Journal articles: 'Radio link design'

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Yarkoni, N., N. Blaunstein, and D. Katz. "Link budget and radio coverage design for various multipath urban communication links." Radio Science 42, no. 2 (April 2007): n/a. http://dx.doi.org/10.1029/2005rs003345.

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Kanai, Toshihito. "Exact radio link design in cellular mobile communication systems." Electronics and Communications in Japan (Part I: Communications) 72, no. 6 (June 1989): 46–54. http://dx.doi.org/10.1002/ecja.4410720605.

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Choi, Hyo-Ki, Ho-Joon Jang, Young-Hwan Song, Dhong-Woon Jang, Jae-Woo Joo, and Nan-Sol Seo. "Radio Link Modem System Architecture Design for Korean Tactical Data Link System Implementation." Journal of the Korea Institute of Military Science and Technology 16, no. 6 (December 5, 2013): 789–96. http://dx.doi.org/10.9766/kimst.2013.16.6.789.

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Sheikh, A. U. H., D. C. Coll, R. G. Ayers, and J. H. Bailey. "ATCS: Advanced Train Control System radio data link design considerations." IEEE Transactions on Vehicular Technology 39, no. 3 (1990): 256–62. http://dx.doi.org/10.1109/25.131007.

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Wake, David, Anthony Nkansah, and Nathan J. Gomes. "Radio Over Fiber Link Design for Next Generation Wireless Systems." Journal of Lightwave Technology 28, no. 16 (August 2010): 2456–64. http://dx.doi.org/10.1109/jlt.2010.2045103.

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Pérez, Percy Poquis, Brian Meneses Claudio, and Alexi Delgado. "Design of a Hot Air Balloons for Wireless Internet Transmission in Awajún Communities in Huampami, Amazonas-Perú." International Journal of Emerging Technology and Advanced Engineering 11, no. 9 (September 20, 2021): 55–65. http://dx.doi.org/10.46338/ijetae0921_07.

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Abstract— One of the problems that causes educational inequality is the lack of access to Internet service, this is what happens in the Awajún communities in Huampami Amazonas– Perú, a remote area abandoned by the Peruvian state where Internet access is scarce. According to the province, at the primary level, in Condorcanqui only 5.29% have access to the internet, while at the secondary level 32.43% have access to the Internet service. That is why in this research work, it is proposed to bring the internet service through a point-to-point link using hot air balloons, because this wireless technology has a better performance in terms of service availability, latency, and transmission speed. Finally, through the Radio Mobile software and Google Earth, the simulation of the point-to-point link is carried out where a line of sight is obtained as a result, which indicates that it is feasible to make a radio link, in addition a reception level of - 49.8 dBm and a distance between the two points of 7.79km, it is also determined that the hot air balloon must be at a height of 90 meters for the coverage to be greater. Keywords— Education; Point to Point Link; Radio Mobile; rural zone; radiolink

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Suwa, Keisuke, and Ryoji Kawasaki. "Radio link design and reverse link capacity on microcellular DS-CDMA wideband transmission systems." Electronics and Communications in Japan (Part I: Communications) 82, no. 9 (September 1999): 51–60. http://dx.doi.org/10.1002/(sici)1520-6424(199909)82:9<51::aid-ecja6>3.0.co;2-a.

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Muñoz, Pablo, Isabel de la Bandera, Fernando Ruiz, Salvador Luna-Ramírez, Raquel Barco, Matías Toril, Pedro Lázaro, and Jaime Rodríguez. "Computationally-Efficient Design of a Dynamic System-Level LTE Simulator." International Journal of Electronics and Telecommunications 57, no. 3 (September 1, 2011): 347–58. http://dx.doi.org/10.2478/v10177-011-0047-2.

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Computationally-Efficient Design of a Dynamic System-Level LTE SimulatorThe Long-Term Evolution (LTE) is the next generation of current mobile telecommunication networks. LTE has a new flat radio-network architecture and a significant increase in spectrum efficiency. In this paper, a computationally-efficient tool for dynamic system-level LTE simulations is proposed. A physical layer abstraction is performed to predict link-layer performance with a low computational cost. At link layer, there are two important functions designed to increase the network capacity: Link Adaptation and Dynamic Scheduling. Other Radio Resource Management functionalities such as Admission Control and Mobility Management are performed at network layer. The simulator is conceived for large simulated network time to allow evaluation of optimization algorithms for the main network-level functionalities.

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Rudinskas, Darius, Zdobyslaw Goraj, and Jonas Stankūnas. "SECURITY ANALYSIS OF UAV RADIO COMMUNICATION SYSTEM." Aviation 13, no. 4 (December 31, 2009): 116–21. http://dx.doi.org/10.3846/1648-7788.2009.13.116-121.

