Intelligent Reflecting Surface Assisted Terahertz Communications Toward 6G

Chen, Zhi; Ning, Boyu; Han, Chong; Tian, Zhongbao; Li, Shaoqian

doi:10.1109/mwc.001.2100215

Cited by 71 publications

(32 citation statements)

References 14 publications

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“…The core of our unified procedure is the proposed framework and training/tracking protocol, based on which the beam codebook can be reconsidered catering for various requirements, e.g., beam coverage [37] and wideband effects [38]. It is also interesting to consider the 3D training and tracking procedure for THz IRS-assisted systems in the future [39], [40].…”

Section: Discussionmentioning

confidence: 99%

A Unified 3D Beam Training and Tracking Procedure for Terahertz Communication

Ning,

Chen,

Tian

et al. 2021

Preprint

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Terahertz (THz) communication is considered as an attractive way to overcome the bandwidth bottleneck and satisfy the ever-increasing capacity demand in the future. Due to the high directivity and propagation loss of THz waves, a massive MIMO system using beamforming is envisioned as a promising technology in THz communication to realize highgain and directional transmission. However, pilots, which are the fundamentals for many beamforming schemes, are challenging to be accurately detected in the THz band owing to the severe propagation loss. In this paper, a unified 3D beam training and tracking procedure is proposed to effectively realize the beamforming in THz communications, by considering the line-ofsight (LoS) propagation. In particular, a novel quadruple-uniform planar array (QUPA) architecture is analyzed to enlarge the signal coverage, increase the beam gain, and reduce the beam squint loss. Then, a new 3D grid-based (GB) beam training is developed with low complexity, including the design of the 3D codebook and training protocol. Finally, a simple yet effective grid-based hybrid (GBH) beam tracking is investigated to support THz beamforming in an efficient manner. The communication framework based on this procedure can dynamically trigger beam training/tracking depending on the real-time quality of service. Numerical results are presented to demonstrate the superiority of our proposed beam training and tracking over the benchmark methods.

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Section: Discussionmentioning

confidence: 99%

A Unified 3D Beam Training and Tracking Procedure for Terahertz Communication

Ning,

Chen,

Tian

et al. 2021

Preprint

Self Cite

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“…In this figure, the channel between MT and IRS, IRS and MR, and MT and MR, are modeled as

H_{1}

H_{2}

, and

H_{3}

, respectively. The model presented in Figure 1A is a generalized model where by setting different parameter's values we can have different models presented in Reference 27–32 For example, if we consider

P = Q = 1

and

v_{MT} = v_{MR} = 0

the model will be the same as considered in Reference 27,32.…”

Section: Proposed Framework For Irs‐assisted Thz Communication Systemsmentioning

confidence: 99%

“…Conducted numerical analysis emphasizes the potential of IRSs for THz communication systems. Authors in Reference 28 studied EE, and cost‐effectiveness of IRS‐assisted THz communication for the 6G wireless network systems. They emphasized the influence of currently available IRS‐assisted beam training strategies and the THz beam‐steering devices for the 6G communication systems.…”

Section: Introductionmentioning

confidence: 99%

Intelligent reflecting surface‐assisted terahertz communication towards B5G and 6G: State‐of‐the‐art

Raza

Ijaz

Ishfaq

et al. 2022

Micro & Optical Tech Letters

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After the deployment of 5th generation (5G), the beyond 5G (B5G) and 6th generation (6G) communication grabs the critical attention of academia and researchers. In ongoing cellular generation, the selected radio spectrum (i.e., millimeter waves [mm-Wave]) is unable to achieve the required data rates. Future cellular generations need more data rate and link reliability to serve emerging intelligent applications of B5G and 6G (e.g., autonomous driving, virtual reality, etc.). To handle these limitations of ongoing cellular generation, the researchers are working on key factors to have a smart, high capacity and ultra-reliable propagation environment. To increase the data rate of the B5G and 6G network systems, the terahertz (THz) band is selected. However, to increase link reliability, the intelligent reflecting surfaces (IRSs) have a crucial impact on wireless network environments. Immense work has been done on the performance analysis of IRS-assisted wireless communication networks. This treatise imposes a comparison of such IRS-assisted THz communication systems, and future promising applications.

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“…As mentioned in Sec. III-C, RIS-embedded THz systems have the potential to alleviate the LoS blockage issue as well as to enlarge the coverage, by intelligently controlling the incident wave reflection [222]. Multiple research problems still remain, including the joint design of active and passive beamforming algorithm in the THz band.…”

Section: G Open Problemsmentioning

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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Intelligent Reflecting Surface Assisted Terahertz Communications Toward 6G

Cited by 71 publications

References 14 publications

A Unified 3D Beam Training and Tracking Procedure for Terahertz Communication

A Unified 3D Beam Training and Tracking Procedure for Terahertz Communication

Intelligent reflecting surface‐assisted terahertz communication towards B5G and 6G: State‐of‐the‐art

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

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