CN107168098A - A kind of Electronic Countermeasures Simulation System - Google Patents
A kind of Electronic Countermeasures Simulation System Download PDFInfo
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- CN107168098A CN107168098A CN201710335661.3A CN201710335661A CN107168098A CN 107168098 A CN107168098 A CN 107168098A CN 201710335661 A CN201710335661 A CN 201710335661A CN 107168098 A CN107168098 A CN 107168098A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
Abstract
The invention provides a kind of Electronic Countermeasures Simulation System, including signal generation module, the signal generation module is used to generate pulse descriptive word data flow according to the scenario parameters of reception, and the pulse descriptive word data flow is exported to carry out signal imitation.The essential characteristic of radio-frequency pulse is described by using pulse descriptive word, Battle Field Electromagnetic complicated and changeable can be fully described, including electromagnetic environment the feature in terms of time domain, frequency domain and spatial domain, demand of the Simulation for Electronic Countermeasures to the complicated Battle Field Electromagnetic of simulation is met.
Description
Technical field
The present invention relates to simulation technical field, and in particular to a kind of Electronic Countermeasures Simulation System.
Background technology
Developing rapidly for science and technology, greatly changes the looks of modern battlefield, wherein electronic station, i.e. electronic countermeasure,
As a kind of important means of warfare, status and effect in modern war are known together by common people.Electronic countermeasure is exactly to oppose
To both sides be weaken, the effective utilization of destruction other side's electronic equipment, to ensure that one's own side electronic equipment plays that efficiency takes various
Electronics measure and action.Because combat exercise is huge for the assessment consumption of the electronics war of resistance, therefore generally use emulation technology pair
The electronics war of resistance carries out simulated test.
Electronic Countermeasures Simulation System of the prior art is main by microwave dark room, Radar Signal Environment Simulator, radar mould
Intend device, radiofrequency signal generation system, simulation computer network and software, display control program, turntable, instrumentation instrument timely
Communication equipment etc. of uniting is constituted.Wherein radar signal simulator is according to each radar emission signal parameter set by combat, simulation life
Into the microwave signal of each radar.
The design method of radar signal simulator is broadly divided into two kinds in the prior art：The first is based on digital frequency memory skill
The signal imitation source design of art, second is the signal imitation source design based on Direct Digital.The first technology is set
The simulation source versatility of meter is stronger, but hardware complexity is higher, with high costs；The simulation source hardware letter of second of Technology design
Single, cost is low, but versatility is poor, and is difficult to simulate more complicated radar signal, often only simulates simple point target
Echo-signal.
And in modern battlefield, due to the use of a large amount of radars, missile armament and signal equipment, Battle Field Electromagnetic is abnormal
Complexity, has substantial amounts of Battle Field Electromagnetic in less scope.Therefore, the above method is retouched to radar emission signal set
State less efficient and inaccurate, be unsatisfactory for the demand of Electronic Countermeasures Simulation System.
The content of the invention
For drawbacks described above of the prior art, the present invention provides a kind of Electronic Countermeasures Simulation System.
The Electronic Countermeasures Simulation System that the present invention is provided, including signal generation module, the signal generation module are used for root
Pulse descriptive word data flow is generated according to the scenario parameters of reception, and the pulse descriptive word data flow is exported to carry out signal mode
Intend.
Wherein, the system also includes：Control module and signal imitation module；The control module is used for according to reception
The setting instruction generation scenario parameters, and the scenario parameters are sent to the signal generation module；The signal imitation mould
Block is used for according to the pulse descriptive word data flow received from the signal generation module, simulates and exports radio frequency analog letter
Number.
