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서지반출
Performance of DF Protocol for Distributed Cooperative Spectrum Sensing in Cognitive Radio
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  • Performance of DF Protocol for Distributed Cooperative Spectrum Sensing in Cognitive Radio
  • Performance of DF Protocol for Distributed Cooperative Spectrum Sensing in Cognitive Radio
저자명
추명예,배상준,곽경섭,Zou. Mingrui,Bae. Sang-Jun,Kwak. Kyung-Sup
간행물명
한국통신학회논문지. The journal of Korea Information and Communications Society. 무선통신
권/호정보
2009년|34권 |pp.124-131 (8 pages)
발행정보
한국통신학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Cognitive radio has been proposed to mitigate the spectrum scarcity problem by allowing the secondary users to access the under-utilized frequency bands and opportunistically transmit. Spectrum sensing, as a key technology in cognitive radio, is required to reliably detect the presence of primary users to avoid the harmful interference. However, it would be very hard to reliably detect the presence of primary users due to the channel fading, shadowing. In this paper, we proposed a distributed cooperative spectrum sensing scheme based on conventional DF (decode-and-forward) cooperative diversity protocol. We fist consider the cooperation between two secondary users to illustrate that cooperation among secondary users can obviously increase the detection performance. We then compare the performance of DF based scheme with another conventional AF (amplify-and-forward) protocol based scheme. And it is found that the proposed scheme based on DF has a better detection performance than the one based on AF. After that, we extend the number of cooperative secondary users, and demonstrate that increasing the cooperation number can significantly improve the detection performance.