A Block-Parallel Architecture for Initial and Fine Synchronization in OFDM Systems

Abstract : A novel low complexity parallel algorithm and its associated architecture are proposed for initial synchronization in orthogonal frequency division multiplexing (OFDM) systems. The method is hierarchical and uses auto-correlation for the first step and cross-correlation for the second step. The main advantage of the proposed approach is that it reduces the computational complexity by a factor of five (80%), while achieving similar mean square error (MSE) as cross-correlation based methods. The method uses block-level parallelism for auto-correlation step, which speeds up the computation significantly. After fixed-point analysis, a parallel architecture is proposed to accelerate both coarse and fine synchronization steps. This parallel architecture is scalable and provides speed-up proportional to number of parallel blocks.
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Pramod Udupa, Olivier Sentieys, Pascal Scalart. A Block-Parallel Architecture for Initial and Fine Synchronization in OFDM Systems. IEEE International Conference on Communications (ICC), 2013, Budapest, Hungary. pp.4761-4765, ⟨10.1109/ICC.2013.6655326⟩. ⟨hal-00931445⟩

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