A general altitude-dependent path loss model for UAV-to-ground millimeter-wave communications

2021 ◽  
Vol 22 (6) ◽  
pp. 767-776
Author(s):  
Qiuming Zhu ◽  
Mengtian Yao ◽  
Fei Bai ◽  
Xiaomin Chen ◽  
Weizhi Zhong ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Path Loss ◽  
Loss Model ◽  
Path Loss Model ◽  
Millimeter Wave Communications

scholarly journals Path loss model for indoor emergency stairwell environment at millimeter wave band for 5G network

2018 ◽  
Vol 26 (6) ◽  
pp. 3025-3033 ◽  
Author(s):  
Ahmed Mohammed AL-SAMMAN ◽  
Tharek Abd RAHMAN ◽  
Md. Nour HINDIA ◽  
Jamal NASIR
Keyword(s):  
Millimeter Wave ◽  
Path Loss ◽  
Wave Band ◽  
Loss Model ◽  
Path Loss Model ◽  
5G Network ◽  
Millimeter Wave Band

scholarly journals Path Loss Model for Outdoor Parking Environments at 28 GHz and 38 GHz for 5G Wireless Networks

Symmetry ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 672 ◽  
Author(s):  
Ahmed Al-Samman ◽  
Tharek Rahman ◽  
MHD Hindia ◽  
Abdusalama Daho ◽  
Effariza Hanafi
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Millimeter Wave ◽  
Path Loss ◽  
Loss Model ◽  
Frequency Bands ◽  
Path Loss Model ◽  
Parking Lot ◽  
Loss Models ◽  
5G Systems

It has been widely speculated that the performance of the next generation Internet of Things (IoT) based wireless network should meet a transmission speed on the order of 1000 times more than current wireless networks; energy consumption on the order of 10 times less and access delay of less than 1 ns that will be provided by future 5G systems. To increase the current mobile broadband capacity in future 5G systems, the millimeter wave (mmWave) band will be used with huge amounts of bandwidth available in this band. Hence, to support this wider bandwith at the mmWave band, new radio access technology (RAT) should be provided for 5G systems. The new RAT with symmetry design for downlink and uplink should support different scenarios such as device to device (D2D) and multi-hop communications. This paper presents the path loss models in parking lot environment which represents the multi-end users for future 5G applications. To completely assess the typical performance of 5G wireless network systems across these different frequency bands, it is necessary to develop path loss (PL) models across these wide frequency ranges. The short wavelength of the highest frequency bands provides many scatterings from different objects. Cars and other objects are some examples of scatterings, which represent a critical issue at millimeter-wave bands. This paper presents the large-scale propagation characteristics for millimeter-wave in a parking lot environment. A new physical-based path loss model for parking lots is proposed. The path loss was investigated based on different models. The measurement was conducted at 28 GHz and 38 GHz frequencies for different scenarios. Results showed that the path loss exponent values were approximately identical at 28 GHz and 38 GHz for different scenarios of parking lots. It was found that the proposed compensation factor varied between 10.6 dB and 23.1 dB and between 13.1 and 19.1 in 28 GHz and 38 GHz, respectively. The proposed path loss models showed that more compensation factors are required for more scattering objects, especially at 28 GHz.

scholarly journals Investigation of Future 5G-IoT Millimeter-Wave Network Performance at 38 GHz for Urban Microcell Outdoor Environment

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 495 ◽  
Author(s):  
Faizan Qamar ◽  
MHD Nour Hindia ◽  
Kaharudin Dimyati ◽  
Kamarul Ariffin Noordin ◽  
Mohammed Bahjat Majed ◽  
...  
Keyword(s):  
Frequency Spectrum ◽  
Millimeter Wave ◽  
Network Performance ◽  
Geographical Area ◽  
Measurement Data ◽  
Path Loss ◽  
Outdoor Environment ◽  
Line Of Sight ◽  
Loss Model ◽  
Path Loss Model

