Zeitschriftenartikel: „Wireless communication systems“

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Kumar, Ankesh. "Energy-Efficient Wireless Communication Systems." International Journal of Science and Research (IJSR) 14, no. 2 (February 27, 2025): 536–42. https://doi.org/10.21275/sr25207120439.

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2

Prasad, R. "Wireless Broadband Communication Systems." IEEE Communications Magazine 35, no. 1 (January 1997): 18. http://dx.doi.org/10.1109/mcom.1997.568189.

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3

Ghassemlooy, Zabih, Stanislav Zvanovec, Mohammad-Ali Khalighi, Wasiu O. Popoola, and Joaquin Perez. "Optical wireless communication systems." Optik 151 (December 2017): 1–6. http://dx.doi.org/10.1016/j.ijleo.2017.11.052.

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4

Mistry, Vrushank. "Wireless Communication Technologies in HVAC Control Systems." International Journal of Science and Research (IJSR) 7, no. 7 (July 5, 2018): 1537–43. http://dx.doi.org/10.21275/sr24203192628.

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5

Kumar, Nitin. "Investigation and Analysis of the Impact of Interference on Wireless Communication Systems." Mathematical Statistician and Engineering Applications 70, no. 2 (February 26, 2021): 1010–18. http://dx.doi.org/10.17762/msea.v70i2.2154.

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Wireless communication systems are widely used in modern society, and their reliability is paramount to ensure effective communication. The aim of this investigation is to analyze the effects of interference on wireless communication systems. Interference is a major issue in wireless communication systems and can significantly degrade the system's performance. This paper presents a survey of investigations into the effect of interference on wireless communication systems. It provides an overview of the various types of interference and their effects on wireless communication systems, as well as techniques used to mitigate interference in wireless communication systems. It also reviews recent research on interference in wireless communication systems, which has shown that interference can significantly degrade the performance of wireless communication systems. The paper also discusses the challenges and future directions in the investigation of interference in wireless communication systems, such as the development of interference models that accurately capture the complex nature of interference, the design of interference mitigation techniques that can adapt to changing interference conditions, and the optimization of wireless communication systems to minimize the impact of interference. Finally, the survey highlights the importance of investigating the effect of interference on wireless communication systems and provides a comprehensive overview of the various techniques used to mitigate interference.

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Huang, Binhong, Hao Chen, Cheng Guo, Xiaodong Xu, Nan Ma, and Ping Zhang. "Semantic Communication on Digital Wireless Communication Systems." Electronics 14, no. 5 (February 27, 2025): 956. https://doi.org/10.3390/electronics14050956.

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Semantic communication is an effective technological approach for the integration of intelligence and communication, enabling more efficient and context-aware data transmission. In this paper, we propose a bit-conversion-based semantic communication transmission framework to ensure compatibility with existing wireless systems. Specifically, a series of physical layer processing modules in end-to-end transmission are designed. Additionally, we develop a semantic communication simulator to implement and evaluate this framework. To optimize the performance of this framework, we introduce a novel physical layer metric, termed Integer Error Rate (IER), which provides a more suitable evaluation criterion for semantic communication compared to the conventional bit error rate (BER). On the basis of the IER, a minimum Manhattan distance constellation mapping scheme is proposed, which can improve the transmission quality of semantic communication under the same BER condition. Furthermore, we propose a hybrid joint source–channel coding (JSCC) and separate source–channel coding (SSCC) transmission scheme. This scheme decouples the semantic quantization output from the modulation order by segmenting the bits to be transmitted. Simulation results demonstrate that the hybrid JSCC/SSCC transmission scheme can improve the semantic performance, such as the Peak Signal-to-Noise Ratio (PSNR), in low Signal-to-Noise Ratio (SNR) environments while reducing bandwidth usage by up to 50% compared to the benchmark scheme.

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Kawade, S., and T. Hodgkinson. "Licence-exempt wireless communication systems." BT Technology Journal 25, no. 2 (April 2007): 64–75. http://dx.doi.org/10.1007/s10550-007-0029-1.

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8

Yang, Qingyan, Virginia Sisiopiku, Jim A. Arnold, Paul Pisano, and Gary G. Nelson. "Assessment of Rural Intelligent Transportation System Wireless Communications Solutions." Transportation Research Record: Journal of the Transportation Research Board 1739, no. 1 (January 2000): 51–58. http://dx.doi.org/10.3141/1739-07.

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Rural transportation systems have different features and needs than their urban counterparts. To address safety and efficiency concerns in rural environments, advanced rural transportation systems (ARTS) test and deploy appropriate intelligent transportation systems (ITS) technologies, many of which require communication support. However, wireless communication systems that currently serve urban areas often are not available or suitable in rural environments. Thus, a need exists to identify communication solutions that are likely to address successfully the needs and features of ARTS applications. Current and emerging wireless communications systems and technologies have been systematically assessed with respect to rural ITS applications. Wireless communication functions associated with rural ITS functions are first identified. Then requirements for applicable communication technologies in the rural environment are defined. Existing and emerging wireless communication systems and technologies are reviewed and evaluated by a systematic process of assessing rural ITS wireless solutions. Finally, recommendations for future research and operational tests are offered. The analysis results are expected to benefit rural ITS planners by identifying suitable wireless solutions for different rural contexts.

