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| Content Provider | IET Digital Library |
|---|---|
| Author | Sultan, Kiran Zafar, Bassam |
| Abstract | In underlay cognitive radio networks (CRNs), secondary users (SUs) are allowed to co-exist with the primary users at the cost of reduced transmit power in order to satisfy the stringent interference constraint. This obligation reduces the coverage area of the SUs and they have to involve relaying services for assistance. However, selecting the best combination of relays from the available options is more challenging in an energy-constrained environment, since it is affected not only by the interference constraint, but also the selected subset of relays must guarantee some quality-of-service (QoS) at the secondary destination also. This study is focused on an amplify-and-forward-based relay-assisted CRN operating in an underlay scenario and studies three relay subset selection or multiple relay selection schemes taking into consideration outgoing secondary and primary link qualities of each candidate relay. For each scheme, the closed-form expression for probability density function of signal-to-noise ratio at the secondary destination is derived followed by detailed analysis of two QoS metrics, i.e. outage probability and bit error rate. Finally, simulations have been performed to validate the analytical results. |
| Starting Page | 2609 |
| Ending Page | 2615 |
| Page Count | 7 |
| ISSN | 17518628 |
| Volume Number | 12 |
| e-ISSN | 17518636 |
| Issue Number | Issue 20, Dec (2018) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/12/20 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.5587 |
| Journal | IET Communications |
| Publisher Date | 2018-09-18 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Amplify And Forward Communication Amplify-and-forward-based Relay-assisted CRN Bit Error Rate Candidate Relay Closed-form Expression Cognitive Radio Coverage Area Energy-constrained Environment Error Statistics Multiple Relay Selection Scheme Performance Analysis Primary Link Qualities Primary User Probability Probability Density Function QoS Metrics Quality of Service Radio Frequency Interference Radio Link And Equipment Reduced Transmit Power Cost Relay Network Relay Subset Selection Scheme Relay-assisted CRN Relaying Services Secondary Destination Secondary User Signal to Noise Ratio Statistics Stringent Interference Constraint SUs Telecommunication Underlay Cognitive Radio Network Underlay Relay-assisted CRNs |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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