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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2009.2
- 수록면
- 124 - 131 (8page)
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초록· 키워드
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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 first 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.
목차
ABSTRACT
Ⅰ. Introduction
Ⅱ. System Model
Ⅲ. Distributed Cooperative Spectrum Sensing
Ⅳ. Cooperative Spectrum Sensing among Multiple Users
Ⅴ. Simulation Results
Ⅵ. Conclusions
References
참고문헌 (10)
참고문헌 신청
1. [학술대회논문] - D.Cabric / 2004 / Implementation Issues in Spectrum Sensing for Cognitive Radios / Asilomar Conference on Signals, Systems, and Computers
2. [보고서] - FCC / 2002 / Spectrum Policy Task Force Report
3. [보고서] - FCC / 2003 / Notice of Proposed Rule Making and Order
4. [학술대회논문] - A. Sahia / 2004 / Some Fundamental Limits on Cognitive Radio / Proc. Allerton Conf. on Commun., Control and Computing
5. [학술대회논문] - A. Ghasemi / 2005 / Collaborative Spectrum Sensing for Opportunistic Access in Fading Environment / Proc. 1st IEEE Symp. New Frontiers in Dynamic Spectrum Access Networks
2. [보고서] - FCC / 2002 / Spectrum Policy Task Force Report
3. [보고서] - FCC / 2003 / Notice of Proposed Rule Making and Order
4. [학술대회논문] - A. Sahia / 2004 / Some Fundamental Limits on Cognitive Radio / Proc. Allerton Conf. on Commun., Control and Computing
5. [학술대회논문] - A. Ghasemi / 2005 / Collaborative Spectrum Sensing for Opportunistic Access in Fading Environment / Proc. 1st IEEE Symp. New Frontiers in Dynamic Spectrum Access Networks
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