CN109525356A - It is a kind of to cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming - Google Patents
It is a kind of to cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming Download PDFInfo
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- CN109525356A CN109525356A CN201811140031.1A CN201811140031A CN109525356A CN 109525356 A CN109525356 A CN 109525356A CN 201811140031 A CN201811140031 A CN 201811140031A CN 109525356 A CN109525356 A CN 109525356A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 241000209202 Bromus secalinus Species 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 7
- 230000002085 persistent effect Effects 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036039 immunity Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- RZTAMFZIAATZDJ-UHFFFAOYSA-N felodipine Chemical group CCOC(=O)C1=C(C)NC(C)=C(C(=O)OC)C1C1=CC=CC(Cl)=C1Cl RZTAMFZIAATZDJ-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/20—Countermeasures against jamming
- H04K3/22—Countermeasures against jamming including jamming detection and monitoring
- H04K3/224—Countermeasures against jamming including jamming detection and monitoring with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/46—Jamming having variable characteristics characterized in that the jamming signal is produced by retransmitting a received signal, after delay or processing
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Pinball Game Machines (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
It cheats at one's exam the management-control method of radio signal the invention discloses a kind of for strong vulnerability to jamming, it is intercepted and captured first using cheating signal of the receiving device to appearance, cheating signal is recorded completely, the cheating signal of recording contains the means for anti-interference such as communication mode, coding mode, cipher mode that cheating side uses, and the cheating of recording is emitted as former state and just can be good at the strong feature of reply cheating equipment vulnerability to jamming.Emitted the cheating signal persistent loop that will be recorded or when signal of practising fraud occurs again by way of transmitting a period of time, so that it may realize effective compacting to cheating signal.
Description
Technical field
The present invention relates to the radio control technical fields in wireless communication system, are directed to strong anti-interference more particularly to one kind
Property cheats at one's exam the management-control method of radio signal.
Background technique
With scientific and technological progress, development, more and more lawbreakers are taken an exam cheating using the mode of radio communication, sternly
Justice, the fairness for affecting all kinds of examinations of country again, will cause very bad social influence.And from airborne electromagnetic wave order
From the point of view of supervising angle, the band limits that will use that generally cheats at one's exam is wider, and transmitting station equipment is " three nothings " product, emits function
Rate is larger, it is easy to interfere to all kinds of normal radio communication services.Therefore the social danger that radio cheats at one's exam
Property is larger.
Suppressing the usual manner for the radio signal that cheats at one's exam at present is that press device is arranged within the scope of examination hall, works as hair
After some present frequency point has cheating signal to occur, the frequency point transmitting using press device in cheating signal is higher than cheating signal power
Throttle signal (this throttle signal is generally the opposite cheating meaningless signal of information such as single-tone carrier wave, white noise) so that
Receiving device can not be properly received cheating signal, to achieve the purpose that suppress the signal that cheats at one's exam.But with radio communication skill
The development of art has the equipment that much cheats at one's exam to use the communication mode (spread spectrum, coding techniques etc.) of strong vulnerability to jamming.Often
When the pressing mode of rule copes with this kind of cheating signal, if expectation reaches preferable pressing result, it is necessary to which transmission power is cheating
10-100 times (hectowatt-kilowatt rank) or more of signal transmitting plant capacity.But the nearlyr model of press device in actual use
Staff or student are had in enclosing, adverse effect can be caused to human health using big transmission power, while high-power
Transmitting equipment volume it is opposite can be bigger, portability reduces, and in general effect is bad in practical application.Therefore, one can
The method for coping with this kind of strong vulnerability to jamming cheating radio signal just seems necessary.
Summary of the invention
In order to overcome existing technological deficiency, the present invention, which provides one kind, can overcome conventional drawing method in reply high interference immunity
Property cheat at one's exam radio signal when inefficient cheat at one's exam the management-control method of radio signal with insufficient for strong vulnerability to jamming.
Technical solution of the present invention is as described below:
It is a kind of to cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, which comprises the following steps:
(1) acquisition of cheating signal: the frequency range for easily occurring cheating signal for target is monitored, when there is cheating signal to occur
It receives to get off cheating signal acquisition using monitoring, sample rate 51.2MHz, data bit width 16bit, and it is stored as data text
Part；
(2) practise fraud signal analysis: by it is collected cheating signal foundation characteristic reference record get off, and with number collected
According to one-to-one correspondence；
(3) control to cheating signal: when there is or it is expected to carry out continuing to certain frequency again compacting in signal of practising fraud, foundation
The strategy of control emits collected cheating signal by management and control devices, realizes the control to cheating signal.
