Initial acquisition of synchronization for a station in a TDMA satellite communication network
US4346470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Mar 21, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/2126
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are disclosed for acquiring transmit synchronization at a secondary station with the periodic frame reference bursts from a reference station in a TDMA network in an improved manner to enable the use of full power initial acquisition bursts while also reducing the bandwidth required to complete the initial acquisition operation. During the first phase, the apparatus at the secondary station bursts an initial acquisition burst during a relatively wide interval in the traffic portion of a TDMA frame and measures a propagation delay factor. The apparatus then adds the propagation delay factor to the receive frame timing synchronized with the reception of the frame reference bursts at the secondary station to obtain a more accurate adjusted transmit frame timing. The more accurate frame timing is then employed in a second phase to burst a transmit reference burst from the secondary station during a relatively narrower interval in the control portion of periodic, non-consecutive ones of the TDMA frames and the apparatus measures a propagation delay correction factor. The propagation delay correction factor is then used to adjust the phase of the transmit frame tim…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.