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Coded-GFDM for Reliable Communication in Underwater Acoustic Channels
Mohsin Murad1,2,3, Imran A Tasadduq3, Pablo Otero1,2
1Telecommunication Engineering School, University of Malaga, 29071 Malaga, Spain.
Sensors (Basel, Switzerland)
|April 12, 2022
Summary
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.
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.
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