NDLI: Performance analysis and optimal relay position of cognitive spectrum-sharing dual-hop decode-and-forward networks

Content Provider	IEEE Xplore Digital Library
Author	Thien-Thanh Tran Vo Nguyen Quoc Bao Vu Dinh Thanh Duong, T.Q.
Copyright Year	2013
Description	Author affiliation: Telecommun. Dept., Posts & Telecommun. Inst. of Technol., Hanoi, Vietnam (Vo Nguyen Quoc Bao) \|\| Fac. of Electr. & Electron. Eng., Ho Chi Minh City Univ. of Technol. - VNUHCM, Ho Chi Minh City, Vietnam (Thien-Thanh Tran; Vu Dinh Thanh) \|\| Blekinge Inst. of Technol., Karlskrona, Sweden (Duong, T.Q.)
Abstract	The performance of cognitive networks (CNs) has been significantly improved by deploying a third-party, namely relay, to assist the direct communication. However, under a limited transmit power governed by the maximum tolerable interference at the primary network, the cognitive relay network still suffers a performance loss compared to its non-cognitive counterpart. To alleviate this shortcoming, this paper has pro-posed a technique to optimally deploy the relay in CNs. In particular, by assuming the decode-and-forward (DF) relay, we first derive an exact expression for the outage probability (OP) of CNs with spectrum-sharing environment over Nakagami-m channels. Then, using the exact formula, we obtain the asymptotic OP expression which further reveals the impact of networks' parameters on the performance. In addition, the optimal relay placement, i.e., minimizing the system OP, is also investigated by utilizing the asymptotic OP result. We have shown through some representative scenarios that given a fixed coordinate of a primary receiver, the optimal relay deployment significantly outperforms the two conventional approaches, i.e., uniform and random topologies.
Sponsorship	IEEE Vietnam Sect.
Starting Page	269
Ending Page	273
File Size	316628
Page Count	5
File Format	PDF
ISBN	9781467320870
e-ISBN	9781467320887
DOI	10.1109/ComManTel.2013.6482403
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-21
Publisher Place	Vietnam
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Spectrum-sharing Cognitive relay networks Interference Receivers Nakagami-m Approximation methods Relays Optimal relay placement Spread spectrum communication Cognitive networks Decode-and-forward Signal to noise ratio
Content Type	Text
Resource Type	Article

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