Beyond 100 Gb/s Optoelectronic Terahertz Communications: Key Technologies and Directions

Zhang, Lu; Pang, Xiaodan; Jia, Shi; Wang, Shiwei; Yu, Xianbin

doi:10.1109/mcom.001.2000254

Cited by 64 publications

(23 citation statements)

References 14 publications

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“…L. Zhang et al [50] Beyond 100 Gb/s Optoelectronic Terahertz Communications: Key Technologies and Directions…”

Section: Magazinementioning

confidence: 99%

Prospective Beamforming Technologies for Ultra-Massive MIMO in Terahertz Communications: A Tutorial

Ning¹,

Tian²,

Chen³

et al. 2021

Preprint

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Terahertz (THz) communications with a frequency band 0.1 − 10 THz are envisioned as a promising solution to the future high-speed wireless communication. Although with tens of gigahertz available bandwidth, THz signals suffer from severe freespreading loss and molecular-absorption loss, which limit the wireless transmission distance. To compensate the propagation loss, the ultra-massive multiple-input-multiple-output (UM-MIMO) can be applied to generate a high-gain directional beam by beamforming technologies. In this paper, a tutorial on the beamforming technologies for THz UM-MIMO systems is provided. Specifically, we first present the system model of THz UM-MIMO and identify its channel parameters and architecture types. Then, we illustrate the basic principles of beamforming via UM-MIMO and introduce the schemes of beam training and beamspace MIMO for THz communications. Moreover, the spatial-wideband effect and frequency-wideband effect in the THz beamforming are discussed. The joint beamforming technologies in the intelligent-reflectingsurface (IRS)-assisted THz UM-MIMO systems are introduced. Further, we present the corresponding fabrication techniques and illuminate the emerging applications benefiting from THz beamforming. Open challenges and future research directions on THz UM-MIMO systems are finally highlighted.

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“…L. Zhang et al [50] Beyond 100 Gb/s Optoelectronic Terahertz Communications: Key Technologies and Directions…”

Section: Magazinementioning

confidence: 99%

Prospective Beamforming Technologies for Ultra-Massive MIMO in Terahertz Communications: A Tutorial

Ning¹,

Tian²,

Chen³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Different research directions are highlighted in these works, including five main aspects, namely, hardware for THz communications [1], [2], [4], [5], [21], [23]- [25], [28], [29], [33], THz channels [1], [2], [4], [5], [20], [21], [23], [26], [29]- [31], THz communication techniques [1], [2], [4], [5], [27], [30]- [32], THz networking [1], [2], [31], [32], and THz experimental and simulation testbeds [1], [2].…”

Section: Related Workmentioning

confidence: 99%

TeraHertz Band Communication: An Old Problem Revisited and Research Directions for the Next Decade

Akyildiz¹,

Han²,

Hu³

et al. 2021

Preprint

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TeraHertz (THz) band communications are envisioned as a key technology for 6G and Beyond. As a fundamental wireless infrastructure, THz communication can boost abundant promising applications. In 2014, our team published two comprehensive roadmaps for the development and progress of THz communication networks [1], [2], which helped the research community to start research on this subject afterwards. In particular, this topic became very important and appealing to the research community due to 6G wireless systems design and development in recent years. Many papers are getting published covering different aspects of wireless systems using the THz band. With this paper, our aim is looking back to the last decade and revisiting the old problems and pointing out what has been achieved in the research community so far. Furthermore, in this paper still to be investigated new research challenges for the THz band communication systems are presented by covering diverse subtopics such as from perspectives of devices, channel behavior, communication and networking problems, physical testbeds and demonstration systems. The key aspects presented in this paper will enable THz communications as a pillar of 6G and Beyond wireless systems in the next decade.

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“…This system construction method allows for multichannel, high-precision and high-complexity centralized modulation at the information center, and the modulated signal can be transmitted and processed through simple photoelectric conversion and THz wave emission. Due to its excellent baseband processing capability and high-efficiency frequency conversion devices, microwave photonic systems can achieve a high data rate [13,14].…”

Section: Microwave Photonics Thz Communication Systemsmentioning

confidence: 99%

Terahertz direct modulation techniques for high-speed communication systems

Zhou

Zhang

et al. 2021

China Commun.

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Terahertz communication technology can provide abundant frequency resources, strong confidentiality, antijamming capability, communication tracking capability and the ability to achieve highspeed data transmissions and can serve as an important technical method for high-speed communications in the future. Among these terahertz communication technologies, terahertz direct modulation technology is a key means to achieve low system complexity and power consumption. In this paper, a review and outlook of terahertz direct modulation technology are proposed from the aspects of high-electron-mobilitytransistor-based terahertz direct modulation, parallelswitch terahertz direct modulation, diode-based terahertz direct modulation, quantum cascade laser-based terahertz direct modulation and new-material-based terahertz direct modulation. We hope through this paper that more readers can gain knowledge about the development and challenges of terahertz direct modulation technology for high-speed communication systems, thus promoting the development of high-speed terahertz communication technology based on direct modulation.

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Beyond 100 Gb/s Optoelectronic Terahertz Communications: Key Technologies and Directions

Cited by 64 publications

References 14 publications

Prospective Beamforming Technologies for Ultra-Massive MIMO in Terahertz Communications: A Tutorial

Prospective Beamforming Technologies for Ultra-Massive MIMO in Terahertz Communications: A Tutorial

TeraHertz Band Communication: An Old Problem Revisited and Research Directions for the Next Decade

Terahertz direct modulation techniques for high-speed communication systems

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