Digitally programmable radio modules for navigation systems
US5909193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1995 |
| Grant date | Jun 1, 1999 |
| Priority date | — |
| Expiry date | Aug 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A programmable digital radio is configured to perform navigation functions. A receiver in the programmable digital radio receives analog signals from a navigation unit and digitizes the analog signals to produce digital navigation signals. The digital navigation signals are processed digitally and valid navigation information is determined. Processing includes generation of baseband signals including in-phase signals and quadrature signals, AM demodulation, filtering, decimating, demultiplexing, discrete fourier transformation, and function processing according to a selected function. The selected functions may include Localizer, Marker Beacon and Glideslope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.