Abstract
Underwater communications at low frequencies are characterized by
the low data rate. But in some cases wireless sensors must be placed quite close
to each other and need high data rates in order to accurately sense an ecosystem
that could be contaminated by invasive plants or hazardous waste. Most
researchers focus their efforts on increasing the data transfer rates for low
frequencies, but, due to the wave features, this is very complicated. For this
reason, we propose the use of high frequency band communications for these
special cases. In this paper we measure the optimum working frequency for an
underwater communication in the 2.4 GHz range. We measure the number of
lost packets and the average round trip time value for a point-to-point link for
different distances. These measures will be performed by varying the data rate,
the type of modulation and the working frequency. We will show that we are
able to transmit higher data transfer rates, by using higher frequencies, than the
using acoustic waves.
