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Conditional maximum likelihood timing recovery: estimators and bounds
dc.contributor.author | Riba Sagarra, Jaume |
dc.contributor.author | Sala Álvarez, José |
dc.contributor.author | Vázquez Grau, Gregorio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
dc.date.accessioned | 2008-01-23T14:20:48Z |
dc.date.available | 2008-01-23T14:20:48Z |
dc.date.created | 2001-04-30 |
dc.date.issued | 2001-04-30 |
dc.identifier.citation | Riba Sagarra, J.; Sala Alvarez, J.; Vazquez Grau, G. Conditional maximum likelihood timing recovery: estimators and bounds. IEEE Transactions on Signal Processing. 2001, vol. 49, núm. 4 p. 835-850. |
dc.identifier.issn | 1053-587X |
dc.identifier.uri | http://hdl.handle.net/2117/1522 |
dc.description.abstract | This paper is concerned with the derivation of new estimators and performance bounds for the problem of timing estimation of (linearly) digitally modulated signals. The conditional maximum likelihood (CML) method is adopted, in contrast to the classical low-SNR unconditional ML (UML) formulation that is systematically applied in the literature for the derivation of non-data-aided (NDA) timing-error-detectors (TEDs). A new CML TED is derived and proved to be self-noise free, in contrast to the conventional low-SNR-UML TED. In addition, the paper provides a derivation of the conditional Cramér–Rao Bound (CRB ), which is higher (less optimistic) than the modified CRB (MCRB) [which is only reached by decision-directed (DD) methods]. It is shown that the CRB is a lower bound on the asymptotic statistical accuracy of the set of consistent estimators that are quadratic with respect to the received signal. Although the obtained bound is not general, it applies to most NDA synchronizers proposed in the literature. A closed-form expression of the conditional CRB is obtained, and numerical results confirm that the CML TED attains the new bound for moderate to high Eg/No. |
dc.format.extent | 835-850 |
dc.language.iso | eng |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal |
dc.subject.lcsh | Signal detection |
dc.subject.other | Array signal processing |
dc.subject.other | Asymptotic statistical accuracy |
dc.subject.other | Pulse shaping |
dc.subject.other | Maximum likelihood estimation |
dc.subject.other | Modulation |
dc.subject.other | Signal detection |
dc.subject.other | Synchronisation |
dc.subject.other | Conditional maximum likelihood timing recovery |
dc.subject.other | Timing |
dc.subject.other | Performance bounds |
dc.subject.other | Maximum likelihood estimators |
dc.subject.other | Timing estimation |
dc.subject.other | Digitally modulated signals |
dc.subject.other | Linearly modulated signals |
dc.subject.other | Nondata-aided |
dc.subject.other | Timing-error-detectors |
dc.subject.other | Self-noise free |
dc.subject.other | Conditional Cramer-Rao bound |
dc.subject.other | Modified CRB |
dc.subject.other | Asymptotic statistical accuracy |
dc.subject.other | NDA synchronizers |
dc.subject.other | Closed-form expression |
dc.subject.other | Sensor array processing |
dc.subject.other | Discrete-time signal model |
dc.title | Conditional maximum likelihood timing recovery: estimators and bounds |
dc.type | Article |
dc.subject.lemac | Processament del senyal |
dc.contributor.group | Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
dc.description.peerreviewed | Peer Reviewed |
dc.rights.access | Open Access |
dc.relation.projectidctt | TIC98-0703 |
dc.relation.projectidctt | TIC99-0849 |
dc.relation.projectidctt | TIC2000-1025 |
dc.relation.projectidctt | FIT-070000-2000-649 |
dc.relation.projectidctt | SGR-00083 |
local.personalitzacitacio | true |
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