Beyond 5G: THz-Based Medium Access Protocol for Mobile Heterogeneous Networks

Cacciapuoti, Angela Sara; Sankhe, Kunal; Caleffi, Marcello; Chowdhury, Kaushik R.

doi:10.1109/mcom.2018.1700924

Cited by 85 publications

(57 citation statements)

References 11 publications

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“…As a result, a great amount of effort was put in modeling the THz channel particularities [10], evaluating their impact on the system's performance [11], [12] and proposing countermeasures [13]- [18]. On the other hand, antenna misalignment is caused due to the use of high directive antennas, which cannot be easily fully-aligned [19]. Finally, the hardware imperfections are the result of components mismatch and manufacturing defects in the radio frequency (RF) transceiver chain [20].…”

Section: Introductionmentioning

confidence: 99%

Analytical Performance Assessment of THz Wireless Systems

2019

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This paper is focused on providing the analytical framework for the quantification and evaluation of the joint effect of misalignment fading and hardware imperfections in the presence of multipath fading at terahertz (THz) wireless fiber extenders. In this context, we present the appropriate system model that incorporates the different operation, design, and environmental parameters. In more detail, it takes into account the transceivers antenna gains, the operation frequency, the distance between the transmitter (TX) and the receiver (RX), the environmental conditions, i.e., temperature, humidity, and pressure, the spatial jitter between the TX and RX antennas that results to antennas misalignment, the level of transceivers' hardware imperfections, and the stochastic characteristics of the wireless channel. Based on this model, we analyze and quantify the joint impact of misalignment and multipath fading by providing novel closedform expressions for the probability and cumulative density functions of the composite channel. Moreover, we derive exact closed-form expressions for the outage probability for both cases of ideal and non-ideal radio frequency (RF) front-end. In addition, in order to quantify the detrimental effect of misalignment fading, we analytically obtain the outage probability in the absence of misalignment cases for both cases of ideal and non-ideal RF front-end. In addition, we extract the novel closed-form expressions for the ergodic capacity for the case of the ideal RF front-end and tight upper bounds for both the cases of ideal and non-ideal RF front-end. Finally, an insightful ergodic capacity ceiling for the non-ideal RF front-end case is provided. INDEX TERMS Beyond 5G systems, ergodic capacity, fiber extender, hardware impairments, high frequency communications, misalignment fading, outage probability, performance analysis, terahertz communications, theoretical framework, α-µ fading.

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Section: Introductionmentioning

confidence: 99%

Analytical Performance Assessment of THz Wireless Systems

2019

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“…Having addressed several THz-specific signal processing techniques, it is worth noting that it is both the signal processing and networking problems that are significantly different in the THz band; both are linked to the underlying THz device architectures. Hence, THz-specific medium access (MAC) protocols [334]- [340] need to be optimized jointly with physical layer signal processing schemes, under the constraints of state of the art THz devices. In particular, multiple access and networking paradigms for highly varying THz mobile environments are required.…”

Section: B Networking and Securitymentioning

confidence: 99%

An Overview of Signal Processing Techniques for Terahertz Communications

Sarieddeen¹,

Alouini²,

Al-Naffouri³

2020

Preprint

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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.

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“…As an outcome, 6G should promote wireless technologies we know nowadays and attain system prosecution. As an idea aimed at the upcoming, in terms of speed, 6G is likely to use an advanced frequency spectrum than preceding generations to advance the data throughput estimated at 100 to 1000 times quicker than 5G [3]. To be precise, 6G systems will let hundreds of GBs per second to connect to the second using broadband spectrum; for instance, the combined usage of a band from 1 to 3 GHz, a millimeter wave band (mm wave) (30 to 300 GHz) and a terahertz band (0.06 to 10 THz).…”

Section: Introductionmentioning

confidence: 99%

A Review of Vision and Challenges of 6G Technology

Nawaz¹,

Ibrahim²,

Awais³

et al. 2020

IJACSA

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With the accelerated evolution of smart terminals and rising fresh applications, wireless information traffic has sharply enhanced and underway cellular networks (even 5G) can't entirely compete the rapidly emerging technical necessities. A fresh framework of wireless communication, the sixth era (6G) framework, by floating aid of artificial intelligence is anticipated to be equipped somewhere in the range of 2027 and 2030. This paper presents critical analysis of Vision of 6G wireless communication and its network structure; also outline a number of important technical challenges, additionally some possible solutions related to 6G, as well as physical layer transmission procedures, network designs, security methods.

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Beyond 5G: THz-Based Medium Access Protocol for Mobile Heterogeneous Networks

Cited by 85 publications

References 11 publications

Analytical Performance Assessment of THz Wireless Systems

Analytical Performance Assessment of THz Wireless Systems

An Overview of Signal Processing Techniques for Terahertz Communications

A Review of Vision and Challenges of 6G Technology

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