Multiple-window method for obtaining improved spectrograms of signals
US6351729B1 · kind B1 · utility
7Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1999 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jul 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed a method for processing a time-varying signal to produce a high-resolution spectrogram that represents power as a function of both frequency and time. Data blocks of a time series, which represents of a sampled signal, are subjected to processing which results in a sequence of frequency-dependent functions referred to as eigencoefficients. Each eigencoefficient represents signal information projected onto a local frequency domain using a respective one of K Slepian sequences or Slepian functions. The spectrogram is derived from time- and frequency-dependent expansions formed from the eigencoefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.