CN109917362A - The multi-functional incoherent scattering radar system of high sensitivity based on digital antenna array - Google Patents
The multi-functional incoherent scattering radar system of high sensitivity based on digital antenna array Download PDFInfo
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Abstract
The multi-functional incoherent scattering radar system of high sensitivity based on digital antenna array that the present invention provides a kind of；Wherein, which includes aerial array and back-end processing controller；Back-end processing controller is used to generate firing order according to preset emission parameter；Aerial array is used to generate transmitting signal according to firing order, and emits transmitting signal；Aerial array is also used to reception space electromagnetic wave signal, and carries out the first signal processing to spatial electromagnetic wave signal；Back-end processing controller is also used to be handled according to preset operating mode by the spatial electromagnetic wave signal second signal of signal processing；Operating mode includes spatial object tracking mode or ionospheric probing mode.Present invention noise during radar detection is lower, and sensitivity is higher.
Description
Technical field
The present invention relates to Radar Technology fields, multi-functional more particularly, to a kind of high sensitivity based on digital antenna array
Incoherent scattering radar system.
Background technique
Radar (radar) is the electronic equipment using electromagnetic wave detection target.Incoherent scattering radar passes through transmitting Gao Gong
Rate electromagnetic wave receives the Thomson scattering signal of free electron in ionosphere to obtain Ionospheric Parameters.Traditional is incoherent scattered
Penetrate the aerial array of radar generally using transmitting, mechanical scanning mode is concentrated, scanning speed is slower, and the reliability of system compared with
Difference, it is difficult to meet the needs of Ionospheric Parameters long-time continuous probe.The hair of current phased array incoherent scattering radar in the world
Exhibition trend is the electric scanning phased array system using distributed emission, and radar beam conversion speed is fast, and system reliability is high, can be grown
Time continuous service.
Summary of the invention
In view of this, the multi-functional non-phase of high sensitivity that the purpose of the present invention is to provide a kind of based on digital antenna array
Dry scatter radar system improves the reliability of radar system to reduce noise.
In a first aspect, the embodiment of the invention provides a kind of, the high sensitivity based on digital antenna array is multi-functional incoherent
Scatter radar system, including aerial array and back-end processing controller；Back-end processing controller is used to be joined according to preset transmitting
Number generates firing order；Aerial array is used to generate transmitting signal according to firing order, and emits transmitting signal；Aerial array
It is also used to reception space electromagnetic wave signal, and the first signal processing is carried out to spatial electromagnetic wave signal；Back-end processing controller is also
For carrying out second signal processing to by the spatial electromagnetic wave signal of signal processing according to preset operating mode；Working mould
Formula includes spatial object tracking mode or ionospheric probing mode.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein on
Stating aerial array includes multiple submatrixs；Submatrix include set quantity T R component, antenna element and power module；One antenna
Unit and a T R component connect；Power module and T R component connect；T R component be used for the rear end according to radar system at
It manages the firing order that controller is sent and generates transmitting signal, and transmitting pretreatment is carried out to transmitting signal；Antenna element is for sending out
Treated transmitting signal is penetrated, reception space electromagnetic wave signal is also used to；T R component be also used to spatial electromagnetic wave signal into
Row receives pretreatment, and by treated, spatial electromagnetic wave signal is sent to back-end processing controller；Power module is used to be submatrix
Power supply.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides second of first aspect
Possible embodiment, wherein above-mentioned T R component include transmission channel and receiving channel；Transmission channel includes sequentially connected
Waveform generating circuit, the first filtering and amplifying circuit, up-converter circuit, the second filtering and amplifying circuit and circulator；Waveform generates electricity
The firing order that road is used to be sent according to the back-end processing controller of radar system generates transmitting signal, the first filtering and amplifying circuit
It amplifies and is filtered for the power to transmitting signal；Up-converter circuit is used to carry out at the first frequency conversion transmitting signal
Reason；Second filtering and amplifying circuit is for amplifying and being filtered to the transmitting signal after frequency-conversion processing；Circulator is for controlling