According to the present invention of above scheme, in step (1), the mode using triggering is that the template triggering of pre-stored mechanism is adopted
Collection.
Comparing general template triggering collection mode, " signal power just starts acquisition (when system has response after being higher than template
Between, a part of information when cheating signal just starts to occur can be omitted) ", pre-stored mechanism used in the present invention can be delayed always
Deposit the acquisition data of a period of time.When practise fraud signal triggering collection after, the data of caching can also be preserved together, it will be able to
Completely cheating signal is preserved.
According to the present invention of above scheme, in step (2), the foundation characteristic parameter of the cheating signal collected includes
Centre frequency, bandwidth, power, duration, discovery time.
According to the present invention of above scheme, in step (3), when carrying out control compacting, cheating collected is used
Signal is suppressed.
The pressing result of control throttle signal thus can be effectively avoided to be inhibited by strong vulnerability to jamming cheating communication system, into
And make system to strong vulnerability to jamming cheat at one's exam radio signal also have well control compacting.
The present invention is a kind of to cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, is to utilize software wireless telecommunications
Number processing technique, exploitation, one of design have extensive adaptability, examined convenient for what is realized in general radio monitoring control equipment
Study disadvantage radio signal management-control method.Cheating signal integrity is collected using the receiving device of high sampling rate, works as needs
When being managed to the throttle signal occurred again or needing to carry out certain frequency point to continue interference, emit the cheating letter of recording
Number, using the strong correlation for recording cheating signal and its reception device of practising fraud, so that cheating reception device can receive always control
The repetition interference information of equipment transmitting, so can not it is correct, normally receive cheating information, realize lasting compacting, complete to highly resistance
Immunity cheats at one's exam effective control of radio signal.
Detailed description of the invention
Fig. 1 is the whole implementation process block diagram of the embodiment of the present invention；
Fig. 2 is the template acquisition and cheating signal triggering implementation flow chart of the embodiment of the present invention；
Fig. 3 is the implementation flow chart of the data pre-cache mechanism of the embodiment of the present invention.
Specific embodiment
It is with reference to the accompanying drawing and real for the purpose of the present invention, technical solution and technology beneficial effect is more clearly understood
Mode is applied, the present invention is described in further detail and is illustrated.Here, exemplary embodiment of the invention and its illustrating to use
It is of the invention but not as a limitation of the invention in explaining.
The present invention is a kind of to cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, specifically comprises the following steps:
As shown in Figure 1,
Step 101: the frequency under the normal condition for cheating signal frequency range easily occur spectrum mask acquisition: is acquired using receiving device
It composes, the frequency range spectrogram under this normal condition will be used as and use in the next steps referring to template.
Step 102: waiting cheating signal: constantly carrying out the normal frequency range template of real-time frequency range spectrogram and acquisition pair
According to, when signal of practising fraud occurs, on frequency spectrum can with it is normal when have more apparent difference.Work can be locked first by the difference on frequency spectrum
Then the Frequency point of disadvantage signal searches for whether the Frequency point acquired cheating signal in 2 hours in the database, if adopted
Collected, jump procedure 104 continues process, if do not acquired, jump procedure 103 continues process.
Step 103: the triggering collection for signal of practising fraud: if judgement carries out the acquisition of cheating signal in a step 102,
The radio-signal data then generated by the radio-signal data of caching, currently is recorded together, is saved in this way
Data could preferably cover entire cheating signal process.After detecting cheating blackout, terminate adopting for radio signal
Collection completes the acquisition of current cheating signal.The appearance that step 102 continues waiting for cheating signal is returned to later.
Step 104: the selection for signal data of practising fraud: to detect the Frequency point of cheating signal for the selection of main screening conditions
The cheating signal of acquisition before in database, the general acquisition data for choosing that nearest cheating signal of discovery time, which are used as, is
By the data source of transmitting.
Step 105: the data for signal of practising fraud being transferred to transmitting module, transmitting module will be with the power higher than cheating signal
Emit the cheating signal recorded, the purpose of compacting cheating signal is completed.
