Wideband-to-narrowband conversion method and apparatus
US6445647B1 · kind B1 · utility
0Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1999 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Aug 24, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wideband-to-narrowband conversion method and apparatus performs the operational step of receiving an acoustic wideband signal, initially incident on an array of acoustic wideband transducers and subsequently digitized, and in response thereto generating a spatial Wigner bilinear kernel output signal, and the operational step of receiving and spatially bandpass filtering the spatial Wigner bilinear kernel output signal to remove a wideband low frequency portion as well as any unwanted noise therefrom and retain and output only a narrowband portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.