scholarly journals Concepts of Hyperloop Wireless Communication at 1200 km/h: 5G, Wi-Fi, Propagation, Doppler and Handover

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 983
Author(s):  
Ali Tavsanoglu ◽  
César Briso ◽  
Diego Carmena-Cabanillas ◽  
Rafael B. Arancibia
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
High Capacity ◽  
Careful Study ◽  
System A ◽  
5G Network ◽  
Vacuum Tubes ◽  
Guided Propagation ◽  
Confined Environment ◽  
New Generation

The new generation of capsules that circulate through vacuum tubes at speeds up to 1200 km/h, which is being developed, demands communication systems that can operate at these speeds with high capacity and quality of service. Currently, the two technologies available are the new generation of 802.11ax networks and 5G NR. Using these technologies at such high speeds in a confined environment requires a careful study and design of the configuration of the network and optimization of the physical interface. This paper describes the requirements for critical and business communications, proposing a WLAN and 5G network design based on the analysis of the propagation characteristics and constraints of vacuum tubes and using propagation measurements and simulations made in similar environments at frequencies of 2.5/5.7/24 GHz. These measurements and simulations show that propagation losses in this environment are low (4–5 dB/100 m), as a consequence of the guided propagation, so that the use of bands is preferred. Finally, considering the propagation constraints and requirements of a Hyperloop system, a complete wireless communication system is proposed using two networks with 802.11 and 5G technology.

scholarly journals A Comprehensive Review on Multiband Reconfigurable Antenna

2021 ◽  
pp. 377-388
Author(s):  
Preeti Rani ◽  
◽  
Tejbir Singh ◽  
Meenu Kaushik ◽  
Vishant Gahlaut
Keyword(s):  
Wireless Communication ◽  
High Performance ◽  
Wireless System ◽  
The Past ◽  
Multiband Antennas ◽  
Single Antenna ◽  
Interference Level ◽  
System A ◽  
New Generation

The advancement of wireless communication is markedly accountable from the past two decades. A variety of designs and techniques have been established in the domain of reconfigurable multiband antennas for different wireless services. Now a days, a high quality of communication with reduced size is required for new generation wireless system. A multiband reconfigurable functionality offers a flexible and high-performance design by single antenna only. A brief review on multiband antenna with different reconfigurable techniques is presented in this paper. Moreover, the new possibilities for future wireless communication system have been demonstrated. A reconfigurable system along with minimal interference level over the fixed or non-reconfigurable transceivers has been discussed in detail.

scholarly journals The Role of Optical Wireless Communication Technologies in 5G/6G and IoT Solutions: Prospects, Directions, and Challenges

2019 ◽  
Vol 9 (20) ◽  
pp. 4367 ◽  
Author(s):  
Mostafa Zaman Chowdhury ◽  
Md. Shahjalal ◽  
Moh. Khalid Hasan ◽  
Yeong Min Jang
Keyword(s):  
Wireless Communication ◽  
Service Quality ◽  
Communication Systems ◽  
High Capacity ◽  
Visible Light Communication ◽  
Heterogeneous Traffic ◽  
Fourth Generation ◽  
Optical Wireless Communication ◽  
Optical Wireless

The upcoming fifth- and sixth-generation (5G and 6G, respectively) communication systems are expected to deal with enormous advances compared to the existing fourth-generation communication system. The few important and common issues related to the service quality of 5G and 6G communication systems are high capacity, massive connectivity, low latency, high security, low-energy consumption, high quality of experience, and reliable connectivity. Of course, 6G communication will provide several-fold improved performances compared to the 5G communication regarding these issues. The Internet of Things (IoT) based on the tactile internet will also be an essential part of 5G-and-beyond (5GB) (e.g., 5G and 6G) communication systems. Accordingly, 5GB wireless networks will face numerous challenges in supporting the extensive verities of heterogeneous traffic and in satisfying the mentioned service-quality-related parameters. Optical wireless communication (OWC), along with many other wireless technologies, is a promising candidate for serving the demands of 5GB communication systems. This review paper clearly presents how OWC technologies, such as visible light communication, light fidelity, optical camera communication, and free space optics communication, will be an effective solution for successful deployment of 5G/6G and IoT systems.

