CN110045343B - Broadband multi-path radar signal comprehensive simulation system and working method thereof - Google Patents
Broadband multi-path radar signal comprehensive simulation system and working method thereof Download PDFInfo
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- CN110045343B CN110045343B CN201910387186.3A CN201910387186A CN110045343B CN 110045343 B CN110045343 B CN 110045343B CN 201910387186 A CN201910387186 A CN 201910387186A CN 110045343 B CN110045343 B CN 110045343B
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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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
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Abstract
The invention discloses a broadband multi-path radar signal comprehensive simulation system and a working method thereof.A waveform is customized in a waveform generator by embedded software, an initial signal frequency is formed, the initial signal frequency is respectively synthesized in two paths of synthesizers after multi-path up-conversion and up-conversion, the signal power is amplified by a broadband power amplifier and is transmitted to an antenna through a transmission line to be radiated. The control equipment controls the host machine to work according to a selected program through computer operation software, can output various radar waveforms in a single path, and can also output radar signals in multiple paths and multiple waveforms. Each path of radar signal is controlled by a switch to output or not, and conditions are provided for sequential emission of combat simulation. The broadband circuit is a multi-path radar signal analog simulation system, each path of radar signal can be provided with waveform, repetition frequency, working frequency and output on-off, the effect is vivid, the practical range is wide, and the problems of comprehensive analog simulation of radar signals and radiation of full-band radio frequency signals in the prior art are effectively solved.
Description
Technical Field
The invention belongs to the field of electronic information engineering, and particularly relates to a broadband multi-channel radar signal comprehensive simulation system and a working method thereof.
Background
In complex electromagnetic environments, radar signals are one of the most important radio signals. The radar signal has wide frequency range, complicated signal waveform, various working modes, large radiation power, intelligent frequency adaptive management and the like. The most important thing for simulating complex electromagnetic environment is to solve the problem of simulating various radar signals, and the core technology of the radar signals is the diversification of waveforms and the rapidity of frequency change. Radar signals are composed of both continuous waves and pulsed waves. The arrangement of pulse wave signals is complex, under a pulse compression system, single carrier frequency, linear frequency modulation, nonlinear frequency modulation, digital coding, even dozens of quantum key coding and the like are combined into a common mode, a PD mode, a CW/FM mode and the like, and the arrangement of pulse groups and repetition frequencies is varied, so that the multiple characteristics of radar signals are caused. In various devices for constructing a simulated electromagnetic environment, solving the comprehensive simulation of radar signals is a difficult problem.
Disclosure of Invention
The purpose of the invention is as follows: the comprehensive simulation system for the broadband multipath radar signals and the working method thereof are provided, and the problems of comprehensive simulation of the radar signals and radiation of full-band radio frequency signals in the prior art are effectively solved.
The technical scheme is as follows: a comprehensive simulation system for broadband multipath radar signals is characterized by comprising: the broadband power amplifier comprises a mode selection module, a waveform generator electrically connected with the mode selection module, a plurality of upper frequency converters electrically connected with the waveform generator, a signal synthesizer electrically connected with the upper frequency converters, a broadband power amplifier electrically connected with the signal synthesizer, a selection switch electrically connected with the broadband power amplifier, and a broadband antenna electrically connected with the selection switch; the mode selection module is in bidirectional communication connection with the selection switch through the comprehensive control system; the waveform generator and the upper frequency converter are connected through frequency source bidirectional communication.
In a further embodiment, the mode selection module, the waveform generator, the up-converter, the signal synthesizer, the wideband power amplifier, and the selection switch form a host; the host computer is in communication connection with the computer in a mode of communication cables and encrypted radio; the mode selection module comprises two modes to be selected, namely a normal mode and an actual combat mode; the waveform generator includes eight options, continuous wave, intra-pulse chirp, non-chirp, coded pulse, PD pattern, pulse group, fixed frequency of repetition frequency, and variable repetition frequency of repetition frequency. In the normal mode, various radar waveforms, repetition frequencies and radar radio frequency frequencies are selected and customized according to the wishes of users, and each path selectively outputs radiation signals; in the actual combat mode, the radar works by simulating the working of a long-range guard, medium-short range guidance, medium-short range fire control, warhead guidance radar and the like to transmit radio frequency radar signals in sequence during the combat.
In a further embodiment, the output band of the up-converter intercepts two of the P-band to the Ku-band and has a band width of ten percent. The wave band has small interference and strong penetrability, and is not easy to be reflected by an ionized layer.
