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Journal articles on the topic 'Multi-radio'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 June 2025

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1

Kim, Jong-Duk, and Toung-Kil Kim. "A Study of Multi-Channel Internet Radio Platform." Journal of the Korean Institute of Information and Communication Engineering 14, no. 7 (July 30, 2010): 1723–28. http://dx.doi.org/10.6109/jkiice.2010.14.7.1723.

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2

Han, Bin, Ying Luo, Min Zeng, and Hong Jiang. "Spectrum-Efficient Resource Allocation in Multi-Radio Multi-Hop Cognitive Radio Networks." Sensors 19, no. 20 (October 16, 2019): 4493. http://dx.doi.org/10.3390/s19204493.

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The multi-hop cognitive radio network (CRN) has attracted much attention in industry and academia because of its seamless wireless coverage by forming multi-hop links and high spectrum utilization of cognitive radio (CR) technology. Using multi-slot statistical spectrum status information (SSI), this work investigates the average spectrum efficiency (SE) of a multi-radio multi-hop (MRMH) CRN where each hop is permitted to use different spectra and long-distance hops can reuse the same idle primary user (PU) spectrum. Faced with the modeled SE problem, which is a complex non-convex fractional mixed integer nonlinear programming (MINLP) problem, the optimal spectrum and power allocation for multi-hop links in multi-slot and multi-channel scenarios can be obtained with the proposed successive multi-step convex approximation scheme (SMCA). As shown through computational complexity and simulation analysis, SMCA can obtain an approximate lower bound of the optimal solution for the modeled SE problem with a lower computational cost. Furthermore, some potential relationships between network performance and spectrum idle rate can be easily discussed with SMCA, which can provide some sensible deployment strategies for the MRMH CRN in future multi-slot scenarios.

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3

Chen, Lin, Kaigui Bian, Xiaohu Ge, Wei Chen, Qingsong Ai, and Kehao Wang. "Multi-radio channel rendezvous in cognitive radio networks." IET Communications 13, no. 10 (June 25, 2019): 1433–42. http://dx.doi.org/10.1049/iet-com.2018.5956.

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4

Khan, Tanvir Ahmed, and A. B. M. Alim Al Islam. "Enhancing throughput in multi-radio cognitive radio networks." Wireless Networks 25, no. 7 (August 5, 2019): 4383–402. http://dx.doi.org/10.1007/s11276-019-02103-6.

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5

Wei, Liu. "The Analysis of Single-Radio Mode, Dual-Radio Mode and Multi-Radio Mode WMN’s Capacity." Applied Mechanics and Materials 182-183 (June 2012): 2045–49. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.2045.

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WMN is the abbreviations of Wireless mesh networks. Along with the evolution of WMN, there appears single-radio mode WMN ,dual-radio mode WMN ,multi-radio mode WMN and their mixed mode WMN. Single-radio mode WMN network has the lowest capacity and the lowest cost, dual-radio and multi-radio mode WMN are better than single-radio mode WMN, multi-radio mode WMN has the largest bandwidth and flexibility, and has obtained the large-scale application.

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6

Yaskiv, Volodymyr, and Anna Yaskiv. "Multi-channel switching magamp power converter for radio recieving devices." Computational Problems of Electrical Engineering 13, no. 1 (December 5, 2023): 39–42. http://dx.doi.org/10.23939/jcpee2023.01.039.

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Development of high-quality energy supply of radio receiving devices is an urgent task. The article discusses the methods of designing high-frequency multi-channel power converters based on high-frequency magnetic amplifiers, the magnetic cores of which are made of an amorphous alloy with a rectangular hysteresis loop. Their significant advantages when powering radio receiving devices are the high quality of the output voltages and the low level of electromagnetic interference, both radiated and conductive. At the same time, they have a higher level of dynamic characteristics, reliability and efficiency while reducing their topological complexity and cost. In addition, it allows the implementation of multi-channel power converters with equivalent and independent output channels in a wide range of output powers. The paper presents the implementation of such a converter for powering radio receiving devices.

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7

Mack, K. H., U. Klein, C. P. O'Dea, and A. G. Willis. "Multi-frequency radio continuum mapping of giant radio galaxies." Astronomy and Astrophysics Supplement Series 123, no. 3 (June 1997): 423–44. http://dx.doi.org/10.1051/aas:1997166.

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8

Fokin, G. "Modeling multi-beam radio channel." Telecom IT 9, no. 1 (March 31, 2021): 59–78. http://dx.doi.org/10.31854/2307-1303-2021-9-1-59-78.

