A Method for Underwater Wireless Data Transmission in a Hydroacoustic Channel under NLOS Conditions

Sensors

Jerzy Mizeraczyk¹  Ryszard Studanski¹  Agnieszka Czapiewska²  Andrzej Zak³ 

[1] Faculty of Electrical Engineering, Gdynia Maritime University, Morska 81-87, 81-255 Gdynia, Poland;Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland;Faculty of Mechanical and Electrical Engineering, Polish Naval Academy, Smidowicz 69, 81-127 Gdynia, Poland;

关键词: underwater communication;    NLOS;    MFSK;    data transmission;    hydroacoustic channel;    diversity combining;   

DOI  :  10.3390/s21237825

来源: DOAJ

【 摘 要 】

Wireless data transmission in the hydroacoustic channel under non-line-of-sight (NLOS) propagation conditions, for example, during a wreck penetration, is difficult to implement reliably. This is mostly due to the multipath propagation, which causes a reduction in the quality of data reception. Therefore, in this work an attempt has been made to develop a reliable method of wireless underwater communication test it under the NLOS conditions. In our method, we used multiple frequency-shift keying (MFSK) modulation, sending a single bit on two carriers, and diversity combining. The method was tested in laboratory conditions which simulated underwater signal propagation during the penetration of the wreck. The propagation conditions were investigated by determining the impulse responses at selected measurement points using the correlation method. Additionally, for comparison, the data transmission quality was determined by the bit error rate (BER) under the same conditions using direct sequence spread spectrum (DSSS) and binary phase shift keying (BPSK) modulation. The obtained results confirmed the usefulness of the application of the developed method for wireless data transmission in a hydroacoustic channel under NLOS conditions.

【 授权许可】

Unknown