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This paper presents analyzed questions of the safety of the information transferred by the radio connection link of the Polish UAV project “Aircraft for monitoring” SAMONIT. This safety is especially important for the design and use of unmanned aerial vehicles (UAV). This paper also presents the structure of the SAMONIT communication system, security threats to the radio connection system, and possible measures to ensure secure information. Santrauka Straipsnyje nagrinejami Lenkijos bepiločiu orlaiviu projekto SAMONIT (monitoringo lektuvas) radijo ryšiu perduodamos informacijos saugumo klausimai. Ypač svarbi yra radijo ryšiu perduodamos informacijos apsauga kuriant bepiločius orlaivius (BO) ir kitas nuotolinio valdymo transporto priemones. Straipsnyje pateikiama SAMONIT ryšiu sistemos struktūra, galimos gresmes informacijos perdavimui, saugumui bei integralumui; taip pat radijo ryšio sistemos apsaugos būdai bei priemones.

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Sousa, Ivo, Nuno Sousa, Maria Paula Queluz, and António Rodrigues. "Fronthaul Design for Wireless Networks." Applied Sciences 10, no. 14 (July 10, 2020): 4754. http://dx.doi.org/10.3390/app10144754.

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Cloud Radio Access Network (C-RAN) architectures have arisen as an alternative to traditional wireless network architectures, notably by taking advantage of the functional split between the multiple distributed Remote Radio Heads (RRHs) and the centralized Baseband Units (BBUs), through the creation of a new connectivity segment—the fronthaul. In order to maximize the investment return, it is important to find out, for this C-RAN segment, which technologies provide cost-effective solutions. This paper addresses this issue by evaluating and comparing the performance of Microwave Radio Transmission (MRT), Free Space Optics (FSO), and Fiber Optics (FO) technologies when applied to the fronthaul. First, a methodology is provided to determine the most cost-effective solution for each RRH–BBU link, as well as to compute the required number of BBUs and where they should be positioned in order to minimize the overall network costs. Next, a cost-effectiveness comparison of the aforementioned communication technologies is presented for individual fronthaul segments under different weather conditions, link lengths, and bit rate requirements. Moreover, an assessment is performed regarding the impact of the RRH density on the selection of cost-effective communication technologies for C-RANs. The obtained results allow concluding that fronthaul expenses are significantly affected by the performance of FSO systems, which in turn is affected by weather conditions; this highlights the relevance of having accurate climate statistics and forecasts in order to get the most out of the FSO technology and, consequently, lowering the overall network costs.

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Zhan, Zhaowu, Guillaume Villemaud, Florin Hutu, and Jean-Marie Gorce. "Digital I/Q imbalance correction for full-duplex dual-band OFDM radio transceivers." International Journal of Microwave and Wireless Technologies 8, no. 3 (July 6, 2015): 505–19. http://dx.doi.org/10.1017/s1759078715000811.

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This paper presents a full-duplex dual-band orthogonal frequency division duplexing (OFDM) radio architecture that enables the radio transceiver to be more flexible and provides a viable radio link capacity gain. A simple but practical I/Q imbalance estimation and compensation method, based on the frequency-flat-fading behavior of the self-interference channel, is proposed. The performance of the proposed I/Q imbalance compensation method is evaluated by link level simulation conducted with Advanced Design System and Matlab. The co-simulation results show that the proposed radio transceiver could potentially increase the physical layer transmission rate by four times compared with the conventional radio link at the cost of tolerable loss of bit error rate performance. The I/Q imbalance compensation method can effectively compensate both high and low I/Q imbalance without the problem of algorithm convergence.

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Adzhibekov, A. A., V. V. Berezkin, A. N. Ershov, A. V. Petrov, A. S. Tusov, and P. V. Shishmintsev. "Study of the Possibility of Building an Ultra-High-Speed Radio Link for ERS Systems with the Implementation of Polarization Multiplexing (Short Report)." Rocket-space device engineering and information systems 8, no. 4 (2021): 58–62. http://dx.doi.org/10.30894/issn2409-0239.2021.8.4.58.62.

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The present report sets forth the results of an analysis of previously published materials, obtained by means of an experiment on doubling the throughput of an ultra-high-speed radio link by realizing the second channel via polarization multiplexing. The improvement of the design of elements ensuring polarization isolation makes it possible to significantly increase the ellipticity ratio of the AFD (antenna feeder device) and, ultimately, to enhance transmission quality and/or simplify the requirements for other components of the radio link. For example, by using polarization multiplexing it is possible to increase the transmission rate in the radio link or use a simpler correcting code.

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Jiang, Xiaoyan. "Software design of the smart antenna in the connectivity infotainment system." Modern Physics Letters B 32, no. 34n36 (December 30, 2018): 1840102. http://dx.doi.org/10.1142/s0217984918401024.

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This paper designs a smart antenna system for the connective vehicle infotainment. It provides a whole software solution for the Vehicle Head Unit independent with OS system. It includes worldwide analog and digital radio and TV, full radio stacks, FM to DAB on web radio seamlessly, vehicle networking management. This paper is to define the interface between the smart antenna module and the Head Unit. The physical link between the smart antenna and the Head Unit is Ethernet, the interface is based on several protocols based on IP protocol such as UPnP, HTTP to receive a radio signal and use it. Thanks to the open source structures and integrating all the radio stacks, this system is much easier for OEM vehicle companies and Tier one suppliers to adopt the smart antenna into the infotainment Head Unit. It saves them a lot of developing time and cost.

