CN204967832U - Jointly disturb system based on frequency spectrum perception and modulation recognition - Google Patents
Jointly disturb system based on frequency spectrum perception and modulation recognition Download PDFInfo
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- CN204967832U CN204967832U CN201520768624.8U CN201520768624U CN204967832U CN 204967832 U CN204967832 U CN 204967832U CN 201520768624 U CN201520768624 U CN 201520768624U CN 204967832 U CN204967832 U CN 204967832U
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Abstract
The utility model discloses a jointly disturb system based on frequency spectrum perception and modulation recognition is mainly by control center to and the radiofrequency receiving module who links to each other with control center, binary channels analog -to -digital conversion module, a baseband signal processing module, the 2nd baseband signal processing module and an at least jammer are formed. Combining the perception of cognitive radio frequency spectrum and modulation recognition, applying to and disturb communication, both implemented the perception interference to the foundation of foreign side's link, the communication link who has set up the interlinkage to the foreign side again implements the communication jamming, still for our cognitive communication system conveying link information when disturbing to for we realized effective anti -interference tactics.
Description
Technical field
The utility model relates to communication technical field, is specifically related to a kind ofly combine EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification.
Background technology
Along with the development of wireless communication technology, Wireless Telecom Equipment increases day by day, and the transmission rate request for data is also more and more higher, and wireless communication rate is even up to hundreds of million per second.But the available frequency spectrum resource of people is limited, is also faced with the problem of frequency spectrum resource scarcity while wireless communication technology makes a breakthrough.And much authorizing frequency range, the most of the time is all in the free time, namely exists many " frequency spectrum cavity-pocket ", how to utilize these " frequency spectrum cavity-pockets " to become the popular problem of current research.Cognitive radio technology, as a kind of more intelligent spectrum detection and technology of sharing, can detect electromagnetic environment around, under the condition not disturbing authorized user, fully be used to the idle frequency range of authorized user, thus improves the availability of frequency spectrum.Modulation identification technology is a key technology in non-cooperative communication, and in the spectrum management of commercial communication, the communication countermeasures in frequency spectrum monitoring, communication failure detection and military communication all has a wide range of applications.By Modulation identification technology, can intercept and capture aerial signal, thus carry out Parameter analysis, be follow-up threat identification, the tasks such as information cracks, disturbance ecology provide important information.
In military communication, utilize frequency spectrum detection and the handoff technique of cognitive radio intelligence, can take fast and switch frequency spectrum resource, utilize Modulation identification technology, information interception can be realized on the link communicated, thus implement the demodulation of interference or information.Popular in idle frequency range transmission interference signal at present, to reach the object of perception interference.But this method can only produce interference to the cognitive user do not established the link, and the user for the link of having set up cannot implement effective interference, and also impacts our cognitive communications system after interference, makes us cognitive communications system also cannot run.And Modulation identification technology can only implement Communication Jamming to the communication user established the link, the link of cognitive communications system cannot be disturbed to be formed.
Utility model content
To be solved in the utility model is that the existing method to idle frequency range transmission interference signal cannot cannot implement effective interference to the user of the link of having set up, and the problem that the mode of Modulation Identification cannot disturb the link of cognitive communications system to be formed, provide a kind of and combine EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification.
For solving the problem, the utility model is achieved through the following technical solutions:
EVAC (Evacuation Network Computer Model) is combined based on frequency spectrum perception and Modulation Identification, primarily of control centre, and the Receiver Module be connected with control centre, double-channel analog/digital modular converter, the first baseband signal processing module, the second baseband signal processing module and at least one jammer form; Wherein to be subdivided into frequency sub-band g number relevant for number of units h and full frequency band during frequency spectrum perception of jammer, i.e. h=g-1; The data output end of Receiver Module is connected through the input of double-channel analog/digital modular converter with the first baseband signal processing module; The output of the first baseband signal processing module is connected with the input of the second baseband signal processing module; The output of the second baseband signal processing module is connected with the input of each jammer.