Wherein, the signal generation module includes description word cell, hybrid-sorting unit and overlap processing unit；It is described to retouch
Stating word cell is used to generate pulse descriptive word according to the scenario parameters, and the pulse descriptive word is sent to the mixing row
Sequence unit；The hybrid-sorting unit was used for according to pulse front edge arrival time, and multiple pulse descriptive words are ranked up,
Pulse descriptive word sequence is obtained, and the pulse descriptive word sequence is sent to the overlap processing unit；The overlap processing
Unit is used to abandon or merging treatment pulse overlapping in the pulse descriptive word sequence, obtains the pulse descriptive word
Data flow, and the pulse descriptive word data flow is sent to the signal imitation module.
Wherein, the signal imitation module includes intermediate frequency analogue unit and radio frequency analog unit；The intermediate frequency analogue unit
For carrying out frequency-conversion processing to the pulse descriptive word data flow, analog intermediate frequency signal is obtained, and by the analog intermediate frequency signal
Send to the radio frequency analog unit；The radio frequency analog unit is used to carry out upconversion process to the analog intermediate frequency signal,
Radio frequency analog signal is obtained, and the radio frequency analog signal is injected by radar receiver by injection way.
Wherein, the intermediate frequency analogue unit is additionally operable to export pulse carrier frequency code and impulse amplitude code to the radio frequency analog
Unit is to adjust the frequency and amplitude of the radio frequency analog signal.
Wherein, the intermediate frequency analogue unit is additionally operable to：, will be before the default sequential condition after default sequential condition
Radar type number, pulse carrier frequency code, pulse arrival bearing code and the impulse amplitude code of latch are exported to the radio frequency analog unit.
Wherein, the intermediate frequency analogue unit is realized by intermediate frequency data playback card, and the intermediate frequency data playback card includes DSP
Module, FPGA module and DDS module；The DSP module is connected with the signal generation module, for receiving in data, data
Disconnected management and data buffer storage；The FPGA module is connected with the DSP module, for the filter of Clock management, logic control and interpolation
Ripple processing；The DDS module is connected with the FPGA module and the DSP module respectively, for providing numeral for orthogonal modulation
Carrier signal.
Wherein, the DSP module includes wave generating unit, data buffer storage unit, pci interface and configuration control unit；
The pci interface is connected with pci bus, the data buffer storage unit and the configuration control unit respectively, wherein, the control
Module accesses address space inside the DSP module and to the DSP module loading procedure by the pci interface, and
The DSP module accesses exterior PC I memory spaces by the pci interface；The wave generating unit and the data buffer storage
Unit is connected with the FPGA module respectively, for the data acquisition signal shape information sent according to the control module, and
Signal waveform information and data message are sent to the FPGA module to carry out interpolation and filtering process；The configuration control is single
It is first to be connected with the DDS module, during the data for being sent according to the control module are carried out to the operation in the DDS module
Disconnected management.
Wherein, the FPGA module includes logic control element, address decoding unit, interpolation filtering unit, cell fifo
With DCM units；The interpolation filtering unit is connected with the DSP module and cell fifo respectively, for sending out the DSP module
The data sent carry out high speed interpolation and filtering process, and are sent the data after processing to the DDS by the cell fifo
Module；The DCM units are connected with the DDS module, for entering row clock pipe to DDS module offer reference clock
Reason.
Wherein, the DDS module includes reverse cic filter, half-band filter, cic filter, D/A units, function list
Member and multiplier unit；The reverse cic filter is connected by the half-band filter with the cic filter, for constituting
Interpolation filter is to carry out part interpolation functions；The passband that the reverse cic filter is used to compensate the cic filter declines
Subtract, to ensure that there is flat amplitude response in Nyquist Bandwidth；The multiplier unit is connected with the FPGA unit, is used for
Process of frequency multiplication is carried out to reference clock to obtain system clock, the system clock is the work clock of the DDS module.