In a further embodiment, the frequency source generates a chirp signal and a frequency hopping signal by a direct digital frequency synthesizer. The direct digital frequency synthesizer comprises a phase accumulator, a sine lookup table electrically connected with the phase accumulator, a digital-to-analog converter electrically connected with the sine lookup table, and a low-pass filter electrically connected with the digital-to-analog converter. Compared with the traditional frequency synthesizer, the direct digital frequency synthesizer has the advantages of low cost, low power consumption, high resolution, quick switching time and the like, and is suitable for the field of radar detection.
A working method of a broadband multipath radar signal comprehensive simulation system is characterized by comprising the following steps:
the method comprises the following steps that firstly, equipment is started, and a comprehensive control system establishes bidirectional communication with a mode selection module and a selection switch;
secondly, the mode selection module is controlled to be started, and the normal mode and the actual combat mode are switched according to the instruction of an operator;
thirdly, the waveform generator is controlled and started by the mode selection module to set parameters including signal setting, repetition frequency setting and working frequency setting;
fourthly, the waveform generator generates a basic radar waveform of 15Mhz, and the basic radar waveform is divided into a plurality of paths of signals by the power divider and is sent to the upper frequency converter;
fifthly, the upper frequency converter mixes the basic radar waveform with the frequency source signal to form each path of radio frequency signal, and the radio frequency signal is sent to a signal synthesizer through each switch;
sixthly, amplifying and synthesizing the radio-frequency signals synthesized by the signal synthesizer into new radio-frequency signals by a high-low broadband power amplifier;
and seventhly, radiating the synthesized new radio frequency signals to the space by the high-low frequency band antenna respectively.
In a further embodiment, the normal mode is an arbitrary radar frequency band opening sequence; the actual combat mode determines that radio frequency signals are opened in sequence and comprises a remote warning P, L waveband, a combat guidance L, S waveband, a fire control radar startup C, X waveband and a warhead seeking guidance Ku waveband. Different wave bands are used according to different functions, interference among the functions is prevented, and operation stability is guaranteed.
In a further embodiment, the signal arrangement comprises both continuous waves and pulsed waves, the pulsed waves comprising both regular pulses and pulse compression, the regular pulses being single carrier frequency pulses, the pulse compression comprising FM and coded pulses; the FM is divided into intra-pulse linear frequency modulation and nonlinear frequency modulation; the signal setting also comprises the selection of the pulse width and the pulse repetition frequency of the pulse wave; the single carrier frequency pulse, the intra-pulse linear frequency modulation, the non-linear frequency modulation and the coding pulse are combined to form a pulse group. Different pulse widths are suitable for a predetermined range of repetition frequencies, otherwise "range ambiguities" may form.
In a further embodiment, the repetition setting comprises a selection of fixed repetition, repetition jitter, and repetition spread; the repetition frequency sets a positive feedback to the pulse wave.
In a further embodiment, the frequency source is a multi-output signal source, and the operating frequency setting may be a fixed frequency or a frequency agile frequency for the frequency source.
Has the advantages that: the invention relates to a comprehensive simulation system of broadband multipath radar signals and a working method thereof, which utilize computer technology to intensively arrange various radar signals and simulate dozens of radar waveforms, wherein the pulse width, the pulse repetition frequency, the pulse grouping and the like can be randomly adjusted and combined, and a 15MHz basic radar signal is formed by modulation and frequency conversion and is distributed to a multipath radar radio frequency signal simulation branch by a multipath power divider. The frequency source is the only coherent source of the device, and is characterized in that the DDS direct frequency synthesis technology is applied to achieve the output of any frequency signal at high speed, and the step frequency change of the DDS provides conditions for high-speed frequency agility in a frequency band. The comprehensive control system realizes intelligent control of selection of radar signals, customization of radar frequency, on-off of each path of radio frequency signals, conversion between normal and actual combat modes and the like. The invention solves the problems of all-round waveform simulation and multi-frequency simulation, the waveform, the working frequency and the repetition frequency of the invention basically cover the technical characteristics of the conventional radar at home and abroad, and conditions are provided for signal analysis, electromagnetic environment detection and training and the like. Meanwhile, the broadband circuit is a multi-path radar signal analog simulation system, and has the characteristics that each path of radar signal can be provided with waveform, repetition frequency, working frequency and output on-off, the effect is vivid, the practical range is wide, and the like.
Drawings
FIG. 1 is a block diagram of the components of the present invention.
Fig. 2 is a schematic diagram of the working process of the present invention.
FIG. 3 is a block diagram of the host of the present invention.
Fig. 4 is a schematic diagram of the operation of the direct digital frequency synthesizer of the present invention.
