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Decoding method and device for RFID reader-writer

A decoding method and decoding device technology, applied in the field of digital signal processing, can solve the problems of high bit error rate of RFID reader-writer, rapid conversion of strong signals, etc.

Active Publication Date: 2020-06-19
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a decoding method and device for an RFID reader, which solves the problem of high bit error rate of the RFID reader in the prior art in a low signal-to-noise ratio environment, overcomes the problem of RFID reader The rapid change of strong signal caused by the relative movement of the writer and the electronic tag

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  • Decoding method and device for RFID reader-writer
  • Decoding method and device for RFID reader-writer
  • Decoding method and device for RFID reader-writer

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Embodiment Construction

[0034] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0035] figure 1 It is a schematic flowchart of a decoding method for an RFID reader-writer provided by an embodiment of the present invention. The embodiment of the present invention is applicable to the decoding of FMO, miller2, miller4, miller8 encoding type data. like figure 1 As shown, the method includes the following steps:

[0036] Step 110, receiving a return signal from the electronic tag.

[0037] In the embodiment of the present invention, for passive RFID, when the RFID reader transmits microwave signals to the electronic tag, the electronic tag obtains energy thro...

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Abstract

The embodiment of the invention provides a decoding method and device for an RFID reader-writer, belongs to the technical field of digital signal processing, and solves the problem of high bit error rate of the RFID reader-writer in a low signal-to-noise ratio environment in the prior art. The method comprises the following steps: receiving a return signal of an electronic tag; obtaining an in-phase signal and a quadrature signal from the return signal at a preset sampling frequency, the preset sampling frequency being a preset multiple of the return frequency of the return signal; obtaining acomplex signal corresponding to the return signal according to the data phases of the in-phase signal and the orthogonal signal; determining to-be-decoded data and an actual oversampling number in the complex signal according to the return frequency, the preset sampling frequency, the preset frequency deviation range and the coding type of the return signal; and determining a decoding result corresponding to the to-be-decoded data in the related period corresponding to the actual oversampling number according to the coding type of the return signal and the actual oversampling number. The embodiment of the invention is suitable for the decoding process of the RFID reader-writer.

Description

technical field [0001] The invention relates to the technical field of digital signal processing, in particular to a decoding method and device for an RFID reader-writer. Background technique [0002] RFID (Radio Frequency Identification) technology is a wireless communication technology widely used in logistics, asset management, and anti-counterfeiting of items. One of the core technologies of RFID technology is decoding technology. [0003] The RFID reader / writer performs decoding after receiving the input signal of the electronic tag. In the prior art, the input signal to be decoded is not clearly defined. The input signal includes in-phase signal and quadrature signal. When the distance between the RFID reader and the electronic tag changes, the strong signal will change rapidly between the in-phase and quadrature signals. When the RFID reader When the processing speed cannot keep up with the conversion speed of strong signals, bit errors will occur in demodulation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10H04L1/00H03M1/12
CPCG06K7/10009G06K7/10198H03M1/1245H04L1/0036
Inventor 王于波李德建唐晓柯陈家国马岩张喆冯曦
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY