Journal articles: 'Broadband communication system'

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Basuray, Amitabha. "Broadband Coherent Communication System." IETE Technical Review 20, no. 4 (July 2003): 333–38. http://dx.doi.org/10.1080/02564602.2003.11417090.

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Kim, Ji-Sung, Jeong-In Yun, Kyung-Kuk Jung, Sung-Yoon Kim, Hee-Wook Kang, Jong-Lyul Lee, Won-Il Son, Kyung-Nam Kim, and Du-Yong Lee. "Development of marine broadband communication system." Journal of the Korean Society of Marine Engineering 42, no. 4 (May 31, 2018): 312–17. http://dx.doi.org/10.5916/jkosme.2018.42.4.312.

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Zang, Li Wei, Jie Mao, and Qiang Gao. "Research of Distribution Network Communication Based on P1901." Applied Mechanics and Materials 631-632 (September 2014): 864–68. http://dx.doi.org/10.4028/www.scientific.net/amm.631-632.864.

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Medium voltage broadband power line communication is the key component of distribution automation communication. In this paper, medium voltage broadband buried cable communication system was studied. The buried cable communication channel model was established; Reference to the IEEE P1901 standard requirements, the broadband power line communication system based on OFDM was simulated; the transmission rate was tested with the experimental system. The simulation results and actual tests show that the broadband buried cable communication system has good performance and high transmission rate which can meet the requirements of distribution network automation.

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Liu, Zuo Xue, Jian Mei Dai, and Bo Liu. "The Design of Wireless Broadband Communication System Based on OFDMA." Applied Mechanics and Materials 241-244 (December 2012): 2275–78. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.2275.

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A Wireless Broadband Communication System has been made up based on OFDMA and AMC technologies. The system structure and working pattern is introduced, the OFDMA allocation model, the MIMO and AMC scheme are present, and the parameter such as transmitting power, receiver sensitivity, transmitting antenna gain and receiving antenna gain are designed. The system enables high quality wireless broadband communication. As a supplement with wired communication systems, the system could fulfill the requirement of recovery local communication rapidly when some accidents take place.

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Yang, Guang Long, Xiao Wang, and Xue Zhi Tan. "The Current Situation and Development Trend of Trunking Mobile Communication System." Advanced Materials Research 926-930 (May 2014): 2131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.2131.

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This article interprets the current development status of trunking mobile communication system at home and abroad, makes a detailed analysis of the two existing architectures of trunking technology, introduces the demand of digital trunking broadband in China on the basis of the analysis on current situation and development trend of trunking mobile communication system. It also presents two types of domestic technical scheme in combination with the features of broadband trunking mobile communication systemr abstract.

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Tuzlukov, Vyacheslav. "Performance of Generalized Receiver Employed by Broadband Multicarrier DS-CDMA System Using Space-Time Spreading-Assisted Transmit Diversity." WSEAS TRANSACTIONS ON COMMUNICATIONS 20 (September 29, 2021): 152–71. http://dx.doi.org/10.37394/23204.2021.20.21.

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In this paper the multicarrier direct-sequence code-division multiple access (MC DS-CDMA) using space-time spreading assisted transmit diversity is investigated in the context of broadband wireless communi-cations systems constructed based on the generalized approach to signal processing in noise over frequency-se-lective Rayleigh fading channels. We consider the issue of parameter design for the sake of achieving high-ef-ficiency communications in various dispersive environments. In contrast to the conventional MC DS-CDMA wireless communication system employing the time (T)-domain spreading only, in the present paper the broad-band wireless MC DS-CDMA wireless communication schemes employ both the time (T)-domain and frequen-cy (F)-domain spreading, i.e., employ the TF-domain spreading. The bit-error rate (BER) performance of the space-time spreading assisted broadband MC DS-CDMA wireless communications system is investigated for down-link transmissions associated with the single user and multiuser generalized detectors and is compared with that of the single user correlation detector and the multiuser decorrelating detector. Our study demonstra-tes that with appropriately selecting the system parameters, the broadband MC DS-CDMA wireless communi-cation system using the space-time spreading assisted transmit diversity constitutes a promising downlink tran-smission scheme. This scheme is capable to support ubiquitous communications over diverse communication environments without the BER performance degradation

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Zang, Zhi Bin, Ying Nan Wang, Zhan Xia Wu, and Li Li Sun. "Research of Solutions Toward Typical Problems in Acquisition System of User Power Consumption." Applied Mechanics and Materials 427-429 (September 2013): 1407–14. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.1407.

