CN111537963A - Radar electronic bait system for military training - Google Patents
Radar electronic bait system for military training Download PDFInfo
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- CN111537963A CN111537963A CN202010411572.4A CN202010411572A CN111537963A CN 111537963 A CN111537963 A CN 111537963A CN 202010411572 A CN202010411572 A CN 202010411572A CN 111537963 A CN111537963 A CN 111537963A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/38—Jamming means, e.g. producing false echoes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/54—Simulation of radar
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Abstract
The invention discloses a radar electronic bait system for military training, which comprises a radar device, wherein two groups of electronic bait devices with the same structure are arranged around the radar device, the radar device and the two groups of electronic bait devices are distributed in a shape like a Chinese character pin, and the distance between the radar device and the two groups of electronic bait devices is as follows: 200-300 m; the radar device comprises a main lobe antenna and a secondary lobe antenna, the characteristic parameters of signals sent by the electronic bait device are consistent with the characteristic parameters of signals sent by the secondary lobe antenna of the radar device, the energy domain of the transmitting antenna of the electronic bait device completely covers the energy output by the secondary lobe antenna of the radar device, and the electronic bait device keeps communication with the display and control terminal in real time, so that the transmission of control signals or detection signals is kept between the display and control terminal and the electronic bait device.
Description
Technical Field
The invention relates to a radar defense system, in particular to a radar electronic bait system.
Background
In order to cope with attacks from weapons such as air combat aircrafts and missiles, ground air defense weaponry is equipped with troops in large numbers, and plays an important role in air defense, air defense reaction and the like. The radar system is the 'eye' of ground air defense weaponry, is mainly used for searching for an air target, tracking the air target, guiding the air target and other multiple combat tasks, and is an important component of the ground air defense weaponry. Although playing an important role, radar systems are also constantly exposed to threats from the destruction of counterproductive missiles by enemies. The anti-radiation missile is a powerful weapon which integrates passive reconnaissance and destruction into a whole and attacks air defense radar facilities, and plays a great role in modern multi-field wars.
In order to solve the threat of the anti-radiation missile to the ground air defense radar device and enhance the protection capability of the air defense radar device, the electronic bait is produced by transportation. The electronic bait is a radar radiation source simulation device which is arranged near a ground air defense radar device, emits radar radiation with the same wave form, signal pattern, polarization mode and power as the radar device, and the aim of protecting the radar device is achieved by guiding an anti-radiation weapon to the electronic bait.
Disclosure of Invention
The invention aims to provide a radar electronic bait system for military training, which can protect a radar device when a missile attacks.
The purpose of the invention is realized as follows: the utility model provides a radar electron bait system for military training, includes the radar installations, be provided with the same electron bait device of two sets of structures around the radar installations, be "article" font distribution between radar installations and two sets of electron bait devices, and the distance is each other: 200-300 m; the radar device comprises a main lobe antenna and a secondary lobe antenna, the characteristic parameter of a signal sent by the electronic bait device is consistent with the characteristic parameter of a signal sent by the secondary lobe antenna of the radar device, the energy domain of the transmitting antenna of the electronic bait device completely covers the energy output by the secondary lobe antenna of the radar device, the pulse front edge of the output energy of the electronic bait device is earlier than the pulse front edge of the output energy of the secondary lobe antenna of the radar device, the pulse rear edge of the output energy of the electronic bait device lags behind the pulse rear edge of the output energy of the secondary lobe antenna of the radar device, and meanwhile, the electronic bait device keeps communication with the display and control terminal in real time, so that the transmission of a control signal or a detection signal is kept between the display and control terminal and.
