Method for transmitting data by radiofrequency link in a remote-reading apparatus
US9935801B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 23, 2014 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Dec 23, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for controlling digital data transmission in a remote-reading apparatus including a plurality of metering devices, each equipped with a radiofrequency module for communicating with a radiofrequency transmission/reception device of a gateway system of the apparatus, the method comprising a step of transmitting a digital signal from the radiofrequency module to the radiofrequency transmission/reception device and/or from the radiofrequency transmission/reception device to the radiofrequency module, the transmission being carried out via a carrier modulated by frequency shift modulation, the method being characterized in that the frequency shift modulation has a modulation index strictly equal to an integer value divided by two, and in that it includes a step of receiving the signal transmitted according to the modulation, comprising operations of generation of a synchronization signal synchronized with the received signal and synchronous detection of the received signal using the synchronization signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.