In such scheme, Receiver Module is made up of radio frequency receive antenna, band pass filter, radio frequency low-noise amplifier, radio frequency DDS, frequency mixer, radio frequency I road low pass filter, radio frequency Q road low pass filter, radio frequency I road automatic gain control amplifier and radio frequency Q road automatic gain control amplifier; Radio frequency receive antenna connects radio frequency low-noise amplifier through band pass filter, and the output of radio frequency low-noise amplifier is connected with an input of frequency mixer; The input connection control center of radio frequency DDS, the output of radio frequency DDS is connected with another input of frequency mixer; The output of frequency mixer is divided into I, Q two-way, wherein I road output connects the input of radio frequency I road automatic gain control amplifier through radio frequency I road low pass filter, and Q road output connects the input of radio frequency Q road automatic gain control amplifier through radio frequency Q road low pass filter; Radio frequency I road automatic gain control amplifier is connected the input of double-channel analog/digital modular converter with the output of the output of radio frequency Q road automatic gain control amplifier simultaneously.
In such scheme, jammer forms by disturbing FPGA, interference I way weighted-voltage D/A converter, interference Q way weighted-voltage D/A converter, interference I road low pass filter, interference Q road low pass filter, quadrature modulator, interference DDS, power amplifier, interference low pass filter and radio-frequency transmissions antenna; The input of interference FPGA connects the second baseband processing module, the output of interference FPGA is divided into I, Q two-way, wherein I road output connects the input of interference I road low pass filter through interference I way weighted-voltage D/A converter, and wherein Q road output connects the input of interference Q road low pass filter through interference Q way weighted-voltage D/A converter; The output of interference I road low pass filter and interference Q road low pass filter is connected to an input of quadrature modulator, the input connection control center of interference DDS simultaneously, and the output of interference DDS is connected to another input of quadrature modulator; The output of quadrature modulator connects the input of power amplifier through interference low pass filter, the output of interference low pass filter connects radio-frequency transmissions antenna.
Above-mentioned associating EVAC (Evacuation Network Computer Model), also comprises host computer further, and this host computer is connected with the second baseband processing module with the first baseband processing module.
Compared with prior art, cognitive radio frequency spectrum perception combines with Modulation Identification by the utility model, apply in interfere with communications, both the perception interference of the constitution and implementation to foreign side's link, again Communication Jamming is implemented to the communication link that foreign side has established the link, be also that our cognitive communications system transmits link information while interference, thus for we achieves effective Anti-interference Strategy.The interference signal production method that wherein frequency spectrum sensing method, the signal characteristic abstraction of the second baseband signal processing module internal operation and the Modulation Mode Recognition method run of the first baseband signal processing module inside and jammer inside are run is prior art and uses method, emphasis of the present utility model is combined at three, to realize effectively disturbing foreign side.
Accompanying drawing explanation
Fig. 1 is based on the system block diagram of combining EVAC (Evacuation Network Computer Model) of frequency spectrum perception with Modulation Identification.
Fig. 2 is the first baseband signal processing module and the concrete block diagram of the second baseband signal processing module.
Fig. 3 is Receiver Module structured flowchart.
Fig. 4 is jammer structured flowchart.
Embodiment
Based on combining EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification designed by said method, as shown in Figure 1, primarily of Receiver Module, double-channel analog/digital modular converter, the first baseband signal processing module, the second baseband signal processing module, control centre, host computer and at least one jammer composition.It is relevant that number of units h and full frequency band during frequency spectrum perception of jammer are subdivided into frequency sub-band g number, i.e. h=g-1.In the utility model preferred embodiment, because full frequency band is subdivided into 9 frequency sub-band, then jammer is 8.The data output end of Receiver Module is connected with the first baseband signal processing module through double-channel analog/digital modular converter.First baseband signal processing module is connected with the second baseband signal processing module.8 jammers are connected in a bus in parallel, and this bus is connected with the second baseband signal processing module.Control centre is connected with Receiver Module, double-channel analog/digital modular converter, the first baseband signal processing module, the second baseband signal processing module and 8 jammers respectively.Host computer is connected with the second baseband processing module with the first baseband processing module.
