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A cross layer scheme of resource allocation is proposed for the delay sensitive service in OFDMA wireless system. The minimal and maximal rates of users are given according to the delay threshold of the service and queue state info at MAC. The minimal rate guarantees the quality of service and fairness of users, whereas the maximal rate increases the resource usage efficiency. With these rate constraints,...
We use an asymmetric 8-PSK signal sets in the 4-state rate 2/3 trellis-coded modulation concatenated with space-time block coding (TCM-STBC) scheme for fast fading channels, and show performance gain over TCM-STBC scheme with symmetric 8-PSK constellations. The performance gain is due to an increase in the minimum product-sum distance and free distance of trellis code compared to that of the symmetric...
A phase-sweeping space-time-frequency bit interleaved coded modulation (PS-STF-BICM) is presented. By expanding the dimensions of sweeping matrix we achieve the correlation between the adjacent code matrices, and further time diversity is realized, and by further time diversity higher diversity gain is realized which effectively avoid possible burst errors in block fading channels. Also, the Singleton...
In this paper, we propose a phase-sweeping space-time-frequency bit interleaved coded modulation (PS-STF-BICM) scheme. By expanding the dimensions of sweeping matrix we achieve the correlation between the adjacent code matrices, and further time diversity is realized, and by further time diversity higher diversity gain is realized which effectively avoid possible burst errors in block fading channels...
A phase-sweeping space-time bit interleaved coded modulation (PS-ST-BICM) is presented. By expanding the dimensions of sweeping matrix we achieve the correlation between the adjacent code matrices, and further time diversity is realized, and by further time diversity higher diversity gain is realized which effectively avoid possible burst errors in block fading channels. The optimum criterion of the...
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