Comments: (pdf)
Ref.: Underwater Communications and Network Conf., Lerici (Italy), September 2024
Abstract:
The transmission of circular and spiral acoustic fields using spiral beacons offers a promising alternative
to traditional underwater localization methods. Existing literature typically employs time multiplexing of
these field types. This work introduces a novel approach by implementing both time and frequency multiplexing
of circular and spiral fields, specifically transmitting three circular and one spiral field at distinct
times and frequencies. The proposed multiplexing methods were evaluated at two different underwater environments:
a controlled pool environment and a natural lagoon setting. The localization results demonstrate that the
proposed method significantly reduces azimuth variability and confirms its functionality in a lagoon, although
with less accuracy compared to the pool test. Overall, time and frequency multiplexing proved to be an effective
strategy to enhance current spiral beacon systems and holds potential for advancing new underwater joint
communication and localization techniques.