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The acquisition system of user power consumption can collect data with local and remote communication. To solve the problem of local communication in different station areas, we analyzed the characteristics of Chinese power grid in six typical station areas, and found out the combined way of broadband power-line communication and micro-power wireless communication is the best solution. Meanwhile, we proposed three solutions to solve the problem of blind spots in remote communication, including wireless with electric expansion, low-voltage broadband power-line cascade connection and mid-voltage broadband power-line cascade connection [. These solutions of communication can provide technical supports to help building the acquisition system of user power consumption.

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Choi, Jae Won, Aseem V. Borkar, Andrew C. Singer, and Girish Chowdhary. "Broadband Acoustic Communication Aided Underwater Inertial Navigation System." IEEE Robotics and Automation Letters 7, no. 2 (April 2022): 5198–205. http://dx.doi.org/10.1109/lra.2022.3154004.

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Huang, Lian Fen, Xian Long Yang, and Zhi Bin Gao. "Research and Design of Broadband Trunking Communication Server Subsystem." Applied Mechanics and Materials 427-429 (September 2013): 2878–83. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.2878.

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Broadband trunking communication system is a specialized command and scheduling system for mobile communication, which has characteristics such as resources and costs sharing, high-efficient command and scheduling capability and so on. This paper firstly describes the evolution of broadband trunking communication. Based on the study of the system architecture and existing technologies, this paper proposes a way of simplifying the system architecture and elaborates the system framework into four modules including scheduler, server, base station and terminal. In the end, a program of broadband trunking communication server subsystem is designed and realized for voice service based on Linux platform. The results demonstrate the program has advantages of low-delay and high-efficient scheduling capability.

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Jeong, Su Mi, Chung Ki Seo, and Sang Jin Kim. "The Design of Combined DCU (Data Concentration Unit) System with Power-Line Communication and DOCSIS Cable Modem for AMR (Auto Meter Reading)." Advanced Engineering Forum 2-3 (December 2011): 486–88. http://dx.doi.org/10.4028/www.scientific.net/aef.2-3.486.

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The AMR (Auto Meter Reading) is needs to prepare separate IPs and communication lines for remote communication because DCU (Data Concentration Unit) and wideband modem are identical system required the resource to communication. It is the purpose of the literature to improve system stability and data reliability by means of integrating broadband cable communication part and PLC communication part within DCU. A PLC has some draw-backs in wideband communication because of absences of international standard specifications and the characteristic of power line. We integrated broadband cable modem and PLC modem in DCU. Therefore, the communication system is designed with unified board. PLC modem and broadband cable modem are designed to meet ISO/IEC12139-1 and international specified DOCSIS2.0 standard, respectively.

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Arioua, M., and M. M. Hassani. "Low Complexity FFT/IFFT Processor Applied for OFDM Transmission System in Wireless Broadband Communication." International Journal of Computer and Electrical Engineering 6, no. 2 (2014): 167–71. http://dx.doi.org/10.7763/ijcee.2014.v6.815.

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Yang, Xiaolong, Hao Yang, Tuo Li, Xiaodan Ma, and Fei Chen. "Design of Single-lamp Monitoring System for Airfield Lighting Based on Broadband Power Line Carrier Communication." Journal of Physics: Conference Series 2078, no. 1 (November 1, 2021): 012061. http://dx.doi.org/10.1088/1742-6596/2078/1/012061.

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Abstract Considering the problems of low communication rate and large communication delay of the traditional single-lamp monitoring system for airfield lighting based on narrow-band power line carrier communication technology, a solution of single-lamp monitoring system for airfield lighting based on broadband power carrier communication technology is proposed. Firstly, this paper has made a comparison of advantages and disadvantages between narrow-band power line carrier communication technology and broadband power line carrier communication technology, and briefed the problems faced by traditional single-lamp monitoring system based on narrow-band power line carrier communication. Taking technical characteristics into consideration, broadband power line carrier communication technology is selected for the development of a new single-lamp monitoring system for airfield lighting. Secondly, this paper articulated the design and development process of new airfield lighting single-lamp monitoring system based on broadband power line carrier communication technology, from the formulation of the overall architecture scheme of the system to the realization of local convergent equipment, and focused on the analysis of hardware and software development process of single-lamp monitoring module. Finally, this paper set up a test environment, and verified the performance index by experiments. The test results show that the system meets the design index requirements, can improve the performance of the single-lamp monitoring system for airfield lighting, effectively solves the problems faced by the traditional system, and can further meet the needs of the airport for airfield lighting monitoring and control.

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Li, Hao, Lu Xu, Feng Qian, and Yong Zhou. "Train-mounted Broadband Monopole Antenna for 5G Communication." Applied Computational Electromagnetics Society 36, no. 7 (August 19, 2021): 879–84. http://dx.doi.org/10.47037/2021.aces.j.360709.