scholarly journals Millimeter wave patch antenna array for 5G wireless communication systems

2019 ◽  
Vol 27 (2) ◽  
pp. 105-110
Author(s):  
A. B. Gnilenko ◽  
S. V. Plaksin
Keyword(s):  
Wireless Communication ◽  
Antenna Array ◽  
Millimeter Wave ◽  
Antenna Arrays ◽  
Communication System ◽  
Patch Antenna ◽  
Communication Systems ◽  
High Capacity ◽  
Angular Width ◽  
Wireless Communication System

Millimeter waves are now considered as an important part of 5G spectrum. Higher frequencies provide larger bandwidth giving the ability to support very high data rate, ultra high capacity and very low latency. The utilization of millimeter wave frequency bands for 5G mobile applications requires effective solutions in the design of antennas and antenna arrays which are the key parts of modern communication systems. In this paper a 4x4 microstrip patch antenna array sub-module is presented to be a part of 5G wireless communication system. The antenna array is designed and optimized to operate at a frequency of 85 GHz which corresponds to the middle of the second atmospheric transparency window. The antenna array is simulated using the time domain solver of the CST Microwave Studio software package. Simulation results are demonstrated and discussed for an optimized array. The designed patch antenna array provides good directivity characteristics with a main lobe magnitude of 16 dBi, angular width of 28 degree and can be applied as a part of a wireless communication system operating at a high frequency band of 5G frequency range.

scholarly journals Developed channel propagation models and path loss measurements for wireless communication systems using regression analysis techniques

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Yahia A. Zakaria ◽  
Ehab K. I. Hamad ◽  
A. S. Abd Elhamid ◽  
K. M. El-Khatib
Keyword(s):  
Regression Analysis ◽  
Wireless Communication ◽  
Communication Systems ◽  
Large Scale ◽  
High Capacity ◽  
Path Loss ◽  
Signal Strength ◽  
Separation Distance ◽  
Coverage Area ◽  
Propagation Models

Abstract Background The development of powerful and flexible management addresses is due to the improvement of deeply reliable gadgets and the advancement of the concept of cellular. The cellular principle was a major way of solving the wavelength crowding problem and the user capacity. It offered high capacity without major technological changes with limited allocation in spectrum. Wireless communication is an innovation in media transmission that allows remote transmission in all types of terrain between convenient gadgets. For estimating a transmitter 's radio coverage area, propagation models that anticipate the mean signal strength for an arbitrary transmitter–receiver separation distance are crucial as they are called large-scale propagation models so even though they define the average signal strength over long periods of time and large distances from the transmitter. Results Developed propagation models are presented according to the measured path loss values in exemplary urban and suburban areas at the operating frequency of 3.5 ghz by using the regression analysis. The measurements are implemented by using a spectrum analyzer FSH6 to get the channel response as shown in the stated tables and graphs. Based on the obtained results, it was observed that the path loss could be calculated as a function of distance and during the practical measurements 32 m was precise as a presumption for the break point distance. The values of path loss exponent (n) are defined and calculated for both of urban and suburban regions. Measurements results are analyzed and compared in order to study their influence for every specific environment. It was noticed that any radio signal will suffer attenuation when it travels from the transmitter to the receiver as a variety of various phenomena give rise to this radio path loss. Conclusions The interaction between both the electromagnetic radiation and the environment tends to decrease the quality of the signal being sent from the transmitter to the destination which causes the loss of the path. Propagation models are the basis for channel estimation, as they attempt to identify how a radio transmission changes from the transmitter to the receiver throughout its path. The gained results from this research will be supportive for the arrangement of network planners and researchers as proof and directory materials before future location establishment.

scholarly journals A Novel Fixed Multiband Micro strip Patch Antenna Design for New Generation Wireless Communication Systems

2015 ◽  
pp. 320-323
Author(s):  
Navin M George ◽  
S Merlin Gilbert Raj
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Return Loss ◽  
Cost Effective ◽  
Wireless Communication Systems ◽  
Antenna Gain ◽  
Multiple Frequency ◽  
Communication Devices ◽  
Fixed Model ◽  
New Generation