As a further limitation of the invention, the electronic bait station includes:
the receiving antenna is used for receiving the radio frequency signals sent by the radar device side lobe antenna and sending the radio frequency signals to the receiving unit;
the receiving unit is used for processing the received radar radio frequency signal and sending the radar radio frequency signal to the detection processing unit;
the detection processing unit is used for carrying out acquisition analysis, signal detection and parameter measurement on the signals sent by the receiving unit, extracting characteristic parameters such as frequency, pulse width, repetition frequency period and the like of radar signals and sending the characteristic parameters to the baseband signal generating unit; simultaneously, according to the characteristic parameter information and the detection pulse information, performing radar signal repetition frequency tracking, and generating signal pulse width and repetition frequency time sequence information required by a baseband signal generation unit by taking the detection signal as a trigger condition; the front edge lead time and the rear edge lag time of the pulse can be set through the display and control terminal, and meanwhile, the reconnaissance processing unit sends the receiving unit and the state information of the receiving unit to the display and control terminal through the baseband signal generating unit during system self-checking;
the baseband signal generating unit is used for generating a baseband signal according to the radar signal characteristic parameter information and the generation time sequence sent by the reconnaissance processing unit, sending the baseband signal to the transmitting unit, simultaneously keeping communication with the display and control terminal, controlling the generation of a required local oscillation signal, controlling the transmitting unit to carry out frequency conversion and controlling the transmitting unit to carry out signal transmission according to a control command of the display and control terminal;
the transmitting unit is used for carrying out frequency mixing, filtering, amplifying and numerical control attenuation processing on the radar baseband signal or the interference baseband signal sent by the baseband signal generating unit to obtain a radio frequency radar signal or a radio frequency interference signal, and transmitting the radio frequency radar signal or the radio frequency interference signal through a transmitting antenna;
and the power supply unit is used for supplying power to the whole device.
As a further limitation of the present invention, the receiving unit includes a single-pole double-throw switch, a limiter, a first filter, a first digitally-controlled attenuator, a power divider, a first mixer, a second filter, a DLVA, a communication interface circuit, and a power supply circuit, the single-pole double-throw switch is configured to receive a radar signal or a self-detection signal, respectively, and has an output terminal connected to an input terminal of the limiter, an output terminal of the limiter is connected to an input terminal of the first filter, an output terminal of the first filter is connected to an input terminal of the first digitally-controlled attenuator, an output terminal of the first digitally-controlled attenuator is connected to an input terminal of the first mixer and an input terminal of the DLVA through the power divider, an output terminal of the first mixer is connected to an input terminal of the second filter, and the unit is configured to implement a self-detection mode and a working mode, wherein in the self-detection mode, the single-pole double-throw switch is switched, the self-checking signal enters a receiving channel, a video detection signal of the intermediate frequency signal is output, and whether the working state is normal or not is checked; under the working mode, the single-pole double-throw switch is switched to a radar signal branch, a radar signal enters a receiving channel, the power is limited within a safe level range after amplitude limiting processing, and a rear-stage device is prevented from being burnt; the bandwidth-independent signals are filtered by a first filter, the first numerical control attenuator adjusts the signals to a proper power level, and then the power is divided into two paths: one path of the signals is subjected to frequency mixing and filtering to obtain an intermediate frequency radar signal, and the intermediate frequency radar signal is sent to a subsequent unit for processing; one path of the radar signal is subjected to DLVA detection to obtain a radar signal pulse envelope, and the radar signal pulse envelope is sent to a subsequent unit for processing; the communication interface circuit is used for receiving the control command information of the reconnaissance processing unit, and the power supply circuit is used for supplying power to other parts after secondary processing is carried out on an external direct-current power supply.
As a further limitation of the present invention, the spy processing unit includes a signal processing backplane and an ADC daughter board; the signal processing bottom plate comprises three FPGA chips and one DSP chip, wherein the FPGA chips are respectively FPGA0, FPGA1 and FPGA2, the FPGA0 adopts Virtex-7 series FPGA XC7VX690T-2FFG1761I of Xilinx company to realize digital signal acquisition and processing functions, the FPGA1 adopts Virtex-7 series FPGA 7VX690T-2FFG1761I of Xilinx company to realize digital signal processing functions, the FPGA2 adopts XC6SLX45-2CSG324I of Xilinx company to realize single-board reset management, power supply power-on timing sequence, DSP mode configuration, EMIFB bus expansion of DSP and configuration functions of FPGA0 and FPGA 1; the DSP adopts TMS320C6678ACYPA25 eight-core DSP processor of TI company to realize digital signal processing and network communication functions; the ADC daughter board adopts an ADS62P49 chip of TI for realizing the acquisition function of analog intermediate frequency signals.
As a further limitation of the present invention, the baseband signal generating unit includes a clock management chip ADCLK925, a digital-to-analog conversion chip AD9739, and an FPGA chip XC65LX 150T.
As a further limitation of the present invention, the transmitting unit is composed of a third filter, a second mixer, a fourth filter, an amplifier, a second digitally controlled attenuator, a communication interface circuit, and a power supply circuit; the output end of the third filter is connected with the input end of the second mixer, the output end of the second mixer is connected with the input end of the fourth filter, the output end of the fourth filter is connected with the second numerical control attenuator through the amplifier, and the communication interface is used for receiving the control command sent by the baseband signal generating unit and executing corresponding operation according to the control command; the power circuit is used for receiving the direct current power supply sent from the outside, and converting the direct current power supply into various direct current power supplies for the transmitting unit after secondary power supply processing.
