Abstract
Aiming at the estimation of Doppler shift factor in underwater acoustic communication, a new method based on current velocity measurement is proposed. By analyzing the relationship between current velocity and the Doppler shift factor, the calculation process of underwater acoustic communication system is simplified, the measurement method and ability of electromagnetic current meter is studied, and some on-site error sources are analyzed. The results indicate that the piecewise linear method can effectively characterize the measurement of electromagnetic current meter. Zero offset drift has to be modified frequently. The displacement effect is the main factor affecting the measurement results of the current meter, and the maximum indication error can be up to 10%.
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