| Autor: |
Zaqueu Cabral Pereira, Thiago Henrique Ton, Joao Luiz Rebelatto, Richard Demo Souza, Bartolomeu F. Uchoa-Filho |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 6, Pp 6550-6559 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2018.2789861 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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