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Orthogonal Signaling-based Sensing Data Reporting for Cooperative Spectrum Sensing in Cognitive Radio
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  • Orthogonal Signaling-based Sensing Data Reporting for Cooperative Spectrum Sensing in Cognitive Radio
  • Orthogonal Signaling-based Sensing Data Reporting for Cooperative Spectrum Sensing in Cognitive Radio
저자명
Ko. Jae-Hoon,Kwon. Soon-Mok,Kim. Chee-Ha
간행물명
한국통신학회논문지. The journal of Korea Information and Communications Society. 무선통신
권/호정보
2011년|36권 |pp.287-295 (9 pages)
발행정보
한국통신학회
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정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Cognitive radio (CR) features opportunistic access to spectrum when licensed users (LU) are not operating. To avoid interference to LU, cognitive users (CU) need to perform spectrum sensing. Because of local shadowing, fading, or limited sensing capability, it is suggested that multiple CUs cooperate to detect LU. In cooperative spectrum sensing, CUs should exchange their sensing data with minimum bandwidth and delay. In this paper, we introduce a novel method to efficiently report sensing data to the central node in an infrastructured OFDM-based CR network. All CUs simultaneously report their sensing data over unique and orthogonal signals on locally available subcarriers. By detecting the signals, the central node can determine subcarrier availability for each CU. Implementation challenges are identified and then their solutions are suggested. The proposed method is evaluated through simulation on a realistic channel model. The results show that the proposed method is feasible and efficient.