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 Cyclostationarity-Based Spectrum Sensing Scheme for Cognitive Radio Systems in High Traffic Circumstances

통화량이 많은 상황에서 인지 무선 시스템을 위한 Cyclostationarity 기반 스펙트럼 센싱 기법

  • Received : 2012.10.09
  • Accepted : 2012.11.12
  • Published : 2012.11.30
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Abstract

In cognitive radio (CR) systems, the secondary user (SU) performs the spectrum sensing to determine the presence of the primary user (PU) on the PU's frequency band. In practical cases, the PU would arrive and depart randomly in the sensing duration of the SU, which is referred to as the high traffic circumstance. In this paper, we propose a cyclostationarity-based spectrum sensing scheme for CR systems in high traffic circumstances. From numerical results, it is confirmed that the proposed scheme outperforms both the energy detector proposed for high traffic circumstances and the conventional cyclostationarity-based spectrum sensing scheme.

인지무선 통신 시스템에서는 2차 사용자가 1차 사용자의 주파수 대역 점유 여부를 판단하는 스펙트럼 센싱을 수행한다. 실제 인지무선 통신 시스템에서는 센싱 구간 동안 1차 사용자 신호가 임의로 중간에 들어오거나 나가는 통화량이 많은 상황이 발생한다. 본 논문에서는 이러한 통화량이 많은 상황에 알맞은 cyclostationarity 기반 스펙트럼 센싱 기법을 제안한다. 또한, 모의실험을 통해 제안한 cyclostationarity 기반 검출 기법이 기존의 통화량이 많은 상황을 위한 에너지 검파 기법 및 통화량이 많은 상황을 고려하지 않은 cyclostationarity 기반 검출 기법보다 우수한 센싱 성능을 가짐을 보인다.

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References

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