The effects of doppler scaling in underwater acoustic OFDM communication

Multicarrier modulations have been recently proposed for high rate communications in underwater acoustic (UWA) channels. The UWA channels are wideband in nature, and far more challenging for multicarrier transmission than narrowband channels. In this paper, we investigate effects of Doppler scaling that wideband time varying multipath channels induce on orthogonal frequency-division multiplexing (OFDM) systems. We derive an exact interference power for multicarrier systems and an upper bound on intercarrier interference power for OFDM. Results represent wideband counterpart for narrowband cases described in literature.