CN111007463A - Verification and simulation integrated system for radar intermediate frequency signal simulation processing - Google Patents
Verification and simulation integrated system for radar intermediate frequency signal simulation processing Download PDFInfo
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- CN111007463A CN111007463A CN201911355756.7A CN201911355756A CN111007463A CN 111007463 A CN111007463 A CN 111007463A CN 201911355756 A CN201911355756 A CN 201911355756A CN 111007463 A CN111007463 A CN 111007463A
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Abstract
The invention discloses a verification and simulation integrated system for radar intermediate frequency signal simulation processing, which comprises an adjustable simulation processing link and a main control module which are connected with each other, wherein the adjustable simulation processing link comprises a front end conditioning module which is connected in sequence and used for accessing to-be-verified radar intermediate frequency signals or to-be-simulated radar echo signals to perform front end conditioning, an amplitude-frequency characteristic adjusting module used for adjusting the amplitude-frequency characteristic of input intermediate frequency signals, and the amplitude-frequency characteristic adjusting module is controlled to be opened or closed through the main control module and sends control signals to the amplitude-frequency characteristic adjusting module when the amplitude-frequency characteristic adjusting module is opened, so that the verification or simulation of the radar intermediate frequency signal simulation processing is realized. The invention can realize the integration of radar intermediate frequency signal analog processing verification and simulation, and has the advantages of simple and compact structure, low cost, high execution efficiency, strong flexibility and the like.
Description
Technical Field
The invention relates to the technical field of radar signal processing, in particular to a verification and simulation integrated system for radar intermediate-frequency signal simulation processing.
Background
During radar detection, the principle of electromagnetic wave emission and electromagnetic wave reflection by an object is based, azimuth positioning is carried out on the object through the difference between the frequency and the phase of the emitted electromagnetic wave and the reflected electromagnetic wave, because the number of reflectors of the radar electromagnetic wave in a real environment is very large, the reflection path is complicated, an intermediate frequency signal generator and a simulator can only generate echo waveforms with certain specific rules, and the simulated intermediate frequency signal is difficult to consider the characteristics of front-end signals such as radio frequency leakage of a radio frequency front end, and cannot simulate the specific actual scene signal of the radar, so that the difference between the radar parameter obtained by simulation and the detection performance and the actual performance is large, the radar test result is inaccurate, the false-proof effect is poor, and other defects are caused, further simulation processing needs to be carried out on the radar intermediate frequency signal, and the required intermediate frequency signal is obtained.
The intermediate frequency signal analysis method commonly adopted in the prior radar debugging is that data of a full detection section is collected in an outdoor scene for analysis, parameters such as an amplifier, filtering and the like are adjusted according to an analysis result, then modified hardware equipment is used for collecting the data of the outdoor scene again, and the cycle is repeated for many times until the amplitude-frequency characteristic of a radar signal in the full detection section reaches relatively good, the repeated cycle debugging and the collection can generally reach better amplitude-frequency characteristic, but a lot of manpower and material resources are needed to be consumed, the time of the product to market is also influenced, particularly for a medium-distance and long-distance detection radar, and the additional field limitation also often makes the debugging more tortuous.
The actual intermediate frequency echo signal of the radar has a large relationship with the environment, intermediate frequency signals of different distances in different environments and the same environment are all changed, one important function of intermediate frequency signal simulation processing is to connect a bridge of a radar radio frequency front end and a digital processing front end, the signal to noise ratio of a required signal is improved to the maximum extent, the signal to noise ratio of a virtual scene or an unnecessary signal in the environment is weakened, and a proper amplitude-frequency characteristic curve is provided, but the traditional intermediate frequency signal generation system can only generate a single signal in a fixed and full detection distance, so that the requirement of radar intermediate frequency signal simulation processing is difficult to meet; meanwhile, as mentioned above, to realize radar debugging, it is necessary to collect data of a full detection section in an outdoor scene, and multiple times of cyclic debugging and collection are performed until the amplitude-frequency characteristic of a radar signal in the full detection section reaches relatively good, so that the realization operation is complex, the realization cost is high, and the efficiency is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the verification and simulation integrated system for radar intermediate-frequency signal simulation processing, which has the advantages of simple and compact structure, low cost, high execution efficiency and strong flexibility, and can realize the verification and simulation functions of the radar intermediate-frequency signal simulation processing based on the integrated structure.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a verify emulation integration system for radar intermediate frequency signal analog processing, includes interconnect's adjustable analog processing link and host system, adjustable analog processing link is including the front end conditioning module that is used for accessing to wait to verify radar intermediate frequency signal or wait to simulate radar echo signal and carry out the front end conditioning that connects gradually, is used for adjusting the amplitude-frequency characteristic adjusting module of the input intermediate frequency signal amplitude-frequency characteristic, through host system control opens or closes amplitude-frequency characteristic adjusting module and sends control signal when opening for amplitude-frequency characteristic adjusting module to realize the verification or the emulation of radar intermediate frequency signal analog processing.
