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Journal articles on the topic 'Radio Transmitters and transmission'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 July 2024

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1

Zheng, Rui. "Utilizing Microwave Technology in Radio and Television Transmitters." Journal of Electronic Research and Application 7, no. 4 (2023): 1–6. http://dx.doi.org/10.26689/jera.v7i4.5166.

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In order to improve the performance and reliability of the radio and television transmission system and provide users with a better audiovisual experience this paper first analyzes the advantages of microwave in radio and television transmitters and further elaborates the radio and television transmission system. Through the reasonable configuration and application of microwave equipment the performance and reliability of radio and television transmission system can be improved and the stable transmission of radio and television signals can be ensured.

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2

Goel, Paurav, Avtar Singh, and Ashok Goel. "Transmit power control and data rate enhancement in cognitive radio network using computational intelligence." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 2 (2022): 1602. http://dx.doi.org/10.11591/ijece.v12i2.pp1602-1616.

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Underutilized radio frequencies are the chief apprehension in advance radio communication. The radio recourses are sparse and costly and their efficient allocation has become a challenge. Cognitive radio networks are the ray of hope. Cognitive radio networks use dynamic spectrum access technique to opportunistically retrieve and share the licensed spectrum. The licensed users are called primary users and the users that opportunistically access the licensed spectrum all called secondary users. The proposed system is a feedback system that work on demand and supply concept, in which secondary re

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3

Ravishankar, Krishnamurthi, and Suresh Singh. "Central Limit Theorem for Time to Broadcast in Radio Networks." Probability in the Engineering and Informational Sciences 9, no. 2 (1995): 201–9. http://dx.doi.org/10.1017/s026996480000379x.

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We study the problem of broadcasting in a system where nodes are equipped with radio transmitters with constant radius of transmission. A message originating at a node has to be transmitted to all the other nodes in the system. We prove the central limit theorem and the law of large numbers for the number of time steps required to complete a broadcast for the case when the nodes are placed on a line independently uniformly distributed. We show that the number of time steps required to broadcast is 3n/4 in probability.

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4

CHEN, XIAOLONG, XIANGBO MENG, XIAOSHI SONG, and CHUN SHAN. "COVERAGE PERFORMANCE OF COGNITIVE RADIO NETWORKS POWERED BY RENEWABLE ENERGY." ANZIAM Journal 58, no. 3-4 (2017): 287–305. http://dx.doi.org/10.1017/s1446181117000244.

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We analyse the coverage performance of cognitive radio networks powered by renewable energy. Particularly, with an energy harvesting module and energy storage module, the primary transmitters (PTs) and the secondary transmitters (STs) are assumed to be able to collect ambient renewables, and store them in batteries for future use. Upon harvesting sufficient energy, the corresponding PTs and STs (denoted by eligible PTs and STs) are then allowed to access the spectrum according to their respective medium access control (MAC) protocols. For the primary network, an Aloha-type MAC protocol is cons

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5

Rha, P. S., and A. K. Johnson. "Transmission analysis on the resonant-cavity combiner of mobile radio transmitters." IEEE Transactions on Vehicular Technology 45, no. 1 (1996): 139–47. http://dx.doi.org/10.1109/25.481831.

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6

Amstrup, S. C., G. M. Durner, T. L. McDonald, D. M. Mulcahy, and G. W. Garner. "Comparing movement patterns of satellite-tagged male and female polar bears." Canadian Journal of Zoology 79, no. 12 (2001): 2147–58. http://dx.doi.org/10.1139/z01-174.

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Satellite radiotelemetry has provided great insights into the movements and behaviors of polar bears (Ursus maritimus). The diameter of the neck of adult male polar bears exceeds that of their head, however, and radio collars slip off. This has limited collection of movement information to that from radio-collared females. To overcome this difficulty and gather information about their movements, we surgically implanted satellite radio transmitters into 7 male polar bears during 1996 and 1997. We compared movements of implanted males with those of 104 adult females radio-collared between 1985 a

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7

G, Gandikota Ramu, Narayanan Ramachandran, Karunamurthy A, and Alfrin Vickson. "Energy Harvesting and Optimization Using Broadcast Channel Approach for MIMO Systems in Wireless Sensor Networks." ECS Transactions 107, no. 1 (2022): 16519–30. http://dx.doi.org/10.1149/10701.16519ecst.

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EM or radio signal enabled WPT in particular. Since radio signals can carry power and information simultaneously, simultaneous data transmission and power transmission (SWIPT). A three-point wireless transmission system (MIMO), in which one receiver harvests power and the other receiver determines the data separately from the signals sent by the standard transmitter, and all transmitters and receivers probably have multiple antennas. Two scenarios are tested, in which the information receiver and the power receiver are separated and detect different MIMO channels from the transmitter, or which

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8

Pathak, P. P., Vijay Kumar, and R. P. Vats. "Environment condition around transmission towers not fit for livelihood." Environment Conservation Journal 4, no. 1-3 (2003): 79–82. http://dx.doi.org/10.36953/ecj.2003.0412311.

