Bibliografias temáticas / Wireless communication systems

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Literatura científica selecionada sobre o tema "Wireless communication systems"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 30 de julho de 2024

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Artigos de revistas sobre o assunto "Wireless communication systems"

Mistry, Vrushank. "Wireless Communication Technologies in HVAC Control Systems". International Journal of Science and Research (IJSR) 7, n.º 7 (5 de julho de 2018): 1537–43. http://dx.doi.org/10.21275/sr24203192628.

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Prasad, R. "Wireless Broadband Communication Systems". IEEE Communications Magazine 35, n.º 1 (janeiro de 1997): 18. http://dx.doi.org/10.1109/mcom.1997.568189.

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

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Kumar, Nitin. "Investigation and Analysis of the Impact of Interference on Wireless Communication Systems". Mathematical Statistician and Engineering Applications 70, n.º 2 (26 de fevereiro de 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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Kawade, S., e T. Hodgkinson. "Licence-exempt wireless communication systems". BT Technology Journal 25, n.º 2 (abril de 2007): 64–75. http://dx.doi.org/10.1007/s10550-007-0029-1.

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Yang, Qingyan, Virginia Sisiopiku, Jim A. Arnold, Paul Pisano e Gary G. Nelson. "Assessment of Rural Intelligent Transportation System Wireless Communications Solutions". Transportation Research Record: Journal of the Transportation Research Board 1739, n.º 1 (janeiro de 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 e Aleš Švigelj. "Radio Technologies for Environment-Aware Wireless Communications". WSEAS TRANSACTIONS ON COMMUNICATIONS 21 (31 de dezembro de 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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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, n.º 11 (21 de novembro de 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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Michalski, Wojciech. "Evolutionary paths in wireless communication systems". Journal of Telecommunications and Information Technology, n.º 3 (30 de setembro de 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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Bai, Xinyue. "Design of UAV wireless communication system". Journal of Physics: Conference Series 2649, n.º 1 (1 de novembro de 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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Teses / dissertações sobre o assunto "Wireless communication systems"

Kodikara, Patabandi C. K. "Multimedia communications over 3G wireless communication systems". Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/844270/.

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This thesis addresses the transmission of video over third generation radio access networks. The first part of the thesis investigates the capabilities of Universal Terrestrial Radio Access Networks (UTRAN) in terms of the provision of multimedia communications. The error performance and traffic requirements of real-time video transmission over circuit switched and packet switched connections are examined. The effect of network parameter settings upon video performances is evaluated, and optimum radio bearer configurations for the transmission of video are derived. A method of estimating received video quality after transmission over error prone environments is developed. The quality estimation is based on a distortion model, which accurately models the overall distortion seen in decoder frame reconstruction. This includes quantisation distortion, concealment distortion, and error propagation. Based on the developed performance model, optimum MTU (Maximum Transfer Unit) size for efficient wireless video communications over a packet switched access network is derived. The second part of the thesis investigates quality enhancement techniques for multimedia traffic transmitted over wireless channels. Quality enhancement is achieved at three levels of the transmission process: link level, application level and system level. Link level quality enhancement techniques are designed to optimise the allocation of link level parameter values according to the media characteristics. A novel Unequal Error Protection scheme and a novel Unequal Power Allocation scheme are designed to exploit the inherent diversity in the subjective importance of different sections of compressed media. The algorithms are developed and analysed for transmission of video over 3G wireless systems. The effectiveness of these algorithms is demonstrated through the results of simulated transmission over a UMTS channel. Application level quality enhancement techniques are designed to explore the time-varying nature of the wireless channel. A number of link adaptation schemes are proposed for real time video communication and real-time video streaming over 3G wireless systems. These algorithms are designed to enhance the perceptual video quality, and the system utilisation. This is achieved by adapting the allocated radio network parameters and the source parameters, according to a feedback channel condition. Simulation results show a significant performance improvement compared to non-adaptive schemes. Finally, system level adaptation techniques are designed for efficient radio resource allocation in multi-user scenarios. Two adaptive resource allocation schemes are proposed and analysed for real-time video communications in a UMTS system. The proposed algorithms are shown to provide improved performances in terms of average received video quality and user satisfaction. Key words: Wireless Communication, Multimedia communication. Video Transmission.