Further, when the radar intermediate frequency signal analog processing is verified, the master control module controls to open the amplitude-frequency characteristic adjusting module, the radar intermediate frequency signal to be verified is subjected to front end conditioning by the front end conditioning module in sequence, the amplitude-frequency characteristic adjusting module performs gain adjustment and then outputs a processed intermediate frequency signal, and the master control module sends a control signal to the amplitude-frequency characteristic adjusting module to adjust the processed intermediate frequency signal.
Further, when simulation of radar intermediate frequency signal simulation processing is carried out, the master control module controls the amplitude-frequency characteristic adjusting module to be closed, the front end adjusting module collects radar echo signals to carry out front end adjustment to obtain radar signals to be simulated, the master control module controls the amplitude-frequency characteristic adjusting module to be opened, the obtained radar signals to be simulated are provided for the amplitude-frequency characteristic adjusting module to carry out gain adjustment, processed radar signals are output, and control signals are sent to the amplitude-frequency characteristic adjusting module through the master control module to adjust the processed radar signals.
Furthermore, the amplitude-frequency characteristic adjusting module comprises a high-pass filtering unit, an amplifying unit and a low-pass filtering unit which are connected in sequence, the high-pass filtering unit, the amplifying unit and the low-pass filtering unit are respectively connected with the main control module, and the main control module adjusts the cut-off frequency of the filter by controlling the gating or closing of the high-pass filtering unit and the low-pass filtering unit.
Furthermore, the high-pass filtering unit and the low-pass filtering unit adopt multi-order passive filters, and the passive filters form different capacitance values through combination of capacitors to obtain the required cut-off frequency.
Further, the front-end conditioning module is an amplifier module.
Furthermore, the main control module comprises a DAC conversion module for performing digital-to-analog conversion, a controller module and an ADC conversion module for performing analog-to-digital conversion, one end of the controller module is connected to the input end of the amplitude-frequency characteristic adjustment module through the DAC conversion module, and the other end of the main control module is connected to the output end of the amplitude-frequency characteristic adjustment module through the ADC conversion module.
Furthermore, the main control module adopts a single chip microcomputer which comprises a DAC conversion module and an ADC conversion module.
Further, the system also comprises a storage module for data storage, and the storage module is connected with the main control module.
Further, the system also comprises an interaction module used for receiving an external control signal and outputting a verification or simulation result, wherein the interaction module is connected with the main control module.
Compared with the prior art, the invention has the advantages that:
1. the invention discloses a verification and simulation integrated system for radar intermediate frequency signal simulation processing, which is characterized in that a set of integrated system is formed by a main control module and an adjustable simulation processing link, the main control module controls the opening or closing of an amplitude-frequency characteristic adjusting module in the adjustable simulation processing link, different signal processing functions can be realized, when the amplitude-frequency characteristic adjusting module is controlled to be opened, the intermediate frequency signal can be subjected to simulation processing, the verification function of the radar intermediate frequency signal simulation processing is realized, an intermediate frequency signal meeting the requirement is obtained, when the amplitude-frequency characteristic adjusting module is controlled to be closed, a radar echo signal in the actual working environment can be collected through a front end conditioning module for simulation, the simulation function of the radar intermediate frequency signal simulation processing can be realized by combining the amplitude-frequency characteristic adjusting module, and the dual functions of the verification and the simulation of the radar intermediate frequency signal simulation processing can be realized through one, the efficiency of verification simulation implementation is greatly improved, and the implementation cost is reduced.
2. The verification and simulation integrated system for the radar intermediate-frequency signal simulation processing can realize two functions of simulation processing verification of intermediate-frequency echo signals and parameter simulation of simulation processing, can solve the problem that the simulated parameter radar has rough or unusable effect in actual use due to larger difference between a signal of pure theoretical simulation and an actual environment, can greatly reduce operations of radar external field testing, signal debugging and the like, is not limited by an extra field with a medium-long detection distance, and simultaneously reduces the complexity of realizing the operation.
