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Cognitive Relay Networks With Multiple Primary Transceivers Under Spectrum-Sharing
Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
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2012 (English)In: IEEE Signal Processing Letters, ISSN 1070-9908, E-ISSN 1558-2361, Vol. 19, no 11, 741-744 p.Article in journal (Refereed) Published
Abstract [en]

We examine the impact of multiple primary transmitters and receivers (PU-TxRx) on the outage performance of cognitive decode-and-forward relay networks. In such a joint relaying/spectrum-sharing arrangement, we address fundamental questions concerning three key power constraints: 1) maximum transmit power at the secondary transmitter (SU-Tx), 2) peak interference power at the primary receivers (PU-Rx), and 3) interference power at SU-Rx caused by the primary transmitter (PU-Tx). Our answers to these are given in new analytical expressions for the exact and asymptotic outage probability of the secondary relay network. Based on our asymptotic expressions, important design insights into the impact of primary transceivers on the performance of cognitive relay networks is reached. We have shown that zero diversity order is attained when the peak interference power at the PU-Rx is independent of the maximum transmit power at the SU-TX.

Place, publisher, year, edition, pages
IEEE , 2012. Vol. 19, no 11, 741-744 p.
Keyword [en]
Cognitive radio, DF relays, spectrum-sharing
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-7164DOI: 10.1109/LSP.2012.2217327ISI: 000308963900008Local ID: oai:bth.se:forskinfoC51FBF2908DDE86BC1257AC3005319C7OAI: oai:DiVA.org:bth-7164DiVA: diva2:834746
Available from: 2012-11-27 Created: 2012-11-27 Last updated: 2016-09-08Bibliographically approved

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