The Electronic Countermeasures Simulation System that the present invention is provided, the substantially special of radio-frequency pulse is described by using pulse descriptive word
Levy, can fully describe Battle Field Electromagnetic complicated and changeable, including electromagnetic environment the spy in terms of time domain, frequency domain and spatial domain
Levy, meet demand of the Simulation for Electronic Countermeasures to the complicated Battle Field Electromagnetic of simulation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the block diagram of Electronic Countermeasures Simulation System provided in an embodiment of the present invention；
Fig. 2 is the block diagram of signal generation module provided in an embodiment of the present invention；
Fig. 3 is the block diagram of signal imitation module provided in an embodiment of the present invention；
Fig. 4 is the design frame chart of radio frequency analog unit provided in an embodiment of the present invention；
Fig. 5 is the structured flowchart that PDW data provided in an embodiment of the present invention generate analog intermediate frequency signal in real time；
Fig. 6 is the block diagram of the embodiment of intermediate frequency analogue unit provided in an embodiment of the present invention；
Fig. 7 is the hard-wired block diagram of pci data playback card provided in an embodiment of the present invention；
Fig. 8 is the block diagram that pci data playback card provided in an embodiment of the present invention realizes logic；
Fig. 9 is the block diagram of data readback function implementation provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described, it is clear that described embodiment be the present invention
A part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, the scope of protection of the invention is belonged to.
The embodiment of the present invention provides a kind of Electronic Countermeasures Simulation System, including signal generation module, the signal generation mould
Block is used to generate pulse descriptive word data flow according to the scenario parameters of reception, and the pulse descriptive word data flow is exported
Row signal imitation.
Wherein, scenario parameters are the parameters that Battle Field Electromagnetic is described, and pulse signal module can be according to this
Scape pulse signal is simulated, and it is expected obtained pulse signal in emulation to simulate obtained pulse signal.
Battle Field Electromagnetic refers to the set up to all radar emission signals of EW Equipment, and EW Equipment is received
What machine was received is then the stream of pulses of these radar signals formation.Pulse descriptive word (Pulse Describe Word, PDW) can
For describing the essential characteristic of radio-frequency pulse.Pulse descriptive word (PDW) generally includes herein below：Pulse carrier frequency (RF), arteries and veins
Rush width (PW), pulse front edge arrival time (TOA), pulse angle of arrival (DOA) and impulse amplitude (PA).For convenience,
Pulse descriptive word is hereafter represented with PDW.
In addition, apart from the above parameters, pulse recurrence interval (PRI) is also investigated in PDW, PRI is that any two is adjacent
Pulse spacing between pulse, the pulse spacing can embody rule by prolonged accumulation.Therefore, generally make in PDW
TOA is replaced with PRI to investigate the temporal regularity of pulse.Therefore, in embodiments of the present invention, above-mentioned five parameters can be used
(RF, PW, PRI, DOA and PA) sets up PDW models.Scenario parameters are inputted after PDW models, a PDW can be obtained；Will correspondence
After the scenario parameters input PDW models of different radars, it can obtain including multiple PDW PDW data flows.
Electronic Countermeasures Simulation System provided in an embodiment of the present invention, radio-frequency pulse is described by using pulse descriptive word
Essential characteristic, can fully describe Battle Field Electromagnetic complicated and changeable, including electromagnetic environment in the side such as time domain, frequency domain and spatial domain
The feature in face, meets demand of the Simulation for Electronic Countermeasures to the complicated Battle Field Electromagnetic of simulation.
Fig. 1 is the block diagram of Electronic Countermeasures Simulation System provided in an embodiment of the present invention, as shown in figure 1, based on above-mentioned implementation
Example, the system also includes：Control module 101 and signal imitation module 103；The control module 101 is used for according to reception
The setting instruction generation scenario parameters, and the scenario parameters are sent to the signal generation module 102；The signal imitation
Module 103 is used to, according to the pulse descriptive word data flow received from the signal generation module 102, simulate and export radio frequency
Analog signal.
