Hamming Distance Optimized Underwater Acoustic OTFS-IM Systems

Area of Science:

• Electrical Engineering
• Signal Processing
• Underwater Communications

Background:

• Orthogonal Time Frequency Space (OTFS) modulation offers reliable communication in time-varying channels.
• Underwater acoustic channels exhibit dispersive characteristics that challenge communication reliability.
• Index Modulation (IM) can enhance the capabilities of modulation techniques.

Purpose of the Study:

• To propose and evaluate an OTFS-IM underwater acoustic communication system.
• To mitigate the impact of channel dispersion in underwater acoustic environments.
• To improve the bit error rate (BER) performance of OTFS systems in underwater scenarios.

Main Methods:

• Introduction of an OTFS-IM system incorporating index modulation in the Delay-Doppler (DD) domain.
• Application of a Hamming distance optimization model to eliminate redundant index combinations.
• Simulation analysis to verify the performance of the proposed system.

Main Results:

• The proposed OTFS-IM system demonstrates enhanced anti-Delay-Doppler capability.
• Hamming distance optimization effectively reduces index sequence redundancy.
• The optimized OTFS-IM system achieves more reliable bit error rate performance.

Conclusions:

• The developed Hamming distance optimized OTFS-IM system is effective for underwater acoustic communication.
• The system shows significant improvements in BER performance compared to conventional methods.
• This approach offers a promising solution for reliable underwater data transmission.