Investigating Channel Modeling and Propagation Characteristics for High-Frequency Links in Deep-Sea Applications

Abstract

In the study of deep maritime operation and communication or underwater activity, there is a growing interest to improve the use of High Frequency (HF) and Very High Frequency (VHF) deep sea communication links to make them more trustworthy, faster and faster due to the demand in high speed seamless communication. Though, the continuity of the deep sea channels present obstacles for effective and accurate modeling deep maritime processes . This research emphasizes the study of the gap in telecommunications and propagation of HF pulses within deep seas looking particularly into marine EM waves and their behavior in oceans. In our, both theoretical and qualitative approaches, we determine the impacts of severe conditions such as saline waters, pressure, temperature, seabed structure, dual signal pathways, and dynamic environment on signals attenuation and coherence. The study implements experiments capture changes of the channel over varying depths and horizontal distances with dynamic currents and marine surface motion. Such research is unique because, besides pointing out benchmarks of communication robustness, it also assesses the challenges brought by environmental variations exposures. Such feedback alongside the classic low saddle frequency acoustic communication systems shows substantial pros along with cons of Sonar Technology namely short, swift, data burst communication range using EM based HF. In the end of the assessment, the study proposes enhanced EM and acoustic hybrid communication dealing advanced modulation systems that change these systems based on the conditions and specifications. The goal of this research is to support effective deep-sea communication systems which can be deployed deep in the seas for marine ecosystems monitoring targeted for AUV systems.