Study of Resistance to Disturbances of the Main Types of Communication Systems on Board Military Ships Used during Interception or Search and Rescue Missions

Vasile Solcanu,Marian Gaiceanu,Georgiana Rosu

doi:10.3390/inventions6040072

Vasile Solcanu, Marian Gaiceanu + Show 1 more

Open Access

https://doi.org/10.3390/inventions6040072

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Journal: Inventions	Publication Date: Oct 27, 2021
Citations: 3	License type: CC BY 4.0

Affiliation: "Dunarea de Jos" University of Galati

Abstract

In addition to combat missions, military ships often participate in search-and-rescue missions or interception of ships with refugees or migrants. The communication systems and modes of work that may be used during these missions will be in accordance with the International Convention for the Safety of Life at Sea (SOLAS). This paper aims to demonstrate by theoretical methods (analytical and numerical) the noise stability of communication systems using analog modulation in high-noise conditions, characteristic of the marine environment. The stability of analog systems employing amplitude (AM), frequency (FM), and phase (PM) modulations is investigated. The analyzed systems are currently under use in distress maritime communications.

Highlights

Radio communications technology was first used in maritime rescue operations in 1899 and since tens of thousands of lives have been saved [1]
The special media impact of this disaster led to the appearance of the first version of the SOLAS (International Convention for the Safety of Life at Sea) in 1914 [2]
This paper aims to demonstrate by theoretical methods the effectiveness of using analog systems in high-noise conditions—with a low signal-to-noise ratio (SNR), characteristic of the marine environment

Summary

Introduction

Radio communications technology was first used in maritime rescue operations in 1899 and since tens of thousands of lives have been saved [1]. Given the particular importance of the providing adequate transmission of distress calls, distress messages, and distress traffic, the question is whether the emission classes currently used are sufficiently resistant to disturbances or whether other technical solutions, including the transition to digital communications, must be adopted This information is useful because a possible change must be adopted at the same time by all states signing the SOLAS convention, for both civilian and military ships, which are among the first ones to intervene in distress situations.

Determining the IFD for Emission Classes J3E and J2B

Determining the IFD for Emission Classes F1B and F2B

Simulink Conclusions

Conclusions from the Technical

Findings

Conclusions