Modulation control through adaptive phase adjustment
US9997829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2016 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Sep 20, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A Near Field Communication (NFC) enabled device is disclosed. The NFC device includes an antenna. The NFC device also includes an impedance matching network, a carrier frequency generator to generate a carrier wave, a receiver for receiving a magnetic induction wave, a transmitter, a driver circuit configured to alter an impedance of an antenna network associated with the antenna between a first impedance and a second impedance and a control unit. The control unit is configured to derive a first phase difference between the received magnetic induction wave and an internal clock at the first impedance and a second phase difference between the received magnetic induction wave and the internal clock at the second impedance. The control unit is further configured to change a phase of the carrier wave based on a difference between the first phase difference and a second phase difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.