Method for synchronzing user signal transmissions within a hybrid communication network
US8290432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2007 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Feb 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/0045
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is devoted to synchronizing the transmission of user signals within a single-frequency hybrid network comprising at least one transmission satellite (SAT) and regenerative emitters (E1-E6) tasked with retransmitting received user signals to user terminals (T1, T2), using the same frequency and the same waveform. This method consists of temporally shifting, with respect to a time marker (TM) corresponding to the moment when a chosen element of the user signals arrives at a terrestrial reference arc (RA) from said satellite (SAT), the moment when the user signals received by each emitter (E1-E6) are retransmitted, by a local duration which is a function of the respective positions of the emitter and the satellite (SAT) with respect to a chosen reference position (RP) on said arc (RA), so that the same user signals retransmitted by the satellite (SAT) and the emitter (Ei) reach a user terminal (T1, T2) at roughly the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.