Control centre take ARM as main control chip, and the order being responsible for controlling whole system operation receives and sends.Host computer is PC, is responsible for the display of signal processing results.First baseband signal processing module take FPGA as processor, the perception of primary responsibility frequency spectrum and the communication with host computer.Second baseband signal processing module take DSP as processor, is responsible for the identification of signal madulation mode and communicates with host computer.Frequency spectrum sensing device is combined with Modulation Identification device, and the foundation of foreign side's cognitive user communication linkage can be disturbed to disturb again the communication of foreign side primary user.FPGA and DSP is combined, and relies on parallel processing capability and the high performance data-handling capacity of DSP that FPGA is powerful, and not only ensure that the accuracy of sophisticated signal process but also shorten the time of program operation, the construction cycle also reduces greatly simultaneously.First baseband signal processing module and the concrete block diagram of the second baseband signal processing module, see Fig. 2.
Receiver Module adopts zero intermediate frequency reciver, as shown in Figure 3, form primarily of radio frequency receive antenna, band pass filter, radio frequency low-noise amplifier, radio frequency DDS, frequency mixer, radio frequency I road low pass filter, radio frequency Q road low pass filter, radio frequency I road automatic gain control amplifier and radio frequency Q road automatic gain control amplifier.Radio frequency receive antenna connects radio frequency low-noise amplifier through band pass filter, and the output of radio frequency low-noise amplifier is connected with an input of frequency mixer.The input connection control center of radio frequency DDS, the output of radio frequency DDS is connected with another input of frequency mixer.The output of frequency mixer is divided into I, Q two-way, wherein I road output connects the input of radio frequency I road automatic gain control amplifier through radio frequency I road low pass filter, and Q road output connects the input of radio frequency Q road automatic gain control amplifier through radio frequency Q road low pass filter.Radio frequency I road automatic gain control amplifier is connected the input of double-channel analog/digital modular converter with the output of radio frequency Q road automatic gain control amplifier simultaneously.Radiofrequency signal is received by radio frequency receive antenna, is after the band pass filter after 3 ~ 30M through bandwidth, after low noise amplifier Linear Amplifer, enters an input of frequency mixer.Another input of frequency mixer connects the output of the DDS controlled by control centre.The output of frequency mixer is divided into I, Q two-way, I, Q two-way exports each after the low pass filter filtering of a 1.5M, enter automatic gain control amplifier respectively, after constant gain, I, Q two paths of signals enters a binary channels analog-to-digital conversion module and carries out analog-to-digital conversion, then enters the first baseband signal processing module and carries out information processing.In the utility model preferred embodiment, low noise amplifier adopts MWLA-000050M20, and working range is 100K ~ 50Mhz, can cover 3 ~ 30M full frequency band.DDS adopts AD9834, and output frequency is up to 37.5M, just can arbitrarily switch required frequency by control centre's processor to AD9834 transmitter register control word.Frequency mixer adopts RF2713, and its operating frequency range is 100K ~ 250M, can I, Q two-way is divided into by signal to move base band by Direct-conversion.Receiver adopts zero-if architecture, and adopts DDS as rate-adaptive pacemaker module, and control centre only needs to change DDS output frequency can be mixed to base band by different frequent points, compares double conversion structure simple, and effectively inhibits image frequency to disturb.
