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- Title
Filter-and-forward transceiver design for cognitive two-way relay networks.
- Authors
Maleki, Marjan; Vakili, Vahid Tabataba
- Abstract
In this study a new approach tofilter-and-forward (FF) relay design in an overlay cognitive radio (CR) network with frequency selective channels is proposed. In this system, to implement two-way relaying scheme, a secondary multi-antenna node acts as a relay and helps two primary users (PUs) communicate with each other and in return the secondary node superposes its signal tofiltered signals of PUs. The authors intend to design secondary transceiver under two criteria, one from the viewpoint of improving the performance of secondary network and the other to guarantee quality of service (QoS) of primary network. The first criterion is to maximise the signal-to-interference-plusnoise ratio (SINR) of secondary receiver subject to constraints on QoS of PUs and the relay transmitted power. For the other one, the goal is to achieve max-min fairness among PUs through maximising the worse signal-to-interferenceplus- noise ratio (SINR) of PUs subject to constraints on QoS of secondary receiver and transmit power of relay. The authors employ an alternating optimisation algorithm to find the beamforming matrices and the allocated power to secondary receiver's message in these non-convex problems. Simulation results show that the proposed FF approach has better performance compared with simple AF relaying strategy.
- Subjects
COGNITIVE radio; QUALITY of service; SIGNAL-to-noise ratio; INTERFERENCE (Telecommunication); RADIO transmitter-receivers; RADIO relay systems
- Publication
IET Communications (Wiley-Blackwell), 2015, Vol 9, Issue 17, p2061
- ISSN
1751-8628
- Publication type
Article
- DOI
10.1049/iet-com.2015.0043