Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Cooperative Spectrum Sensing for Cognitive Radio Systems with Energy Harvesting Capability

에너지 수집 기능이 있는 인지 무선 시스템의 협력 스펙트럼 센싱 기법

  • Received : 2011.11.28
  • Accepted : 2012.03.19
  • Published : 2012.03.25
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Abstract

In this paper, we investigate cooperative spectrum sensing scheme for sensor network-aided cognitive radio systems with energy harvesting capability. In the proposed model, each sensor node harvests ambient energy from environment such as solar, wind, mechanical vibration, or thermoelectric effect. We propose adaptive cooperative spectrum sensing scheme in which each sensor node adaptively carries out energy detection depending on the residual energy in its energy storage and then conveys the sensing result to the fusion center. From simulation results, we show that the proposed scheme minimizes the false alarm probability for given target detection probability by adjusting the number of samples for energy detector.

본 논문에서는 에너지 수집(energy harvesting) 기능이 있는 무선 센서 노드(sensor node)들이 인지 무선 시스템의 스펙트럼 센싱 신뢰성 및 정확도를 높이기 위하여 협력 스펙트럼 센싱을 수행하는 무선 센서 네트워크를 제안한다. 각 센서 노드들이 태양광, 풍력 등으로부터 에너지를 자체적으로 수집하여 전원으로 이용할 때, 수집되는 에너지의 양에 따라 적응적으로 스펙트럼 센싱을 수행하고, 그 결과를 융합 센터(fusion center)로 전송하는 적응적 스펙트럼 센싱 기법을 제안한다. 모의실험을 통해 무선 센서 네트워크를 구성하는 센서 노드의 수와 수집되는 에너지의 통계적인 특성에 따라 스펙트럼 센싱의 성능이 어떻게 달라지는지 보이고, 센서 노드의 에너지 검출기에 사용되는 표본의 개수를 조절함으로써 융합 센터에서 오검출 확률을 최소화할 수 있음을 보여준다.

Keywords

References

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