Spectral estimation utilizing a minimum free energy method with

Details Spectral estimation utilizing a minimum free energy method with Spectral estimation utilizing a minimum free energy method with

1989-10-30

1991-11-26

Wieder, Kenneth

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 77D, 364485, 342192, G01R 2316

Patent

active

050685970

ABSTRACT:
A method for rapidly estimating power spectral density components .rho.(f) in the spectrum of an input signal, by first digitizing the input signal over a selected time interval at a selected sample rate; computing an m-th order prediction error energy as an arithmetic mean of forward and backward prediction error energies; and then computing an m-th order prediction error power from a previous reflection coefficient .GAMMA. computation. A control parameter .alpha. is generated; using .alpha. and .GAMMA., an m-th order entropy H and free energy F are then computed, from which is computed m-th order reflection coefficients as extremes of the m-th order Free energy. If the proper extremes are not found, new feedback for the (m+1)-st order solution is generated. If the proper extremes are found, the spectral components are computed and recorded.

REFERENCES:
patent: 3124745 (1964-03-01), Schroeder
patent: 3937899 (1976-02-01), Denenberg
patent: 3983379 (1976-09-01), Scott
patent: 4782523 (1988-11-01), Galand

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