A comparison between autocorrelation- and crosscorrelation-based coarse frame synchronization schemes for OFDM-PLC systems
Orthogonal frequency division multiplexing (OFDM)-based Power-Line Communications (PLC) systems are vulnerable to synchronization errors, and the particularities of the PLC channel affect the performance of the synchronization process. In this context, this work is focused on the initial pilot symbo...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/64076 |
| Acceso en línea: | http://hdl.handle.net/10017/64076 https://dx.doi.org/10.1016/j.phycom.2024.102419 |
| Access Level: | acceso abierto |
| Palabra clave: | Power line communication (PLC) Orthogonal frequency division multiplexing (OFDM) Frame detection Timing synchronization Electrónica Electronics |
| Sumario: | Orthogonal frequency division multiplexing (OFDM)-based Power-Line Communications (PLC) systems are vulnerable to synchronization errors, and the particularities of the PLC channel affect the performance of the synchronization process. In this context, this work is focused on the initial pilot symbol detection, presenting a comparison between autocorrelation- (AC) and crosscorrelation (CC)-based timing metrics, which include the most common preamble-based synchronization strategies. Two robust timing metrics are defined and the effect of multipath, Colored Background Noise (CBN) and Impulsive Noise (IN) is theoretically evaluated on each. A detailed analysis of the probability distributions of the timing metrics is performed and primary detection thresholds and lower bounds for the symbol detection probability are derived. Simulations of the OFDM-PLC system are performed in order to validate the analysis, considering a statistic PLC channel model and different noise sources. Results show that the CBN and IN significantly degrade the timing metrics behavior, and that the CC-based timing metric is more robust to this worsening, thus achieving a better synchronization performance than the AC-based timing metric. |
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