Utilize este identificador para referenciar este registo:
http://hdl.handle.net/11144/3686
Título: | Uplink Performance Evaluation of Packet Combining ARQ for MPR Prefix-Assisted DS-CDMA |
Autor: | Dinis, Rui Ganhão, Francisco Bernardo, Luis Pinto, Paulo Oliveira, Rodolfo |
Palavras-chave: | Packet combining ARQ Prefix-assisted DSCDMA IB-DFE DTMC Analytical model. |
Data: | 2015 |
Editora: | IEEE Publisher |
Resumo: | Prefix-assisted direct-sequence code-division multiple access (DS-CDMA) is a viable transmission technique for high-data-rate wireless broadband systems, capable of coping with highly dispersive channels at the uplink. Packet combining (PC) ARQ with an iterative block decision feedback equalization (IB-DFE) technique can be used to cope with errors. However, extracting the IB-DFE's packet error rate (PER) for MAC-layer simulations can be time consuming. Most works that model the DS-CDMA behavior with PC ARQ use simplified asymptotic PER models in the study of the system performance, which are not precise for low signal-to-noise ratios and for a low number of mobile terminals (MTs). In this paper, the MAC performance is modeled using a discrete-time Markov chain that relies on a PER model. As an example, this paper describes a PER analytical model for an uncoded prefix-assisted DS-CDMA system with PC ARQ that considers the following inputs: the number of MTs accessing the channel, the MTs' number of transmissions, and the channel realizations for a given bit energy over noise ratio. The results show that the model portrays with better accuracy the simulations' results, compared with an alternative asymptotic model. |
Revisão por Pares: | yes |
URI: | http://hdl.handle.net/11144/3686 |
metadata.dc.identifier.doi: | 10.1109/TCOMM.2015.2434878 |
ISSN: | 0090-6778 |
Versão do editor: | https://ieeexplore.ieee.org/document/7109836/ |
Aparece nas colecções: | DCT - Artigos/Papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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UPLINK.pdf | 150,97 kB | Adobe PDF | Ver/Abrir |
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