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Opportunistic Relay Selection in Cooperative Systems With Dirty-Paper Coding
- Source :
- IEEE Transactions on Vehicular Technology, IEEE Trans.Veh.Technol.
- Publication Year :
- 2009
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2009.
-
Abstract
- This paper investigates an optimization of the conventional relay selection for multirelay environments. In contrast with previously reported selection schemes, where a selected relay accesses the channel in a dedicated cooperative slot, the proposed scheme recovers the bandwidth loss of the half-duplex constraint by allowing two relays to simultaneously access the channels. Based on an appropriate dirty-paper coding (DPC) technique among relays, the proposed scheme enables a relay to establish communication with the destination at the same time that another relay forwards the data from the source. It is proven that the interplay between relay selection and the superposition DPC weight factor provides a tradeoff between relaying and new data performance. Hence, an appropriate codesign of the superposition DPC parameter and opportunistic relay selection can achieve efficient communication for the new data without affecting the relaying performance. The proposed scheme is compared with conventional relaying approaches, and its enhancements are provided through theoretical studies and numerical results.
- Subjects :
- Engineering
Computer Networks and Communications
business.industry
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Aerospace Engineering
Data_CODINGANDINFORMATIONTHEORY
Cooperative diversity
law.invention
Relay
law
Automotive Engineering
Computer Science::Networking and Internet Architecture
Electronic engineering
Wireless
Dirty paper coding
Fading
Electrical and Electronic Engineering
business
Relay channel
Decoding methods
Computer Science::Information Theory
Communication channel
Subjects
Details
- ISSN :
- 19399359 and 00189545
- Volume :
- 58
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Vehicular Technology
- Accession number :
- edsair.doi.dedup.....80fab48343ebf7aea2083630ffadde02