CN109547040A - A kind of anti-tampering signal delivery method - Google Patents
A kind of anti-tampering signal delivery method Download PDFInfo
- Publication number
- CN109547040A CN109547040A CN201811348430.7A CN201811348430A CN109547040A CN 109547040 A CN109547040 A CN 109547040A CN 201811348430 A CN201811348430 A CN 201811348430A CN 109547040 A CN109547040 A CN 109547040A
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- signal
- frequency
- tampering
- module
- acquisition module
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Noise Elimination (AREA)
- Networks Using Active Elements (AREA)
Abstract
The invention discloses a kind of anti-tampering signal delivery methods, include the following steps: S1: digital signal processing chip proposes forward emitted phaselocked loop local oscillator by transmission line and sends transmitting signal, the transmitting phaselocked loop local oscillator acquires transmitting signal by acquisition module, obtain stable transmitting signal, acquisition module filters out AC influence using low-pass input filter, and then uses indemnifying measure for direct current series mode interference；S2: the pre-amplifying module of acquisition module be there is high input impedance, the differential amplifier circuit of high cmrr complete electric signal smooth input and common-mode noise elimination, and the amplification to transmitting signal；Acquisition module of the present invention filters out AC influence using low-pass input filter, and then uses indemnifying measure for direct current series mode interference；The pre-amplifying module of acquisition module be there is high input impedance, the differential amplifier circuit of high cmrr complete electric signal smooth input and common-mode noise elimination.
Description
Technical field
The present invention relates to anti-tampering signal delivery method technical field, specially a kind of anti-tampering signal delivery method.
Background technique
Present whole set equipment has merged more and more electronic and electrical equipments, in complicated space environment, each electronics
It will be interfered with each other when equipment transmitting and reception signal and measuring signal is interfered, lead to itself job failure or exception.
Summary of the invention
It is mentioned above in the background art to solve the purpose of the present invention is to provide a kind of anti-tampering signal delivery method
Problem.
To achieve the above object, the invention provides the following technical scheme: a kind of anti-tampering signal delivery method, including it is as follows
Step:
S1: digital signal processing chip proposes forward emitted phaselocked loop local oscillator by transmission line and sends transmitting signal, the transmitting lock
Phase ring local oscillator acquires transmitting signal by acquisition module, obtains stable transmitting signal, and acquisition module uses low pass input filter
Device filters out AC influence, and then uses indemnifying measure for direct current series mode interference；
S2: the pre-amplifying module of acquisition module is that there is the differential amplifier circuit of high input impedance, high cmrr to complete
The elimination of the smooth input and common-mode noise of electric signal, and the amplification to transmitting signal；
S3: the intermediate-freuqncy signal that the stable transmitting signal and fixed intermediate frequency oscillator generate is mixed by the first frequency mixer
Frequently, the mixed frequency signal is then received by anti-tampering module, then is filtered among acquisition first using the first bandpass filter
Signal；
S4: first M signal emits through transceiver module as pumping signal, while control module receives anti-do via transmission line
Disturb the returned signal of module；
S5: the response signal that transceiver module receiving sensor is passed back, meanwhile, the digital signal processing chip is converted via A/D
Device sends reference signal to phaselocked loop local oscillator is received；
S6: response signal is via main amplifying circuit, second level amplifying circuit, 30Hz low-pass filter circuit and level adjustment circuit
Between grade between high pass separate at different levels flip-flop and obtain amplified first M signal, using the second bandpass filter pair
The response signal, which is filtered, obtains filtered response signal；
S7: amplified first M signal and the reference signal carry out mixing through the second frequency mixer and obtain letter among second
Number, it receives intermediate-frequency filter and the second M signal is filtered, obtain filtered second M signal；
S8: the low frequency signal that third frequency mixer sends the filtered second M signal and the second local oscillator of reception mixes
Third M signal is obtained after frequency, and is conveyed.
Preferably, the transmission line uses conductive fabric, what netted braided wire wrapped up signal wire.
Preferably, the emission signal frequency is higher or lower than reference signal frequency.
Preferably, the frequency of the first M signal is consistent with the frequency of the reference signal.
Preferably, the low-pass filter has RC network, LC network, any one in twin-T network.
Preferably, when spike type series mode interference becomes main interference source in step S5, system is of less demanding to sampling rate
When, the influence of series mode interference can be weakened using dual slope integrating formula A/D converter.