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In this work, a simulation model of a radio channel with fading is implemented for use  in research of the multipath channel, as well as for assessing the noise immunity of transmission, recep-tion and processing systems in modern and future mobile communication and radio access networks. Formalization of mathematical models of a radio channel with fading, including the Rayleigh amplitude distribution, uniform phase distribution and a given Doppler spectrum, made it possible to visualize  the time-frequency and probabilistic characteristics of a radio channel with fading. The implementation  of the procedures for delaying and attenuating copies of signals in a multipath radio channel made it pos-sible to reproduce scenarios of flat and frequency selective fading, which are widely used in practice in assessing the noise immunity of signals with given frequency and time characteristics.

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9

Orlov, V. V., O. A. Lytvynenko, and V. V, Galanin. "MULTI-FREQUENCY RADIO INTERFEROMETRY ALGORITHM." Odessa Astronomical Publications 32 (October 27, 2019): 100–102. http://dx.doi.org/10.18524/1810-4215.2019.32.181776.

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10

Kloeck, Clemens, Holger Jaekel, and Friedrich Jondral. "Multi-Agent Radio Resource Allocation." Mobile Networks and Applications 11, no. 6 (December 2006): 813–24. http://dx.doi.org/10.1007/s11036-006-0051-4.

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11

Sigle, Rolf, Oliver Blume, Lutz Ewe, and Wieslawa Wajda. "Multi-radio infrastructure for 4G." Bell Labs Technical Journal 13, no. 4 (February 25, 2009): 257–76. http://dx.doi.org/10.1002/bltj.20348.

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12

Krainy, V., and A. Semenov. "Creation of 3-D Object Radio Images Using Multi-Frequency Multi-static Radio-hologram." Radiooptics Scientific Journal 16, no. 05 (September 3, 2016): 1–10. http://dx.doi.org/10.7463/rdopt.0516.0848109.

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13

Zhong, Xiaoxiong, Yang Qin, and Li Li. "Capacity Analysis in Multi-Radio Multi-Channel Cognitive Radio Networks: A Small World Perspective." Wireless Personal Communications 79, no. 3 (August 3, 2014): 2209–25. http://dx.doi.org/10.1007/s11277-014-1981-y.

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14

Bhutto, Zuhaibuddin, Jun-Hyuk Park, and Wonyong Yoon. "Characterizing Multi-radio Energy Consumption in Cellular/Wi-Fi Smartphones." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (December 1, 2016): 2920. http://dx.doi.org/10.11591/ijece.v6i6.11916.

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<p>Cellular networks evolved to meet the ever increasing traffic demand by way of offloading mobile traffic to Wi-Fi network elements. Exploiting multi-radio interfaces on a smartphone has recently been examined with regards to heterogeneous bandwidth aggregation and radio switching. However, how a smartphone consumes its energy in driving cellular and Wi-Fi multi-radio interfaces, is not well understood. In this paper, we revealed the energy consumption behavior of 3G cellular and Wi-Fi multi-radio operations of a smartphone. We modified smartphone’s firmware to enable multi-radios operations simultaneously and we performed extensive measurements of multi-radio energy consumption in a real commercial network. From the measured data set, we established a realistic multi-radio energy consumption model and it gave 98% stability from the derived coefficients.</p>

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15

Bhutto, Zuhaibuddin, Jun-Hyuk Park, and Wonyong Yoon. "Characterizing Multi-radio Energy Consumption in Cellular/Wi-Fi Smartphones." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (December 1, 2016): 2920. http://dx.doi.org/10.11591/ijece.v6i6.pp2920-2930.

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<p>Cellular networks evolved to meet the ever increasing traffic demand by way of offloading mobile traffic to Wi-Fi network elements. Exploiting multi-radio interfaces on a smartphone has recently been examined with regards to heterogeneous bandwidth aggregation and radio switching. However, how a smartphone consumes its energy in driving cellular and Wi-Fi multi-radio interfaces, is not well understood. In this paper, we revealed the energy consumption behavior of 3G cellular and Wi-Fi multi-radio operations of a smartphone. We modified smartphone’s firmware to enable multi-radios operations simultaneously and we performed extensive measurements of multi-radio energy consumption in a real commercial network. From the measured data set, we established a realistic multi-radio energy consumption model and it gave 98% stability from the derived coefficients.</p>

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16

Nonchev, Stanislav, and Mikko Valkama. "ADVANCED RADIO RESOURCE MANAGEMENT FOR MULTI ANTENNA PACKET RADIO SYSTEMS." International Journal of Wireless & Mobile Networks 2, no. 2 (May 10, 2010): 1–14. http://dx.doi.org/10.5121/ijwmn.2010.2201.

