CN110110563A - A kind of implementation method of RFID modulates baseband signals depth - Google Patents
A kind of implementation method of RFID modulates baseband signals depth Download PDFInfo
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- CN110110563A CN110110563A CN201910192262.5A CN201910192262A CN110110563A CN 110110563 A CN110110563 A CN 110110563A CN 201910192262 A CN201910192262 A CN 201910192262A CN 110110563 A CN110110563 A CN 110110563A
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- rfid
- high speed
- switch tube
- speed switch
- input terminal
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
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- General Health & Medical Sciences (AREA)
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Abstract
It is disclosed by the invention to belong to electroporation field, specially a kind of implementation method of RFID modulates baseband signals depth, the implementation method of this kind of RFID modulates baseband signals depth is specific steps are as follows: S1: initial connection: the output end of MUC microcontroller is electrically connected by the input terminal of conducting wire and high speed switch tube, the intracavity bottom of MUC microcontroller is fixedly installed with digital analog converter, carry out an electrical measurement, continue 5min, S2: filtering connection: the output end of high speed switch tube is electrically connected by the input terminal of conducting wire and bandpass filter, carry out secondary electrical measurement, continue 5min, the implementation method of this kind of RFID modulates baseband signals depth, user is without in the case where changing circuit and RFID reader, the modulation depth of baseband signal can easily be adjusted, and it can fit With in different application distance and different performance electronic tag, in addition circuit composition is simple, and at low cost, economic and practical is strong.
Description
Technical field
The present invention relates to electroporation field, specially a kind of implementation method of RFID modulates baseband signals depth.
Background technique
RFID is actually a kind of new technology for reaching identification electronic tag using twireless radio-frequency communication technology, therefore it can
Just can identify the electronic tag of storing substance information without contact.There are the technology numerous other automatic identification technologies not have
The advantages of, than as can identification movement in object, can identify the characteristics such as a large amount of labels, high reliablity, good confidentiality simultaneously, this
Make it one of the key technology of Internet of Things.
RFID system is mainly by card reader, electronic tag and the most of composition of computer network 3.Wherein electronic tag stores
The relevant information of identified article, be the carrier of information in RFID system, the information that it is stored can be read by reader
Or write-in.Reader is the equipment for being read using radio-frequency technique or electronic labeling information being written.Label information can pass through calculating
Machine and network system are managed to be transmitted with information.
At present at home, uhf band RFID is ISO18000-6C and ISO18000-6B agreement using most agreements.It penetrates
Will lead to electronic tag when the modulation depth very little of frequency signal can not demodulate, and will lead to energy deficiency when modulation depth is excessive, because
This modulation depth should be adjusted according to different occasions and different lot labels.Many readers are using complicated circuit knot
Structure realizes the requirement of modulation depth, not only increases cost, and reduce reliability.
Summary of the invention
The purpose of the present invention is to provide a kind of implementation methods of RFID modulates baseband signals depth, to solve above-mentioned background
Will lead to electronic tag when the modulation depth very little of the radiofrequency signal proposed in technology can not demodulate, and can lead when modulation depth is excessive
Enable amount is insufficient, therefore modulation depth should be adjusted according to different occasions and different lot labels.Many readers are adopted
The requirement that modulation depth is realized with complicated circuit structure, the problem of not only increasing cost, and reduce reliability.
To achieve the above object, the invention provides the following technical scheme: a kind of realization of RFID modulates baseband signals depth
Method, the implementation method of this kind of RFID modulates baseband signals depth specific steps are as follows:
S1: initial connection: the output end of MUC microcontroller is electrically connected by the input terminal of conducting wire and high speed switch tube
It connects, the intracavity bottom of MUC microcontroller is fixedly installed with digital analog converter, carries out an electrical measurement, continues 5min；
S2: filtering connection: the output end of high speed switch tube is electrically connected by the input terminal of conducting wire and bandpass filter,
Secondary electrical measurement is carried out, 5min is continued；
S3: peripheral hardware connection: the both ends of high speed switch tube are connected separately with the first transistor and second transistor, inclined to be formed
Voltage is set, the baseband signal for passing through high speed switch tube forms the waveform with biasing；
S4: be coupled: the output end of the first transistor and second transistor all passes through the input terminal of conducting wire and bandpass filter
It is electrically connected；
S5: modulation: several orthogonal sub-channels are broken a channel into, high-speed data signal is converted into parallel low speed subdata
Stream, is modulated to and is transmitted on each of the sub-channels, input terminal and the first transistor and second transistor phase of high speed switch tube
Even；
S6: frequency modulation: the instantaneous angular frequency ω and modulated signal instantaneous value of carrier wave are linear, and amplitude UC is constant, single
When frequency modulation, the expression of instantaneous angular frequency ω is:
ω=ω C+ Jian ω cos Ω t；
Jian ω=kf Ua in formula, constant directly proportional to modulated signal amplitude Ua are maximum angular frequency deviation；
S7: protocol processor, including digital signal processor and memory processing and storage: are served as using baseband processing circuitry
Unit, complete the encoding and decoding of base band, acoustic coding also with voice coding task.