The working principle of the invention is as follows:
the two electronic bait devices are mainly used for simulating ground protection equipment of the radar device and are distributed around the protected radar device, after receiving a command of an anti-radiation weapon (missile) missile, a radar radiation source signal with the same signal characteristic as the radar device is transmitted, the radar device is shut down at proper time, and the anti-radiation weapon is guided to the mass center of the radar device or the mass centers of the two baits, so that the aim of protecting the radar device from being destroyed by the anti-radiation weapon is fulfilled; meanwhile, the whole process can be monitored and recorded in real time through communication with the display control terminal.
Compared with the prior art, the invention has the beneficial effects that: the invention can effectively realize the protection of the radar device and is beneficial to improving the training effect.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a block diagram of an electronic bait station module of the invention.
Fig. 3 is a block diagram of a receiving unit according to the present invention.
Fig. 4 is a block diagram of the signal processing board according to the present invention.
FIG. 5 is a block diagram of a baseband signal generating unit according to the present invention.
Fig. 6 is a block diagram of the transmitting unit in the present invention.
Fig. 7 is a block diagram of a transmitter according to the present invention.
FIG. 8 is a functional block diagram of application software in the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples.
The radar electronic bait system for military training shown in figure 1 comprises a radar device, wherein two groups of electronic bait devices with the same structure are arranged around the radar device, the radar device and the two groups of electronic bait devices are distributed in a shape like a Chinese character 'pin', and the distance between the radar device and the two groups of electronic bait devices is as follows: 200-300 m; the radar device comprises a main lobe antenna and a secondary lobe antenna, the characteristic parameter of a signal sent by the electronic bait device is consistent with the characteristic parameter of a signal sent by the secondary lobe antenna of the radar device, the energy domain of the transmitting antenna of the electronic bait device completely covers the energy output by the secondary lobe antenna of the radar device, the pulse front edge of the output energy of the electronic bait device is earlier than the pulse front edge of the output energy of the secondary lobe antenna of the radar device, the pulse rear edge of the output energy of the electronic bait device lags behind the pulse rear edge of the output energy of the secondary lobe antenna of the radar device, and meanwhile, the electronic bait device keeps communication with the display and control terminal in real time, so that the transmission of a control signal or a detection signal is kept between the display and control terminal and.
As shown in fig. 2, the electronic bait station includes:
the receiving antenna is used for receiving the radio frequency signals sent by the radar device side lobe antenna and sending the radio frequency signals to the receiving unit;
the receiving unit is used for processing the received radar radio frequency signal and sending the radar radio frequency signal to the detection processing unit;
the detection processing unit is used for carrying out acquisition analysis, signal detection and parameter measurement on the signals sent by the receiving unit, extracting characteristic parameters such as frequency, pulse width, repetition frequency period and the like of radar signals and sending the characteristic parameters to the baseband signal generating unit; simultaneously, according to the characteristic parameter information and the detection pulse information, performing radar signal repetition frequency tracking, and generating signal pulse width and repetition frequency time sequence information required by a baseband signal generation unit by taking the detection signal as a trigger condition; the front edge lead time and the rear edge lag time of the pulse can be set through the display and control terminal, and meanwhile, the reconnaissance processing unit sends the receiving unit and the state information of the receiving unit to the display and control terminal through the baseband signal generating unit during system self-checking;
the baseband signal generating unit is used for generating a baseband signal according to the radar signal characteristic parameter information and the generation time sequence sent by the reconnaissance processing unit, sending the baseband signal to the transmitting unit, simultaneously keeping communication with the display and control terminal, controlling the generation of a required local oscillation signal, controlling the transmitting unit to carry out frequency conversion and controlling the transmitting unit to carry out signal transmission according to a control command of the display and control terminal;
the transmitting unit is used for carrying out frequency mixing, filtering, amplifying and numerical control attenuation processing on the radar baseband signal or the interference baseband signal sent by the baseband signal generating unit to obtain a radio frequency radar signal or a radio frequency interference signal, and transmitting the radio frequency radar signal or the radio frequency interference signal through a transmitting antenna;
and the power supply unit is used for supplying power to the whole device.