Jammer is responsible for generation and the transmission of the modulation signal such as PN (pseudo noise) sequence and ASK, 2ASK, FSK, 2FSK, PSK, 2PSK, QAM, as shown in Figure 4, primarily of interference FPGA, interference I way weighted-voltage D/A converter, interference Q way weighted-voltage D/A converter, interference I road low pass filter, interference Q road low pass filter, quadrature modulator, interference DDS, power amplifier, interference low pass filter and radio-frequency transmissions antenna composition.The input of interference FPGA connects the second baseband processing module, the output of interference FPGA is divided into I, Q two-way, wherein I road output connects the input of interference I road low pass filter through interference I way weighted-voltage D/A converter, and wherein Q road output connects the input of interference Q road low pass filter through interference Q way weighted-voltage D/A converter.The output of interference I road low pass filter and interference Q road low pass filter is connected to an input of quadrature modulator, the input connection control center of interference DDS simultaneously, and the output of interference DDS is connected to another input of quadrature modulator.The output of quadrature modulator connects the input of power amplifier through interference low pass filter, the output of interference low pass filter connects radio-frequency transmissions antenna.Built-in two signal generator modules of FPGA, a PN (pseudo noise) sequence generation module, a digital baseband signal generation module, this FPGA also with the second baseband signal processing module is connected simultaneously, is responsible for the transmission of signal characteristic parameter.When FPGA receives corresponding instruction, corresponding signal generator module work.As FPGA receives instruction 0000, then No. 000 jammer sends pseudo-random noise signal to now detecting frequency range, and when FPGA receives instruction 0001, then No. 000 jammer sends to this frequency range the similar modulation signal that the second baseband signal processing module detects.The baseband signal that FPGA produces is divided into I, Q two-way, and I, Q two-way becomes analog signal respectively through DA, then respectively through after low pass filter, sends into I, Q road of quadrature modulator.The output of the DDS that another termination of quadrature modulator is controlled by control centre, DDS produces the centre frequency now detecting frequency range, is input to quadrature modulator.Baseband signal is moved the frequency range now detected by quadrature modulator, and amplifies through power amplifier and after low pass filter filtering, by radio-frequency transmissions antenna transmission to aerial, complete the transmitting of interference signal.Jammer interference signal that available free frequency range is launched be pseudo-random noise signal, can identify by our cognitive user, i.e. jammer but also can be used as cognitive communications transmitter, sends frequency range and uses information to our cognitive user.Every platform jammer all carries DDS module and has corresponding coding sequence number, can disturb full frequency band and arbitrarily switch interference band, making interference can become accurate, flexibly.
This system can carry out real time scan supervision to electromagnetic environment in regulation frequency range, detect idle frequency range in real time accurately and take frequency range, for idle frequency range, then send our pseudo-random noise signal and take this idle frequency range fast, and our cognitive user can be distributed at any time, for busy frequency range, then pass through signal modulate, analyze signal characteristic and modulation system, thus determine whether enemy's signal, if enemy's signal, then carry out Waveform Design according to signal characteristic and modulation system, send the waveform signal similar to enemy, thus reach the object of comprehensive interference enemy communication.
Claims (4)
1. combine EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification, it is characterized in that, primarily of control centre, and the Receiver Module be connected with control centre, double-channel analog/digital modular converter, the first baseband signal processing module, the second baseband signal processing module and at least one jammer form; Wherein to be subdivided into frequency sub-band g number relevant for number of units h and full frequency band during frequency spectrum perception of jammer, i.e. h=g-1; The data output end of Receiver Module is connected through the input of double-channel analog/digital modular converter with the first baseband signal processing module; The output of the first baseband signal processing module is connected with the input of the second baseband signal processing module; The output of the second baseband signal processing module is connected with the input of each jammer.
2. according to claim 1ly combine EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification, it is characterized in that, Receiver Module is made up of radio frequency receive antenna, band pass filter, radio frequency low-noise amplifier, radio frequency DDS, frequency mixer, radio frequency I road low pass filter, radio frequency Q road low pass filter, radio frequency I road automatic gain control amplifier and radio frequency Q road automatic gain control amplifier; Radio frequency receive antenna connects radio frequency low-noise amplifier through band pass filter, and the output of radio frequency low-noise amplifier is connected with an input of frequency mixer; The input connection control center of radio frequency DDS, the output of radio frequency DDS is connected with another input of frequency mixer; The output of frequency mixer is divided into I, Q two-way, wherein I road output connects the input of radio frequency I road automatic gain control amplifier through radio frequency I road low pass filter, and Q road output connects the input of radio frequency Q road automatic gain control amplifier through radio frequency Q road low pass filter; Radio frequency I road automatic gain control amplifier is connected the input of double-channel analog/digital modular converter with the output of radio frequency Q road automatic gain control amplifier simultaneously.
