English
Ciência-IUL
Publicações
Descrição Detalhada da Publicação
Power efficient back-off reduction through polyphase filtering magnitude modulation
Título Revista
IEEE Communications Letters
Ano (publicação definitiva)
2009
Língua
Inglês
País
Estados Unidos da América
Mais Informação
Web of Science®
Scopus
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Abstract/Resumo
A multistage polyphase magnitude modulation (MPMM) technique is proposed for single carrier (SC) modulations, to efficiently reduce the peak-to-average power ratio (PAPR) of the bandwidth limited signal resulting from root-raised cosine (RRC) filtering. We show that the application of back-off to the transmitter high-power amplifier (HPA), in order to avoid nonlinear distortion and thus spectral regrowth, can be almost eliminated, even at very low roll-off values, leading to system's high power efficiency. We also show that noise sensitivity due to MPMM is considerably minimized by improving the initial receiver's soft-decoding estimates, based on the average positions of the MPMM constellation symbols.
Agradecimentos/Acknowledgements
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Palavras-chave
Back-off,Magnitude modulation,Peak-to-average power ratio (PAPR),Polyphase decomposition,RRC filter
Classificação Fields of Science and Technology
- Engenharia Eletrotécnica, Eletrónica e Informática - Engenharia e Tecnologia
Registos de financiamentos
| Referência de financiamento | Entidade Financiadora |
|---|---|
| SFRH/BD/38338/2007 | Fundação para a Ciência e a Tecnologia |
