RF meter reading system
US5451938A · kind A · utility
110Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1993 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Oct 22, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The RF meter reading system includes a transmitter having an encoder. Meter data is encoded and modulated using a bi-phase modulating scheme. In order to uniquely identify the start of a data transmission, a super start field, which is an "illegal" bi-phase signal is used. The super start field is selected such that it cannot be recognized if transmissions from more than one transmitter are being received by the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.