3. according to claim 1ly combine EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification, it is characterized in that,
Jammer forms by disturbing FPGA, interference I way weighted-voltage D/A converter, interference Q way weighted-voltage D/A converter, interference I road low pass filter, interference Q road low pass filter, quadrature modulator, interference DDS, power amplifier, interference low pass filter and radio-frequency transmissions antenna; The input of interference FPGA connects the second baseband processing module, the output of interference FPGA is divided into I, Q two-way, wherein I road output connects the input of interference I road low pass filter through interference I way weighted-voltage D/A converter, and wherein Q road output connects the input of interference Q road low pass filter through interference Q way weighted-voltage D/A converter; The output of interference I road low pass filter and interference Q road low pass filter is connected to an input of quadrature modulator, the input connection control center of interference DDS simultaneously, and the output of interference DDS is connected to another input of quadrature modulator; The output of quadrature modulator connects the input of power amplifier through interference low pass filter, the output of interference low pass filter connects radio-frequency transmissions antenna.
4. according to claim 1ly combine EVAC (Evacuation Network Computer Model) based on frequency spectrum perception and Modulation Identification, it is characterized in that, also comprise host computer further, this host computer is connected with the second baseband processing module with the first baseband processing module.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108183766A (en) * | 2018-02-07 | 2018-06-19 | 成都和跃科技有限公司 | It is a kind of anti-monitor, it is counter take on the sly, anti-burst type transmiter device |
| CN110247729A (en) * | 2019-07-18 | 2019-09-17 | 中电科仪器仪表有限公司 | A kind of unmanned plane real-time tracking and quick counter integral control system and method |
| CN111131109A (en) * | 2019-12-31 | 2020-05-08 | 京信通信系统（中国）有限公司 | Signal identification method and device, computer equipment and storage medium |
| CN114490061A (en) * | 2022-01-25 | 2022-05-13 | 中国电子科技集团公司第五十四研究所 | Unmanned aerial vehicle communication interference task generation method based on semantic threat model |
| CN115001608A (en) * | 2022-04-11 | 2022-09-02 | 中国人民解放军63892部队 | Cognitive interference system based on general software radio platform architecture |
| CN116614153A (en) * | 2023-05-10 | 2023-08-18 | 徐州文尚网络科技有限公司 | Communication management method based on block chain |
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2015
- 2015-09-30 CN CN201520768624.8U patent/CN204967832U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108183766A (en) * | 2018-02-07 | 2018-06-19 | 成都和跃科技有限公司 | It is a kind of anti-monitor, it is counter take on the sly, anti-burst type transmiter device |
| CN108183766B (en) * | 2018-02-07 | 2024-06-04 | 成都和跃科技有限公司 | Anti-monitoring, anti-surreptitious shooting and anti-burst transmitter device |
| CN110247729A (en) * | 2019-07-18 | 2019-09-17 | 中电科仪器仪表有限公司 | A kind of unmanned plane real-time tracking and quick counter integral control system and method |
| CN110247729B (en) * | 2019-07-18 | 2022-01-14 | 中电科思仪科技股份有限公司 | Unmanned aerial vehicle real-time tracking and rapid countering integrated control system and method |
| CN111131109A (en) * | 2019-12-31 | 2020-05-08 | 京信通信系统（中国）有限公司 | Signal identification method and device, computer equipment and storage medium |
| CN114490061A (en) * | 2022-01-25 | 2022-05-13 | 中国电子科技集团公司第五十四研究所 | Unmanned aerial vehicle communication interference task generation method based on semantic threat model |
| CN115001608A (en) * | 2022-04-11 | 2022-09-02 | 中国人民解放军63892部队 | Cognitive interference system based on general software radio platform architecture |
| CN116614153A (en) * | 2023-05-10 | 2023-08-18 | 徐州文尚网络科技有限公司 | Communication management method based on block chain |
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Effective date of registration: 20180423 Address after: 541004 the Guangxi Zhuang Autonomous Region golden Guilin Qixing District Road No. 1 Co-patentee after: Zhejiang Uniview Technology Co., Ltd. Patentee after: Guilin University of Electronic Technology Address before: 541004 the Guangxi Zhuang Autonomous Region golden Guilin Qixing District Road No. 1 Patentee before: Guilin University of Electronic Technology |
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