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Jiang, Junyi. "Optical wireless communication systems". Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/387239/.

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In recent years, Optical Wireless (OW) communication techniques have attracted substantial attention as a benefit of their abundant spectral resources in the optical domain, which is a potential solution for satisfying the ever-increasing demand for increased wireless capacity in the conventional Radio Frequency (RF) band. Motivated by the emerging techniques and applications of OW communication, the Institute of Electrical and Electronics Engineers (IEEE) had released the IEEE standard 802.15.7 for short-range optical wireless communications, which categorised the Physical layer (PHY) of the OW communication into three candidate-solutions according to their advantages in different applications and environments: 1) Physical-layer I (PHY I): Free Space Optical (FSO)communication employs high-intensity Light Emitting Diodes (LEDs) or Laser Diodes (LDs) as its transmitter. 2) Physical-layer II (PHY II) uses cost-effective, low-power directional white LEDs for the dual function of illumination and communication. 3) Physical III (PHY-III) relies on the so-called Colour-Shift Keying (CSK) modulation scheme for supporting high-rate communication. Our investigations can be classified into three major categories, namely Optical Orthogonal Frequency Division Multiplexing (OFDM) based Multiple-Input Multiple-Output (MIMO) techniques for FSO communications in the context of PHY I, video streaming in PHY-II and the analysis and design of CSK for PHY-III. To be more explicit, in Chapter 2 we first construct a novel ACO-OFDM based MIMO system and investigate its performance under various FSO turbulence channel conditions. However, MIMO systems require multiple optical chains, hence their power consumption and hardware costs become substantial. Hence, we introduced the concept of Aperture Selection (ApS) to mitigate these problems with the aid of a simple yet efficient ApS algorithm for assisting our ACO-OFDM based MIMO system. Since the channel conditions of indoor Visible Light Communication (VLC) environments are more benign than the FSO-channels of Chapter 2, directional white LEDs are used to create an “attocell” in Chapter 3. More specifically, we investigate video streaming in a multi-Mobile Terminals (MTs) indoor VLC system relying on Unity Frequency Reuse (UFR) as well as on Higher Frequency Reuse Factor based Transmission (HFRFT) and on Vectored Transmission (VT) schemes. We minimise the distortion of video streaming, while satisfying the rate constraints as well as optical constraints of all the MTs. In Chapter 4 we analyse the performance of CSK relying both on joint Maximum Likelihood (ML) Hard-Detection (HD), as well as on the the Maximum A posteriori (MAP) criterion-based Soft-Detection (SD) of CSK. Finally, we conceive both two- stage and three-stage concatenated iterative receivers capable of achieving a substantial iteration gain, leading to a vanishingly low BER.

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Alhartomi, Mohammed. "Collaborative optical wireless communication systems". Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/13153/.

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Toni, Laura <1982&gt. "Adaptive wireless multimedia communication systems". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/2117/1/Laura_Toni_tesi.pdf.