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As a convenient and efficient public transport system, high speed railway (HSR) was rapidly deployed in China. Since the fifth generation (5G) mobile communication system is commercially applied, it is necessary for mobile terminals antennas to cover multiple operating bands to be compatible with various communication systems. Here a HSR-mounted broadband and high-gain monopole antenna is proposed. By using the meander technology and introducing the tapered structure, the proposed antenna operates over a bandwidth of 694-960 MHz and 1350-5975 MHz (VSWR<1.8), which covers both 2G-5G mobile communication and WiFi frequency bands. The dimensions of the proposed antenna are 400 mm × 330 mm × 78 mm. The measured average gain is 6.11 dBi over the entire bandwidth.

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Rodríguez-Morcillo, C., S. Alexandres, and J. D. Muñoz. "Broadband system to increase bitrate in train communication networks." Computer Standards & Interfaces 31, no. 2 (February 2009): 261–71. http://dx.doi.org/10.1016/j.csi.2008.05.007.

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Wittig, Manfred. "A highly innovative global broadband mobile communication system concept." Acta Astronautica 66, no. 7-8 (April 2010): 1113–24. http://dx.doi.org/10.1016/j.actaastro.2009.09.032.

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Zhang, Yiying, Fei Liu, Haoyuan Pang, Xiangzhen Li, Qinghai Ou, and Zhu Liu. "Research on Smart Grid Power Line Broadband Communication System." IOP Conference Series: Materials Science and Engineering 466 (December 28, 2018): 012075. http://dx.doi.org/10.1088/1757-899x/466/1/012075.

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Huang, H. K., R. H. Tecotzky, and Todd Bazzill. "A fiber-optic broadband CT/MR video communication system." Journal of Digital Imaging 5, no. 1 (February 1992): 20–25. http://dx.doi.org/10.1007/bf03167820.

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Romero-Castro, Mario, Mario Reyes-Ayala, Edgar Alejandro Andrade-Gonzalez, Nicolas Reyes-Ayala, and Hilario Terres-Peña. "Broadband Printed Modified Dipole for Personal Communication Systems." WSEAS TRANSACTIONS ON COMMUNICATIONS 19 (January 13, 2021): 223–30. http://dx.doi.org/10.37394/23204.2020.19.26.

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In this paper a modified printed dipole is proposed for mobile terminals operating in the first band of Personal Communication System (PCS) that is ranging from 800 to 900 MHz. One of the most important features of this kind of antenna is its wide bandwidth as required in the mentioned band. The modified design of the proposed antenna allows the user to move in any direction as is usual in mobile communications. The results of this article include an analytical design, simulations that have been performed numerically using a Finite Element Method (FEM) computational tool, structure optimization in order to maximize the antenna bandwidth and experimental measurements with the aim of spatial evaluating of electromagnetic radiated fields.

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Wang, Ben, Feng Jie Sun, Meng Yang, Xiang Zhen Li, and Ling Kang Zeng. "Application Research on TD-LTE Technology in Communication System of Power Distribution and Utilization Network." Advanced Materials Research 614-615 (December 2012): 1666–71. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1666.

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Firstly the current situation and demand of power wireless communication was analyzed, and the technical characteristics of a variety of wireless communication applicated in the area of distribution were summarized, then, Considering strict requirement for QoS, high data rate, mass uplink data, and a large number of users, a solution based on TD-LTE Technology is purposed for 230MHz broadband wireless transmission. Therefore, MIMO, OFDMA and Carrier Aggregation Technology are all improved to realize the broadband wireless transmission of power communication under the condition of discrete, narrowband carrier.

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Zhou, Jianming. "A Design of Dual Broadband Antenna in Mobile Communication System." International Journal of Antennas and Propagation 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/975825.

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A design of dual broadband antenna is proposed in this paper; it consists of one low frequency unit and two high frequency units. The low frequency unit consists of a pair of printing vibrators; the high frequency unit consists of a pair of printing oscillators, which is bent at its end, and high frequency unit and low frequency unit are set on the same dielectric substrate. Through adding a parasitic unit on antenna, it can enhance frequency bandwidth without affecting the bandwidth. In the high frequency unit, it adopts gap-coupled microstrip line feeding method in order to get enough bandwidth. Through the test of dual broadband antenna, it can be found that, in the low frequency part, the antenna covers 20% bandwidth of the total bandwidth, and it covers the frequency from 800 MHz to 980 MHz. In the high frequency, the antenna covers 60% of total bandwidth and its frequency is from 1540 MHz to 2860 MHz, so the designed antenna can satisfy the frequency requirements of 2G/3G/LTE (4G) communication system.

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Chen, Joy, and Lu-Tsou Yeh. "Optimization of Citizen Broadband Radio Service Frequency Allocation for Dynamic Spectrum Access System." December 2020 2, no. 4 (January 5, 2021): 143–48. http://dx.doi.org/10.36548/jsws.2020.4.001.

