Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis of Prediction Models for DTV Field Strength in Domestic Rural Propagation Environment

국내 Rural 전파환경에서의 DTV 전계강도 예측모델 분석

  • Kang, Young-Heung (Dept. of Information & Telecommunication Eng., Kunsan National University) ;
  • Chung, Jae-Pil (School of Information Eng., Gachon University)
  • 강영흥 (군산대학교 정보통신공학과) ;
  • 정재필 (가천대학교 정보공학부)
  • Received : 2013.10.24
  • Accepted : 2013.12.30
  • Published : 2013.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

For the efficient use of the insufficient frequency resources, a precise prediction of field strength based on various propagation environments should be set up to design of radio stations with reliable transmit power and service coverage. Therefore, many countries have tried to secure the propagation models suitable for their each geographical environments, and also, some models like BCAST were developed by Korea, but these models give the different results compared to measured values. In this paper, based on the measurements of DTV broadcasting services in domestic rural area, analysis and comparison of ITU-R P.1546 and BCAST models provide errors between measured and predicted values, and some points for improving SMI system has been proposed. As a result, P.1546 model provides the valid predicted data similar to measured data, but BCAST model has some problems of large deviation and higher prediction to measured data. In future, these problems and fading loss due to a forest or group of trees, and reflection loss due to a lake or sea need to be studied carefully.

유한한 주파수 자원을 효율적으로 이용하기 위해서는 무선국 설계시 지역별 전파환경에 기반한 전파전달 특성을 정확히 예측하여 무선국의 송신출력 및 서비스 커버리지 등을 설계하는 것이 필요하다. 따라서 세계 각국에서는 자국의 환경에 맞는 전파모델을 확보하려고 노력하고 있으며, 국내에서도 BCAST와 같은 모델이 개발되어 전파분석에 이용되어 왔지만, 아직도 측정결과와 상이한 결과를 제공하고 있다. 이에 본 연구에서는 국내 Rural 지역의 DTV 방송서비스에 대해 측정한 후, 측정된 데이터와 SMIS 예측모델 P.1546 및 BCAST에 대한 실측/예측 비교분석 및 이의 오차 분석을 수행하여 SMIS 향후 개선방안을 제시한다. ITU-R 권고안 P.1546 및 BCAST 모델적용에 있어 실측/예측 오차, 특히 BCAST 모델인 경우 측정치 보다 높게 예측되는 문제점 등이 도출되어, 향후 숲과 나무에 의한 페이딩, 호수 및 바다에 의한 전파반사 등에 대한 정밀한 분석이 필요하다.

Keywords

References

  1. K. Para and N. Noori, "Tuning of the propagation model ITU-R P.1546 Recommendation," Progress in Electromagnetics Research B, Vol.8, pp.243-255, 2008. https://doi.org/10.2528/PIERB08062201
  2. Y. H. Kang, "Study on the Spectrum Sharing based on Analysis of Channel Interference between LTE/LTE-Advanced Systems," JKONI, Vol.16, No.2, pp219-226, April, 2012.
  3. Rappaport, Wireless Communications Principles & Practice, Prentice Hall, 2002.
  4. Notification of MSIP, The Frame Point and the Expression Method for the Requirement of Field Strength in Broadcasting Area, Vol.2013-155, 2013
  5. RRA Report, A Study on the Illustration of Analysis Algorithm for Broadcasting Network, 2008.
  6. ITU-R Recommendation P.370-7, "VHF and UHF propagation curves for the frequency range from 30MHz to 1000MHz," Oct. 1999.
  7. ITU-R recommendation P.529-3, "Prediction methods for the terrestrial land mobile services in the VHF and UHF bands," Oct. 1995.
  8. ITU-R Recommendation P.1146, "The prediction of field strength for land mobile and terrestrial broadcasting services in the frequency range from 1 to 3GHz," Oct. 1999.
  9. ITU-R Recommendation P.1546-4, "Method for point-to-area predictions for terrestrial services in the frequency range 30MHz to 3000MHz," Oct. 2009.
  10. E. Ostlin, H. Suzuki, H.-J. Zepernik, "Comparison and evaluation of ITU-R Recommendation P.1546 versions", IEEE Semiannual Vehicular Technology Conference, vol. 6, Melbourne, Victoria, pp.2896-2900, 2006
  11. RRA Report, A Study on the Frequency Resources Analysis Algorithm for Broadcasting Network, 2007.
  12. Y.H. Kang, Y.K. Kwon, H.S. Kim, "Comparison of propagation models based on DTV field strength measurement in urban environment", JKONI, Vol.17, No.5, pp.484-490, Oct., 2013. https://doi.org/10.12673/jkoni.2013.17.5.484