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Thematische Bibliographien / Wireless Radio Channel / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Wireless Radio Channel“

Autor: Grafiati

Veröffentlicht am 23. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

D., Jasmine David, Jegathesan V., and Jemima Jebaseeli T. "Distributed optimal congestion control and channel assignment in wireless mesh networks." TELKOMNIKA Telecommunication, Computing, Electronics and Control 19, no. 2 (2021): pp. 414~420. https://doi.org/10.12928/TELKOMNIKA.v19i2.16135.

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Wireless mesh networks have numerous advantages in terms of connectivity as well as reliability. Traditionally the nodes in wireless mesh networks are equipped with single radio, but the limitations are lower throughput and limited use of the available wireless channel. In order to overcome this, the recent advances in wireless mesh networks are based on multi-channel multi radio approach. Channel assignment is a technique that selects the best channel for a node or to the entire network just to increase the network capacity. To maximize the throughput and the capacity of the network, multiple

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Dai, Yuan-Kao, Li-Hsing Yen, and Jia-Wei Su. "Toward an Access Infrastructure for Mobile Cloud." International Journal of Grid and High Performance Computing 5, no. 3 (2013): 6–19. http://dx.doi.org/10.4018/jghpc.2013070102.

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The provision of mobile cloud service calls for a wireless access infrastructure that offers high bandwidth to mobile users. Among all enabling technologies, wireless mesh networks (WMNs) have the advantage of low deployment cost and widely available user equipments. To provide more bandwidth, access points in WMNs are commonly equipped with multiple wireless interfaces (radios) that can operate on multiple non-overlapping channels in parallel. The objective of channel assignments in a multi-channel, multi-radio MWN is to reduce co-channel interference experienced by links so as to increase ne

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Yevseiev, Serhii, Stanislav Milevskyi, Vladyslav Sokol, et al. "Development of functionality principles for the automated data transmission system through wireless communication channels to ensure information protection." Eastern-European Journal of Enterprise Technologies 4, no. 9 (130) (2024): 18–33. http://dx.doi.org/10.15587/1729-4061.2024.310547.

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The development of data transmission systems based on wireless radio communication channels allowed the construction of fundamentally new networks – mesh networks, which are used not only in smart technologies, but are the basis for the construction of cyber-physical and socio-cyber-physical systems (objects of critical infrastructure). The object is the process of ensuring reliable and secure data transmission based on the use of wireless radio communication channels. A mathematical model of information resources protection system functioning is proposed to ensure the signs of immunity and se

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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 poten

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Billal, Miah, Mohiuddin Nazmul Md., Shaima Shumaiya, and Mohammod Abul Kashem Dr. "An Efficient Neighbor Discovery Approach using HTTA Sequence Based Channel Rendezvous in CRN." International Journal of Innovative Science and Research Technology 8, no. 3 (2023): 20–30. https://doi.org/10.5281/zenodo.7716678.

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Cognitive Radio Network (CRN) is an intelligent radio that can be programmed and configured dynamically, Cognitive radio (CR) is a new emerging and challenging research area to improve spectral efficiency of wireless communication. A cognitive radio wireless sensor network is one of the postulant areas where cognitive techniques can be used for opportunistic spectrum access. Cognitive radio is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied

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Ning, Zhao Long, Yu Huai Peng, and Lei Guo. "Performance Comparison for Routing Protocols in Multi-Radio Multi-Channel Multi-Hop Wireless Networks." Advanced Materials Research 433-440 (January 2012): 5107–12. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.5107.

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In this paper, we consider a TDMA-based wireless network and address two major issues, fading and interference, existing in wireless networks since fading will lead to low quality links and interference may lead to unfair channel allocation. Because channel allocation selects the proper channel for each logical link and routing determines through which logical links the packets should be forwarded, there is strong interaction between MAC layer and network layer. In this paper, we seek for the performance trend with more channels allocated and further compare the performances of Bellman-Ford an

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Mi, Hang, Bo Ai, Ruisi He, et al. "Multi-Scenario Millimeter Wave Channel Measurements and Characteristic Analysis in Smart Warehouse at 28 GHz." Electronics 12, no. 15 (2023): 3373. http://dx.doi.org/10.3390/electronics12153373.