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Influence of radio frequency (RF) and mircowave radiation on human body is studied. According to Rai (1992) radio and T.V. transmission towers of Varanasi, which are located in thickly populated area, are causing health hazards problems to the people. Theoretical analysis shows that a transmission tower of 10 kW is expected to cause harmful effects on the people living upto about 300 m. For low power transmitters the distance is smaller. The radiation is more hazardous if a high voltage power transmission line is also passing over the area, as the combined effect of the two radiations may caus

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9

Luchinin, A. S., I. V. Malygin, S. I. Starikov, V. A. Chechetkin, A. A. Shegal, and S. A. Belkov. "Mechanisms of ensuring the accuracy and reliability of data transmission over a radio channel using relay technology and their implementation on transceivers with LoRa modulation." Ural Radio Engineering Journal 7, no. 2 (2023): 191–217. http://dx.doi.org/10.15826/urej.2023.7.2.006.

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The article is devoted to a detailed description of the algorithms of the operation of the relay-race data transmission system over a radio channel, which ensure high reliability of transporting the results of monitoring the operation of extended objects to the central control panel. The feature of the system is operation at a low power level of transmitters, energy efficiency, which ensures a long-term operation without maintenance, the ability to replace failed elements quickly without stopping the entire system, mobility — quick installation and start-up of the system. Energy efficiency and

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10

Camuñas-Mesa, Luis A., and José M. de la Rosa. "Combining Software-Defined Radio Learning Modules and Neural Networks for Teaching Communication Systems Courses." Information 14, no. 11 (2023): 599. http://dx.doi.org/10.3390/info14110599.

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The paradigm known as Cognitive Radio (CR) proposes a continuous sensing of the electromagnetic spectrum in order to dynamically modify transmission parameters, making intelligent use of the environment by taking advantage of different techniques such as Neural Networks. This paradigm is becoming especially relevant due to the congestion in the spectrum produced by increasing numbers of IoT (Internet of Things) devices. Nowadays, many different Software-Defined Radio (SDR) platforms provide tools to implement CR systems in a teaching laboratory environment. Within the framework of a ‘Communica

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11

Balkar Singh. "Working, design issues and applications of wireless sensor network." International Journal of Science and Research Archive 7, no. 2 (2022): 218–20. http://dx.doi.org/10.30574/ijsra.2022.7.2.0266.

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Wireless sensor networks (WSN) also known as wireless sensor and actuator networks (WSAN). These are distributed autonomous sensors for monitoring environmental or physical conditions, like sound, temperature pressure, etc. and used for passing their data via the network to a main location. These are measurement tools which are equipped with transmitters for converting the signals into a radio transmission from process control instruments. Receiver interprets the radio signal after that converts the wireless signal to a desired or specific output, like a data or Analog current analysis via com

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12

Zhou, Qin, Jinglin Zheng, Seita Onishi, M. F. Crommie, and Alex K. Zettl. "Graphene electrostatic microphone and ultrasonic radio." Proceedings of the National Academy of Sciences 112, no. 29 (2015): 8942–46. http://dx.doi.org/10.1073/pnas.1505800112.

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We present a graphene-based wideband microphone and a related ultrasonic radio that can be used for wireless communication. It is shown that graphene-based acoustic transmitters and receivers have a wide bandwidth, from the audible region (20∼20 kHz) to the ultrasonic region (20 kHz to at least 0.5 MHz). Using the graphene-based components, we demonstrate efficient high-fidelity information transmission using an ultrasonic band centered at 0.3 MHz. The graphene-based microphone is also shown to be capable of directly receiving ultrasound signals generated by bats in the field, and the ultrason

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13

Sudibya, Bambang, Denny Dermawan, Muhammad Jalu Purnomo, and Mardiana Irawaty. "Radio Transmission Detection Using Doppler in UHF Frequency Band." AVITEC 4, no. 1 (2022): 89. http://dx.doi.org/10.28989/avitec.v4i1.1185.

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The direction finder of a radio transmitter is a device that functions to find and determine the direction of a radio transmitter that works in the Ultra High Frequency (UHF) band. UHF frequency used is in the range of 420 - 440 MHz. The concept of Doppler radio is used as a method to determine the direction a radio transmitter is located. Radio Doppler use four receiving antennas which are installed at a certain distance so that it can produce a difference in frequency (Doppler) on each radio antenna because of the difference in the angle of the detected signal. The direction of the incoming

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14

P. Durga, R. Devishree, R. Abinaya, Ravishankar Kandasamy, Dr M. Sudha,. "PACKET OPTIMIZATION IN ADAPTIVE COGNITIVE RADIO SENSOR NETWORKS USING OFDM." INFORMATION TECHNOLOGY IN INDUSTRY 9, no. 2 (2021): 22–28. http://dx.doi.org/10.17762/itii.v9i2.296.