System transmitting signal carries out one-way transmission；Receiving channel includes sequentially connected limiter, third filtering and amplifying circuit, down coversion electricity
Road, the 4th filtering and amplifying circuit and data quantization module；Limiter is used to set the amplitude control of spatial electromagnetic wave signal
In range；Third filtering and amplifying circuit is for amplifying and being filtered to the power of spatial electromagnetic wave signal；Down coversion electricity
Road is used to carry out the second frequency-conversion processing to transmitting signal；4th filtering and amplifying circuit is used for the spatial electromagnetic wave after frequency-conversion processing
Signal is amplified and is filtered；Data quantization module is for treated, spatial electromagnetic wave signal to carry out quantification treatment.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the third of first aspect
Possible embodiment, wherein above-mentioned T R component further include polarizer；Polarizer respectively with transmission channel, receiving channel and day
The connection of line unit；Polarizer is used to polarize to transmitting signal or spatial electromagnetic wave signal according to preset polarization direction.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides the 4th kind of first aspect
Possible embodiment, wherein aerial array further includes feed cable, T R component connect by feed cable with power module.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides the 5th kind of first aspect
Possible embodiment, wherein above-mentioned back-end processing controller include including Digital Beam Formation Unit, signal processing unit and
Data processing and display and control unit；Digital Beam Formation Unit respectively with T R component receiving channel and signal processing unit connect；
Digital Beam Formation Unit is used to be formed specified direction wave beam according to the instruction of radar system；Digital Beam Formation Unit and T R
The receiving channel of component is connected by optical fiber；Signal processing unit is set to Digital Beam Formation Unit and data processing and aobvious control
Between unit；Signal processing unit is used to carry out third signal processing to specified direction wave beam according to preset operating mode；Number
It is used to be carried out at fourth signal according to output signal of the preset operating mode to signal processing unit with display and control unit according to processing
Reason；Data processing and display and control unit are also used to receive the running parameter of user's input, and show the running parameter of radar system, work
It include the one or more of work wave, detection airspace and working frequency as parameter.
The 5th kind of possible embodiment with reference to first aspect, the embodiment of the invention provides the 7th kind of first aspect
Possible embodiment, wherein when preset operating mode is spatial object tracking mode, signal processing unit is for default
Space hard goal signal carry out pulse pressure and target detection；Data processing and display and control unit are used for preset target position information
It is read out, tracking filter and display；When preset operating mode be ionospheric probing mode when, signal processing unit for pair
Preset height layer ionization layer signal carries out auto-correlation function calculating, deblurring and spectra calculation；Data processing and aobvious control are single
Member is for extracting and showing to preset ionosphere information.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the 7th kind of first aspect
Possible embodiment, wherein above system further includes frequency synthesizer component；Frequency synthesizer component is set to aerial array and back-end processing control
Between device processed；Frequency synthesizer component is for being monitored the characteristic of aerial array；Characteristic includes transmission channel characteristic, receiving channel spy
One of property and transmission power are a variety of；Above-mentioned frequency synthesizer component is also used to generate local oscillation signal；Up-converter circuit is according to local oscillator
Signal carries out the first frequency-conversion processing to transmitting signal；Lower frequency changer circuit carries out at the second frequency conversion transmitting signal according to local oscillation signal
Reason.
With reference to first aspect, the embodiment of the invention provides the 8th kind of possible embodiments of first aspect, wherein on
The system of stating further includes clock timing module；When clock timing module is used to provide synchronous for aerial array and back-end processing controller
Clock signal.
Second aspect, the highly sensitive radar signal based on digital antenna array that the embodiment of the invention provides a kind of
Method, this method are applied to above system, comprising: back-end processing controller generates firing order according to preset emission parameter；
Aerial array generates transmitting signal according to firing order, and emits transmitting signal.
