Doppler navigation system with reference signal source diversity
US4063242A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S1/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Doppler Radio Navigation beacon with multi-element reference and main commutated arrays. The reference signal is programmed among the reference array elements irregularly to provide spatial diversity to the reference signal to eliminate or substantially reduce reference masking effects in certain multi-path situations (as observed at a remote receiving station such as on an aircraft on landing approach deriving angle information from said beacon). A similar irregular element excitation program is imposed on the normal array preserving coherence in the relative radiator movement (during commutation) between reference and main arrays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.