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
CN107862228AActive Publication Date: 2018-03-30RUIJIE NETWORKS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
RUIJIE NETWORKS CO LTD
Publication Date
2018-03-30

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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.
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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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