The embodiment of the present invention bring it is following the utility model has the advantages that
The multi-functional incoherent scattering radar of high sensitivity that the embodiment of the invention provides a kind of based on digital antenna array
System and signal transmitting method；Back-end processing controller generates firing order according to preset emission parameter；Aerial array according to
Firing order generates transmitting signal, and emits transmitting signal；Antenna array receiver spatial electromagnetic wave signal, and to spatial electromagnetic wave
Signal carries out the first signal processing；Back-end processing controller is according to preset operating mode, to the space electricity by signal processing
Magnetostatic wave signal carries out second signal processing.Which noise during radar detection is lower, and sensitivity is higher.
Other features and advantages of the present invention will illustrate in the following description, alternatively, Partial Feature and advantage can be with
Deduce from specification or unambiguously determine, or by implementing above-mentioned technology of the invention it can be learnt that.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, better embodiment is cited below particularly, and match
Appended attached drawing is closed, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of radar system provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of the submatrix of aerial array provided in an embodiment of the present invention；
Fig. 3 is the relation schematic diagram of aerial array provided in an embodiment of the present invention and backend processing unit；
Fig. 4 is the active phased array incoherent scattering radar system provided in an embodiment of the present invention based on total word array
Structural schematic diagram；
Fig. 5 is a kind of structural schematic diagram of the front of aerial array provided in an embodiment of the present invention；
Fig. 6 be T provided in an embodiment of the present invention the signal flow figure that is connect with antenna of R component；
Fig. 7 is a kind of highly sensitive radar signal method based on digital antenna array provided in an embodiment of the present invention
Flow chart.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Incoherent scattering radar obtains ionosphere in the scattered signal faint from ionosphere by emitting high-power electromagnetic wave
Many reference amounts information.Incoherent scattering radar can accurately direct detection almost in the plasma on entire layer height
Electron density, temperature, ingredient, drift velocity (electric field), moreover it is possible to temperature, wind field and the inner magnetosphere of indirect detection neutral backdrop's atmosphere
Heterogeneous body.Incoherent scattering radar has outstanding advantages of measurement parameter is more, detection altitude range is big, is that current ground is visited
The most strong tools in ionosphere are surveyed, atmosphere-ionosphere-magnetosphere system capacity and mass transport and solar wind-magnetosphere are studied
The powerful measure of interaction effect.
In order to detect faint ionospheric scattering signal, signal noise ratio is improved, incoherent scattering radar should have greatly
Transmission power and high-gain to improve echo signal intensity, while reducing system noise temperature again, to reduce reception noise.
The incoherent scattering radar of traditional paraboloid formula can satisfy the requirement of high power and low noise temperature, defect
It is the needs for being difficult to meet the big airspace quick detection in ionosphere.In addition, traditional paraboloid radar is using concentration transmitting recipient
Formula, system reliability are lower, it is difficult to meet the needs of long-time continuous probe.
Based on this, the embodiment of the invention provides a kind of aerial array and radar systems, can be applied to phased-array radar
Field.
To be carried out first to a kind of aerial array disclosed in the embodiment of the present invention detailed convenient for understanding the present embodiment
It is thin to introduce.
A kind of multi-functional incoherent scattering radar system of high sensitivity based on digital antenna array shown in Figure 1
Structural schematic diagram；The system includes aerial array 10 and back-end processing controller 20；Back-end processing controller 20 is used for according to pre-
If emission parameter, generate firing order；Aerial array 10 is used to generate transmitting signal according to firing order, and emits transmitting letter
Number；Aerial array 10 is also used to reception space electromagnetic wave signal, and carries out the first signal processing to spatial electromagnetic wave signal；Rear end
Processing controller 20 is also used to according to preset operating mode, carries out the second letter to the spatial electromagnetic wave signal by signal processing
Number processing；Operating mode includes spatial object tracking mode or ionospheric probing mode.