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Javornik, Tomaž, Andrej Hrovat, and Aleš Švigelj. "Radio Technologies for Environment-Aware Wireless Communications." WSEAS TRANSACTIONS ON COMMUNICATIONS 21 (December 31, 2022): 250–66. http://dx.doi.org/10.37394/23204.2022.21.30.

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The contemporary wireless transmitter in addition to information symbols transmits also training symbols in order to help the receivers in the estimation of the information symbols by estimating the channel state information (CSI). In this paper, we look at existing wireless communication technologies in light of environment-aware wireless communications, which is a new concept of wireless communications that queries the time-invariant CSI from the local or global database, using information about the transmitter and receiver location. Thus, this study is the first critical review of the potential of today’s terrestrial wireless communication systems including wireless cellular technologies (GSM, UMTS, LTE, NR), wireless local area networks (WLANs), and wireless sensor networks (WSNs), for estimating CSI, the ratio between training and information symbols and the rate of channel variation, and the potential use of time invariable CSI in environment aware wireless communications. The research reveals, that early communication systems provide means for narrowband channel estimation and the CSI is only available as channel attenuation based on signal level measurements. By increasing the frequency bandwidth of communications, the CSI is estimated in some form of channel impulse response (CIR) in almost all currently used radio technologies, but this information is generally not available outside the communication systems. Also, the CSI is estimated only for the channel with active communications. The new radio technology (NR) offers the possibility of estimating the CIR for non-active channels as well, and thus the possibility of initiating environmentally aware wireless communications.

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Faris., A. Almalki. "COMPARATIVE AND QOS PERFORMANCE ANALYSIS OF TERRESTRIAL-AERIAL PLATFORMS-SATELLITES SYSTEMS FOR TEMPORARY EVENTS." International Journal of Computer Networks & Communications (IJCNC) 11, no. 6 (January 31, 2020): 111–33. https://doi.org/10.5281/zenodo.3632447.

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Wireless communications, nowadays, becomes a vital element of people’s daily life. Providing global connectivity in future communication systems via the heterogeneous network opens up many research topics to investigate potentialities, enabling technologies, and challenges from the perspective of the integrated wireless systems. This paper aims to drive a comprehensive and comparative study on terrestrial-aerial platforms- satellite wireless communications systems, includes their characteristics and unravelling challenges. The comparison focuses on issues that reportedly can evaluate any wireless systems for temporary events. These issues are altitude and coverage, Radio Frequency (RF) propagation, interference, handover, power supply constraints, deployment and maintenance challenges, reliability on special events or disaster relief, cost-effectiveness and environmental impact. Last, Quality of service (QoS) performance is analysed for the four wireless communication systems from the temporary events perspective using the OPNET Modeller simulation tool. Results infer that space-based wireless systems outperform terrestrial ones.

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Bai, Xinyue. "Design of UAV wireless communication system." Journal of Physics: Conference Series 2649, no. 1 (November 1, 2023): 012061. http://dx.doi.org/10.1088/1742-6596/2649/1/012061.

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Abstract The increasing demand for communication has led to a surge in the development and deployment of wireless communication technology in unmanned aerial vehicles (UAVs). As a result, there has been extensive research conducted on UAV wireless communication systems over the past five years. This article provides an overview of the advancements made in three key areas of research: transmission of UAV wireless communication systems, wireless communication networks, and design optimization of UAV wireless communication systems. The article summarizes the existing literature on these topics and highlights the main findings and challenges faced by researchers. In addition, it explores the principles and implementation approaches of three types of UAV wireless communication systems, including a UAV wireless communication system, a UAV wireless transmission system based on the AD9361+ZYNQ7045 platform, and a UAV communication system based on wireless data transmission module. Overall, the research in UAV wireless communication systems has shown great potential for future applications in various fields such as aerial photography, disaster monitoring, and search and rescue operations. By improving the efficiency and reliability of wireless communication between UAVs, the technology can enhance their performance and increase their usefulness in a range of industries.

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Balador, Ali, Anis Kouba, Dajana Cassioli, Fotis Foukalas, Ricardo Severino, Daria Stepanova, Giovanni Agosta, et al. "Wireless Communication Technologies for Safe Cooperative Cyber Physical Systems." Sensors 18, no. 11 (November 21, 2018): 4075. http://dx.doi.org/10.3390/s18114075.

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Cooperative Cyber-Physical Systems (Co-CPSs) can be enabled using wireless communication technologies, which in principle should address reliability and safety challenges. Safety for Co-CPS enabled by wireless communication technologies is a crucial aspect and requires new dedicated design approaches. In this paper, we provide an overview of five Co-CPS use cases, as introduced in our SafeCOP EU project, and analyze their safety design requirements. Next, we provide a comprehensive analysis of the main existing wireless communication technologies giving details about the protocols developed within particular standardization bodies. We also investigate to what extent they address the non-functional requirements in terms of safety, security and real time, in the different application domains of each use case. Finally, we discuss general recommendations about the use of different wireless communication technologies showing their potentials in the selected real-world use cases. The discussion is provided under consideration in the 5G standardization process within 3GPP, whose current efforts are inline to current gaps in wireless communications protocols for Co-CPSs including many future use cases.

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Seymour, Tom, and Ali Shaheen. "History of Wireless Communication." Review of Business Information Systems (RBIS) 15, no. 2 (April 11, 2011): 37–42. http://dx.doi.org/10.19030/rbis.v15i2.4202.

