• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.2
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• pp.59-63
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• 2009

The UTP cable has been widely used, recently it is being developed for use in the UHF frequency band. One important characteristic of the UTP cable is NEXT. This research is to develop a pitch selection technique for an UTP cable which leads to a satisfactory NEXT. The transmission line model involving mutual inductances and capacitances between line pairs is used, and the simulation was carried out for frequencies from 1 MHz to 600 MHz. With respect to the worst margin of the NEXT for a Cat. 6 cable the simulation and measurement results show a good agreement.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37A no.12
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• pp.1115-1121
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• 2012

In this paper, the design of UTP LAN cable with enhanced alien crosstalk characteristic is proposed. Proposed LAN cable is made with jacket of the irregularly corrugation type. If necessary, it is possible to use the special cross-filler. The alien crosstalk characteristic is enhanced by using proposed cable with inner jacket of the irregularly corrugation type in wide frequency band. The design of the cable was based on parameters of the standard EIA/TIA 568-B.2-10.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.10B
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• pp.1150-1158
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• 2011

More than 100 Mbps rate is needed in the UBcN for a subscriber to receive broadband traffics with multi-channel like UDTV or 3DTV. Although the optical fiber is recently deployed for the FTTH, the UTP is the most widely used medium and will be used in UBcN age. Network providers may consider the 1000BASE-T or the vectorized VDSL if they adopts the UTP in the place where does not have optical fibers. But UTP should be expanded because 1000BASE-T and vectorized UTP needs 4 and 3 pairs cable, respectively while residential region has not exceeding 2 pair UTP cable. To solve the problem, we propose a 500BASE-T technology using 2 pairs UTP in this paper. The technology introduces a rate adaptation sublayer and a SERDES sublayer above and under the PCS, respectively. The rate adaptation sublayer is compatible for the GMII. Also, if we modify the SERDES sublayer, the technology can easily obtain 250BASE-T with 2 pairs UTP. We implement such functions with FPGA and analog board and verify the function of rate adaptation and symbol vector synchronization, and effective transmission rate by experiments. In particular, we show that link efficiency is increased by enable control in the rate adaptation sublayer.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.245-245
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• 2004

• Proceedings of the IEEK Conference
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• 2003.11c
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• pp.11-14
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• 2003

10GBASE-T is 10Gigabit Ethernet over horizontal structured, twisted-pair copper cabling.(1) It aims to transmit data at a speed of 10Gbps at a l00m distance away, through UTP (unshielded twisted -pair) Cat-5e cable 4-pair. This paper looks over the characteristic of media over Cat 5e, 6, 7, and then suggests how much noise should be removed from it in order to offer the transmission speed of 10Gbps as sending data through each physical medium.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.3B
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• pp.446-455
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• 2000

In this paper, we analyzed the reach performance of the FLC-C VDSL system using 4-CAP modulation scheme. We measured the attenuation of VDSL lines and their noise characteristics, and calculated the channel capacity. And then, we evaluated the VDSL coverage fro each type of cables; CPEV 0.5mm, CPEV 0.65mm, UTP3 0.5mm, UTP5 0.5mm, FS 0.4mm, FS 0.5mm. In case that FLC-C VDSL modern transmits 25.92 Mbps data over a UTP5 0.5mm cable, the VDSL reach appears to be about 570mm.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.28 no.9
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• pp.698-706
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• 2017

The risk of high power electromagnetic(HPEM) pulse exposure to the devices used in digital control system such as PLC(programmable logic controller) and communication cable is increasing. In this paper, two different frequency ranges HPEMs were exposed to those control systems to assess the each vulnerability. The vulnerability of the EUTs exposed from HPEM were analyzed and compared with a variation of distances and source power. As the EUTs were exposed to higher level of HPEM, the voltage and communication waveform of the control system had shown a distorted response. And the unshielded twisted pair(UTP) cable connected to the EUTs showed operation failures with induced voltage. However, the foiled twisted pair(FTP) cable shielded the connected device efficiently from the HPEM exposure. Therefore, the necessity of the protection measures against the vulnerability of HPEM exposure for the digital control system used in power facilities and industrial site were verified.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.41-44
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• 2013

As appearance of high-quality service such as UDTV application, high-speed and high-capacity communication services are required. For this, communication systems increase the data processing speed and use various error correction techniques. In this paper, we implement the Viterbi decoder applied in 1000BASE-T with 4 pairs UTP cable. The minimum operating speed of the Viterbi decoer should be more than 125 MHz because 125 MHz PAM-5 signal is transmitted on each pair of cables in 1000BASE-T. To do this, we implement the decoder by using the pipeline and parallel processing and verify the operation with 125 MHz by using a logic analyzer. Finally, we will show that the decoder recovers the original data for the added random error data.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.11a
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• pp.223-224
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• 2019

TV홈쇼핑 Full-HD(High Definition)로 제작, 송출되어 시청자가 시청하게 된다. 대부분의 장비들은 Coaxial Cable로 각 장비 간의 신호를 전달하며 제작, 송출되어 진다. 현재 IP기반의 제작 형태가 나오기 시작하며 UHD(Ulitra-HD) 제작 시스템에서는 IP 시스템 방식에 대해 이슈화가 되고 있다. 본 논문에서는 홈쇼핑 Full HD 생방송 제작에서 네트워크 케이블인 UTP(Unshielded Twisted Pair) 케이블을 이용하여 생방송 방송시스템 설계에 관한 것이다. 네트워크를 이용하여 다양한 확장성 및 생방송 방송시스템에 활용된 네트워크 시스템을 제시하고자 한다.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.73-74
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• 2006

In this paper, we designed, constructed and evaluated the system for the FTTH suited to a residence and apartment using CWDM-PON techniques. These systems have capacity to service at 100Mbps rate to 384 users in the same breath. Also, the services include the internet, CATV, IPTV and wireless LAN. In the case of wire network, the data could be transmitted by UTP cable and optical fiber and case of wireless one, the data transmitted using WLAN. The distance between the cental office and the user is 20km and the data rate is 100Mbps maximum. Of course, the optical network used just one fiber optical core. For the basic material, we obtained the characteristics of optical transceiver module, Mux/Demux and transmission qualities depends on the environment.