3. When the radar intermediate frequency signal simulation processing is verified, the low-frequency intermediate frequency signal to be verified obtained after the radar signal is subjected to frequency mixing is accessed to the adjustable simulation processing link for simulation processing, the intermediate frequency signal to be verified is subjected to front-end conditioning through the front-end conditioning module and gain adjustment through the amplitude-frequency characteristic adjusting module to obtain the processed intermediate frequency signal, whether the intermediate frequency signal after the simulation processing meets the signal requirement is verified, the simulation processing verification of the radar intermediate frequency signal processing is realized, and meanwhile, the main control module controls and adjusts the parameters of the front-end conditioning module and the amplitude-frequency characteristic adjusting module in the adjustable simulation processing link, so that the required radar intermediate frequency signal can be flexibly generated.
4. The invention is used for the verification and simulation integrated system of the radar intermediate frequency signal simulation processing, when the simulation of the radar intermediate frequency signal simulation processing is carried out, the actual echo signal of the radar during outdoor work is taken as simulation data, the amplitude-frequency characteristic adjusting module is closed, the echo signal in the actual working environment of the radar is collected through the front-end adjusting module, and after the radar signal to be simulated is obtained, then controlling and opening the amplitude-frequency characteristic adjusting module, outputting the processed signal after the simulated radar signal is subjected to gain adjustment by the amplitude-frequency characteristic adjusting module, the parameters of the amplitude-frequency characteristic adjusting module are adjusted to obtain a required amplitude-frequency response curve until a group of relatively optimal intermediate frequency signal processing parameters in the whole detection range are obtained, therefore, the simulation function of radar intermediate frequency signal simulation processing is realized, and the simulation signal processing parameters as good as possible can be conveniently obtained.
Drawings
Fig. 1 is a schematic structural diagram of a verification and simulation integrated system for radar intermediate frequency signal simulation processing according to the present embodiment.
Fig. 2 is a schematic diagram of an implementation principle of implementing a radar intermediate frequency signal analog processing verification function in this embodiment.
Fig. 3 is a schematic diagram of an implementation principle of data acquisition in the implementation of the simulation function of the analog processing in this embodiment.
Fig. 4 is a schematic diagram of an implementation principle of implementing the simulation function of the analog processing in this embodiment.
Illustration of the drawings: 1. an adjustable analog processing link; 11. A front-end conditioning module; 12. an amplitude-frequency characteristic adjusting module; 121. a high-pass filtering unit; 122. an amplifying unit; 123. a low-pass filtering unit; 2. a main control module; 3. a storage module; 4. and an interaction module.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
As shown in fig. 1, the verification and simulation integrated system for radar intermediate frequency signal simulation processing in this embodiment includes an adjustable simulation processing link 1 and a main control module 2 that are connected to each other, where the adjustable simulation processing link 1 includes a front-end conditioning module 11 that is connected in sequence and used for accessing to-be-verified radar intermediate frequency signals or to-be-simulated radar echo signals to perform front-end conditioning, an amplitude-frequency characteristic adjusting module 12 that is used for adjusting amplitude-frequency characteristics of input intermediate frequency signals, and the main control module 2 controls to turn on or off the amplitude-frequency characteristic adjusting module 12 and sends a control signal to the amplitude-frequency characteristic adjusting module 12 when turned on, so as to implement verification or simulation of radar intermediate frequency signal simulation processing.
In the embodiment, a set of integrated system is formed by the main control module 2 and the adjustable analog processing link 1, the main control module 2 controls the opening or closing of the amplitude-frequency characteristic adjusting module 12 in the adjustable analog processing link 1, so as to realize different signal processing functions, when the amplitude-frequency characteristic adjusting module 12 is controlled to be opened, the adjustable analog processing link 1 formed by the front-end conditioning module 11 and the amplitude-frequency characteristic adjusting module 12 can perform analog processing on the intermediate frequency signal, so as to realize the verification function of the analog processing of the intermediate frequency signal of the radar, obtain the intermediate frequency signal meeting the requirements, when the amplitude-frequency characteristic adjusting module 12 is controlled to be closed, the radar echo signal in the actual working environment can be collected by the front-end conditioning module 11 for simulation, and then the analog processing simulation function of the intermediate frequency signal of the radar can be realized by combining the amplitude-frequency characteristic adjusting module 12, so that the dual functions of verification and simulation of the analog processing of, the efficiency of verification simulation implementation is greatly improved, and the implementation cost is reduced.