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The history of communication is an exciting topic. This article reviews various areas that makeup the current history of wireless communication. These topics include: the wireless vision, generations of wireless, technical issues, current wireless systems, wireless LaNs, Wide Area Wireless Data Services, Broadband Wireless Access, Satellite Wireless Access, Satellite Networks, and Bluetooth and this material will stimulate you to do more research in these various areas of the wireless industry.

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Bharathi Guvvala. "VLSI Technology: Revolutionizing Modern Communication Systems." International Journal of Scientific Research in Computer Science, Engineering and Information Technology 11, no. 1 (February 10, 2025): 2386–92. https://doi.org/10.32628/cseit251112169.

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This comprehensive article explores the transformative impact of Very Large Scale Integration (VLSI) technology on modern communication systems, examining its evolution, innovations, and future challenges. The article delves into how VLSI has revolutionized communication devices through miniaturization, integration density improvements, and power efficiency optimization. It investigates the crucial role of VLSI in enabling advanced mobile communications, network infrastructure, satellite systems, IoT devices, and next-generation wireless networks. The article analyzes the significant developments in signal processing and protocol implementation, highlighting how VLSI architectures have enabled sophisticated modulation techniques, error correction mechanisms, and real-time processing capabilities. Furthermore, it examines the semiconductor manufacturing ecosystem's evolution and its impact on communication technology advancement. The article also addresses emerging technologies like quantum computing and next-generation wireless networks, discussing technical challenges and potential solutions in VLSI communications. This article demonstrates how VLSI technology continues to be fundamental in shaping the future of communication systems, enabling unprecedented levels of connectivity and processing capabilities.

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Chae, Chan-Byoun, Antonio Forenza, Robert Heath, Matthew McKay, and Iain Collings. "Adaptive MIMO transmission techniques for broadband wireless communication systems [Topics in Wireless Communications." IEEE Communications Magazine 48, no. 5 (May 2010): 112–18. http://dx.doi.org/10.1109/mcom.2010.5458371.

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16

Michalski, Wojciech. "Evolutionary paths in wireless communication systems." Journal of Telecommunications and Information Technology, no. 3 (September 30, 2005): 105–11. http://dx.doi.org/10.26636/jtit.2005.3.318.

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The paper contains a review and analysis of evolutionary paths of seven most important, from network development strategy point of view, wireless communication systems, especially the WLAN operating according to the IEEE 802.11 standard. With respect to WLAN, trends related to evolution toward mobile network and self organizing network as well as toward integration of WLAN and GSM using GPRS are presented. Concerning WLAN architecture development, evolution paths toward distributed controlled network as well as centrally coordinated and controlled network are described. Moreover, analysis includes cellular mobile radio systems, wireless personal networks, wide area wireless packet data systems, satellite-based mobile systems, paging/messaging systems and cordless telephones. With respect to these systems, general evolution process and trends associated with this process are described.

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Han, Daxiao. "An overview of 6G wireless systems." Applied and Computational Engineering 35, no. 1 (January 22, 2024): 50–55. http://dx.doi.org/10.54254/2755-2721/35/20230359.

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With the demand of low latency communication explodes, the inherent limitations of the fifth generation communication is constantly exposed to the public. Such 5G shortcomings are spurring worldwide activities focused on defining the next-generation 6G wireless communication system. So the paper offers an overview of 6G wireless systems based on existing literature and statistical data. The paper concentrate on the driving forces in the development of 6G. In the meanwhile, the paper presents some potential application scenarios in the future. In the last section, the paper points out some challenges that are most likely to encounter in the coming development of 6G. Based on current prospect of 6G, it is likely that 6G features low latency and high efficiency and has 100 times better transmission capacity than 5G. The future applications are holographic telecommunications, mutual interaction of emotional thinking, and digital twinning. In conclusion, integrated with different technologies like AI,Terahertz Communications, and blockchain, 6G features many advantages and will permeate into peoples daily lives.

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Kang, Yoohwa, Sunwoo Lee, Songi Gwak, Taekyeong Kim, and Donghyeok An. "Time-Sensitive Networking Technologies for Industrial Automation in Wireless Communication Systems." Energies 14, no. 15 (July 26, 2021): 4497. http://dx.doi.org/10.3390/en14154497.

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The fourth industrial revolution is accelerating industrial automation. In industrial networks, manufacturing processes require hard real-time communication where the latency is less than 1ms. Time-sensitive networking (TSN) technology over Ethernet already supports deterministic delivery for real-time communication. However, TSN technologies over wireless networks are currently in their initial development stage. Therefore, this study presents an overview of TSN research trends in wireless communications. This paper focuses on 5G networks and IEEE 802.11. We summarize standardization trends for TSN in 5G networks and introduce the TSN technologies for 802.11-based WLAN. Then, we introduce the integration scenario of 5GS with WLAN. This study provides insights into wireless communication technologies for wireless TSN.

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Usmanov, Behzod Shuxratovich, Fotima Abduolim qizi Abdusayidova, and Marjona Shodmon qizi Bebitova. "Methods of connecting to the transmission medium in wireless networks." INTERNATIONAL SCIENTIFIC INNOVATION RESEARCH CONFERENCE 2, no. 3 (April 27, 2025): 14–17. https://doi.org/10.5281/zenodo.15288991.