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AUST, S., P. DAVIS, A. YAMAGUCHI, and S. OBANA. "Enhanced Link-Status Detection for High Speed Link Aggregation in Cognitive Radio Networks." IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E91-A, no. 7 (July 1, 2008): 1609–15. http://dx.doi.org/10.1093/ietfec/e91-a.7.1609.

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Md Rafiqul, Islam, Md Moktarul Alam, Ali Kodhim Lwas, and Sarah Yasmin Mohamad. "Rain Rate Distributions for Microwave Link Design Based on Long Term Measurement in Malaysia." Indonesian Journal of Electrical Engineering and Computer Science 10, no. 3 (June 1, 2018): 1023. http://dx.doi.org/10.11591/ijeecs.v10.i3.pp1023-1029.

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Attenuation due to rain is an important constraint in microwave radio link design especially at frequencies above 10 GHz. It restricts the path length of radio communication systems and limits the use of higher frequencies for line-of-sight microwave links and satellite communications. In order to predict the attenuation due to rain accurately rainfall intensity is required with 1-minute integration time. Rainfall is a meteorological phenomenon with complex structure due to its variability in space, duration and occurrence frequency, particularly in tropical and equatorial regions. Since, the statistical distribution of rain attenuation is obtained from the rain rate distribution for the region considered, it should be noted that the accuracy of the rain rate measurement affects the accuracy of the attenuation estimation. This paper presents rain intensity with 1-minute integration time measured for 6 years in Malaysia, it’s distribution, comparison with other prediction models and impact on high frequency microwave links.

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Kamaruddin, Nur Amalina, Kamilia Kamardin, Yoshihide Yamada, Norsiha Zainudin, Takuji Arima, Naobumi Michishita, and Masaharu Takahashi. "Near field radio link design in fat phantom for Wireless Capsule Endoscopy application." Journal of Physics: Conference Series 2250, no. 1 (April 1, 2022): 012002. http://dx.doi.org/10.1088/1742-6596/2250/1/012002.

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Abstract Medical devices such as Wireless Capsule Endoscopy (WCE) that need wireless imaging and monitoring, operating at 402 MHz, is considered to be in the near field region due to the distance being shorter than the wavelength. In this paper, the radio link calculation method in the near field region is investigated. Normal Mode Helical Antenna (NMHA) is used as the transmitter antenna which is placed inside of a fat phantom of 11.6 F/m and the receiver antenna at distance 0.1 to 1.0 m apart. For link budget establishment, parameters such as power density, W and receiver antenna effective area, Ae are investigated through electromagnetic simulation. The distance dependency of W is examined and the result of W∝ 1/(distance)2 is obtained. The relation of Ae of the receiver antenna is found to be the size of the cross-section area of the antenna. A radio link equation is formed by employing W, Ae and other propagation loss factors of a medium and is then compared with the power received, PR and S21 obtained from simulation. The agreement between calculated and simulated results shows that this equation can be used in the near field region.

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Haldorai, Anandakumar, Jeevanandham Sivaraj, Munivenkatappa Nagabushanam, and Michaelraj Kingston Roberts. "Cognitive Wireless Networks Based Spectrum Sensing Strategies: A Comparative Analysis." Applied Computational Intelligence and Soft Computing 2022 (October 30, 2022): 1–14. http://dx.doi.org/10.1155/2022/6988847.

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Because of numerous dormant application fields, wireless sensor networks (WSNs) have emerged as an important and novel area in radio and mobile computing research. These applications range from enclosed system configurations in the home and office to alfresco enlistment in an opponent’s landmass in a strategic flashpoint. Cognitive radio networks (CRNs) can be created by integrating radio link capabilities with network layer operations utilizing cognitive radios. The goal of CRN design is to optimize the general system operations to meet customer requirements at any location worldwide by much more efficiently addressing CRNs instead of simply connecting spectrum utilization. When compared to conventional radio networks, CRNs are more versatile and susceptible to wireless connections. Recent advancements in wireless communication have resulted in increasing spectrum scarcity. As a modern innovation, cognitive radio aims to tackle this challenge by proactively utilizing the spectrum. Because cognitive radio (CR) technology gives assailants additional possibilities than a normal wireless network, privacy in a CRN becomes a difficult challenge. We concentrate on examining the surveillance system at a societal level, in which both defense and monitoring are critical components in assuring the channel’s privacy. The current state of investigation into spectrum sensing and potential risks in cognitive radios is reviewed in this study.

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Zhang, Weipeng. "Design of Radio Frequency Link in Automatic Test System for Multimode Mobile Communication Base Station." International Journal of Bifurcation and Chaos 25, no. 14 (December 30, 2015): 1540032. http://dx.doi.org/10.1142/s0218127415400325.

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A modularized design for the radio frequency (RF) link in automatic test system of multimode mobile communication base station is presented, considering also the characteristics of wireless communication indices and composition of signals of base stations. The test link is divided into general module, time division duplex (TDD) module, module of spurious noise filter, module of downlink intermodulation, module of uplink intermodulation and uplink block module. The composition of modules and link functions are defined, and the interfaces of the general module and the module of spurious noise filter are described. Finally, the estimated gain budget of the test link is presented. It is verified by experiments that the system is reliable and the test efficiency is improved.

