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- W2388893868 abstract "In this paper, the signal and noise of broadband moving medium reverberation are supposed to be colored complex Gaussian processes. When the sample number is large, both the mean and variance of the first power spectral moment estimator by covariance techniques are obtained. The results obtained by D. S. ZRNIC[8], where the noise is assumed to be white,are generalized The transmitted signal is pseudo noise (PN) train and consists of two same subtrains between which the difference is only a time delay. In order to simplify the analysis,the center frequency and frequency bandwidth of both signal and noise are also assumed to be equal. It is shown that the mean of the first power spectral moment estimate is an unbiased estimate and that the variance of this estimate is dependent on (1) the correlation coefficient ρ between two subtrains, (2) the signal-to-noise ratio S/N and (3) △fTL, where △f, T and L are the frequency bandwidth, time duration and total number of pulse elements in a subtrain respectively. Three thousand groups of narrow-band-signal data obtained in field are analyzed.Then the range of ρ is determined. All these results are very useful in desiglling a broadballd acoustic Doppler current profiler (BBADCP)." @default.
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- W2388893868 date "1996-01-01" @default.
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- W2388893868 title "Spectral moment estimates of broadband backscattering acoustic wave in moving medium" @default.
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