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author:

Hoseini, Sayed Amir (Hoseini, Sayed Amir.) [1] | Ding, Ming (Ding, Ming.) [2] | Hassan, Mahbub (Hassan, Mahbub.) [3] | Chen, Youjia (Chen, Youjia.) [4] (Scholars:陈由甲)

Indexed by:

SCIE

Abstract:

In this paper, we show how the absorption and re-radiation energy from molecules in the air can influence the Multiple Input Multiple Output (MIMO) performance in high-frequency bands, e.g., millimeter wave (mmWave) and terahertz. In more detail, some common atmosphere molecules, such as oxygen and water, can absorb and re-radiate energy in their natural resonance frequencies, such as 60 GHz, 180 GHz and 320 GHz. Hence, when hit by electromagnetic waves, molecules will get excited and absorb energy, which leads to an extra path loss and is known as molecular attenuation. Meanwhile, the absorbed energy will be re-radiated towards a random direction with a random phase. These re-radiated waves also interfere with the signal transmission. Although, the molecular re-radiation was mostly considered as noise in literature, recent works show that it is correlated to the main signal and can be viewed as a composition of multiple delayed or scattered signals. Such a phenomenon can provide non-line-of-sight (NLoS) paths in an environment that lacks scatterers, which increases spatial multiplexing and thus greatly enhances the performance of MIMO systems. Therefore in this paper, we explore the scattering model and noise models of molecular re-radiation to characterize the channel transfer function of the NLoS channels created by atmosphere molecules. Our simulation results show that the re-radiation can increase MIMO capacity up to 3 folds in mmWave and 6 folds in terahertz for a set of realistic transmit power, distance, and antenna numbers. We also show that in the high SNR, the re-radiation makes the open-loop precoding viable, which is an alternative to beamforming to avoid beam alignment sensitivity in high mobility applications.

Keyword:

Absorption Atmospheric modeling Attenuation Electromagnetic scattering millimeter wave communication MIMO MIMO communication molecular absorption noise Resonant frequency Rician channels spatial diversity terahertz radiation THz Wireless communication Wireless networks

Community:

  • [ 1 ] [Hoseini, Sayed Amir]Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia
  • [ 2 ] [Ding, Ming]CSIRO, Data61, Eveleigh, NSW 2015, Australia
  • [ 3 ] [Hassan, Mahbub]Univ New South Wales, Sch Comp Sci & Engn, Sydney, NSW 2052, Australia
  • [ 4 ] [Chen, Youjia]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • [Hoseini, Sayed Amir]Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia

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Source :

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

ISSN: 0018-9545

Year: 2020

Issue: 12

Volume: 69

Page: 15458-15471

5 . 9 7 8

JCR@2020

6 . 1 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:132

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 6

SCOPUS Cited Count: 8

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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