title: High-frequency acoustic communications achieving high bandwidth efficiency.
abstract: A recent communications experiment was conducted in a shallow water environment at high-frequency permitting the use of a large bandwidth (11-19 kHz). This paper investigates the communication performance versus various symbol rates (or bandwidths) in terms of output signal-to-noise ratio with an assortment of constellations, illustrating a trade-off between performance and data rate. A high bandwidth efficiency of 4 bits/s Hz is demonstrated using 32 quadrature amplitude modulation with a data rate of 31.25 kbits/s over a 2.2-km range.
authors.affiliation: Scripps Institution of Oceanography, University of California-San Diego, La Jolla, CA 92093-0238, USA. hcsong@ucsd.edu
authors.forename: H C
authors.initials: HC
authors.lastname: Song
authors.forename: W S
authors.initials: WS
authors.lastname: Hodgkiss
authors.forename: W A
authors.initials: WA
authors.lastname: Kuperman
authors.forename: T
authors.initials: T
authors.lastname: Akal
authors.forename: M
authors.initials: M
authors.lastname: Stevenson