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 efficiency 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 efficiency. 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.

scholarly journals Feasibility study of 28 GHz and 38 GHz millimeter-wave technologies for fog radio access networks using multi-slope path loss model

2021 ◽  
pp. 101401
Author(s):  
Alaa Bani-Bakr ◽  
Kaharudin Dimyati ◽  
MHD Nour Hindia ◽  
Wei Ru Wong ◽  
Muhammad Ali Imran
Keyword(s):  
Millimeter Wave ◽  
Feasibility Study ◽  
Path Loss ◽  
Access Networks ◽  
Loss Model ◽  
Path Loss Model ◽  
Radio Access Networks ◽  
Radio Access

Path Loss Model in Crowded Outdoor Environments Considering Multiple Human Body Shadowing of Multipath at 4.7GHz and 26.4GHz

2019 ◽  
Vol E102.B (8) ◽  
pp. 1676-1688 ◽  
Author(s):  
Mitsuki NAKAMURA ◽  
Motoharu SASAKI ◽  
Wataru YAMADA ◽  
Naoki KITA ◽  
Takeshi ONIZAWA ◽  
...  
Keyword(s):  
Human Body ◽  
Path Loss ◽  
Loss Model ◽  
Path Loss Model ◽  
Outdoor Environments

A new path loss model based on the volumetric occupancy rate for the pine forests at 5G frequency band

2020 ◽  
pp. 1-10
Author(s):  
Abdullah Genc
Keyword(s):  
Path Loss ◽  
Forest Area ◽  
Occupancy Rate ◽  
Loss Model ◽  
Path Loss Model ◽  
Model Based ◽  
Proposed Model ◽  
Pine Trees ◽  
Foliage Density ◽  
Reference Measurements

Abstract In this paper, a new empirical path loss model based on frequency, distance, and volumetric occupancy rate is generated at the 3.5 and 4.2 GHz in the scope of 5G frequency bands. This study aims to determine the effect of the volumetric occupancy rate on path loss depending on the foliage density of the trees in the pine forest area. Using 4.2 GHz and the effect of the volumetric occupancy rate contributes to the literature in terms of novelty. Both the reference measurements to generate a model and verification measurements to verify the proposed models are conducted in three different regions of the forest area with double ridged horn antennas. These regions of the artificial forest area consist of regularly sorted and identical pine trees. Root mean square error (RMSE) and R-squared values are calculated to evaluate the performance of the proposed model. For 3.5 and 4.2 GHz, while the RMSEs are 3.983 and 3.883, the values of R-squared are 0.967 and 0.963, respectively. Additionally, the results are compared with four path loss models which are commonly used in the forest area. The proposed one has the best performance among the other models with values 3.98 and 3.88 dB for 3.5 and 4.2 GHz.

Path Loss Model of the Maritime Wireless Communication in the Seas of Indonesia

2020 ◽  
Author(s):  
Arumjeni Mitayani ◽  
Galih Nugraha Nurkahfi ◽  
Mochamad Mardi Marta Dinata ◽  
Vita Awalia Mardiana ◽  
Nasrullah Armi ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Path Loss ◽  
Loss Model ◽  
Path Loss Model

A Multi-Wall Path Loss Model for Indoor UWB Propagation

2005 ◽  
Author(s):  
A. Durantini ◽  
D. Cassioli
Keyword(s):  
Path Loss ◽  
Loss Model ◽  
Path Loss Model

Elevation-angle based two-ray path loss model for Air-to-Ground wireless channels

2021 ◽  
pp. 100393
Author(s):  
N.H. Ranchagoda ◽  
K. Sithamparanathan ◽  
M. Ding ◽  
A. Al-Hourani ◽  
K.M. Gomez
Keyword(s):  
Wireless Channels ◽  
Elevation Angle ◽  
Path Loss ◽  
Loss Model ◽  
Path Loss Model ◽  
Ray Path
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