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Coverage Costs with an Amplify-and-Forward Relaying Scheme
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS. (Radio Communication Systems)
2006 (English)Conference paper (Refereed)
Abstract [en]

The use of relaying technologies has previously beenproposed as lower cost alternatives to the traditional cellularsystems for providing wireless broadband access. In particular,parallel relaying uses combining diversity to improve the spectralefficiency on radio connections. This paper1 compares the infrastructurecosts of providing downlink coverage with and withoutrelays. The relays in the hybrid system are fixed, randomlydeployed, and are using a SIMO amplify-and-forward relayingscheme. The cost savings of using the relaying scheme are basedon empirical figures for the cost per unit/site. Numerical resultsshow that the use of relays improves the coverage, especially atlow SNR values, even with random relay deployment. Howeverthe coverage and cost savings are strongly dependent on thecharacteristics of the propagation environment and on the typesof units used. For instance, if the shadow fading from both therelays and the bases is uncorrelated, cost savings are obtainedonly if a base is at least 10 times more expensive than a relay.

Place, publisher, year, edition, pages
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Computer and Information Science
Research subject
URN: urn:nbn:se:kth:diva-29807OAI: diva2:398158
13th International Conference on Telecommunications ICT 2006
QC 20110217Available from: 2011-02-16 Created: 2011-02-16 Last updated: 2011-02-17Bibliographically approved

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Timus, Bogdan
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