Above-mentioned aerial array includes multiple submatrixs；The submatrix include set quantity T R (Transmitter and
Receiver, transmitter and receiver) component 10, antenna element 11 and power module 12, with comprising four T R component (first
T R component 10a, the 2nd T R component 10b, the 3rd T R component 10c and the 4th T R component 10d) and four antenna elements (first
Antenna element 11a, the second antenna element 11b, third antenna unit 11c and the 4th antenna element 11d) submatrix for, knot
Structure schematic diagram is as shown in Figure 2.In a submatrix, an antenna element is connect with a T R component；Power module and T R group
Part connection；T R component be used to carry out the first signal processing to the transmitting signal that the back-end processing controller of radar system is sent；It
Line unit is also used to reception space electromagnetic wave signal for emitting treated transmitting signal；T R component be also used to space
Electromagnetic wave signal carries out second signal processing, and by treated, spatial electromagnetic wave signal is sent to back-end processing controller；Power supply
Module is used to power for the submatrix.
Above-mentioned antenna element can be usually said antenna；Antenna is a kind of converter, it on transmission line propagating
Guided wave is transformed into the electromagnetic wave propagated in unbounded medium (usually free space), or carries out opposite transformation；Generally
Antenna all has invertibity, i.e., both can be used as transmitting antenna with common antenna, it is also possible to make receiving antenna.The same antenna is as hair
It penetrates or received fundamental characteristics parameter is identical.Above-mentioned antenna element is to have reversible antenna, transmitting can be believed
Number being converted into electromagnetic wave is sent；Also it can receive spatial electromagnetic wave signal, converted manageable electric signal.
Specifically, T the transmission channel of R (transmitting receiving unit) component include sequentially connected Waveform generating circuit, the
One filtering and amplifying circuit, up-converter circuit, the second filtering and amplifying circuit and circulator；Waveform generating circuit is used for according to radar system
The firing order that the back-end processing controller of system is sent generates transmitting signal, and the first filtering and amplifying circuit is used for transmitting signal
Power is amplified and is filtered；Up-converter circuit is used to carry out the first frequency-conversion processing to transmitting signal；Second amplification filtering
Circuit is for amplifying and being filtered to the transmitting signal after frequency-conversion processing；First annular device for control transmitting signal into
Row one-way transmission.
T the receiving channel of R component include sequentially connected limiter, third filtering and amplifying circuit, lower frequency changer circuit,
Four filtering and amplifying circuits and data quantization module；Limiter is used to control the amplitude of spatial electromagnetic wave signal in setting range
It is interior；Third filtering and amplifying circuit is for amplifying and being filtered to the power of spatial electromagnetic wave signal；Lower frequency changer circuit is used
In to transmitting signal the second frequency-conversion processing of progress；4th filtering and amplifying circuit is used for the spatial electromagnetic wave signal after frequency-conversion processing
It amplifies and is filtered；Data quantization module is used for the spatial electromagnetic wave signal to treated and carries out quantification treatment.
Specifically, polarizer can control the device of the polarization direction of antenna transmitting signal, select consistent with preset polarization direction
Polarized version, and inhibit the polarized wave of other patterns, to obtain polarization matching, realize optimum reception.
Above-mentioned aerial array further includes feed cable, T R component connected by feed cable power module.Above-mentioned power supply list
Member can be multiple power supplys identical with T R component count, or a power supply, while being each T R group in submatrix
Part power supply；Further, corresponding to T R component two channels, above-mentioned power supply unit can also include emission power and reception
Power supply；Emission power and T the transmission channel of R component connect, for powering for transmission channel；Receive power supply and T R component connect
Channel connection is received, for powering for receiving channel.
Above-mentioned back-end processing controller includes that Digital Beam Formation Unit, signal processing unit and data processing and aobvious control are single
Member；Digital Beam Formation Unit respectively with T R component receiving channel and signal processing unit connect；Digital Beam Formation Unit
Specified direction wave beam is formed for the instruction according to radar system；Digital Beam Formation Unit and T R component receiving channel it is logical
Cross optical fiber connection；Signal processing unit is set between Digital Beam Formation Unit and data processing and display and control unit；At signal
Unit is managed to be used to carry out third signal processing to specified direction wave beam according to preset operating mode；Operating mode includes space mesh
Mark is with comprehensive mode and ionospheric probing mode；Data processing and display and control unit are used for according to preset operating mode to signal processing
The output signal of unit carries out fourth signal processing；The work that data processing and display and control unit are also used to receive user's input is joined
Number, and show the running parameter of radar system, running parameter includes work wave, the one kind or more for detecting airspace and working frequency
Kind.
