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Samsami Khodadad, F., ehteshamfar, M., nazari, F., alirezapouri, M. (2023). A new method for data transmission in shallow water channel based on offset multi-carrier filter bank. Electronic and Cyber Defense, 11(3), 25-34.
Farid Samsami Khodadad; makan ehteshamfar; fakhroddin nazari; mohammadali alirezapouri. "A new method for data transmission in shallow water channel based on offset multi-carrier filter bank". Electronic and Cyber Defense, 11, 3, 2023, 25-34.
Samsami Khodadad, F., ehteshamfar, M., nazari, F., alirezapouri, M. (2023). 'A new method for data transmission in shallow water channel based on offset multi-carrier filter bank', Electronic and Cyber Defense, 11(3), pp. 25-34.
Samsami Khodadad, F., ehteshamfar, M., nazari, F., alirezapouri, M. A new method for data transmission in shallow water channel based on offset multi-carrier filter bank. Electronic and Cyber Defense, 2023; 11(3): 25-34.

A new method for data transmission in shallow water channel based on offset multi-carrier filter bank

پدافند الکترونیکی و سایبری
Article 3, Volume 11, Issue 3 - Serial Number 43, January 2024, Pages 25-34    PDF (1.03 M)
Document Type: Original Article
Authors
Farid Samsami Khodadad* 1; makan ehteshamfar2; fakhroddin nazari2; mohammadali alirezapouri3
1Master's student, Specialized University of New Technologies, Amol, Iran
2Associate Professor, Specialized University of New Technologies, Amol, Iran
3Assistant Professor, Malek Ashtar University of Technology, Tehran, Iran
Receive Date: 25 February 2023,  Revise Date: 17 July 2023,  Accept Date: 07 August 2023 
Abstract
In underwater acoustic channels, due to the limited bandwidth, the extension of the long delay due to the low speed of sound propagation, and also due to severe time changes, the establishment of a stable and efficient communication has always been accompanied by obstacles. Therefore, the use of orthogonal multi-input multi-Output multi-Carrier systems is common, but the challenge is that due to the use of long-distance rotary prefix for underwater channels, bandwidth gain and data transfer rate are greatly reduced. The proposed solution in this paper is to use multi-carrier systems based on offset bank filters. By using these systems, due to the lack of rotational prefix, the orthogonal frequency division system will no longer have problems and therefore will see an increase in interest and an increase in transmission rate in its multi-input-multi-output type. In this article, for the first time, a Hermit pulse forming filter is used, which has more accuracy and operational power than other filters. Also, in order to eliminate the destructive interference, the equalizer of at least average squares error has been used. The simulation results show the optimal performance of the proposed subsurface transmission system in shallow water. The output of simulations and numerical analysis has shown that at the rate equal to the error rate, the proposed system has a 15% higher send and receive rate, which is a valuable achievement in complex underwater conditions.
Keywords
Underwater transmission; offset filter bank; orthogonal multi-carrier multi-input-multi-output system; Hermite pulse shaping filter; equalizer of minimum mean square error
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