국내환경에 적합한 밀리미터파대역에서의 강우감쇄 추정

Estimation of Rain-Attenuation for Millimeter-Wave Propagation in Domestic Environments

  • 조삼모 (한국전자통신연구원 전자응용연구실) ;
  • 김양수 (충남대학교 전파공학과) ;
  • 백정기 (충남대학교 전파공학과) ;
  • 이성수 (한국전자통신연구원 전자응용연구실) ;
  • 김혁제 (한국전자통신연구원 전자응용연구실)
  • 발행 : 1998.07.01

초록

약 10GHz 이상의 주파수를 사용하는 무선 채널에서 채널의 가용도는 강우감쇄에 심각한 영향을 받는다. 강우감쇄의 영향은 주파수와 지역적 상황에 따라 다르다. 본 논문에서는 국내환경에 적용할 수 있는 밀리미터파대역의 강우감쇄를 추정하였다. 빗방울 크기분포는 지수분포로 가정하였고, 빗방울 크기분포를 변화시켜가며 국내환경과 유사한 여러나라의 측정치를 비교하고 분석하여 국내환경에 적용시킬 수 있는 빗방울 크기분포를 보였다. 또한, r분 강우율을 1분 강우율로 변환할 수 있는 변환모델을 논하고 이를 적용하여 변환한 국내의 강우율데이타를 이용하여 강우감쇄의 확률분포를 계산하였다.

The rain attenuatio of a radio channel above 10 GHz can have impact on the availability of the radio channel. The severity of the rain impairments increases with frequency and varies with regional location. This paper presents an estimation method for rain attenuation for millimeter-wave propagation in domestic environments. the dropsize distribution is assumed to be exponential, and the measurement data in the various countries which are simlar to the domestic environments are compared with the theoretical one by varying the dropsize distribution. A rain-rate conversion model which can convert .tau.-minutes rain-rate data to 1-minute rain-rate data for domestic environments is also discussed. Using the converted domestic rain-rate data, probabilty distributions of rain attenuation are computed.

키워드

참고문헌

  1. 통신학회 제출중 무선 CATV 환경에 대한 무선 채널특성의 예측 백정기;고욱희;박동철;김양수;송기홍;함영권
  2. ITU-R Rec.837-1 Characteristics of Precipitation for Propagation Modeling
  3. IEEE Trans. Antennas Propagat. v.26 no.2 The aRb Rlation in the Calculation of Rain Attenuation R. L. Losen;D. V. Rogers;D. B. Hodge
  4. COMSAT Tech. Rev. v.13 no.2 Multiple Scattering inCoherent Radio-Wave Propagation Through Rain D. V. Rogers;R. L. Olsen
  5. Proc.IEEE v.71 no.9 Electomagnetic Wave Propagation and Scatteing in Rain and Other Hydrometeors T. Oguchi
  6. Traans. American Geophy. Union v.24 The Relation of Raindrop-Size to Intensity J. O. Laws;D.A.Parsons
  7. IEICE Trans. v.E67 no.4 Inference of Raindrop Size Distribution form Rain Attenuation Statistics at 12,35 and 82 GHz T. Ihara;Y. Furuhama;T. Manabe
  8. IEEE Trans. Antennas Propagat v.32 no.5 Inference of Raindrop Size Distribution from Attenuation and Rain Rate Measurement T. Manabe;T. Ihara;Y. Furahama
  9. IEE Proc. Microw. Antennas Propag. v.144 no.3 Weibull Raindrop-Sie Distribution and Its Application to Rain Attenuation H. Jiang;M. Sano;M. Sekino
  10. Electron. Lett. v.33 no.10 Generalized Mathematical Model for Raindrop Size Distribution(RSD) for Application in Radiowave Propagation and Metheorological Studies K. I. Timothy;S. K. Sarkar
  11. Radio Sci. v.30 no.4 Inference of Raindrop Size distribution from Measurements of Rainfall Rate and Attenuation at Infrared Wavelengths Maitra;C. J. Gibbins
  12. IEEE Trans. Attennas v.35 no.11 The Relationship of Raindrop-Size Distribution to Attenuation Experenced at 50, 80, 140, and 240GHz T. Manabe (et al.)
  13. IEICE Trans. Comm. v.E.77-B no.10 Applicability of Specific Rain Attenuation Models at Milimeter Wavelengths T. Ihara
  14. CRC Report no.1351-E Rain Attenuation Statistics for Terrestrial Microwave Links in Canada B. Segal
  15. Int. J. Satellite Comm. v.13 Modeling of the Rainfall Rate Cumulative Distribution for the Design of Scatellite and Terrestrial Communication Systems F. Moupfouma;L. Martin
  16. 전자파학회 제출중 강우환경에서의 밀리미터파의 전파 특성 김양수;백정기;이성수;조삼모;김혁제
  17. ITU-R Rec. 530-5 Aspects Relative to the Terrestrial Fixed Service