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With the increase in mobile broadband utilization, more spectrum release is recommended by the Federal Communications Commission for spectrum sharing under a three-tire system called Citizens Broadband Radio Service. The standardization, functional and operational necessities of this framework are defined by the Wireless Innovation Forum. If an unavoidable shipborne radar appears on the channel, the channel must be vacated by the lower tier users. The timing constraints on CBRS is also stringent. Wireless stations transmit short beacon frames termed as heartbeat signals. These signals consist of the wireless channel encryption data, Service Set Identifier (SSID) and other credential data. These signals also transmit commands to vacate a channel. The heartbeat interval, timing constraint and domain proxy features are analyzed in this paper. CBSD renunciation and spectrum acquisition is performed with the help of domain proxy based communication. The CBRS-SAS channel allocation algorithm is further investigated. The communication interoperability and network robustness can improved with the introduction of secondary SAS and secondary domain proxy respectively.

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Liang, Thow Yick. "Strategic exploitation of information and communication technology in the healthcare sector." Human Systems Management 21, no. 4 (November 11, 2002): 241–48. http://dx.doi.org/10.3233/hsm-2002-21403.

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Among the various industrial sectors in Singapore, healthcare was the first to exploit broadband technology. In 1997, the Singapore General Hospital installed a broadband backbone even before the technology was generally viable. Today, the system supports the transmission of high-quality X-rays, CT- and MRI-scanned images, and electrocardiogram. And the latest decision is to supplement the existing facilities with wireless technology. This paper examines the strategic use of infocomm technology in the healthcare sector focusing on some recent technologies such as electronic data interchange, the Internet, e-commerce, broadband network and wireless technology. The patient-friendliness and the intelligence level of the entire healthcare sector are also analyzed. Besides, the strong coupling between human minds and artificial infocomm systems in healthcare may have stretched the interactions between the two systems into the nonlinear domain. The consequences may be a more innovative development of new infocomm systems and a more strategic exploitation of infocomm technology.

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Tian, Ye, Yan Feng Ren, and Guang Hua Wang. "The Design of the Ethernet Meter Reading System Based on Broadband Power Line." Advanced Materials Research 490-495 (March 2012): 2755–59. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.2755.

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According to the current national conditions and the intelligent communities’ requirements on the electric energy metering system based on the broadband power line communication (PLC), this paper introduces a design program for achieving the remote meter reading through the broadband PLC technology. The system takes the high-performance single chip microcomputer and the Ethernet controller RTL8019AS as the core, the low-voltage power line as the medium of data communication, and makes the electronic meters access to the Ethernet via the broadband power line, thereby achieving the remote automatic meter reading. The multi-functional low-voltage power line remote meter reading system constituted by this system and the backstage management system together will have broad application prospects. In addition, this paper also makes a preliminary study on the reliability of the meter reading system.

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Jun, Xu, Wei Lu, and Gengxin Zhang. "Traffic Modelling and Simulation of Broadband LEO Satellite Communication System." IOP Conference Series: Materials Science and Engineering 452 (December 13, 2018): 042082. http://dx.doi.org/10.1088/1757-899x/452/4/042082.

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Su, D., D. Fu, T. N. C. Wang, and H. Yang. "Broadband Polarization Diversity Base Station Antenna for 3G Communication System." Journal of Electromagnetic Waves and Applications 22, no. 4 (January 2008): 493–500. http://dx.doi.org/10.1163/156939308784150254.

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Abduh Kamil Al-Fuhaidy, Farouk. "DFT-Based OFDMA System with Phase Modulation for Broadband Communication." American Journal of Electrical and Computer Engineering 3, no. 1 (2019): 1. http://dx.doi.org/10.11648/j.ajece.20190301.11.

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Wang, Ke, Ampalavanapillai Nirmalathas, Christina Lim, and Efstratios Skafidas. "Ultra-broadband indoor optical wireless communication system with multimode fiber." Optics Letters 37, no. 9 (April 27, 2012): 1514. http://dx.doi.org/10.1364/ol.37.001514.

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Benesl, Lukas, Petr Mlynek, Michal Ptacek, Vaclav Vycital, Jiri Misurec, Jan Slacik, Martin Rusz, and Petr Musil. "Cable Monitoring Using Broadband Power Line Communication." Sensors 22, no. 8 (April 14, 2022): 3019. http://dx.doi.org/10.3390/s22083019.

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Power line communication (PLC) is considered one of the possible communication technologies for applications in the field of smart metering, smart substations, smart homes, and recently for the management of renewable resources or micro grid control. This article deals with the use of PLC technology to determine the technical condition of the cable. This coefficient can help distribution system operators (DSO) to assess the condition of their cable routes. In this way, possible cable breakdowns and subsequent power outages can be prevented. The resulting methodology for calculating the coefficient is presented in two specific examples of routes, in which a significant benefit for DSO’s can be found.

