Data transmission method

A technology of data encoding and binary data, applied in the field of data encoding, can solve the problems of phase jump of the encoded waveform, no phase jump, etc., and achieve the effect of narrow spectrum and concentrated signal spectrum energy.

Active Publication Date: 2011-03-23
天津鲲鹏信息技术有限公司
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a data encoding method applied to the tag end in a passive RFID system, so that there is no phase jump between the encoded waveforms of two adjacent binary data after encoding, so as to solve the problem of adjacent encoding in the existing encoding method. There is a phase jump problem between the encoded waveforms of the two binary data

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Embodiment Construction

[0029] The encoding method of the present invention will be described in detail below with reference to the drawings and embodiments.

[0030] figure 1 It is a schematic diagram of binary data encoding baseband symbols according to a specific embodiment of the present invention, where the abscissa of each figure is the time axis, and the ordinate is the amplitude axis, (a) represents a high level S with no intermediate phase jumps 1 , (b) represents the falling edge S of the intermediate phase jump 2 , (c) represents the rising edge S of the intermediate phase jump 3 , (d) indicates the low level S with no jump in the middle phase 4 . The technical solution 1 provided by the present invention is to use binary data 0 with an S that does not jump in the middle phase 1 or S 4 encoding, binary data 1 with an intermediate phase jump of S 2 or S 3 Encoding; technical scheme 2 is to use the S of the intermediate phase jump of the binary data 0 2 or S 3 Encoding, binary data ...

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Abstract

The invention provides a data transmission method applied to a label end in a passive radio-frequency identification system, which has the technical scheme that codes with the same length are adopted for a binary datum 0 and a binary datum 1, in addition, the binary datum 0 is coded in a high-level or low-level coding mode without jumping at a middle phase, and the binary datum 1 is coded in a rising-edge or trailing-edge coding mode with jumping at a middle phase. Through the coding method provided by the invention, the phase jumping between coding waveforms of two adjacent binary data in the coding process can be avoided for solving the problem of phase jumping between the coding waveforms of the two adjacent binary data in the existing coding method.

Description

[0001] technical field [0002] The invention belongs to the technical field of radio frequency identification communication, and in particular relates to a data encoding method applied in a radio frequency identification system. Background technique [0003] Radio Frequency Identification (RFID) communication technology is a non-contact automatic identification technology; RFID system is mainly composed of tags, readers and computer network systems. The reader communicates with the tag through radio frequency signals, obtains the identification information stored on the tag, and at the same time manages and transmits the read tag information through the computer network system. [0004] RFID systems can be divided into two categories: passive RFID systems and active RFID systems, the main difference between the two is on the label side. The tags of passive RFID systems need to obtain energy from the radio frequency signal emitted by the reader, while the tags of active RFI...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00
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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