Wherein, control module 101 is control and the operation center of Radar Simulation System, is analogue system and user or upper strata
The passage of system interaction.Control module 101 is mainly used in receiving setting instruction of the user for analogue system, setting instruction reflection
The desired pulse of user.Control module 101 is connected with signal imitation module 102, by according to the specified obtained scene of setting
Parameter is sent to signal generation module 102.
In addition to above-mentioned functions, control module 101 also includes following functions：Receive top level control computer control instruction and
Data；The mode of operation of Radar Simulation System is set；Complete signal the bookbinding of parameter such as waveform, carrier frequency, intra-pulse modulation and under
Carry, the various signal waveforms of guinea pig；The movement locus of tracked target is set and the signal waveform of tracking beam is selected simultaneously
Download, search, tracking and the various working methods such as search plus tracking of guinea pig；In real time to each letter of Radar Simulation System
Number generation unit and control unit carry out status inquiry and trouble shooting, and show on interface the state of each unit；Pass through net
Network receives and shown the respective working condition of each subsystem upload and the running parameter of Radar Simulation System and state is real
When be uploaded to top level control center.
Wherein, signal imitation module 103 is connected with signal generation module 102, is received according to from signal generation module 102
PDW data flows, simulation produces radio frequency analog signal, and sends radio frequency analog signal.
Fig. 2 is the block diagram of signal generation module provided in an embodiment of the present invention, as shown in Fig. 2 based on above-described embodiment, institute
Stating signal generation module includes：Word cell 201, hybrid-sorting unit 202 and overlap processing unit 203 are described；The describing word
Unit 201 is used to generate pulse descriptive word according to the scenario parameters, and the pulse descriptive word is sent to the mixing row
Sequence unit 202；The hybrid-sorting unit 202 was used for according to pulse front edge arrival time, and multiple pulse descriptive words are entered
Row sequence, obtains pulse descriptive word sequence, and the pulse descriptive word sequence is sent to the overlap processing unit 203；Institute
Stating overlap processing unit 203 is used to abandon or merging treatment pulse overlapping in the pulse descriptive word sequence, obtains
The pulse descriptive word data flow, and the pulse descriptive word data flow is sent to the signal imitation module.
Wherein, in hybrid-sorting unit 202, each PDW corresponds to the pulse of a radar respectively, therefore can be to multi-section thunder
The PDW reached carries out priority sequence according to TOA order, forms one group of orderly PDW data.And for overlap processing unit 203,
Can be with call driver structure, by the hardware cache of PDW data flow input signal analog modules.
, can be according to the corresponding PDW of radar signal Form generation in signal generation module.Radar signal type of waveform can
To slide varying signal including general pulse signal, frequency agility signal, PRF staggering signal, repetition, it is linear FM signal, non-linear
FM signal, phase-coded signal and composite signal.For example, repetition dither signal is to keep constant on frequency domain, pulsewidth is consistent,
The signal of repetition period random jump within the specific limits.Repetition dither signal is divided into arteries and veins jitter and the shake of arteries and veins group.Trembled between arteries and veins
Dynamic is value repetition period randomized jitter between each pulse.And the shake of arteries and veins group refers to randomized jitter between a set of pulses (>=2),
And the signal that the pulse group interior holding repetition period is constant.Can be according to the corresponding PDW data flows of radar signal Form generation.
In generation PDW data flows, in addition it is also necessary to consider antenna direction figure form.Radar antenna is whole radar and outside
The gateway that space is interknited, is an important component of radar.High frequency oscillation energy produced by emitter, passes through
Antenna is radiated space in the form of an electromagnetic wave, and the echo of target passes through the collection of antenna, is sent to receiver and terminal device
Handled.Therefore some characterisitic parameters of antenna are critically important for a radar, mainly there is operating frequency of antenna, ripple
Beam width and antenna gain etc..Wherein directional diagram is the important parameter of radar antenna, the level except needing to know antenna
Outside beam angle and vertical beam width, the form of directional diagram should be also specifically known, therefore, the embodiment of the present invention can be provided
3 kinds of typical two-dimensional directional figures (Gaussian, longitudinal cosine type and sinc function types) select for user.Antenna axis are deviateed according to target
Angle, azimuth pattern decay factor and pitch orientation figure decay factor can be calculated respectively.
