%0 Conference Paper %A Eltayeb, Nasr E.M. %A Kassim, Shakiru K. %A Chambers, Jonathon %D 2009 %T Adaptive resource allocation within three-stage OFDM relay networks %U https://repository.lboro.ac.uk/articles/conference_contribution/Adaptive_resource_allocation_within_three-stage_OFDM_relay_networks/9549206 %2 https://repository.lboro.ac.uk/ndownloader/files/17180231 %K untagged %K Mechanical Engineering not elsewhere classified %X In this work we consider OFDM transmission, due to its potential for meeting the stringent quality of service (QoS) targets of next-generation broadband distributed wireless networks, over three-stage relay networks. In particular, we examine distributed adaptive space-frequency coding for generally asynchronous links composed of four transmit and/or receive antennas, i.e. exploiting quasi-orthogonal and extended-orthogonal coding schemes. The successful deployment of these closed-loop methods is dependent upon channel state information (CSI) being available for each stage of the network. Taking the maximum end-to-end data rate as the optimal criterion, an adaptive resource allocation (RA) scheme suitable for a wide range of signal-to-noise-ratios (SNRs) and a prescribed transmit power budget is proposed to distribute appropriate resources to each stage based on the channel state information (CSI) and knowledge of the network topology. %I Loughborough University