Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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NLOS Propagation Characteristics in a Curved Subway Tunnel

지하철 곡선 터널에서의 NLOS 전파 특성

  • 정회동 (원광대학교 제어 계측학과) ;
  • 윤찬의 (KT 서비스 개발 연구소) ;
  • 강영진 (원광대학교 제어 계측학과) ;
  • 송문규 (원광대학교 제어 계측학과)
  • Published : 2003.07.01
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Abstract

In this paper, path loss characteristics in a curved subway tunnel are measured and analyzed. The measurement is carried out in the frequency bands of 2.45GHz and 5.8GHz. A directional antenna is employed for transmission and an omnidirectional antenna for reception. This measurement is performed in the subway tunnel in the vicinity of the Daejon station. The tunnel is curved and its cross section is arch-shaped. The path loss is measured with the location of the transmitter antenna fixed and the receiver antenna moving in the tunnel. The measured path loss ratio is about 0.1dBm/m. Also, the signal received from the antenna located on the outer side of curve in the tunnel experiences weaker path loss.

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