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Lin, Bin, Ting Lin, Yang Ge, Rong Rong Wang, Yong Ping Guo, and Zhi Da Lin. "The Top Loading Antenna with Fractal Photonic Crystal Used in TD-LTE System." Advanced Materials Research 915-916 (April 2014): 1163–66. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.1163.

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The performance of antenna has the conclusive influence to the performance of mobile communication terminal; one excellent-performance antenna can improve the communication quality of communication device greatly. With the developing of broadband wireless communication technology, the fourth generation mobile communication technology has advanced day after day, and will turn into practical soon. This article aim at the demand of the fourth generation mobile communication technologys standard of TD-LTE, combined with the fractal technology, photonic crystal texture and top loading technique, designing a fractal photonic crystal top loading antenna which can work in 2.6GHz frequency band, and make simulate analysis to the performance of antenna and make the sample of antenna to test. The result from simulation and test shows this antenna has a low return loss and the work bandwidth is big, which is suitable for the fourth generation mobile communications TD-LTE system.

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S K, Rakshitha, and Nagaraju P. "Design of Broadband Microstrip Patch Antennas For Wireless System." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 4713–25. http://dx.doi.org/10.22214/ijraset.2022.46045.

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Abstract: Due to the requirement for small, high-speed, and wide-bandwidth systems, communication technologies have been pushed towards the fifth generation (5G). These types of radio communication systems demand new antenna designs that are more efficient. Because of this, the new system will be able to work with more devices and meet the higher quality standards that modern applications require. In this paper, Microstrip patch antenna designed in CST software, which is the better for time domain based simulation. According to simulated results return loss of rectangular patch antenna with slotted is -49.80 dB at 28 GHz and gain is 7.58 dBi, return loss of circular patch antenna is -12.42 dB at 37.52 GHz and gain is 5.57 dBi, which are the best results got by comparing the microstrip patch and slots antenna. The designed antennas can be used for aircraft, spacecraft, satellite, and missile applications, applications. The proposed antenna would work well for 5G mobile communication because it has the high throughput that is needed. The antenna is small and light, which makes it a good choice for devices with limited space

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Rybin, Vyacheslav, Timur Karimov, Oleg Bayazitov, Dmitriy Kvitko, Ivan Babkin, Kirill Shirnin, Georgii Kolev, and Denis Butusov. "Prototyping the Symmetry-Based Chaotic Communication System Using Microcontroller Unit." Applied Sciences 13, no. 2 (January 10, 2023): 936. http://dx.doi.org/10.3390/app13020936.

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Chaos-based communications are a promising application of chaos theory and nonlinear dynamics. Their key features include concealed transmission, high security, and native broadband signals. Many studies have recently been published devoted to this technology. However, the practical implementations of chaos-based communications are rare due to multiple shortcomings: high hardware requirements, complex signal processing algorithms, and a lack of efficient modulation techniques for chaotic signals. In this study, we consider a simple hardware prototype of a coherent chaos-based communication system based on a novel type of modulation: adaptive symmetry of the finite-difference scheme used in a chaos generator. We explicitly demonstrate the possibility of covertly transmitting data using a chaotic transmitter and receiver implemented in a general-purpose microcontroller unit. A comparison between traditional parameter and symmetry modulation is given through a return map analysis and bit error rate estimation. The communication secrecy is analyzed using quantified return map analysis. The obtained results confirm the possibility of creating chaos-based communication systems based on symmetry modulation.

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Buzenkov, I. I., A. A. Tyufanova, and E. P. Khaleeva. "On the possibility of organizing communication for e-Navigation in the coastal zone using radio-technical posts of the vessel traffic control system." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012110. http://dx.doi.org/10.1088/1742-6596/2061/1/012110.

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Abstract The concept of e-Navigation is to unify activities for the collection, integration, exchange, presentation and analysis of information on vessels and in coastal services through electronic technologies to improve the navigation safety, and the quality and efficiency of the relevant services.The generalized analysis of the obtained data is used to determine the appropriate actions in the prevailing conditions, to improve the process of the vessel’s transition from berth to berth (in ports of departure and destination) and the corresponding services that ensure the safety of navigation, environmental protection, information exchange between intelligent transport systems.The basis for fulfilling the assigned tasks are three basic components of e-Navigation: vessel systems; coastal and satellite systems; communication infrastructure. The purpose of the paper is the possibility of applying broadband radio communications for unmanned navigation in the coastal zone. The research object is the analysis of broadband communication systems; the subject is the assumed range of the WiMAX radio communication zone. EMC Planner 1.1_170328 is used to simulate the anticipated WiMAX radio zone.

