Signal processing method and RFID reader

A signal processing and reader-writer technology, applied in the field of radio frequency identification, can solve the problems of high-amplitude modulation depth, poor PR-ASK modulation signal quality, and large hardware overhead, so as to reduce signal bandwidth occupation, improve modulation quality, The effect of reducing hardware overhead

Active Publication Date: 2018-03-30
RUIJIE NETWORKS CO LTD
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AI Technical Summary

Problems solved by technology

One is to realize the PR-ASK modulation signal through the analog circuit mixer, the amplitude of the PR-ASK modulation signal generated by this method passes through zero, has a high amplitude modulation depth, and the quality of the PR-ASK modulation signal is not good
Another method is to generate PR-ASK modulation signals by splicing waveform templates. The PR-ASK ...

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  • Signal processing method and RFID reader
  • Signal processing method and RFID reader
  • Signal processing method and RFID reader

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Embodiment Construction

[0023] The signal processing method and the RFID reader / writer provided by the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] The term "and / or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations.

[0025] The terms "first" and "second" in the description and drawings of the present invention are used to distinguish different objects, or to distinguish different processes for the same object, rather than to describe a specific sequence of objects. For example, the first indication information and the second indication information are used to distinguish different indication information, rather than describing a specific order of the indication information.

[0026] In addition, the terms "inclu...

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Abstract

The invention provides a signal processing method and an RFID reader, relates to the field of radio frequency identification in the Internet of things, and can realize generation of PR-ASK radio frequency signals which conform to the ISO/IEC 18000-6C standard and are ideal in signal quality on the basis of reducing the hardware overhead as far as possible. The signal processing method comprises the steps of receiving a binary original data stream sent by a controller; performing pulse interval encoding (PIE) on the original data stream to obtain a PIE encoded data stream; performing duobinaryencoding on the PIE encoded data stream to obtain a duobinary encoded data stream; performing n-times data interpolation on the duobinary encoded data stream, performing filtering through raised cosine roll-off modeling filter to obtain a first modulation signal; performing waveform adjustment on the first modulation signal by using a cosine waveform template to obtain a second modulation signal;and enabling the second modulation signal to pass through a mixer to obtain a phase reversal amplitude shift keying (PR-ASK) radio frequency signal.

Description

technical field [0001] The present invention relates to the field of radio frequency identification in the Internet of Things, in particular to a signal processing method and a radio frequency identification (Radio Frequency Identification, RFID) reader. Background technique [0002] Radio Frequency Identification (RFID) technology uses electromagnetic waves for wireless communication. It can identify specific targets and read and write related data through radio signals without the need to establish mechanical or optical contact between the identification system and specific targets. The RFID system includes a radio frequency tag and an RFID reader, using electromagnetic waves to make the radio frequency tag automatically recognized by the RFID reader within a certain distance. The biggest advantage of the RFID system is that the identification process does not require manual intervention, it can complete multi-objective remote automatic management, the data transmission is...

Claims

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Application Information

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IPC IPC(8): G06K7/10G06K17/00
CPCG06K7/10297G06K17/00
Inventor 林坤林淦斌
Owner RUIJIE NETWORKS CO LTD
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