Fig. 3 is the block diagram of signal imitation module provided in an embodiment of the present invention, as shown in figure 3, based on above-described embodiment, institute
Stating signal imitation module includes intermediate frequency analogue unit 301 and radio frequency analog unit 302；The intermediate frequency analogue unit 301 be used for pair
The pulse descriptive word data flow carries out frequency-conversion processing, obtains analog intermediate frequency signal, and by the analog intermediate frequency signal send to
The radio frequency analog unit 302；The radio frequency analog unit 302 is used to carry out upconversion process to the analog intermediate frequency signal,
Radio frequency analog signal is obtained, and the radio frequency analog signal is injected by radar receiver by injection way.
Wherein, radio frequency analog unit 302 mainly completes to carry out analog intermediate frequency signal up-conversion to radiofrequency signal, and works
The frequency ranges such as frequency range covering P, L, C, S and Ka, and be injected into by injection way in radar receiver.
Fig. 4 is the design frame chart of radio frequency analog unit provided in an embodiment of the present invention, as shown in figure 4, female to simulate American Airlines
The main airborne and shipborne radar signal (pattern-band, 230~1000MHz) of battle group is that main syllabus is designated as example to intermediate frequency analogue unit
301 illustrate, but the protection domain not limited to this of the embodiment of the present invention.Emphasis is considered pattern-band (230 by radio frequency analog unit
~1000MHz) design.The design of other frequency ranges is similar to its, can carry out the switching of different frequency range by microwave switch.
Pattern-band up-conversion specific targets are as follows, intermediate-freuqncy signal incoming frequency：75MHz；Radio frequency output frequency：230MHz~1000MHz；
Signal transient bandwidth：50MHz；Gain：30dB±2.5dB；Controllable attenuation：30dB, 1dB stepping；Radio frequency output amplitude：-20dBm
~10dBm；IF input signals dynamic range：- 20dBm~+10dBm；Frequency step：1Hz；Export P-1：≥13dBm；It is spuious
Suppress：≥50dBc；Harmonics restraint：≥50dBc；Mutually make an uproar：≤ -80dBc/Hz@1KHz；Third-order intermodulation product：Power output-
During 10dBm, 50dBc suppresses.
Based on above-described embodiment, the intermediate frequency analogue unit is additionally operable to export pulse carrier frequency code and impulse amplitude code to institute
Radio frequency analog unit is stated to adjust the frequency and amplitude of the radio frequency analog signal.
Based on above-described embodiment, the intermediate frequency analogue unit is additionally operable to：, will be when described default after default sequential condition
Radar type number, pulse carrier frequency code, pulse arrival bearing code and the impulse amplitude code output latched before sequence condition are penetrated to described
Frequency analogue unit.
Fig. 5 is the block diagram that PDW data provided in an embodiment of the present invention generate analog intermediate frequency signal in real time, as shown in figure 5, thunder
Up to intermediate frequency analogue unit hardware system play the part of whole signal imitation module slave role, mainly complete following functions：It is imitative
Before really starting, simulation software (main frame) is transmitted to the PDW data come and is stored in the corresponding address of itself extended menory；Emulation is opened
After beginning, slave works independently under the control for the relevant parameter that main frame is set.Impulse generator in hardware system produces radio frequency
Pulse；PDW other symbol data (radar type number RC, pulse radiation frequency carrier frequency code RF, pulse arrival bearing codes are latched simultaneously
DOA and impulse amplitude control code PA), after certain sequential relationship is met, it is exported together with medium-frequency pulse signal；Simulator
Hardware board exports RF codes and PA codes, the frequency and amplitude of the radiofrequency signal of control Frequency Synthesizes Source generation.
