Near field communications transmitter
US8908803B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Jun 28, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10158
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present application relates to a near field communications (NFC) transmitter (10) that is configured to modulate a carrier signal with a data signal using a quadrature modulator (12). A delay is introduced into the data signal, and this delayed version of the data signal is input to the input ports of the quadrature modulator (12). The resulting I and Q signals are combined to generate an output signal that is modulated in both amplitude and phase. An NFC receiver receiving the signal transmitted by the transmitter (10) is able to recover the data signal even when the amplitude of the received signal is greatly compressed, as the phase modulation of the transmitted signal is unaffected by the compression associated with power harvesting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.