The various elements of the electronic bait unit are described in greater detail below.
Receiving antenna
The main function of the receiving antenna is to receive radar signals radiated by the side lobe of the radar equipment in a space radiation mode. Receiving antenna adopts horn antenna in this scheme, directly installs horn antenna on antenna boom when using, and the radar direction is aimed at to the antenna orofacial features, links to each other through the down conversion module in radio frequency cable and the host computer.
Receiving unit
The receiving unit has the main functions of:
1) the radar radio frequency signals are subjected to amplitude limiting, filtering, numerical control attenuation and other processing, and the power of the radar signals is guaranteed not to burn back-end devices;
2) the radar radio frequency signal is subjected to frequency mixing, filtering, amplification and other processing to obtain a radar intermediate frequency signal;
3) carrying out logarithmic video detection processing on the radar radio frequency signal to obtain a radar signal detection envelope;
4) and receiving a self-checking signal sent by the frequency synthesis unit and used for receiving channel self-checking.
The receiving unit mainly comprises an amplitude limiter, a first filter, a first numerical control attenuator, a first mixer, a second filter, a DLVA, a communication interface circuit, a power supply circuit and the like. The block diagram of the components is shown in fig. 3.
The working principle of the receiving unit is as follows:
under the self-checking mode, the single-pole double-throw switch is switched to a self-checking signal branch, a self-checking signal enters a receiving channel, a logarithmic video detection signal of an intermediate frequency signal is output, and whether the working state of the module is normal or not is checked.
Under the working mode, the single-pole double-throw switch is switched to a radar signal branch, a radar signal enters a receiving channel, the power is limited within a safe level range after amplitude limiting processing, and a rear-stage device is prevented from being burnt; the bandwidth-independent signals are filtered by a first filter, the first numerical control attenuator pair adjusts the signals to a proper power level, and then the power is divided into two paths: one path of the signals is subjected to frequency mixing and filtering to obtain an intermediate frequency radar signal, and the intermediate frequency radar signal is sent to a subsequent unit for processing; one path of the radar signal is subjected to DLVA detection to obtain a radar signal pulse envelope, and the radar signal pulse envelope is sent to a subsequent unit for processing; the communication interface circuit is used for receiving the control command information of the reconnaissance processing unit, and the power supply circuit is used for supplying power to other parts after secondary processing is carried out on an external direct-current power supply.
Scout processing unit
The main functions of the reconnaissance processing unit are as follows:
1) collecting, processing and measuring parameters of the intermediate frequency signal and the video detection signal sent by the receiving unit, and extracting characteristic parameter information of the radar signal such as frequency, pulse width, repetition frequency period and the like;
2) according to the signal characteristic parameter information and the detection pulse information, carrying out repetition frequency tracking processing, and generating the pulse width, repetition frequency period and time sequence required by a baseband signal generating unit by taking the detection pulse as trigger; the pulse front edge advance time and the pulse rear edge lag time can be set through the display and control terminal, a 100MHz clock is used for processing the interior of the display and control terminal, the clock cycle is 10ns, and therefore the working frequency and the waveform of a bait state are consistent with those of a radar, the pulse front edge is advanced by 3 mus +/-0.5 mus, and the pulse rear edge lags by 3 mus +/-0.5 mus; the time sequence can be adjusted, the adjustment range is +/-3.5 microseconds, and the precision is 0.05 microseconds;
3) and the base band signal generating unit is communicated and interacted with information.
The reconnaissance processing unit consists of a signal processing bottom plate and an ADC daughter board.
The signal processing bottom plate conforms to VITA 46 standard, has a 6U VPX structure and mainly comprises 1 XC3S400AN FPGA, 2 XC7V690T FPGA and 1 TMS320C6678 DSP. The functional block diagram is shown in fig. 4.
FPGA0 adopts Virtex-7 series FPGA XC7VX690T-2FFG1761I of Xilinx company, and mainly realizes digital signal acquisition and processing functions.
FPGA1 adopts Virtex-7 series FPGA XC7VX690T-2FFG1761I of Xilinx company, and mainly realizes digital signal processing function.
The DSP adopts TMS320C6678ACYPA25 eight-core DSP processor of TI company, and mainly realizes digital signal processing and network communication functions.
The FPGA2 adopts XC6SLX45-2CSG324I of Xilinx company, and mainly has the functions of single-board reset management, power supply power-on timing, DSP mode configuration, EMIFB bus extension of DSP and configuration of the FPGA0 and the FPGA 1.
The ADC daughter board realizes the acquisition function of analog intermediate frequency signals. The ADC adopts 1 ADS62P49 of TI, 2 channels 250M and 14 bit; the clock adopts AD9516, and supports an on-board clock and an external clock; the number of the SSMB interfaces is 6, and the number of the FMC/LPC interfaces is 1.
The reconnaissance processing unit works according to the principle that: the reconnaissance processing unit is used for collecting and analyzing the intermediate frequency signal and the video detection signal sent by the receiving unit, detecting the signal, measuring parameters, extracting characteristic parameters such as frequency, pulse width, repetition frequency period and the like of the radar signal and sending the characteristic parameters to the baseband signal generating unit; simultaneously, according to the characteristic parameter information and the detection pulse information, the repetition frequency tracking of the radar signal is carried out, and the detection signal is taken as a trigger condition to generate the sequence information such as the pulse width, the repetition frequency and the like of the signal required by the baseband signal generating unit; in addition, the reconnaissance processing unit sends the receiving unit and the state information of the reconnaissance processing unit to the display control terminal through the baseband signal generating unit during system self-checking.
Baseband signal generating unit
The baseband signal generating unit mainly functions as follows:
1) baseband radar signal generation function: generating a baseband signal according to the radar signal characteristic parameter information and the generation time sequence sent by the reconnaissance processing unit; the types of signals which can be generated comprise conventional pulse signals, linear frequency modulation signals, phase coding signals, frequency agility signals, repetition frequency jitter signals, repetition frequency staggered signals and the like;
2) communication function: the system is communicated with a display and control terminal, receives parameter and control command information and reports self-checking information to the display and control terminal;
3) unit control function: according to the control command of the display control terminal, the frequency synthesis unit is controlled to generate a required local oscillation signal, the transmitting unit is controlled to carry out frequency conversion, and the transmitting unit is controlled to carry out signal transmission.
The baseband signal generating unit mainly comprises a clock management chip ADCLK925, a digital-to-analog conversion chip AD9739, an FPGA chip XC65LX150T, other interface circuit chips and the like. The block diagram is shown in fig. 5.
The AD9739 is a 14-bit high-performance DAC, can provide a sampling rate as high as 2500MSPS, supports the generation of baseband multi-tone signals reaching the Nyquist frequency, can generate high-quality broadband signals with low noise and low intermodulation distortion and a bandwidth as high as 1GHz, has a spurious-free dynamic range of 60dBc @2GSPS, is provided with a dual-port LVDS interface, and has a programmable output current range of 8.66 mA-31.66 mA.
The baseband signal generating unit mainly adopts a large-scale FPGA chip to complete the generation of various forms of modulation signals such as frequency, pulse width, repetition frequency, amplitude and the like of the signals; the core of the baseband signal generating unit is a high-level application technology adopting a large-scale FPGA chip, namely a parallel pipeline processing structure, and the scale and the pipeline beat number of a parallel processor can be properly expanded and cut according to the system application scale.
Transmitting unit
The transmitting unit mainly has the function of processing radar baseband signals or interference baseband signals sent by the baseband signal generating unit by frequency mixing, filtering, amplifying, numerical control attenuation and the like to obtain radio frequency radar signals or radio frequency interference signals.
The transmitting unit mainly comprises a third filter, a second mixer, a fourth filter, an amplifier, a second digital attenuator, a communication interface circuit, a power supply circuit and the like, and the block diagram of the transmitting unit is shown in fig. 6.
The transmitting unit receives the radar baseband signal or the interference baseband signal sent by the baseband signal generating unit, firstly filters harmonic spurious signals outside a working frequency band, then carries out frequency mixing processing with a local oscillator signal in a frequency mixer to obtain radio frequency signals, then filters other out-of-band harmonic spurious signals after frequency mixing through a filter, and then carries out power adjustment and outputs the signals. The communication interface is used for receiving the control command sent by the baseband signal generating unit and executing corresponding operation according to the control command; the power circuit is used for receiving the direct current power supply sent from the outside, and converting the direct current power supply into various direct current power supplies for the transmitting unit after secondary power supply processing.
Fast local oscillator and clock unit
The main functions of the fast local oscillator and clock unit are as follows:
1) generating local oscillation signals required by frequency mixing of a receiving unit and a transmitting unit;
2) generating clock signals required by the work of the reconnaissance processing unit and the baseband signal generating unit;
3) generating a self-checking signal required by system self-checking;
4) the self-defined interface is communicated with the baseband signal generating unit, and the local oscillator signal, the clock signal and the self-checking signal are generated according to the control command sent by the baseband signal generating unit.
