This article presents orthogonal frequency division multiplexing (OFDM) that is based on
discrete Hartley transform (DHT) as a modulation transform for underwater acoustic (UWA) …

The discrete Fourier transform (DFT) precoded orthogonal frequency-division multiplexing
(OFDM) has been adopted as the uplink transmission technique in the long-term evolution …

A key research area in wireless transmission is underwater communications. It has a vital
role in applications such as underwater sensor networks (UWSNs) and disaster detection …

Time-domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) is
presented to enhance the spectral and energy efficiency over the conventional cyclic prefix …

The objective of this study is to investigate a novel Underwater Acoustic Communication
(UWAC) system based on a modulated chirp signal termed as Orthogonal Chirp Division …

The Doppler effect critically degrades the performance of orthogonal frequency division
multiplexing (OFDM) systems in general. This problem is significantly worse for underwater …

The supported bandwidth of the underwater communication systems is limited to several kilo
hertz, which considers as the main challenge for Underwater Acoustic (UWA) …

The available bandwidth of underwater environment tends to several kilohertz, which
considers the main challenges of communications under sea water. On the other hand, the …

A novel fully quadrature subcarrier-index shift keying orthogonal frequency division
multiplexing (FQSISK-OFDM) modulation scheme for underwater acoustic communications …

Differential orthogonal frequency division multiplexing (OFDM) is practically attractive for
underwater acoustic communications since it has the potential to obviate channel …