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Apparatus and method for direct radio frequency (RF) sampling in near field communication (NFC) devices

A near-field communication and sampling rate technology, applied in wireless communication, near-field transmission systems, read/write/interrogation/recognition near-field transmission systems, etc. adoption, etc.

Active Publication Date: 2017-08-18
HISILICON (SHANGHAI) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it is expected Figure 1A The architecture has the following disadvantages: high complexity of the analog front end before sampling the RF signal; requires in-phase and quadrature-phase clock generation; the overall area of ​​the analog and digital silicon area is large; baseband processing
[0007] However, it is expected Figure 1B The architecture has the following disadvantages: limited receiver sensitivity; signals with low modulation index can cause problems; noisy compared to other architectures; only amplitude demodulation may be used and there may be NFC communication vulnerability issues

Method used

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  • Apparatus and method for direct radio frequency (RF) sampling in near field communication (NFC) devices
  • Apparatus and method for direct radio frequency (RF) sampling in near field communication (NFC) devices
  • Apparatus and method for direct radio frequency (RF) sampling in near field communication (NFC) devices

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Embodiment Construction

[0065] In the following description, numerous specific details are set forth in order to provide a thorough understanding of various embodiments of the invention. However, it will be understood by those skilled in the art that embodiments of the invention may be practiced without some or all of these specific details. It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0066] In the drawings, the same reference numerals refer to the same or similar functionality or features throughout the several views. It will be appreciated that the functional blocks shown in the different figures do not necessarily represent components of a physical implementation of the NFC receiver architecture, but rather functions performed by the NFC receiver architecture. In fact, each functional block may be implemented by one or more discrete components or elements or a combi...

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Abstract

Embodiments of the invention provide a system and method for direct RF sampling a Near Field Communication (NFC) receiver at a rate higher than the carrier frequency by reducing and shifting requirements at a front end analog module to a digital module.

Description

technical field [0001] Embodiments of the present invention relate to a near field communication (near field communication, NFC) receiver architecture capable of direct radio frequency (radio frequency, RF) sampling. Background technique [0002] Near field communication (near field communication, NFC) enables two devices to perform short-distance communication without contact, and usually requires a connection to be initiated within a short-range distance of 4cm or less. NFC connections are much faster than other communication technologies such as Bluetooth or Wi-Fi. Users only need to bring two NFC-enabled devices within reading range to automatically transfer data between the two devices. NFC applications include, but are not limited to, credit card payments, ticketing, content sharing, and quick pairing. [0003] An NFC-enabled device can act as an NFC reader or NFC card or tag that uses a carrier frequency of 13.56 MHz to modulate information bits. In a typical NFC r...

Claims

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Application Information

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IPC IPC(8): H04W4/00H04B5/00H04W4/80
CPCH04W4/80H04B5/77G06K7/10237H04B1/16H04L25/061H04L27/0014H04L2027/0026
Inventor 哈里亚·维卡沙纳余展于锐杨腾智徐长青陈雪松
Owner HISILICON (SHANGHAI) TECH CO LTD