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This thesis is aimed at forming students' knowledge in the field of modern mobile communication systems, where leading scientific concepts are presented: mobile communication and the principles of its construction, classification of mobile radio systems, mobile generations, LTE system architecture, requirements for the LTE system. functionality and main components of the system architecture. This course is aimed at forming students' understanding of the principles of organizing radio communications, professional radio communication systems, mobile communication standards and generations. In this thesis, you will acquire the skills of organizing mobile communications. Many communication technologies, duplex channel schemes, organization of handover, development of cellular communication systems. 2.5G generation mobile communication systems, 2.75G generation mobile communication systems, 3G third generation standards, 3.9G or 4G generation standards to instill knowledge and skills in the younger generation.

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Briso-Rodríguez, César, Ke Guan, Yin Xuefeng, and Thomas Kürner. "Wireless Communications in Smart Rail Transportation Systems." Wireless Communications and Mobile Computing 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/6802027.

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Railway, subway, airplane, and other transportation systems have drawn an increasing interest on the use of wireless communications for critical and noncritical services to improve performance, reliability, and passengers experience. Smart transportation systems require the use of critical communications for operation and control, and wideband services can be provided using noncritical communications. High speed train (HST) is one of the best test cases for the analysis of communication links and specification of the general requirements for train control and supervision, passenger communications, and onboard and infrastructure wireless sensors. In this paper, we analyze in detail critical and noncritical networks mainly using the HST as a test case. First, the different types of links for smart rail transportation are described, specifying the main requirements of the transportation systems, communications, and their applications for different services. Then, we propose a network architecture and requirements of the communication technologies for critical and noncritical data. Finally, an analysis is made for the future technologies, including the fifth-generation (5G) communications, millimeter wave (mmWave), terahertz (THz), and satellites for critical and high-capacity communications in transportation.

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Akhibi, Samuel D. "Trends in Automotive Communication." International Journal of Network and Communication Research 7, no. 1 (January 15, 2022): 1–13. http://dx.doi.org/10.37745/ijncr.16/vol7n1113.

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Modern vehicles are complex cyber-physical systems where communication protocols designed for physically isolated networks are now employed to connect Internet-enabled devices. This paper presents an overview of wireless automotive communication technologies and the Interference Rejection Combining Approach in Vehicle Communication systems with the aim of identifying the strong candidates for future in-vehicle and inter-vehicle automotive applications. The paper ﬁrst gives an overview of automotive applications relying on wireless communications, with a particular focus on key networking technologies used for in-vehicle and inter-vehicle applications then on Interference Rejection Combining Approach in Vehicle Communication systems.

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Bharathi, Anantha. "SMART ANTENNAS FOR WIRELESS COMMUNICATION SYSTEMS." CVR Journal of Science and Technology 1, no. 1 (October 1, 2011): 37–40. http://dx.doi.org/10.32377/cvrjst0108.

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Shaqfeh, Mohammad Obaidah. "Novel Reduced-Feedback Wireless Communication Systems." Qatar Foundation Annual Research Forum Proceedings, no. 2011 (November 2011): CSP14. http://dx.doi.org/10.5339/qfarf.2011.csp14.

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Juan, Hung-Hui, and Chingyao Huang. "Analytical model for wireless communication systems." IEEE Communications Letters 14, no. 6 (June 2010): 569–71. http://dx.doi.org/10.1109/lcomm.2010.06.090400.

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Saidane, A. "Wireless Communication Technologies: New Multimedia Systems." Microelectronics Journal 32, no. 9 (September 2001): 787–88. http://dx.doi.org/10.1016/s0026-2692(01)00051-9.

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Hara, Shinsuke, Hiroyuki Yomo, Petar Popovski, and Kazunori Hayashi. "New Paradigms in Wireless Communication Systems." Wireless Personal Communications 37, no. 3-4 (May 31, 2006): 233–41. http://dx.doi.org/10.1007/s11277-006-9036-7.

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Trivedi, Kishor S., Xiaomin Ma, and S. Dharmaraja. "Performability modelling of wireless communication systems." International Journal of Communication Systems 16, no. 6 (2003): 561–77. http://dx.doi.org/10.1002/dac.605.

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Daneshgaran, Fred, and Josef Noll. "Special issue: Reconfigurable wireless communication systems." Wireless Communications and Mobile Computing 2, no. 8 (2002): 785–87. http://dx.doi.org/10.1002/wcm.117.

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Zhou, Yangbin. "Inter-symbol Anti-interference Algorithm for 5G Communication System Based on Deep Learning." Highlights in Science, Engineering and Technology 70 (November 15, 2023): 553–61. http://dx.doi.org/10.54097/hset.v70i.13965.

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As a matter of fact, the fifth generation (5G) wireless technology requires huge capacity to ensure normal use of communications, and a large amount of data will cause interference between wireless communication systems. With this in mind, to reduce inter-symbol interference in wireless systems, MIMO-OFDM is employed, the rapid growth of deep learning has the potential to significantly enhance wireless system performance. In reality, applying deep learning to estimate channels in MIMO-OFDM systems can reduce channel errors as well as improve channel quality, thereby greatly reducing inter-code interference between systems. On this basis, this paper introduces various DL-based channel estimation and demonstrates its improvement in the efficiency of the system. According to the analysis, the usage of deep learning in 5G wireless communication systems has great advantages. In addition, the limitations and defects are also discussed at the same time. Overall, these results shed light on guiding further exploration of 5G communication.

