UDC 681.883:681.327.8
COMPARATIVE ANALYSIS OF MESSAGE TRANSMISSION METHODS IN UNDERWATER ENVIRONMENT
A. D. Koshelev, master's student of CAD Department, RSREU, Ryazan, Russia;
orcid.org/0000-0002-7401-2392, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
V. P. Fedorov, Ph.D (Tech.) associate professor of CAD Department, RSREU, Ryazan, Russia;
orcid.org/0000-0001-8597-5795, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The problem of constructing a hydroacoustic communication channel is considered. The aim of the work is to compare the known methods of encoding digital information with the proposed transmission method by the combinations of quaternary system digits set by the chords of time-shifted parcels with ultrasonic waves filling four different frequencies. This method is compared with the transmission of digital information by continuous wave modulation and with the known bipolar transmission encodings adapted to a sonar channel. The considered method of information signal construction is shown to provide greater transmission reliability due to complete self-synchronization, larger signal-to-noise ratio and larger signal base.
Key words: ultrasonic waves; transmission methods; coding; self-synchronization; signal-to-noise ratio.