Fig. 5 is a band information table related to the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the present invention mainly includes a host, an antenna, and a control device (computer). The host is a core component, and the composition is as shown in fig. 3. Various waveforms are customized in a waveform generator by embedded software, initial signal frequency is formed, the initial signal frequency is synthesized in two paths of synthesizers after multi-path up-conversion and up-conversion, the signals are amplified by a broadband power amplifier, and the signals are transmitted to an antenna through a transmission line to be radiated. The control equipment controls the host machine to work according to a selected program through computer operation software, can output various radar waveforms in a single path, and can also output radar signals in multiple paths and multiple waveforms. Each path of radar signal is controlled by a switch to output or not, and conditions are provided for sequential emission of combat simulation. The output requirement of the signal is configured by the computer, and various radar basic waveforms are generated in the host for output selection. The up converter raises the frequency of the basic radar signal to the working frequency of the typical radar, and then the power amplifier amplifies the power, and the signal is sent to the high and low transmitting antennas through the high and low paths of the combiner to radiate the signal to the air, so as to provide conditions for the training of the detection equipment. The invention can simulate 16 radar frequencies and various radar waveforms, basically covers the signal mode of the current main warfare radar, and can respectively add various interference information according to requirements to construct a realistic radar electromagnetic environment with home. The invention sets a simple combat mode by using software, sets the starting sequence of different forms of radars according to the remote early warning-medium remote warning-guiding process, and has certain battlefield situation significance. Meanwhile, the system has small transmitting power, the antenna has a directional radiation function, and the normal work of other electronic equipment is not influenced.
As shown in fig. 2, the present invention includes a mode selection module, a waveform generator, an up-converter, a signal synthesizer, a wideband power amplifier, a selection switch, a wideband antenna, a comprehensive control system, and a frequency source. The waveform generator is electrically connected with the mode selection module, the up converter has multiple paths and is electrically connected with the waveform generator, the signal synthesizer is electrically connected with the up converter, the broadband power amplifier is electrically connected with the signal synthesizer, the selection switch is electrically connected with the broadband power amplifier, the broadband antenna is electrically connected with the selection switch, and the mode selection module and the selection switch are in bidirectional communication connection through a comprehensive control system; the waveform generator and the upper frequency converter are connected through frequency source bidirectional communication.
As a preferred scheme, the mode selection module, the waveform generator, the up-converter, the signal synthesizer, the broadband power amplifier and the selection switch form a host; the host computer is in communication connection with the computer in a mode of communication cables and encrypted radio; the mode selection module comprises two modes to be selected, namely a normal mode and an actual combat mode; the waveform generator includes eight options, continuous wave, intra-pulse chirp, non-chirp, coded pulse, PD pattern, pulse group, fixed frequency of repetition frequency, and variable repetition frequency of repetition frequency.
As a preferred scheme, two sections of a P waveband and a Ku waveband are intercepted from an output waveband of the upper frequency converter, and the bandwidth of the frequency band is ten percent; the frequency source generates a chirp signal and a frequency hopping signal through a direct digital frequency synthesizer. The direct digital frequency synthesizer comprises a phase accumulator, a sine lookup table electrically connected with the phase accumulator, a digital-to-analog converter electrically connected with the sine lookup table, and a low-pass filter electrically connected with the digital-to-analog converter.
The working process of the present invention is specifically described below:
the invention relates to a two-section broadband radar signal analog simulation system from a P wave band to a KU wave band. And after the equipment is started, the comprehensive control system outputs a control signal. Firstly, selecting a radar signal simulation mode, namely a 'normal/actual combat' mode, wherein the 'actual combat mode' determines that a radio frequency signal is sequentially turned on, namely a remote warning P, L, a combat guidance L, S, a fire control radar startup C, X and a guidance Ku for warhead searching; the "normal mode" is an arbitrary radar frequency band opening sequence. And when the machine works normally, parameter binding is required. Firstly, parameter setting is carried out on a waveform generator, wherein the parameter setting comprises signal setting and repetition frequency setting. The signal is provided with two types of continuous waves and pulse waves. The pulse wave has two types of conventional pulse and pulse compression, the conventional pulse is a single-carrier frequency pulse, and the pulse compression is divided into a plurality of types of FM (LFM/NLFM) and coded pulse (biphase code and quadriphase code); the FM is classified into intra-pulse linear frequency modulation and nonlinear frequency modulation. Pulse selection also includes selection of pulse widths, pulse repetition frequencies, different pulse widths being appropriate for a range of repetition frequencies that would otherwise form a "range ambiguity". The 'repetition frequency setting' can select 'fixed repetition frequency', 'repetition frequency jitter', 'repetition frequency staggered difference' according to the requirement. The "pulse group" is selected such that the various pulses can be combined arbitrarily to form a combined pulse. The "PD mode" is a high repetition frequency doppler detection mode. After the signal waveform is determined, the basic radar waveform of 15MHz is up-converted, and the signal waveform is divided into a plurality of paths of signals by a power divider and sent to each path of up-converter. The up converter mixes the basic radar waveform with the 'frequency source' signal to form each path of radio frequency signal, and the radio frequency signal is sent to the synthesizer through each switch. P, L, S are mixed into low-frequency branches, C, X, Ku is mixed into high-frequency branches, and the high-frequency branches and the low-frequency branches are amplified and synthesized into radio-frequency signals by high-low broadband power amplifiers respectively. The synthesized radio frequency signals are radiated to the space by the high-low frequency band antenna respectively. The working frequency setting can be fixed frequency aiming at the frequency source, and can also be frequency agility, and the frequency source is a multi-channel output signal source.