The fast local oscillator and clock unit mainly comprises a crystal oscillator, a PDRO (phase-locked dielectric oscillator), a PLL (phase-locked loop), a power divider, an amplifier, a filter, a control circuit and the like. In the design of a frequency synthesis unit, a reference source adopts a 100MHz constant temperature crystal oscillator (OCXO) with excellent noise performance, the phase noise of 1kHz is-110 dBc, and the frequency synthesis unit has high frequency precision and frequency stability. Each PDRO and PLL reference clock is 100MHz, and each path of signal adopts measures such as amplification and filtering in the design process so as to ensure that the harmonic wave and the spurious performance of the signal meet the index requirements.
Due to the adoption of the technical scheme of frequency selection of the PDRO single-point filter and the combination of the crystal oscillator with high stability and high phase noise, the frequency synthesizer can realize the technical indexes that local oscillator harmonic waves and stray waves are less than or equal to-55 dBc, phase noise is-100 dBc/Hz @1kHz, and output power is greater than or equal to 13 dBm.
Power supply unit
The power supply unit mainly functions to convert alternating current into direct current to provide required direct current power supply for other functional units of the system.
The power supply unit consists of an AC-DC power supply module, a DC-DC power supply module and an auxiliary circuit. The AC-DC power supply module converts the accessed direct current 220V alternating current voltage into +12V direct current voltage; the DC-DC power supply module converts the +12V direct current voltage into +5V and +3.3V direct current voltage for each unit to use.
In order to further ensure the transmission distance of signals, the transmitting unit also comprises a power amplifying unit which mainly comprises a transmitting antenna and a transmitter.
When the device is used, the transmitting antenna is arranged on a tripod head capable of adjusting the azimuth and the elevation, connected to a hard waveguide through a hard rotating joint and connected with the transmitter end through a soft waveguide with the length of 20 meters (insertion loss < 2.3 dB). In the test process, if the antenna or the waveguide is damaged and needs to be replaced, the field replacement time of the antenna and the waveguide is about 20 minutes, and if the guarantee personnel are not in the spot, the time of entering the spot and withdrawing the spot of the personnel is also taken into consideration.
The transmitter adopts the traveling wave tube as a final amplifier, and a high-voltage power supply, the traveling wave tube and other auxiliary parts are arranged in the same case and are arranged close to the antenna, so that the loss of a feeder line is reduced, and the output power of the traveling wave tube is utilized to the maximum extent. The high-power filament lamp mainly comprises a high-power pulse traveling wave tube, a high-voltage transformation module, a filament power supply module, an auxiliary power supply module, a preamplifier, a control and protection communication board, a soaking module and other accessories. The high-voltage transformation module and the filament power supply module supply power to the high-power traveling wave tube; the auxiliary power supply module supplies power to other low-voltage device modules; a microwave device such as a preamplifier and the like amplifies and conditions an input radio frequency excitation signal; the control and protection communication board completes the control of the module and the coupling monitoring of the output power of the transmitter by the high-power directional coupler for state monitoring and returns the output power to the whole machine through the control and protection communication board; the soaking module is used for conducting and cooling the traveling wave tube, the high-voltage power supply module and the like. The block diagram is shown in fig. 7.
Display control terminal
The display and control terminal is an important component of the electronic bait system and mainly comprises a notebook computer, a battery, a charger and the like. The display control unit is referenced to model number associative notebook thinpap wing 480.
Software design
The electronic bait system software mainly comprises three parts, namely system software, support software and application software. The system software is software for managing and operating computer system resources, namely an operating system; all software for helping and supporting the development and operation of application software belongs to the supporting software; the application software is the software which supports the system to complete all functions and performance indexes. The system adopts a Win7 operating system to support and manage computer software and hardware; a C + + programming language and a Visual Studio2010 compiling environment are adopted, and the environment provides a friendly programming environment, a convenient debugging tool and a rich basic class library for a user and is convenient for developing display and control software; the main task of the application software is to set various test states and test parameters according to the test training requirements, generate radar signals and interference signals and complete the control of the electronic bait. The functional block diagram of the application software is shown in fig. 8.
The electronic bait system application software consists of interference control, bait control, information display, self-checking and log functions.