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Cawthen, Lisa, and Sarah Munks. "The design and testing of linen thread weak-links in brushtail possum radio-collars." Australian Mammalogy 33, no. 1 (2011): 33. http://dx.doi.org/10.1071/am10024.

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Linen thread was built into radio-collars as a weak-link to trial its effectiveness at ensuring that radio-collars did not remain indefinitely on animals if they were not recaptured. Eighty percent of collars with weak-links broke or degraded, resulting in the collars dropping off within 12–45 days. This method may be useful for short-term studies of some species of mammal that are difficult to recapture in order to remove collars.

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Afullo, T. J., and P. K. Odedina. "Effective earth radius factor measurement and modeling for radio link design in botswana." SAIEE Africa Research Journal 99, no. 3 (September 2008): 77–86. http://dx.doi.org/10.23919/saiee.2008.9485357.

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Emmanuel, Israel, Babatunde Adeyemi, and Kayode Adedayo. "Estimation of Refractivity Gradient and Geoclimatic Factor for Radio Link Design in Nigeria." Physical Science International Journal 19, no. 2 (August 20, 2018): 1–9. http://dx.doi.org/10.9734/psij/2018/34489.

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Visani, Davide, Giovanni Tartarini, Martin Nordal Petersen, Luigi Tarlazzi, and Pier Faccin. "Link Design Rules for Cost-Effective Short-Range Radio Over Multimode Fiber Systems." IEEE Transactions on Microwave Theory and Techniques 58, no. 11 (November 2010): 3144–53. http://dx.doi.org/10.1109/tmtt.2010.2074552.

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Acuña, Andres Valencia, Brian Meneses Claudio, and Alexi Delgado. "Design Radio Network Links to Provide Internet for Pupulation of San Andres de Llamellin-Ancash." International Journal of Emerging Technology and Advanced Engineering 12, no. 1 (January 16, 2022): 51–62. http://dx.doi.org/10.46338/ijetae0122_06.

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In recent years being able to have access to the internet has become a tool not only to be able to communicate in the distance but it is a great tool to be able to feed knowledge, it is because of them that children have a great educational utility and after this pandemic in Peru it was necessary to close schools, to be able to give remote classes or virtual classes. To solve the problem, we propose to be able to design a network of radio links whereby means of a base station of emission and reception, with an antenna of sectorial type and directional antennas to be able to realize a Point – Multipoint link which will be able to manage the quality of signal by means of a routing with functions of control of speeds for each connection of each home. It was the result that the connections of the radio link at an average distance from the coverage that the network had the signal was better and that the connections that were very far or close to the coverage area had complications, but despite this the connections were sufficient to be able to maintain the virtual classes that is what was planned. It is recommended that for a better connection and complete coverage it would be to reinforce the broadcast base with more sectoral antennas in the network. Keywords- Radio link, Point - Multipoint, Router, Download speed, Upload speed.

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S.Ibrahim, Amin, Abdelhalim Zekry, and Hussein A. Elsayed. "Design and Implementation of Radio Link Control as a Part of the WCDMA Radio Interface Protocols by using SDL." International Journal of Computer Applications 56, no. 16 (October 20, 2012): 40–47. http://dx.doi.org/10.5120/8979-3196.

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Pirinen, Pekka, Harri Pennanen, Ari Pouttu, Tommi Tuovinen, Nuutti Tervo, Petri Luoto, Antti Roivainen, Aarno Pärssinen, and Matti Latva-aho. "RF Driven 5G System Design for Centimeter Waves." Wireless Communications and Mobile Computing 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/7852896.

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5G system design is a complex process due to a great variety of applications and their diverse requirements. This article describes our experiences in developing a centimeter waves mobile broadband concept satisfying future capacity requirements. The first step in the process was the radio channel measurement campaign and statistical modeling. Then the link level design was performed tightly together with the radio frequency (RF) implementation requirements to allow as large scalability of the air interface as possible. We started the concept development at 10 GHz frequency band and during the project World Radiocommunication Conference 2015 selected somewhat higher frequencies as new candidates for 5G. Thus, the main learning was to gain insight of interdependencies of different phenomena and find feasible combinations of techniques and parameter combinations that might actually work in practice, not only in theory.

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Stępień, Jarosław, and Paweł Kabacik. "Radio link system solutions for mobile platforms operatingin sea environment." Zeszyty Naukowe Akademii Marynarki Wojennej 214, no. 3 (September 1, 2018): 75–86. http://dx.doi.org/10.2478/sjpna-2018-0020.

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Abstract In this paper radio link system solutions operating in 300 MHz — 3000 MHz range and sea environment were described. Solutions with more than one frequency and wave propagation models for horizontal not more than 50 km and far range were described. In the paper the results of actions taken design and construction solutions adopted were presented, aimed to contribute to ensure the reliability of the system, among other things, by implementing mechanisms for collecting and processing information. This solutions allow resources management to automatically adjust the transmission parameters configuration to the bitrate and range requirements. Available configurations can be extended with active part and electronic beam steering with one or more beams. The paper describes antenna systems ability of transmission parameters adaptation to get the range required.