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Leccese, Fabio, and Giuseppe Schirripa Spagnolo. "LED-to-LED wireless communication between divers." ACTA IMEKO 10, no. 4 (December 30, 2021): 80. http://dx.doi.org/10.21014/acta_imeko.v10i4.1177.

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<p class="Abstract">For military divers, having a robust, secure, and undetectable wireless communication system available is a fundamental element. Wireless intercoms using acoustic waves are currently used. These systems, even if reliable, have the defect of being easily identifiable and detectable. Visible light can pass through sea water. Therefore, light can be used to develop short-range wireless communication systems. To realize secure close-range underwater wireless communication, the Underwater Optical Wireless Communication (UOWC) can be a valid alternative to acoustic wireless communication. UOWC is not a new idea, but the problem of the presence of sunlight and the possibility of using near-ultraviolet radiation (near-UV) has not been adequately addressed in the literature yet. In military applications, the possibility of using invisible optical radiation can be of great interest. In this paper, a feasibility study is carried out to demonstrate that UOWC can be performed using near-ultraviolet radiation. The proposed system can be useful for wireless voice communications between military divers as well as amateur divers.</p>

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Hadi, Teeb Hussein. "Types of Attacks in Wireless Communication Networks." Webology 19, no. 1 (January 20, 2022): 718–28. http://dx.doi.org/10.14704/web/v19i1/web19051.

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One of the most important types that used to transfer data between nodes without using wires is a “wireless communication network”, where the transmission of data is censored remotely by using electromagnetic waves such as radio waves that usually implemented in the physical layer of the network. Continuous improvements in wireless network technology have reduced the security and speed differences between types of networks (wired and wireless), but in turn, increased security threats to wirelessly transmitted data. Wireless networks are weak in terms of "privacy protection" because anyone who is within the coverage area of a wireless network can attempt to break into that network. Hacking incidents have been reported frequently in places with shared free networks, and it has been observed that the places of open distributed networks of the Internet are most at risk of complete penetration of your phone or PC data. To solve this problem, several programs have been developed that provide protection for wireless networks that differ in terms of security. Some of them did not provide sufficient protection for wireless networks, such as Wired Equivalent Privacy (WEP), and others made progress in preventing intrusions compared to their predecessors, such as Wi-Fi Protected Access (WPA).

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Narakadan, Daryl, Sadhana Pai, and Manita Rajput. "Wireless Communication Between Embedded Systems based on FPGA." International Journal of Engineering & Technology 7, no. 4.41 (December 19, 2018): 66–70. http://dx.doi.org/10.14419/ijet.v7i4.41.24302.

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Nowadays most of the applications require wireless connectivity to seamlessly send and receive information in different networks. In most of the scenarios this was achieved via microcontrollers and RF transceiver modules. The scope of this project is to implement a wireless interface layer between end user device running on different wireless medium using a interconnect model. In this project we use a model that is based on FPGA. Using FPGA rather than microcontroller has its various advantages such as low power consumption, high computation speed and better efficiency. Also for the wireless medium we research on various medium and select the most compatible one. The project will establish communication using UDP packets, which would facilitate wireless transfer of data over robust Wi-Fi technology.Â Â

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Unterhuber, Paul, Stephan Pfletschinger, Stephan Sand, Mohammad Soliman, Thomas Jost, Aitor Arriola, Iñaki Val, et al. "A Survey of Channel Measurements and Models for Current and Future Railway Communication Systems." Mobile Information Systems 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/7308604.

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Modern society demands cheap, more efficient, and safer public transport. These enhancements, especially an increase in efficiency and safety, are accompanied by huge amounts of data traffic that need to be handled by wireless communication systems. Hence, wireless communications inside and outside trains are key technologies to achieve these efficiency and safety goals for railway operators in a cost-efficient manner. This paper briefly describes nowadays used wireless technologies in the railway domain and points out possible directions for future wireless systems. Channel measurements and models for wireless propagation are surveyed and their suitability in railway environments is investigated. Identified gaps are pointed out and solutions to fill those gaps for wireless communication links in railway environments are proposed.

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WITKOWSKI, Marek. "SECURITY OF ICT SYSTEMS IN CRISIS MANAGEMENT." Scientific Journal of the Military University of Land Forces 162, no. 4 (October 1, 2011): 80–90. http://dx.doi.org/10.5604/01.3001.0002.3179.

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The article presents ICT (Information and Communication Technology) networks and systems that are used to provide communications for crisis management purposes. The articles describes wired and wireless communication assets and discusses their advantages and disadvantages when they are used to carry out national security tasks.

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Alexander, Hilario-Tacuri, Soncco Leonel, Donaires Diego, and Borja Juan. "Analytical performance evaluation of GFDM in underwater acoustic communication systems." Revista Facultad de Ingeniería, Universidad de Antioquia, no. 104 (July 28, 2021): 20–32. https://doi.org/10.17533/udea.redin.20210741.

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The rapid growth of the Internet of Things (IoT) has extended its concept to underwater environments. However, the implementation of these systems via wired communication still represents a technological challenge, mainly due to the high cost of their deployment. Therefore, wireless communications are seen as an interesting solution for the deployment of underwater communications systems. Preliminary research indicated that underwater acoustic wireless communication could be used for some Internet of Underwater Things applications, mainly due to the wide range of communications involved. However, a significant disadvantage of acoustic systems is their low transmission data rate; thus, studies and analyses to improve this disadvantage must be carried out. Considering that new waveforms have been proposed to improve the performance of terrestrial wireless communications systems, this work presents the development of general analytical expressions that allow the performance evaluation of the Generalized Frequency Division Multiplexing (GFDM) waveform in underwater environments. These analytical expressions were obtained considering a continuous-time model for the GFDM signal and modeling the underwater acoustic communication channel as a time-varying multipath channel. Numerical results were obtained for many different systems and channel parameters, allowing a quantitative evaluation of the system performance degradation.