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17

Lin, Tzu-Hsiang, Guu-Chang Yang, and Wing C. Kwong. "A Homogeneous Multi-Radio Rendezvous Algorithm for Cognitive Radio Networks." IEEE Communications Letters 23, no. 4 (April 2019): 736–39. http://dx.doi.org/10.1109/lcomm.2019.2903458.

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18

Deng, Zhongliang, Xiaoyi Yu, Wenliang Lin, Ke Wang, Hao Liu, Lei Gu, Yang Liu, and Xiaojuan Ma. "A Multi-Beam Satellite Cooperative Transmission Scheme Based on Resources Optimization and Packets Segmentation." Electronics 10, no. 22 (November 18, 2021): 2841. http://dx.doi.org/10.3390/electronics10222841.

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Multi-beam satellite communication systems are promising architectures in the future. A packet is transmitted by multi-satellite and multi-beam cooperatively, which can provide efficient spectrum utilization, improve system throughput, and guarantee Quality of Services (QoS). In multi-beam satellite communication systems, multi-layer and multi-dimensional radio resources change dynamically, which leads to the discontinuity of optimal resources and the lack of mapping balance between packets and radio resources. To deal with these problems, we propose a cross-layer and cross-dimension radio resources optimization model based on the weighted discrete firefly algorithm and an adaptive packet segmentation scheme based on the irregular gradient algorithm. The cross-layer and cross-dimension radio resources optimization model based on the weighted discrete firefly algorithm simulates cross-layer and cross-dimension optimization for the high-dynamic and multi-dimensional radio resources by considering the channel state information (CSI) and QoS in the multi-beam satellite communication system. The optimal resources are taken as the weight of irregular gradient algorithm to segment packets and map packets to radio resources, which can realize the mapping balance between packets and radio resources and ensure the efficiency and reliability of communication. The simulations show that the new transmission scheme improves the normalized system throughput and user satisfaction index by 18.7% and 6.2%, respectively.

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19

Zeng, Kai, Zhenyu Yang, and Wenjing Lou. "Opportunistic Routing in Multi-Radio Multi-Channel Multi-Hop Wireless Networks." IEEE Transactions on Wireless Communications 9, no. 11 (November 2010): 3512–21. http://dx.doi.org/10.1109/twc.2010.092410.100118.

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20

Campolo, Claudia, Lin Cheng, Christoph Sommer, and Hsin-Mu (Michael) Tsai. "Special Issue on Multi-radio, Multi-technology, Multi-system Vehicular Communications." Computer Communications 93 (November 2016): 1–2. http://dx.doi.org/10.1016/j.comcom.2016.09.003.

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21

Shue, Ming‐Jeng. "Multi‐functional radio/wire stethoscopic apparatus." Journal of the Acoustical Society of America 84, no. 5 (November 1988): 1968. http://dx.doi.org/10.1121/1.397079.

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22

Sidi, Moshe, and Israel Cidon. "A Multi-station packet-radio network." Performance Evaluation 8, no. 1 (February 1988): 65–72. http://dx.doi.org/10.1016/0166-5316(88)90013-2.

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23

Miu, Allen, Hari Balakrishnan, and Can Emre Koksal. "Multi-radio diversity in wireless networks." Wireless Networks 13, no. 6 (October 23, 2006): 779–98. http://dx.doi.org/10.1007/s11276-006-9854-2.

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24

Rando, Gaetano. "Multi-Lingual Radio in South Australia." Media Information Australia 35, no. 1 (February 1985): 41–48. http://dx.doi.org/10.1177/1329878x8503500108.

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25

Ostapchuk, Viktor, Oleg Sova, Andrii Shyshatskyi, and Olexander Harashchuk. "DEVELOPMENT OF A MATHEMATICAL MODEL OF THE FUNCTIONING OF MULTI-ANTENNA RADIO COMMUNICATIONS WITH SPECTRALLY EFFECTIVE SIGNALS UNDER THE INFLUENCE OF DESTABILIZING FACTORS." ScienceRise 4 (August 31, 2020): 40–45. http://dx.doi.org/10.21303/2313-8416.2020.001393.

