Spectral estimation utilizing an autocorrelation-based minimum free energy method
US4982150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Oct 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/9027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for rapidly estimating power spectral density components in the spectrum of an input signal, by digitizing the input signal over a selected time interval at a selected sample rate; and estimating an autocorrelation sequence for the digitized input signal before generating a solution b.sub.s.sup.0 to the autocorrelation sequence in a Yule-Walker equation by use of Levinson recursion. After generating a control parameter (temperature) .alpha., a non-linear MFE equation, ##EQU1## is solved with b.sub.s.sup.0 as an initial solution. Then, power spectral density components ##EQU2## are generated and recorded as estimates of the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.