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Zhelev, Stefan. "Comparative analysis of the probability in digital wireless communication systems." Journal scientific and applied research 2, no. 1 (March 3, 2012): 21–27. http://dx.doi.org/10.46687/jsar.v2i1.38.

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Digital signals dominate satellite communications systems. A measure the quality of digital signals is Bit Error Rate (BER) and Symbol Error Rate (SER). The main purpose of the paper is a comparison of the probability of error for various modulation and demodulation schemes used in digital communications systems (DCS) for transmitting information over channel. Error Rate parameters are resulting analytically, not experimentally.

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Manda, Rajarao. "A Low-Power, High-Bandwidth Wireless Communication System for Industrial IoT Applications." Mathematical Statistician and Engineering Applications 71, no. 2 (March 6, 2022): 647–57. http://dx.doi.org/10.17762/msea.v71i2.2194.

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In anticipation for an automated future, the Internet of Things (IoT) has rapidly connected more gadgets. Thus, IoT applications' performance requirements present new challenges. Power consumption, service quality, localization, security, and exact wireless channel propagation modelling and characterization are potential issues. When connecting separate sensors wirelessly, the latter is crucial. Channel modelling varies by location because environmental factors affect wireless signal range and quality. Wireless communication technologies are widely used for disaster victim and responder tracking and machine health monitoring in networked manufacturing. Data communication in such systems must be real-time or risk financial losses or human lives. Facilitating real-time medium access via license-free bands in uncontrolled situations is difficult because all communicating stations must be synchronized. (real and nonreal-time). In open communication, medium access protocols cannot filter out unmonitored station traffic.Real-time data collection and analysis improve system efficiency, preventative maintenance, and energy savings. Modulation systems, antenna designs, and power management are just a few of the various ways that must be considered throughout system design and development. IIoT applications also have power, security, and dependability issues. A Low-Power, High-Bandwidth Wireless Communication System for Industrial IoT Applications has a bright future thanks to artificial intelligence and machine learning, 5G networks, new low-power communication technologies, improved security, and blockchain technology. Without this technology, IIoT growth is impossible.

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Li, Yuhua, Lishuang Wan, and Haimin Zhang. "Communication Network for Sports Activity Monitoring Systems." Complexity 2021 (April 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/9971605.

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In this paper, through research and analysis of the communication network of the physical activity monitoring system, we combine wearable technology and identification technology and design a physical health monitoring bracelet that integrates multifaceted physical data collection and effective identity matching function. We match the identity through the chip and collect the physical fitness data generated in the process of exercise and centralized test by the sensor in real-time. Finally, the data transmission is realized through the WIFI communication function to achieve the purpose of monitoring physical exercise and improving physical quality. To ensure the continuity and stability of information transmission, the joint transmission method of direct transmission and indirect transmission is essential. Besides, considering the energy causality limitation of sensor nodes and relay nodes, a collaborative transmission model of wireless body area network based on wireless cognitive network is constructed. And, a power allocation algorithm based on maximum ratio merging and wireless cognitive network is proposed, which puts forward a new idea for the future research of wireless body area network resource allocation.

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Jihad, Noor J., and Murooj A. Abd Almuhsan. "Future trends in optical wireless communications systems: Review." Technium: Romanian Journal of Applied Sciences and Technology 13 (September 15, 2023): 53–67. http://dx.doi.org/10.47577/technium.v13i.9474.

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Optical fibers are frequently used in data transmission systems, Because of their ability to transmit large amounts of information and dielectric nature. In central, metropolitan, or broad-area applications, network topologies incorporating many wavelengths per optical fiber are utilized to connect thousands of users with a wide variety of transmission rates and capacities. The simultaneous transmission of many wavelengths over a fiber with a nm range of 1300 to 1600 is a potent characteristic of an Optical communication network. Wavelength division multiplexing (WDM) is a method for combining various wavelengths onto a single fiber. The WDM concept, when combined with optical amplifiers, produces communication lines that enable quick communication between users across national borders. An overview of the difficulties with fiber-optic communication is provided in this paper. The areas that will be most important for the development of optical communications in the future are outlined in this study. Modern optical fibers and integrated optics were both developed in the dominion of optical machinery and parts. Optical fiber communication systems are widely used for high-speed data transmission over long distances. There are some specific details and examples of optical fiber communication systems such as Fiber Optic Cables, Light Sources, optical modulator, optical amplifier, optical receivers, fiber optical network, medical applications.

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Huang, Yuanyuan, and Chengchu Wu. "Spectrum analysis of multi-pulse position modulation in optical communication." Highlights in Science, Engineering and Technology 53 (June 30, 2023): 78–87. http://dx.doi.org/10.54097/hset.v53i.9685.