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Kubrak, O. M., V. O. Cholpanov, and I. M. Dyukov. "ESTIMATION OF BIT ERROR PROBABILITIES OF COMMUNICATION SYSTEMS WITH FM BROADBAND SIGNALS." Проблеми створення, випробування, застосування та експлуатації складних інформаційних систем, no. 18 (December 30, 2020): 23–31. http://dx.doi.org/10.46972/2076-1546.2020.18.03.

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Today, wireless communication is one of the most promising areas in the field of communications. Modern radio communication systems and facilities operate in a complex electronic environment. The development of next-generation wireless networks depends on both transmitting and receiving equipment, which must provide the high data rates needed to maintain a reliable level of interference protection. The main factors influencing the quality of radio communication are natural and intentional interference in the radio wave propagation channel, multi-beam propagation, bandwidth limitation and the need for asynchronous access. One of the possible methods of partial solution of the above problems is the use of extended spectrum communication systems. The article investigates the effectiveness of different types of phase modulation used for Direct Sequence Spread Spectrum systems. An idealized channel with additive white Gaussian noise was chosen as the radio wave propagation channel. It has been observed that Binary phase shift keying radio systems achieve better Bit error rate values than other systems. The research was conducted in the environment of dynamic interdisciplinary modeling of complex technical systems - Simulink (the main tool for model-oriented design), whose main interface is a graphical tool for charting and a flexible set of libraries of functional blocks. The simulation results showed that for a given data rate and under the influence of AWGN on the propagation channel, DSSS-BPSK was more resistant to the negative effects of white noise. Future research will focus on evaluating the effectiveness of the SSS communication system in the event of different types of interference.

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S. Kavitha. "An Overview of Free Space Optics Communication System." December 2022 4, no. 4 (November 10, 2022): 222–29. http://dx.doi.org/10.36548/jsws.2022.4.001.

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Free space optics is a kind of broadband communication technique that transmits the signals, in the atmosphere through laser beams. In some cases, the laser beams are replaced with infrared and modified beams. Free Space Optics (FSO) is also referred as Free Space Photonics that works same as the principle of fiber optic communication where the source beams are transferred through air medium. In the traditional fiber optic communication, the optical fibers were used for transferring the beam signals. The FSO methodology is widely employed in various ubiquitous applications for their cost and deployment effectiveness. The motive of the work is to explore the concepts and theories behind the operation of different FSO models with their recent progress.

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O, Ajewole M., Owolawi P. A, Ojo J. S, and Adetunji R. M. "Fog and rain attenuation characterization and performance of terrestrial free space optical communication in Akure, Nigeria." APTIKOM Journal on Computer Science and Information Technologies 4, no. 3 (January 27, 2020): 125–34. http://dx.doi.org/10.34306/csit.v4i3.100.

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Reliable broadband communication requires secure high data rate and bandwidth links. With the observedincrease in broadband users, known communication systems such as RF and microwave links cannot promise suchrequirements due to link interference and low bandwidth. A current communication system that promises suchrequirements and more is Free Space Optical (FSO) communication. This system basically involves the transmissionof signal-modulated optical radiation from a transmitter to a receiver through the atmosphere or outer space. However,location-variant atmospheric channel degrades the performance of an FSO system under severe atmosphericconditions, thus necessitating local atmospheric attenuation studies.This paper presents the characterization of both fog- and rain-induced attenuation and the performance ofan FSO system in a terrestrial terrain at Akure, Nigeria. One-year archived visibility data and in-situ measured 1-minute integration time rain rate data obtained from Nigerian Meteorological Agency (NIMET) and the Departmentof Physics, Federal University of Technology, Akure were used to compute the fog- and rain-induced specificattenuations using Kruse model and Carboneur model respectively. The performance of the FSO system is analyzedthrough link margin by using the parameters of a commercial optical transceiver, Terescope 5000.

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Ojo, Joseph Sunday, Owolawi P. A., Ajewole M. O., and Adetunji R. M. "Fog and Rain Attenuation Characterization and Performance of Terrestrial Free Space Optical Communication in Akure, Nigeria." APTIKOM Journal on Computer Science and Information Technologies 4, no. 3 (November 1, 2019): 125–34. http://dx.doi.org/10.11591/aptikom.j.csit.151.

