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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2009.2
- 수록면
- 107 - 112 (6page)
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초록· 키워드
오류제보하기
Spectral efficiency of current two-phase cooperative communications protocols is low since in the second time the relay forwards the same siganl received from the source to the destination, the source keeps silent in this time. In this paper, we propose a novel cooperative communications protocol where the signal needed to transmit to the destination is sent in both phases, the source and the relay also transmit different signal to the destination thus no loss of spectral efficiency. This protocol performs signal selection based on log-likelihood ratio (LLR) at relay and maximum likelihood (ML) detection at destination. While existing protocols pay for a worse performance than direct transmission in the low SNR regime which is of special interest in ad hoc networks, ours is better over the whole range of SNR. In addition, the proposal takes advantages of bandwidth efficiency, long delay and interference among many terminals in ad hoc network. Simulation results show that the proposed protocol can significantly save total energy for wireless ad hoc networks.
목차
ABSTRACT
Ⅰ. Introduction
Ⅱ. System model
Ⅲ. Numerical results and discussion
Ⅳ. Conclusion
References
참고문헌 (12)
참고문헌 신청
1. [단행본] - J.G. Proakis / 2001 / Digital communications, 4th Edition / McGraw-Hill
2. [학술지(정기간행물)] - J.N. Laneman / 2004 / Cooperative diversity in wireless networks: Efficient protocols and outage behavior / IEEE Trans. Inform. Theory 50 : 3062 ~ 3080
3. [학술대회논문] - H. Hu / 2004 / Range extension without capacity penalty in cellular networks with digital fixed relays / IEEE Globecom : 3053 ~ 3057
4. [학술지(정기간행물)] - A. Nosratinia / 2004 / Cooperative Communication in Wireless Networks / IEEE Commun. Mag. 42 : 74 ~ 80
5. [학술대회논문] - 03W. Su / 2005 / SER performance analysis and optimum power allocation for decode-andforward cooperation protocol in wireless networks / IEEE WCNC : 984 ~ 989
2. [학술지(정기간행물)] - J.N. Laneman / 2004 / Cooperative diversity in wireless networks: Efficient protocols and outage behavior / IEEE Trans. Inform. Theory 50 : 3062 ~ 3080
3. [학술대회논문] - H. Hu / 2004 / Range extension without capacity penalty in cellular networks with digital fixed relays / IEEE Globecom : 3053 ~ 3057
4. [학술지(정기간행물)] - A. Nosratinia / 2004 / Cooperative Communication in Wireless Networks / IEEE Commun. Mag. 42 : 74 ~ 80
5. [학술대회논문] - 03W. Su / 2005 / SER performance analysis and optimum power allocation for decode-andforward cooperation protocol in wireless networks / IEEE WCNC : 984 ~ 989
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