Publications:Hard decision packet combining methods for industrial wireless relay networks

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Title Hard decision packet combining methods for industrial wireless relay networks
Author Elisabeth Uhlemann and Andreas Willig
Year 2008
PublicationType Conference Paper
Journal
HostPublication Second International Conference on Communications and Electronics, 2008. ICCE 2008
DOI http://dx.doi.org/10.1109/CCE.2008.4578941
Conference Second International Conference on Communications and Electronics, Hoi An City, Vietnam from, 4-6 June, 2008
Diva url http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239131
Abstract We consider wireless relay networks for use in industrial applications with strict requirements on both reliable and timely communications. In most cases commercially available transceivers must be used, which implies that only hard decision detector outputs are available. Since relay networks typically use retransmissions of erroneous packets, packet combining methods have the potential to increase the information reliability without excessive delay. We evaluate three different hard decision packet combining methods for different placement of the source, the relay node and the destination. Packet combining can in general be improved with knowledge of the current channel state information, which, however, is often not available. In this paper we find a packet combining method which does not use channel state information but which delivers similar performance as the scheme that has knowledge of the channel state.