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With the rapid development of digital communication, the demand for spectral resources is increasing and the building of cognitive radios is the right solution for that. Cognitive radio networks are designed to utilize the licensed spectrum when it is not used by the primary licensed users. We are going to propose a method for effective data transmission and streaming in cognitive radio networks. By that we can achieve energy efficiency, less power consumption and much more transmitted information. In this paper, we are going to employ the OFDM method of spectrum sensing and proposed to use Co

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15

Ho-Van, Khuong, and Thiem Do-Dac. "Security Enhancement for Energy Harvesting Cognitive Networks with Relay Selection." Wireless Communications and Mobile Computing 2020 (September 29, 2020): 1–13. http://dx.doi.org/10.1155/2020/8867148.

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Relay selection is proposed in this paper as an efficient solution to secure information transmission of secondary users against eavesdroppers in energy harvesting cognitive networks. The proposed relay selection method selects a secondary relay among available secondary relays, which are capable of harvesting radio frequency energy in signals of the secondary transmitter and correctly restore secondary message, to curtail signal-to-noise ratio at the wire-tapper. In order to evaluate the security performance of the suggested relay selection method, an exact intercept outage probability formul

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16

Vinar, P. O., S. V. Rabin, and A. V. Rabin. "Synthesis method of circulant polynomial encoding matrices for the implementation of code-division multiplexing." Journal of Physics: Conference Series 2094, no. 3 (2021): 032067. http://dx.doi.org/10.1088/1742-6596/2094/3/032067.

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Abstract The method of the synthesis of circulant polynomial matrices for the implementation of the operation of code combining of channels on the transmitting side of the communication system has been developed. The structure of these matrices is the basis for reducing the complexity of encoder schemes and, consequently, the radiated power of radio transmitters of subscriber devices. The research results can be applied in communication systems with multiple access, with a wide coverage area, high quality of data transmission, high noise immunity, stability of communication channels from inter

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17

Robinson, Andrew R., Michael Esty, and Charles E. Tilburg. "A Compact GPS Surface Drifter with LoRa Telemetry and Self-Contained Tracking System." Marine Technology Society Journal 55, no. 1 (2021): 88–105. http://dx.doi.org/10.4031/mtsj.55.1.5.

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AbstractShallow marine environments are characterized by complex and variable physical processes that have significance for biological and human communities. However, the global disparity in scientific resources limits examination of the coastal ocean in some regions, so the development of universal and accessible technologies is needed. We combined a compact, GPS-equipped drifter design with long-range (LoRa) radio telemetry and a receiver system housed on a research vessel to develop a low-cost, easily assembled system of drifters. LoRa transmission of real-time location data while deployed

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18

JM, Rodríguez-Lelis, Arellano-Cabrera JA, Abúndez-Pliego A, Rodríguez Ramírez JA, and Pérez Ortega J. "A numerical analysis of the contact stresses on surface of the femoral condyles of a knee prosthesis." Advances in Tissue Engineering & Regenerative Medicine: Open Access 7, no. 1 (2021): 28–33. http://dx.doi.org/10.15406/atroa.2021.07.00124.

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Significant concerns have been raised about the potential harmful impact of radio frequencies (RF) transmitted from these devices, especially with the excessive usage of mobile telecommunication systems. A faraday cage was constructed to house cell culture plates in between a radio transmitter and its receiver. Three different cell lines were cultured on 10μg/mL of collagen and fibronectin and exposed to RF using an 8-bit encrypted pulse signal at 433 MHz, 1.02 (Amps) for 3 hours to determine the cell proliferation effects. The results demonstrated that HFF-1 on fibronectin with RF exposure co

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19

Khan, Sikandar Zulqarnain, Yannick Le Moullec, and Muhammad Mahtab Alam. "An NB-IoT-Based Edge-of-Things Framework for Energy-Efficient Image Transfer." Sensors 21, no. 17 (2021): 5929. http://dx.doi.org/10.3390/s21175929.

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Machine Learning (ML) techniques can play a pivotal role in energy efficient IoT networks by reducing the unnecessary data from transmission. With such an aim, this work combines a low-power, yet computationally capable processing unit, with an NB-IoT radio into a smart gateway that can run ML algorithms to smart transmit visual data over the NB-IoT network. The proposed smart gateway utilizes supervised and unsupervised ML algorithms to optimize the visual data in terms of their size and quality before being transmitted over the air. This relaxes the channel occupancy from an individual NB-Io

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20

Abdulkadir, Yusuf, Oluyomi Simpson, and Yichuang Sun. "Interference Alignment for Cognitive Radio Communications and Networks: A Survey." Journal of Sensor and Actuator Networks 8, no. 4 (2019): 50. http://dx.doi.org/10.3390/jsan8040050.

