Universiti Teknologi Malaysia Institutional Repository

Investigation of future 5G-IoT millimeter-wave network performance at 38 GHz for urban microcell outdoor environment

Qamar, Faizan and Hindia, M. H. D. Nour and Dimyati, Kaharudin and Noordin, Kamarul Ariffin and Majed, Mohammed Bahjat and Abd. Rahman, Tharek and Amiri, Iraj Sadegh (2019) Investigation of future 5G-IoT millimeter-wave network performance at 38 GHz for urban microcell outdoor environment. Electronics (Switzerland), 8 (5). p. 495. ISSN 20799292


Official URL: http://dx.doi.org/10.3390/electronics8050495


The advent of fifth-generation (5G) systems and their mechanics have introduced an unconventional frequency spectrum of high bandwidth with most falling under the millimeter wave (mmWave) spectrum. The benefit of adopting these bands of the frequency spectrum is two-fold. First, most of these bands appear to be unutilized and they are free, thus suggesting the absence of interference from other technologies. Second, the availability of a larger bandwidth offers higher data rates for all users, as there are higher numbers of users who are connected in a small geographical area, which is also stated as the Internet of Things (IoT). Nevertheless, high-frequency band poses several challenges in terms of coverage area limitations, signal attenuation, path and penetration losses, as well as scattering. Additionally, mmWave signal bands are susceptible to blockage from buildings and other structures, particularly in higher-density urban areas. Identifying the channel performance at a given frequency is indeed necessary to optimize communication effciency between the transmitter and receiver. Therefore, this paper investigated the potential ability of mmWave path loss models, such as floating intercept (FI) and close-in (CI), based on real measurements gathered from urban microcell outdoor environments at 38 GHz conducted at the Universiti Teknologi Malaysia (UTM), Kuala Lumpur campus. The measurement data were obtained by using a narrow band mmWave channel sounder equipped with a steerable direction horn antenna. It investigated the potential of the network for outdoor scenarios of line-of-sight (LOS) and non-line-of-sight (NLOS) with both schemes of co- (vertical-vertical) and cross (vertical-horizontal) polarization. The parameters were selected to reflect the performance and the variances with other schemes, such as average users cell throughput, throughput of users that are at cell-edges, fairness index, and spectral effciency. The outcomes were examined for various antenna configurations as well as at different channel bandwidths to prove the enhancement of overall network performance. This work showed that the CI path loss model predicted greater network performance for the LOS condition, and also estimated significant outcomes for the NLOS environment. The outputs proved that the FI path loss model, particularly for V-V antenna polarization, gave system simulation results that were unsuitable for the NLOS scenario.

Item Type:Article
Uncontrolled Keywords:5G, Millimeter wave
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:89056
Deposited By: Widya Wahid
Deposited On:26 Jan 2021 16:41
Last Modified:26 Jan 2021 16:41

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