CN104820219A - Active radar beacon machine and processing method thereof based on virtual target - Google Patents
Active radar beacon machine and processing method thereof based on virtual target Download PDFInfo
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- CN104820219A CN104820219A CN201510269737.8A CN201510269737A CN104820219A CN 104820219 A CN104820219 A CN 104820219A CN 201510269737 A CN201510269737 A CN 201510269737A CN 104820219 A CN104820219 A CN 104820219A
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
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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
- G01S7/28—Details of pulse systems
Abstract
The invention discloses an active radar beacon machine and processing method thereof based on a virtual target. After an antenna of a beacon machine receives an inquiry signal, the inquiry signal goes into a receiver through a circulator; after the receiver amplifies the inquiry signal, the signal and local oscillator signals are subjected to frequency mixing in a receiver front end to form an intermediate frequency signal which is transmitted to an intermediate-frequency receiver; then, filtering and sampling are carried out on the intermediate frequency signal to generate a level signal which is transmitted to a processor; coordinate of the position of the radar and coordinate of the position of the beacon machine are calculated by utilizing the GPS positioning technology, and then, delay time is converted into distance which is superposed; and coded pulses are output to a transmitter, and the emitting signals radiate to the space for an inquiry part to receive. The active radar beacon machine accurately calculates the coordinate of the position of the radar and the coordinate of the position of the beacon machine by utilizing the GPS positioning technology, and then, the delay time is converted into distance which is superposed, so that a calibration target can be transferred to a clean-background area, and the position marked by the beacon machine is allowed to be found more easily.
Description
Technical field
The invention belongs to Radar Technology field, specifically a kind of monostatic radar Radio Beacon based on virtual target and disposal route thereof.
Background technology
Identical with traditional primary radar system (by target radar signal reflected), secondary radar (its target is equipped with Radio Beacon or answering machine) as one of remote sensing electronic system can not only detect the direction of target and distance, and the position of target, speed and direction of motion can also be determined, and carry out enemy and we's identification.Radar beacon has been widely used in the aspects such as air traffic control, radio navigation, missile guidance, exterior trajectory measurement, satellite survey rail.Radar beacon is used for air traffic control, sends encoded interrogation signal, identifies according to the coded signal that every airplane is replied, to command aircraft safety landing by airport air traffic control radar to aircraft.In satellite communication, forwarding telegram, phone and television image by radar beacon, is Global Subscriber service.Airborne inquiry and ground face code response can provide accurate positional information and recognition instruction, can complete Ground Support, supply, throwing and rescue task.
Concerning with radar beacon machine, when its installation position is equipped with buildings, or when around having other objects, radar display screen will have a lot of noise with inquisitor, may cause finding and demarcate place really.The radar beacon machine also had adopts the radar beacon machine of answer signal and interrogating signal different-waveband, although hot-tempered some problem can be solved, but inquisitor needs the receiver increasing the corresponding wave band of a set of answer signal, this not only adds the complexity of equipment, also reduces the applicability of equipment.
Summary of the invention
The object of the invention is to provide a kind of monostatic radar Radio Beacon based on virtual target and disposal route thereof, this monostatic radar Radio Beacon uses GPS location technology accurately to calculate the coordinate of radar position and the coordinate of Radio Beacon position, distance superposition will be converted again time delay to get on, spotting can be transferred to the region of clean background, the position that Radio Beacon is demarcated is more prone to found.
Object of the present invention is achieved through the following technical solutions:
A kind of monostatic radar Radio Beacon based on virtual target, it is characterized in that: this monostatic radar Radio Beacon comprises antenna, circulator, receiver, intermediate-frequency receiver, processor, transmitter and power supply, described antenna, after receiving interrogating signal, enters receiver by circulator; After interrogating signal amplifies by receiver, with local oscillation signal mixing in receiving front-end, produce intermediate-freuqncy signal and send into intermediate-frequency receiver; Intermediate-frequency receiver, by carrying out filtering and sampling to intermediate-freuqncy signal, produces level signal, is sent to processor; Processor pair level signal carries out processing and identifying, then uses GPS location technology to calculate the coordinate of radar position and the coordinate of Radio Beacon position, then will convert to time delay to get on apart from superposition, then output encoder pulse is to transmitter; Transmitter is modulated and high power amplification transmitting according to coded pulse, forms high-power transmitting, transfers to a day alignment space radiation, receive for inquiry side through circulator (2); Receiver, intermediate-frequency receiver, processor are all connected with power supply with transmitter.