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Smart warehouses are revolutionizing traditional logistics operations by incorporating advanced technologies such as Internet of Things, robotics, and artificial intelligence. In these complex and dynamic environments, control and operation instructions need to be transmitted through wireless networks. Therefore, wireless communication plays a crucial role in enabling efficient and reliable operations. Meanwhile, channel measurements and modeling in smart warehouse scenarios are essential for understanding and optimizing wireless communication performance. By accurately characterizing radio ch

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A. Rida, Jafaar Fahad. "Improvement for performance radio frequency in wireless communication based on impulse signal." Indonesian Journal of Electrical Engineering and Computer Science 18, no. 2 (2020): 903. http://dx.doi.org/10.11591/ijeecs.v18.i2.pp903-916.

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<p><span>This research presents the improved performance of mobile wireless communication channel is based on non-line of sight because the mobile propagation channel is very hard to work with direct path between the transmitter and mobile receiver because of city-based area has objects such as rise building, trees, surround structures, and other objects. The mobile wireless spread radio channels have radio propagation mechanisms as a reflection, diffraction, and scattering effect on radio signal as lessening, </span>and distortion or spread time. The most important thing to

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Jafaar, Fahad A. Rida. "Improvement for performance radio frequency in wireless communication based on impulse signal." Indonesian Journal of Electrical Engineering and Computer Science (IJEECS) 18, no. 2 (2020): 903–16. https://doi.org/10.11591/ijeecs.v18.i2.pp903-916.

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This research presents the improved performance of mobile wireless communication channel is based on non-line of sight because the mobile propagation channel is very hard to work with direct path between the transmitter and mobile receiver because of city-based area has objects such as rise building, trees, surround structures, and other objects. The mobile wireless spread radio channels have radio propagation mechanisms as a reflection, diffraction, and scattering effect on radio signal as lessening, and distortion or spread time. The most important thing to make real is that the wireless cha

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Vinod, Kimbahune. "AUTONOMOUSLY-RECONFIGURABLE WIRELESS MESH NETWORKS." IJIERT - International Journal of Innovations in Engineering Research and Technology 3, no. 6 (2016): 16–20. https://doi.org/10.5281/zenodo.1463672.

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<strong>Multi - hop wireless mesh network experience link - failure due to channel interference,dynamic obstacles etc. which causes performance degradation of the network in Wireless Mesh Networks. The paper proposes �Autonomously Reconfigurable Wireless Mesh Networks system based upon IEEE 802.11� form r - WMN to recover autonomously in case the network failure occurs,to improve the network performance. The paper presents an autonomously network reconfiguration system (ARS) that allows amultiradio WMN to self - recover from local link failure to maintain network performance. By using channels

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Skvarnik, I. S., A. A. Shmakov, A. N. Shentyabin, and I. V. Minin. "AUTOMATIC DEVICE FOR REAL–TIME SWITCHING TO RESERVE RADIO CHANNEL." Issues of radio electronics, no. 5 (June 8, 2019): 39–47. http://dx.doi.org/10.21778/2218-5453-2019-5-39-47.

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Guaranteed delivery of information via communication channels remains an urgent task for a number of industries. However, automatic transition to the reserve for analog communication channels requires non‑standard solutions. In the proposed device, the decision on switching to the reserve is made on the basis of spectral analysis of signals transmitted via the main and backup communication channels. A wired communication channel is considered as the main channel, and a wireless broadband access channel is used as a backup channel. The signal transmitted over the wireless broadband access is ta

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Kim, Tae-Sung, Sok-Hyong Kim, Bo-Kyum Kim, and Young-Yong Kim. "Exploiting Multiple Channels for Low Latency and Semireliable Broadcasting in Cognitive Wireless Sensor Networks." International Journal of Distributed Sensor Networks 2015 (2015): 1–16. http://dx.doi.org/10.1155/2015/241208.

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In Wireless Sensor Networks (WSNs), disaster management is a crucial issue that focuses on disaster relief and recovery. Mobile sensor nodes support disaster relief and recovery by means of real-time bidirectional communication. For its high data rate requirement, IEEE 802.11 specification can be used for the radio interface of sensor nodes, and the nodes can be equipped with multiple 802.11 radios to utilize multiple channels and link data rates. Channel assignment algorithms can be applied in cognitive radio enabled networks which performs dynamic channel configuration for utilizing multiple

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ZHANG, Yi, Wenfei HU, JunWu ZHANG, and Jing ZHANG. "Wireless Channel Propagation Model for Inland Waterway Bridge Scenario." Promet - Traffic&Transportation 36, no. 5 (2024): 934–45. http://dx.doi.org/10.7307/ptt.v36i5.606.

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Intelligent shipping is a crucial part of the transportation system, while inland river intelligent shipping is a major safeguard of intelligent transportation. Compared with the studies of mobile fading channels in land-based environments, less current research has focused on channel measurements and modeling for inland waterway bridge environments. In this paper, a segmenting radio channel model is proposed for inland highway and railway combined bridges. The ship's path under the bridge was divided into three phases, and the attenuation of signal strength was modelled separately for each. H

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Wu, Chien-Min, Yen-Chun Kao, and Kai-Fu Chang. "A Multichannel MAC Protocol for IoT-enabled Cognitive Radio Ad Hoc Networks." Advances in Technology Innovation 5, no. 1 (2020): 45–55. http://dx.doi.org/10.46604/aiti.2020.3946.

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Cognitive radios have the ability to dynamically sense and access the wireless spectrum, and this ability is a key factor in successfully building Internet-of-Things (IoT)-enabled mobile ad hoc networks. This paper proposes a contention-free token-based multichannel MAC protocol for IoT-enabled Cognitive Radio Ad Hoc Networks (CRAHNs). In this, secondary users of CRAHNs detect activity on the wireless spectrum and then access idle channels licensed by primary users. CRAHNs are divided into clusters, and the channel to use for transmission is determined dynamically from the probability of findi

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Loganathan, Jayakumar, S. Janakiraman, and Ankur Dumka. "Optimal Spectrum-Hole Detection Scheme for Cooperative CRN Using Dynamic Weighted VIKOR." International Journal of Enterprise Information Systems 16, no. 1 (2020): 108–31. http://dx.doi.org/10.4018/ijeis.2020010106.

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In the future, the wireless network environment may suffer due to the unavailability of new spectrum bands. Cognitive radio research considers the current spectrum underutilization and provides a better model for the next-generation wireless environment. Since the implementation of the cognitive radio and its policies is a bigger challenge under static spectrum allocation, i.e., current wireless networks policy, many issues are in front of us to accomplish a better cognitive radio wireless environment. One of the major challenges is a secure transmission and efficient free channel selection. I

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Shailender, Shelej Khera, Sajjan Singh, and Jyoti. "Estimation of Channel for Millimeter-Wave Hybrid Massive MIMO Systems using Orthogonal Matching Pursuit (OMP)." Journal of Physics: Conference Series 2327, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1742-6596/2327/1/012040.

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Abstract In a millimeter-wave (mm-Wave) large MIMO system, hybrid precoding is a critical component for lowering radio-frequency hardware costs as compared to the traditional full-digital precoding strategy. Knowledge of channels is required for hybrid precoding. Though, estimation of the channel is problematic for the mm-Wave system because of the usage of a massive array of antenna and hybrid architecture with analog precoding. Due to the extremely directed nature of wireless propagation, wireless channels have spatial sparsity. In this paper, we exploit this spatial sparsity nature of wirel

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Heider, Inaam Abbas. "Improvement of Fading Channel Modeling Performance for Wireless Channel." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 3 (2018): 1451. http://dx.doi.org/10.11591/ijece.v8i3.pp1451-1459.

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Fading channel modeling is generally defined as the variation of the attenuation of a signal with various variables. Time, geographical position, and radio frequency which is included. Fading is often modeled as a random process. Thus, a fading channel is a communication channel that experiences fading. In this paper, the proposed system presents a new design and simulate a wireless channel using Rayleigh channels. Rayleigh channels using two approaches (flat and frequency-selective fading channels) in order to calculate some path space loss efforts and analysis the performance of different wi

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Inaam, Abbas Hieder. "Improvement of Fading Channel Modeling Performance for Wireless Channel." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 3 (2018): 1451–59. https://doi.org/10.11591/ijece.v8i3.pp1451-1459.

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Fading channel modeling is generally defined as the variation of the attenuation of a signal with various variables. Time, geographical position, and radio frequency which is included. Fading is often modeled as a random process. Thus, a fading channel is a communication channel that experiences fading. In this paper, the proposed system presents a new design and simulate a wireless channel using Rayleigh channels. Rayleigh channels using two approaches (flat and frequency-selective fading channels) in order to calculate some path space loss efforts and analysis the performance of different wi

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Talekar, Sopan, Satish Banait, and Mithun Patil. "Improved Q-Reinforcement Learning based Optimal Channel Selection in Cognitive Radio Networks." International journal of Computer Networks & Communications 15, no. 3 (2023): 1–14. http://dx.doi.org/10.5121/ijcnc.2023.15301.