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In this paper, the authors aim to compare the performance of space optical communication and wireless optical communication by analyzing the transmission mechanism, transmission method, and transmission rate of MPPM (Multi-Pulse Pulse Position Modulation). MPPM is a widely used modulation technique in optical communication systems, which has the advantage of reducing the effect of noise and improving the system's error rate. To achieve the objective, the authors will employ mathematical models to compare the performance of space optical communication and wireless optical communication. They will analyze the transmission mechanism, transmission method, and transmission rate of MPPM in both communication systems and draw conclusions based on their findings. The authors hope that the results of this study will positively promote the development of MPPM in the future. By comparing the performance of space optical communication and wireless optical communication, this study will provide insights into the strengths and weaknesses of both systems, which can help in the development of more efficient and reliable optical communication systems.

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Belicheva, K. V., R. S. Yonushauskayte, and S. A. Pavlov. "Prospects for visible color for underwater wireless broadband communications." Applied photonics 10, no. 7 (December 28, 2023): 91–116. http://dx.doi.org/10.15593/2411-4375/2023.7.07.

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Nowadays, underwater wireless communications are realized through communication systems based on acoustic waves, electromagnetic waves (radiofrequency waves and low frequency waves), magnetic induction and visible light. This paper provides a basic problems and key aspects in the development of underwater wireless optical communication systems. The latter attracts considerable interest from science, industry and ecology as an effective solution to satisfy the rapidly increasing demands of underwater high data-rate transmission on at any depth. However, severe aquatic channel conditions (absorption, scattering, turbulence, etc.) significantly reduce the attainable communication ranges. The second serious problem limiting the functioning of wireless optical communication systems is the difficulty of aligning the transmitter beam with the receiver's field of view. Two main types between transmitter and receiver are considered: diffuse line-of-sign (wide-beam) configuration and point-to-point light-of-sign (narrow-beam) configuration. Diffuse line-of-sign communication have reduced alignment requirements, but data rates and distances are noticeably lower than in narrow-beam systems. The main technical solutions for adjusting the receiver and transmitter in narrow-beam communication systems are discussed in this paper.

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Zhao, Lili, Peng Zhang, Qicai Dong, Xiangyang Huang, Jianhua Zhao, and Zeyu Su. "Research of the Channel Estimation in Wireless Communication Systems." ITM Web of Conferences 25 (2019): 01002. http://dx.doi.org/10.1051/itmconf/20192501002.

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Wireless communication technology has been developed rapidly after entering the 21st century. Data transfer rate increased significantly as well as the bandwidth became wider and wider from 2G to 4G in wireless communication systems. Channel estimation is an import part of any communication systems; its accuracy determines the quality of the whole communication. Channel estimation methods of typical wireless communication systems such as UWB, 2G and 3G have been researched.

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Gutiérrez, Juan Felipe, and Jesús María Quintero. "Visible Light Communication." Revista Ontare 10 (December 5, 2022): 26. http://dx.doi.org/10.21158/23823399.v10.n1.2022.3538.

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This work presents a general and introductory review of visible light communication. Visible light communication or VLC refers to wireless communications using a spectral range from 380 to 780 nm for the transmission of information. This part of the optical-electromagnetic range presents some advantages to current wireless radio frequency technologies, as well as several challenges to its development and application. Different visible light communication systems have been developed for indoor, outdoor, domestic, and industrial fields where the luminaire performs two tasks: general lighting and data transmission, since this type of communication has important and valuable applications. Recently, research has been performed to improve each functional block’s performance that composes this kind of communication system. The incursion VLC poses challenges such as LED bandwidth limited by the carrier lifetime, the LED-Driver Linearity, it’s up-link; the general lighting infrastructure to the internet; and the dimming and general lighting performance. It is concluded that the incursion of Visible Light Communication into the already extended spectrum of wireless communications systems will complement and make it less harmful to our environment as international regulation has helped to improve this technology substantially.

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Li, Miaoyu, Zhonghao Du, Yutong Liu, and Siying Niu. "Optimization algorithm of communication systems with intelligent reflecting surface for internet of things." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 39, no. 2 (April 2021): 454–61. http://dx.doi.org/10.1051/jnwpu/20213920454.

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With the development of 5th-generation(5G) wireless systems and internet of things(IoT), high speed wireless communications are facing severe challenges due to numerous connections of communication terminals and limited frequency resources. Intelligent reflecting surface(IRS), a newly appeared wireless communication technology, has attracts people's attentions worldwide by its low power consumptions and costs. In order to improve the communication rates of users, this paper proposes a novel optimization algorithm by implementing the deep learning to IRS for establishing the mapping from the channel state information to the optimal reflecting coefficient matrix of IRS. The present algorithm can perform real-time reconfiguration of IRS while protecting the privacy of IoT users.

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Abdourahamane, Ali. "ADVANTAGES OF OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING IN COMMUNICATIONS SYSTEMS." EUREKA: Physics and Engineering 2 (March 31, 2016): 27–33. http://dx.doi.org/10.21303/2461-4262.2016.00058.

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The role of the optical transmitter is to generate the optical signal, impose the information bearing signal, and launch the modulated signal into the optical fiber. The semiconductor light sources are commonly used in state-of-the-art optical communication systems. Optical communication systems has become one of the important systems after the advent of telephone, internet, radio networks in the second half of the 20th century. The development of optical communication was caused primarily by the rapidly rising demand for Internet connectivity. Orthogonal frequency-division multiplexing (OFDM) belongs to a wide class of multicarrier modulation. Orthogonal frequency-division multiplexing has succeeded in a wide range of applications in the wireless communication domain from video/audio digital broadcasting to wireless local area networks (LANs). Although their very low loss compared to that of the wireless counterpart, optical systems still need renovation for spans commonly less than150 Km. In this paper advantages of optical orthogonal frequency division multiplexing in communications systems will explained.

