Systems and methods for photonically assisted RF filtering
US8472806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2008 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jan 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and methods for improved photonically-assisted RF filtering. Presently, processing of wide-band RF signals involves the use of multiple specialized equipment to isolate a region of interest from the spectrum. The present invention discloses the use of a modulation system to upconvert the RF signal onto the sideband of a light source such as a laser, an optical filter sub-system comprising a plurality of filtering units that function as combinations of IIR and FIR filters, and a resonant channelizing filter for noise reduction and rejection of undesired channels, and means for control and agility of a piecewise coherent optical filter. The resulting filtered RF signal may then be downconverted to the electrical domain for further signal processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.