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Cognitive Radio Networks are an emerging technologyin forwireless communication. With increasing number of wireless devices in wireless communication, there is a shortage of spectrum. Also, due to thestatic allocation of channels in wireless networks, there is a scarcity of spectrum underutilization. For efficient spectrum utilization, secondary users dynamically select the free channel of primary users for the transmission of packets. In this work, the performance of routing in a cognitive radio network is improved by the decision of optimal channel selection. The aim of this work is to maxim

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Hassan, Zahid, and Asaduzzaman. "Advanced Recursive Best-First Search (RBFS) based Routing Protocol for Multi-hop and Multi-Channel Cognitive Wireless Mesh Networks." Journal of Computer Science and Technology Studies 6, no. 1 (2024): 01–10. http://dx.doi.org/10.32996/jcsts.2024.6.1.1.

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Cognitive Wireless Mesh Network (CWMN) is an opportunistic network in which radio channels can be assigned according to their availability to establish connections among nodes. After establishing a radio connection among nodes, it is necessary to find an optimal route from the source node to the destination node in the network. If there remain more channels among nodes, the minimum weighted channel should be taken into account to establish expected routes. The graph theoretic approach fails to model the multi-channel cognitive radio networks due to abrupt failure in finding new successful rout

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Khan, Mohammad Monirujjaman, Qammer H. Abbasi, Akram Alomainy, and Yang Hao. "Performance of Ultrawideband Wireless Tags for On-Body Radio Channel Characterisation." International Journal of Antennas and Propagation 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/232564.

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Experimental characterisation of on-body radio channel for ultrawideband (UWB) wireless active tags is reported in this paper. The aim of this study is to investigate the performance of the commercially available wireless tags on the UWB on-body radio channel characterisation. Measurement campaigns are performed in the chamber and in an indoor environment. Statistical path loss parameters of nine different on-body radio channels for static and dynamic cases are shown and analyzed. Results demonstrated that lognormal distribution provides the best fits for on-body propagation channels path loss

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Yang, Yong, Yu Liang Li, and Jing Li. "Radio Channel Research in Coal Mine Laneways." Advanced Materials Research 605-607 (December 2012): 2222–26. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.2222.

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The transmission mode of wireless waves in coal mine tunnel is different from the mode in free space.The multipath propagation of wireless wave is severe in tunnel.As a result,the characteristics study of multipath propagation is very important to the design of wireless communication system in coal mine tunnel.After analyzing the multipath propagation attenuation in tunnel,the statistics of single frequency signal,narrowband signal and broadband signal are obtained.This is the foundation for the application of resisting multipath decline techniques.

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Rai, Prativa, Mrinal Kanti Ghose, and Hiren Kumar Deva Sarma. "Design of utility functions for game-based channel allocation in cognitive radio wireless sensor network." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 2 (2021): 1013. http://dx.doi.org/10.11591/ijeecs.v22.i2.pp1013-1023.

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Cognitive radio enabled wireless sensor network is capable of reducing the spectrum scarcity problem of the wireless networks. Looking at the scarcity of available bandwidth, and the high growth in the number of communication devices in recent times, cognitive radio technology has proven to be a promising technology for the days to come. The application of Game Theory in cognitive radio networks has been visible in recent research works. However, only limited literature is available in which possibilities of applying the game-theory based approaches for the challenging task of channel assignme

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Rai, Prativa, Mrinal Kanti Ghose, and Hiren Kumar Deva Sarma. "Design of utility functions for game-based channel allocation in cognitive radio wireless sensor network." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 2 (2021): 1013–23. https://doi.org/10.11591/ijeecs.v22.i2.pp1013-1023.

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Cognitive radio enabled wireless sensor network is capable of reducing the spectrum scarcity problem of the wireless networks. Looking at the scarcity of available bandwidth, and the high growth in the number of communication devices in recent times, cognitive radio technology has proven to be a promising technology for the days to come. The application of game theory in cognitive radio networks has been visible in recent research works. However, only limited literature is available in which possibilities of applying the game-theory based approaches for the challenging task of channel assignme

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Zhurakovskyi, Bohdan, and Oleksiy Nedashkivskiy. "SYSTEM TO COLLECT INFORMATION WHEN TRANSFERRING DATA TO RADIO CHANNELS." Cybersecurity: Education, Science, Technique 3, no. 15 (2022): 6–34. http://dx.doi.org/10.28925/2663-4023.2022.15.634.