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Belda, Květoslav, Václav Rychnovský, and Pavel Píša. "Wireless communication for control of manipulation systems." Archives of Control Sciences 22, no. 1 (January 1, 2012): 29–41. http://dx.doi.org/10.2478/v10170-011-0010-6.

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Wireless communication for control of manipulation systemsThe paper deals with a novel application of the wireless data communication for a continual control of the distributed manipulation systems. The solution is intended for industrial robotic plants. A considered way of the wireless communication is based on ZigBee protocol. The protocol is tested for a real time bidirectional data communication within a manipulation system. The system consists of several moving manipulation units, several stationary auxiliary units and one control computer. The computer provides the cooperation of all units in the system in relation to the user requirements. The system is controlled by a simple feedback multi-level control realized in MATLAB - Simulink environment. The paper is focused on the realization of the boards of power electronics, transmitters, optical positional sensors, optical gates and their networking in accordance with ZigBee protocol definition. The behavior of the ZigBee is illustrated by several records from real experiments.

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Solyman, Ahmad A. A., and Ismail A. Elhaty. "Potential key challenges for terahertz communication systems." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 4 (August 1, 2021): 3403. http://dx.doi.org/10.11591/ijece.v11i4.pp3403-3409.

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The vision of 6G communications is an improved performance of the data rate and latency limitations and permit ubiquitous connectivity. In addition, 6G communications will adopt a novel strategy. Terahertz (THz) waves will characterize 6G networks, due to 6G will integrate terrestrial wireless mobile communication, geostationary and medium and low orbit satellite communication and short distance direct communication technologies, as well as integrate communication, computing, and navigation. This study discusses the key challenges of THz waves, including path losses which is considered the main challenge; transceiver architectures and THz signal generators; environment of THz with network architecture and 3D communications; finally, Safety and health issues.

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Ahmad, A. A. Solyman. "Potential key challenges for terahertz communication systems." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 4 (August 1, 2021): 3403–9. https://doi.org/10.11591/ijece.v11i4.pp3403-3409.

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The vision of 6G communications is an improved performance of the data rate and latency limitations and permit ubiquitous connectivity. In addition, 6G communications will adopt a novel strategy. Terahertz (THz) waves will characterize 6G networks, due to 6G will integrate terrestrial wireless mobile communication, geostationary and medium and low orbit satellite communication and short distance direct communication technologies, as well as integrate communication, computing, and navigation. This study discusses the key challenges of THz waves, including path losses which is considered the main challenge; transceiver architectures and THz signal generators; environment of THz with network architecture and 3D communications; finally, Safety and health issues.

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Umar, Amjad. "Computer Aided Planning for Wireless Systems." International Journal of Business Data Communications and Networking 8, no. 1 (January 2012): 56–67. http://dx.doi.org/10.4018/jbdcn.2012010104.

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Information and communication technology (ICT) managers in the modern enterprises face a bewildering array of decisions regarding planning of new systems, integration of new systems with existing ones, securing the ICT assets, and administrating the resulting complex ICT systems. The rapid introduction of wireless systems (mobile computing and wireless communications) in the business and government settings is further exasperating the situation, particularly in the developing countries. A Computer Aided Planner (Planner), part of the UN eNabler Toolset, has been developed to quickly and effectively produce detailed strategic plans for a wide range of egovernment services with particular attention to wireless systems. This paper presents a high level overview of this effort.

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SHUKLA, PRATIBHA, and Akhilesh A. Waoo. "Bitter Rate of Performance in Wireless Communications on 5G Technology." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 12 (December 23, 2023): 1–13. http://dx.doi.org/10.55041/ijsrem27705.

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Wireless communications have become an integral part of our modern society, enabling seamless connectivity and data exchange. The bit rate of performance in wireless communication systems plays a crucial role in determining the quality of service and user experience. This abstract provides an overview of key factors influencing bit rate in wireless communications and highlights the challenges and advancements in optimizing performance. The bit rate, often measured in bits per second (bps) or multiples thereof, quantifies the rate at which data can be transmitted over a wireless channel. Several factors impact the bit rate in wireless communications, including the available bandwidth, modulation schemes, signal-to- noise ratio (SNR), and channel conditions. The bit rate is closely related to the achievable data throughput and is a critical metric for assessing the efficiency of wireless networks. Wireless technologies, such as 4G and 5G, have significantly increased the bit rates achievable for mobile communication. These technologies employ advanced modulation techniques and multiple-input, multiple- output (MIMO) systems to enhance spectral efficiency and data rates. Additionally, the deployment of small cells and the use of high-frequency bands have improved data rates and reduced latency in wireless networks. However, challenges persist in optimizing bit rates for wireless communications. Factors like signal interference, fading, and path loss can degrade performance. Moreover, the ever- increasing demand for data-intensive applications and the proliferation of IoT devices put additional pressure on wireless networks to deliver higher bit rates with low latency. To address these challenges, ongoing research focuses on developing advanced signal processing algorithms, beamforming techniques, and error correction mechanisms. Machine learning and artificial intelligence are also being employed to optimize wireless communication systems and enhance bit rates.

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