Frame synchronization method in radio-frequency identification

A radio frequency identification system and frame synchronization technology, applied in the field of radio frequency identification communication, can solve the problems of low reliability and reliability of judgment information codes, poor performance of frame synchronization methods, etc. The effect of interference and improved reliability

Active Publication Date: 2013-03-06
天津鲲鹏信息技术有限公司
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a frame synchronization method in a radio frequency identification system, including a frame synchronization code design and a frame synchronization judgment mechanism, to solve the poor performance of the existing frame synchronization method, the reliability of the starting time of the judgment information code and the The problem of low reliability

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  • Frame synchronization method in radio-frequency identification
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Embodiment Construction

[0033] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but this does not constitute a limitation of the present invention.

[0034] In the specific implementation manner of the present invention, the process of forming the frame synchronization code at the transmitting end, refer to figure 1 The flow chart shown includes the following steps:

[0035] Connect n (n>1) frame synchronization subcodes with good autocorrelation performance to form a frame synchronization code. Without loss of generality, we take n=2 as an example. In the frame synchronization code designed in this specific embodiment, the frame synchronization subcode C 1 Using Barker code 10110111000 with length L=11, frame synchronization subcode C 2 Using C 1 The opposite polarity sequence of C 2 =-C 1 . The final frame synchronization code is 10110111000 01001000111, and its waveform is as follows Figure 5 shown.

[0036] ...

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Abstract

The invention provides a frame synchronization method in a radio-frequency identification system, which comprises frame synchronization code design and a frame synchronization judgment mechanism. The method concretely comprises the following steps of: adopting binary sequence codes with good self relevance performance at an emitting end to be used as frame synchronization sub codes; then, sequentially connecting a plurality of frame synchronization sub codes for forming frame synchronization codes of the radio-frequency identification system; and judging the starting moment of information codes through forming a judgment sequence at a receiving end. The interference of the signal channel random noise is inhabited and the reliability of the frame synchronization results can be improved through the definite position relationship of a plurality of peak values of the invention based on the relevant calculation results.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification communication, and in particular relates to a frame synchronization method in radio frequency identification. Background technique [0002] Radio Frequency Identification (RFID) system is a non-contact automatic identification system. RFID systems include readers and tags. The reader communicates with the tag through radio frequency signals, and obtains the identification information stored on the tag, and then performs various operations on the tag. The reader can identify tags moving at high speed, and can identify multiple tags at the same time, which is quick and convenient to operate. [0003] In radio frequency identification communication, communication information is transmitted in the form of frame signals. Such as figure 2 As shown, the frame signal includes a frame synchronization code 101 and an information code 102, wherein the frame synchronization code is ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26
Inventor 李建成任天鹏王宏义庄钊文唐朝京许拔
Owner 天津鲲鹏信息技术有限公司
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