Advances in Wireless Communications Systems

A special issue of Information (ISSN 2078-2489). This special issue belongs to the section "Information and Communications Technology".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 26157

Special Issue Editors


E-Mail Website
Guest Editor
Department of Information Engineering, University of Florence, 50121 Firenze, FI, Italy
Interests: physical layer security; UWB positioning systems; visible light communications; molecular communications; body area networks; 6G; 5G; networks for healthcare applications
Special Issues, Collections and Topics in MDPI journals

E-Mail
Guest Editor
Department of Information Engineering, University of Florence, 50121 Firenze FI, Italy
Interests: physical layer security; UWB positioning systems; molecular communications; body area networks; networks for healthcare applications

E-Mail Website
Guest Editor
Department of Information Engineering, University of Firenze, Via S. Marta 3, 50139 Firenze, Italy
Interests: physical layer security; UWB positioning systems; visible light communications; molecular communications; body area networks; 6G; 5G; networks for healthcare applications
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent period, fifth generation (5G) of mobile communications helped to bridge the growth of data and device connections demand. This Special Issue of Advances in Wireless Communications Systems aims to investigate new challenges and opportunities, which will be enabled by sixth generation (6G) of mobile communications.

The next network protocols should take account of resources allocation and optimization, also provided by new artificial intelligence algorithms or Fog computing and networking systems. Moreover, massive data transmission should require a high level of cybersecurity, including physical layer security. Last but not least, to satisfy next network performance demand, new spectral bands in radio and optical frequencies are required.

Papers should highlight either theoretical issues or practical applications, such as smart city with ultra-low latency communications, healthcare with massive density of wireless body area networks (WBANs), Internet of Things with ultra-low power communications, infotainment with high throughput for ultra-high multimedia definition, etc.

The contribution topics of primary interest include, but are not limited to:

  • Network protocols
  • Resources allocation techniques
  • Artificial Intelligence applied in communications systems
  • Radio Frequencies (RF) enabling 6G
  • Optical wireless communications
  • Vehicular communications
  • Wireless body area networks (WBANs)
  • Ultra-low power communications
  • Network performance
  • Fog computing and networking
  • 6G communications
  • Physical layer security
  • Cybersecurity systems

Dr. Stefano Caputo
Dr. Lorenzo Biotti
Dr. Lorenzo Mucchi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Information is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Network protocol and resources allocation
  • artificial intelligence
  • Security
  • RF enabling 6G
  • optical wireless communications
  • smart city applications
  • healthcare applications
  • Internet of Things

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Related Special Issue

Published Papers (8 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Jump to: Review

21 pages, 882 KiB  
Article
Improved Spacecraft Authentication Method for Satellite Internet System Using Residue Codes
by Alexandr Anatolyevich Olenev, Igor Anatolyevich Kalmykov, Vladimir Petrovich Pashintsev, Nikita Konstantinovich Chistousov, Daniil Vyacheslavovich Dukhovnyj and Natalya Igorevna Kalmykova
Information 2023, 14(7), 407; https://doi.org/10.3390/info14070407 - 15 Jul 2023
Cited by 1 | Viewed by 1305
Abstract
Low-orbit satellite internet (LOSI) expands the scope of the Industrial Internet of Things (IIoT) in the oil and gas industry (OGI) to include areas of the Far North. However, due to the large length of the communication channel, the number of threats and [...] Read more.
Low-orbit satellite internet (LOSI) expands the scope of the Industrial Internet of Things (IIoT) in the oil and gas industry (OGI) to include areas of the Far North. However, due to the large length of the communication channel, the number of threats and attacks increases. A special place among them is occupied by relay spoofing interference. In this case, an intruder satellite intercepts the control signal coming from the satellite (SC), delays it, and then imposes it on the receiver located on the unattended OGI object. This can lead to a disruption of the facility and even cause an environmental disaster. To prevent a spoofing attack, a satellite authentication method has been developed that uses a zero-knowledge authentication protocol (ZKAP). These protocols have high cryptographic strength without the use of encryption. However, they have a significant drawback. This is their low authentication speed, which is caused by calculations over a large module Q (128 bits or more). It is possible to reduce the time of determining the status of an SC by switching to parallel computing. To solve this problem, the paper proposes to use residue codes (RC). Addition, subtraction, and multiplication operations are performed in parallel in RC. Thus, a correct choice of a set of modules of RC allows for providing an operating range of calculations not less than the number Q. Therefore, the development of a spacecraft authentication method for the satellite internet system using RC that allows for reducing the authentication time is an urgent task. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