1) Self-checking function: performing power-on self-test or manual self-test on the equipment;
2) interference control function: controlling an interference frequency band, an interference pattern, an interference parameter and an interference switch state of the equipment;
3) bait control function: controlling the working frequency band of the bait, the bait parameters and the on-off state of the bait;
4) an information display function: displaying the state information of the equipment, the detected radar parameter information and the set parameter information;
5) data recording function: and data recording and saving are carried out on the state of the equipment, the operation of the equipment and the detected radar parameters.
Application software functional design
1) Self-checking:
power-on self-test: and after the software is started, the equipment is automatically detected. If the fault occurs, listing fault modules;
manual self-checking: triggered by the user, the device is detected. And after the detection is finished, listing the running state of each module.
2) Bait parameter control:
bait frequency band control: there are two control modes, frequency steering and manual frequency setting. Under the frequency guiding mode, directly guiding the bait frequency according to the detected radar equipment signal frequency; in the manual frequency setting mode, an operator sets the bait frequency manually;
bait parameter control: setting parameters such as the leading edge advance time of the bait signal pulse, the trailing edge delay time of the bait signal pulse, the bait signal power and the like according to actual needs;
bait switch control: controls the transmission and stop states of the bait signal.
3) Information display
And displaying the equipment state: the state display of the composition module is provided, and alarm information is given to the fault module;
displaying scout parameters: displaying the parameters of the detected radar signal frequency, pulse width, repetition frequency period and the like in a list;
setting parameter display: the set perturbation/decoy signal parameters are tabulated.
4) Data recording function
Recording the state of the equipment: recording the working state condition of the equipment;
recording the operation of the equipment: recording information such as setting parameters and control states of the equipment;
recording scout parameters: and recording the detected radar signal parameter information.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (6)
1. The utility model provides a radar electron bait system for military training, includes radar installations, its characterized in that, be provided with the same electron bait device of two sets of structures around radar installations, be "article" font distribution between radar installations and two sets of electron bait devices, and the distance is each other: 200-300 m; the radar device comprises a main lobe antenna and a secondary lobe antenna, the characteristic parameter of a signal sent by the electronic bait device is consistent with the characteristic parameter of a signal sent by the secondary lobe antenna of the radar device, the energy domain of the transmitting antenna of the electronic bait device completely covers the energy output by the secondary lobe antenna of the radar device, the pulse front edge of the output energy of the electronic bait device is earlier than the pulse front edge of the output energy of the secondary lobe antenna of the radar device, the pulse rear edge of the output energy of the electronic bait device lags behind the pulse rear edge of the output energy of the secondary lobe antenna of the radar device, and meanwhile, the electronic bait device keeps communication with the display and control terminal in real time, so that the transmission of a control signal or a detection signal is kept between the display and control terminal and.
2. The radar electronic decoy system for military training of claim 1, wherein the electronic decoy comprises:
the receiving antenna is used for receiving the radio frequency signals sent by the radar device side lobe antenna and sending the radio frequency signals to the receiving unit;
the receiving unit is used for processing the received radar radio frequency signal and sending the radar radio frequency signal to the detection processing unit;
the detection processing unit is used for carrying out acquisition analysis, signal detection and parameter measurement on the signals sent by the receiving unit, extracting characteristic parameters such as frequency, pulse width, repetition frequency period and the like of radar signals and sending the characteristic parameters to the baseband signal generating unit; simultaneously, according to the characteristic parameter information and the detection pulse information, performing radar signal repetition frequency tracking, and generating signal pulse width and repetition frequency time sequence information required by a baseband signal generation unit by taking the detection signal as a trigger condition; the front edge lead time and the rear edge lag time of the pulse can be set through the display and control terminal, and meanwhile, the reconnaissance processing unit sends the receiving unit and the state information of the receiving unit to the display and control terminal through the baseband signal generating unit during system self-checking;
the baseband signal generating unit is used for generating a baseband signal according to the radar signal characteristic parameter information and the generation time sequence sent by the reconnaissance processing unit, sending the baseband signal to the transmitting unit, simultaneously keeping communication with the display and control terminal, controlling the generation of a required local oscillation signal, controlling the transmitting unit to carry out frequency conversion and controlling the transmitting unit to carry out signal transmission according to a control command of the display and control terminal;
the transmitting unit is used for carrying out frequency mixing, filtering, amplifying and numerical control attenuation processing on the radar baseband signal or the interference baseband signal sent by the baseband signal generating unit to obtain a radio frequency radar signal or a radio frequency interference signal, and transmitting the radio frequency radar signal or the radio frequency interference signal through a transmitting antenna;
and the power supply unit is used for supplying power to the whole device.