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The necessity of developing a mathematical model for the functioning of multi-antenna radio communication facilities with spectrally effective signals under the influence of destabilizing factors has been substantiated. The results of the study of the influence of destabilizing factors on the multi-antenna systems with spectrally effective signals are presented. New analytical dependences have been obtained, which make it possible to calculate the effect of destabilizing factors on the efficiency of multi-antenna system with spectrally effective signals. Object of research: development of a mathematical model of the functioning of multi-antenna radio communication facilities with spectrally effective signals under the influence of destabilizing factors. Investigated problem: taking into account additional destabilizing factors on the multi-antenna of a radio communication facility with spectrally effective signals. Main scientific results: when transmitting information in multi-antenna radio communication systems with spectrally effective signals, the following are taken into account: Type of parameters of deliberate interference, type and parameters of deliberate fading, type and parameters of security code structures, phase jitter, slope of the constellation matrix, Intersymbol interference, high mobility of objects (transmitter and receiver), the number of receiving and transmitting antennas, the number of subcarriers in the antenna channel. It has been established that taking into account all the parameters in the system makes it possible to assess the state of the channel, to develop measures to reduce the negative influence of destabilizing factors on the noise immunity of multi-antenna systems. A review of the practical use of research results: radio communication facilities with programmable architecture. Innovative technologies product: technology for substantiating the architecture of transceivers, software for programmable radio equipment, which can increase the noise immunity of radio communications, taking into account additional destabilizing factors and software for radio monitoring equipment. Overview of an innovative technological product: programmable radios, software for radio communications.

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26

Islam, Md Tahidul, Sithamparanathan Kandeepan, and Robin J. Evans. "Multi-Radio Based Rendezvous Technique for Heterogeneous Cognitive Radio Sensor Network." Sensors 21, no. 9 (April 24, 2021): 2997. http://dx.doi.org/10.3390/s21092997.

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In a distributed cognitive radio (CR) sensor network, transmission and reception on vacant channels require cognitive radio nodes to achieve rendezvous. Because of the lack of adequate assistance from the network environment, such as the central controller and other nodes, assisted rendezvous for distributed CR is inefficient in a dynamic network. As a result, non-assisted blind rendezvous, which is unaware of its counterpart node, has recently led to a lot of interest in the research arena. In this paper, we study a channel rendezvous method based on prime number theory and propose a new multi-radio-based technique for non-assisted rendezvous with the blind and heterogeneous condition. The required time and the optimal number of radios for the guaranteed rendezvous are calculated using probability-based measurement. Analytical expressions for probabilistic guaranteed rendezvous conditions are derived and verified by Monte Carlo simulation. In addition, the maximum time to rendezvous (MTTR) is derived in closed form using statistical and probabilistic analysis. Under different channel conditions, our proposed solution leads to a substantial time reduction for guaranteed rendezvous. For the sake of over-performance of our proposed system, the simulation outcome is compared to a recently proposed heterogeneous and blind rendezvous method. The Matlab simulation results show that our proposed system’s MTTR gains range from 11% to over 95% for various parametric values of the system model.

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27

Shin, Jung-Chae, Seung-Hwa Min, Ho-Shin Cho, and Youn-Seon Jang. "Efficient Radio Resource Allocation for Cognitive Radio Based Multi-hop Systems." Journal of Korean Institute of Communications and Information Sciences 37, no. 5A (May 30, 2012): 325–38. http://dx.doi.org/10.7840/kics.2012.37a.5.325.

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28

Chao, Chih-Min, Chia-Tsun Chen, and Hsin-Chung Huang. "An adjustable channel hopping algorithm for multi-radio cognitive radio networks." Computer Networks 170 (April 2020): 107107. http://dx.doi.org/10.1016/j.comnet.2020.107107.

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29

Li, Ming, Sergio Salinas, Pan Li, Xiaoxia Huang, Yuguang Fang, and Savo Glisic. "Optimal Scheduling for Multi-Radio Multi-Channel Multi-Hop Cognitive Cellular Networks." IEEE Transactions on Mobile Computing 14, no. 1 (January 1, 2015): 139–54. http://dx.doi.org/10.1109/tmc.2014.2314107.

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30

Diandian, Zeng. "Multi-dimensional Soundscape of Radio in Egypt." ASIAN-EUROPEAN MUSIC RESEARCH JOURNAL 12 (December 13, 2023): 101–8. http://dx.doi.org/10.30819/aemr.12-9.

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Egyptian radio broadcasting has always been strictly controlled by the government since the 1920s. Composed of two sections, this essay aims to explore the multi-dimensional radio soundscape in Egypt and how radio and loudspeakers have been used by the government to serve political goals in both religious and secular activities. The first section centres on Umm Kulthum and how she took advantage of the burgeoning radio to spread her fame and reach out to the mass audience in the Arab world. I also examine how the Egyptian government utilised radio to achieve its political goal of pan-Arabism. The second section discusses the usage of radio and loudspeakers for religious activities, including the Qur’anic recitation and the “call to prayer.” I analyse how governmental control of radio technology affected daily religious events and people’s social identities.