When preset operating mode be extraterrestrial target with comprehensive mode when, signal processing unit is for preset space hard goal
Signal carries out pulse pressure and target detection；Data processing and display and control unit for being read out to preset target position information, with
Comprehensive filtering and display；When preset operating mode is ionospheric probing mode, signal processing unit is used for preset height
Layer ionization layer signal carries out auto-correlation function calculating, deblurring and spectra calculation；Data processing is used for display and control unit to pre-
If ionosphere information extract and show.
Above system further includes frequency synthesizer component；Frequency synthesizer component is set between aerial array and back-end processing controller, can
Prison school network and local oscillator network are formed with Secondary RADAR System；During realizing prison school network, frequency synthesizer component is used for day
The characteristic of linear array is monitored；Characteristic includes one of transmission channel characteristic, receiving channel characteristic and transmission power or more
Kind；It supervises school network and completes each channel amplitude phase difference measurement, cooperate other subsystems to complete the channel amplitude phase difference opposite sex and mend
It repays and corrects, prison school network is also able to cooperate the functions such as the measurement of completion system lobe features and system emission power real-time monitoring.
During realizing local oscillator network, above-mentioned frequency synthesizer component is also used to generate local oscillation signal；Up-converter circuit according to
Local oscillation signal carries out the first frequency-conversion processing to transmitting signal；Lower frequency changer circuit carries out second to transmitting signal according to local oscillation signal and becomes
Frequency is handled.Local oscillator network provides unified local oscillation signal for full machine, and the function of Up/Down Conversion is realized for each transmitting receiving unit, should
Function ensures that system is coherent radar system.
In addition, above system further includes clock timing module；Clock timing module is used to be aerial array and back-end processing
Controller provides synchronizing clock signals, forms clock network.Clock network provides synchronizing clock signals for each subsystem equipment, really
Protect the synchronism of each equipment work pace.
The multi-functional incoherent scattering radar of high sensitivity that the embodiment of the invention provides a kind of based on digital antenna array
System；Back-end processing controller is used to generate firing order according to preset emission parameter；Aerial array according to transmitting for referring to
It enables and generates transmitting signal, and emit transmitting signal；Aerial array is also used to reception space electromagnetic wave signal, and to spatial electromagnetic wave
Signal carries out the first signal processing；Back-end processing controller is also used to according to preset operating mode, to by signal processing
Spatial electromagnetic wave signal carries out second signal processing；Operating mode includes spatial object tracking mode or ionospheric probing mode.
Which noise during radar detection is lower, and sensitivity is higher.
The embodiment of the invention also provides another radar system, realized in system system-based shown in Fig. 1；It should
System includes aerial array, back-end processing controller, aerial array and backend processing unit (being equivalent to back-end processing controller)
Relation schematic diagram it is as shown in Figure 3；Wherein backend processing unit further includes Digital Beam Formation Unit 21 and signal processing unit
22, data processing and display and control unit 23；Wherein, Digital Beam Formation Unit respectively with T R component receiving channel and signal at
Manage unit connection；Signal processing unit is set between numerical value beam forming unit and data processing and display and control unit；Wherein, should
Display terminal is connect with back-end processing controller；The digital beam froming module respectively with T R component receiving channel and rear end
Processing controller connection；Signal processing module is set between numerical value Wave beam forming module and back-end processing controller.
