Binary channels master's passive radar comprehensive simulation device
Technical field
The present invention relates to the radar test technical field, specifically is a kind of binary channels master's passive radar comprehensive simulation device.
Background technology
Main passive radar comprehensive simulation device is the laboratory and the on-the-spot test equipment of the passive compound system radar precise guidance of equipment master system; Can search for and each item function and performance technologies index tests such as tracking accuracy, scope and sensitivity main passive compound system radar, be the standard device of the main passive compound system radar important technology index of assessment.Main passive compound system radar test needs radar signal source can produce initiatively radar target signal and passive radar echo signal; The phase information that the active radar simulator can be stored radar; Can simulate the static nature (distance, power etc.) and the behavioral characteristics (variable in distance, Doppler shift etc.) of full phase parameter radar target; Can distance, Doppler and radiation power be set static state, and can simulate the target dynamic characteristic (speed, distance and the Doppler shift etc. that comprise target) of full phase parameter radar.Existing active radar simulator and passive radar simulator be design separately separately mostly, is main with the unit single channel, and wave band is no more than two.
Along with the develop rapidly of information and ECM, the application of main passive compound system radar more and more widely, thereby the radar test technology is had higher requirement, radar test set is developed towards integrated, synthesization and networked direction.
Radio frequency storage (DRFM) technology is through storage, processing and transmit the radar emission signal; Use at aspects such as electronic countermeasure, coherent radar target simulation and undesired signal simulations more and more wider, so the DRFM technology becomes one of gordian technique that realizes coherent system radar simulators such as pulse Doppler.
DDS (digital frequency synthesizer) can produce signals such as frequency modulation, phase modulation and single carrier frequency flexibly; And interface rate constantly increases; Quick frequency conversion ability and the multi-form signal of utilization DDS produce ability, in conjunction with microwave technology, DSP (digital signal processing) technology and complex logic generating technique, can realize the Radar emitter simulator (passive radar simulator) of big frequency range, many systems and great dynamic range; And can realize the multi-section radar simulation, generate controlled electromagnetic environment.
Network technology has characteristics such as transmission speed height, reliability height; Can be when measuring system constructing with different subsets through network interconnection; IP address of each devices allocation, equipment room with always control communicating by letter and controlling between platform and will become convenient, and number of devices can flexible expansion.
Merge coherent radar target simulation technology, many systems general radar signal simulation technology, network technology and microwave technology; Can realize that a kind of is interconnection mode with the network; Can produce the coherent radar target simulation signal of two passages and binary channels master's passive radar comprehensive simulation device of passive radar radiation source simulating signal simultaneously, this simulator can be used for the initiatively emulation and the test of coherent system radar, passive radar and main passive compound system radar.
Summary of the invention
In order to satisfy the laboratory and the on-the-spot test demand of the passive compound system radar precise guidance of equipment master system; Main passive compound system radar is searched for and each item function and performance technologies index tests such as tracking accuracy, scope and sensitivity; The important technology index of the main passive compound system radar of assessment; Overcome the decoy simulation of single channel coherent signal source and drag the limitation of drawing the interference realization; Simultaneously in order to satisfy the testing requirement of main passive compound system radar; The present invention provides a kind of binary channels master's passive radar comprehensive simulation device; This simulator is through binary channels coherent target simulation, many systems general radar signal simulation, main passive Collaborative Control and network information transfer, and this simulator can be realized unit coverage double passage initiatively simulator and passive simulation device, satisfies multiple coherent radar, passive radar fully and leads function and testing performance index requirement under laboratory and the field condition of passive composite radar.
Particularly, binary channels master's passive radar comprehensive simulation device according to the present invention comprises: binary channels is radar simulator initiatively, and it produces two-way triband radio frequency radar simulation signal initiatively independently mutually; The passive radar simulator, it produces the radio frequency passive radar simulating signal of 0.8-18Ghz; Signal synthesizing module, any during its two-way that said active radar simulator independently export, perhaps was synthesized to signal that said passive radar simulator produces is exported or two; And Comprehensive Control platform; Itself and said active radar simulator, said passive radar simulator and said signal synthesizing module communicate, and are used to carry out coordination and upper control between said active radar simulator, said passive radar simulator and the said signal synthesizing module.
