Abstract
Current long-range underwater acoustic communication (UWAC) faces many difficulties such as great propagation loss, high ambient noise and long multi-path delay. In order to design an excellent long-range UWAC system, it is necessary to increase signal-to-noise ratio (SNR), suppress inter-symbol interference (ISI) and alleviate frequency selective fading. In this paper, a novel time frequency shift keying scheme named as Multi-channel Hex Four Time Four Frequency Shift Keying (McH-4T4FSK) is presented. Both theoretical analysis and simulation over Bellhop multi-path channel model indicate that McH-4T4FSK exhibits lower bit error rate (BER) at the same SNR compared with traditional Frequency Shift Keying (FSK) regardless of diversity or not. Moreover, shallow water sea trial experiments at Xiamen Port with 15km distance and at Taiwan Strait with 30km distance confirm that McH-4T4FSK possesses lower BER and better robustness.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