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In recent years, due to the rapid convergence of multimedia services, Internet and wireless communications, there has been a growing trend of heterogeneity (in terms of channel bandwidths, mobility levels of terminals, end-user quality-of-service (QoS) requirements) for emerging integrated wired/wireless networks. Moreover, in nowadays systems, a multitude of users coexists within the same network, each of them with his own QoS requirement and bandwidth availability. In this framework, embedded source coding allowing partial decoding at various resolution is an appealing technique for multimedia transmissions. This dissertation includes my PhD research, mainly devoted to the study of embedded multimedia bitstreams in heterogenous networks, developed at the University of Bologna, advised by Prof. O. Andrisano and Prof. A. Conti, and at the University of California, San Diego (UCSD), where I spent eighteen months as a visiting scholar, advised by Prof. L. B. Milstein and Prof. P. C. Cosman. In order to improve the multimedia transmission quality over wireless channels, joint source and channel coding optimization is investigated in a 2D time-frequency resource block for an OFDM system. We show that knowing the order of diversity in time and/or frequency domain can assist image (video) coding in selecting optimal channel code rates (source and channel code rates). Then, adaptive modulation techniques, aimed at maximizing the spectral efficiency, are investigated as another possible solution for improving multimedia transmissions. For both slow and fast adaptive modulations, the effects of imperfect channel estimation errors are evaluated, showing that the fast technique, optimal in ideal systems, might be outperformed by the slow adaptive modulation, when a real test case is considered. Finally, the effects of co-channel interference and approximated bit error probability (BEP) are evaluated in adaptive modulation techniques, providing new decision regions concepts, and showing how the widely used BEP approximations lead to a substantial loss in the overall performance.

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Toni, Laura <1982&gt. "Adaptive wireless multimedia communication systems". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/2117/.

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Yamashita, Shota. "Coexistence of Wireless Communication and Non-communication Systems". Kyoto University, 2018. http://hdl.handle.net/2433/232420.

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Lukama, L. "Diversity systems for future wideband wireless communication systems". Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249495.

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Nordberg, Jörgen. "Signal enhancement in wireless communication systems /". Ronneby : Department of Telecommunications and Signal Processing, Blekinge Institute of Technology, 2002. http://www.bth.se/fou.

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Sepasian, Mojtaba. "Multibiometric security in wireless communication systems". Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/5081.

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This thesis has aimed to explore an application of Multibiometrics to secured wireless communications. The medium of study for this purpose included Wi-Fi, 3G, and WiMAX, over which simulations and experimental studies were carried out to assess the performance. In specific, restriction of access to authorized users only is provided by a technique referred to hereafter as multibiometric cryptosystem. In brief, the system is built upon a complete challenge/response methodology in order to obtain a high level of security on the basis of user identification by fingerprint and further confirmation by verification of the user through text-dependent speaker recognition. First is the enrolment phase by which the database of watermarked fingerprints with memorable texts along with the voice features, based on the same texts, is created by sending them to the server through wireless channel. Later is the verification stage at which claimed users, ones who claim are genuine, are verified against the database, and it consists of five steps. Initially faced by the identification level, one is asked to first present one’s fingerprint and a memorable word, former is watermarked into latter, in order for system to authenticate the fingerprint and verify the validity of it by retrieving the challenge for accepted user. The following three steps then involve speaker recognition including the user responding to the challenge by text-dependent voice, server authenticating the response, and finally server accepting/rejecting the user. In order to implement fingerprint watermarking, i.e. incorporating the memorable word as a watermark message into the fingerprint image, an algorithm of five steps has been developed. The first three novel steps having to do with the fingerprint image enhancement (CLAHE with 'Clip Limit', standard deviation analysis and sliding neighborhood) have been followed with further two steps for embedding, and extracting the watermark into the enhanced fingerprint image utilising Discrete Wavelet Transform (DWT). In the speaker recognition stage, the limitations of this technique in wireless communication have been addressed by sending voice feature (cepstral coefficients) instead of raw sample. This scheme is to reap the advantages of reducing the transmission time and dependency of the data on communication channel, together with no loss of packet. Finally, the obtained results have verified the claims.

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Parand, Farivar. "Cellular optical wireless communications systems". Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270654.

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Livros sobre o assunto "Wireless communication systems"

S, Swamy M. N., ed. Wireless communication systems. Cambridge: Cambridge University Press, 2010.

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Du, K. L. Wireless communication systems. Cambridge: Cambridge University Press, 2010.

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Cavalcanti, Francisco Rodrigo Porto, e Sören Andersson, eds. Optimizing Wireless Communication Systems. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0155-2.

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Roy, Blake, ed. Wireless communication technology. Albany, NY: Delmar, 2000.

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Barbarossa, Sergio. Multiantenna wireless communications systems. Boston, MA: Artech House, 2005.