In a preferred embodiment; Said binary channels initiatively radar simulator further comprises Receiver Module, frequency measurement module, two-way radio frequency memory module, two-way radio frequency sending module and signal Processing and control module; Wherein, Receiver Module receives the radio-frequency input signals of triband and these signals is carried out down-converted, and the radiofrequency signal of frequency measurement module after to down coversion carried out frequency measurement, and the frequency measurement result delivers to the tracking frequencies source with Parallel Digital sign indicating number form and generates the frequency conversion local oscillator; Deliver to signal Processing and control module simultaneously, be used for calculating Doppler frequency in real time according to the speed that is provided with; And wherein; Two-way radio frequency memory module receives the intermediate-freuqncy signal from Receiver Module; And according to gating pulse output two-way intermediate-freuqncy signal; And two-way radio frequency sending module is handled the two-way intermediate-freuqncy signal of two-way radio frequency memory module output, thereby obtains said two-way triband radio frequency radar simulation signal initiatively independently mutually; And wherein; Signal Processing and control module communicate through network interface and above-mentioned Receiver Module, frequency measurement module, two-way radio frequency memory module and two-way radio frequency sending module; Be used for the receiving target parameter setting information; Calculate Doppler frequency, amplitude and the time parameter of simulated target in real time, and all types of target parameter and the signal source duty in real-time return signal source.
In preferred embodiment, said passive radar simulator comprises digital signal processor, sequence generation module, prompt source module, modulation source module and the amplitude control module of becoming; Wherein, Digital signal processor is provided with information through the passive simulation device that network interface receives host computer; Calculate the parameter of guinea pig in real time; And control other module work, and sequence generation module produces the variable pulse-modulated signal of repetition according to the control of digital signal processor, and victory change source module is controlled to produce set specific frequency signal and this signal is carried out victory according to sequence generation module and is become processing; The modulation source module produces single-frequency, frequency modulation or phase-modulated signal according to the control figure frequency synthesizer is set; And become the radiofrequency signal that the source mixing obtains 0.8-18Ghz with victory, and the amplitude control module is according to being provided with the output amplitude control signal that produces the passive radar simulator, and produces the antenna scanning simulating signal.
In preferred embodiment; Said signal synthesizing module comprises mechanical switch and two combiners; Wherein, The radiofrequency signal of the 0.8-18GHz of passive radar simulator output is imported into mechanical switch, and the two-way output of mechanical switch is connected respectively to the input end of two combiners, and another input end of two combiners is connected respectively to the initiatively two-way output of radar simulator.
In preferred embodiment, said Comprehensive Control platform comprises that host computer shows control interface, router, active simulator control module and passive simulation device control module; Wherein, It is the human-computer interaction interface of exploitation under the Windows interface on the industrial computer that host computer shows the control interface; Be used to accomplish the parameter setting and the state demonstration of main passive radar simulator; Initiatively simulator control module and passive simulation device control module receive the parameter that is provided with of active radar simulator and passive radar simulator, and status information is recycled to the apparent control of host computer interface, and initiatively the simulator control module is calculated the initiatively parameter of radar simulator in real time; And all types of target parameter and the signal source duty in real-time return signal source; Passive radar simulator control module is calculated the parameter of passive radar simulator in real time, control modulation source, prompt change source and the collaborative work of amplitude control module, and produce many systems passive radar simulating signal.
In further preferred embodiment; Said Receiver Module is specifically carried out following operations: the radar radiofrequency signal that receives X, Ku and three wave bands of Ka; The Ka wave band is reduced to X-band through down coversion; X-band obtains C-band with the Ku wave band with different local oscillator mixing, and then this C-band is reduced to intermediate frequency through down coversion.
