CN101989329B - Data encoding method applying in radio frequency identification system - Google Patents
Data encoding method applying in radio frequency identification system Download PDFInfo
- Publication number
- CN101989329B CN101989329B CN201010536164A CN201010536164A CN101989329B CN 101989329 B CN101989329 B CN 101989329B CN 201010536164 A CN201010536164 A CN 201010536164A CN 201010536164 A CN201010536164 A CN 201010536164A CN 101989329 B CN101989329 B CN 101989329B
- Authority
- CN
- China
- Prior art keywords
- binary data
- coding
- adopt
- encoded
- saltus step
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title abstract description 15
- 230000000630 rising effect Effects 0.000 claims abstract description 5
- 230000007704 transition Effects 0.000 abstract description 19
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 238000001228 spectrum Methods 0.000 description 11
- 230000011664 signaling Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
Images
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
本发明提供应用于无源射频识别系统中标签端的一种数据传输方法，技术方案是对二进制数据0和二进制数据1采用相同长度编码，并且二进制数据0用中间相位不跳变的高电平或低电平的编码方式编码，二进制数据1用中间相位跳变的上升沿或下降沿的编码方式编码。通过本发明提供的编码方法可以避免编码过程中相邻的两个二进制数据的编码波形之间的相位跳变，以解决现有编码方法中存在的相邻两个二进制数据的编码波形之间存在相位跳变的问题。
The invention provides a data transmission method applied to the tag end in a passive radio frequency identification system. The technical solution is to use the same length encoding for binary data 0 and binary data 1, and the binary data 0 uses a high level or high level with no intermediate phase jump. The low-level encoding method is used for encoding, and the binary data 1 is encoded by the rising or falling edge of the intermediate phase transition. The encoding method provided by the present invention can avoid the phase jump between the encoded waveforms of two adjacent binary data in the encoding process, so as to solve the problem existing between the encoded waveforms of two adjacent binary data in the existing encoding method. The problem of phase jumps.
Description
Technical field
The invention belongs to the RF identification communication technical field, be specifically related to a kind of data-encoding scheme that is applied in the radio-frequency recognition system.
Background technology
RF identification (Radio Frequency Identification, RFID) communication technology is a kind of non-contact automatic identification technology; Rfid system mainly is made up of label, read write line and computer network system.Read write line communicates through radiofrequency signal and label, obtains the identifying information of storing on the label, through computer network system the label information that reads is managed and information transmission simultaneously.
Rfid system can be divided into two types: passive RFID system and active RFID system, both key distinctions are in tab end.The labeling requirement of passive RFID system is obtained energy from the radiofrequency signal that the read write line emission comes, and the label of active RFID system self can provide energy.
In passive RFID system, the radio-frequency carrier signal of read write line utilization after coding and modulation sends to label, and label is modulated to backward scattered signal after answer signal is encoded, and sends to read write line then.In the RFID international standard, such as among the ISO 18000-6A/B/C, label is sending to data message the mode of encoding before the read write line normally FM0 or Miller coding.But have phase hit between the coding waveforms of latter two binary data of FM0 coding, jumping probability is 100%; Also have phase hit between the coding waveforms of latter two binary data 0 of Miller coding, jumping probability is 25%.Phase hit will cause spectrum energy to be revealed, and signal spectrum broadens.
Summary of the invention
Fundamental purpose of the present invention is; The data-encoding scheme that is applied to tab end in the passive RFID system is provided; There is not phase hit between the coding waveforms of two binary data that feasible coding back is adjacent, there to be the problem of phase hit between the coding waveforms that solves two adjacent in existing coding method binary data.
Technical scheme of the present invention is, a kind of data-encoding scheme is applied to the tab end of passive RFID system, it is characterized in that, comprises the steps:
Suppose S
1The high level of not saltus step of expression intermediate phase, S
2The negative edge of expression intermediate phase saltus step, S
3The rising edge of expression intermediate phase saltus step, S
4The low level of not saltus step of expression intermediate phase; And
If first bit of the sequence of armed binary data is 0, then adopt S
1Coding; If first bit of armed binary data sequence is 1, then adopt S
2Coding; And
If follow-up armed binary data is 0,
If adopt S before
1Encoded binary data 0 then adopt S
1Coding;
If adopt S before
4Encoded binary data 0 then adopt S
4Coding;
If adopt S before
2Encoded binary data 1 then adopt S
4Coding;
If adopt S before
3Encoded binary data 1 then adopt S
1Coding;
If follow-up armed binary data is 1,
If adopt S before
1Encoded binary data 0 then adopt S
2Coding;
If adopt S before
4Encoded binary data 0 then adopt S
3Coding;
If adopt S before
2Encoded binary data 1 then adopt S
3Coding;
If adopt S before
3Encoded binary data 1 then adopt S
2Coding.
