VSAT frequency source using direct digital synthesizer
US5995812A · kind A · utility
21Cited by
21References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1995 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Sep 1, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18519
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A frequency generation device for a satellite communication system composed of a central hub station and a number of remote units. The remote units contain a single synthesizer located in an indoor unit. In this invention, the indoor-located synthesizer is a direct digital synthesizer which modulates the baseband signal and conveys the modulated signal to an outdoor unit for communication between the remote unit and the central hub. In the outdoor unit, the signal is converted directly by a fixed number to a Ku band frequency and transmitted to the central hub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.