Despite advancements in wireless communication worldwide, wireless underwater communication remains a significant challenge. The marine environment presents unique and challenging conditions for wireless communication, rendering radio waves unsuitable for long-distance underwater communication due to the water's absorption of electromagnetic waves. As a result, acoustic waves are often used for underwater communication as they can propagate over longer distances without being quickly attenuated as radio waves. This master's thesis investigates the use of a turbo equalizer, a digital signal processing method, to examine how well it can correct for disruptions and distortions that an acoustic signal encounters while traveling through water. The turbo equalizer aims to estimate and counteract the disturbances that affect the signal during transmission in the underwater environment. Hence enable the ability to reconstruct the original message with minimal bit errors, even in the presence of disturbances from the underwater environment and thereby enabling reliable communication. The outcome of this work was a functional system for transmitting and receiving underwater messages in a water tank. The decoded messages contained some bit errors, but it was demonstrated in hindsight that fault-free communication using the turbo equalization method was possible in some instances. This result indicates that turbo equalization can be applied to real-world applications to mitigate disturbances in wireless underwater communication.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-506745 |
| Date | January 2023 |
| Creators | Hellström, Marcus |
| Publisher | Uppsala universitet, Signaler och system |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | UPTEC E, 1654-7616 ; 23008 |
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