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Method for recognizing radio frequency label based on ICA technique

A technology of radio frequency tags and identification methods, applied in the field of radio frequency tag identification, can solve problems such as system performance degradation and network congestion, and achieve obvious advantages.

Inactive Publication Date: 2008-10-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies all exist. When the capacity of the system increases, the performance of the system will drop rapidly, and sometimes even network congestion will occur.

Method used

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  • Method for recognizing radio frequency label based on ICA technique
  • Method for recognizing radio frequency label based on ICA technique
  • Method for recognizing radio frequency label based on ICA technique

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0020] specific implementation plan

[0021] see figure 2 , figure 2 It is a specific signal processing module block diagram of the tag end in the present invention. The data coming out of the ROM on the tag side is a binary baseband signal, which is multiplied by the DS-CDMA spread spectrum sequence PN, and the multiplied data is ASK modulated and sent out by the tag side antenna.

[0022] See 3, image 3 It is the data processing flow of the reader end in the present invention. After the antenna received from the reader is demodulated by ASK, the demodulated signal is up-sampled, and the sampling rate is consistent with the PN sequence rate. Then whiten the sampled data, and finally use ICA technology to separate the data of different tag ends.

[0023] see figure 1 , figure 1 It is a data processing flowchart of the present invention. On the method that the present invention carries out multi-tag detection based on DS-CDMA technology, in combination with Independe...

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PUM

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Abstract

The invention discloses a radio frequency label identification method based on the ICA technology, including the following steps: the reader transmits the inquiry request in the broadcasting way; after each label receives the inquiry order, the ID data information of the label is mixed with the DS-CDMA spread spectrum sequence PN to obtain the unique code order of the label; the mixed code order is processed with ASK modulation, then is transmitted to the reader; the reader processes the ASK modulation on the transmitted signal by the received label; the data sample x(n) is obtained to sample the demodulated ASK signal; a processed data z is obtained to whitening process the data sample x(n) by sampling to remove the second order pertinence; the recognizable radio frequency label signal is obtained using the ICA arithmetic to separate the signal. The flow chart of data processing of the invention does not divide the frequency and the time, thereby avoiding the data colliding problem brought by each user to snatch the channel.

Description

technical field [0001] The invention relates to a method for identifying a radio frequency tag, in particular to a method for identifying a radio frequency tag based on ICA technology. Background technique [0002] RFID (Radio Frequency Identification) is a non-contact automatic identification technology realized by radio frequency technology. It takes wireless communication technology and large-scale integrated circuit technology as the core, uses radio frequency signals and their spatial coupling and transmission characteristics to realize automatic identification of stationary or moving targets, and efficiently obtains target information data. Through the combination with Internet and other technologies, it can Realize the tracking of targets and the sharing of information on a global scale. As a basic technology with a large quantity and a wide range, RFID technology will completely change human production and lifestyle, and is considered to be one of the most promising...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
Inventor 袁莉芬何怡刚侯周国邓晓李兵肖迎群唐志军谢涛
Owner HUNAN UNIV