• Title/Summary/Keyword: Optic communication

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Implementation of Fiber Optic and Wireless Complex Communication Network for Distribution Automation using IEEE 802.11a WLAN technology (IEEE 802.11a WLAN 기술의 사용에 의한 배전자동화용 광무선 복합통신망의 구현)

  • Hwang, Jin-Kwon;Choi, Tae-Il
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.10
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    • pp.49-57
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    • 2010
  • In order to provide electricity to users economically and safely, distribution automation systems (DASs) monitor and operate components of distribution systems remotely through communication networks. The fiber optic communication network has been mainly installed for the DAS of Korea Electric Power Corporation (KEPCO) because of its huge bandwidth and dielectric noise immunity. However, the fiber optic communication network has some shortcomings that its installation cost and communication fee are expensive. This paper proposes a complex network where WLANs are combined with conventional fiber optic communication networks in order to expand DAS easily and inexpensively. A fixed wireless bridge communication unit (FWB-CU) for the proposed complex network is implemented using IEEE 802.11a WLAN technology. The proposed complex network is built actually to verify its feasibility experimentally as a DAS communication network.

Analysis of Fiber-optic Link Budget for Optically fed Wireless Communication

  • Kim, Jung-Tae
    • Journal of information and communication convergence engineering
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    • v.1 no.1
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    • pp.35-38
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    • 2003
  • Analyses of performance of wireless broadband communication systems employing fiber-optic link have presented. We have analyzed CNR penalty to evaluate system performance by taking into account, radio link considering rainfall attenuation, and optical link considering several carrier-to-noise ratio versus the optical modulation index.

Sturdy on the Optimal Search Algorithm for the Automatic Alignment of Fiber Optic Components (광부품 정렬 자동화를 위한 최적 탐색 알고리즘 연구)

  • 지상우;임경화;강희석;조영준
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.10a
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    • pp.451-454
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    • 2002
  • The fiber optic communication technology is considered as a key solution for the future communication. However the assembly of the fiber optic components highly depends on manual or semi-automated alignment process. And the light search algorithm is recognized an important factor to reduce the manufacturing process time. Therefore this paper investigates optimal search algorithm for the automatic alignment of fiber optic components. The experiments show the effectiveness of Hill Climbing Search, Adaptive Hill Climbing Search and Steepest Search algorithms, in a view of process time.

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Protection System Against The Infringement of Information Signals in Fiber Communication System (광섬유 통신 시스템의 정보 신호 침해에 대한 보호 시스템)

  • Ugli, Sobirov Asilzoda Alisher;Umaralievich, Nishonov Ilhomjon;Kim, Daeik
    • The Journal of the Korea institute of electronic communication sciences
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    • v.17 no.2
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    • pp.219-228
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    • 2022
  • One of the most pressing and demanding issues today in the conditions of widespread transformation and digitalization of spheres of human activity is information security and ensuring the integrity of data. The main research and development in the field of information security is aimed at improving efficiency and rationalization. One of the main means of data transmission and operation of information complexes are fiber-optic systems. To date, there have been incidents of illegal intrusion and theft of information, passing through this type of communication. Thus, today there is a problem associated with insufficient information security in fiber-optic data transmission systems. One of the most effective tools to counter acts of illegal interference in systems are artificial intelligence and cryptographic algorithms of information protection. It is the symbiosis of these two tools that can qualitatively improve the level of information security in fiber-optic data transmission systems. Thus, the authors of this article pursue the goal associated with the description of an innovative system for protecting information from violations in fiber-optic data transmission systems based on the integration of intelligent cryptographic algorithms.

Implementation of Quick fit, High Performance Outdoor Optical Connector for 4G Mobile Communication System (4G 이동통신기반 초간편 접속 고기능 광커넥터의 구현)

  • Lee, Young-Chur;Kim, Chul-Gyun;Cheon, Seung-Chang;Juong, Woo-Youn
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.10 no.3
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    • pp.110-114
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    • 2011
  • The recent development of 4G mobile communication system has led to the rapid technology shift from conventional repeater systems using coaxial cable links towards new fiber optic repeater systems using fiber-optic links between the base station and the outdoor fiber optic repeater. The technical changes have brought up the increasing needs of robust optic links that can be used in harsh environments. Based on the most demanding requirements, a new outdoor optical connector employing 2-channel fiber optics, uplink and downlink, has been developed for the applications where the rugged environmental protection is essential. This paper describes the development of the new connector along with the design criteria and performance results. In summarizing, the prototype optical connectors have undergone extensive laboratory and field test, and they have shown exceptional optical and mechanical characteristics under extreme environmental conditions. The connectors have also exhibited capabilities of providing fast and easy installation while maintaining high performance fiber optic connections.

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Design of 10Gbps CMOS Receiver Circuits for Fiber-Optic Communication (광통신용 10Gbps CMOS 수신기 회로 설계)

  • Park, Sung-Kyung;Lee, Young-Jae;Byun, Sang-Jin
    • Journal of IKEEE
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    • v.14 no.4
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    • pp.283-290
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    • 2010
  • This study is on the design of 10Gbps CMOS receiver circuits for fiber-optic communication. The receiver is made up of a photodiode, a transimpedance amplifier, a limiting amplifier, an equalizer, a clock and data recovery loop circuit, and a demultiplexer or demux with some auxiliary circuits including I/O circuits. Various wideband or high-speed circuit techniques are harnessed to realize a feasible, effective, and reliable receiver for a SONET fiber-optic standard, OC-192.

Design of Algorithm for maximum Signal Sensing by Optical System (광시스템에서 maximum 신호 Sensing을 위한 Algorithm 설계)

  • Choi, Do-Sun
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.3 no.4
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    • pp.70-75
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    • 2010
  • In this paper, was designed Algorithm Brent. this Algorithm can be used in the medical optical system. Optical signals are transmitted using optical fibers and integrated Optic. Developed Algorithm finds the maximum of the transmitted signal intensity. Optical system is made for Laser-Diode, HeNe-Laseer, controller for stepping motor, glass fiber and integrated Optic, etc. In this paper, two algorithms were investigated.

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Research on Damage Identification of Buried Pipeline Based on Fiber Optic Vibration Signal

  • Weihong Lin;Wei Peng;Yong Kong;Zimin Shen;Yuzhou Du;Leihong Zhang;Dawei Zhang
    • Current Optics and Photonics
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    • v.7 no.5
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    • pp.511-517
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    • 2023
  • Pipelines play an important role in urban water supply and drainage, oil and gas transmission, etc. This paper presents a technique for pattern recognition of fiber optic vibration signals collected by a distributed vibration sensing (DVS) system using a deep learning residual network (ResNet). The optical fiber is laid on the pipeline, and the signal is collected by the DVS system and converted into a 64 × 64 single-channel grayscale image. The grayscale image is input into the ResNet to extract features, and finally the K-nearest-neighbors (KNN) algorithm is used to achieve the classification and recognition of pipeline damage.