15 pages, 1310 KiB  
Article
M-Ary Direct Modulation Chirp Spread Spectrum for Spectrally Efficient Communications
by Jocelyn Edinio Zacko Gbadoubissa, Ado Adamou Abba Ari, Emanuel Radoi and Abdelhak Mourad Gueroui
Information 2023, 14(6), 323; https://doi.org/10.3390/info14060323 - 6 Jun 2023
Cited by 1 | Viewed by 3441
Abstract
Spread spectrum techniques, such as the Chirp Spread Spectrum (CSS) used by LoRa technology, are important for machine-to-machine communication in the context of the Internet of Things. They offer high processing gain, reliable communication over long ranges, robustness to interference and noise in [...] Read more.
Spread spectrum techniques, such as the Chirp Spread Spectrum (CSS) used by LoRa technology, are important for machine-to-machine communication in the context of the Internet of Things. They offer high processing gain, reliable communication over long ranges, robustness to interference and noise in harsh environments, etc. However, these features are compromised by their poor spectral efficiency, resulting in a very low data transmission rate. This paper deals with a spectrally efficient variant of CSS. The system uses M-ary phase keying to modulate the data and exploits CSS’s properties to transmit the modulated symbols as overlapping chirps. The overlapping of chirp signals may affect the system performance due to inter-symbol interference. Therefore, we analyse the relationship between the number of overlaps and the effect of inter-symbol interference (ISI), and we also determine the BER expression as a function of the number of overlaps. Finally, we derive the optimal number of overlapping symbols that corresponds to the minimum error probability. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

11 pages, 2871 KiB  
Article
Blind Estimation of Spreading Code Sequence of QPSK-DSSS Signal Based on Fast-ICA
by Lu Xu, Xiaxia Liu and Yijia Zhang
Information 2023, 14(2), 112; https://doi.org/10.3390/info14020112 - 10 Feb 2023
Cited by 1 | Viewed by 1994
Abstract
Most of the existing estimation methods of spreading code sequence are not suitable for the QPSK-DSSS. We propose a spreading code sequence estimation method based on fast independent component analysis (Fast-ICA). It mainly includes signal preprocessing, calculations of separation matrix, and spreading code [...] Read more.
Most of the existing estimation methods of spreading code sequence are not suitable for the QPSK-DSSS. We propose a spreading code sequence estimation method based on fast independent component analysis (Fast-ICA). It mainly includes signal preprocessing, calculations of separation matrix, and spreading code sequence. Firstly, the received signal is segmented according to the period of the spreading code sequence, and the covariance matrix can be calculated. Then, the signal subspace and corresponding eigenvalues are obtained by eigenvalue decomposition of the covariance matrix. Subsequently, the received signal matrix needs to be whitened. Finally, the Fast-ICA algorithm is used to find the separation matrix to estimate the in-phase and orthogonal spreading code sequence. The experiment result shows that the estimation of the spreading code sequence can be carried out based on Fast-ICA under a low SNR of −12 dB. Compared with the constant modulus algorithm (CMA) and the decomposition method for the real part of the self-covariance matrix (EVD-R), this method has a better performance. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