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Interference alignment (IA) is an innovative wireless transmission strategy that has shown to be a promising technique for achieving optimal capacity scaling of a multiuser interference channel at asymptotically high-signal-to-noise ratio (SNR). Transmitters exploit the availability of multiple signaling dimensions in order to align their mutual interference at the receivers. Most of the research has focused on developing algorithms for determining alignment solutions as well as proving interference alignment’s theoretical ability to achieve the maximum degrees of freedom in a wireless network

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21

Koam, Ali N. A., Ali Ahmad, and Azeem Haider. "Radio Number Associated with Zero Divisor Graph." Mathematics 8, no. 12 (2020): 2187. http://dx.doi.org/10.3390/math8122187.

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Radio antennas use different frequency bands of Electromagnetic (EM) Spectrum for switching signals in the forms of radio waves. Regulatory authorities issue a unique number (unique identifying call sign) to each radio center, that must be used in all transmissions. Each radio center propagates channels to the two nearer radio centers so they must use distinctive numbers to avoid interruption. The task of effectively apportioning channels to transmitters is known as the Channel Assignment (CA) problem. CA Problem is discussed under the topic of graph coloring by mathematicians. The radio numbe

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22

Herfandi, Muhammad, and Muhammad Wahyudi. "RADIO DAN TAPE RECORDER SEBAGAI MEDIA PEMBELAJARAN." Jurnal At-Tabayyun 6, no. 1 (2023): 1–11. http://dx.doi.org/10.62214/jat.v6i1.86.

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One of the learning media that can be used is radio and tape recorder. Radio is an auditory learning medium that can only be enjoyed through hearing aids. The effect of the actuality of radio can be served more quickly than television The problem discussed in this study is what is the essence of radio learning media and audio tape recorders? What is the history of radio and audio tape recorder In 1951, the public education service at the ministry of education and teaching, organized a radio broadcast program for public education. The target of radio education is mainly demobilized students, wh

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23

Varshney, Ambuj. "Making Low-Power and Long-Range Wireless Backscatter Transmitters." GetMobile: Mobile Computing and Communications 26, no. 2 (2022): 5–11. http://dx.doi.org/10.1145/3551670.3551672.

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The past decade has seen significant increases in the deployment of wireless embedded systems. However, several challenges exist that may hinder, or even stop, this rapid growth. Among them, a significant power asymmetry among platform components is a major concern. In particular, the radio transmitters consume orders of magnitude more power than the remaining components. One promising approach to address this challenge is to design wireless transmitters based on the backscatter mechanism. This mechanism allows wireless transmissions to occur at a similar power budget to sensing and computatio

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Latika Herda, Deri, Siska Aulia, and Frenzi Agres Yudithia. "Perancangan Antena Vivaldi Antipodal 2 - 18 GHz untuk Radio Direction Finder." Spektral 4, no. 1 (2023): 166–72. http://dx.doi.org/10.32722/spektral.v4i1.5654.

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The 2-18 GHz frequency band is a spectrum that is widely used for telecommunication systems, both military and civil. This is proportional to the number of illegal uses. This research develops an antipodal vivaldi antenna to support direction finding activities of illegal transmitters in the 2-18 GHz frequency band. Antenna design is a simulation using CST software by modifying the ground, widening the antenna arm, and increasing the length of the transmission line. The antenna design measures 94.14 x 73.2 mm on FR-4 substrate with a dielectric constant of 4.6 and a thickness of 1.6 mm. The si

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25

Abdelatty, Omar, Xing Chen, Abdullah Alghaihab, and David Wentzloff. "Bluetooth Communication Leveraging Ultra-Low Power Radio Design." Journal of Sensor and Actuator Networks 10, no. 2 (2021): 31. http://dx.doi.org/10.3390/jsan10020031.

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Energy-efficient wireless connectivity plays an important role in scaling both battery-less and battery-powered Internet-of-Things (IoT) devices. The power consumption in these devices is dominated by the wireless transceivers which limit the battery’s lifetime. Different strategies have been proposed to tackle these issues both in physical and network layers. The ultimate goal is to lower the power consumption without sacrificing other important metrics like latency, transmission range and robust operation under the presence of interference. Joint efforts in designing energy-efficient wireles

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26

Sawahashi, M., and Y. Inukai. "Transmitter diversity effect in TDMA/TDD mobile radio transmission." Electronics Letters 28, no. 24 (1992): 2201. http://dx.doi.org/10.1049/el:19921414.