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31

P.L, Shreenidhi, Ranganath H R, Puttamadappa C, and Basavaraju T G. "Dynamic Channel Allocation Technique for Distributed Multi-radio Multichannel Multi-path Routing Protocol in Wireless Mesh Networks." International Journal of Engineering Research 3, no. 12 (December 1, 2014): 730–36. http://dx.doi.org/10.17950/ijer/v3s12/1205.

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32

Song, Yigeng. "A review of multi-load radio energy transmission." Theoretical and Natural Science 18, no. 1 (December 8, 2023): 238–45. http://dx.doi.org/10.54254/2753-8818/18/20230421.

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In recent years, the multi-load magnetic coupling radio energy transmission technology has become a research focus, among which the system topology is a key research content, which determines whether the technology can meet the needs of different application scenarios. This paper uses literature analysis to sort out and analyze the topology of multi-load magnetically coupled radio energy transmission system An effective classification method is proposed, which is helpful to provide a reference for the related research on the topology of multi-load WPT systems. Firstly, the topologies of multi-load magnetically coupled radio energy transmission systems are classified. Then, the working principles, advantages and disadvantages of the main topologies are introduced. Finally, the problems faced by the topology of multi-load magnetically coupled radio energy transmission system are presented, and the future development trend is prospected.

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33

Sasikumar, Silpa, and Preeti Kharb. "Looking at radio-quiet AGN with radio polarimetry." Acta Astrophysica Taurica 3, no. 1 (March 14, 2022): 17–22. http://dx.doi.org/10.31059/aat.vol3.iss1.pp17-22.

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The dominant radio emission mechanism in radio-quiet quasars (RQQs) is an open question. Primary contenders include: low-power radio jets, winds, star-formation and coronal emission. Our work suggests that radio polarization and emission-line studies can help to distinguish between these scenarios and determine the primary contributor. Our multi-frequency, multi-scale radio polarization study has revealed a composite jet and "wind" radio outflow in the radio-intermediate quasar, III Zw 2, as well as in the BALQSO, Mrk 231. Our radio polarization study in conjunction with the [O III] emission-line study of five type 2 RQQs have provided insights on the interplay of jets/winds and emission-line gas. These sources reveal an anti-correlation between polarized radio emission and [O III] emission. This is similar to that observed in some radio-loud active galactic nuclei (AGN) in the literature and suggests that the radio emission could be depolarized by the emission-line gas. Overall, our work suggests that a close interaction between the radio outflow and the surrounding gaseous environment is likely to be responsible for their stunted form in RQ and RI AGN.

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34

Arfyanti, Ita, Yunita Yunita, and Dwi Andrian Nurbawono. "SISTEM PENDUKUNG KEPUTUSAN PENERIMAAN PENYIAR RADIO PADA RADIO KPFM MENGGUNAKAN METODE SMART (SIMPLE MULTIATTRIBUTE RATING TECHIQUE)." Jurnal Informatika Wicida 9, no. 2 (July 1, 2020): 39–46. http://dx.doi.org/10.46984/inf-wcd.1235.

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Sistem Pendukung Keputusan (SPK) adalah sistem yang dapat membantu seseorang dalam mengambil keputusan yang akurat dan tepat sasaran. Banyak permasalahan yang dapat diselesaikan dengan menggunakan SPK, salah satunya adalah Penerimaan Penyiar Radio Pada Radio KPFM dengan menggunakan bantuan metode SMART (Simple Multi Attribute Rating Technique).Tujuan dari penelitian ini adalah untuk menghasilkan Sistem Pendukung Keputusan Penerimaan Penyiar Radio Pada Radio KPFM dengan menggunakan bantuan metode SMART (Simple Multi Attribute Rating Technique) dengan harapan seleksi penyiar radio dilakukan secara obyektif. Dengan menggunakan bahasa pemrograman PHP dan database yang digunakan yaitu MySql. Dalam penelitian ini, teknik pengumpulan data yang digunakan adalah studi pustaka, observasi dan wawancaraHasil dari penelitian ini adalah dibuatnya sistem pendukung keputusan untuk melakukan keputusan penyiar radio yang diterima, dan tidak diterima untuk menjadi penyiar radio. Pengguna dapat menginputkan data penyiar, data kriteria dan data sub kriteria. Kemudian sistem akan mencari solusi dengan metode SMART (Simple Multi Attribute Rating Technique). Setelah keputusan didapatkan, maka sistem akan menampilkan keputusan tersebut.

