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Information transmission method, system and device in radio frequency identification

An information transmission system, radio frequency identification technology, used in instruments, inductive record carriers, computing, etc.

Active Publication Date: 2012-06-13
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In view of this, the main purpose of the present invention is to provide an information transmission method, system and device in radio frequency identification, to solve the autocorrelation of existing frame synchronization code technology Poor performance, not suitable for judging the starting time of data

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  • Information transmission method, system and device in radio frequency identification
  • Information transmission method, system and device in radio frequency identification
  • Information transmission method, system and device in radio frequency identification

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Embodiment Construction

[0044] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0045] In order to solve the defect that the existing frame synchronization code technology has poor autocorrelation performance and is not suitable for judging the starting time of data, the present invention provides an information transmission method in radio frequency identification, the core idea of ​​which is: the reader will need to send The data information is coded and modulated to form a modulated signal, and the modulated signal is sent to the tag; the code adopts Energy Enhanced Code (EEC, Energy Enhanced Code), and the frame format of the modulated signal includes frame synchronization code, frame synchronization code The number of high and low levels is different, and the code word of the frame synchronization code contains three consecutive high levels with the same polarity; after the tag receives, dem...

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Abstract

The invention discloses an information transmission method in radio frequency identification, comprising the following steps: a reader encodes and modulates the data information to be transmitted to form a modulation signal and transmits the modulation signal to a label, wherein the frame format of the modulation signal comprises a frame synchronous code comprising 10 binary codes in which the polarities are V1, V1, V2, V2, V2, V1, V2, V2, V1, and V2, sequentially, wherein V1 represents low level and V2 represents high level; therefore, the frame synchronous code forms the following levels: low, low, high, high, high, low, high, high, low, and high. The invention discloses an information transmission system in radio frequency identification, thereby solving the problem of poor auto correlation in the existing frame synchronous code technology which is not suitable for judging data start time.

Description

Technical field [0001] The invention involves radio frequency recognition technology in wireless communication, especially in information transmission methods, systems and devices in radio frequency recognition. Background technique [0002] Radio Frequency Identify is a non -contact automatic recognition technology that automatically recognizes the target object through RF signal and obtains relevant data. The identification operation does not require manual intervention, which can work in various harsh environments.The RFID system includes readers and labels (or answers). The reader can identify the label of high -speed movement, and can recognize multiple labels at the same time, which is fast and convenient to operate. [0003] Radio frequency recognition is divided into passive radio frequency recognition and active radio frequency recognition. The essence of the two is the label side.The label of passive radio frequency recognition is to obtain energy from the waveform emit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/00
CPCG06K7/0008G06K7/10297
Inventor 刘朝阳张建杜江
Owner ZTE CORP
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