SMART CARD
First Claim
1. A smart card for communicating with a reader unit,the smart card comprising a digital signal processing receiver,characterized in that the digital signal processing receiver is arranged to determine the quality of a signal received from the reader unit by determining the error vector magnitude of said signalwherein the digital signal processing receiver is further arranged to reconfigure itself in dependence on the quality of said signal, in order to minimize its power consumption.
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Accused Products
Abstract
The invention proposes a smart card which comprises a digital signal processing receiver that can automatically identify the type of a smart card reader based on the error vector magnitude of signals received from the reader. The digital signal processing receiver is able to reconfigure itself at runtime in order to optimally minimize its power consumption in dependence on the type of reader it is communicating with. Furthermore, the invention proposes a new preamble structure that comprises a basic part and an optional additional part.
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Citations
7 Claims
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1. A smart card for communicating with a reader unit,
the smart card comprising a digital signal processing receiver, characterized in that the digital signal processing receiver is arranged to determine the quality of a signal received from the reader unit by determining the error vector magnitude of said signal wherein the digital signal processing receiver is further arranged to reconfigure itself in dependence on the quality of said signal, in order to minimize its power consumption.
Specification