The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Study of Radio Wave Propagation Criterion for the Cognitive Radio System using Interference Analysis in Broadcasting Band

방송대역에서 간섭분석을 이용한 무선인지 시스템의 전파 전달기준에 관한 연구

  • 최주평 (숭실대학교 정보통신공학과 통신신호처리 연구실) ;
  • 보꾹유이 (숭실대학교 정보통신공학과 통신신호처리 연구실) ;
  • 이원철 (숭실대학교 정보통신공학과 통신신호처리 연구실)
  • Published : 2009.12.31
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Abstract

In this paper, interference analysis is carried out to obtain the operating criterion and coexistence condition between digital television devices and cognitive radio-based mobile wimax devices in the UHF (Ultra High Frequency) broadcasting frequency bands. To this end, an efficient interfering calculation tool known as SEAMCAT (Spectrum Engineering Advanced Monte-Carlo Analysis Tool) is employed to acquire the coexistence criterions between heterogeneous radio links operating in the same portion of spectrum. As a result, these criterions will be used to achieve interference temperature limit level applied to interference temperature model for analyzing the capacity of cognitive radio receivers accurately.

본 논문에서는 UHF(Ultra High Frequency) 방송 대역에서 면허 사용자인 DTV(Digital Television) 서비스와 무선인지(cognitive radio, CR) 기술 기반의 모바일 와이맥스(mobile wimax) 서비스 사용자 상호 간 최적 공존 및 운용 방안 획득을 위하여 간섭분석을 수행하였다. 이를 위해 SEAMCAT(Spectrum Engineering Advanced Monte-Carlo Analysis Tool) 간섭분석 프로그램을 이용하여 방송대역에 존재하는 상기 무선통신 상호 간 최적 공존 기준 획득을 위한 모의실험을 수행하였다. 또한 간섭분석을 통하여 획득된 주변 통신환경 정보는 수신기 관점에서의 정확한 간섭 기준 취득 방안인 간섭온도 모델에 적용하였다. 이를 통해 DTV와 CR 사용자의 중심 주파수 차이에 따른 CR 사용자 수신기에서의 획득 가능 통신용량 변화를 분석하였다.

Keywords

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