The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Effects of Adjacent Channel Leakage on an Energy Detection Based Spectrum Sensing

인접 채널 누설이 에너지 검파 기반 스펙트럼 센싱에 미치는 영향

  • Lim, Chang Heon (Department of Electronic Engineering, Pukyong National University) ;
  • Kim, Hyung Jung (Radio Analysis Research Section, Electronics and Telecommunication Research Institute) ;
  • Kim, Chang Joo (Radio Analysis Research Section, Electronics and Telecommunication Research Institute)
  • 임창헌 (부경대학교 전자공학과) ;
  • 김형중 (한국전자통신연구원 신호처리분석연구실) ;
  • 김창주 (한국전자통신연구원 신호처리분석연구실)
  • Received : 2014.02.04
  • Accepted : 2014.03.31
  • Published : 2014.05.31
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Abstract

When a primary user transmits over some frequency band assigned to it, most of its transmission power tends to be concentrated in the band but a small portion of it spreads into the adjacent bands. Thus the false alarm probability for the adjacent bands can be higher than expected, even though no primary users are active in the bands. A previous work evaluated the effects of the adjacent channel leakage on the performance of an energy detection based spectrum sensing but it did not take into account the fading phenomenon. In this paper, we analyze the effects of the adjacent channel leakage on an energy detection based spectrum sensing scheme in terms of detection probability and false alarm probability in a fading environment.

1차 사용자(primary user)는 자신에게 할당된 대역을 사용하여 통신을 수행하는데, 이때 송신 신호의 전력은 대부분 해당 대역에 집중되어 있지만, 일부는 인접 대역으로 넘어간다. 이 때문에 인접 대역이 비어 있더라도 오경보율이 예상보다 크게 발생할 수가 있다. 이전 연구 중에 인접 대역 누설 현상이 스펙트럼 센싱에 미치는 영향을 분석한 것이 있지만, 이때 페이딩을 고려하지 않았다. 본 논문에서는 페이딩 채널 환경에서 인접 대역 누설이 에너지 기반 스펙트럼 센싱 성능에 미치는 영향을 검파 확률과 오경보 확률 측면에서 분석하고자 한다.

Keywords

References

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