
Please use this identifier to cite or link to this item:
https://www.repositorio.mar.mil.br/handle/ripcmb/844137
Title: | Sustained underwater acoustic communications with environmental-based time-reversal |
metadata.dc.contributor: | Silva, António. Jesus, Sérgio M.. |
Authors: | Maia, Lussac Prestes Silva, António Jesus, Sérgio M. |
Keywords: | Acústica Submarina |
DGPM knowledge areas: | Ciência, Tecnologia e Inovação |
Issue Date: | 2018 |
Description: | Inclui bibliografia. The usage of time-reversal in underwater communications relies on array channel matched-filtering, coherent channel replica alignment and summation. Traditionally, replicas are channel responses to probe signals received at a previous time. These are noisy and subject to distortion due to channel variability. This paper offers an alternative where noisy and potentially distorted channel replicas are replaced by noise-free and time-updated replicas generated by a numerical model constrained on previously data-identified environmental parameters. The method is applied on real data, where a quadrature phase shift key modulated signal on a 25.6 kHz carrier at 4 kbit/s was transmitted in a shallow water area over a distance of approximately 900 m. Sustained analysis without supervision shows that the proposed method may attain a mean square error gain up to 5.4 dB when compared to tradi- tional time-reversal. |
Access: | Open access |
URI: | http://www.redebim.dphdm.mar.mil.br/vinculos/00001b/00001bfa.pdf http://www.repositorio.mar.mil.br/handle/ripcmb/844137 |
Type: | Journal article |
Appears in Collections: | Ciência, Tecnologia e Inovação: Coleção de Artigos |
Files in This Item:
File | Description | Size | Format | |
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00001bfa.pdf | 557,66 kB | Adobe PDF | ![]() View/Open |
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