English
Ciência-IUL
Publicações
Descrição Detalhada da Publicação
Analytical computation of the correlation of spreading sequences for nonlinear OQPSK-type modulations
Título Revista
Transactions on Emerging Telecommunications Technologies
Ano (publicação definitiva)
2012
Língua
Inglês
País
Estados Unidos da América
Mais Informação
Web of Science®
Scopus
Google Scholar
Abstract/Resumo
In this paper we study the behavior and correlation properties of some spreading sequences when applied to a system using nonlinear offset quadrature phase-shift keying-type modulations. These signals, which include as special cases continuous-phase modulation schemes, can be designed to have very low envelope fluctuations or even a constant envelope, making them compatible with a very low-cost and power-efficient grossly nonlinear amplification. We use an analytical method to derive the correlation of those signals. The resulting expressions are then applied to maximum-length sequences, Kasami, and Tomlinson, Cercas, Hughes sequences. It is shown that Tomlinson, Cercas, Hughes sequences have better correlation properties than other spreading sequences.
Agradecimentos/Acknowledgements
--
Palavras-chave
PN sequences; Nonlinear modulations; Correlation behavior
Classificação Fields of Science and Technology
- Engenharia Eletrotécnica, Eletrónica e Informática - Engenharia e Tecnologia
