Journal of Advanced Defense Science & Technology

Journal of Advanced Defense Science & Technology

Usage of Turbo Coding to Improve the Performance of Underwater Telecommunication Systems Based on Adaptive OFDM Modulation

Document Type : Original Article

Authors
mohammad eshaghi kenari 1
Fakhroddin Nazari 2
Farid Samsami Khodadad 3
Mohammadali Alirezapouri 4
1 ausmt
2 Faculty of Engineering. Amol University of Special Modern Technologies, Amol, Iran
3 Faculty of Engineering Technology, Amol University of Special Modern Technologies, Amol, Iran.
4 mut
Abstract
The most important limitations for wireless underwater telecommunication systems are multipath, fading, attenuation, and extensive interference in underwater channels. In these channels, due to wide changes in the signal-to-noise ratio, transmitting and receiving in fixed modulation mode does not have the desired performance. For this reason, in this paper, the use of turbo coding to encode an adaptive modulation system based on orthogonal frequency division multiplexing (OFDM) is introduced for the first time, which reduces the transmission error and also achieves high efficiency. In the proposed system model, the optimal system was achieved by selecting appropriate parameters for communication in the underwater acoustic environment and also choosing proper modulation modes, which decreases the bit error rate by 16% compared to other systems introduced so far for underwater acoustic communication.
Keywords
Adaptive Modulation
Orthogonal Frequency Division Multiplexing
OFDM
Multi-Carrier Modulation
Underwater Communication
Turbo Coding
Subjects

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Journal of Advanced Defense Science & Technology
Volume 13, Issue 3 - Serial Number 49
Winter
Winter 2023
Pages 167-176

  • Receive Date 26 July 2022
  • Revise Date 19 October 2022
  • Accept Date 02 November 2022
  • Publish Date 22 November 2022