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Arnon, Shlomi, John Barry, George Karagiannidis, Robert Schober e Murat Uysal, eds. Advanced Optical Wireless Communication Systems. Cambridge: Cambridge University Press, 2009. http://dx.doi.org/10.1017/cbo9780511979187.

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Yichuang, Sun, e Institution of Electrical Engineers, eds. Wireless communication circuits and systems. London: Institution of Electrical Engineers, 2004.

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Koivo, Heikki. Systems engineering in wireless communication. Hoboken, NJ: John Wiley & Sons, 2009.

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Yichuang, Sun, e Institution of Electrical Engineers, eds. Wireless communication circuits and systems. London: Institution of Electrical Engineers, 2003.

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Koivo, Heikki. Systems engineering in wireless communication. Hoboken, NJ: John Wiley & Sons, 2009.

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Capítulos de livros sobre o assunto "Wireless communication systems"

Bird, Neil C. "Wireless Communication Systems". In Philips Research, 85–104. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4198-5_6.

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Sheikh, Asrar U. H. "3G Wireless Communication Systems". In Wireless Communications, 643–704. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-1-4419-9152-2_13.

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Dhatterwal, Jagjit Singh, Kuldeep Singh Kaswan e Kiran Malik. "Revolutionizing Wireless Systems". In Wireless Communication Technologies, 142–79. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003389231-8.

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Walke, Bernhard H., Lars Berlemann, Guido Hiertz, Christian Hoymann, Ingo Forkel e Stefan Mangold. "Wireless Communication - Basics". In IEEE 802 Wireless Systems, 7–41. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/9780470058800.ch2.

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Mohamed, Khaled Salah. "Wireless Communication Systems: Standards". In Wireless Communications Systems Architecture, 133–42. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-19297-5_6.

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Mohamed, Khaled Salah. "Wireless Communication Systems: Foundation". In Wireless Communications Systems Architecture, 1–26. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-19297-5_1.

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Mohamed, Khaled Salah. "Wireless Communication Systems: Confidentiality". In Wireless Communications Systems Architecture, 55–67. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-19297-5_3.

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Mohamed, Khaled Salah. "Wireless Communication Systems: Reliability". In Wireless Communications Systems Architecture, 69–99. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-19297-5_4.

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Srivastava, Akanksha, e Gurjit Kaur. "Green Wireless Communication Systems". In Green Communication Technologies for Future Networks, 17–34. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003264477-2.

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Kempf, Torsten, Gerd Ascheid e Rainer Leupers. "Systems for Wireless Communication". In Multiprocessor Systems on Chip, 7–22. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-8153-0_2.

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Trabalhos de conferências sobre o assunto "Wireless communication systems"

Vinnikov, A. A. "Multi-antenna systems for wireless communications". In Modern Problems of Telecommunications - 2024. Siberian State University of Telecommunications and Information Systems, 2024. http://dx.doi.org/10.55648/spt-2024-1-237.

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The article discusses multi-antenna systems for wireless communications (MIMO), which play a key role in modern data transmission technologies. These systems use multiple antennas to simultaneously transmit and receive data, increasing communication capacity and reliability

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Mikołajczyk, Janusz, Robert Matyszkiel, Dariusz Szabra, Artur Prokopiuk, Bogusław Grochowina e Zbigniew Bielecki. "Hybrid wireless communication link". In Radioelectronic Systems Conference 2019, editado por Piotr Kaniewski e Jan Matuszewski. SPIE, 2020. http://dx.doi.org/10.1117/12.2565289.

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Madhag, Aqeel, e Jongeun Choi. "Distributed Navigation Strategy of Mobile Sensor Networks With Probabilistic Wireless Communication Links". In ASME 2015 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/dscc2015-9964.

