
Accession Number : ADA114871
Title : Optimum Sampling Times for Spectral Estimation.
Descriptive Note : Final rept. 1 Mar 8128 Feb 82,
Corporate Author : NEW MEXICO STATE UNIV LAS CRUCES DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
Personal Author(s) : Ludeman,Lonnie C
PDF Url : ADA114871
Report Date : 30 Apr 1982
Pagination or Media Count : 22
Abstract : The problem of optimum sampling strategies for spectral estimation of Fouriertype signals in the case of finite discretetime observations was investigated. In particular it was shown that minimum variance unbiased estimates of amplitudes of sine and cosine terms of Fourier signals embedded in additive zeromean white noise can be determined by sampling at the generalized Chebyshev times. The solution obtained, by putting the problem in an optimum linear regression framework, is that the generalized Chebyshev times are the zeros of the derivative of the highest frequency cosine wave. If the number of samples exceeds the intrinsic dimensionality, repeated independent sampling at those points not only provides the best approximation to the Fourier signal in a minimum variance sense but also the linear minimum variance unbiased estimate of the coefficients.
Descriptors : *Estimates, *Spectra, *Buoys, *Linear regression analysis, Roll, Control, Optimization, Sampling, Interpolation, Fourier series, Signals, Approximation(Mathematics)
Subject Categories : Statistics and Probability
Marine Engineering
Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE