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Decoding method of miller code and rfid reader

A decoding method and encoding technology, which are applied in the direction of instruments, multi-frequency code systems, and devices dedicated to receivers, etc., can solve the problems of out-of-band interference signals of filters, inability to decode digital signals, and difficulties in clock synchronization, etc., and achieve the solution of confusion The effect of jamming

Active Publication Date: 2021-06-29
华大恒芯科技有限公司
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Problems solved by technology

This causes difficulties in clock synchronization and increases the difficulty of decoding
[0006] During the transmission process, the signal will be distorted and abnormally jumped due to circuit or channel interference, etc., which will cause the signal duty cycle to shift, the normal signal will be mixed with interference signals, and even some out-of-band interference signals that cannot be filtered out by the filter will appear. , burrs, etc.
This increases the difficulty of decoding, resulting in a decrease in the decoding rate and recognition rate, and it is impossible to decode the digital signal output by the channel by judging the signal width and other methods

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  • Decoding method of miller code and rfid reader
  • Decoding method of miller code and rfid reader
  • Decoding method of miller code and rfid reader

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[0035] Several technical features and advantageous details of the disclosure are explained more fully with reference to the non-limiting embodiments illustrated in the drawings and detailed in the following description. Also, the following description omits descriptions of well-known raw materials, processing techniques, components, and equipment so as not to unnecessarily obscure the technical gist of the present disclosure. However, those skilled in the art will understand that, in describing the embodiments of the present disclosure hereinafter, the description and specific examples are given by way of illustration only and not limitation.

[0036] Wherever possible, the same numbers will be used throughout the drawings to refer to the same or like parts. In addition, although the terms used in the present disclosure are selected from well-known and commonly used terms, some terms mentioned in the specification of the present disclosure may be selected by the discloser at h...

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Abstract

The present invention provides a Miller coded decoding method and an RFID reader, wherein the method includes the following steps: generating a Miller coded sequence template according to the link frequency; searching for a preamble in the input Miller coded sequence; calibrating through the preamble The coding sequence template is made to conform to the actual input link frequency; the input Miller coding sequence is matched with the coding sequence template to complete data decoding. By adopting the decoding method of the invention, the problems of interfering signals and burrs mixed in normal signals are solved, and the efficiency of data decoding is improved.

Description

technical field [0001] The present invention relates to the technical field of Radio Frequency Identification (RFID, Radio Frequency Identification), in particular to a Miller code decoding method and an RFID reader. Background technique [0002] RFID is a non-contact automatic identification technology: the reader uses radio frequency signals to automatically identify electronic tags and exchange information with electronic tags. At present, RFID technology is one of the key technologies of the Internet of Things and has broad application prospects. [0003] In order to make the signal more suitable for channel transmission, it is usually necessary to encode the baseband signal during transmission. Both ISO18000-6C (EPC C1 GEN2) and GB / T29768 protocols stipulate that FM0 and Miller coding can be used as the coding method of the reverse link, and the coefficient M selected by Miller coding can be 2, 4 and 8. According to the ISO18000-6C (EPC C1 GEN2) and GB / T29768 agreemen...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/00G06K7/10
CPCG06K7/10009H04L1/0036H04L27/2692
Inventor 马纪丰季叶庆边海波
Owner 华大恒芯科技有限公司