In further preferred embodiment, the radio frequency pulsewidth of said frequency measurement module is minimum 50ns, and the frequency measurement resultant error is in 3MHz.
In further preferred embodiment; Said two-way radio frequency sending module comprises the processing of the two-way intermediate-freuqncy signal of said two-way radio frequency memory module output: the two-way intermediate-freuqncy signal of said two-way radio frequency memory module output is converted to C-band; Add doppler shifted signal; And then up-conversion is to X, Ku or Ka frequency range, and the amplitude of carrying out is amplified and control.
In further preferred embodiment; Said sequence generation module produces the variable pulse-modulated signal of repetition through field programmable gate array; And saidly prompt become that source module is synthetic through prompt parameter word frequency, frequency multiplication, mixing and multiband filtering realizes saidly promptly becoming operation, and the scan type of the antenna scanning simulating signal that produces of said amplitude control module comprises circular scan, conical scanning and spiral scan.
In further preferred embodiment; Said mechanical switch is the microwave mechanical switch of single-pole double-throw (SPDT); And setting according to host computer; The output of arbitrary road or the two-way output of said active radar simulator can independently exported or be synthesized to the signal that said passive radar simulator produces, thereby said binary channels master's passive radar comprehensive simulation device can be tested active radar, passive radar or main passive composite radar respectively.
The present invention is according to the test request of main passive compound system radar; Fully merge coherent radar target simulation technology, many systems general radar signal simulation technology, network technology and microwave technology; Having realized a kind of is mutual contact mode with the network, can produce binary channels master's passive radar comprehensive simulation device of two passage coherent radar target simulation signals and passive radar radiation source simulating signal simultaneously.This simulator has following characteristics and advantage: (1) binary channels coherent signal source, Radar emitter simulator, industrial computer and far control equipment such as platform and carry out network interconnection through router; The main passive radar test network system that formation is made up of subset, the local and long-range radar comprehensive simulation device that can control flexibly; (2) single cover binary channels radar comprehensive simulation device has been realized initiatively coherent radar target simulation and passive radar target simulation, can verify initiatively the acquisition and tracking performance and the antijamming capability of radar, can test active and passive separately again or main passive compound system radar.
In addition; Simulator according to the present invention has that analog functuion is strong, wave band adaptability is strong, easy for operation, highly versatile and characteristics such as power and Frequency Index height; Can satisfy the initiatively emulation and the testing requirement of coherent system radar, passive radar and main passive compound system radar, and in actual engineering, obtain good application.
Description of drawings
Describe preferred implementation of the present invention in conjunction with the drawings, those skilled in the art can understand the present invention more fully, in the accompanying drawing:
Fig. 1 is the functional block diagram according to binary channels master's passive radar comprehensive simulation device of the present invention;
Fig. 2 is the functional block diagram according to the binary channels active radar simulator of comprehensive simulation device of the present invention;
Fig. 3 is the functional block diagram according to the passive radar simulator of comprehensive simulation device of the present invention;
Fig. 4 is the functional block diagram according to the signal synthesizing module of comprehensive simulation device of the present invention;
Fig. 5 is the functional block diagram according to the Comprehensive Control platform of comprehensive simulation device of the present invention.
Embodiment
Description in the face of preferred implementation of the present invention only is exemplary in essence down, is not to be intended to limit invention, its application, or uses.Should be noted that; Although this preferred implementation has disclosed various concrete assembly of the present invention and details; But those skilled in the art are understood that easily protection scope of the present invention is not limited to these assemblies and details, under the situation that does not depart from ultimate principle of the present invention; Those skilled in the art can make modification or be equal to replacement these assemblies and details, and the embodiment after revising or replacing also will fall within protection scope of the present invention.