Above-mentioned Digital Beam Formation Unit is used to be formed specified direction wave beam according to the instruction of radar control unit；Digital wave
The all or part of channel echo data of beam receiving antenna array (i.e. by T R component treated spatial electromagnetic wave signal),
Several roads work wave beams (each wave beam can contain there are three working frequency points) is formed by system command, the direction of the wave beam is referred to by control
It enables and is directed toward specified angle.Meanwhile the unit has front and receives monitoring, Ro-vibrational population in the case where demarcating test job state
Calibration calculating, data-transformation facility, auxiliary are completed to receive projects Wave beam forming and the data such as lobe test, directional sensitivity calibration
Processing.Above-mentioned Digital Beam Formation Unit and T the receiving channel of R component connect by optical fiber；
Above system further includes signal processing unit；Signal processing unit receives the specified of Digital Beam Formation Unit transmission
It is directed toward wave beam, deblurring processing, spectra calculation and multi-beam original signal relevant calculation are carried out to the wave beam.
In addition, above system can also include monitoring network in order to which the performance to above-mentioned radar system is monitored；Monitoring
Network settings are between aerial array and back-end processing controller；Monitoring network is for being monitored the characteristic of aerial array；
The characteristic includes one of transmission channel characteristic, receiving channel characteristic and transmission power or a variety of.
The embodiment of the present invention improves the functional reliability of radar using distributed transmitting-receiving subassembly；Using transmitting and receive
Component is digitized, electric scanning wave beam flexibility and changeability is able to achieve while emitting, receives multi-beam；Scanning speed is fast, it can be achieved that more
Kind mode of operation, spatial and temporal resolution are high.
The active phased array incoherent scattering radar system based on total word array that the embodiment of the invention also provides a kind of,
Its structural schematic diagram is as shown in figure 4, the system includes the aerial array of spatial electromagnetic wave for transmitting and receiving；For generate and
Amplification transmitting signal and to echo-signal carry out received digital T R component；It is used to form the digital multiple beam for receiving wave beam
Formation system；Complete multi-beam original signal correlation, the signal processing system of deblurring and spectra calculation；Finishing man-machine interaction
The radar control of function and video data terminal and with system channel characteristic monitoring and transmission power monitoring function monitoring
Subsystem.
Above-mentioned digital T R component and antenna element it is direct-connected, reduce transmitting and receive loss；And each antenna element is corresponding
One T/R component.In the specific implementation process, above-mentioned aerial array can be made of 128 submatrixs, and structural schematic diagram is as schemed
Shown in 5；The submatrix quantity that entire antenna array includes can also adjust as needed.Each submatrix by 8x4=32 antenna element,
32 T the composition such as R (Transmitter and Receiver) component, power supply unit and power splitter.1 antenna element and 1
A T the connection of R component, entire antenna array have 4096 antenna elements and 4096 T R component, each T/R component emission peak
Peak power about 2Mw is penetrated in power 0.5kw, entire big paroxysm.
T the signal flow figure that is connect with antenna of R component as shown in fig. 6, the spatial electromagnetic wave received by polarizer and
Circulator enters receiving channel, and successively by isolation clipping low noise amplifier, second filter, down coversion, (this is frequently
500MHz), after the processing of the second filtering and amplifying circuit, into digital receiver (intermediate frequency 60MHz)；When emitting radar signal, warp
By the Waveform generating circuit (intermediate frequency 60MHz), the first filtering and amplifying circuit, up-conversion (this is 500MHz frequently) of transmission channel,
It after one filter, power amplifier processing, handles using circulator, radar signal is gone out (signal by antenna
440MHz)；Meanwhile monitoring network detects the signal parameter for receiving and emitting.
Antenna element uses orthogonal dipole antennas, emits right-handed circular polarization wave, receives left-hand circular polarization wave, reduces polarization
Loss.Launching centre frequency 440MHz.Antenna element is used for space radiated electromagnetic wave signal when transmitting, for receiving when reception
The spatial electromagnetic wave signal returned from target, completes the conversion of spatial electromagnetic wave and guided electromagnetic wave.