Compared with prior art, the beneficial effects of the present invention are: acquisition module of the present invention is filtered using low-pass input filter
Except AC influence, and indemnifying measure is then used for direct current series mode interference；
The pre-amplifying module of acquisition module is that there is the differential amplifier circuit of high input impedance, high cmrr to complete telecommunications
Number smooth input and common-mode noise elimination, and the amplification to transmitting signal；
Response signal is via between main amplifying circuit, second level amplifying circuit, 30Hz low-pass filter circuit and level adjustment circuit
Grade between high pass separate at different levels flip-flop and obtain amplified first M signal, remove the influence of flip-flop pair.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
A kind of anti-tampering signal delivery method, includes the following steps:
S1: digital signal processing chip proposes forward emitted phaselocked loop local oscillator by transmission line and sends transmitting signal, the transmitting lock
Phase ring local oscillator acquires transmitting signal by acquisition module, obtains stable transmitting signal, EEG acquisition module is using low pass input filter
Wave device filters out AC influence, and then uses indemnifying measure for direct current series mode interference；
S2: the pre-amplifying module of acquisition module is that there is the differential amplifier circuit of high input impedance, high cmrr to complete
The elimination of the smooth input and common-mode noise of electric signal, and the amplification to transmitting signal；
S3: the intermediate-freuqncy signal that the stable transmitting signal and fixed intermediate frequency oscillator generate is mixed by the first frequency mixer
Frequently, the mixed frequency signal is then received by anti-tampering module, then is filtered among acquisition first using the first bandpass filter
Signal；
S4: first M signal emits through transceiver module as pumping signal, while control module receives anti-do via transmission line
Disturb the returned signal of module；
S5: the response signal that transceiver module receiving sensor is passed back, meanwhile, the digital signal processing chip is converted via A/D
Device sends reference signal to phaselocked loop local oscillator is received；
S6: response signal is via main amplifying circuit, second level amplifying circuit, 30Hz low-pass filter circuit and level adjustment circuit
Between grade between high pass separate at different levels flip-flop and obtain amplified first M signal, using the second bandpass filter pair
The response signal, which is filtered, obtains filtered response signal；
S7: amplified first M signal and the reference signal carry out mixing through the second frequency mixer and obtain letter among second
Number, it receives intermediate-frequency filter and the second M signal is filtered, obtain filtered second M signal；
S8: the low frequency signal that third frequency mixer sends the filtered second M signal and the second local oscillator of reception mixes
Third M signal is obtained after frequency, and is conveyed.
Specifically, the transmission line uses conductive fabric, what netted braided wire wrapped up signal wire.
Specifically, the emission signal frequency is higher or lower than reference signal frequency.
Specifically, the frequency of the first M signal is consistent with the frequency of the reference signal.
Specifically, the low-pass filter has RC network, LC network, any one in twin-T network.
Specifically, system is of less demanding to sampling rate when spike type series mode interference becomes main interference source in step S5
When, the influence of series mode interference can be weakened using dual slope integrating formula A/D converter.
The transmission line uses conductive fabric, what netted braided wire wrapped up signal wire；There is conductor outside transmission line
The conducting wire of package is shielding line, and shielded layer, shielded layer needs to be grounded the conductor of package, and external interference signal can be led by the layer
Enter the earth, avoids interference signal from entering inner conductor interference while reducing the loss of transmission signal.
Acquisition module of the present invention filters out AC influence using low-pass input filter, and direct current series mode interference is then used
Indemnifying measure；
The pre-amplifying module of acquisition module is that there is the differential amplifier circuit of high input impedance, high cmrr to complete telecommunications
Number smooth input and common-mode noise elimination, and the amplification to transmitting signal；
Response signal is via between main amplifying circuit, second level amplifying circuit, 30Hz low-pass filter circuit and level adjustment circuit
Grade between high pass separate at different levels flip-flop and obtain amplified first M signal, remove the influence of flip-flop pair.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of anti-tampering signal delivery method, which comprises the steps of:
S1: digital signal processing chip proposes forward emitted phaselocked loop local oscillator by transmission line and sends transmitting signal, the transmitting lock
Phase ring local oscillator acquires transmitting signal by acquisition module, obtains stable transmitting signal, and acquisition module uses low pass input filter
Device filters out AC influence, and then uses indemnifying measure for direct current series mode interference；
S2: the pre-amplifying module of acquisition module is that there is the differential amplifier circuit of high input impedance, high cmrr to complete
The elimination of the smooth input and common-mode noise of electric signal, and the amplification to transmitting signal；
S3: the intermediate-freuqncy signal that the stable transmitting signal and fixed intermediate frequency oscillator generate is mixed by the first frequency mixer
Frequently, the mixed frequency signal is then received by anti-tampering module, then is filtered among acquisition first using the first bandpass filter
Signal；
S4: first M signal emits through transceiver module as pumping signal, while control module receives anti-do via transmission line
Disturb the returned signal of module；
S5: the response signal that transceiver module receiving sensor is passed back, meanwhile, the digital signal processing chip is converted via A/D
Device sends reference signal to phaselocked loop local oscillator is received；
S6: response signal is via main amplifying circuit, second level amplifying circuit, 30Hz low-pass filter circuit and level adjustment circuit
Between grade between high pass separate at different levels flip-flop and obtain amplified first M signal, using the second bandpass filter pair
The response signal, which is filtered, obtains filtered response signal；
S7: amplified first M signal and the reference signal carry out mixing through the second frequency mixer and obtain letter among second
Number, it receives intermediate-frequency filter and the second M signal is filtered, obtain filtered second M signal；
S8: the low frequency signal that third frequency mixer sends the filtered second M signal and the second local oscillator of reception mixes
Third M signal is obtained after frequency, and is conveyed.