Like what use among the application, term " module " means following: special IC (ASIC), electronic circuit, combinational logic circuit, field programmable gate array (FPGA), carry out coding processor (shared, special-purpose or in groups), other suitable parts of said function are provided; The perhaps combination of above-mentioned some or all parts.Term " module " can comprise storer (shared, special-purpose or in groups), the coding that said memory stores is carried out by processor.
As shown in Figure 1, binary channels master's passive radar comprehensive simulation device of the present invention comprises binary channels initiatively radar simulator, passive radar simulator, Comprehensive Control platform and signal synthesizing module.Wherein, Binary channels is the radar radiofrequency signal of radar simulator reception X, Ku or Ka wave band initiatively; Amplify with down coversion after carry out coherent again and receive; Two-way sends, and carries out up-conversion and amplification then, and adds and obtain two-way (being A road and B road) triband radio frequency radar target simulation signal-be that output of A triband radio frequency and B triband radio frequency are exported initiatively independently mutually after time-delay, Doppler and the amplitude control information.The passive radar simulator initiatively produces the radio frequency radar emission signal of 0.8-18Ghz; Simulation produces transmitting of different system radars such as frequency modulation, phase modulation, repetition variation and carrier frequency victory change; The amplitude control module (see figure 3) of passive radar simulator can produce the antenna scanning simulating signal, and scan type comprises circular scan, conical scanning and spiral scan etc.The Comprehensive Control platform is carried out following Comprehensive Control operation: parameter setting and the state of accomplishing main passive radar simulator through human-computer interaction interface show; Specifically; Initiatively kinematic parameter, radar parameter and the amplitude scintillation rule etc. of radar simulator are set, radar system, running parameter and the antenna scanning type and the parameter etc. of passive radar simulator are set; Each module sequential in the main passive radar simulator is controlled, made main passive radar simulator according to collaborative work is set; Carry out the radiofrequency signal simulation of main passive radar simulator.Signal synthesizing module is done switch control to the output signal of passive radar simulator, the radiofrequency signal of passive radar simulator output is synthesized to the output of A road or the output of B road of active radar simulator.
Then consult Fig. 2, the figure shows active radar simulator according to comprehensive simulation device of the present invention.As shown in the figure, binary channels of the present invention initiatively radar simulator comprises Receiver Module, frequency measurement module, two-way radio frequency memory module, two-way radio frequency sending module and signal Processing and control module again.Wherein, Receiver Module receives the radar radiofrequency signal of X, Ku and three wave bands of Ka, and the Ka wave band is reduced to X-band through down coversion, and X-band obtains C-band with the Ku wave band with different local oscillator mixing, and then down coversion is reduced to intermediate frequency.The radiofrequency signal (600-1400MHz) of frequency measurement module after to down coversion carried out frequency measurement; The radio frequency pulsewidth of frequency measurement needs 50ns; The frequency measurement resultant error is in 3MHz; The frequency measurement result delivers to the tracking frequencies source with Parallel Digital sign indicating number form and generates the frequency conversion local oscillator, delivers to signal Processing and control module simultaneously, is used for calculating Doppler frequency in real time according to the speed that is provided with.Two-way radio frequency memory module receives the intermediate-freuqncy signal from Receiver Module, exports 2 tunnel intermediate-freuqncy signals-be A road signal and B road signal according to gating pulse.Two-way radio frequency sending module is converted to C-band to 2 tunnel intermediate-freuqncy signals of two-way radio frequency memory module output; Add doppler shifted signal; And then up-conversion is to X, Ku or Ka frequency range; The amplitude of carrying out is amplified and control, thereby obtains binary channels radio frequency output signal-be that the output of A triband radio frequency is exported with B triband radio frequency.Signal Processing and control module communicate through network interface and above-mentioned submodule; Be used for the receiving target parameter setting information; Calculate Doppler frequency, amplitude and the time parameter of simulated target in real time; Wherein target amplitude rises and falls and to meet Markov model or Si Weilin model, and data updating rate is 0.5ms, and signal Processing and control module also all types of target parameter and the signal source duty in real-time return signal source.