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27

Varlamov, O. V. "POWERFUL BROADBAND DC AMPLIFIERS FOR MODULATION PATH OF TRANSMITTERS WITH SEPARATE AMPLIFICATION." T-Comm 16, no. 11 (2022): 4–14. http://dx.doi.org/10.36724/2072-8735-2022-16-11-4-14.

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Increasing transmission path efficiency, as the largest consumer of electricity, is relevant for any wireless communication devices, digital television, and radio broadcasting. A number of methods are used to improve efficiency, including Envelope Tracking (ET) and Envelope Elimination and Restoration (EER, or Kahn method). Increasing the bandwidth of used frequencies in 5G radio systems requires expanding the modulation path DC amplifiers bandwidth to 250…500 MHz or more. The possibility of using amplifiers with input signal quantization (AISQ) as an alternative to the most common broadband h

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28

Авдєєнко, Гліб Леонідович, Сергій Георгійович Бунін та Теодор Миколайович Наритник. "ТЕРАГЕРЦОВІ ТЕХНОЛОГІЇ В ТЕЛЕКОМУНІКАЦІЙНИХ СИСТЕМАХ. ЧАСТИНА 2. ДОСЛІДЖЕННЯ ТА МОДЕЛЮВАННЯ ПЕРЕДАВАННЯ ТЕЛЕВІЗІЙНИХ СИГНАЛІВ СТАНДАРТУ DVB-C І ІМПУЛЬСНОГО НАДШИРОКОСМУГОВОГО СИГНАЛУ РАДІОЛІНІЄЮ ТЕРАГЕРЦОВОГО ДІАПАЗОНУ". RADIOELECTRONIC AND COMPUTER SYSTEMS, № 3 (30 жовтня 2018): 80–96. http://dx.doi.org/10.32620/reks.2018.3.09.

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The laboratory testbed of a digital simplex radio-relay system of the terahertz range has been studied for the first time in practical terms. It consists of the receiver and transmitter parts of 130÷134 GHz frequency range and a digital modem with a channel data transmission of up to 1200 Mbps for a communication point-to-point distance under normal conditions within 1 km. It is shown that the proposed telecommunication system, which implements the concept of the creation of software-defined radio systems based on Wi-Fi technology, can be highly productive in the next generation mobile communi

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29

Rodriguez-Colina, Enrique, Cesar A. Hernandez, Luis Fernando Pedraza, Alfonso Prieto-Guerrero, and Miguel Lopez-Guerrero. "Dynamic OFDM Transmission for a Cognitive Radio Device Based on a Neural Network and Multiresolution Analysis." Wireless Communications and Mobile Computing 2018 (August 2, 2018): 1–11. http://dx.doi.org/10.1155/2018/4392710.

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Cognitive radio communications depend on methods for sensing the spectrum as well as adapting transmission parameters to available resources. In this context, this work proposes a novel system that makes use of prediction to dynamically allocate subcarriers to different transmissions in an orthogonal frequency division multiplexing (OFDM) system. To this end, the proposal is comprised of a predictive component which makes use of a neural network and multiresolution analysis and a second component, which uses wavelet analysis and cognitive radio functions to carry out a dynamic allocation of su

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30

Curatolo, James A. "Evaluation of a satellite telemetry system for monitoring movements of caribou." Rangifer 6, no. 2 (1986): 73. http://dx.doi.org/10.7557/2.6.2.585.

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A cow caribou from the Central Arctic Herd was collared with a satellite-monitored radio transmitter in the Kuparuk Oilfield, Alaska, in 1984. From 19 June to 17 August, the radio transmitted 18 hours per day. A total of 346 locations were recorded, for a mean of 5.8 locations per day or one location every 3.1 hours of transmission time. The location of 13 direct observations of the radio-collared cow averaged less than 1 km from the nearest satellite-fixed location. The satellite-fixed locations of the radio-collared cow provided detailed data on movement patterns during the three seasons stu

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Yang, Liu, Guo Xin Zheng, Chao Pan, and Zhao Pu Chai. "VMCK Transmission System Design for SDR Applications." Applied Mechanics and Materials 568-570 (June 2014): 1340–44. http://dx.doi.org/10.4028/www.scientific.net/amm.568-570.1340.

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Very minimum chirp keying (VMCK) as a novel high bandwidth efficiency modulation scheme is implemented on small form factor (SFF) software-defined radio (SDR). The VMCK transmission system model is elaborated based on Simulink within Matlab. Also, the final demodulation data stream at the output of the VMCK transmission system shows good performance in simulation. The transmitter and the receiver are designed on the SDR platform. The VMCK baseband signals with 2.5MHz are transmitted from Matlab workspace by ROM block, and then the VMCK signals are ratio frequency (RF) modulated with 432MHz. In

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Lopez-Aguilera, Elena, and Eduard Garcia-Villegas. "Bandwidth-Based Wake-Up Radio Solution through IEEE 802.11 Technology." Sensors 21, no. 22 (2021): 7597. http://dx.doi.org/10.3390/s21227597.

