Transceiver supporting multiple modulation schemes
US9071289B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2012 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Jul 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/80
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present application relates to a transceiver for use in a communications system that uses magnetic field induction to transmit data, the transceiver having an amplifier for driving an antenna, the amplifier forming, with a capacitance and a resistance connected in parallel with the antenna, a parallel resonant circuit. The resistance value of the resistance is adjustable, to permit adjustment of the loaded quality factor of the parallel resonant circuit. The transceiver includes a processing unit configured to determine the signal to noise ratio (SNR) of a signal received by the transceiver, and based on this SNR select a modulation scheme to apply to a data signal to be transmitted by the transceiver. The value of the resistance is adjusted to a level at which the loaded quality factor of the parallel resonant circuit is able to support the bandwidth and data rate required by the selected modulation scheme.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.