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Reliable broadband communication requires secure high data rate and bandwidth links. With the observed increase in broadband users, known communication systems such as RF and microwave links cannot promise such requirements due to link interference and low bandwidth. A current communication system that promises such requirements and more is Free Space Optical (FSO) communication. This system basically involves the transmission of signal-modulated optical radiation from a transmitter to a receiver through the atmosphere or outer space. However, location-variant atmospheric channel degrades the performance of an FSO system under severe atmospheric conditions, thus necessitating local atmospheric attenuation studies. This paper presents the characterization of both fog- and rain-induced attenuation and the performance of an FSO system in a terrestrial terrain at Akure, Nigeria. One-year archived visibility data and in-situ measured 1-minute integration time rain rate data obtained from Nigerian Meteorological Agency (NIMET) and the Department of Physics, Federal University of Technology, Akure were used to compute the fog- and rain-induced specific attenuations using Kruse model and Carboneur model respectively. The performance of the FSO system is analyzed through link margin by using the parameters of a commercial optical transceiver, Terescope 5000.

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Tang, Xiaoke, Rui Wang, Yubo Wang, Dongyan Zhao, Xu Zhao, and Yubing Zhang. "The networking performance analysis of wireless broadband communication in electricity system." Journal of Physics: Conference Series 1738 (January 2021): 012045. http://dx.doi.org/10.1088/1742-6596/1738/1/012045.

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Victor, Crallet, and Nixon Mtonyole. "Design of Multicarrier Broadband Power Line Communication System for Tanzania Homes." International Journal of Computer Applications 100, no. 14 (August 20, 2014): 25–32. http://dx.doi.org/10.5120/17595-8380.

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Tang, Xiaoke, Rui Wang, Yubo Wang, Dongyan Zhao, Xu Zhao, and Yubing Zhang. "The traffic performance analysis of wireless broadband communication in electricity system." Journal of Physics: Conference Series 1654 (October 2020): 012032. http://dx.doi.org/10.1088/1742-6596/1654/1/012032.

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Gao, Lijuan, Long Chen, and Fengkun Yu. "The Research on Effectiveness Evaluation of Mobile Broadband Wireless Communication System." Journal of Physics: Conference Series 1634 (September 2020): 012061. http://dx.doi.org/10.1088/1742-6596/1634/1/012061.

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Rao, Raghu, Stephan Lang, and Babak Daneshrad. "Field Measurements with a 5.25 GHz Broadband MIMO-OFDM Communication System." IEEE Transactions on Wireless Communications 6, no. 8 (August 2007): 2848–59. http://dx.doi.org/10.1109/twc.2007.05571.

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TIAN, Qing-hua, Qi ZHANG, Ying TAO, Nai-jin LIU, Xiang-jun XIN, Li-jia ZHANG, and Da-xiong XU. "Performance analysis of broadband satellite communication system based on OFDM/TDM." Journal of China Universities of Posts and Telecommunications 20, no. 3 (June 2013): 37–77. http://dx.doi.org/10.1016/s1005-8885(13)60046-1.

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Shui, Xiao Zhong, Wei Wang, Kai Zhou, and Xin Lv. "A Broadband Septum Dual Circular Polarized Antenna for Airborne Communication System." Applied Mechanics and Materials 380-384 (August 2013): 3461–64. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3461.

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In this paper, a broadband septum dual circular polarized antenna with dielectric loaded is designed. In order to expand the bandwidth, the antenna uses the form of dielectric loaded in the waveguide and extends the dielectric to meet the miniaturization requirements, which can improve the Gain and the matching of waveguide. The simulation results show that in the 40% relative bandwidth, the VSWR is lower than 1.7. The isolation between the two input ports is lower than-10dB. Gain is larger than 7.5dB and the axial ratio is lower than 3.5dB.

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Wang, Zhipeng, Bing-Zhong Wang, Deshuang Zhao, and Ren Wang. "Full Analog Broadband Time-Reversal Module for Ultra-Wideband Communication System." IEEE Photonics Journal 11, no. 5 (October 2019): 1–10. http://dx.doi.org/10.1109/jphot.2019.2936501.

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Ohata, Kohei, Kiyoshi Kobayashi, Katsuya Nakahira, and Masazumi Ueba. "Broadband and scalable mobile satellite communication system for future access networks." Acta Astronautica 57, no. 2-8 (July 2005): 239–49. http://dx.doi.org/10.1016/j.actaastro.2005.03.028.

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Wang, Yan, Shaohe Li, Hui Wang, Longcheng Feng, Bowen Tan, Yihui Tan, Runfeng Su, et al. "Broadband and efficient asymmetric wavefront manipulation via terahertz polarization-selective metasurface." Applied Physics Letters 121, no. 15 (October 10, 2022): 151701. http://dx.doi.org/10.1063/5.0101731.