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35

Farzinvash, Leili, and Mehdi Dehghan. "Multi-rate multicast routing in multi-gateway multi-channel multi-radio wireless mesh networks." Journal of Network and Computer Applications 40 (April 2014): 46–60. http://dx.doi.org/10.1016/j.jnca.2013.08.009.

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36

Kim, Heyone, Junhak Lee, Sang Heon Oh, Hyoungmin So, and Dong-Hwan Hwang. "Multi-Radio Integrated Navigation System M&S Software Design for GNSS Backup under Navigation Warfare." Electronics 8, no. 2 (February 6, 2019): 188. http://dx.doi.org/10.3390/electronics8020188.

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To avoid degradation of navigation performance in the navigation warfare environment, the multi-radio integrated navigation system can be used, in which all available radio navigation systems are integrated to back up Global Navigation Satellite System (GNSS) when the GNSS is not available. Before real-time multi-radio integrated navigation systems are deployed, time and cost can be saved when the modeling and simulation (M&S) software is used in the performance evaluation. When the multi-radio integrated navigation system M&S is comprised of independent function modules, it is easy to modify and/or to replace the function modules. In this paper, the M&S software design method was proposed for multi-radio integrated navigation systems as a GNSS backup under the navigation warfare. The M&S software in the proposed design method consists of a message broker and function modules. All the messages were transferred through the message broker in order to be exchanged between the function modules. The function modules in the M&S software were independently operated due to the message broker. A message broker-based M&S software was designed for a multi-radio integrated navigation system. In order to show the feasibility of the proposed design method, the M&S software was implemented for Global Positioning System (GPS), Korean Navigation Satellite System (KNSS), enhanced Long range navigation (eLoran), Loran-C, and Distance Measuring Equipment/Very high-frequency Omnidirectional Radio range (DME/VOR). The usefulness of the proposed design method was shown by checking the accuracy and availability of the GPS only navigation and the multi-radio integrated navigation system under the attack of jamming to GPS.

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37

Viktor, Ostapchuk, Sova Oleg, Shyshatskyi Andrii, and Harashchuk Olexander. "DEVELOPMENT OF A MATHEMATICAL MODEL OF THE FUNCTIONING OF MULTI-ANTENNA RADIO COMMUNICATIONS WITH SPECTRALLY EFFECTIVE SIGNALS UNDER THE INFLUENCE OF DESTABILIZING FACTORS." ScienceRise, no. 4 (August 31, 2020): 40–45. https://doi.org/10.21303/2313-8416.2020.001393.

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The necessity of developing a mathematical model for the functioning of multi-antenna radio communication facilities with spectrally effective signals under the influence of destabilizing factors has been substantiated. The results of the study of the influence of destabilizing factors on the multi-antenna systems with spectrally effective signals are presented. New analytical dependences have been obtained, which make it possible to calculate the effect of destabilizing factors on the efficiency of multi-antenna system with spectrally effective signals. <strong>Object of research:</strong> development of a mathematical model of the functioning of multi-antenna radio communication facilities with spectrally effective signals under the influence of destabilizing factors. <strong>Investigated problem:</strong> taking into account additional destabilizing factors on the multi-antenna of a radio communication facility with spectrally effective signals. <strong>Main scientific results:</strong> when transmitting information in multi-antenna radio communication systems with spectrally effective signals, the following are taken into account: Type of parameters of deliberate interference, type and parameters of deliberate fading, type and parameters of security code structures, phase jitter, slope of the constellation matrix, Intersymbol interference, high mobility of objects (transmitter and receiver), the number of receiving and transmitting antennas, the number of subcarriers in the antenna channel. It has been established that taking into account all the parameters in the system makes it possible to assess the state of the channel, to develop measures to reduce the negative influence of destabilizing factors on the noise immunity of multi-antenna systems. <strong>A review of the practical use of research results:</strong> radio communication facilities with programmable architecture. <strong>Innovative technologies product:</strong> technology for substantiating the architecture of transceivers, software for programmable radio equipment, which can increase the noise immunity of radio communications, taking into account additional destabilizing factors and software for radio monitoring equipment. <strong>Overview of an innovative technological product:</strong> programmable radios, software for radio communications.

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38

Son, Jae Hoon, Heyone Kim, Sang Heon Oh, Hyoungmin So, and Dong-Hwan Hwang. "Multi-Thread Based Design of Navigation Algorithm Module in Multi Radio Integrated Navigation System M&S Software." E3S Web of Conferences 94 (2019): 01009. http://dx.doi.org/10.1051/e3sconf/20199401009.