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This article is devoted to solving the problem of information protection in radio channels, by applying comprehensive measures to protect against possible attacks aimed at intercepting and substituting transmitted data. The aim of the work is to analyze the security of wireless networks, identify methods for their protection and create a model for protecting wireless networks. In order to achieve this goal, the following list of tasks was performed: the existing solutions in the field of information protection through radio networks were analyzed; the description of the offered developed model

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Lala, Nisar A., G. M. Mir, Altaf A. Balkhi, and N. A. Sofi. "Fuzzy Rule based Quality of Service Provisioning in Cognitive Radio Network." Oriental journal of computer science and technology 11, no. 1 (2018): 55–63. http://dx.doi.org/10.13005/ojcst11.01.10.

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Cognitive radio (CR) is a novel technology to resolve the issue of under-utilization of wireless spectrum. Quality of service (QoS) provisioning in CR networks to large number of traffic as per their need is not an easy task since no wireless spectrum is available on permanent basis for its operation. In this paper, few critical QoS parameters namely dynamic-availability-of-idle-channels (avail-idle-channel), expected-holding-time-of-idle-channel (HT-idle-channel) and user-mobility are chosen to analyze their impact over quality of service of the communicating cognitive users using rule-based

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Agarkhed, Jayashree, and Veeranna Gatate. "ICBCA – Improved Cluster Based Channel Allocation in Cognitive Radio Sensor Networks." Journal of Telecommunications and Information Technology 3 (September 30, 2020): 28–35. http://dx.doi.org/10.26636/jtit.2020.139820.

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Wireless sensor networks (WSNs) operate in an overcrowded electromagnetic environment, as the spectrum is shared by various wireless communication technologies. This gives rise to various challenges related to optimized and eﬃcient spectrum utilization. Cognitive radio (CR) has emerged as a solution satisfying this requirement, as it is capable of adapting to the dynamic radio spectrum. Thanks to the deployment of cognitive radio in WSNs, the spectrum may be utilized in a more eﬃcient manner. CR may identify the vacant channels dynamically, allowing the sensor nodes to eﬀectively communicate w

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Ren, Jin. "Performance of HD Radio System." Applied Mechanics and Materials 678 (October 2014): 477–81. http://dx.doi.org/10.4028/www.scientific.net/amm.678.477.

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The advance of wireless communications brings in various schemes of wireless digital communication technology. Analog communication and broadcasting services convert into digital services in many countries. The IBOC (In-Band On-Channel) system has been developed to work in the same band with the conventional analog radio and broadcasting digital signal simultaneously. HDR (HD-Radio) standard of IBOC (In-Band-On-Channel) can use coherent demodulation using pilot sub-carriers. In this paper, the performance of HD radio system is evaluated. To contribute to decision of digital radio standard and

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Thavaselan, Gopinathan, and Ranganathan Rani Hemamalini. "Performance Analysis of Coded Reception in Multipath Fading Channels with Wavelet Packet Based OFDM Transmission." Applied Mechanics and Materials 573 (June 2014): 400–406. http://dx.doi.org/10.4028/www.scientific.net/amm.573.400.

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Abstract. Radio propagation on wireless channels depends on many static and dynamic factors like, buildings, trees, mountains, frequency of operation, velocity of mobile stations and interfering sources. Mathematical models for channel are considered for various communication functions like, predicting radio coverage, estimation of interferences from various sources, estimating the characteristics of an alternate transmitter and receiver, achievable data rates and for determining the location for wireless infrastructure. Signal propagation in fading channels cause degradation of signal QoS. OF

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Mihnea, Amalya, and Mihaela Cardei. "Efficient Wireless Communication in Grid Networks." International Journal of Interdisciplinary Telecommunications and Networking 7, no. 3 (2015): 57–79. http://dx.doi.org/10.4018/ijitn.2015070105.

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The authors give lower and upper bounds for capacity in grid networks when using one channel and one radio per node. We also analyze the capacity for multiple channels and make connections to channel assignment algorithms that we introduced previously, which are robust to the presence of primary users. The bounds obtained depend on the range of communication, the distance between nodes and the size of the grid network. Using our communication pattern, node communication can be scheduled to ensure end-to-end communication between any two nodes in a grid network while maximizing capacity.

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Mak, Bing, Sudhanshu Arya, Ying Wang, and Jonathan Ashdown. "Characterization of Low-Latency Next-Generation eVTOL Communications: From Channel Modeling to Performance Evaluation." Electronics 12, no. 13 (2023): 2838. http://dx.doi.org/10.3390/electronics12132838.