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Asymmetric manipulation of electromagnetic waves exhibits tremendous capabilities in the applications of encryption, ultrafast information processing, and communication. However, compact and broadband terahertz (THz) components for asymmetric applications are still scarce. Here, we demonstrate broadband, ultrathin, and efficient metasurface-based asymmetric transmission and wavefront manipulation in the THz region. The metasurface consists of tri-layer metallic structures separated by two flexible polyimide dielectrics. This ultrathin structure exhibits superior asymmetric response which can act as an efficient device with a high linear polarization conversion ratio over 0.9 ranging from 0.5 to 1.1 THz. We also develop THz asymmetric applications based on the flexible metasurface for beam deflector and orbital angular momentum generation. The THz time-domain spectroscopy system and spectral imaging system are used to characterize the broadband asymmetric properties. The experimental results confirm that the beam deflection and vortex waves can be realized over broadband under one linearly polarized incidence while blocked under its orthogonal incidence. This work may provide a promising route to achieve broadband asymmetric applications in information encryption, THz wireless communication, and spectroscopy applications.

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Huang, Bin Wen, and Yuan Jiao. "Design of Wireless Microwave Transmission System." Applied Mechanics and Materials 441 (December 2013): 959–62. http://dx.doi.org/10.4028/www.scientific.net/amm.441.959.

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As a high-frequency and broadband wireless transmission system [, wireless microwave transmission system plays an important role in wireless communication family, especially in newest WiMax and 4G technology. Wireless microwave transmission system can be separated by indoor unit (IDU) and outdoor unit (ODU). This paper is focused on the design of IDU and ODU.

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Cha, Junghoon, Choon-Seong Leem, Ikhwan Kim, Hakyoung Lee, and Hojun Lee. "Broadband Dual-Polarized 2 × 2 MIMO Antenna for a 5G Wireless Communication System." Electronics 10, no. 17 (September 2, 2021): 2141. http://dx.doi.org/10.3390/electronics10172141.

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In this study, we proposed an indoor broadband dual-polarized 2 × 2 MIMO (multiple-input and multiple-output) antenna having dimensions of 240 mm × 200 mm × 40 mm, for application in 5G wireless communication systems. The proposed antenna comprised two vertically polarized circular monopole antennas (CMAs), two horizontally polarized modified rectangular dipole antennas (MRDAs), and a ground plane. The distance between the two MRDAs (MRDA1 and MRDA2) was 70.5 mm and 109.5 mm in the horizontal (x-direction) and 109.5 mm vertical (y-direction) directions, respectively. Conversely, the distance between the two CMAs (CMA1 and CMA2) was 109.5 mm and 70.5 mm in the horizontal (x-direction) and vertical (y-direction) directions, respectively. While the CMAs achieved broadband characteristics owing to the optimal gap between the dielectric and the driven radiator using a parasitic element, the MRDAs achieved broadband owing to the optimal distance between the dipole antennas. The observations in this experiment confirmed that the proposed could operate in the 5G NR n46 (5.15–5.925 GHz), n47 (5.855–5.925 GHz), n77 (3.3–4.2 GHz), n78 (3.3–3.8 GHz), and the n79 (4.4–5 GHz) bands. Moreover, it exhibited a wide impedance bandwidth (dB magnitude of S11) of 101% in the 2.3–7 GHz frequency range, high isolation (dB magnitude of S21), low envelope coefficient correlation (ECC), gain of over 5 dB, and average radiation efficiency of 87.19%, which verified its suitability for application in sub-6 GHz 5G wireless communication systems.

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Esa, Mazlina, Nik Noordini Nik Abd. Malik, Mohd Khairul Hisham Ismail, and Shipun Anuar Hamzah. "Performance Investigation of Microstrip Klopfenstein Tapered Line Impedance Transformer Using MathCAD Software for Communication System." Applied Mechanics and Materials 781 (August 2015): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amm.781.57.

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Impedance transformer is highly desirable in systems such as microwave communication systems for compensating impedance mismatches. Such device that can perform over broadband frequencies find numerous applications. This article presents the design and investigation of a microstrip Klopfenstein tapered line impedance transformer, KTLI. In ideal condition, it must possess minimum passband reflection coefficient for a given taper length. For specific reflection coefficient, there is a minimum value of taper length. The investigation is based on analytical equations which were computed using MathCAD. The reflection coefficient and return loss responses were found to be in good agreement with theory. Broadband characteristics were observed.

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Bao, Song Jian. "LED Visible Light Communication System Design and Performance Optimization Based on Ethernet." Applied Mechanics and Materials 336-338 (July 2013): 1920–24. http://dx.doi.org/10.4028/www.scientific.net/amm.336-338.1920.

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To satisfy the requirements of visible light wireless communication technology, designed LED visible light communication application system based on Ethernet. Influence factors of system performance were studied and took specific measures to optimize system performance. Reduced the influence of background light, improved the communication distance, inhibited LED light source tailing phenomenon, and improved the rate of the edge of the LED. The LED visible light communication technology blends into the Ethernet, provides a new solution for wireless broadband access, this solution has the broad application prospect.

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Journal articles on the topic 'Broadband communication system'

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