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Mobile sensor networks have been widely used to predict spatio-temporal physical phenomena for various scientific and engineering applications. To accommodate the realistic models of mobile sensor networks, we incorporated probabilistic wireless communication links based on packet reception ratio (PRR) with distributed navigation. We then derived models of mobile sensor networks that predict Gaussian random fields from noise-corrupted observations under probabilistic wireless communication links. For the given model with probabilistic wireless communication links, we derived the prediction error variances for further sampling locations. Moreover, we designed a distributed navigation that minimizes the network cost function formulated in terms of the derived prediction error variances. Further, we have shown that the solution of distributed navigation with the probabilistic wireless communication links for mobile sensor networks are uniformly ultimately bounded with respect to that of the distributed one with the R-disk communication model. According to Monte Carlo simulation results, agent trajectories under distributed navigation with the probabilistic wireless communication links are similar to those with the R-disk communication model, which confirming the theoretical analysis.

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"Session - Wireless Communication". In 2004 IEEE International Workshop on Factory Communication Systems. Proceedings. IEEE, 2004. http://dx.doi.org/10.1109/wfcs.2004.1377678.

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"Keynote - Wireless Communication: WLANs as Part of Future Wireless Communication Systems". In 2004 IEEE International Workshop on Factory Communication Systems. Proceedings. IEEE, 2004. http://dx.doi.org/10.1109/wfcs.2004.1377676.

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Holtzman, J. M. "Modeling of wireless communication systems". In Fifth IEEE International Workshop on Computer-Aided Modeling, Analysis, and Design of Communication Links and Networks. IEEE, 1994. http://dx.doi.org/10.1109/camad.1994.765633.

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Li, Chuan, David Hutchins e Roger Green. "Ultrasonic wireless digital communication systems". In International Congress on Ultrasonics. Vienna University of Technology, 2007. http://dx.doi.org/10.3728/icultrasonics.2007.vienna.1344_li.

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Rohde, Ulrich L., e Ajay K. Poddar. "RCO For Wireless Communication Systems". In 2007 International Symposium on Signals, Systems and Electronics. IEEE, 2007. http://dx.doi.org/10.1109/issse.2007.4294526.

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Bidwai, Akshay, Abhiyash Hodge e Hrishikesh Humnabakar. "Underwater Wireless Communication and Systems". In 2018 3rd International Conference for Convergence in Technology (I2CT). IEEE, 2018. http://dx.doi.org/10.1109/i2ct.2018.8529698.

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Shen, Thomas C., Robert J. Drost, John Rzasa, Brian M. Sadler e Christopher C. Davis. "Panoramic alignment system for optical wireless communication systems". In SPIE LASE, editado por Hamid Hemmati e Don M. Boroson. SPIE, 2015. http://dx.doi.org/10.1117/12.2080091.

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Relatórios de organizações sobre o assunto "Wireless communication systems"

Li, Xiao. Nonlinearity Analysis and Predistortion of 4G Wireless Communication Systems. Portland State University Library, janeiro de 2000. http://dx.doi.org/10.15760/etd.992.

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Kong, Zhihao, e Na Lu. Determining Optimal Traffic Opening Time Through Concrete Strength Monitoring: Wireless Sensing. Purdue University, 2023. http://dx.doi.org/10.5703/1288284317613.

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Construction and concrete production are time-sensitive and fast-paced; as such, it is crucial to monitor the in-place strength development of concrete structures in real-time. Existing concrete strength testing methods, such as the traditional hydraulic compression method specified by ASTM C 39 and the maturity method specified by ASTM C 1074, are labor-intensive, time consuming, and difficult to implement in the field. INDOT’s previous research (SPR-4210) on the electromechanical impedance (EMI) technique has established its feasibility for monitoring in-situ concrete strength to determine the optimal traffic opening time. However, limitations of the data acquisition and communication systems have significantly hindered the technology’s adoption for practical applications. Furthermore, the packaging of piezoelectric sensor needs to be improved to enable robust performance and better signal quality. In this project, a wireless concrete sensor with a data transmission system was developed. It was comprised of an innovated EMI sensor and miniaturized datalogger with both wireless transmission and USB module. A cloud-based platform for data storage and computation was established, which provides the real time data visualization access to general users and data access to machine learning and data mining developers. Furthermore, field implementations were performed to prove the functionality of the innovated EMI sensor and wireless sensing system for real-time and in-place concrete strength monitoring. This project will benefit the DOTs in areas like construction, operation, and maintenance scheduling and asset management by delivering applicable concrete strength monitoring solutions.