19 pages, 2784 KiB  
Article
Model for Interference Evaluation in 5G Millimeter-Wave Ultra-Dense Network with Location-Aware Beamforming
by Grigoriy Fokin and Dmitriy Volgushev
Information 2023, 14(1), 40; https://doi.org/10.3390/info14010040 - 9 Jan 2023
Cited by 10 | Viewed by 2930
Abstract
Location-Aware Beamforming (LAB) in Ultra-Dense Networks (UDN) is a breakthrough technology for 5G New Radio (NR) and Beyond 5G (B5G) millimeter wave (mmWave) communication. Directional links with narrow antenna half-power beamwidth (HPBW) and massive multiple-input multiple-output (mMIMO) processing systems allows to increase transmitter [...] Read more.
Location-Aware Beamforming (LAB) in Ultra-Dense Networks (UDN) is a breakthrough technology for 5G New Radio (NR) and Beyond 5G (B5G) millimeter wave (mmWave) communication. Directional links with narrow antenna half-power beamwidth (HPBW) and massive multiple-input multiple-output (mMIMO) processing systems allows to increase transmitter and receiver gains and thus facilitates to overcome high path loss in mmWave. Well known problem of pencil beamforming (BF) is in construction of precoding vectors at the transmitter and combining vectors at the receiver during directional link establishing and its maintaining. It is complicated by huge antenna array (AA) size and required channel state information (CSI) exchange, which is time consuming for vehicle user equipment (UE). Knowledge of transmitter and receiver location, UE or gNodeB (gNB), could significantly alleviate directional link establishment and space division multiple access (SDMA) implementation. Background of SDMA is in efficient maintenance of affordable level of interference, and the purpose of this research is in signal-to-interference ratio (SIR) evaluation in various 5G UDN scenarios with LAB. The method, used to evaluate SIR, is link level simulation, and results are obtained from publicly released open-source simulator. Contribution of research includes substantiation of allowable UE density, working with LAB. Practical implications include recommendations on terrestrial and angular separation of two UE in 5G UDN scenarios. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

12 pages, 1826 KiB  
Article
Distributed Edge Computing for Resource Allocation in Smart Cities Based on the IoT
by Omar Abdulkareem Mahmood, Ali R. Abdellah, Ammar Muthanna and Andrey Koucheryavy
Information 2022, 13(7), 328; https://doi.org/10.3390/info13070328 - 7 Jul 2022
Cited by 22 | Viewed by 3347
Abstract
Smart cities using the Internet of Things (IoT) can operate various IoT systems with better services that provide intelligent and efficient solutions for various aspects of urban life. With the rapidly growing number of IoT systems, the many smart city services, and their [...] Read more.
Smart cities using the Internet of Things (IoT) can operate various IoT systems with better services that provide intelligent and efficient solutions for various aspects of urban life. With the rapidly growing number of IoT systems, the many smart city services, and their various quality of service (QoS) constraints, servers face the challenge of allocating limited resources across all Internet-based applications to achieve an efficient per-formance. The presence of a cloud in the IoT system of a smart city results in high energy con-sumption and delays in the network. Edge computing is based on a cloud computing framework where computation, storage, and network resources are moved close to the data source. The IoT framework is identical to cloud computing. The critical issue in edge computing when executing tasks generated by IoT systems is the efficient use of energy while maintaining delay limitations. In this paper, we study a multicriteria optimization approach for resource allocation with distributed edge computing in IoT-based smart cities. We present a three-layer network architecture for IoT-based smart cities. An edge resource allocation scheme based on an auctionable approach is proposed to ensure efficient resource computation for delay-sensitive tasks. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

17 pages, 2894 KiB  
Article
Design and Analysis of Joint Source-Channel Code System with Fixed-Length Code
by Han Bao, Can Zhang and Shaoshuai Gao
Information 2022, 13(6), 281; https://doi.org/10.3390/info13060281 - 31 May 2022
Cited by 2 | Viewed by 2043
Abstract
As the demands of multimedia and data services increase, efficient communication systems are being investigated to meet the high data rate requirements. Joint source-channel coding (JSCC) schemes were proposed for improving overall system performance. However, existing JSCC systems may suffer a symbol error [...] Read more.
As the demands of multimedia and data services increase, efficient communication systems are being investigated to meet the high data rate requirements. Joint source-channel coding (JSCC) schemes were proposed for improving overall system performance. However, existing JSCC systems may suffer a symbol error rate (SER) performance loss when residual source redundancy is not fully exploited. This paper presents a novel, low-complexity JSCC system, which consists of a fixed-length source block code and an irregular convolutional channel code. A simple approach is proposed to design source codes that minimize the SER of source detection and guarantee the convergence of iterative source-channel decoding (ISCD). To improve the waterfall performance of ISCD, the channel code is optimized by using the extrinsic information transfer (EXIT) chart and the concept of irregular code. The channel code is constituted by recursive non-systematic convolutional (RNSC) subcodes. The weights of subcodes are optimized to make the EXIT curves of the channel decoder and the source decoder well-matched, and therefore, a near-capacity performance is achieved. Simulation results show that the proposed system achieves more than 1 dB gains and 0.3 dB gains compared to the separate source-channel code system and the other optimal JSCC systems, respectively. Additionally, the performance of the proposed system is within 1 dB deviation from the Shannon limit capacity. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