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Next-generation wireless communication networks are expected to offer extremely high data rates supported by very low latency and radically new applications, which require a new wireless radio technology paradigm. However, it is crucial to assist the radio link over the fast varying and highly dynamic channel to satisfy the diverse requirements of next-generation wireless networks. Recently, communication via autonomous electric vertical takeoff and landing (eVTOL) has gained momentum, owing to its potential for cost-effective network deployment. It is considered one of the most promising tech

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Kalistatov, Kalistratov Dmitry. "Wireless Video Monitoring of the Megacities Transport Infrastructure." Civil Engineering Journal 5, no. 5 (2019): 1033–40. http://dx.doi.org/10.28991/cej-2019-03091309.

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The article discusses the development of megacities transport infrastructure. The problem of traffic congestion is touched upon, the task of optimal road design is justified. In the context of these issues gives a system of wireless video monitoring of traffic flows on base of digital panoramic video images. The main objective is to obtain a universal mathematical model for the description of a radio signal with any type of digital modulation. This will greatly facilitate the parametric calculation of the radio channel for image transmission and the design of the monitoring system. The objecti

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Pushpa Latha, S., and R. Sabitha. "New Analytical Channel Allocation Methodology for Multichannel Multi-Radio Wireless Networks." Journal of Computational and Theoretical Nanoscience 17, no. 5 (2020): 2396–401. http://dx.doi.org/10.1166/jctn.2020.8902.

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In wireless technologies, jamming attack is a main Research problem in multichannel multi-radio as they block communication in wireless networks. Malicious nodes block legitimate communication through jamming attacks that causes intentional interference. This paper presents the problem of jamming attack in multichannel multi-radio wireless network. First, Allocated the channel in Randomized manner and measure the Entropy rate. Second, defined the channel capacity. Third determined noiseless channel. Furthermore, Find the responses from channel and compare Response channel (H(S/R)) with Noise l

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Düngen, Monique, Thomas Hansen, Ramona Croonenbroeck, et al. "Channel measurement campaigns for wireless industrial automation." at - Automatisierungstechnik 67, no. 1 (2019): 7–28. http://dx.doi.org/10.1515/auto-2018-0052.

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Abstract The factories of the future will be highly digitalized in order to enable flexible and interconnected manufacturing processes. Especially wireless technologies will be beneficial for industrial automation. However, the high density of metallic objects is challenging for wireless systems due to multipath fading. In order to understand the signal propagation in industrial environments, this paper provides results from a number of channel measurement campaigns funded by the German research initiative “Reliable wireless communication in the industry”. We give an overview of different meas

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Prasad Joshi, Gyanendra, Seung Yeob Nam, Sung Won Kim, and Byung-Seo Kim. "Adaptive Window Size-Based Medium Access Control Protocol for Cognitive Radio Wireless Sensor Networks." Journal of Sensors 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/2049859.

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Many existing medium access control protocols for cognitive radio wireless sensor networks waste bandwidth and suffer from delay because of the fixed channel negotiation period in the common control channel. In this paper, we propose a medium access control protocol for cognitive radio wireless sensor networks that adjusts the channel negotiation period based on network density. We simulate the proposed approach and compare it to the performance of the fixed channel negotiation period based approaches. The results show that the proposed approach efficiently utilizes white spaces and increases

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Kaur, Kamaldeep, and Abhimanyu Nain. "RoFSO- Theoretical Study and Review." International Journal of Microsystems and IoT 1, no. 6 (2023): 394–401. https://doi.org/10.5281/zenodo.10389520.

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Radio frequency (RF) communication technology is facing challenges in fulfilling the transmission medium demand of this IOTs (Internet of things) world due to exponential growth of wirelessly communicating electronic devices. Everybody and everything need some wireless spectrum to transmit information, but RF spectrum is limited. Speed of increasing data hungry devices is much more than emerging technologies trying to keep pace with growing demand for wireless channels. Free space optics (FSO) is one of such technologies working towards fulfilling spectrum demand till the last mile connectivit

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Li, Mingming, Jiaru Lin, Fazhong Liu, Dongxu Wang, and Li Guo. "Cognitive MIMO Radio." International Journal of Cognitive Informatics and Natural Intelligence 5, no. 2 (2011): 58–79. http://dx.doi.org/10.4018/jcini.2011040104.

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The authors consider a cognitive radio network in which a set of cognitive users make opportunistic spectrum access to one primary channel by time-division multiplexing technologies. Multiple Input Multiple Output techniques (MIMO) are similarly considered to enhance the stable throughput for cognitive links while they should guarantee co-channel interference constraints to the primary link. Here, two different cases are considered: one is that cognitive radio network is distributed; the other is centrally-controlled that cognitive radio network has a cognitive base station. In the first case,

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Bo, Ai, Thomas Kürner, César Briso Rodríguez, and Hsiao-Chun Wu. "Radio Wave Propagation and Wireless Channel Modeling." International Journal of Antennas and Propagation 2013 (2013): 1–3. http://dx.doi.org/10.1155/2013/835160.