This paper presents the design of a fixed antenna of multiple frequency bands. The antenna proposed here will be used in new generation wireless communication devices. This antenna has the ability to radiate multiple bandwidths with a less return loss and improved antenna gain. This model is highly compact and cost effective one. The fixed model is simulated and implemented in hardware and the results are compared.

scholarly journals Performance Evaluation of the Use of Filter Bank Multi-carrier waveform in Different mmwave Frequency Bands

2021 ◽  
pp. 36-41
Author(s):  
Saif A. Khudhair ◽  
◽  
Mandeep Jit Singh
Keyword(s):  
Wireless Communication ◽  
Filter Bank ◽  
High Capacity ◽  
Base Station ◽  
Small Cells ◽  
60 Ghz ◽  
High Demand ◽  
Frequency Bands ◽  
5G Network ◽  
High Bandwidth

The meet of high demand of wireless communication is the topic of research in future wireless networks. This high demand comes from the increase use of mobile devices and sensors in the real environment. Internet of Things (IoT) and machine communication are types of technologies that increase the wireless communication demand. Because of this, there is a need of producing some techniques and technologies that are able to meet this requirement. Fifth Generation (5G) network is the futre promising wireless network that can be used to enhance a lot of performance metrics such as spectral and energy efficiencies, high capacity and low latency. Some technologies are used with 5G network; one of them is the use of short range communication using Millimeter waves (mmwave) frequency bands which gives high data rate and high bandwidth to be used in communication by using small cells of coverage. Massive Multiple-Input Multiple-Output (M-MIMO) is the technology used to meet the high capacity users in the network, It suffers from the high Inter-Carrier-Interference (ICI) due to the use of high number of antennas at the Base Station (BS). To mitigate this, the use of multicarrier waveforms is one of the techniques used in this paper. The use of Filter Bank Multi-Carrier (FBMC) is introduced here in terms of Bit Error Rate (BER) and throughput. The paper simulates the use of FBMC with high order basband QAM modulation (M-QAM) for two different mmwave frequency bands such as 28 GHz and 60 GHz with comparison with 2.6 GHz which is widely used nowadays. The simulation results show that there is less than 0.5 dB and 3 dB SNR difference between 2.6 GHz and 28 GHz and 60 GHz respectively. This indicates that 28 GHz can be used in outdoor communication instead of 2.6 GHz with high bandwidth, and 60 GHz can be used in indoor communication with extremely high bandwidth offering.

Performance Evaluation of Adaptive Indoor Matched Rake Receiver Using Multiple-Combining Techniques

2014 ◽  
Vol 699 ◽  
pp. 921-930
Author(s):  
Rashid Ali Fayadh ◽  
Mohd Fareq Abd Malek ◽  
Hilal Adnan Fadhil ◽  
Norshafinash Saudin
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Additive White Gaussian Noise ◽  
High Capacity ◽  
Rake Receiver ◽  
Ultra Wideband ◽  
Line Of Sight ◽  
Wireless Communication Systems

This paper discusses the enhancement of the wireless rake receiver for high speed and short distance indoor ultra wideband (UWB) propagation with line-of sight (LOS) and non line-of sight (NLOS) channel models. The proposed matched rake receiver uses three main combining techniques, maximum ratio combining (MRC), equal gain combining (EGC), and selective combining (SC) to capture most of the energy of the multi-path components (MPCs). When the wireless communication systems work with high capacity and high speed in transmission and reception scenarios, there will be a serious challenge defined as inter-symbol interference (ISI) during the reception process. The ISI causes increasing in the bit error rate (BER) when the wireless communication systems work with high bit rate propagation. The matched rake receiver scheme was designed to suppress ISI by maximizing the signal to noise ratio (SNR) before constructing the desired signal in decision circuit and effectively the system enhancement is improved. After adding additive white Gaussian noise (AWGN) to the received signal, the improvement is cleared comparing with the theoretical results that has no AWGN. During the comparison of the simulation results, MRC partial rake receiver of less complexity showed better performance than the EGC and SC rake receivers.

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