In this embodiment, when performing the verification of the radar intermediate frequency signal analog processing, the main control module 2 controls to open the amplitude-frequency characteristic adjusting module 12, the radar intermediate frequency signal to be verified is subjected to front-end conditioning by the front-end conditioning module 11 in sequence, the amplitude-frequency characteristic adjusting module 12 performs gain adjustment, and then outputs the processed intermediate frequency signal, and the main control module 2 sends a control signal to the amplitude-frequency characteristic adjusting module 12 to adjust the processed intermediate frequency signal. Specifically, after the gating amplitude-frequency characteristic adjusting module 12 is controlled, a low-frequency intermediate-frequency signal to be verified, which is obtained by frequency mixing of a radar signal, is accessed to the adjustable analog processing link 1 for analog processing, the front-end conditioning of the intermediate-frequency signal to be verified is performed by the front-end conditioning module 11, the gain adjustment of the amplitude-frequency characteristic adjusting module 12 is performed to obtain a processed intermediate-frequency signal, whether the intermediate-frequency signal after analog processing meets the signal requirement is verified, analog processing verification of radar intermediate-frequency signal processing is realized, and meanwhile, parameters of the front-end conditioning module 11 and the amplitude-frequency characteristic adjusting module 12 in the adjustable analog processing link 1 are controlled and adjusted by the main control module 2, so that the required radar intermediate-frequency signal.
In this embodiment, when carrying out the simulation of radar intermediate frequency signal analog processing, earlier close amplitude-frequency characteristic adjusting module 12 by host system 2 control, gather radar echo signal through front end conditioning module 11 and carry out the front end and condition the back, obtain the radar signal of waiting to simulate, again by host system 2 control open amplitude-frequency characteristic adjusting module 12, the radar signal of waiting to simulate that will obtain provides amplitude-frequency characteristic adjusting module 12 and carries out the gain control, output is handled back radar signal, send control signal for amplitude-frequency characteristic adjusting module 12 through host system 2 and handle back radar signal with the adjustment. Specifically, the actual echo signal of the outdoor work of the radar is taken as a simulation element, the amplitude-frequency characteristic adjusting module 12 is closed firstly, the echo signal in the actual working environment of the radar is collected through the front end conditioning module 11, after the radar signal to be simulated is obtained, the amplitude-frequency characteristic adjusting module 12 is controlled to be opened, the radar signal to be simulated is subjected to gain adjustment through the amplitude-frequency characteristic adjusting module 12 and then is output and processed, a required amplitude-frequency response curve is obtained through adjusting the parameters of the amplitude-frequency characteristic adjusting module 12 until a group of relatively optimal intermediate frequency signal processing parameters in the whole detection range are obtained, so that the simulation function of radar intermediate frequency signal simulation processing is realized, and the optimal analog signal processing parameters can be conveniently obtained.
Because there are reflection of the environment object, factors such as attenuation of radar signal of environment and distance in the radar actual intermediate frequency echo signal, it is established, it is difficult for the traditional simulation mode signal of calculation generation to produce these complicated, changeable signals in real time, use data in the radar actual outdoor working environment as simulation data during simulation of this embodiment, the analog signal processing parameter that the simulation generated can be used in the circuit directly, can highly press close to the ability of the actual effect after the product shaping, need not like traditional radar debug intermediate frequency analog signal processing link need many times, carry on outdoor data collection repeatedly, adjustment, can reduce test operation by a wide margin, improve the efficiency of simulation greatly, reduce and realize the cost, the data that the collection obtains can also realize the batch test as the basic signal.
In this embodiment, the front-end conditioning module 11 is specifically an amplifier module, and is configured to amplify an input radar signal to a range required by subsequent analog-to-digital conversion, and an operational amplifier circuit may be used to implement first-stage amplification. In a specific application embodiment, the front-end conditioning module 11 may specifically adopt a low-noise amplifier circuit with a fixed gain of 20dB to perform first-stage amplification on an input radar signal, and a gain of 10 times does not reach ADC saturation input in a general radar system, but can share a gain of 20dB in a front stage in the whole amplification circuit, so as to avoid problems of noise, bandwidth and the like caused by excessive amplification of a first-stage operation, and provide a proper gain in a simulation function to better acquire original data.
