Low-complexity timing synchronization for OFDM based on CAZAC and Golay sequences

A low-complexity timing and frequency synchronization algorithm for Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed here. The preamble design is based on complementary pairs of sequences (Golay sequences) and Constant Amplitude Zero Auto-Correlation (CAZAC) sequences. This new approach is compared to existing alternatives in terms of complexity and performance. It is shown that this novel scheme achieves competitive performance and significantly reduces computational cost, thanks to the availability of efficient correlation architectures for complementary pairs of sequences.

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