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Harika, S., S. Nagarjuna, T. V. Naveen, G. Sanjay Harshanth, K. Ch. Sri Kavya, and Sarat K. Kotamraju. "Analysis of rain fade mitigation using site diversity technique in southern tropical region of India." International Journal of Engineering & Technology 7, no. 1.1 (December 21, 2017): 622. http://dx.doi.org/10.14419/ijet.v7i1.1.10790.

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In order to design a reliable earth to satellite microwave link at certain frequencies in tropical region due to multi propagation we come across fading which means variation of attenuation of a signal with time, geographical position and radio frequency. The radio waves propagating through the earth atmosphere is attenuated due to the presence of atmospheric particles such as water vapor, rain drops and the ice particles which absorb and scatter the radio waves and consequently degrade the performance of the microwave link and there is probability of loss of signal strength, to mitigate this problem Site Diversity Technique is used from the different Fade Mitigation Techniques. The analysis of Site Diversity Gain Model based on the measured rainfall data has been done.

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Yu-Chun, Cheng, Cheng-Fu Chou, Eric Hsiaokuang Wu, and Gen-Huey Chen. "A Cognitive TCP Design for a Cognitive Radio Network with an Unstable-Bandwidth Link." IEEE Transactions on Computers 64, no. 10 (October 1, 2015): 2730–3740. http://dx.doi.org/10.1109/tc.2014.2375186.

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Celik, G., A. Aitalieva, H. Celebi, and M. Uysal. "A software defined radio based data link design for VHF band wireless sensor networks." Physical Communication 30 (October 2018): 167–78. http://dx.doi.org/10.1016/j.phycom.2018.08.007.

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Keti, Faris, Salih M. Atroshey, and Jalil A. Hamadamin. "Design of a RoF fronthaul link based on optical generation of mm-waves for 5G C-RANs." Indonesian Journal of Electrical Engineering and Computer Science 30, no. 1 (April 1, 2023): 157. http://dx.doi.org/10.11591/ijeecs.v30.i1.pp157-166.

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In this paper, a cloud-radio access networks based (C-RANs) radio-over-fiber (RoF) system have been reported with the optical generation of 28 GHz and 57 GHz millimeter-wave using phase modulation and stimulated Brillouin scattering effect in optical fibers. As a result, a cost-effective system with improved performance is achieved by the proposed method. Based on the proposed scheme, a 28 GHz (licensed band) and 57 GHz (Un-licensed band) optical millimeter-waves are generated by simulation only using 14 GHz and 16 GHz radio frequency (RF) respectively. Because the performance of any optical transmission system is limited by the Q factor and the bit error rate (BER) and any input power of the laser into the fiber needs to be less than the Brillouin threshold in order to avoid the sharp degradation of the Q factor. Also, the Brillouin threshold for this study setup is determined which is around 6 dBm in the case of licensed band and 2 dBm in the case of unlicensed band. The simulation results show that the proposed scheme can provide 100 km single-mode fiber for 28 GHz and 25 km for 57 GHz with transmission rates of 10 Gbps for both of them. In addition, a stable millimeter-wave RoF link, high quality carriers, and a reduction in nonlinearity effects are achieved with the proposed scheme.

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Lv, Zhengnan, and Zhenghao Xi. "Radio Frequency Link and User Selection Algorithm for 5G Mobile Communication System." Complexity 2021 (May 18, 2021): 1–10. http://dx.doi.org/10.1155/2021/1976499.

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Based on the millimetre-wave time-domain channel detector, this paper conducts channel measurement and modelling for different scenarios and antenna types in typical frequency bands and thus carries out a study on the propagation characteristics of millimetre-wave channels in typical frequency bands and scenarios for 5G. The time-varying characteristics and modelling methods of millimetre-wave clusters are studied, and the time-varying channel simulation strategy and linear regression fitting method are used to establish the time-varying generation and extinction model of clusters by combining the measured data of 26 GHz large-scale antenna channels. The algorithm is based on the correlation dictionary and achieves the efficient and optimal selection of large-scale antenna arrays in the millimetre-wave band. A low-complexity multiuser hybrid precoding design scheme is proposed based on the wideband millimetre-wave large-scale Multiple-Input Multiple-Output (MIMO) system. The scheme aims to maximize the system spectral efficiency and introduces the net spectral efficiency as a bridge to decouple the analogy precoding design from the digital precoding design, thus significantly reducing the computational complexity. In the analogy precoding stage, a Hungarian algorithm-based beam assignment method is proposed to avoid beam conflicts and maximize the net spectral efficiency of the system; in the digital precoding stage, the equivalent channel matrix of each subcarrier is diagonalized to eliminate multiuser interference. Finally, the effectiveness of the scheme is verified by simulation. In this paper, we focus on the radio frequency (RF) link and user selection algorithm of 5G mobile communication system. Through the study of these two aspects, the RF link of our communication system has high stability and reliability, and through the study of the algorithm used for selection, our results also have a strong practical value.

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Ruiz-Avilés, J. M., S. Luna-Ramírez, M. Toril, F. Ruiz, I. de la Bandera, P. Muñoz, R. Barco, P. Lázaro, and V. Buenestado. "Design of a Computationally Efficient Dynamic System-Level Simulator for Enterprise LTE Femtocell Scenarios." Journal of Electrical and Computer Engineering 2012 (2012): 1–14. http://dx.doi.org/10.1155/2012/802606.

