Cognitive Relay Networks With Multiple Primary Transceivers Under Spectrum-Sharing
| Document type: | Journal Articles |
|---|---|
| Article type: | Original article |
| Peer reviewed: | Yes |
| Author(s): | Quang Trung Duong, Phee Lep Yeoh, Nguyen Quoc Bao Vo, Maged Elkashlan, Nan Yang |
| Title: | Cognitive Relay Networks With Multiple Primary Transceivers Under Spectrum-Sharing |
| Journal: | IEEE Signal Processing Letters |
| Year: | 2012 |
| Volume: | 19 |
| Issue: | 11 |
| Pagination: | 741-744 |
| ISSN: | 1070-9908 |
| Publisher: | IEEE |
| URI/DOI: | 10.1109/LSP.2012.2217327 |
| ISI number: | 000308963900008 |
| Organization: | Blekinge Institute of Technology |
| Department: | School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling) School of Engineering S- 372 25 Ronneby +46 455 38 50 00 http://www.tek.bth.se/ |
| Language: | English |
| Abstract: | 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. |
| Subject: | Signal Processing\General |
| Keywords: | Cognitive radio, DF relays, spectrum-sharing |
