Sliding DFT windowing techniques for monotonically decreasing spectral leakage
US8559568B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Dec 20, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/141
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided are methods and systems for digital signal processing by applying an improved SDFT technique for eliminating ripple in side lobes of a resulting spectrum. An exemplary method may comprise receiving an input signal which includes a number of discrete samples taken at regular time intervals. The input signal may then be filtered by a modified comb filter according to the sliding DFT technique to generate first and second filtered signals, the second filtered signal being filtered using a different filter coefficient. The first and second filtered signals may be processed by a first and second plurality of resonators respectively, according to the sliding DFT technique, to generate respective first and second SDFT output signals. The first and second SDFT output signals may then be selectively summed to generate a resulting output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.