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In the context of Long-Term Evolution (LTE), the next generation mobile telecommunication network, femtocells are low-power base stations that efficiently provide coverage and capacity indoors. This paper presents a computationally efficient dynamic system-level LTE simulator for enterprise femtocell scenarios. The simulator includes specific mobility and traffic and propagation models for indoor environments. A physical layer abstraction is performed to predict link-layer performance with low computational cost. At link layer, two important functions are included to increase network capacity: Link Adaptation and Dynamic Scheduling. At network layer, other Radio Resource Management functionalities, such as Admission Control and Mobility Management, are also included. The resulting tool can be used to test and validate optimization algorithms in the context of Self-Organizing Networks (SON).

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Soni, Gaurav, and Manish Sharma. "Design and Analysis of Real-Time Applications Based on Software Designed Radio (SDR) Using 2×2 MIMO USRP 2920 and LabVIEW." ECS Transactions 107, no. 1 (April 24, 2022): 9709–18. http://dx.doi.org/10.1149/10701.9709ecst.

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The utilization of radio spectrum is becoming more necessary in light of recent advancements in wireless technologies. The available spectrum, on the other hand, is very constrained. In other words, Cognitive Radio (CR) is utilized to make the best use of the spectrum that is available. While unlicensed users should use CR technology to validate the spectrum before utilizing it, licensed users should always employ CR technology. Using dual antenna arrays to produce multiple-input multiple-output (MIMO) setups in wireless communication has sparked a great deal of interest in wireless technology. In this research work, M-ary QAM modulation scheme is used to investigate SDR based link using 2x2 MIMO system and implemented on USRP 2920 with the help of LabVIEW 2015. LabVIEW was used to operate the NI USRP 2920, a universal software radio peripheral. With the introduction of MIMO, greater use of limited spectrum may be accomplished by utilizing lower power usage. This article further explores the methods and techniques to design a real-time applications using concept of SDR and provides optimized data rate, link range using MIMO implementation. USRP 2920-based MIMO experimentation is used in this paper's findings (Universal Software Radio Peripheral). 7-inch vertical tri-band antennas are employed in the present research. Further open loop (OL) MIMO methods for mobile broadband radio access technologies like 4G and 5G are examined in this study. The proposed SDR setup based on 2x2 MIMO and USRP 2920 can be used for bandwidth efficient design and implementation of IoT based real-time applications.

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Surducan, V., M. Moudgill, G. Nacer, E. Surducan, P. Balzola, J. Glossner, S. Stanley, Meng Yu, and D. Iancu. "The Sandblaster Software-Defined Radio Platform for Mobile 4G Wireless Communications." International Journal of Digital Multimedia Broadcasting 2009 (2009): 1–9. http://dx.doi.org/10.1155/2009/384507.

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We present a tier 2 Software Defined-Radio platform (SDR), built around the latest Sandbridge Technologies' multithreaded Digital Signal Processor (DSP) SB3500, along with the description of major design steps taken to ensure the best radio link and computational performance. This SDR platform is capable of executing 4G wireless communication standards such as WiMAX Wave 2, WLAN 802.11 g, and LTE. Performance results for WiMAX are presented in the conclusion section.

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Gao, Shang, Shenfang Yuan, Lei Qiu, Biyun Ling, and Yuanqiang Ren. "A high-throughput multi-hop WSN for structural health monitoring." Journal of Vibroengineering 18, no. 2 (March 31, 2016): 781–800. http://dx.doi.org/10.21595/jve.2015.16551.

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Two major challenges with existing multi-hop WSNs used for structural health monitoring (SHM) are how to increase the data transmission rate (DTR) for large amounts of sampling data and enlarge the data transmission range without degrading link quality. To handle these issues, this paper proposes a new design method of a multi-hop WSN with multi-radio sink node (M-RSN) and double-radio relay node (D-RRN) which can increase the data transfer ability at the sink and extend the monitoring distance without degrading wireless link quality. Additionally, a tight scheduled approach and multi-radio time synchronization method are designed for the stable implementation of the proposed network. To evaluate the effectiveness and robustness of the proposed network designing method, experiments in outdoor environment and for aircraft composite wing boxes monitoring are carried out. The evaluation results have shown the advantages of the proposed methods.

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Huang, Xin-Lin, Gang Wang, Qing-Quan Sun, and Zhuo-Ran Cai. "QoS-Adaptive Routing Protocol Design for Multi-Hop Cognitive Radio Networks Considering Multi-Link Interference." International Journal of Sensors Wireless Communications and Controle 1, no. 2 (June 1, 2012): 88–92. http://dx.doi.org/10.2174/2210327911101020088.

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Huang, Xin-Lin, Gang Wang, Qing-Quan Sun, and Zhuo-Ran Cai. "QoS-Adaptive Routing Protocol Design for Multi-Hop Cognitive Radio Networks Considering Multi-Link Interference." International Journal of Sensors Wireless Communications and Control 1, no. 2 (July 25, 2012): 88–92. http://dx.doi.org/10.2174/2210328711101020088.