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Mohandass, S., G. Umamaheswari, and H. Kowsika. "Wireless Image Transmission Based on Cognitive Radio for Robotic Communication." Advanced Materials Research 984-985 (July 2014): 1370–74. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.1370.

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Wireless communication plays a vital role in robotic communication. The robots can communicate using any of the wireless standards like Bluetooth, Zigbee, Wi-fi, etc. based on the application. Many applications involve wireless transmission of images from the robots to the access point. The images can be transmitted at a particular frequency based on the wireless standard. However, interference is a major issue in wireless communication. In order to overcome interference and to make use of white space spectrum, cognitive radio is used. Hence in this paper, wireless image transmission based on

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Nguyen Minh, Quy, Ban Nguyen Tien, and Quy Vu Khanh. "Improved Multi-Channel Multi-Interface Routing Protocol for Wireless Mesh Networks." International Journal of Interactive Mobile Technologies (iJIM) 16, no. 11 (2022): 136–48. http://dx.doi.org/10.3991/ijim.v16i11.29433.

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In recent years, Wireless Mesh Networks (WMN) are emerging as a potential technology to enhance the ability and availability of wireless networks. WMN consists of wireless mesh routers and terminals connected by wireless multi-hop communication. Besides, in WMN, each wireless node owns many interfaces, and each interface operates on many channels. However, effectively using multiple orthogonal channels and multiple interfaces to increase the performance of WMN and decrease the radio link transmission interference is of significant challenge. In this paper, we consider routing issues in WMN. Th

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Hassan, Walaa, and Tamer Farag. "Adaptive Allocation Algorithm for Multi-Radio Multi-Channel Wireless Mesh Networks." Future Internet 12, no. 8 (2020): 127. http://dx.doi.org/10.3390/fi12080127.

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The wireless mesh network (WMN) has proven to be a great choice for network communication technology. WMNs are composed of access points (APs) that are installed and communicate with each other through multi-hop wireless networks. One or more of these APs acts as a gateway (GW) to the internet. Hosts of WMNs are stationary or mobile. According to the structure of WMNs, some network features may be affected, such as the overall performance, channel interference, and AP connectivity. In this paper, we propose a new adaptive channel allocation algorithm for a multi-radio multi-channel wireless me

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Ye, Zhengmao. "Exploring Impact of Doppler Effect on Time-Varying Multipath Wireless Communication Channels via Model Based Characteristic Analysis." WSEAS TRANSACTIONS ON SIGNAL PROCESSING 20 (December 31, 2024): 145–52. https://doi.org/10.37394/232014.2024.20.15.

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In areas of outdoor wireless communication, the Doppler shift occurs due to the relative motion between the transmitter and receiver. To apply any baseband channel model for multipath propagation, some real-world phenomena must be taken into account, such as the Doppler effect, time dispersion, and multipath scattering. Time dispersion of the radio channel leads to the Intersymbol Interference (ISI) which degrades communication performance. Scattering at diverse angles gives rise to a range of Doppler frequency shifts referred to as the Doppler spectrum. The maximum Doppler shift arises whenev

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Zakaria, Omar M., Aisha-Hassan A. Hashim, Wan H. Hassan, et al. "Joint Channel Assignment and Routing in Multiradio Multichannel Wireless Mesh Networks: Design Considerations and Approaches." Journal of Computer Networks and Communications 2016 (2016): 1–24. http://dx.doi.org/10.1155/2016/2769685.

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Multiradio wireless mesh network is a promising architecture that improves the network capacity by exploiting multiple radio channels concurrently. Channel assignment and routing are underlying challenges in multiradio architectures since both determine the traffic distribution over links and channels. The interdependency between channel assignments and routing promotes toward the joint solutions for efficient configurations. This paper presents an in-depth review of the joint approaches of channel assignment and routing in multiradio wireless mesh networks. First, the key design issues, model

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Gutierrez del Arroyo, Jose A., Brett J. Borghetti, and Michael A. Temple. "Considerations for Radio Frequency Fingerprinting across Multiple Frequency Channels." Sensors 22, no. 6 (2022): 2111. http://dx.doi.org/10.3390/s22062111.