Consult Fig. 3 then, the figure shows functional block diagram according to the passive radar simulator of comprehensive simulation device of the present invention.As shown in the figure, this passive radar simulator comprises DSP (digital signal processor), sequence generation module, prompt source module, modulation source module and the amplitude control module of becoming.Wherein, DSP is provided with information through the passive simulation device that network interface receives host computer, calculates the parameters such as pulsewidth, repetition, carrier frequency and amplitude of guinea pig in real time, and controls other module work.Sequence generation module produces the variable pulse-modulated signal of repetition according to the control of DSP, and this realizes through FPGA.Prompt become source module control produces set specific frequency signal according to sequence generation module, and can become DDS, frequency multiplication, mixing and multiband filtering through victory and realize prompt the change.The modulation source module produces single-frequency, frequency modulation or phase-modulated signal according to control DDS is set, and becomes the radiofrequency signal that the source mixing obtains 0.8-18Ghz with victory.The amplitude control module produces the antenna scanning simulating signal according to the output amplitude control signal that produces the passive radar simulator is set, and scan type comprises circular scan, conical scanning and spiral scan etc.
Next consult Fig. 4, the figure shows signal synthesizing module according to comprehensive simulation device of the present invention.As shown in the figure, this signal synthesizing module comprises mechanical switch, combiner A and combiner B.Specifically, the radiofrequency signal of the 0.8-18GHz of passive radar simulator output is imported into mechanical switch, the microwave mechanical switch of single-pole double-throw (SPDT) for example, and the two-way output of mechanical switch is connected respectively to the input end of two combiner A and B.The input other end of two combiner A and B is connected the initiatively A channel output of radar simulator respectively and exports with the B passage.Output to A output or B output according to what being provided with of host computer can be controlled the passive radar simulator, the passive simulation signal can independently be exported or be compound to arbitrary road and initiatively export.Correspondingly; The mode of operation of comprehensive radar simulator of the present invention can be that initiatively radar simulator is independent, the passive radar simulator is independent or the compound three kinds of patterns of main passive radar simulator, thereby respectively to active radar, passive radar or main passive composite radar test.
Consult Fig. 5 at last, the figure shows Comprehensive Control platform according to comprehensive simulation device of the present invention.As shown in the figure, this Comprehensive Control platform comprises that host computer shows control interface, router, active simulator control module and passive simulation device control module.It is the human-computer interaction interface of exploitation under the Windows interface on the industrial computer that host computer shows the control interface, is used to accomplish the parameter setting and the state demonstration of main passive radar simulator.Host computer and slave computer all are connected on the LAN mouth of broadband router through netting twine; Host computer is set to server end; Slave computer is a client; The IP address in host computer, active source and passive source can be provided with arbitrarily in the same network segment, passes through the 100 m ethernet port communications between host computer and 2 slave computers, and agreement is TCP/IP.Initiatively the core of radar simulator control module and passive radar simulator control module is the dsp chip of TI, receives the parameter that is provided with of active and passive radar simulator through Ethernet interface, and status information is recycled to host computer.Initiatively the radar simulator control module is calculated Doppler frequency, amplitude and the time parameter of simulated target in real time; Target amplitude rises and falls and meets Markov model or Si Weilin model; Data updating rate is 0.5ms, and all types of target parameter and the signal source duty in the real-time return signal of active radar simulator control module source.Passive radar simulator control module is calculated the parameters such as frequency, repetition, pulsewidth and amplitude information of passive simulation device in real time, and control modulation source, prompt change source and the collaborative work of amplitude control module produce many systems passive radar simulating signal.
Although described technical scheme of the present invention with reference to preferred implementation; But those skilled in the art are understood that easily; Protection scope of the present invention is not limited to these embodiments; Under the situation that does not depart from ultimate principle of the present invention, can to said embodiment and concrete technical characterictic wherein-for example each module splits, makes up or changes, split, combination or change after technical scheme will fall within protection scope of the present invention.