The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Analysis of Propagation Environments for Indoor Wireless Communication Systems at THz Frequencies

THz 실내 무선 통신시스템을 위한 전파환경 분석

  • Received : 2010.03.02
  • Published : 2010.04.30
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Abstract

Short-range wireless communication systems are expanding at rapid rate, finding application in offices and homes. Development of wireless local network is accompanied by steady increase in the demand for ever higher data rates. This in turn entails the necessity to develop communication systems which operate at higher frequencies. It can be expected that short-rage wireless communication networks will soon push towards the THz frequency range. We use a 3D ray-launching for analysis of propagation environments at the indoor fixtures. We extended the approach from the modeling of the reflectivity of optically thick, smooth building materials at THz frequencies to materials with a rough surface. The simulation result of propagation environment is similar to average received power of reference paper. The RMS delay spread was calculated to be 9.11 ns in a room size of $6m(L){\times}5m(W){\times}2.5m(H)$ for the concrete plaster.

근거리 무선 통신시스템은 사무실과 가정의 응용으로 빠르게 확장하고 있다. 무선 네트워크의 개발은 더 높은 data rate의 요구를 만족하도록 수행되었다. 이것으로 높은 주파수에서 동작하는 통신시스템 개발의 필요성이 강조된다. 따라서 근거리 무선 통신 네트워크는 테라헤르츠 주파수 쪽으로 옮겨갈 것으로 기대된다. 실내의 벽과 바닥, 천장에 의해 발생하는 전파 환경 분석은 3차원 광선방출기법을 이용하였다. 또한 테라헤르츠 주파수에서의 rough한 건물 벽면의 특성을 파악하기 위해 광학적으로 두꺼운 smooth한 건물 재질의 반사 모델로부터 접근하여 나타내었다. 전파환경 시뮬레이션 결과평균 수신 전력이 참고문헌의 결과와 유사한 결과를 얻을 수 있었다. 또한, 실내 공간의 크기가 $6m(L){\times}5m(W){\times}2.5m(H)$에서 콘크리트 벽의 경우 RMS 지연시간은 9.11 ns로 계산되었다.

Keywords

References

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