Based on above-described embodiment, the intermediate frequency analogue unit is realized by intermediate frequency data playback card, and the intermediate frequency data is returned
Putting card includes DSP module, FPGA module and DDS module；The DSP module is connected with the signal generation module, for receiving
Data, data outage management and data buffer storage；The FPGA module is connected with the DSP module, for Clock management, logic control
System and interpolation filtering processing；The DDS module is connected with the FPGA module and the DSP module respectively, for for positive intermodulation
System provides digital carrier signal.
Intermediate-freuqncy signal analogue unit can be realized by D/A intermediate frequency datas playback card.The completion pair of D/A intermediate frequency datas playback card
The Digital Up Convert and data readback of baseband signal, generate analog intermediate frequency signal.From the perspective of signal sampling, meet how
On the premise of Qwest's Sampling Theorem, any waveform is all by a digital Sequence composition.Therefore, as long as utilizing corresponding sampling
Point by D/A converter be depicted come, it is possible to reappear a waveform.
Fig. 6 is the block diagram of the embodiment of intermediate frequency analogue unit provided in an embodiment of the present invention, as shown in fig. 6, in producing
The data of frequency analog signal are base band complex sequences data, can derive from storage medium, can also be produced by algorithm.Be converted to unification
Playback apparatus data, then carry out high speed interpolation and orthogonal modulation, so as to can realize that the signal waveform of any baud rate is produced.It is logical
Cross gain control module adjustment output signal level, the carrier frequency of output signal is adjusted by frequency regulation block.Through D/A and
The analog intermediate frequency signal of optional frequency is produced after analog filtering.
Fig. 8 is the block diagram that pci data playback card provided in an embodiment of the present invention realizes logic, and Fig. 9 is the embodiment of the present invention
The block diagram (by taking single channel as an example) of the data readback function implementation of offer, as shown in Figure 8 and Figure 9, specific hardware design
Scheme can use DDS+FPGA+DSP structures, make full use of DDS structures, FPGA structure and DSP architecture in data operation and place
The characteristics of in reason, accomplish have complementary advantages.
Fig. 7 is the hard-wired structural representation of pci data playback card provided in an embodiment of the present invention, as shown in fig. 7, its
Middle DUC and D/A part can use AD9957 chips, and it is integrated with Digital Up Convert and DAC, and sample rate is 1GS/s, while work(
Other direct synthesizers of loss-rate reduce more than 50%, can produce the modulated signal that intermediate-freuqncy signal is 400MHz, and without spuious
Dynamic range reaches 80dB.It has three kinds of mode of operations：Orthogonal modulation pattern, interpolation DAC patterns and single-tone pattern.When it is just
When handing over modulating mode work, one 18bit of IQ two-way time-sharing multiplex parallel data input port a, I datum follows a Q number
According to constantly repetition.
Based on above-described embodiment, the DSP module includes wave generating unit, data buffer storage unit, pci interface and configuration
Control unit；The pci interface is connected with pci bus, the data buffer storage unit and the configuration control unit respectively, its
In, the control module accesses the address space inside the DSP module by the pci interface and added to the DSP module
Load program, and the DSP module access exterior PC I memory spaces by the pci interface；The wave generating unit and institute
State data buffer storage unit to be connected with the FPGA module respectively, for the data acquisition signal ripple sent according to the control module
Shape information, and signal waveform information and data message are sent to the FPGA module to carry out interpolation and filtering process；It is described
Configuration control unit is connected with the DDS module, for the data that are sent according to the control module in the DDS module
Operation carries out interrupt management.
DSP module can select TMSC6416T, and its DSP core dominant frequency reaches 1GHz.In terms of external interface, it has 64
Individual EDMA passages, each passage corresponds to a special synchronous trigger event so that EDMA can be by the next interruption of peripheral hardware, outside
The events such as the interruption that hardware interrupts and other EDMA are transmitted are triggered, and proceed by moving for data.In addition,
In TMS320C6416, a pci interface is added so that DSP parts are easy to be joined seamlessly to a tool by pci interface
Have on the outside host CPU of PCI functions.
