOI
Wireless Communications with Reconfigurable Intelligent Surface: Path Loss Modeling and Experimental Measurement
Wankai Tang,Ming Zheng Chen,Xiangyu Chen,Jun Yan Dai,Yu Han,Marco Di Renzo,Yong Zeng,Shi Jin,Qiang Cheng,Tie Jun Cui +9 more
TL;DR: In this article, free-space path loss models for RIS-assisted wireless communications are developed for different scenarios by studying the physics and electromagnetic nature of RISs, which reveal the relationships between the free space path loss of RIS assisted wireless communications and the distance from the transmitter/receiver to the RIS, the size of the RIS and the radiation patterns of antennas and unit cells.
Journal ArticleDOI
Wireless Communications With Reconfigurable Intelligent Surface: Path Loss Modeling and Experimental Measurement
Wankai Tang,Ming Zheng Chen,Xiangyu Chen,Jun Yan Dai,Yu Han,Marco Di Renzo,Yong Zeng,Shi Jin,Qiang Cheng,Tie Jun Cui +9 more
TL;DR: The proposed models, which are first validated through extensive simulation results, reveal the relationships between the free-space path loss of RIS-assisted wireless communications and the distances from the transmitter/receiver to the RIS, the size of the ris, the near-field/far-field effects of the RIS and the radiation patterns of antennas and unit cells.
Journal ArticleDOI
6G and Beyond: The Future of Wireless Communications Systems
TL;DR: Significant technological breakthroughs to achieve connectivity goals within 6G include: a network operating at the THz band with much wider spectrum resources, intelligent communication environments that enable a wireless propagation environment with active signal transmission and reception, and pervasive artificial intelligence.
References
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Journal ArticleDOI
Full length article: Terahertz band: Next frontier for wireless communications
TL;DR: An in-depth view of Terahertz Band (0.1-10 THz) communication, which is envisioned as a key technology to satisfy the increasing demand for higher speed wireless communication, is provided.
Journal ArticleDOI
Millimeter-Wave Enhanced Local Area Systems: A High-Data-Rate Approach for Future Wireless Networks
Amitava Ghosh,Timothy A. Thomas,Mark C. Cudak,Rapeepat Ratasuk,Prakash Moorut,Frederick W. Vook,Theodore S. Rappaport,George R. MacCartney,Shu Sun,Shuai Nie +9 more
TL;DR: A case is made for using mmWave for a fifth generation (5G) wireless system for ultradense networks by presenting an overview of enhanced local area (eLA) technology at mmWave with emphasis on 5G requirements, spectrum considerations, propagation and channel modeling, air-interface and multiantenna design, and network architecture solutions.
Journal ArticleDOI
Multi-Ray Channel Modeling and Wideband Characterization for Wireless Communications in the Terahertz Band
TL;DR: A unified multi-ray channel model in the Terahertz Band is developed based on ray tracing techniques, which incorporates the propagation models for the line-of-sight, reflected, scattered, and diffracted paths to lay out the foundation for reliable and efficient ultra-high-speed wireless communications in the (0.06-10) THz Band.
Journal ArticleDOI
Graphene-based Plasmonic Nano-Antenna for Terahertz Band Communication in Nanonetworks
TL;DR: Graphene-based plasmonic nano-antennas are able to operate at much lower frequencies than their metallic counterparts, e.g., the Terahertz Band for a one-micrometer-long ten-nanometers-wide antenna, which has the potential to enable EM communication in nanonetworks.
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Towards THz Communications - Status in Research, Standardization and Regulation
Thomas Kurner,Sebastian Priebe +1 more
TL;DR: An overview over THz communications is given, summarizing current research projects, spectrum regulations and ongoing standardization activities, and the technology enabling small integrated transceivers with highly directive, steerable antennas becomes the key challenges in face of the very high path losses.