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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.6
- 수록면
- 19 - 27 (9page)
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In railway tunnel environment, the reliability of a high-data-rate and real-time train-to-wayside communication should be maintained especially when high-speed train moves along the track. In China and Europe, the communication frequency around 900 MHz is widely used for railway applications. At this carrier frequency band, both of the solutions based on continuously laid leaky coaxial cable (LCX) and discretely installed base-station antennas (BSAs), are applied in tunnel radio coverage. Many available works have concentrated on the radio-wave propagation in tunnels by different kinds of prediction models. Most of them solve this problem as natural propagation in a relatively large hollow waveguide, by neglecting the transmitting/receiving (Tx/Rx) components. However, within such confined areas like railway tunnels especially loaded with train, the complex communication environment becomes an important factor that would affect the quality of the signal transmission. This paper will apply a full-wave numerical method to this case, for considering the BSA or LCX, train antennas and their interacted environments, such as the locomotive body, overhead line for power supply, locomotive pantograph, steel rails, ballastless track, tunnel walls, etc.. Involving finite-difference time-domain (FDTD) method and uni-axial anisotropic perfectly matched layer (UPML) technique, the entire wireless RF downlinks of BSA and LCX to tunnel space to train antenna are precisely modeled (so-called integrative modeling technique, IMT). When exciting the BSA and LCX separately, the field distributions of some cross-sections in a rectangular tunnel are presented. It can be found that the influence of the locomotive body and other tunnel environments is very significant. The field coverage on the locomotive roof plane where the train antennas mounted, seems more homogenous when the side-laying position of the BSA or LCX is much higher. Also, much smoother field coverage solution is achieved by choosing LCX for its characteristic of more homogenous electromagnetic wave radiation.
목차
Abstract
1. Introduction
2. Theory and method
3. Numerical results and discussion
4. Conclusions
References
참고문헌 (11)
참고문헌 신청
1. [학술대회논문] - S. Pu / 2009 / Research on the receiving and radiating characteristics of antennas on high-speed train using integrative modeling technique / The 11th Asia-Pacific Microwave Conference 2009 : 1072 ~ 1075
2. [학술지(정기간행물)] - S. Pu / 2010 / Estimation for small-scale fading characteristics of RF wireless link under railway communication environment using integrative modeling technique / Progress In Electromagnetics Research-PIER 106 : 395 ~ 417
3. [학술지(정기간행물)] - Y. P. Zhang / 1998 / Theory of the radio-wave propagation in railway tunnels / IEEE Transactions on Vehicular Technology 47 (3) : 1027 ~ 1036
4. [학술지(정기간행물)] - A. M. Ghuniem / 2005 / Modes of electromagnetic wave propagation in circular concrete tunnels / Journal of Electromagnetic Waves and Applications 19 (1) : 95 ~ 106
5. [학술지(정기간행물)] - C. Briso-Rodríguez / 2007 / Measurements and modeling of distributed antenna systems in railway tunnels / IEEE Transactions on Vehicular Technology 56 (5) : 2870 ~ 2879
2. [학술지(정기간행물)] - S. Pu / 2010 / Estimation for small-scale fading characteristics of RF wireless link under railway communication environment using integrative modeling technique / Progress In Electromagnetics Research-PIER 106 : 395 ~ 417
3. [학술지(정기간행물)] - Y. P. Zhang / 1998 / Theory of the radio-wave propagation in railway tunnels / IEEE Transactions on Vehicular Technology 47 (3) : 1027 ~ 1036
4. [학술지(정기간행물)] - A. M. Ghuniem / 2005 / Modes of electromagnetic wave propagation in circular concrete tunnels / Journal of Electromagnetic Waves and Applications 19 (1) : 95 ~ 106
5. [학술지(정기간행물)] - C. Briso-Rodríguez / 2007 / Measurements and modeling of distributed antenna systems in railway tunnels / IEEE Transactions on Vehicular Technology 56 (5) : 2870 ~ 2879
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UCI(KEPA) : I410-ECN-0101-2014-004-001391549