Resumo

PEREIRA RUISANCHEZ, Dariel; DIAZ HERNANDEZ, Reinier  e  FONTES PUPO, Ernesto. Design and Implementation of Synchronization Algorithms for DTMB. EAC [online]. 2018, vol.39, n.2, pp.24-39. ISSN 1815-5928.

In this paper, two frame synchronization schemes and one frequency synchronization scheme are proposed for TDS-OFDM, technique that DTMB uses. The first frame synchronization model is based on the value of the autocorrelation of the received signal. The second uses the result of the correlation of this signal with locally generated PN. This way, two solutions for the same problem are presented, each one with its own singularities on implementation method and performance characteristics. The fine frequency synchronization model uses the alternating PN autocorrelation algorithm. It enjoys the maximum length of identical PN between non-consecutive guard intervals. The tests are realized over different channel models with AWGN and multi-path fadings or Doppler Effect fadings. The validation of the schemes is gotten through the simulation results in MatLab/Simulink models and its comparison with the scientific literature. A brief introduction to DTMB standard is realized and a special attention is given to synchronization stages, signal frames structure and the use of PN sequences as frame header

Palavras-chave : Synchronization; DTMB; correlation; TDS-OFDM.

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