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Liu, Jiang, Wasinee Noonpakdee, and Shigeru Shimamoto. "Design and Performance Evaluation of OFDM-Based Wireless Services Employing Radio over Optical Wireless Link." International Journal of Wireless & Mobile Networks 3, no. 5 (October 30, 2011): 173–84. http://dx.doi.org/10.5121/ijwmn.2011.3514.

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Afullo, Thomas J. O. "RAINDROP SIZE DISTRIBUTION MODELING FOR RADIO LINK DESIGN ALONG THE EASTERN COAST OF SOUTH AFRICA." Progress In Electromagnetics Research B 34 (2011): 345–66. http://dx.doi.org/10.2528/pierb11082005.

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Thabit, Ahmed A. "Design and software implementation of radio frequency satellite link based on SDR under noisy channels." TELKOMNIKA (Telecommunication Computing Electronics and Control) 18, no. 6 (December 1, 2020): 2852. http://dx.doi.org/10.12928/telkomnika.v18i6.16130.

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Vijay, Ramya, and T. Rama Rao. "Penta-band Linear Tapered Feed Spiral Antenna Design and Radio Link Characterization for Vehicular Communications." Wireless Personal Communications 96, no. 2 (May 19, 2017): 3063–80. http://dx.doi.org/10.1007/s11277-017-4341-x.

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Jambhulkar, Nayan S., Dr Shailesh Kumar, and Dr Krushnadeo T. Belerao. "Design o f Wireless Ad Hoc System u sing Adaptive Multi Hop Link State Optimal Routing Protocol." International Journal of Innovative Technology and Exploring Engineering 11, no. 2 (December 30, 2021): 17–22. http://dx.doi.org/10.35940/ijitee.a9653.1211221.

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Now a days for the radio network communication multi-hop routing is used. This multi-hop routing technique covers larger coverage area. Therefore to reach at specific location data is transferred in form of packets from one node to other node. But for the transmission of radio signals over the large distance, large number of transreceivers are required and these transreceivers requires large power to operate. As a result, multi-hop routing can saves energy over separate routing. Therefore it is necessity to design a cost effective multi-hop routing technique for successful transmission of ratio packet data. In this paper a hop by hop adaptive link state optional routing (HALO) is explained. It is the first packet transmitting solution with hop by hop and link state routing, which reduces the cost of transporting data across a packet switch network[3]. The triple model is designed for multi hop packet routing. In this work each node of network iteratively and separately improves the small part of traffic bound. This algorithm finds the shortest path of specific location for every iteration and it is calculated by the marginal cost of the various links of network. The marginal link cost is used to calculate the shortest path between the node and the destination location. This marginal link cost is gathered from link state updates. The various networks changes are automatically identified by the adaptive method which is used in this paper. Due to this the exchange between the packets on wrong node is reduced over the overhead traffic. To validate these theoretical results the experimental evaluations and mathematical calculations are also reported in this work. Net beans java is the programmed use in this proposed project.

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G. Nsaif, Baseem, and Adheed H. Sallomi. "PATH LOSS MODELING FOR URBAN WIRLESS NETWORKS IN BAGHDAD." Journal of Engineering and Sustainable Development 25, Special (September 20, 2021): 1–7. http://dx.doi.org/10.31272/jeasd.conf.2.1.2.

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An accurate propagation modeling of radio waves propagation is very important task in cellular network design as it provides the detailed useful knowledge about the wireless channel environment characteristics. Theoretical or empirical RF propagation models provide the required useful information about the signal path loss and fading to evaluate the received signal level, the coverage area, and the outage probability in specific regions. This paper aimed to develop an empirical radio wave propagation model based on observations and sets of measurement data collected from different sites through drive test. These measurements are used to determine the received signal power at some locations to create an empirical radio wave propagation model that is suitable to be appropriate in cellular network accurate design and link budget prediction at the city of Baghdad.

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Malviya, Abhishek, and Sudhakar Pandey. "Clustering Based Dynamic Bandwidth Allocation in HC-RAN." International Journal on Recent and Innovation Trends in Computing and Communication 10, no. 11 (November 30, 2022): 121–30. http://dx.doi.org/10.17762/ijritcc.v10i11.5788.

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A wireless network is composed of several independent nodes or gadgets that communicate mutually through a wireless link. The most destructive challenge encountered in a wireless network is bandwidth allocation because it defines the amount the network will cost and how effectively it will function. The most cutting-edge network architecture in the present wireless communication system, cluster-based heterogeneous cloud radio access networks (HC-RANs), is what powers cloud computing in heterogeneous networks. In this research, we proposed an HC-RANs that may optimize energy consumption for wireless data transfer in the multi-hop device to device scenario. The proposed scheme offers bandwidth allocation in wireless environments where there are concerns about significant user mobility over the course of a given time. The above design, we used clustering with joint beam formation for the down link of heterogeneous cloud radio access network (HC-RAN), developed design to improved amount of FBS. Result outcomes helped in calculating Critical bandwidth usage (CBU).

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Perez-Ramos, Aldo-Eleazar, Salvador Villarreal-Reyes, Alejandro Galaviz-Mosqueda, and Catherine Lepers. "Design of Optical-Wireless IR-UWBoF Systems with Spectral Line Suppression Capabilities." Electronics 11, no. 21 (October 28, 2022): 3496. http://dx.doi.org/10.3390/electronics11213496.