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Radio Frequency Fingerprinting (RFF) is often proposed as an authentication mechanism for wireless device security, but application of existing techniques in multi-channel scenarios is limited because prior models were created and evaluated using bursts from a single frequency channel without considering the effects of multi-channel operation. Our research evaluated the multi-channel performance of four single-channel models with increasing complexity, to include a simple discriminant analysis model and three neural networks. Performance characterization using the multi-class Matthews Correlat

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Afonin, Igor L., Vladislav V. Golovin, Mikhail O. Tkachenko, Yury N. Tyschuk, Alexander L. Polyakov, and Gennady V. Slyozkin. "Radio coverage of the coastal marine zone with the use of a wireless broadband optical channel for the organization of intensive navigation." Radioelectronics. Nanosystems. Information Technologies. 16, no. 2 (2024): 297–306. http://dx.doi.org/10.17725/j.rensit.2024.16.297.

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The model of a wireless broadband optical channel designed for communication between the coastal subsystem and an air repeater that provides coverage of the coastal sea area for the organization of intensive navigation, including the use of unmanned vessels is presented. It is shown that direct coast-to-ship data transmission using Wi-Fi and 4G/LTE technologies has a number of disadvantages for bays with complex coastal terrain. The use of a wireless optical channel in the "point-to-point" format between the coastal subsystem and the air transmitter makes it possible to provide high-quality ra

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Juraschek, Felix, Mesut Günes, and Bastian Blywis. "A Framework for External Interference-Aware Distributed Channel Assignment." International Journal of Wireless Networks and Broadband Technologies 1, no. 4 (2011): 40–54. http://dx.doi.org/10.4018/ijwnbt.2011100103.

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DES-Chan is a framework for experimentally driven research on distributed channel assignment algorithms in wireless mesh networks. DES-Chan eases the development process by providing a set of common services required by distributed channel assignment algorithms. A new challenge for channel assignment algorithms are sources of external interferences. With the increasing number of wireless devices in the unlicensed radio spectrum, co-located devices that share the same radio channel may have a severe impact on the network performance. DES-Chan provides a sensing component to detect such external

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Jun, Luo, Lu Wen Jun, Ye Fei, Sun Shuang Xi, and Pe Dong Hui. "Design and Implementation of Wireless Channel Test System of UAV." Applied Mechanics and Materials 380-384 (August 2013): 757–60. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.757.

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UAV wireless channel is the core of their communications systems, this paper designed a stepper adjustable independently programmable power attenuation device and contains three functional subsystems to achieve a radio channel test equipment for testing wireless channel launch power attenuation, receiver sensitivity and receiver bit error rate and other key technical indicators.

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Cui, Linlin, and Feng Li. "Radio Number of Cartesian Products of Complete Bipartite Graphs and Odd Cycles." Utilitas Mathematica 121, no. 1 (2024): 137–50. https://doi.org/10.61091/um121-09.

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With the rapid development of wireless communication networks, it brings more and more convenience to users. However, with the expansion of network size, the limitation of channel resources in network communication is becoming more obvious. Effective channel assignment has a great impact on the quality of communication networks. However, in real communication networks, underutilization of channels and excessive number of channels produce large interference, so it is necessary to find a reasonable channel assignment method. In this paper, we study the optimal channel assignment strategy for the

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Faustov, I. S., V. B. Manelis, V. A. Kozmin, and A. B. Tokarev. "Antenna Diversity of Wi-Fi Signals Using a Switched Antenna Array." Proceedings of Telecommunication Universities 11, no. 1 (2025): 53–61. https://doi.org/10.31854/1813-324x-2025-11-1-53-61.

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Relevance. The active use of wireless technologies requires the development of controls for wireless networks, in particular Wi-Fi networks. Radio monitoring services solve the tasks of detecting, identifying and localizing unauthorized access points and clients. An effective tool for bearing radio signals is correlation interferometric direction finders based on two-channel receiving equipment and a multi-element antenna system. The development of methods of joint identification and bearing makes it possible to separate the bearings of a large number of signal sources operating in the same fr

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Ren, Jin, and Ting Zhang. "Performance Evaluation of HD Radio System in Radio Environments." Open Electrical & Electronic Engineering Journal 9, no. 1 (2015): 247–52. http://dx.doi.org/10.2174/1874129001509010247.

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The advance of wireless communications brings in various schemes of wireless digital communication technology. Analog communication and broadcasting services convert into digital services in many countries. The IBOC (In- Band On-Channel) system has been developed to work in the same band with the conventional analog radio and broadcasting digital signal simultaneously. HDR (HD-Radio) standard of IBOC can use coherent demodulation using pilot subcarriers. In this paper, the performance of HD radio system is evaluated. To contribute to decision of digital radio standard and design of digital rad

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