Abstract
Doppler effect causes loss of orthogonality in Orthogonal Frequency Division Multiplexing (OFDM), which in turn may severely degrade receiver performance. In high data rate underwater acoustic communication (UAC) systems, the effect of Doppler varies considerably over OFDM band. This research presents an algorithm to avoid and/or to compensate the effect of varying Doppler shift over OFDM sub-carriers in order to maintain orthogonality and/or to compensate loss of orthogonality.
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