@inproceedings{620a95abe272461480840f6b0ddfe458,
title = "Multi-user Communications for Acoustic OFDM: A Broadband Beamforming Approach",
abstract = "We propose the design of a beamforming technique for multi-user communications over acoustic channels. Our work focuses on multi-carrier modulation in the form of orthogonal frequency division multiplexing (OFDM), which is suitable for broadband acoustic channels. The framework consists of multiple users transmitting to a common base station equipped with a uniform linear array. The base station iteratively steers a beam to each user's propagation path while placing nulls in the direction of other paths. Finally, the multiple paths of the desired user are recombined before data detection. The design concepts are demonstrated in simulation for an underwater channel, and using experimental over-the-air transmissions in an indoor environment of an acoustic communications testbed.",
keywords = "Acoustic broadband beamforming, Channel estimation, Doppler, Multipath, OFDM, SDMA, direction of arrival (DOA), multi-user communications",
author = "Cuji, \{Diego A.\} and Zhengnan Li and Milica Stojanovic",
note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 6th Underwater Communications and Networking Conference, UComms 2022 ; Conference date: 30-08-2022 Through 01-09-2022",
year = "2022",
doi = "10.1109/UComms56954.2022.9905699",
language = "English",
series = "2022 6th Underwater Communications and Networking Conference, UComms 2022",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2022 6th Underwater Communications and Networking Conference, UComms 2022",
}