Phase-control system for telecommunications signals received by an adaptive antenna
US4847860A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1986 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2652
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a receiving station having an adaptive receiving antenna, a phasing system comprises a plurality of reception paths receiving telecommunications signals derived from the same useful signal combined in transmission with a disturbing signal having a frequency band outside the frequency band of the useful signal, via a plurality of primary sources of the receiving antenna. The phasing system includes a narrowband filtering circuit for filtering the overall telecommunications signal in one of the reception paths to derive a reference signal undisturbed by the disturbing signal and solely dependent on the useful signal. In phasing circuits respectively assigned to the reception paths, the useful signal alone is set to a phase as close as possible to the phase of the reference signal in order to obtain, after signal summing at outputs of the phasing circuits, a maximum power using signal mixed with an attenuated scrambling signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.