System and method for distinguishing active and passive NFC devices based on carrier frequency adjustment

A near field communication (NFC) reader detects whether an NFC device is a passive NFC device or an active NFC device. The NFC reader outputs an interrogation signal and a carrier signal. When the NFC reader receives a response signal from the NFC device in response to the interrogation signal, the...

Full description

Saved in:
Bibliographic Details
Main Authors WU GANG, XIONG TIANHAO
Format Patent
LanguageChinese
English
Published 29.08.2023
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
Online AccessGet full text

Cover

More Information
Summary:A near field communication (NFC) reader detects whether an NFC device is a passive NFC device or an active NFC device. The NFC reader outputs an interrogation signal and a carrier signal. When the NFC reader receives a response signal from the NFC device in response to the interrogation signal, the NFC reader adjusts the frequency of the carrier signal before the response signal ends. The NFC reader determines whether the NFC device is a passive NFC device or an active NFC device based on a characteristic of the remainder of the response signal. 一种近场通信(NFC)读取器检测NFC设备是无源NFC设备或有源NFC设备。NFC读取器输出询问信号和载波信号。当NFC读取器响应于询问信号而从NFC设备接收到响应信号时，NFC读取器在响应信号结束之前调节载波信号的频率。NFC读取器基于响应信号的剩余部分的特性来确定NFC设备是无源NFC设备或有源NFC设备。
Bibliography:Application Number: CN202080108138