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Cooperative Multi-relay Scheme for Secondary Spectrum Access
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  • Cooperative Multi-relay Scheme for Secondary Spectrum Access
  • Cooperative Multi-relay Scheme for Secondary Spectrum Access
저자명
Duy. Tran-Trung,Kong. Hyung-Yun
간행물명
KSII Transactions on internet and information systems : TIIS
권/호정보
2010년|4권 3호|pp.273-288 (16 pages)
발행정보
한국인터넷정보학회
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

In this paper, we propose a cooperative multi-relay scheme for a secondary system to achieve spectrum access along with a primary system. In the primary network, a primary transmitter (PT) transmits the primary signal to a primary receiver (PR). In the secondary network, N secondary transmitter-receiver pairs (ST-SR) selected by a centralized control unit (CCU) are ready to assist the primary network. In particular, in the first time slot, PT broadcasts the primary signal to PR, which is also received by STs and SRs. At STs, the primary signal is regenerated and linearly combined with the secondary signal by assigning fractions of the available power to the primary and secondary signals respectively. The combined signal is then broadcasted by STs in a predetermined order. In order to achieve diversity gain, STs, SRs and PT will combine received replicas of the primary signal, using selection combining technique (SC). We derive the exact outage probability for the primary network as well as the secondary network. The simulation results are presented to verify the theoretical analyses.