Optimization of Acoustic Communication Links for a Swarm of AUVs: The COMET and NEMOSENS Examples

Gussen, Camila Maria Gabriel; Laot, Christophe; Socheleau, François-Xavier; Zerr, Benoît; Mézo, Thomas Le; Bourdon, Raphaël; Berre, Céline Le

doi:10.3390/app11178200

Cited by 2 publications

(2 citation statements)

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“…Another approach consists of simulating a channel based on information on the communications environment, such as the communication range, the relative speed between the transmitter and the receiver and the water depth. This approach was used in [26]. Currently, AUVs are used for planned missions.…”

Section: On the Optimization Of The Time/frequency Allocation Of The ...mentioning

confidence: 99%

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Performance Optimization of Underwater Communication Links at Different Ranges for AIS Relay to AUV

et al. 2022

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Autonomous Underwater Vehicles (AUVs) are becoming increasingly popular for large number of civil and military applications, such as environmental monitoring, oceanography, archaeology, or mine warfare. Operational safety issue still prevents the exploitation of the full potential of AUVs. Operations of AUVs are limited by constraints including the need to guarantee no collision with manned surface vehicles. To avoid collisions, a solution is to relay surface vessel positions to the AUVs by an underwater communication link. The communication must be optimized to establish a robust and reliable link at various range and depth. Commercial underwater acoustic modems are often dedicated for specific distances and bit rates with performances strongly dependent on the environmental conditions. For the considered application, the modem must be adaptive at the time and frequency selectivity of the channel which is varying according to the operation context. In this work, we propose an adaptive underwater acoustic waveform optimized to exploit at the best the time and frequency diversity the channel. To show the potential gain obtained by using diversity, the performance of the designed modem is evaluated using theoretical and realistic underwater channels. In addition, we propose a method for adapting the waveform based only on the knowledge of the transmission geometry. Finally, the proposed modem is tested to relay Automatic Identification Systems (AIS) picture of an area to AUVs.

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Section: On the Optimization Of The Time/frequency Allocation Of The ...mentioning

confidence: 99%

“…Therefore, to exploit the time diversity, the time gap between two chips must be greater than T coh . In order to estimate the value of ∆ f and ∆ t , we use a channel simulator, such as in [26]. The overall process is presented in Figure 10.…”

Section: Choosing the Allocation Of The Spreading Codementioning

confidence: 99%