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A multi-thread based navigation algorithm module is designed in a multi radio integrated navigation system modeling and simulation software in order to efficiently use resources in the software platform of the modeling and simulation software. By adopting the multi-thread architecture, features of navigation algorithms and concurrency of the algorisms can be easily included in the navigation algorithm module. In order to show the usefulness of the multi thread based navigation algorithm module design, a navigation algorithm module in the multi-radio integrated navigation system for GPS, KNSS, Loran-C, eLoran and DME/VOR is implemented in C++ under the Windows operating system. The implementation results show that the thread based design can be useful in the development of multi radio integrated navigation systems.

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39

Pan, Cunhua, Jiangzhou Wang, Wence Zhang, Bo Du, and Ming Chen. "Power Minimization in Multi-Band Multi-Antenna Cognitive Radio Networks." IEEE Transactions on Wireless Communications 13, no. 9 (September 2014): 5056–69. http://dx.doi.org/10.1109/twc.2014.2329296.

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Liu, Tehuang, and Wanjiun Liao. "Multicast Routing in Multi-Radio Multi-Channel Wireless Mesh Networks." IEEE Transactions on Wireless Communications 9, no. 10 (October 2010): 3031–39. http://dx.doi.org/10.1109/twc.2010.082310.090568.

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Song, Min, Jun Wang, Kai Xing, and E. Park. "Interference-aware broadcasting in multi-radio multi-channel mesh networks." IEEE Transactions on Wireless Communications 7, no. 12 (December 2008): 5473–81. http://dx.doi.org/10.1109/t-wc.2008.071433.

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Mao, XuFei, Xiang-Yang Li, and GuoJun Dai. "Flow admission control for multi-channel multi-radio wireless networks." Wireless Networks 17, no. 3 (December 25, 2010): 779–96. http://dx.doi.org/10.1007/s11276-010-0314-7.

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Varatharajan, R., Angelin Peace Preethi, Gunasekaran Manogaran, Priyan Malarvizhi Kumar, and Revathi Sundarasekar. "Stealthy attack detection in multi-channel multi-radio wireless networks." Multimedia Tools and Applications 77, no. 14 (March 28, 2018): 18503–26. http://dx.doi.org/10.1007/s11042-018-5866-z.

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Alabady, Salah Abdulghani, and Mohd Fadzli Mohd Salleh. "Wireless Network Coding for Multi Radio Multi Channel Mesh Networks." Wireless Personal Communications 106, no. 3 (March 9, 2019): 1629–47. http://dx.doi.org/10.1007/s11277-019-06233-0.

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Wan, Pengjun, and Zhi-Guo Wan. "Maximizing Networking Capacity in Multi-Channel Multi-Radio Wireless Networks." Journal of Computer Science and Technology 29, no. 5 (September 2014): 901–9. http://dx.doi.org/10.1007/s11390-014-1477-y.

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Vardoulaki, E., E. F. Jiménez Andrade, A. Karim, M. Novak, S. K. Leslie, K. Tisanić, V. Smolčić, et al. "A closer look at the deep radio sky: Multi-component radio sources at 3 GHz VLA-COSMOS." Astronomy & Astrophysics 627 (July 2019): A142. http://dx.doi.org/10.1051/0004-6361/201832982.

