Improving millimeter-wave channel models for suburban environments with site-specific geometric features

Zhang, Yaguang; Love, David J.; Michelusi, Nicolò; Krogmeier, James V.; Jyoti, Soumya; Sprintson, Alex; Anderson, Christopher R.

doi:10.23919/ropaces.2018.8364140

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…In [7], a constant excess path loss of around 25 dB was observed at 28.8 GHz through a pecan orchard for paths with roughly 8 to 20 trees. More recent works [5], [8] reported low attenuation values per unit foliage depth of 0.07 dB/m at 28 GHz and of 0.4 dB/m with 3 dB deviation at 73 GHz, respectively. In [9], attenuation with a dualslope structure was observed for out-of-leaf measurements at 15 GHz, 28 GHz and 38 GHz in forest environments.…”

Section: Introductionmentioning

confidence: 95%

“…A major issue is to better understand the propagation characteristics of mm-wave signals. Many mm-wave channel measurement campaigns have recently been carried out in urban and suburban environments [2]- [5]. However, very limited effort has been put into validating and improving current channel models in overcoming vegetation blockage.…”

Section: Introductionmentioning

confidence: 99%

“…In [9], attenuation with a dualslope structure was observed for out-of-leaf measurements at 15 GHz, 28 GHz and 38 GHz in forest environments. Moreover, even though a variety of modeling approaches have been considered, most of them ignore site-specific geographic features [5]. A comprehensive analysis for attenuation in vegetation is required to validate those observations and make improvements to mm-wave propagation modeling.…”

Section: Introductionmentioning

confidence: 99%

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Propagation Modeling Through Foliage in a Coniferous Forest at 28 GHz

Zhang

Anderson

Michelusi

et al. 2019

IEEE Wireless Commun. Lett.

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The goal of this article is to investigate the propagation behavior of 28-GHz millimeter wave in coniferous forests and model its basic transmission loss. Field measurements were conducted with a custom-designed sliding correlator sounder. Relevant foliage regions were extracted from high-resolution LiDAR data and satellite images. Our results show that traditional foliage analysis models for lower-frequency wireless communications fail to consistently output correct path loss predictions. Novel fully automated site-specific models are proposed to resolve this issue, yielding 0.9 dB overall improvement and up to 20 dB regional improvement in root mean square errors.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Propagation Modeling Through Foliage in a Coniferous Forest at 28 GHz

Zhang

Anderson

Michelusi

et al. 2019

IEEE Wireless Commun. Lett.

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“…However, while outdoor-to-outdoor (OtO) and indoor-to-indoor (ItI) propagation scenarios have been extensively measured [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], existing OtI datasets are relatively small in size [10][11][12][26][27][28]. In this paper we present the results of an extensive OtI mmWave measurement campaign that we conducted in a dense urban environment.…”

Section: Introductionmentioning

confidence: 99%

Outdoor-to-Indoor 28 GHz Wireless Measurements in Manhattan: Path Loss, Environmental Effects, and 90% Coverage

Kohli¹,

Adhikari²,

Avci³

et al. 2022

Preprint

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Outdoor-to-indoor (OtI) signal propagation further challenges the already tight link budgets at millimeter-wave (mmWave). To gain insight into OtI mmWave scenarios at 28 GHz, we conducted an extensive measurement campaign consisting of over 2,200 link measurements. In total, 43 OtI scenarios were measured in West Harlem, New York City, covering seven highly diverse buildings. The measured OtI path gain can vary by up to 40 dB for a given link distance, and the empirical path gain model for all data shows an average of 30 dB excess loss over free space at distances beyond 50 m, with an RMS fitting error of 11.7 dB. The type of glass is found to be the single dominant feature for OtI loss, with 20 dB observed difference between empirical path gain models for scenarios with low-loss and high-loss glass. The presence of scaffolding, tree foliage, or elevated subway tracks, as well as difference in floor height are each found to have an impact between 5-10 dB. We show that for urban buildings with high-loss glass, OtI coverage can support 500 Mbps for 90% of indoor user equipment (UEs) with a base station (BS) antenna placed up to 49 m away. For buildings with low-loss glass, such as our case study covering multiple classrooms of a public school, data rates over 2.5/1.2 Gbps are possible from a BS 68/175 m away from the school building, when a line-of-sight path is available. We expect these results to be useful for the deployment of mmWave networks in dense urban environments as well as the development of relevant scheduling and beam management algorithms.

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“…To minimize additional deployment costs, cellular operators are exploring methods to deploy smaller, denser cells for higher capacity, such as LTE picocells on lampposts or Wi-Fi hotspots that complement existing LTE macrocells. [7][8][9] The development of the millimeter-wave range is a promising direction for the developed high-speed mobile broadband radio access systems. The use of narrow beams in the millimeterwave bands can significantly reduce the interference that is inherent in these frequencies.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Millimeter-Wave Radio Link Characteristics of Ieee 802.11AD Standard in Urban Areas

Kravchuk

Afanasieva

Kravchuk

2021

ITS

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Background. The explosive growth in the use of mobile broadband is significantly increasing the bandwidth requirements. Millimeter-wave spectrum is necessary for 5G networks to achieve data transfer rates of the order of Gb/s, in particular, for the provision of 3D video services, and the use radio modules for millimeter-wave frequencies as picocells in the streets will expand the capabilities of existing cellular networks and provide an increase in bandwidth. Therefore, the study of the characteristics of this spectrum is an urgent task today. Objective. The purpose of the paper is to present the results of studying the characteristics of a millimeter-wave radio link to ensure high-speed user access to IP data transmission networks and the possibility of using the IEEE 802.11ad standard in open areas. Methods. Structural and functional methods of constructing a millimeter-wave wireless network in urban areas based on IEEE 802.11ad standard hardware are investigated. Results. The studies were carried out using a test bench with a point-to-point topology deployed in an urban environment (Kiev) with the line of sight without significant obstacles. The studies tested the possibility of using for millimeter-wave hardware technologies of the IEEE 802.11ad standard, which is used indoors, for applications in urban areas. The use of a narrow beam antenna based on an antenna array allows adaptive control of the radiation pattern to bypass small obstacles blocking direct transmission, which allows reducing interference and receive/transmit a signal. Conclusions. Experimental testing of the hardware capabilities of the IEEE 802.11ad standard has been carried out. Scenarios for constructing a millimeter-wave radio link under various weather conditions have been worked out. Keywords: millimeter-wave; bandwidth; IEEE 802.11ad standard; 5G networks

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Improving millimeter-wave channel models for suburban environments with site-specific geometric features

Cited by 8 publications

References 5 publications

Propagation Modeling Through Foliage in a Coniferous Forest at 28 GHz

Propagation Modeling Through Foliage in a Coniferous Forest at 28 GHz

Outdoor-to-Indoor 28 GHz Wireless Measurements in Manhattan: Path Loss, Environmental Effects, and 90% Coverage

Investigation of a Millimeter-Wave Radio Link Characteristics of Ieee 802.11AD Standard in Urban Areas

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