3. The radar electronic decoy system for military training of claim 2, wherein the receiving unit comprises a single-pole double-throw switch, a limiter, a first filter, a first digitally controlled attenuator, a power divider, a first mixer, a second filter, a DLVA, a communication interface circuit and a power circuit, the single-pole double-throw switch is configured to receive a radar signal or a self-checking signal, and has an output terminal connected to an input terminal of the limiter, an output terminal of the limiter is connected to an input terminal of the first filter, an output terminal of the first filter is connected to an input terminal of the first digitally controlled attenuator, an output terminal of the first digitally controlled attenuator is connected to an input terminal of the first mixer and an input terminal of the DLVA through the power divider, an output terminal of the first mixer is connected to an input terminal of the second filter, and the unit is configured to implement a self-checking mode and a working mode, in the self-checking mode, the single-pole double-throw switch is switched to a self-checking signal branch, a self-checking signal enters a receiving channel, a video detection signal of an intermediate frequency signal is output, and whether the working state is normal or not is checked; under the working mode, the single-pole double-throw switch is switched to a radar signal branch, a radar signal enters a receiving channel, the power is limited within a safe level range after amplitude limiting processing, and a rear-stage device is prevented from being burnt; the bandwidth-independent signals are filtered by a first filter, the first numerical control attenuator adjusts the signals to a proper power level, and then the power is divided into two paths: one path of the signals is subjected to frequency mixing and filtering to obtain an intermediate frequency radar signal, and the intermediate frequency radar signal is sent to a subsequent unit for processing; one path of the radar signal is subjected to DLVA detection to obtain a radar signal pulse envelope, and the radar signal pulse envelope is sent to a subsequent unit for processing; the communication interface circuit is used for receiving the control command information of the reconnaissance processing unit, and the power supply circuit is used for supplying power to other parts after secondary processing is carried out on an external direct-current power supply.
4. The radar electronic decoy system for military training of claim 2, wherein the reconnaissance processing unit comprises a signal processing backplane and an ADC daughter board; the signal processing bottom plate comprises three FPGA chips and one DSP chip, wherein the FPGA chips are respectively FPGA0, FPGA1 and FPGA2, the FPGA0 adopts Virtex-7 series FPGA XC7VX690T-2FFG1761I of Xilinx company to realize digital signal acquisition and processing functions, the FPGA1 adopts Virtex-7 series FPGA 7VX690T-2FFG1761I of Xilinx company to realize digital signal processing functions, the FPGA2 adopts XC6SLX45-2CSG324I of Xilinx company to realize single-board reset management, power supply power-on timing sequence, DSP mode configuration, EMIFB bus expansion of DSP and configuration functions of FPGA0 and FPGA 1; the DSP adopts TMS320C6678ACYPA25 eight-core DSP processor of TI company to realize digital signal processing and network communication functions; the ADC daughter board adopts an ADS62P49 chip of TI for realizing the acquisition function of analog intermediate frequency signals.
5. The radar electronic decoy system for military training of claim 2, wherein the baseband signal generating unit comprises a clock management chip ADCLK925, a digital-to-analog conversion chip AD9739 and an FPGA chip XC65LX 150T.
6. The radar electronic decoy system for military training of claim 2, wherein the transmitting unit is composed of a third filter, a second mixer, a fourth filter, an amplifier, a second digital attenuator, a communication interface circuit, and a power supply circuit; the output end of the third filter is connected with the input end of the second mixer, the output end of the second mixer is connected with the input end of the fourth filter, the output end of the fourth filter is connected with the second numerical control attenuator through the amplifier, and the communication interface is used for receiving the control command sent by the baseband signal generating unit and executing corresponding operation according to the control command; the power circuit is used for receiving the direct current power supply sent from the outside, and converting the direct current power supply into various direct current power supplies for the transmitting unit after secondary power supply processing.
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| CN112859015A (en) * | 2021-01-11 | 2021-05-28 | 中国人民解放军战略支援部队信息工程大学 | Fully-polarized radar bait device with novel structure and method |
| RU2818300C1 (en) * | 2023-11-28 | 2024-05-02 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный университет телекоммуникаций и информатики" | Method of protecting radio transmitters from direction finding |
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