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Impulse-Radio Ultra-Wide Band (IR-UWB) over Fiber (IR-UWBoF) has been proposed to interconnect IR-UWB-based deployments separated by hundreds of meters or even kilometers. IR-UWB transmissions must comply with spectral masks provided by radio spectrum regulatory agencies. The maximum transmit power of an IR-UWB signal is adversely affected by the presence of spectral lines in its Power Spectral Density (PSD). Thus, it is desirable that the PSD of signals generated by IR-UWBoF systems does not show spectral lines. Previous works have shown the feasibility of deploying of optical-wireless IR-UWBoF systems. However, most of these proposals report PSDs showing spectral lines. To the best of our knowledge, spectral line suppression has not been previously studied for optical-wireless IR-UWBoF systems. This work shows the design and implementation of optical-wireless IR-UWBoF systems generating signals with Spectral Line-Free (SLF) PSDs. The proposal considers the use the use of a specifically designed convolutional code combined with Binary Phase Shift Keying (BPSK) or Quaternary Biorthogonal Pulse Position Modulation (Q-BOPPM) to provide a SLF PSD in IR-UWBoF systems. A testbed consisting of 30 km of single-mode optical fiber (SMF) concatenated to a 20 cm wireless link was physically implemented. The results show that a SLF PSD is achieved for both the optical and the wireless transmissions, even when the binary data source feeding the system is not perfectly random.

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Biswas, Moyuresh, Michael R. Frater, and Michael Ryan. "Determination of hub port attenuation satisfying radio link path losses for hardware emulation." SIMULATION 87, no. 6 (July 2010): 499–511. http://dx.doi.org/10.1177/0037549710373601.

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Riurean, Simona. "Design and Evaluation of Visible Light Wireless Data Communication Models." Journal of Digital Science 2, no. 2 (December 29, 2020): 3–13. http://dx.doi.org/10.33847/2686-8296.2.2_1.

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The technologies based on the radio frequency used for wireless transmission indoor are more congested than ever these days, therefore several wireless communication alternatives are intensively searched. Some most promising technologies are based on the optical part of the electromagnetic spectrum. The benefits and drawbacks in optical wireless data communication models design are presented in this work. The key characteristics of the VLC systems are briefly discussed, as well. Some models developed for wireless data transfer in visible light communication and infrared are presented, and their operation related to the data rate and the length of the optical link, are briefly compared.

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Li, Xue Jun, Peng Wang, and Xin Huang. "Design of Data Acquisition System in MES Based on RFID." Advanced Materials Research 201-203 (February 2011): 852–56. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.852.

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Manufacturing execution system is the link in the process of enterprise implementation information integration.The application of Radio Frequency Identification technology is important to implement the data collection function of MES. Speculation against the low efficiency, poor in real time, and low security function for data acquisition in a motor manufacturer, established data acquisition system in MES based on RFID,discussed the data collection process, designed structure of the system in detail，analyzed the function requirements,provide anti-collision algorithm to avoid data collection of the label which may be used in the system implementation,finally discussed the principle of coding.

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Nasrul. "Link Path Analysis Komunikasi Gelombang Mikro Topologi Ring Area Kota Padang." Jurnal Ilmiah Poli Rekayasa 12, no. 2 (April 17, 2017): 54. http://dx.doi.org/10.30630/jipr.12.2.40.

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The development of the telecommunication the rapidly and the increased the need for information , trigger the increasing number of system project communication and discharging radio frequency .This needs to a design and planning ripe to make the existing system can work optimal without any disturbance of discharging frequency two closely ( interference ) .At the end of this task using software aplication pathloss 5.0 to do design as well as performing calculations link budged in observance of some other factors such as the position of site, the height of the contours of, the condition of propagation , and device used .The end of this duty also using visual basic 2010 to assist in performing calculations link budged.In the design uses the topology of ring from the area of the Padang city was used in 6 ( six ) link , first bypass to tabing at a distance of link 3,59 km , tabing to minang plaza at a distance of link 1,87 km , minang plaza to hotel pangeran at a distance of link 2,48 km , hotel pangeran to simpang anduriang at a distance link 4,05 km , simpang anduriang tobalai baru at a distance of link 2,31 km and balai baru to bypass at a distance 3,75 km.

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HALUŠKA, Renát, and Ľuboš OVSENÍK. "EXAMPLE OF SWITCHING HYBRID FSO/RF SYSTEMS." Acta Electrotechnica et Informatica 20, no. 4 (January 21, 2021): 27–31. http://dx.doi.org/10.15546/aeei-2020-0022.

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This article addresses the issue of optical communication with Free Space Optics (FSO) and its use. The article deals with the design and construction of a monitoring system designed for the collection and processing of data characterizing the nature of conditions along the transmission path of a hybrid FSO system with a radio communication link. Due to the vulnerability of the FSO transmission channel to weather conditions, it is necessary to predict the strength of the received signal and switch to a backup line based on machine learning using decision trees.

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Journal articles on the topic 'Radio link design'

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