Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/5343
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Teodoro, Sara | pt |
dc.contributor.author | Silva, Adão | pt |
dc.contributor.author | Gil, João M. | pt |
dc.contributor.author | Gameiro, Atílio | pt |
dc.date.accessioned | 2012-01-24T16:03:05Z | - |
dc.date.available | 2012-01-24T16:03:05Z | - |
dc.date.issued | 2010 | - |
dc.identifier.issn | 1687-1499 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/5343 | - |
dc.description.abstract | Cooperative schemes are promising solutions for cellular wireless systems to improve system fairness, extend coverage and increase capacity. The use of relays is of significant interest to allow radio access in situations where a direct path is not available or has poor quality. A data precoded relay-assisted scheme is proposed for a system cooperating with 2 relays, each equipped with either a single antenna or 2-antenna array. However, because of the half-duplex constraint at the relays, relaying-assisted transmission would require the use of a higher order constellation than in the case when a continuous link is available from the BS to the UT. This would imply a penalty in the power efficiency. The simple precoding scheme proposed exploits the relation between QPSK and 16-QAM, by alternately transmitting through the 2 relays, achieving full diversity, while significantly reducing power penalty. Analysis of the pairwise error probability of the proposed algorithm with a single antenna in each relay is derived and confirmed with numerical results. We show the performance improvements of the precoded scheme, relatively to equivalent distributed SFBC scheme employing 16-QAM, for several channel quality scenarios. Copyright © 2010 Sara Teodoro, et al. | pt |
dc.description.sponsorship | European project CODIV | pt |
dc.description.sponsorship | Portuguese project CADWIN | pt |
dc.description.sponsorship | Portuguese project AGILE | pt |
dc.description.sponsorship | FCT | pt |
dc.language.iso | eng | pt |
dc.publisher | SpringerOpen | pt |
dc.relation.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-79952134560&partnerID=40&md5=b7d9c39738cb70df8f31fe67ad8e4971 | - |
dc.rights | openAccess | por |
dc.subject | Cellular system | pt |
dc.subject | Cellular wireless systems | pt |
dc.subject | Channel quality | pt |
dc.subject | Cooperative schemes | pt |
dc.subject | Direct paths | pt |
dc.subject | Full diversity | pt |
dc.subject | Half-duplex | pt |
dc.subject | Higher order | pt |
dc.subject | Numerical results | pt |
dc.subject | Pair-wise error probability | pt |
dc.subject | Performance improvements | pt |
dc.subject | Power efficiency | pt |
dc.subject | Precoding scheme | pt |
dc.subject | Radio access | pt |
dc.subject | Reducing power | pt |
dc.subject | Single antenna | pt |
dc.subject | System fairness | pt |
dc.subject | Antenna arrays | pt |
dc.subject | Probability | pt |
dc.subject | Algorithms | pt |
dc.title | Novel precoded relay-assisted algorithm for cellular systems | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.title | EURASIP Journal on Wireless Communications and Networking | pt |
degois.publication.volume | 2010 | pt |
dc.identifier.doi | 10.1155/2010/414657 | * |
Appears in Collections: | DETI - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Nove_ERASIP_WCN.pdf | 1.52 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.