More specifically, "mode selection" generally refers to "normal mode" and "actual fighting mode". In the normal mode, various radar waveforms, repetition frequencies and radar radio frequency frequencies are selected and customized according to the user intention, and each path selectively outputs radiation signals; in the actual combat mode, the radar works by simulating the working of the warfare radar to emit radio frequency radar signals in sequence such as long-range warning, medium-short range guiding, medium-short range fire control, warhead guidance radar and the like. The 'multi-channel frequency conversion' is the sum of the frequencies of all conventional radars. According to the international radio frequency division, there are dozens of frequency bands respectively determined as 'radio positioning' from HF to Ku wave bands, 20 typical frequency band analog videos are obtained, and the bandwidth of each frequency band is 10%. The signal synthesis combines the signals sent by the multi-path power amplifier into one path and sends the path of the signals to the power amplifier for amplification. Considering the limitation of power amplifier bandwidth and the bandwidth of the radiating antenna, the signal synthesis can be divided into a plurality of sections, and the sections are amplified and output by different broadband power amplifiers and provided for the antennas with different frequency bands to radiate to the space. The 'broadband power amplifier' is a shunt signal power amplifier which is synthesized and sent by signals, and can be one path or multiple paths. The power level is customized as desired. The selection switch is controlled by the integrated control system to selectively switch on/off each path of radio frequency signals. The "broadband antenna" radiates the radio frequency signal sent by the switch to the space. The frequency source is a coherent source of the equipment, adopts a DDS direct frequency synthesis technology, and has the characteristics of fast frequency response, step scanning, multi-frequency point output and the like. The 'comprehensive control system' is an intelligent control center of the equipment, so control selection signals are all sent out by the intelligent control system.
The invention uses computer technology to centrally arrange various radar signals, simulate dozens of radar waveforms, can randomly adjust and combine the pulse width, pulse repetition frequency, pulse grouping and the like, forms 15MHz basic radar signals through modulation and frequency conversion, and is distributed to a plurality of radar radio frequency signal simulation branches by a multipath power divider. The frequency source is the only coherent source of the device, and is characterized in that the DDS direct frequency synthesis technology is applied to achieve the output of any frequency signal at high speed, and the step frequency change of the DDS provides conditions for high-speed frequency agility in a frequency band. Various radio-frequency signals output by a frequency source are respectively mixed with basic radar signals sent by a waveform generator to form radar radio-frequency pulse signals, the radar radio-frequency pulse signals are amplified in power amplifiers of various frequency bands, high-power radio-frequency signals with different frequencies are respectively output, the radar radio-frequency pulse signals are combined into one path by a power combiner, and the radar radio-frequency pulse signals are radiated to the space through a broadband antenna, so that the analog simulation process of the radar radio-frequency signals is completed. The continuous wave radar signal is simulated by directly providing a selected frequency signal by a frequency source and is output by a radio frequency power amplifier. The comprehensive control system realizes intelligent control of selection of radar signals, customization of radar frequency, on-off of each path of radio frequency signals, conversion between normal and actual combat modes and the like.