Location swap with binary data in the technique scheme 0 and binary data 1 can form the new technical scheme that has same technique effect with technique scheme.
The invention has the beneficial effects as follows: adopted the coded system of continuous phase, having the probability of phase hit between the coding waveforms of feasible coding back binary data is 0%; Compare with FM0, Miller coding method, exist the probability of phase hit all to reduce by 100% and 100% between the coding waveforms of coding back binary data; Under the identical prerequisite of data rate, the signal spectrum energy is more concentrated, and frequency spectrum is narrower.
Description of drawings
Fig. 1 is the binary data coding baseband signalling synoptic diagram of an embodiment of the present invention;
The binary data coding state transition diagram that Fig. 2 provides for technical scheme 1 of the present invention;
Fig. 3 for binary data coding in a kind of embodiment of technical scheme 1 of the present invention after baseband signalling sequence synoptic diagram;
Fig. 4 is the baseband signalling sequence synoptic diagram of FM0 coding;
Fig. 5 is the baseband signalling sequence synoptic diagram of Miller coding;
Fig. 6 is the binary data coding base-band signal spectrum comparison diagram that three kinds of coding methods obtain.
Embodiment
To combine accompanying drawing and embodiment that coding method of the present invention is described in detail below.
Fig. 1 is the binary data coding baseband signalling synoptic diagram of an embodiment of the present invention, and the horizontal ordinate of wherein every width of cloth figure is a time shaft, and ordinate is an amplitude axis, (a) the high level S of not saltus step of expression intermediate phase
1, (b) the negative edge S of expression intermediate phase saltus step
2, (c) the rising edge S of expression intermediate phase saltus step
3, (d) the low level S of not saltus step of expression intermediate phase
4Technical scheme 1 provided by the invention is the S with binary data 0 not saltus step of usefulness intermediate phase
1Or S
4Coding, the S of binary data 1 usefulness intermediate phase saltus step
2Or S
3Coding; 2 of technical schemes are the S with binary data 0 usefulness intermediate phase saltus step
2Or S
3Coding, the S of binary data 1 not saltus step of usefulness intermediate phase
1Or S
4Coding.
The binary data coding state transition diagram that Fig. 2 provides for technical scheme 1 of the present invention, wherein:
If ◇ is the current S that is in
1State
When receiving binary data 0: state transitions is to S
1, thereby state transitions does not have phase hit;
When receiving binary data 1: state transitions is to S
2, thereby state transitions does not have phase hit.
If ◇ is the current S that is in
2State
When receiving binary data 0: state transitions is to S
4, thereby state transitions does not have phase hit;
When receiving binary data 1: state transitions is to S
3, thereby state transitions does not have phase hit.
If ◇ is the current S that is in
3State
When receiving binary data 0: state transitions is to S
1, thereby state transitions does not have phase hit;
When receiving binary data 1: state transitions is to S
2, thereby state transitions does not have phase hit.
If ◇ is the current S that is in
4State
When receiving binary data 0: state transitions is to S
4, thereby state transitions does not have phase hit;
When receiving binary data 1: state transitions is to S
3, thereby state transitions does not have phase hit.
Fig. 3 utilizes in a kind of embodiment of technical scheme 1 of the present invention baseband signalling sequence synoptic diagram behind the binary data coding, and wherein: binary data sequence 00 adopts S
1S
1Or S
4S
4Coding; Binary data sequence 01 adopts S
1S
2Or S
4S
3Coding; Binary data sequence 10 adopts S
2S
4Or S
3S
1Coding; Binary data sequence 11 adopts S
2S
3Or S
3S
2Coding.Obviously, (T constantly) do not have phase hit between the coding waveforms of two binary numbers, and jumping probability is 0%.
Fig. 4 is the baseband signalling sequence synoptic diagram of FM0 coding, and wherein: binary data sequence 00 adopts S
2S
2Or S
3S
3Coding; Binary data sequence 01 adopts S
2S
1Or S
3S
4Coding; Binary data sequence 10 adopts S
1S
3Or S
4S
2Coding; Binary data sequence 11 adopts S
1S
4Or S
4S
1Coding.Obviously, between the FM0 coding waveforms of two binary numbers (T constantly) necessarily to have phase hit, the probability of saltus step be 100%.
