Title:
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Asymptotic equivalence between the unconditional maximum likelihood and the square-law nonlinearity symbol timing estimation
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Author:
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López Salcedo, José Antonio; Vázquez Grau, Gregorio
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
Abstract:
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This paper provides a systematic approach to the
problem of nondata aided symbol-timing estimation for linear
modulations. The study is performed under the unconditional
maximum likelihood framework where the carrier-frequency
error is included as a nuisance parameter in the mathematical
derivation. The second-order moments of the received signal are
found to be the sufficient statistics for the problem at hand and they
allow the provision of a robust performance in the presence of a
carrier-frequency error uncertainty. We particularly focus on the
exploitation of the cyclostationary property of linear modulations.
This enables us to derive simple and closed-form symbol-timing
estimators which are found to be based on the well-known square
timing recovery method by Oerder and Meyr. Finally, we generalize
the OM method to the case of linear modulations with
offset formats. In this case, the square-law nonlinearity is found
to provide not only the symbol-timing but also the carrier-phase
error. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal -Information theory -Asymptotic equivalence -Closed-form symbol-timing estimation -Cyclostationary property -Linear modulation -Maximum likelihood estimation -Modulation -Nondata aided symbol-timing estimation -Second-order moments -Square-law nonlinearity symbol timing estimation -Square timing recovery method -Unconditional maximum likelihood -Teoria de la informació |
Rights:
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Document type:
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Article |
Published by:
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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