As shown in Fig. 2,
Step 201: the maximum midband that the frequency range of signal that easily occurs cheating at one's exam for needing to monitor is supported according to receiving device
Width values are divided into multiple minizones, such as: the frequency range that equipment maximum midband width values are 40MHz, needs monitor is 100MHz-
200MHz, the then minizone after dividing are as follows: 100MHz-140MHz, 140MHz-180MHz, 180MHz-200MHz.
Step 202: when no examination activity, using receiving device by the frequency spectrum maximum value curve of these minizones
It preserves, is then spliced into the triggering template of entire monitored frequency range.It is exactly that target frequency bands are not being examined that it is practical, which to trigger template,
Study frequency spectrum maximum value when disadvantage signal.
Step 203: the frequency spectrum of real-time monitoring target frequency bands when taking an examination progress, when there is cheating signal to occur, in real time
The maximum value of frequency spectrum can be higher than the maximum value curve of template, it is considered that the high 3dB or more of signal strength is exactly cheating letter
Number occur in the frequency point, and then cheating signal acquisition can be carried out in the frequency point.
As shown in figure 3,
It is to trigger template in frequency spectrum data (after FFT transform, i.e. the output of 304 modules) during general triggering collection
Afterwards, then start to save the signal sample data that 302 modules export, thus losing a part, that obtains signal message.And it is pre- slow
The mechanism of depositing is exactly that joined 303 cache modules, and constantly the data buffer storage by 302 outputs gets off.The size for caching section does not have to very
Greatly, it but wants can to cache and is greater than " data volume that system trigger is covered to acquisition time delay ", under this state, when triggering generation
When, the data of caching and real-time sampled data are stitched together by 305 modules, it will be able to which the complete cheating signal of output is adopted
Sample data.
Module provided in an embodiment of the present invention or device divide division only functionally, can physically merge or divide
It cuts.Module or the title of device can change with the difference of technological evolvement or application scenarios, but still be considered as of the invention
In protection scope.It will appreciated by the skilled person that implementing the method for the above embodiments is
Relevant hardware can be instructed to complete by program, the program can store to be situated between in a computer-readable storage
In matter, the program when being executed, including some instructions to execute method described in each embodiment of the present invention.Described here
Storage medium, such as: ROM/RAM, magnetic disk, CD.
Above-described specific embodiment, to the purpose of the present invention, technical solution and technology beneficial effect carried out into
One step is described in detail, it should be understood that being not used to limit this foregoing is merely a specific embodiment of the invention
The protection scope of invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all
It is included within protection scope of the present invention.
Claims (4)
1. a kind of cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, which comprises the following steps:
(1) acquisition of cheating signal: the frequency range for easily occurring cheating signal for target is monitored, when there is cheating signal to occur
It receives to get off cheating signal acquisition using monitoring, sample rate 51.2MHz, data bit width 16bit, and it is stored as data text
Part；
(2) practise fraud signal analysis: by it is collected cheating signal foundation characteristic reference record get off, and with number collected
According to one-to-one correspondence；
(3) control to cheating signal: when there is or it is expected to carry out continuing to certain frequency again compacting in signal of practising fraud, foundation
The strategy of control emits collected cheating signal by management and control devices, realizes the control to cheating signal.
2. it is according to claim 1 it is a kind of cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, feature
It is, in step (1), the mode using triggering is the template triggering collection of pre-stored mechanism.
3. it is according to claim 1 it is a kind of cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, feature
It is, in step (2), the foundation characteristic parameter of the cheating signal collected includes centre frequency, bandwidth, power, continues
Duration, discovery time.
4. it is according to claim 1 it is a kind of cheat at one's exam the management-control method of radio signal for strong vulnerability to jamming, feature
It is, in step (3), when carrying out control compacting, is suppressed using cheating signal collected.
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|---|---|---|---|
| CN201811140031.1A CN109525356B (en) | 2018-09-28 | 2018-09-28 | Management and control method for cheating radio signals in strong-immunity examination |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811140031.1A CN109525356B (en) | 2018-09-28 | 2018-09-28 | Management and control method for cheating radio signals in strong-immunity examination |
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| CN109525356B CN109525356B (en) | 2024-01-09 |
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