Motorola Corporation

Freescale Semiconductor,inc.

Sekchin Chang

Weizhong Chen

Brian T Kelley

Satish S Kulkarni

A frequency offset estimator () and corresponding method () provides a frequency offset estimate () for an OFDM signal. The estimator comprises a data parser () coupled to an input signal () and arranged to select a group of symbols (-) or corresponding samples corresponding to predetermined symbols from the input signal and a processor () arranged to provide a correlation corresponding to the symbols, where the correlation corresponds to a frequency offset estimation for the input signal and is determined in a sequential fashion so that the correlation is provided concurrently with the last symbol or sample of the group of symbols to be selected.

OFDM frequency offset estimation apparatus and method

A timing and carrier error detector module () of a communication receiver (). The timing and carrier error detector module uses phase information of a correlated signal (e.g. a Barker de-spread signal) to generate a timing signal and carrier error signal. In one example, the phase information includes a phase error signal of the correlated signal. In one example, the timing and carrier error detector module calculates an indication of the variance of the phase error signal for a plurality of sample positions over a plurality of Barker symbol intervals. The timing signal is based upon the sample position having a minimum indication of a variance.

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Austin, TX, United States of America

Sekchin Chang