Methods and apparatus for RFID tag communications
US8855169B2 · kind B2 · utility
16Cited by
48References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Sep 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0022
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides backscatter interrogators, communication systems and backscatter communication methods. According to one aspect of the present invention, a backscatter interrogator includes a data path configured to communicate a data signal; a signal generator configured to generate a carrier signal; and a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and amplitude modulate the carrier signal using the spread data signal, the modulator being further configured to phase modulate the carrier signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.