Abstract
ADCP is a sonar that attempts to produce a record of water current velocities for a range of depths. When testing the accuracy of ADCP, estimating the carrier frequency of ADCP is required. However, a variety of measurement techniques based on fixed-sampling algorithm, it is difficult to meet the requirements of simple calculation, high speed and accuracy. A new technique is introduced in this paper for frequency estimation algorithm based on Fourier transform and variable sampling rate method. The measurement algorithm avoids complex operation with low computational complexity. Simulation results show that the algorithm is high accuracy, and is suitable for application in estimating the carrier frequency of ADCP.
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