Generalized Network-Coded Cooperation in OFDMA Communications

Cooperative communication is a well-established technique to obtain diversity and consequently combat the fading inherent to the wireless channel. In a recent work, network-coded cooperation (NCC) along with graph theory-aided subcarrier allocation was applied to an OFDMA network where multiple sour...

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Veröffentlicht in:IEEE access 2018-01, Vol.6, p.6550-6559
Hauptverfasser: Pereira, Zaqueu Cabral, Ton, Thiago Henrique, Rebelatto, Joao Luiz, Souza, Richard Demo, Uchoa-Filho, Bartolomeu F.
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Sprache:eng
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Zusammenfassung:Cooperative communication is a well-established technique to obtain diversity and consequently combat the fading inherent to the wireless channel. In a recent work, network-coded cooperation (NCC) along with graph theory-aided subcarrier allocation was applied to an OFDMA network where multiple source nodes have independent information to transmit to a common destination. In the so-called NCC-OFDMA scheme, diversity is then obtained by means of space and frequency, showing that the aforementioned scheme is capable of achieving improved diversity-multiplexing tradeoff (DMT) over other schemes presented in literature. In this paper, we present a generalization of the NCC-OFDMA scheme, where time dimension is also exploited to improve the DMT. Moreover, in our proposed scheme, referred to as generalized dynamic network coding-OFDMA, we show that the network performance (either in terms of DMT or energy efficiency) can be increased even further by relaxing a constraint imposed to the NCC-OFDMA scheme that only a set of nodes is able to transmit redundant information.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2018.2789861