access icon openaccess Preamble-aided time delay estimation in frequency selective channels for wireless OFDM systems

In this Letter, an improved method for estimating the time delay in preamble-aided orthogonal frequency division multiplexing systems is presented. It uses a conventional preamble structure and combines cross-correlation techniques to achieve estimations of time delay and the number of multipaths without any additional overhead. Computer simulations results show that the proposed method is of near-ideal property in frequency-selected channels.

Inspec keywords: wireless channels; delay estimation; OFDM modulation

Other keywords: multipath number; preamble-aided orthogonal frequency division multiplexing systems; frequency selective channel; computer simulation; cross-correlation technique; preamble-aided time delay estimation; preamble structure; wireless OFDM systems

Subjects: Radio links and equipment; Other topics in statistics; Modulation and coding methods

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