High-frequency acoustic communications achieving high bandwidth efficiency.
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.
Song
H C
HC
Scripps Institution of Oceanography, University of California-San Diego, La Jolla, CA 92093-0238, USA. hcsong@ucsd.edu
Hodgkiss
W S
WS
Kuperman
W A
WA
Akal
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T
Stevenson
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M