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An Overview of Signal Processing Techniques for Terahertz Communications
TLDR
This tutorial overviews classical problems of waveform design and modulation, beamforming and precoding, index modulation, channel estimation, channel coding, and data detection in THz transceiver systems and reconfigurable intelligent surfaces, which are vital to overcoming the distance problem at very high frequencies.Abstract:
Terahertz (THz)-band communications are a key enabler for future-generation wireless communication systems that promise to integrate a wide range of data-demanding applications. Recent advancements in photonic, electronic, and plasmonic technologies are closing the gap in THz transceiver design. Consequently, prospect THz signal generation, modulation, and radiation methods are converging, and the corresponding channel model, noise, and hardware-impairment notions are emerging. Such progress paves the way for well-grounded research into THz-specific signal processing techniques for wireless communications. This tutorial overviews these techniques with an emphasis on ultra-massive multiple-input multiple-output (UM-MIMO) systems and reconfigurable intelligent surfaces, which are vital to overcoming the distance problem at very high frequencies. We focus on the classical problems of waveform design and modulation, beamforming and precoding, index modulation, channel estimation, channel coding, and data detection. We also motivate signal processing techniques for THz sensing and localization.read more
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Convergent Communication, Sensing and Localization in 6G Systems: An Overview of Technologies, Opportunities and Challenges
Carlos H. M. de Lima,Didier Belot,Rafael Berkvens,Andre Bourdoux,Davide Dardari,Maxime Guillaud,Minna Isomursu,Elena Simona Lohan,Yang Miao,Andre Noll Barreto,Muhammad Reza Kahar Aziz,Jani Saloranta,Tachporn Sanguanpuak,Hadi Sarieddeen,Gonzalo Seco-Granados,Jaakko Suutala,Tommy Svensson,Mikko Valkama,Barend van Liempd,Henk Wymeersch +19 more
TL;DR: In this article, the authors focus on convergent 6G communication, localization and sensing systems by identifying key technology enablers, discussing their underlying challenges, implementation issues, and recommending potential solutions.
Journal ArticleDOI
Multi-Hop RIS-Empowered Terahertz Communications: A DRL-Based Hybrid Beamforming Design
Chongwen Huang,Zhaohui Yang,George C. Alexandropoulos,Kai Xiong,Li Wei,Chau Yuen,Zhaoyang Zhang,Merouane Debbah +7 more
TL;DR: In this paper, the authors proposed a hybrid beamforming scheme for the multi-hop RIS-assisted communication networks to improve the coverage range at the TeraHertz-band frequencies.
Posted Content
6G white paper on localization and sensing
Andre Bourdoux,Andre Noll Barreto,Barend van Liempd,Carlos H. M. de Lima,Davide Dardari,Didier Belot,Elena Simona Lohan,Gonzalo Seco-Granados,Hadi Sarieddeen,Henk Wymeersch,Jaakko Suutala,Jani Saloranta,Maxime Guillaud,Minna Isomursu,Mikko Valkama,Muhammad Reza Kahar Aziz,Rafael Berkvens,Tachporn Sanguanpuak,Tommy Svensson,Yang Miao +19 more
TL;DR: This white paper explores future localization and sensing opportunities for beyond 5G wireless communication systems by identifying key technology enablers and discussing their underlying challenges, implementation issues, and identifying potential solutions, as well as highlighting foundational research challenges.
Journal ArticleDOI
Optimizing Computation Offloading in Satellite-UAV-Served 6G IoT: A Deep Learning Approach
TL;DR: In this paper, a deep learning-based offloading policy optimization strategy is given where the long short-term memory model is considered to address the dynamics of energy harvesting performance, and the theoretical explanation and performance analysis is discovered the importance of emerging technologies including SAGIN, energy harvesting, and artificial intelligence techniques for 6G IoT.
Posted Content
Seven Defining Features of Terahertz (THz) Wireless Systems: A Fellowship of Communication and Sensing.
Christina Chaccour,Mehdi Naderi Soorki,Walid Saad,Mehdi Bennis,Petar Popovski,Merouane Debbah +5 more
TL;DR: In this article, the authors characterize seven unique defining features of the terahertz (THz) wireless systems: 1) Quasi-opticality of the band, 2) THz-tailored wireless architectures, 3) Synergy with lower frequency bands, 4) Joint sensing and communication systems, 5) PHY-layer procedures, 6) Spectrum access techniques, and 7) Real-time network optimization.
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