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http://dx.doi.org/10.6109/jkiice.2013.17.8.1790

A Study on Spectrum Moment Estimation in an Acoustic Doppler Current Profiler  

Lee, Jonggil (Department of Information and Telecommunication Engineering, Incheon National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.17, no.8, 2013 , pp. 1790-1795 More about this Journal
Abstract
The current velocity and turbulence information in each range cell can be obtained from the first and second Doppler spectrum moment estimates. However, the very widely used correlation method often called as the pulse-pair method has the inherent restrictions under the highly turbulent conditions since it does not satisfy the assumptions that the return Doppler spectrum should be symmetric and have a single peak value. Therefore, in this paper, the quality of pulse-pair estimates were compared with that of FFT estimates for problem analysis using various shapes of simulated Doppler spectra. It can be known that the pulse-pair method often yields meaningless results if the received signals are severely biased or multi-peak Doppler spectra in the Doppler frequency domain.
Keywords
Moment estimation; Pulse-pair method; Asymmetric Doppler spectra; Estimation bias;
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