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Coded-GFDM for Reliable Communication in Underwater Acoustic Channels.

Mohsin Murad^1,2,3, Imran A Tasadduq³, Pablo Otero^1,2

¹Telecommunication Engineering School, University of Malaga, 29071 Malaga, Spain.

Sensors (Basel, Switzerland)

|April 12, 2022

Summary

This summary is machine-generated.

Coded generalized frequency division multiplexing (GFDM) enhances underwater acoustic communication reliability. Bose, Chaudari, and Hocquenghem (BCH) and Reed-Solomon (RS) codes significantly improve error performance in acoustic channels.

Keywords:

block codes convolutional codes generalized frequency division multiplexing underwater acoustic

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Area of Science:

Underwater acoustic communication systems
Digital signal processing for wireless communication

Background:

Acoustic transmission is preferred for underwater acoustic channels (UAC) due to limitations of radio and light waves.
Orthogonal frequency division multiplexing (OFDM) is used but has high peak-to-average power ratio (PAPR) and out-of-band (OOB) emissions.

Purpose of the Study:

To evaluate the performance of a coded generalized frequency division multiplexing (GFDM) transceiver in a shallow UAC.
To compare the error performance of different channel coding schemes (BCH, RS, convolutional codes) with GFDM.
To assess the impact of Matched Filter (MF) and Zero-Forcing (ZF) equalizers on the GFDM system.

Main Methods:

Implemented a coded-GFDM system for underwater acoustic communication.
Tested Bose, Chaudari, and Hocquenghem (BCH) codes, Reed-Solomon (RS) codes, and convolutional codes for error performance.
Evaluated system performance using Matched Filter (MF) and Zero-Forcing (ZF) equalizers.

Main Results:

BCH (31,6) and RS (15,3) block codes demonstrated the best error performance among tested block codes.
Rate 1/4 convolutional codes performed best among convolutional codes, but were outperformed by BCH and RS codes.
The Zero-Forcing (ZF) equalizer showed marginally better performance than the Matched Filter (MF) equalizer.

Conclusions:

Channel coding schemes significantly enhance the error performance and reliability of GFDM systems in UAC.
Coded GFDM offers improved spectral efficiency and reliability over traditional OFDM for underwater acoustic communication.
The proposed coded GFDM system provides a robust solution for reliable underwater acoustic communication despite increased complexity.