When transmitting, T R component by optical fiber receive radar control instruction, complete center frequency point be 60MHz pumping signal,
Pumping signal is mixed with 500 ± 10MHz local oscillation signal, obtains the transmitting signal of 440 ± 10MHz, by filtering and amplifying etc.
Reason, is conveyed to antenna element by polarization coupler.When reception, T R component receive the electromagnetic wave signal sent back to from antenna element,
By the processing such as amplification, filtering and lower mixing, sample quantization, received digital data transmission is set to back-end processing by optical fiber
Digital Beam Formation Unit in standby.
Above-mentioned digital beam froming system, can be formed simultaneously multi-beam, carry out multidimensional to ionosphere target and quickly finely see
It surveys.
Above-mentioned monitoring subsystem completes the functions such as each channel characteristic measurement, transmission power real-time monitoring, by coupler, monitoring
Master network and frequency synthesizer component composition.
The system uses distributed emission, space power synthesis mode, with fast, the reliable and stable spy of beam scanning speed
Point.Therefore active phased array system incoherent scattering radar grinds small scale, fast-changing ionization sheaf space incoherent scattering
Study carefully significant.
Corresponding to above-described embodiment, the embodiment of the invention also provides a kind of highly sensitive thunder based on digital antenna array
Up to signal transmitting method, flow chart is as shown in Figure 7；This method is applied to above system, comprising the following steps:
Step S100, back-end processing controller generate firing order according to preset emission parameter.
Step S102, aerial array generates transmitting signal according to firing order, and emits transmitting signal.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
And/or the specific work process of device, it can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
If function is realized in the form of SFU software functional unit and when sold or used as an independent product, can store
In a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words to existing
Having the part for the part or the technical solution that technology contributes can be embodied in the form of software products, the computer
Software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be personal meter
Calculation machine, server or network equipment etc.) execute all or part of the steps of each embodiment method of the present invention.And it is above-mentioned
Storage medium includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic or disk.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that above embodiments, only a specific embodiment of the invention, to illustrate skill of the invention
Art scheme, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to the present invention into
Go detailed description, those skilled in the art should understand that: anyone skilled in the art is at this
It invents in the technical scope disclosed, can still modify or can be thought easily to technical solution documented by previous embodiment
To variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make corresponding
The essence of technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection scope of the present invention
Within.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of multi-functional incoherent scattering radar system of high sensitivity based on digital antenna array, which is characterized in that including
Aerial array and back-end processing controller；
The back-end processing controller is used to generate firing order according to preset emission parameter；
The aerial array is used to generate transmitting signal according to the firing order, and emits the transmitting signal；
The aerial array is also used to reception space electromagnetic wave signal, and carries out at the first signal to the spatial electromagnetic wave signal
Reason；
The back-end processing controller is also used to according to preset operating mode, to the spatial electromagnetic wave signal by signal processing
Carry out second signal processing；The operating mode includes spatial object tracking mode or ionospheric probing mode.
2. system according to claim 1, which is characterized in that the aerial array includes multiple submatrixs；The submatrix packet
Include setting quantity T R component, antenna element and power module；One antenna element and a T R component connect；
The power module and the T R component connect；
The T R component be used to generate transmitting to the firing order that sends according to the back-end processing controller of the radar system and believe
Number, and transmitting pretreatment is carried out to the transmitting signal；
The antenna element is also used to reception space electromagnetic wave signal for emitting the treated transmitting signal；
The T R component be also used to carry out the spatial electromagnetic wave signal reception pretreatment, will treated the space electricity
Magnetostatic wave signal is sent to the back-end processing controller；
The power module is used to power for the submatrix.