In this embodiment, the amplitude-frequency characteristic adjusting module 12 specifically includes a high-pass filtering unit 121, an amplifying unit 122, and a low-pass filtering unit 123, which are connected in sequence, where the high-pass filtering unit 121, the amplifying unit 122, and the low-pass filtering unit 123 are respectively connected to the main control module 2, and the main control module 2 adjusts the cutoff frequency of the filter by controlling the gating or closing of the high-pass filtering unit 121 and the low-pass filtering unit 123. The radar signal detection has the characteristics of low frequency and high signal intensity of a near-distance target echo signal, high frequency and low signal intensity of a long-distance target echo signal, the radar signal is subjected to gain adjustment through the amplitude-frequency characteristic adjusting module 12, the characteristics of the radar can be adapted to provide small gain or even inhibition in a low frequency band, high gain is provided in a high frequency band, and the function of a high-attenuation band-pass filter is realized in a frequency band outside a detection range, in addition, in the amplitude-frequency characteristic adjusting module 12, the two-stage amplifying circuit of the front-end conditioning module 11 and the amplifying unit 122, the filters of the high-pass filtering unit 121 and the low-pass filtering unit 123 are combined, the noise amplitude can be reduced as far as possible, the signal amplification factor outside the detection range is reduced, and the signal-to-noise ratio of a.
In this embodiment, the high-pass filtering unit 121 and the low-pass filtering unit 123 specifically use a multi-order passive filter, the passive filter is composed of a resistor and a capacitor, the cutoff frequency f =, and the higher the order, the steeper the stop band, and the passive filter specifically forms different capacitance values through the combination of capacitors to obtain the required cutoff frequency in this embodiment. Traditional active numerical control filter has defects such as fixed switching frequency noise and "resonance" like switched capacitor filter, is not suitable for the processing of radar intermediate frequency signal sensitive to noise and continuous input signal frequency, and passive filter has simple structure, easily realizes and has advantages such as little influence to in-band phase noise, and this embodiment is handled radar intermediate frequency signal through adopting passive filter, can further improve filtering performance, further reduces the system simultaneously and realizes the complexity.
The high-pass filtering unit 121, the low-pass filtering unit 123 and the amplifying unit 122 all adopt numerical control modules, wherein the numerical control high-pass filter and the numerical control low-pass filter are passive filter structures, and the numerical control passive filter can realize the digital control of the cut-off frequency of the filter on the premise of not increasing additional input noise. The capacitor combination can specifically adopt a single-chip 8-path single-pole single-throw chip ADG715, and the gating and closing of the filter are controlled through the main control module 2 so as to adjust the cut-off frequency of the filter.
The amplifying unit 122 may specifically adopt a digitally controlled VGA (variable gain amplifier), and combines with the first-stage amplification of the front-end conditioning module 11, so that the analog signal verification can provide a wider gain adjustment range, and the verification and simulation requirements of analog processing of various radar intermediate frequency signals are met.
In this embodiment, specifically, the amplification factor of the two-stage amplifier circuit in the adjustable analog processing link 1 and the cutoff frequency of the filter circuit are set, and whether the parameters of each circuit need to be adjusted is determined by observing the obtained real-time signals in the time domain and the frequency domain of the processed intermediate-frequency signal.
In this embodiment, the main control module 2 includes a DAC conversion module 21 for performing digital-to-analog conversion, a controller module 22, and an ADC conversion module 23 for performing analog-to-digital conversion, one end of the controller module 22 is connected to the input end of the amplitude-frequency characteristic adjustment module 12 through the DAC conversion module 21, and the other end of the main control module 2 is connected to the output end of the amplitude-frequency characteristic adjustment module 12 through the ADC conversion module 23. The above-mentioned main control module 2 can specifically adopt the singlechip that contains DAC conversion module, ADC conversion module to realize, if adopt the singlechip controller STM32H750 of internal integration multichannel high speed ADC and DAC peripheral hardware, the controller realizes different resistance-capacitance combinations through the switch of I2C control electric capacity, resistance group, sets for the magnification of amplifier through SPI.
In this embodiment, the device further includes a storage module 3 for storing data, and the storage module 3 is connected to the main control module 2.