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IEEE 802.11 consists of one of the most used wireless access technologies, which can be found in almost all consumer electronics devices available. Recently, Wake-up Radio (WuR) systems have emerged as a solution for energy-efficient communications. WuR mechanisms rely on using a secondary low-power radio interface that is always in the active operation mode and is in charge of switching the primary interface, used for main data exchange, from the power-saving state to the active mode. In this paper, we present a WuR solution based on IEEE 802.11 technology employing transmissions of legacy fr

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Tang, Kun, Wenjuan Tang, Entao Luo, Zhiyuan Tan, Weizhi Meng, and Lianyong Qi. "Secure Information Transmissions in Wireless-Powered Cognitive Radio Networks for Internet of Medical Things." Security and Communication Networks 2020 (February 24, 2020): 1–10. http://dx.doi.org/10.1155/2020/7542726.

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In this paper, we consider the issue of the secure transmissions for the cognitive radio-based Internet of Medical Things (IoMT) with wireless energy harvesting. In these systems, a primary transmitter (PT) will transmit its sensitive medical information to a primary receiver (PR) by a multi-antenna-based secondary transmitter (ST), where we consider that a potential eavesdropper may listen to the PT’s sensitive information. Meanwhile, the ST also transmits its own information concurrently by utilizing spectrum sharing. We aim to propose a novel scheme for jointly designing the optimal paramet

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Mohammed, Amin Salih, Ihor Romanenko, Saravana Balaji B, Yevhen Kalashnikov, and Nina Kuchuk. "A Novel Method for Increasing the Overheat Ability of Radio Communication Devices with Frequency Hopping Spread Spectrum." International Journal of Interactive Mobile Technologies (iJIM) 14, no. 11 (2020): 224. http://dx.doi.org/10.3991/ijim.v14i11.13647.

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<span>Due to an increase in the number of radio devices with different types of signals and to increase the speed of information transmission, it is necessary to take into account the increase in the probability of erroneous reception of signals as a result of specific disturbances. The investigated methods (techniques) for increasing the noise immunity of radio communication with the FHSS do not take into account the influence of transmitters and fail to predict the load of the radio frequency spectrum. The purpose of this work is the development of the algorithm for the practical imple

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Karyakin, Vladimir L. "Client-server system for monitoring the quality of TV broadcasting in Russia." Physics of Wave Processes and Radio Systems 25, no. 3 (2022): 36–42. http://dx.doi.org/10.18469/1810-3189.2022.25.3.36-42.

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The strategy for the development of television and radio broadcasting in the Russian Federation until 2025 specifically states the need to ensure the reliability of uninterrupted television and radio broadcasting. The quality of DVB-T2 broadcasting is estimated by the data transmission rate and the bit error rate BER (Bit Error Ratio) stability margin «at the last mile» in the retransmitters’ broadcast zones. The distributed client-server system of broadcast quality monitoring in RF, proposed in the article, uses the necessary equipment, including BER sensors based on programmable receivers co

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Fu, Gang, Jian Hua Lin, and Qian He. "Research on Data Parallel Synchronous Transmission Technology Based Virtual Radio." Applied Mechanics and Materials 644-650 (September 2014): 1414–17. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.1414.

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Analyzing the parallel synchronous transmission data based on the proposed use of time-multiplexing transmission mode dynamic solve the transmission delay is large, the traditional structure of the software causing the radio frame data are transmitted in parallel low-speed data blocking phenomenon; and problems caused by data transmission and processing delay for virtual radio monitoring system uses asynchronous mode uncertainty, proposed time synchronization method based on the data frame structure to a more generalized approach to achieve a measure of sync.

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Oni, Phillip Babatunde, Ruifeng Duan, and Mohammed Elmusrati. "Dual Analysis of the Capacity of Spectrum Sharing Cognitive Radio with MRC under Nakagami-m Fading." Conference Papers in Engineering 2013 (May 28, 2013): 1–8. http://dx.doi.org/10.1155/2013/572383.

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In this study, the maximum achievable information transmission rate of spectrum sharing cognitive radio with maximal ratio combining (MRC) antenna diversity technique is investigated when the channel between the secondary transmitter and the primary receiver and that between the secondary transmitter and the secondary receiver suffer Nakagami-m fading. With an assumption that both channels encounter Nakagami-m fading and the transmission of the secondary transmitter is subject to average interference power constraint, the approximated expressions for analyzing the effective capacity and the er

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Isakovs, V., K. Kondratjevs, N. Kunicina, B. Freliha, and A. Zabasta. "Development of Dynamically Optimized Wireless Transmission System for Wireless Sensor Networks in Highrise Apartment Building Heating Systems / Optimizētas Dinamiskās Bezvadu Sensoru Tīklu Pārraides Risinājuma Izstrāde Daudzstāvu Ēku Apkures Sistēmas Parametru Izgūšanai Un Vadībai." Latvian Journal of Physics and Technical Sciences 52, no. 4 (2015): 32–42. http://dx.doi.org/10.1515/lpts-2015-0021.

