Very High Data Rate contactless air interface: An innovative solution for card to reader link

This paper presents an innovative Very High Data Rate contactless interface for communication from card to reader. The aim of this interface is to provide up to 10 Mbit/s bitrates to fulfill requirements of tomorrow's contactless applications enhancing the transfer rate - as well as the data amount - by more than an order of magnitude. The innovation described in this paper is an extension of the sub-carrier concept legacy to a more generic pattern description. This method, commonly used in standard wireless communication systems, is here adapted to contactless. This concept allows increasing datarates without losing spectral efficiency. This new breakthrough enables the VHDR systems to reach bitrates up to 6.8 Mbit/s with an improved reliability. This interface has been validated with prototype cards and reader prototypes at 13.56 MHz.