Compared with prior art, the beneficial effects of the present invention are: user is without the case where changing circuit and RFID reader
Under, the modulation depth of baseband signal can be very easily adjusted, and different applications distances and different performance can be applicable in
In electronic tag, in addition circuit composition is simple, and at low cost, economic and practical is strong.
Detailed description of the invention
Fig. 1 is electrical block diagram of the present invention；
Fig. 2 is output waveform contrast schematic diagram before and after base band signal process of the present invention；
In figure: 100MUC microcontroller, 110 digital analog converters, 200 high speed switch tubes, 210 the first transistors, 220 second
Transistor, 300 bandpass filters.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of implementation method of RFID modulates baseband signals depth, the convenient modulation for adjusting baseband signal
Depth is applicable in the electronic tag of different applications distances and different performance, referring to Fig. 1, a kind of RFID modulates baseband signals
The implementation method of depth, including MUC microcontroller 100, high speed switch tube 200 and bandpass filter 300；
Referring to Fig. 1, MUC microcontroller 100 has digital analog converter 110, specifically, MUC microcontroller 100
Intracavity bottom has been bolted to connection digital analog converter 110, and digital analog converter 110 can be continuous analog-signal transitions
Discrete digital signal；
Referring to Fig. 1, high speed switch tube 200 has the first transistor 210 and second transistor 220, specifically, high
The top and bottom of fast switching tube 200 are electrically connected by conducting wire with the input terminal of the first transistor 210 and second transistor 220
It connects, when baseband signal is low level, the input terminal of high speed switch tube 220 is connected by second transistor 220 with low level end,
When baseband signal is high level, the input terminal of high speed switch tube 220 is connected by the first transistor 210 with high level end；
Referring to Fig. 1, the input terminal and high speed switch tube 200 of bandpass filter 300 are fixedly mounted, specifically, band
The input terminal of bandpass filter 300 passes through the output of conducting wire and high speed switch tube 200, the first transistor 210 and second transistor 220
End is electrically connected；
Referring to Fig. 1, the implementation method of this kind of RFID modulates baseband signals depth specific steps are as follows:
S1: the output end of MUC microcontroller 100 initial connection: is passed through into the input terminal of conducting wire and high speed switch tube 200 electricity
Property connection, the intracavity bottom of MUC microcontroller 100 is fixedly installed with digital analog converter 110, carries out an electrical measurement, continues 5min；
S2: the output end of high speed switch tube 200 filtering connection: is passed through into the input terminal of conducting wire and bandpass filter 300 electricity
Property connection, carry out secondary electrical measurement, continue 5min；
S3: peripheral hardware connection: the both ends of high speed switch tube 200 are connected separately with the first transistor 210 and second transistor
220, to form bias voltage, the baseband signal for passing through high speed switch tube 200 forms the waveform with biasing；
S4: be coupled: the output end of the first transistor 210 and second transistor 220 all passes through conducting wire and bandpass filter 300
Input terminal be electrically connected；
S5: modulation: several orthogonal sub-channels are broken a channel into, high-speed data signal is converted into parallel low speed subdata
Stream, is modulated to and is transmitted on each of the sub-channels, the input terminal and the first transistor 210 of high speed switch tube 200 and the second crystalline substance
Body pipe 220 is connected；
S6: frequency modulation: the instantaneous angular frequency ω and modulated signal instantaneous value of carrier wave are linear, and amplitude UC is constant, single
When frequency modulation, the expression of instantaneous angular frequency ω is:
ω=ω C+ Jian ω cos Ω t；
Jian ω=kf Ua in formula, constant directly proportional to modulated signal amplitude Ua are maximum angular frequency deviation；
S7: protocol processor, including digital signal processor and memory processing and storage: are served as using baseband processing circuitry
Unit completes encoding and decoding, acoustic coding and the voice coding task of base band.