Pci interface in TMSC6416T meets PCI2.2 specifications, and it has the master/slave functions of PCI；The ground for supporting 32bit wide
Location and data multiplex bus；Working frequency is up to 33MHz；It is empty that PC main frames can access all addresses inside DSP by pci interface
Between, to DSP loading procedures；DSP also can access exterior PC I memory spaces by the interface.DSP module completion pci interface module,
The functions such as interrupt management, data transfer, and data buffer storage is provided.
Based on above-described embodiment, the FPGA module includes logic control element, address decoding unit, interpolation filtering list
Member, cell fifo and DCM units；The interpolation filtering unit is connected with the DSP module and cell fifo respectively, for institute
The data for stating DSP module transmission carry out high speed interpolation and filtering process, and are sent out the data after processing by the cell fifo
Deliver to the DDS module；The DCM units are connected with the DDS module, for the DDS module provide reference clock with
Carry out Clock management.
FPGA module can select XC5VLX50 chips, and the chip supports 2 step velocitys, is 550Mb/s to the maximum, technical grade is resistance to
Warm (- 40 DEG C~85 DEG C), disclosure satisfy that the demand of the embodiment of the present invention.FPGA module mainly complete Clock management, logic control,
The function such as data transfer and interpolation filtering.
Based on above-described embodiment, the DDS module includes reverse cic filter, half-band filter, cic filter, D/A
Unit, function unit and multiplier unit；The reverse cic filter is connected by the half-band filter and the cic filter
Connect, for constituting interpolation filter to carry out part interpolation functions；The reverse cic filter is used to compensate the CIC filtering
The pass band damping of device, to ensure that there is flat amplitude response in Nyquist Bandwidth；The multiplier unit and the FPGA are mono-
Member connection, for carrying out process of frequency multiplication to reference clock to obtain system clock, the system clock is the work of the DDS module
Make clock.
DDS module provides digital carrier signal SIN/COS for orthogonal modulation, and its work clock is system clock, during system
Clock is obtained by reference clock by process of frequency multiplication.Meanwhile, it also needs to complete part interpolation functions, for example, 4 times of fixed interpolations
Wave filter is formed by 2 half-band filter cascades, and the interpolation multiple of cascade integral comb filter (CIC) is 2-63, therefore, always
Interpolation multiple is 8-252.Inverse cic filters (reverse cic filter) are used for compensating the pass band damping of cic filter,
To ensure to have flat amplitude corresponding in Nyquist Bandwidth.
During analogue system provided in an embodiment of the present invention is realizes that more modulation, different baud rates, level are controllable and any
Frequent rate is adjustable to be required, Hardware platform design is realized using a general, programmable hardware structure by software programming
A variety of functions, using the system hardware that advanced chip is constituted in the industry at present, meet the replay request of following high speed signal, possess
Good scalability.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of Electronic Countermeasures Simulation System, it is characterised in that including signal generation module, the signal generation module is used for root
Pulse descriptive word data flow is generated according to the scenario parameters of reception, and the pulse descriptive word data flow is exported to carry out signal mode
Intend.
2. system according to claim 1, it is characterised in that also include：Control module and signal imitation module；
The control module is used to generate the scenario parameters according to the setting of reception instruction, and sends the scenario parameters to institute
State signal generation module；
The signal imitation module is used for according to the pulse descriptive word data flow received from the signal generation module, simulation
And export radio frequency analog signal.