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Abstract Smart meters will be at the centre of the integrated solutions, including interaction with other networks in the next decade. The developed solution for multi-apartment building ventilation and heating parameter monitoring aims to increase energy efficiency and optimal control of the existing system. Dynamic control of heat and ventilation systems, heat loss detection, calculation and mitigation, and individual heat energy accounting are difficult tasks to accomplish. This article deals with the data transmission system using battery powered ISM band radio transmitters. The temperatur

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Liu, Anliang, and Hongzhi Li. "Multiband RoF System with Good Transmission Performance Based on Additional SCS." Wireless Communications and Mobile Computing 2022 (August 22, 2022): 1–7. http://dx.doi.org/10.1155/2022/5747959.

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A wavelength division multiplexing radio-over-fiber (WDM-RoF) system that can support multiband radio signals based on an additional subcentral station (SCS) is proposed and demonstrated in this paper. The dispersion characteristics of the multiband radio signals over fiber transmission are explored, and we exploit an improved transmission structure consisting of the central station (CS), the SCS, and base stations (BSs) to optimize the antidispersion performance of the proposed RoF system. At the SCS, a dual-drive Mach-Zehnder modulator (MZM) is employed to realize a cost-effective multiband

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Makashov, Andrey, Andrew Makhorin, and Maxim Terentiev. "Anti-jamming Wireless Sensor Network Model." International Journal of Circuits, Systems and Signal Processing 16 (January 12, 2022): 352–59. http://dx.doi.org/10.46300/9106.2022.16.43.

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A wireless sensor network (WSN) of a tree-like topology is considered, which performs measurements and transmits their results to the consumer. Under the interference influence, the WSN nodes transmitters low power makes the transmitted information vulnerable, which leads to significant data loss. To reduce the data loss during transmission, a noise-immune WSN model is proposed. Such a WSN, having detected a stable connection absence between a pair of nodes, transfers the interaction between these nodes to a radio channel free from interference influence. For this, the model, in addition to fo

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Khalid, Waqas, and Heejung Yu. "Spatial–Temporal Sensing and Utilization in Full Duplex Spectrum-Heterogeneous Cognitive Radio Networks for the Internet of Things." Sensors 19, no. 6 (2019): 1441. http://dx.doi.org/10.3390/s19061441.

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The continuous growth of interconnected devices in the Internet of Things (IoT) presents a challenge in terms of network resources. Cognitive radio (CR) is a promising technology thatcan address the IoT spectral demands by enabling an opportunistic spectrum access (OSA) scheme. The application of full duplex (FD) radios in spectrum sensing enables secondary users (SUs) to perform sensing and transmission simultaneously, and improves the utilization of the spectrum. However, random and dense distributions of FD-enabled SU transmitters (FD-SU TXs) with sensing capabilities in small-cell CR-IoT e

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Chaudhary, Sushank, Priyanka Chauhan, and Abhishek Sharma. "High Speed 4 × 2.5 Gbps-5 GHz AMI-WDM-RoF Transmission System for WLANs." Journal of Optical Communications 40, no. 3 (2019): 285–88. http://dx.doi.org/10.1515/joc-2017-0082.

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Abstract Radio-over-fiber (RoF) is revolutionary technique to transmit radio signals over optical fiber. It can be also suitable to distribute wireless local area networks (WLANs) due to its low-cost implementation. WLANs generally operate on 5 GHz radio signals. Thus in this work, four high speed radio channels, each carrying 2.5 Gbps data and 5 GHz radio signal, are transmitted by incorporating alternate mark inversion (AMI) scheme and wavelength division multiplexing (WDM) scheme over optical fiber having span of 50 km. The performance of proposed AMI-WDM-RoF transmission system is reported

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Zidaru, Marian. "SOE, Iasi-Chișinău Offensive and Coup D’Etat from August 23, 1944." International conference KNOWLEDGE-BASED ORGANIZATION 26, no. 2 (2020): 366–75. http://dx.doi.org/10.2478/kbo-2020-0105.