2. a kind of anti-tampering signal delivery method according to claim 1, it is characterised in that: the transmission line uses conductive
Cloth, what netted braided wire wrapped up signal wire.
3. a kind of anti-tampering signal delivery method according to claim 1, it is characterised in that: the emission signal frequency is high
In or lower than reference signal frequency.
4. a kind of anti-tampering signal delivery method according to claim 1, it is characterised in that: the first M signal
Frequency is consistent with the frequency of the reference signal.
5. a kind of anti-tampering signal delivery method according to claim 1, it is characterised in that: the low-pass filter has RC
Network, LC network, any one in twin-T network.
6. a kind of anti-tampering signal delivery method according to claim 1, it is characterised in that: when spike type string in step S5
Mould interference becomes main interference source, when system is of less demanding to sampling rate, can be cut using dual slope integrating formula A/D converter
The influence of weak series mode interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348430.7A CN109547040B (en) | 2018-11-13 | 2018-11-13 | Anti-interference signal conveying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348430.7A CN109547040B (en) | 2018-11-13 | 2018-11-13 | Anti-interference signal conveying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109547040A true CN109547040A (en) | 2019-03-29 |
| CN109547040B CN109547040B (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811348430.7A Expired - Fee Related CN109547040B (en) | 2018-11-13 | 2018-11-13 | Anti-interference signal conveying method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116797476A (en) * | 2021-06-29 | 2023-09-22 | 南京诺源医疗器械有限公司 | Medical optical imaging noise elimination method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064800A (en) * | 2010-11-24 | 2011-05-18 | 成都纽斯达电子有限责任公司 | Method for automatically realizing tuning of electronic tuning radio |
| CN103391047A (en) * | 2013-07-12 | 2013-11-13 | 成都林海电子有限责任公司 | 1.2GHz-bandwidth L-waveband down converter and down converter achieving method |
| CN103916148A (en) * | 2013-01-05 | 2014-07-09 | 华为技术有限公司 | Self-adaption radio frequency interference offsetting device, method and receiver |
| CN106301516A (en) * | 2016-08-08 | 2017-01-04 | 华为技术有限公司 | A kind of diversity receiver and terminal |
-
2018
- 2018-11-13 CN CN201811348430.7A patent/CN109547040B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064800A (en) * | 2010-11-24 | 2011-05-18 | 成都纽斯达电子有限责任公司 | Method for automatically realizing tuning of electronic tuning radio |
| CN103916148A (en) * | 2013-01-05 | 2014-07-09 | 华为技术有限公司 | Self-adaption radio frequency interference offsetting device, method and receiver |
| CN103391047A (en) * | 2013-07-12 | 2013-11-13 | 成都林海电子有限责任公司 | 1.2GHz-bandwidth L-waveband down converter and down converter achieving method |
| CN106301516A (en) * | 2016-08-08 | 2017-01-04 | 华为技术有限公司 | A kind of diversity receiver and terminal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116797476A (en) * | 2021-06-29 | 2023-09-22 | 南京诺源医疗器械有限公司 | Medical optical imaging noise elimination method |
| CN116797476B (en) * | 2021-06-29 | 2024-06-04 | 南京诺源医疗器械有限公司 | Medical optical imaging noise elimination method |
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| CN109547040B (en) | 2021-01-26 |
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