In summary, the implementation method of this kind of RFID modulates baseband signals depth, is applied to 860MHz-960MHz-
In signal modulation circuit in UHF-RFID reader chip emission link, is mainly realized, specifically included by high speed switch tube 200
MUC microcontroller 100, high speed switch tube 200 and bandpass filter 300, the digital analog converter 110 built in MUC microcontroller 100
Output end connection high speed switch tube 200 input terminal, high speed switch tube 200 output end connection bandpass filter 300 it is defeated
Enter end, the both ends of high speed switch tube 200 connect bias voltage respectively, and the baseband signal for passing through high speed switch tube 200 forms band
The waveform of biasing, user is without can very easily adjust the tune of baseband signal in the case where changing circuit and RFID reader
Depth processed, and can be applicable in the electronic tag of different applications distances and different performance, in addition circuit composition is simple, cost
Low, economic and practical is strong.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (1)
1. a kind of implementation method of RFID modulates baseband signals depth, it is characterised in that: this kind of RFID modulates baseband signals depth
Implementation method specific steps are as follows:
S1: the output end of MUC microcontroller (100) initial connection: is passed through into conducting wire and the input terminal of high speed switch tube (200) electricity
Property connection, the intracavity bottom of MUC microcontroller (100) is fixedly installed with digital analog converter (110), carries out an electrical measurement, continues
5min；
S2: the output end of high speed switch tube (200) filtering connection: is passed through into conducting wire and the input terminal of bandpass filter (300) electricity
Property connection, carry out secondary electrical measurement, continue 5min；
S3: peripheral hardware connection: the both ends of high speed switch tube (200) are connected separately with the first transistor (210) and second transistor
(220), to form bias voltage, the baseband signal for passing through high speed switch tube (200) forms the waveform with biasing；
S4: be coupled: the output end of the first transistor (210) and second transistor (220) all passes through conducting wire and bandpass filter
(300) input terminal is electrically connected；
S5: modulation: breaking a channel into several orthogonal sub-channels, high-speed data signal be converted into parallel low speed sub-data flow,
It is modulated to and is transmitted on each of the sub-channels, the input terminal of high speed switch tube (200) and the first transistor (210) and the second crystalline substance
Body pipe (220) is connected；
S6: frequency modulation: the instantaneous angular frequency ω and modulated signal instantaneous value of carrier wave are linear, and amplitude UC is constant, single-tone
When processed, the expression of instantaneous angular frequency ω is:
ω=ω C+ Jian ω cos Ω t；
Jian ω=kf Ua in formula, constant directly proportional to modulated signal amplitude Ua are maximum angular frequency deviation；
S7: protocol processor, including digital signal processor and interior deposit receipt processing and storage: are served as using baseband processing circuitry
Member completes encoding and decoding, acoustic coding and the voice coding task of base band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192262.5A CN110110563B (en) | 2019-03-14 | 2019-03-14 | Method for realizing modulation depth of RFID baseband signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192262.5A CN110110563B (en) | 2019-03-14 | 2019-03-14 | Method for realizing modulation depth of RFID baseband signal |
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| CN110110563A true CN110110563A (en) | 2019-08-09 |
| CN110110563B CN110110563B (en) | 2022-06-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080030336A1 (en) * | 2006-08-01 | 2008-02-07 | Takefumi Endo | Semiconductor integrated circuit device and receiving device |
| CN203242007U (en) * | 2013-04-27 | 2013-10-16 | 成都九洲电子信息系统股份有限公司 | Ultrahigh frequency RFID reader baseband signal processing and modulator circuit |
| CN104715276A (en) * | 2015-03-30 | 2015-06-17 | 江苏物联网研究发展中心 | Modulation depth variable RFID signal generating device |
| CN105322813A (en) * | 2014-07-04 | 2016-02-10 | 恩智浦有限公司 | Voltage converter |
| CN107579743A (en) * | 2017-10-13 | 2018-01-12 | 深圳市华士精成科技有限公司 | A kind of ultrahigh frequency radio frequency identification (RFID) reader radiating circuit |
-
2019
- 2019-03-14 CN CN201910192262.5A patent/CN110110563B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080030336A1 (en) * | 2006-08-01 | 2008-02-07 | Takefumi Endo | Semiconductor integrated circuit device and receiving device |
| CN203242007U (en) * | 2013-04-27 | 2013-10-16 | 成都九洲电子信息系统股份有限公司 | Ultrahigh frequency RFID reader baseband signal processing and modulator circuit |
| CN105322813A (en) * | 2014-07-04 | 2016-02-10 | 恩智浦有限公司 | Voltage converter |
| CN104715276A (en) * | 2015-03-30 | 2015-06-17 | 江苏物联网研究发展中心 | Modulation depth variable RFID signal generating device |
| CN107579743A (en) * | 2017-10-13 | 2018-01-12 | 深圳市华士精成科技有限公司 | A kind of ultrahigh frequency radio frequency identification (RFID) reader radiating circuit |
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| Publication number | Publication date |
|---|---|
| CN110110563B (en) | 2022-06-07 |
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