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Context. Given the unprecedented depth achieved in current large radio surveys, we are starting to probe populations of radio sources that have not been studied in the past. However, identifying and categorising these objects, differing in size, shape and physical properties, is becoming a more difficult task. Aims. In this data paper we present and characterise the multi-component radio sources identified in the VLA-COSMOS Large Project at 3 GHz (0.75 arcsec resolution, 2.3 μJy beam−1 rms), i.e. the radio sources which are composed of two or more radio blobs. Methods. The classification of objects into multi-components was done by visual inspection of 351 of the brightest and most extended blobs from a sample of 10,899 blobs identified by the automatic code BLOBCAT. For that purpose we used multi-wavelength information of the field, such as the 1.4 GHz VLA-COSMOS data and the Ultra Deep Survey with the VISTA telescope (UltraVISTA) stacked mosaic available for COSMOS. Results. We have identified 67 multi-component radio sources at 3 GHz: 58 sources with active galactic nucleus (AGN) powered radio emission and nine star-forming galaxies. We report eight new detections that were not observed by the VLA-COSMOS Large Project at 1.4 GHz, due to the slightly larger area coverage at 3 GHz. The increased spatial resolution of 0.75 arcsec has allowed us to resolve (and isolate) multiple emission peaks of 28 extended radio sources not identified in the 1.4 GHz VLA-COSMOS map. We report the multi-frequency flux densities (324 MHz, 325 MHz, 1.4 GHz & 3 GHz), star formation rates, and stellar masses of these objects. We find that multi-component objects at 3 GHz VLA-COSMOS inhabit mainly massive galaxies (> 1010.5 M⊙). The majority of the multi-component AGN lie below the main sequence of star-forming galaxies (SFGs), in the green valley and the quiescent region. Furthermore, we provide detailed descriptions of the objects and find that amongst the AGN there are two head-tail, ten core-lobe, nine wide-angle-tail (WAT), eight double-double or Z-/X-shaped, three bent-tail radio sources, and 26 symmetric sources, while amongst the SFGs we find the only star-forming ring seen in radio emission in COSMOS. Additionally, we report a large number (32 out of 58) of disturbed/bent multi-component AGN, 18 of which do not lie within X-ray groups in COSMOS (redshift range 0.08 ≤ z < 1.53). Conclusion. The high angular resolution and sensitivity of the 3 GHz VLA-COSMOS data set give us the opportunity to identify peculiar radio structures and sub-structures of multi-component objects, and relate them to physical phenomena such as AGN or star-forming galaxies. This study illustrates the complexity of the μJy radio-source population; at the sensitivity and resolution of 3 GHz VLA-COSMOS, the radio structures of AGN and SFG both emitting radio continuum emission, become comparable in the absence of clear, symmetrical jets. Thus, disentangling the AGN and SFG contributions using solely radio observations can be misleading in a number of cases. This has implications for future surveys, such as those done by square kilometre array (SKA) and precursors, which will identify hundreds of thousands of multi-component objects.

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Korolev, N. Yu, I. A. Levitsky, and E. M. Khorov. "Performance Evaluation of Multi-Link Single-Radio and Multi-Radio Devices in Heterogeneous Wi-Fi 7 Networks." Journal of Communications Technology and Electronics 67, S2 (December 2022): S211—S221. http://dx.doi.org/10.1134/s1064226922140030.

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Yao, Zhi Chao. "Implementation of Software Radio Multi-Mode Modem on FPGA." Applied Mechanics and Materials 608-609 (October 2014): 512–16. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.512.

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This paper introduces the software radio technology model and multi mode modem technology based on software radio, and analyzed and designed in detail the multi mode modem technology and current communication field, finally, and it is realize on the FPGA. Multi mode modem greatly improving communication system reliability, flexibility, increase system capacity, will have broad market prospect.

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Wu, Hsin-Te, and Mu-Yen Chen. "A multi-function wearable radio transceiver device based on radio communication technology." Computers & Electrical Engineering 91 (May 2021): 107062. http://dx.doi.org/10.1016/j.compeleceng.2021.107062.

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Eie, Sujin, Toshio Terasawa, Takuya Akahori, Tomoaki Oyama, Tomoya Hirota, Yoshinori Yonekura, Teruaki Enoto, et al. "Multi-frequency radio observations of the radio-loud magnetar XTE J1810−197." Publications of the Astronomical Society of Japan 73, no. 6 (November 2, 2021): 1563–74. http://dx.doi.org/10.1093/pasj/psab098.

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Abstract We report on the multi-frequency multi-epoch radio observations of the magnetar XTE J1810−197, which exhibited a radio outburst from 2018 December after its 10-year quiescent period. We performed quasi-simultaneous observations with VERA (22 GHz), Hitachi (6.9 GHz and 8.4 GHz), Kashima (2.3 GHz), and Iitate (0.3 GHz) radio telescopes located in Japan to trace the variability of the magnetar radio pulsations during the observing period from 2018 December 13 to 2019 June 12. The pulse width becomes narrower as the observing frequency goes higher, analogous to the general profile narrowing behavior of ordinary pulsars. When assuming a simple power law in the range of 2.3 GHz and 8.7 GHz, the radio spectrum of the magnetar goes steeper with the average spectral index 〈α〉 ≈ −0.85 for the first four months. The wide-band radio spectra gathered from our observations and the literature suggest that XTE J1810−197 would have a double-peaked spectrum with a valley point in 22–150 GHz, where the first spectral peak implies a gigahertz-peaked spectrum (GPS) feature with a peak at a few GHz. The GPS and the high-frequency peak have been identified in the spectra of other radio-loud magnetars, thus they may be intrinsic features that can give a new insight to the understanding of various emission mechanisms and the surrounding environments of radio magnetars. Our study emphasizes the importance of simultaneous long-term broad-band observations toward radio-loud magnetars to capture the puzzling spectral features and establish a link to other types of neutron stars.

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