Fig. 5 is the baseband signalling sequence synoptic diagram of Miller coding, and wherein: binary data sequence 00 adopts S
1S
4Or S
4S
1Coding; Binary data sequence 01 adopts S
1S
2Or S
4S
3Coding; Binary data sequence 10 adopts S
2S
4Or S
3S
1Coding; Binary data sequence 11 adopts S
2S
3Or S
3S
2Coding.Obviously; After binary data sequence carried out Miller coding; Have only (T constantly) phase place generation saltus step between the coding waveforms of binary data sequence 00, other situation comprise that saltus step does not take place (T constantly) phase place between the coding waveforms of binary data sequence 01,10,11.So the probability of phase hit is 25% between the coding waveforms of Miller when coding binary data.
Fig. 6 is the binary data coding base-band signal spectrum comparison diagram that three kinds of coding methods obtain; Comprise digital coding base-band signal spectrum of the present invention 601, FM0 coded baseband signal frequency spectrum 602 and Miller coded baseband signal frequency spectrum 603; Wherein horizontal ordinate is a numerical frequency, and ordinate is a frequency spectrum normalization amplitude.Because with respect to FM0 and Miller coding, the coding waveforms of binary data does not have phase hit when using coding method of the present invention, so signal spectrum is narrower, energy is more concentrated.
Claims (2)
1. data-encoding scheme is applied to the tab end of passive RFID system, it is characterized in that, comprises the steps:
Suppose S
1The high level of not saltus step of expression intermediate phase, S
2The negative edge of expression intermediate phase saltus step, S
3The rising edge of expression intermediate phase saltus step, S
4The low level of not saltus step of expression intermediate phase; And
Binary data 0 and binary data 1 are adopted the equal length coding; And
If first bit of the sequence of armed binary data is 0, then adopt S
1Coding; If first bit of armed binary data sequence is 1, then adopt S
2Coding; And
If follow-up armed binary data is 0,
If adopt S before
1Encoded binary data 0 then adopt S
1Coding;
If adopt S before
4Encoded binary data 0 then adopt S
4Coding;
If adopt S before
2Encoded binary data 1 then adopt S
4Coding;
If adopt S before
3Encoded binary data 1 then adopt S
1Coding;
If follow-up armed binary data is 1,
If adopt S before
1Encoded binary data 0 then adopt S
2Coding;
If adopt S before
4Encoded binary data 0 then adopt S
3Coding;
If adopt S before
2Encoded binary data 1 then adopt S
3Coding;
If adopt S before
3Encoded binary data 1 then adopt S
2Coding.
2. data-encoding scheme is applied to the tab end of passive RFID system, it is characterized in that, comprises the steps:
Suppose S
1The high level of not saltus step of expression intermediate phase, S
2The negative edge of expression intermediate phase saltus step, S
3The rising edge of expression intermediate phase saltus step, S
4The low level of not saltus step of expression intermediate phase; And
Binary data 0 and binary data 1 are adopted the equal length coding; And
If first bit of the sequence of armed binary data is 1, then adopt S
1Coding; If first bit of armed binary data sequence is 0, then adopt S
2Coding; And
If follow-up armed binary data is 1,
If adopt S before
1Encoded binary data 1 then adopt S
1Coding;
If adopt S before
4Encoded binary data 1 then adopt S
4Coding;
If adopt S before
2Encoded binary data 0 then adopt S
4Coding;
If adopt S before
3Encoded binary data 0 then adopt S
1Coding;
If follow-up armed binary data is 0,
If adopt S before
1Encoded binary data 1 then adopt S
2Coding;
If adopt S before
4Encoded binary data 1 then adopt S
3Coding;
If adopt S before
2Encoded binary data 0 then adopt S
3Coding;
If adopt S before
3Encoded binary data 0 then adopt S
2Coding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010536164A CN101989329B (en) | 2010-11-09 | 2010-11-09 | Data encoding method applying in radio frequency identification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010536164A CN101989329B (en) | 2010-11-09 | 2010-11-09 | Data encoding method applying in radio frequency identification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101989329A CN101989329A (en) | 2011-03-23 |
| CN101989329B true CN101989329B (en) | 2012-10-10 |
Family
ID=43745860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010536164A Active CN101989329B (en) | 2010-11-09 | 2010-11-09 | Data encoding method applying in radio frequency identification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101989329B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221064A (en) * | 2014-10-21 | 2017-09-29 | 杭州追猎科技有限公司 | The coding method of the intelligent lock system communicated based on smart mobile phone vibration frequency |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946255B (en) * | 2012-10-17 | 2016-04-20 | 中国人民解放军国防科学技术大学 | For the code and decode method of passive radio frequency identification system |
| CN105553624B (en) * | 2015-12-31 | 2019-04-05 | 广西大学 | A kind of predictable data communication coding |