16 pages, 4879 KiB  
Article
Atmospheric Propagation Modelling for Terrestrial Radio Frequency Communication Links in a Tropical Wet and Dry Savanna Climate
by Joseph Isabona, Agbotiname Lucky Imoize, Stephen Ojo, Cheng-Chi Lee and Chun-Ta Li
Information 2022, 13(3), 141; https://doi.org/10.3390/info13030141 - 7 Mar 2022
Cited by 15 | Viewed by 4230
Abstract
Atmospheric impairment-induced attenuation is the prominent source of signal degradation in radio wave communication channels. The computation-based modeling of radio wave attenuation over the atmosphere is the stepwise application of relevant radio propagation models, data, and procedures to effectively and prognostically estimate the [...] Read more.
Atmospheric impairment-induced attenuation is the prominent source of signal degradation in radio wave communication channels. The computation-based modeling of radio wave attenuation over the atmosphere is the stepwise application of relevant radio propagation models, data, and procedures to effectively and prognostically estimate the losses of the propagated radio signals that have been induced by atmospheric constituents. This contribution aims to perform a detailed prognostic evaluation of radio wave propagation attenuation due to rain, free space, gases, and cloud over the atmosphere at the ultra-high frequency band. This aim has been achieved by employing relevant empirical atmospheric data and suitable propagation models for robust prognostic modeling using experimental measurements. Additionally, the extrapolative attenuation estimation results and the performance analysis were accomplished by engaging different stepwise propagation models and computation parameters often utilized in Earth–satellite and terrestrial communications. Results indicate that steady attenuation loss levels rise with increasing signal carrier frequency where free space is more dominant. The attenuation levels attained due to rain, cloud, atmospheric gases, and free space are also dependent on droplet depths, sizes, composition, and statistical distribution. While moderate and heavy rain depths achieved 3 dB and 4 dB attenuations, the attenuation due to light rainfall attained a 2.5 dB level. The results also revealed that attenuation intensity levels induced by atmospheric gases and cloud effects are less than that of rain. The prognostic-based empirical attenuation modeling results can provide first-hand information to radio transmission engineers on link budgets concerning various atmospheric impairment effects during radio frequency network design, deployment, and management, essentially at the ultra-high frequency band. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

Review

Jump to: Research

18 pages, 790 KiB  
Review
Ultra-Reliable Low-Latency Communications: Unmanned Aerial Vehicles Assisted Systems
by Mohamed Osama, Abdelhamied A. Ateya, Shaimaa Ahmed Elsaid and Ammar Muthanna
Information 2022, 13(9), 430; https://doi.org/10.3390/info13090430 - 12 Sep 2022
Cited by 10 | Viewed by 4796
Abstract
Ultra-reliable low-latency communication (uRLLC) is a group of fifth-generation and sixth-generation (5G/6G) cellular applications with special requirements regarding latency, reliability, and availability. Most of the announced 5G/6G applications are uRLLC that require an end-to-end latency of milliseconds and ultra-high reliability of communicated data. [...] Read more.
Ultra-reliable low-latency communication (uRLLC) is a group of fifth-generation and sixth-generation (5G/6G) cellular applications with special requirements regarding latency, reliability, and availability. Most of the announced 5G/6G applications are uRLLC that require an end-to-end latency of milliseconds and ultra-high reliability of communicated data. Such systems face many challenges since traditional networks cannot meet such requirements. Thus, novel network structures and technologies have been introduced to enable such systems. Since uRLLC is a promising paradigm that covers many applications, this work considers reviewing the current state of the art of the uRLLC. This includes the main applications, specifications, and main requirements of ultra-reliable low-latency (uRLL) applications. The design challenges of uRLLC systems are discussed, and promising solutions are introduced. The virtual and augmented realities (VR/AR) are considered the main use case of uRLLC, and the current proposals for VR and AR are discussed. Moreover, unmanned aerial vehicles (UAVs) are introduced as enablers of uRLLC. The current research directions and the existing proposals are discussed. Full article
(This article belongs to the Special Issue Advances in Wireless Communications Systems)
Show Figures

Figure 1

Back to TopTop