RFID reader decoding method and decoding system

A decoding method and reader technology, applied in the field of wireless signal processing, can solve the problems of baseband signal deformation, noisy and useful signals cannot be distinguished, etc., to achieve the effect of improving accuracy and avoiding decoding failure

Active Publication Date: 2018-07-06
AEROSPACE INFORMATION
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Problems solved by technology

The RFID reader demodulates the modulated signal returned by the electronic tag into a baseband signal, and performs digital signal processing such as decoding on the baseband signal. However, because the application environment in the RFID field is relatively complex, the baseband signal often receives interference in the transmission path. However, deformation occurs, and in severe cases, even noise and useful signals cannot be distinguished

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  • RFID reader decoding method and decoding system
  • RFID reader decoding method and decoding system

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Embodiment Construction

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0015] RFID technology realizes the acquisition and identification of electronic tags through the signals reflected by electronic tags. RFID readers generally include antenna RF front-end, receiving link, digital baseband and other parts. The receiving link is the slave of the receiving antenna RF front-end. The modulated signal returned by the electronic tag is demodulated into a baseband signal and sent to the digital baseband for decoding. Since the baseband sig...

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Abstract

The embodiment of the invention provides an RFID reader decoding method. The method comprises the steps that when the deviation maximum or minimum of the level value of a sampling point exceeds a setthreshold, the sampling point is used as the level flip point of a baseband signal received by an RFID reader; the width of each pulse in the baseband signal is calculated by using the level flip point as a demarcation point; data bits contained in each pulse are determined according to the bit rate and the width; and according to the encoding method between the RFID reader and an electronic tag,the baseband signal is decoded. According to the decoding method, after the baseband signal is received by the RFID reader and before the baseband signal is decoded, the baseband signal is preprocessed; the influence of the baseband signal under interference on decoding is effectively eliminated; the problems of decoding failure caused by baseband signal distortion and the like are avoided; the baseband signal is correctly decoded; and the accuracy of identifying a target object is improved.

Description

technical field [0001] The invention relates to the technical field of wireless signal processing, in particular to a decoding method and a decoding system for an RFID reader-writer. Background technique [0002] The basic principle of RFID (Radio Frequency Identification, radio frequency identification) technology is to identify the target object and obtain relevant data by obtaining the signal reflected back from the passive target (such as an electronic tag), because of its long communication distance and fast reading and writing speed. It is widely used in warehouse management, anti-counterfeiting traceability, industrial manufacturing, logistics management and many other fields. The RFID reader demodulates the modulated signal returned by the electronic tag into a baseband signal, and performs digital signal processing such as decoding on the baseband signal. However, because the application environment in the RFID field is relatively complex, the baseband signal often ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10G06K17/00
CPCG06K7/10297G06K17/0003
Inventor 邓海万维逸宋平
Owner AEROSPACE INFORMATION
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