It should be noted that the frequency source of the present invention generates the chirp signal and the frequency hopping signal by a direct digital frequency synthesizer. The specific working process of the direct digital frequency synthesizer is as follows: the digital waveform forms an analog quantity waveform through a digital-to-analog converter; changing the frequency of the output waveform by changing the clock frequency of the sine lookup table; the frequency of the output signal is changed by changing the addressing step length, the digital waveform passes through a sine lookup table, the increment of the phase is accumulated by a phase accumulator, the digital-to-analog converter outputs a step waveform, the step waveform is converted into an analog waveform meeting the conditions through a low-pass filter, and finally the analog waveform is output.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A working method of a broadband multi-path radar signal comprehensive simulation system is characterized by comprising the following steps:
the comprehensive simulation system for the broadband multipath radar signals comprises:
the broadband power amplifier comprises a mode selection module, a waveform generator electrically connected with the mode selection module, a plurality of upper frequency converters electrically connected with the waveform generator, a signal synthesizer electrically connected with the upper frequency converters, a broadband power amplifier electrically connected with the signal synthesizer, a selection switch electrically connected with the broadband power amplifier, and a broadband antenna electrically connected with the selection switch; the mode selection module is in bidirectional communication connection with the selection switch through the comprehensive control system; the waveform generator and the upper frequency converter are in bidirectional communication connection through a frequency source;
the working method comprises the following steps:
s1, starting the device, and establishing two-way communication between the comprehensive control system and the mode selection module and the selection switch;
s2, the mode selection module is controlled to start, and the mode is switched between a normal mode and an actual combat mode according to the instruction of an operator;
s3, the waveform generator is controlled and started by the mode selection module to set parameters, including signal setting, repetition frequency setting and working frequency setting;
s4, generating a basic radar waveform of 15Mhz by a waveform generator, dividing the basic radar waveform into a plurality of paths of signals by a power divider and sending the signals to an upper frequency converter;
s5, the up-converter mixes the basic radar waveform with the frequency source signal to form each path of radio frequency signal, and the radio frequency signal is sent to the signal synthesizer through each switch;
s6, amplifying and synthesizing the radio frequency signals synthesized by the signal synthesizer into new radio frequency signals by a high-low two-path broadband power amplifier;
and S7, radiating the synthesized new radio frequency signals to the space by the high-low band antenna respectively.
2. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 1, wherein: the mode selection module, the waveform generator, the upper frequency converter, the signal synthesizer, the broadband power amplifier and the selection switch form a host; the host computer is in communication connection with the computer in a mode of communication cables and encrypted radio; the mode selection module comprises two modes to be selected, namely a normal mode and an actual combat mode; the waveform generator includes eight options, continuous wave, intra-pulse chirp, non-chirp, coded pulse, PD pattern, pulse group, fixed frequency of repetition frequency, and variable repetition frequency of repetition frequency.
3. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 1, wherein: the output waveband of the upper frequency converter intercepts two sections from the P waveband to the Ku waveband, and the bandwidth of the waveband is ten percent.
4. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 1, wherein: the frequency source generates a chirp signal and a frequency hopping signal through a direct digital frequency synthesizer.
5. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 4, wherein: the direct digital frequency synthesizer comprises a phase accumulator, a sine lookup table electrically connected with the phase accumulator, a digital-to-analog converter electrically connected with the sine lookup table, and a low-pass filter electrically connected with the digital-to-analog converter.
6. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 1, wherein: the normal mode is the opening sequence of the radar frequency band which is set arbitrarily; the actual combat mode determines that radio frequency signals are opened in sequence and comprises a remote warning P, L waveband, a combat guidance L, S waveband, a fire control radar startup C, X waveband and a warhead seeking guidance Ku waveband.
7. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 1, wherein: the signal setting comprises two types of continuous waves and pulse waves, wherein the pulse waves comprise two types of conventional pulses and pulse compression, the conventional pulses are single carrier frequency pulses, and the pulse compression comprises FM and encoding pulses; the FM is divided into intra-pulse linear frequency modulation and nonlinear frequency modulation; the signal setting also comprises the selection of the pulse width and the pulse repetition frequency of the pulse wave; the single carrier frequency pulse, the intra-pulse linear frequency modulation, the non-linear frequency modulation and the coding pulse are combined to form a pulse group.
8. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 7, wherein: the repetition frequency setting comprises selection of fixed repetition frequency, repetition frequency jitter and repetition frequency spread; the repetition frequency sets a positive feedback to the pulse wave.
9. The operating method of the broadband multi-path radar signal comprehensive simulation system according to claim 1, wherein: the frequency source is a multi-channel output signal source, and the working frequency setting can be fixed frequency or frequency agility aiming at the frequency source.
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| CN109581321A (en) * | 2019-01-25 | 2019-04-05 | 南京大学 | A kind of more waveform signals of radar that can flexibly load parameter generate and apparatus for demonstrating |
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Denomination of invention: A broadband multi-channel radar signal comprehensive simulation system and its working method Effective date of registration: 20211026 Granted publication date: 20200124 Pledgee: Jiangsu Zijin Rural Commercial Bank Co.,Ltd. Gulou sub branch Pledgor: NANJING XINPINDIAN ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2021980011321 |