Comparison of Single-Carrier FDMA vs. OFDMA in Underwater Acoustic Communication Systems

Abstract

In this paper, we try to investigate what are differences between OFDMA and SC-FDMA in underwater acoustic (UWA) communication.
OFDMA and SC-FDMA are well known by against multi-path interference capability and bandwidth efficiency using so
both of them are also used in Downlink and Uplink in LTE. However in underwater environments where channel has limited bandwidth,
are strongly suffered from the long propagation delay, the limited bandwidth, multipath, and the Doppler effect and
big ambient noises. We firstly analyze OFDMA and SC-FDMA by simulation use acoustic channel and do an experiment to
testify the simulation results next.