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A novel coordinated scheduling algorithm for OFDM-based systems in multi-cell scenario is proposed in this paper. The studied algorithm based on the utility function is general for the downlink of networks. The algorithm coordinates the subcarrier assignment over the BS cluster. We first establish the framework for this inter-cell coordinated optimization problem through utility-based method. The...
In this paper, we propose a channel mean forwarded (CMF) relay scheme with gammamin-MRC demodulator at the destination for cooperative OFDM systems. For regenerative cooperative communications, i.e., decode-and-forward (DF) scheme, using the classical MRC demodulator, may not give satisfactory system performance since the channel quality of the source-to-relay (S-R) link is not exploited at the destination...
In this paper, we propose an adaptive space-time (ST) multiband (MB) orthogonal frequency division multiplexing (OFDM) scheme for the ultra-wideband (UWB) systems to exploit both the spatial and spectral diversity of the rich multipath indoor fading channels. First, due to the quasi-static characteristics of the UWB indoor fading channels and the specific band-hopping patterns designed for supporting...
Recent work in literature suggests the use of companding transforms to reduce the peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) systems. However, previous performance evaluations assume the availability of infinite bandwidth. In bandlimited conditions, the performance deteriorates as a result of filtering out the out-of-band radiation (OBR). In this letter,...
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