TDMA system with a virtual reference
US5309439A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A TDMA system operates without the requirement for a reference burst. A station in the TDMA system monitors the bursts from other stations to determine the virtual reference. The virtual reference is then used as the basis, at the station, for transmitting its own burst. For carrier-based TDMA systems, the station can also determine a virtual carrier reference. This is implemented by measuring the received carrier from a plurality of bursts. The received carrier frequency of all of the bursts that have been received can then be averaged, and after correcting for frequency translation introduced by the transponder, the result can be employed as a virtual carrier reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.