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Akyol, Bora A., Harold Kirkham, Samuel L. Clements e Mark D. Hadley. A Survey of Wireless Communications for the Electric Power System. Office of Scientific and Technical Information (OSTI), janeiro de 2010. http://dx.doi.org/10.2172/986700.

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Modlo, Yevhenii O., Serhiy O. Semerikov, Stanislav L. Bondarevskyi, Stanislav T. Tolmachev, Oksana M. Markova e Pavlo P. Nechypurenko. Methods of using mobile Internet devices in the formation of the general scientific component of bachelor in electromechanics competency in modeling of technical objects. [б. в.], fevereiro de 2020. http://dx.doi.org/10.31812/123456789/3677.

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An analysis of the experience of professional training bachelors of electromechanics in Ukraine and abroad made it possible to determine that one of the leading trends in its modernization is the synergistic integration of various engineering branches (mechanical, electrical, electronic engineering and automation) in mechatronics for the purpose of design, manufacture, operation and maintenance electromechanical equipment. Teaching mechatronics provides for the meaningful integration of various disciplines of professional and practical training bachelors of electromechanics based on the concept of modeling and technological integration of various organizational forms and teaching methods based on the concept of mobility. Within this approach, the leading learning tools of bachelors of electromechanics are mobile Internet devices (MID) – a multimedia mobile devices that provide wireless access to information and communication Internet services for collecting, organizing, storing, processing, transmitting, presenting all kinds of messages and data. The authors reveals the main possibilities of using MID in learning to ensure equal access to education, personalized learning, instant feedback and evaluating learning outcomes, mobile learning, productive use of time spent in classrooms, creating mobile learning communities, support situated learning, development of continuous seamless learning, ensuring the gap between formal and informal learning, minimize educational disruption in conflict and disaster areas, assist learners with disabilities, improve the quality of the communication and the management of institution, and maximize the cost-efficiency. Bachelor of electromechanics competency in modeling of technical objects is a personal and vocational ability, which includes a system of knowledge, skills, experience in learning and research activities on modeling mechatronic systems and a positive value attitude towards it; bachelor of electromechanics should be ready and able to use methods and software/hardware modeling tools for processes analyzes, systems synthesis, evaluating their reliability and effectiveness for solving practical problems in professional field. The competency structure of the bachelor of electromechanics in the modeling of technical objects is reflected in three groups of competencies: general scientific, general professional and specialized professional. The implementation of the technique of using MID in learning bachelors of electromechanics in modeling of technical objects is the appropriate methodic of using, the component of which is partial methods for using MID in the formation of the general scientific component of the bachelor of electromechanics competency in modeling of technical objects, are disclosed by example academic disciplines “Higher mathematics”, “Computers and programming”, “Engineering mechanics”, “Electrical machines”. The leading tools of formation of the general scientific component of bachelor in electromechanics competency in modeling of technical objects are augmented reality mobile tools (to visualize the objects’ structure and modeling results), mobile computer mathematical systems (universal tools used at all stages of modeling learning), cloud based spreadsheets (as modeling tools) and text editors (to make the program description of model), mobile computer-aided design systems (to create and view the physical properties of models of technical objects) and mobile communication tools (to organize a joint activity in modeling).

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Esener, Sadik. Optical Interconnects for Smart Antenna Driver-Receiver-Switch System for Wireless Communication. Fort Belvoir, VA: Defense Technical Information Center, dezembro de 2002. http://dx.doi.org/10.21236/ada412178.

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Zvi H. Meiksin. DEVELOPMENT OF A COMPREHENSIVE WIRELESS COMMUNICATIONS SYSTEM FOR THE UNDERGROUND MINING INDUSTRY. Office of Scientific and Technical Information (OSTI), abril de 2001. http://dx.doi.org/10.2172/815212.