In this embodiment, the device further comprises an interaction module 4 for receiving an external control signal and outputting a verification or simulation result, the interaction module 4 is connected with the main control module 2, and conditions such as whether parameters of intermediate frequency analog signal processing are reasonable, whether signals are saturated, whether adjustment is needed and the like can be visually observed through waveform display of the interaction module 4, so that circuit parameter verification is achieved.
In this embodiment, when the above structure is adopted to realize the analog verification function, as shown in fig. 2, the system is controlled to enter the analog verification mode through the interaction module 4, the front-end conditioning module 11, the high-pass filtering unit 121, the amplifying unit 122, and the low-pass filtering unit 123 sequentially form a digitally adjustable analog signal processing link, the radar signal is subjected to frequency mixing to obtain a low-frequency intermediate-frequency signal to be verified, the intermediate-frequency signal to be verified is amplified to a range required by the ADC input end by the front-end conditioning module 11, and then enters the ADC conversion module in the single-chip microcomputer controller after passing through the adjustable analog processing link 1, the main control module 2 sets the cutoff frequencies of the high-pass filtering unit 121 and the low-pass filtering unit 123, and sets the amplification factor of the amplifying unit 122 to form a set of intermediate-frequency parameters for analog processing, and the radar intermediate-frequency signal, The amplitude-frequency characteristic adjusting module 12 composed of the amplifying unit 122 and the low-pass filtering unit 123 performs gain adjustment, outputs the processed intermediate-frequency signal, the ADC of the single chip microcomputer system collects the processed intermediate-frequency signal, the processed intermediate-frequency signal is stored by the storage module 3 and displayed by the interaction module 4, and further, the analog signal can be simultaneously displayed, and whether the processed signal meets the signal requirement is verified by the display result.
In this embodiment, when the above structure is adopted to realize the analog simulation function, as shown in fig. 3 and 4, a radar is erected in an outdoor working area, a target to be measured is ready to move, the system working mode is adjusted to a simulation mode, the amplitude-frequency characteristic adjustment module 12 is turned off, when the target starts to move, acquisition is started, an intermediate-frequency and low-frequency signal after radar frequency mixing passes through the front-end conditioning module 11 and then enters the ADC conversion module of the single-chip microcomputer controller, the ADC conversion module performs analog-to-digital conversion on a signal which is not processed by the amplitude-frequency characteristic adjustment module 12 and then stores the signal in the storage module 3, and simultaneously, signal waveforms of a time domain and a frequency domain are displayed on the interaction module 4, and when the target moves to the farthest position of the radar detection distance, data; the acquired echo signals of the radar in the actual environment are used as input signals for simulation, namely, the acquired actual original data are converted into analog signals through a DAC (digital-to-analog converter) conversion module of a single-chip microcomputer controller and are input to an amplitude-frequency characteristic adjusting module 12, the cut-off frequency of a high-pass filter and a low-pass filter and the gain of an amplifier are controlled by the single-chip microcomputer controller, the signals output by the DAC are subjected to high-pass, amplification and low-pass and then enter an ADC (analog-to-digital converter), the ADC converts the analog signals into digital signals, time domain and frequency domain waveforms processed by the amplitude-frequency characteristic adjusting module 12 are displayed on an interaction module 4 in real time, meanwhile, the filter parameters and amplifier parameters are adjusted according to the signal amplitude, and after multiple automatic parameter adjusting cycles, the system selects an optimal group of.
The embodiment can realize two functions through the system: the simulation processing of intermediate frequency echo signal verifies and the parameter emulation of simulation processing, can solve the signal of pure theoretical simulation and the actual environment difference great and the parameter radar that leads to the emulation is more crude or the unable problem of effect during the in-service use, can reduce the operation of radar external field test, signal debugging etc. again by a wide margin, make not receive the extra place restriction of medium-length detection distance, reduce the complexity that realizes the operation simultaneously, a radar only needs the external field test once can accord with the requirement even, can be applicable to in all kinds of radars in a flexible way.
