Invention Application
US20160087681A1 Method for a Contactless Communication Between Two NFC Devices with Impact Reduction of an External Noise Emission 有权
两个NFC设备之间的非接触式通信的方法,具有减少外部噪声发射的影响

  • Patent Title: Method for a Contactless Communication Between Two NFC Devices with Impact Reduction of an External Noise Emission
  • Patent Title (中): 两个NFC设备之间的非接触式通信的方法,具有减少外部噪声发射的影响
  • Application No.: US14860188
    Application Date: 2015-09-21
  • Publication No.: US20160087681A1
    Publication Date: 2016-03-24
  • Inventor: Achraf Dhayni
  • Applicant: STMicroelectronics International N.V
  • Priority: FR1458904 20140922
  • Main IPC: H04B5/00
  • IPC: H04B5/00 H04L27/08 H04B15/02
Method for a Contactless Communication Between Two NFC Devices with Impact Reduction of an External Noise Emission
Abstract:
A system can be used for contactless communication of information between a first device and a second device, each having an antenna intended to be coupled via a near magnetic field. The first device includes a transmit chain having first circuitry configured to generate a digital data stream corresponding to the information to be transmitted, and second circuitry configured to generate a first amplitude-modulated and dithered signal in the antenna of the first device from this stream and from an application of a first dithering. The second device includes a receive chain having third circuitry configured to carry out a frequency transposition of a second amplitude-modulated and dithered signal originating from the first signal, with application of a second dithering synchronous with the first dithering.
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