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León, Carlos. Digital Operational Resilience Act (DORA). FNA, julho de 2023. http://dx.doi.org/10.69701/deff9232.

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One of the key lessons of the 2007-2008 global financial crisis is the importance of financial market infrastructures (FMIs) as a pillar of financial stability. Before, the role of financial market infrastructures, namely the provision of trading, clearing, settling, recording, and compressing services for transactions between financial institutions (FIs) was often taken for granted. This was reflected in FMIs having often been referred to as the financial system’s plumbing, including by the Federal Reserve’s 14th chairman (Bernanke, 2011)—a clear reference to the critical yet concealed importance of FMIs in the safe and efficient functioning of financial markets. Today, it is clear that the failure of an important FMI will almost certainly lead to systemic instability in financial markets. Given this, it is evident that FMIs are critical infrastructures; that is, based on a definition by the European Commission (2008), FMIs can be considered systems that are essential for the maintenance of vital societal functions, health, safety, security, economic or social well-being of people. In light of this importance, it’s perhaps surprising that the literature about financial networks has addressed the importance of FMIs rather recently and sparingly. The archetypical financial network, composed of FIs as elements (the nodes) that are interlinked through different types of relations (e.g., exposures, payments, ownership, common holdings), has been complemented by the introduction of FMIs as an additional layer that provides a medium for FIs to interact. As highlighted in Berndsen, et al. (2018), a network of FIs that does not include FMIs is a logical network—one that displays bilateral relations despite those requiring the intervention of an FMI to exist. And that’s why the plumbing reference is particularly illustrative: when looking at the floor plan of a house, the plumbing is a critical additional layer hidden beneath the first—immediately visible—layer; in a building, carelessly knocking down a wall could have a disastrous effect on the supply of water, electricity, gas, communications within the apartment and even to others above and below–not to mention the effect on the structural integrity of the building. However, there are further layers beneath those containing FIs and FMIs. In fact, a financial network composed of FIs and FMIs is still a logical network, as the connections between FIs and FMIs also require the intervention of other elements to exist. Those elements provide the physical connection that enables the interlinkages among FIs and FMIs, in the form of wired (e.g., cable) or wireless (e.g., radio waves) connections. That is, as stated by Berndsen, et al. (2018), the interdependence of financial markets with physical networks, such as power and communication networks, make those networks critical infrastructures and obvious candidates for examining the stability of financial systems from an operational perspective.

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Graham, Scott R., Sumant Kowshik, Girish Baliga, Lui Sha e Marco Caccamo. Co-Design of Real-Time Communication and Control in a Wireless Networked Control System. Fort Belvoir, VA: Defense Technical Information Center, julho de 2004. http://dx.doi.org/10.21236/ada425008.

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Tzonev, Nick. PR-396-183905-R01 Autonomous System For Monitoring Pipeline River Crossings. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), junho de 2021. http://dx.doi.org/10.55274/r0012110.

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The goal of the GHZ-2-01 Project is to develop and lab-test a system for monitoring underground pipeline facilities at remote river crossings where access to power and wireline communications is not readily available. A next generation real-time river crossing monitoring solution requires an integration of various sensor types, data computation capabilities, and low power wireless connectivity which would: - utilize proven sensors technologies such as accelerometers, inclinometer strings and float-out buoys to detect dangerous conditions, - be able to recognize and minimize false alarms by examining a combination of sensors, - alarm on contact with hydrocarbons, - require minimal maintenance, - be easily scalable, both geographically and as a network, - provide seamless integration into Supervisory Control and Acquisition (SCADA) systems, and - be economical. There is a related webinar.

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Twogood, Richard E., e Faranak Nekoogar. SBIR Phase II Final Report - A Robust Wireless Communication System for Harsh Environments Including Nuclear Facilities. Office of Scientific and Technical Information (OSTI), outubro de 2019. http://dx.doi.org/10.2172/1572220.

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