The radar described above in this embodiment is specifically a millimeter wave radar, and may of course be applied to other systems of radars with similar principles.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. A verification simulation integration system for radar intermediate frequency signal analog processing is characterized in that: the simulation system comprises an adjustable simulation processing link (1) and a main control module (2) which are connected with each other, wherein the adjustable simulation processing link (1) comprises a front-end conditioning module (11) which is used for accessing to-be-verified radar intermediate frequency signals or to-be-simulated radar echo signals to perform front-end conditioning and an amplitude-frequency characteristic adjusting module (12) which is used for adjusting the amplitude-frequency characteristics of input intermediate frequency signals, the front-end conditioning module (11) and the amplitude-frequency characteristic adjusting module (12) are sequentially connected, and the main control module (2) controls the amplitude-frequency characteristic adjusting module (12) to be opened or closed and sends control signals to the amplitude-frequency characteristic adjusting module (12) when the amplitude-frequency characteristic.
2. The integrated verification and simulation system for radar intermediate frequency signal simulation processing according to claim 1, wherein: when the radar intermediate frequency signal simulation processing is verified, the main control module (2) controls to open the amplitude-frequency characteristic adjusting module (12), the radar intermediate frequency signal to be verified is subjected to front end conditioning through the front end conditioning module (11), the amplitude-frequency characteristic adjusting module (12) performs gain adjustment and then outputs a processed intermediate frequency signal, and the main control module (2) sends a control signal to the amplitude-frequency characteristic adjusting module (12) to adjust the processed intermediate frequency signal.
3. The integrated verification and simulation system for radar intermediate frequency signal simulation processing according to claim 1, wherein: when simulation of radar intermediate frequency signal simulation processing is carried out, the main control module (2) controls the amplitude-frequency characteristic adjusting module (12) to be closed, radar echo signals are collected through the front end conditioning module (11) to be subjected to front end conditioning, radar signals to be simulated are obtained, the main control module (2) controls the amplitude-frequency characteristic adjusting module (12) to be opened, the obtained radar signals to be simulated are provided for the amplitude-frequency characteristic adjusting module (12) to be subjected to gain adjustment, processed radar signals are output, and control signals are sent to the amplitude-frequency characteristic adjusting module (12) through the main control module (2) to adjust the processed radar signals.
4. The integrated verification and simulation system for analog processing of radar intermediate frequency signals according to claim 1, 2 or 3, characterized in that: the amplitude-frequency characteristic adjusting module (12) comprises a high-pass filtering unit (121), an amplifying unit (122) and a low-pass filtering unit (123) which are sequentially connected, the high-pass filtering unit (121), the amplifying unit (122) and the low-pass filtering unit (123) are respectively connected with the main control module (2), and the main control module (2) adjusts the cut-off frequency of the filter by controlling the gating or closing of the high-pass filtering unit (121) and the low-pass filtering unit (123).
5. The integrated verification and simulation system for radar intermediate frequency signal simulation processing according to claim 4, wherein: the high-pass filtering unit (121) and the low-pass filtering unit (123) adopt multi-order passive filters, and the passive filters form different capacitance values through combination of capacitors to obtain required cut-off frequency.
6. The integrated verification and simulation system for analog processing of radar intermediate frequency signals according to claim 1, 2 or 3, characterized in that: the front-end conditioning module (11) is an amplifier module.
7. The integrated verification and simulation system for analog processing of radar intermediate frequency signals according to claim 1, 2 or 3, characterized in that: the main control module (2) comprises a DAC conversion module for executing digital-to-analog conversion, a controller module and an ADC conversion module for executing analog-to-digital conversion, one end of the controller module is connected with the input end of the amplitude-frequency characteristic adjusting module (12) through the DAC conversion module, and the other end of the main control module (2) is connected with the output end of the amplitude-frequency characteristic adjusting module (12) through the ADC conversion module.
8. The integrated verification and simulation system for radar intermediate frequency signal simulation processing according to claim 7, wherein: the main control module (2) adopts a singlechip with a DAC conversion module and an ADC conversion module.
9. The integrated verification and simulation system for analog processing of radar intermediate frequency signals according to claim 1, 2 or 3, characterized in that: the data storage system is characterized by further comprising a storage module (3) used for data storage, wherein the storage module (3) is connected with the main control module (2).
10. The integrated verification and simulation system for analog processing of radar intermediate frequency signals according to claim 1, 2 or 3, characterized in that: the device also comprises an interaction module (4) used for receiving an external control signal and outputting a verification or simulation result, wherein the interaction module (4) is connected with the main control module (2).
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| CN113534124B (en) * | 2021-09-15 | 2021-12-28 | 湖南纳雷科技有限公司 | Radar intermediate frequency signal adaptive control system and method |
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| CN111007463B (en) | 2021-07-06 |
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