A Multi-Phase Decode-and-Forward Transmission Protocol in Cognitive Relay Networks: Outage Analysis and Relay Power Allocation
- Resource Type
- Conference
- Authors
- Lin, Wenxuan; Wang, Ying; Li, Frank Y.
- Source
- 2015 IEEE 81st Vehicular Technology Conference (VTC Spring) Vehicular Technology Conference (VTC Spring), 2015 IEEE 81st. :1-5 May, 2015
- Subject
- Aerospace
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Fields, Waves and Electromagnetics
Power, Energy and Industry Applications
Signal Processing and Analysis
Transportation
Protocols
Resource management
Interference
Relay networks (telecommunications)
Fading
Receivers
- Language
- ISSN
- 1550-2252
Consider an underlay cognitive relay network with multiple source and destination pairs and that a decode-and-forward scheme is adopted at the relay. We propose a multi-phase transmission protocol in this paper which involves cooperation among source, relay and destination nodes. Given perfect interference elimination before decoding at the destination nodes, we derive closed-form expressions for outage probability calculation over Rayleigh fading channels. Furthermore, the optimal relay power allocation factor which leads to minimal outage probability is determined. Numerical results reveal the conditions under which satisfactory performance can be achieved based on the proposed scheme.