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Performance evaluation of Multi-User MIMO Underwater Acoustic Communications

Antony Pottier
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Philippe Forjonel


This paper presents a study of Multiuser Multiple Input Multiple Output (MU-MIMO) as a multi-access method for underwater acoustic communications. Traditional multi-access schemes such as Time Division Multiple Access (TDMA) suffer from limited data rates due to an inefficient sharing of communication resources. In a MU-MIMO systems, each user can be viewed by the receiver as an input of a conventional MIMO channel. The receiver can then exploit the spatial diversity to decode the input streams of each users. Achievable rates of MU-MIMO with Successive Interference Cancellation (SIC) are studied in a first place, and compared with single user and TDMA theoretical performance. The theoretical rates are computed on channels sounded at-sea for a two-user configuration so as to evaluate what gains can be expected from the MU-MIMO approach. Finally, comparisons with the effective rates obtained from simulations of full modulation and demodulation stages using measured channels and the underWater AcousTic channEl Replay benchMARK (WATERMARK) are provided.
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hal-03376552 , version 1 (13-10-2021)


  • HAL Id : hal-03376552 , version 1


Antony Pottier, Pierre-Jean Bouvet, Philippe Forjonel. Performance evaluation of Multi-User MIMO Underwater Acoustic Communications. 2021 fifth Underwater Communications and Networking Conference (UComms), Aug 2021, Lerici, Italy. ⟨hal-03376552⟩
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