3. system according to claim 1 or 2, it is characterised in that the signal generation module includes description word cell, mixed
Close sequencing unit and overlap processing unit；
It is described description word cell be used for according to the scenario parameters generate pulse descriptive word, and by the pulse descriptive word send to
The hybrid-sorting unit；
The hybrid-sorting unit was used for according to pulse front edge arrival time, and multiple pulse descriptive words are ranked up, obtained
Pulse descriptive word sequence is taken, and the pulse descriptive word sequence is sent to the overlap processing unit；
The overlap processing unit is used to abandon or merging treatment pulse overlapping in the pulse descriptive word sequence, obtains
The pulse descriptive word data flow is taken, and the pulse descriptive word data flow is sent to the signal imitation module.
4. system according to claim 2, it is characterised in that the signal imitation module includes intermediate frequency analogue unit and penetrated
Frequency analogue unit；
The intermediate frequency analogue unit is used to carry out frequency-conversion processing to the pulse descriptive word data flow, obtains analog intermediate frequency signal,
And send the analog intermediate frequency signal to the radio frequency analog unit；
The radio frequency analog unit is used to carry out upconversion process to the analog intermediate frequency signal, obtains radio frequency analog signal, and
The radio frequency analog signal is injected by radar receiver by injection way.
5. system according to claim 4, it is characterised in that the intermediate frequency analogue unit be additionally operable to pulse carrier frequency code and
Impulse amplitude code exports to the radio frequency analog unit to adjust the frequency and amplitude of the radio frequency analog signal.
6. system according to claim 4, it is characterised in that the intermediate frequency analogue unit is additionally operable to：
After default sequential condition, by the radar type number latched before the default sequential condition, pulse carrier frequency code, pulse
Arrival bearing code and impulse amplitude code are exported to the radio frequency analog unit.
7. the system according to claim 4 or 5, it is characterised in that the intermediate frequency analogue unit is played back by intermediate frequency data
Card realizes that the intermediate frequency data playback card includes DSP module, FPGA module and DDS module；
The DSP module is connected with the signal generation module, for receiving data, data outage management and data buffer storage；
The FPGA module is connected with the DSP module, for the processing of Clock management, logic control and interpolation filtering；
The DDS module is connected with the FPGA module and the DSP module respectively, for providing digital carrier for orthogonal modulation
Signal.
8. system according to claim 7, it is characterised in that the DSP module includes wave generating unit, data buffer storage
Unit, pci interface and configuration control unit；
The pci interface is connected with pci bus, the data buffer storage unit and the configuration control unit respectively, wherein, it is described
Control module accesses address space inside the DSP module and to the DSP module loading procedure by the pci interface,
And the DSP module accesses exterior PC I memory spaces by the pci interface；
The wave generating unit and the data buffer storage unit are connected with the FPGA module respectively, for according to the control
Module send data acquisition signal shape information, and by signal waveform information and data message send to the FPGA module with
Carry out interpolation and filtering process；
The configuration control unit is connected with the DDS module, for the data that are sent according to the control module to the DDS
Operation in module carries out interrupt management.
9. system according to claim 7, it is characterised in that the FPGA module includes logic control element, address and translated
Code unit, interpolation filtering unit, cell fifo and DCM units；
The interpolation filtering unit is connected with the DSP module and cell fifo respectively, for the number sent to the DSP module
According to progress high speed interpolation and filtering process, and the data after processing are sent to the DDS module by the cell fifo；
The DCM units are connected with the DDS module, for carrying out Clock management to DDS module offer reference clock.
10. system according to claim 7, it is characterised in that the DDS module includes reverse cic filter, half band filter
Ripple device, cic filter, D/A units, function unit and multiplier unit；
The reverse cic filter is connected by the half-band filter with the cic filter, for constituting interpolation filter
To carry out part interpolation functions；
The reverse cic filter is used for the pass band damping for compensating the cic filter, to ensure to have in Nyquist Bandwidth
Flat amplitude response；
The multiplier unit is connected with the FPGA unit, for carrying out process of frequency multiplication to reference clock to obtain system clock,
The system clock is the work clock of the DDS module.
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