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.

Single-scatter path loss model of LED-based non-line-of-sight ultraviolet communications

2021 ◽  
Author(s):  
Tian Cao ◽  
Xinyu Gao ◽  
Tianfeng Wu ◽  
Changyong Pan ◽  
Jian Song
Keyword(s):  
Path Loss ◽  
Line Of Sight ◽  
Loss Model ◽  
Path Loss Model ◽  
Single Scatter ◽  
Non Line Of Sight

scholarly journals A single-scatter path loss model for non-line-of-sight ultraviolet channels

2012 ◽  
Vol 20 (9) ◽  
pp. 10359 ◽  
Author(s):  
Yong Zuo ◽  
Houfei Xiao ◽  
Jian Wu ◽  
Yan Li ◽  
Jintong Lin
Keyword(s):  
Path Loss ◽  
Line Of Sight ◽  
Loss Model ◽  
Path Loss Model ◽  
Single Scatter ◽  
Non Line Of Sight

scholarly journals Validation of a non-line-of-sight path-loss model for V2V communications at street intersections

2013 ◽  
Author(s):  
Taimoor Abbas ◽  
Andreas Thiel ◽  
Thomas Zemen ◽  
Christoph F. Mecklenbrauker ◽  
Fredrik Tufvesson
Keyword(s):  
Path Loss ◽  
Line Of Sight ◽  
Loss Model ◽  
Path Loss Model ◽  
V2v Communications ◽  
Non Line Of Sight

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 Path Loss Model with Antenna Height Dependency under Indoor Stair Environment

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yu Yu ◽  
Yang Liu ◽  
Wen-Jun Lu ◽  
Hong-Bo Zhu
Keyword(s):  
Standard Deviation ◽  
Maximum Likelihood ◽  
Path Loss ◽  
Likelihood Estimation ◽  
Least Square ◽  
Line Of Sight ◽  
Loss Model ◽  
Path Loss Model ◽  
Proposed Model ◽  
Receiving Antenna

A novel, receiving antenna-height-dependent path loss model under indoor stair environment is presented. The effect of a cross-beam in the stairs is also considered. The proposed model can be applied to describe both of the line-of-sight (LOS) and the non-LOS (NLOS) cases. By using least square criterion, the parameters of proposed model are extracted. Finally, using the maximum likelihood estimation, the precision of the proposed model is evaluated by the standard deviation of shadowing.

scholarly journals A Path Loss Model for Non-Line-of-Sight Ultraviolet Multiple Scattering Channels

2010 ◽  
Vol 2010 (1) ◽  
Author(s):  
Haipeng Ding ◽  
Zhengyuan Xu ◽  
Brian M. Sadler
Keyword(s):  
Multiple Scattering ◽  
Path Loss ◽  
Line Of Sight ◽  
Loss Model ◽  
Path Loss Model ◽  
Non Line Of Sight

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 Analysis of Object Location Accuracy for iBeacon Technology based on the RSSI Path Loss Model and Fingerprint Map

2016 ◽  
Vol 62 (4) ◽  
pp. 371-378 ◽  
Author(s):  
Damian E. Grzechca ◽  
Piotr Pelczar ◽  
Lukas Chruszczyk
Keyword(s):  
Moving Average ◽  
Path Loss ◽  
Propagation Model ◽  
Object Location ◽  
Line Of Sight ◽  
Average Error ◽  
Final Conclusion ◽  
Location Accuracy ◽  
Loss Model ◽  
Path Loss Model

Abstract This paper presents analysis of object location accuracy of a mobile device on the basis of the iBeacon technology. The research starts with radio signal strength indicator analysis along the corridor in order to create a path loss model for iBeacon. Two cases are taken into account: line of sight and non-line of sight for model creation. For both cases two tests: Chi-square, Shapiro-Wilk have been performed. It has also been checked if the HCI (Host Controller Interface) is a source with a memory. Acquired data have been filtered with different type of filters, e.g. median, moving average and then compared. Next, the authors evaluated the indoor positioning trilateration algorithms with the use of created model for exemplary hall. The RSSI map (radiomap) was created and the logarithm propagation model was designed. The logarithmic model estimated distance with average error 1.09m for 1 – 9m and 1.75m for 1-20m and after trilateration, the positions with average error 2.45m was achieved. A statistical analysis for acquiring data led to the final conclusion which enhanced knowledge about positioning based on the popular iBeacon technology.

Path loss model for outdoor environment at 17 GHz mm-wave band

2016 ◽  
Author(s):  
Ahmed M. Al-Samman ◽  
Tharek A. Rahman ◽  
Marwan H. Azmi ◽  
Nor R. Zulkefly ◽  
Abdallah M.S. Mataria
Keyword(s):  
Path Loss ◽  
Outdoor Environment ◽  
Wave Band ◽  
Loss Model ◽  
Path Loss Model
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