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AbstractBetween 1941-1944, S.O.E. (Special Operation Executive)activity in Romania depended heavily on the collaboration with Maniu and P.N.T (National Peasant Party - Partidul National Țărănesc). In order to improve its activity, S.O.E. has taken steps to create a reliable communication channel between S.O.E. residents in Istanbul and Bucharest. The connections between the residence in Istanbul and the S.O.E. network in Romania were made through the connections of Switzerland and Turkey or through the transmitters sent to Istanbul, Ankara and Cairo, or through radio and radio transmissions la

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Pishchin, Oleg Nickolaevich, and Kseniya Pavlovna Voronina. "Studying effectiveness of channel jamming protection in aeronautical radio communications." Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics 2022, no. 4 (2022): 48–53. http://dx.doi.org/10.24143/2073-5529-2022-4-48-53.

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When performing aviation flights the high-quality and reliable communication with the control room becomes important for ensuring the crew safety. The purpose of the study is to investigate the quality of aviation radio communication in different methods of information transmission for developing the technical solutions of radio communication perfection. The equipment used today is designed for instant selection of preset channels and data exchange at fixed operating frequencies of ground control points with aircraft radio equipment in the meter and decimeter ranges. The most important require

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STRELKOVSKAYA, Irina, Roman ZOLOTUKHIN, and Viktoria PASCALENKO. "RESEARCH OF AUDIO AND VIDEO TRAFFIC THE CHARACTERISTICS IN LOW-BANDWIDTH RADIO COMMUNICATION NETWORKS." MEASURING AND COMPUTING DEVICES IN TECHNOLOGICAL PROCESSES, no. 4 (November 30, 2023): 183–90. http://dx.doi.org/10.31891/2219-9365-2023-76-26.

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The construction of mass service systems, namely automated control systems, requires preliminary analysis and modeling of traffic in their communication networks. Mathematical models of various types of traffic have been developed for public networks, which allows to estimate the necessary functional characteristics of equipment for building a communication network, depending on the number of users. Low-bandwidth communication networks, which are built on the basis of ultra high frequency and very high frequency (UHF/VHF) radio stations, are distinguished by low speed, high delay and jitter of

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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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Cheng, Li, Zhen Huan Cheng, Huan Xin Cheng, and Peng Li. "Application of the Wireless Data Transmission System." Applied Mechanics and Materials 328 (June 2013): 177–81. http://dx.doi.org/10.4028/www.scientific.net/amm.328.177.

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Because of Urumqi Petrochemical Plant needing a large amount of industrial water, in view of their water supply problem, this paper proposed to use wireless data transmission technology to install a wireless gateway on the far flow transmitter, through the equipment RS485 interface, the cumulative flowing data accessed radio station to get the data by using the MODBUS protocol. Eventually it improves the efficiency of the water supply and centralizes management.

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Louvros, Spiros (Spyridon), Michael Paraskevas, and Theofilos Chrysikos. "QoS-Aware Resource Management in 5G and 6G Cloud-Based Architectures with Priorities." Information 14, no. 3 (2023): 175. http://dx.doi.org/10.3390/info14030175.

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Fifth-generation and more importantly the forthcoming sixth-generation networks have been given special care for latency and are designed to support low latency applications including a high flexibility New Radio (NR) interface that can be configured to utilize different subcarrier spacings (SCS), slot durations, special scheduling optional features (mini-slot scheduling), cloud- and virtual-based transport network infrastructures including slicing, and finally intelligent radio and transport packet retransmissions mechanisms. QoS analysis with emphasis on the determination of the transmitted

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Furtado, Antonio, Rodolfo Oliveira, Luis Bernardo, and Rui Dinis. "Performance Analysis of Interference-Aware Multi-Packet Reception Networks." Electronics 9, no. 4 (2020): 665. http://dx.doi.org/10.3390/electronics9040665.

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Decentralized wireless networks are gaining increasing popularity as they do not need a fixed infrastructure. Simultaneously, multiple research initiatives have led to different findings at the PHY layer of the wireless communication systems, which include Multi-Packet Reception (MPR) techniques that enable a receiver to decode multiple packets that are transmitted simultaneously. However, the distributed nature of decentralized wireless networks demands different network control policies that should take into account the MPR capabilities to increase the network performance. This work studies

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Fan, Yunyun, Xiaomin Liu, Mengfan Fu, et al. "Asymmetric point-to-multipoint coherent architecture with a frequency aliasing recovery algorithm for cost-constraint short-reach access networks." Optics Express 30, no. 18 (2022): 33124. http://dx.doi.org/10.1364/oe.463944.

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An asymmetric point-to-multipoint (PTMP) coherent architecture combined with a frequency aliasing recovery (FAR) algorithm is proposed for cost-constraint short-reach access networks. In this architecture, the uplink transmitters are simplified significantly with the uplink dual-polarization four-level pulse amplitude modulation (DP-PAM4) and downlink DP quadrature phase shift keying (DP-QPSK) asymmetric transmission design. Digital to analog converters (DACs) and radio frequency (RF) drivers are reduced by half, and in-phase and quadrature modulators (IQMs) are replaced by Mach-Zehnder modula

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