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On the performance of cognitive underlay multihop networks with imperfect channel state information
Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
2013 (engelsk)Inngår i: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 61, nr 12, s. 4864-4873Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper proposes and analyzes cognitive multihop decode-and-forward networks in the presence of interference due to channel estimation errors. To reduce interference on the primary network, a simple yet effective back-off control power method is applied for secondary multihop networks. For a given threshold of interference probability at the primary network, we derive the maximum back-off control power coefficient, which provides the best performance for secondary multihop networks. Moreover, it is shown that the number of hops for secondary network is upper-bounded under the fixed settings of the primary network. For secondary multihop networks, new exact and asymptotic expressions for outage probability (OP), bit error rate (BER) and ergodic capacity over Rayleigh fading channels are derived. Based on the asymptotic OP and BEP, a pivotal conclusion is reached that the secondary multihop network offers the same diversity order as compared with the network without back off. Finally, we verify the performance analysis through various numerical examples which confirm the correctness of our analysis for many channel and system settings and provide new insight into the design and optimization of cognitive multihop networks.

sted, utgiver, år, opplag, sider
IEEE , 2013. Vol. 61, nr 12, s. 4864-4873
Emneord [en]
Bit error rate, Decode-and-forward, Dual-hop cognitive relay network, Ergodic capacity, Imperfect channel state information, Multihop, Outage probability, Rayleigh fading, Spectrum sharing
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Identifikatorer
URN: urn:nbn:se:bth-6367DOI: 10.1109/TCOMM.2013.110413.130167ISI: 000330225000007Lokal ID: oai:bth.se:forskinfoF228514A2A4E4F91C1257CBA002CE833OAI: oai:DiVA.org:bth-6367DiVA, id: diva2:833865
Tilgjengelig fra: 2015-05-25 Laget: 2014-04-14 Sist oppdatert: 2018-01-11bibliografisk kontrollert

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