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

Document Type : Original Article

Authors

1 Master's student, Specialized University of New Technologies, Amol, Iran

2 Associate Professor, Specialized University of New Technologies, Amol, Iran

3 Assistant Professor, Malek Ashtar University of Technology, Tehran, Iran

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

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References

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History

  • Receive Date: 25 February 2023
  • Revise Date: 17 July 2023
  • Accept Date: 07 August 2023
  • Publish Date: 28 September 2023

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