| CN109347605B (en) * | 2018-11-12 | 2021-06-04 | 北京和利时系统工程有限公司 | Encoding method, decoding method and device, and computer readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136052A (en) * | 2006-09-30 | 2008-03-05 | 中兴通讯股份有限公司 | Method for transmitting information from reader used for recognizing radio frequency to label |
| CN101616109A (en) * | 2008-06-27 | 2009-12-30 | 中兴通讯股份有限公司 | A kind of data transmission method |
| CN101620663A (en) * | 2008-07-02 | 2010-01-06 | 中兴通讯股份有限公司 | Data transmitting method |
-
2010
- 2010-11-09 CN CN201010536164A patent/CN101989329B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136052A (en) * | 2006-09-30 | 2008-03-05 | 中兴通讯股份有限公司 | Method for transmitting information from reader used for recognizing radio frequency to label |
| CN101616109A (en) * | 2008-06-27 | 2009-12-30 | 中兴通讯股份有限公司 | A kind of data transmission method |
| CN101620663A (en) * | 2008-07-02 | 2010-01-06 | 中兴通讯股份有限公司 | Data transmitting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221064A (en) * | 2014-10-21 | 2017-09-29 | 杭州追猎科技有限公司 | The coding method of the intelligent lock system communicated based on smart mobile phone vibration frequency |
| CN107221064B (en) * | 2014-10-21 | 2021-03-02 | 深圳移联翼通讯设备有限公司 | Coding method of intelligent lock system based on vibration frequency communication of intelligent mobile phone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101989329A (en) | 2011-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100182128A1 (en) | Tag identification method, tag anticollision method, rfid tag | |
| CN101989329B (en) | Data encoding method applying in radio frequency identification system | |
| CN209994396U (en) | Integrated circuit for decoding a data stream carried by a modulated signal | |
| CN101673195B (en) | Information transmission method, system and device in radio frequency identification | |
| JP5208281B2 (en) | Method for constructing physical layer in wireless communication based on magnetic field based low frequency band and computer-readable recording medium on which program for executing this method is recorded | |
| CN102185817B (en) | Method and device for transmitting information from reader-writer to label | |
| CN101620664A (en) | Method for transmitting data information from reader to label | |
| US20230107204A1 (en) | Communication method and device, and storage medium | |
| CN102129586B (en) | Information encoding method, method and device for transmitting information from reader-writer to label | |
| CN102006080A (en) | Data coding method for passive radio frequency identification system | |
| CN102129580B (en) | Data communication method from label to reader-writer based on Miller codes | |
| CN104331733A (en) | Ultrahigh-frequency RFID label and anti-interference method thereof | |
| CN106508105B (en) | For RF identification read write line to label information transferring method | |
| CN102682250B (en) | A kind of battery assist type RFID label chip signal reflex method | |
| CN102043936B (en) | Information transmission method and system in radio frequency identification system | |
| CN101136051A (en) | Method for transmitting information from reader used for recognizing radio frequency to label | |
| CN102055482B (en) | Data transmission method | |
| CN204595905U (en) | RFID tag, label recognizer, label reader | |
| CN101620663A (en) | Data transmitting method | |
| CN103455780A (en) | Article identification recognition method, device and system applicable to multiple applications | |
| WO2023056626A1 (en) | Uplink data sending method and apparatus of zero-power consumption terminal, device, and storage medium | |
| CN102946255B (en) | For the code and decode method of passive radio frequency identification system | |
| CN101136052A (en) | Method for transmitting information from reader used for recognizing radio frequency to label | |
| CN103226726A (en) | Novel semi-passive RFID label chip | |
| CN102682312A (en) | Data encoding method for passive radio frequency identification from reader-writer to tag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300459, No. 399, Xiang Xiang Road, Tanggu hi tech Zone, Tianjin Binhai New Area Patentee after: Tianjin Institute of advanced technology Address before: 300459, No. 399, Xiang Xiang Road, Tanggu hi tech Zone, Tianjin Binhai New Area Patentee before: TIANJIN BINHAI CIVIL-MILITARY INTEGRATED INNOVATION INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200604 Address after: 300459, No. 399, Xiang Xiang Road, Tanggu hi tech Zone, Tianjin Binhai New Area Patentee after: TIANJIN BINHAI CIVIL-MILITARY INTEGRATED INNOVATION INSTITUTE Address before: 410073 Hunan province Changsha Kaifu District, Deya Road No. 109 Patentee before: NATIONAL University OF DEFENSE TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201022 Address after: 8-9 / F, building 9, Xin'an venture Plaza, 399 Huixiang Road, Tanggu marine science and Technology Park, Binhai New Area, Tianjin 300459 Patentee after: Tianjin Kunpeng Information Technology Co.,Ltd. Address before: 300459, No. 399, Xiang Xiang Road, Tanggu hi tech Zone, Tianjin Binhai New Area Patentee before: Tianjin Institute of advanced technology |
|
| TR01 | Transfer of patent right |