Stealthy Information Transmission in the Terrestrial GMDSS Radiotelephone Communication

ABSTRACT: Audio watermarking (AW) technology is considered for stealthy information embedding directly into audio signal. Inherent in analog radiotelephone channel interferences against watermarks are analyzed. Robust encoding/decoding algorithms are presented and appropriate project of AW system named as Automatic Radio Telephone Identification System (ARTIS) is proposed. Experimental results for the practical VHF radio channel are presented. Relating on processing complexity the designed system enables imperceptibly transmit data on a rate up to 260 bit/sec in the standard VHF radio channel. ARTIS provides the full compatibility with the existing radio installation, and doesn?t require replacement of standard VHF transceivers and operational procedures. Besides, automatic identification the system may be used in the special applications, for example, under the threat of terrorist attack; generally contributes to navigation safety and information security.

KEYWORDS: Radiocommunication, Global Maritime Distress and Safety System (GMDSS), Audio Watermarking (AW), Automatic Radio Telephone Identification System (ARTIS), Very High Frequency (VHF), Terrestrial GMDSS Radiotelephone Communication, Intersymbol Interference (ISI), Orthogonal Frequency Division Multiplexing (OFDM)

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Citation note:

Shishkin A.V., Koshevoy V.M.: Stealthy Information Transmission in the Terrestrial GMDSS Radiotelephone Communication. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 7, No. 4, doi:10.12716/1001.07.04.09, pp. 541-548, 2013

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