3. system according to claim 2, which is characterized in that the T R component include transmission channel and receiving channel；
The transmission channel includes sequentially connected Waveform generating circuit, the first filtering and amplifying circuit, up-converter circuit, second puts
Big filter circuit and circulator；What the Waveform generating circuit was used to be sent according to the back-end processing controller of the radar system
Firing order generates transmitting signal, and first filtering and amplifying circuit is used to that the power of the transmitting signal to be amplified and be filtered
Wave processing；The up-converter circuit is used to carry out the first frequency-conversion processing to the transmitting signal；Second filtering and amplifying circuit
For the transmitting signal after frequency-conversion processing to be amplified and is filtered；The circulator is for controlling the transmitting letter
Number carry out one-way transmission；
The receiving channel includes sequentially connected limiter, third filtering and amplifying circuit, lower frequency changer circuit, the 4th amplification filtering
Circuit and data quantization module；The limiter is used for the amplitude control of the spatial electromagnetic wave signal within the set range；
The third filtering and amplifying circuit is for amplifying and being filtered to the power of the spatial electromagnetic wave signal；The lower change
Frequency circuit is used to carry out the second frequency-conversion processing to the transmitting signal；After 4th filtering and amplifying circuit is used for frequency-conversion processing
The spatial electromagnetic wave signal amplify and be filtered；The data quantization module is used for treated the space
Electromagnetic wave signal carries out quantification treatment.
4. system according to claim 3, which is characterized in that the T R component further include polarizer；The polarizer point
It is not connect with the transmission channel, the receiving channel and the antenna element；The polarizer is used for according to preset polarization
It polarizes to the transmitting signal or the spatial electromagnetic wave signal in direction.
5. system according to claim 2, which is characterized in that the aerial array further includes feed cable, the T R group
Part by the feed cable with connect the power module.
6. system according to claim 2, which is characterized in that the back-end processing controller includes including digital beam shape
At unit, signal processing unit and data processing and display and control unit；
The Digital Beam Formation Unit respectively with the T R component receiving channel and the signal processing unit connect；Institute
Digital Beam Formation Unit is stated for forming specified direction wave beam according to the instruction of the radar system；The digital beam froming
Unit and the T the receiving channel of R component connect by optical fiber；
The signal processing unit is set between the Digital Beam Formation Unit and the data processing and display and control unit；Institute
Signal processing unit is stated for carrying out third signal processing to the specified direction wave beam according to preset operating mode；
The data processing and display and control unit are used for according to preset operating mode to the output signal of the signal processing unit
Carry out fourth signal processing；
The data processing and display and control unit are also used to receive the running parameter of user's input, and show the work of the radar system
Make parameter, the running parameter includes the one or more of work wave, detection airspace and working frequency.
7. system according to claim 6, which is characterized in that when preset operating mode is the spatial object tracking mould
When formula, the signal processing unit carries out pulse pressure and target detection for preset space hard goal signal；The data processing
With display and control unit for being read out to preset target position information, tracking filter and display；
When preset operating mode is the ionospheric probing mode, the signal processing unit is used for preset height layer
It ionizes layer signal and carries out auto-correlation function calculating, deblurring and spectra calculation；The data processing and display and control unit for pair
Preset ionosphere information is extracted and is shown.
8. system according to claim 3, which is characterized in that the system also includes frequency synthesizer components；The frequency synthesizer component
It is set between the aerial array and the back-end processing controller；The frequency synthesizer component is used for the spy to the aerial array
Property is monitored；The characteristic includes one of transmission channel characteristic, receiving channel characteristic and transmission power or a variety of；
The frequency synthesizer component is also used to generate local oscillation signal；The up-converter circuit believes the transmitting according to the local oscillation signal
Number carry out the first frequency-conversion processing；The lower frequency changer circuit carries out at the second frequency conversion the transmitting signal according to the local oscillation signal
Reason.
9. system according to claim 1, which is characterized in that the system also includes clock timing modules；
The clock timing module is used to provide synchronizing clock signals for the aerial array and the back-end processing controller.
10. a kind of highly sensitive radar signal method based on digital antenna array, which is characterized in that the method application
In the described in any item systems of claim 1-9, comprising:
The back-end processing controller generates firing order according to preset emission parameter；
The aerial array generates transmitting signal according to the firing order, and emits the transmitting signal.
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