After described receiver is connected on and receives signal, through overcoupling, amplitude limit, amplification, filtering, and in frequency mixer, carry out mixing with the local oscillation signal that frequency source produces, down coversion generates intermediate-freuqncy signal.
Described transmitter have employed grid negative pressure safeguard measure to all amplifiers, and when powering on, the negative pressure of power amplifier grid takes the lead in setting up and remains, the malleation of power amplifier drain electrode is set up on demand after certain time delay; Signal madulation adopts premodulation mode, and power amplifier power-on time is early than microwave switch service time, and under power amplifier, the electricity time is later than the microwave switch shut-in time, the front and back of microwave switch along the time in 10n s magnitude.
Based on a disposal route for the monostatic radar Radio Beacon of virtual target, it is characterized in that this disposal route is specific as follows:
1), after radar beacon machine receives the interrogating signal of characteristic frequency by antenna, by circulator, interrogating signal is sent into receiver; After interrogating signal amplifies by receiver, the local oscillation signal produced with signal source carries out mixing, and down coversion produces intermediate-freuqncy signal; Intermediate-frequency receiver carries out filtering and sampling to above-mentioned intermediate-freuqncy signal, generates level signal, sends into processor;
2) processor pair level signal carries out identifying and processing, and then generates coded pulse signal and exports; Coded pulse signal is obtained the precise position information of radar beacon machine on the one hand by GPS precise positioning system by processor; The direction that another aspect is offset by Virtual Calibration place and the actual location of setting, distance parameter information, after processor is superimposed by both, generating virtual demarcates the coordinate position in place, by accurate time delay, modulation treatment, the virtual region to clean background, the place demarcated by radar beacon machine, obtains required target location.
Frequency source needed for radar beacon machine has reception self-test signal, local oscillation signal and transmitting pumping signal.Three groups of electricity frequency signals are produced by three phaselocked loops respectively.Three groups of phaselocked loops use same crystal oscillator to produce reference signal, obtain different frequency signals by regulating respective frequency dividing ratio.The microwave signal frequency using PHASE-LOCKED LOOP PLL TECHNIQUE to produce is very accurate, can meet the request for utilization of Radio Beacon in long-time stability completely.
When Radio Beacon is in response status, described receiver is in the state of normal Received signal strength.After receiver receives signal, enter directional coupler, then successively through limiter, amplifier, preselection filter.Then the local oscillation signal that the signal received and frequency source produce is carried out mixing in frequency mixer, last down coversion generates intermediate-freuqncy signal.
When Radio Beacon receive operator carry out the requirement of self-inspection time, the reception self-test signal produced by described signal source will enter receiver by directional coupler, then carries out above-mentioned processing procedure, and the oneself for receiving function detects.
Have employed grid negative pressure safeguard measure to all amplifiers in described transmitter design, during system electrification, the negative pressure of power amplifier grid takes the lead in setting up and remains, the malleation of power amplifier drain electrode just can be set up on demand after certain time delay.Signal madulation have employed premodulation mode, power amplifier power-on time is early than microwave switch service time, under power amplifier, the electricity time is later than the microwave switch shut-in time, and the front and back of microwave switch are along the time in 10n s magnitude, and when can ensure that burst pulse is launched thus, pulse signal has good forward position and rear edge.
The present invention has self-checking circuit, and self-checking circuit comprises reception self-inspection, launches self-inspection and self-check control circuit.
Self-check control circuit produces a self-inspection pulse signal, for the reception self-test signal that modulating frequency source produces, and the microwave pulse signal received when simulation normally works.Reception self-test signal after modulation enters receiver from directional coupler and carries out self-inspection process.If receive self-inspection process to obtain an expected result, then receive self-inspection and pass through.
Receive self-inspection and successfully can trigger transmitter work, launched microwave pulse signal.Be provided with transmitting self-checking circuit at transmitter output terminal, carry out detection to transmitting and compare, emissive power exceedes setting value, then judge that transmitter is working properly.
Virtual target processing procedure:
After radar beacon machine to receive the interrogating signal of characteristic frequency by antenna, by circulator, interrogating signal is sent into receiver; After interrogating signal amplifies by described receiver, the local oscillation signal produced with signal source carries out mixing, and down coversion produces intermediate-freuqncy signal; Described intermediate-frequency receiver carries out filtering and sampling to above-mentioned intermediate-freuqncy signal, generates level signal, sends into processor;
Processor pair level signal carries out identifying and processing, and then generates coded pulse signal.Described coded pulse signal is the precise position information being obtained radar beacon machine by processor by GPS precise positioning system on the one hand; The parameter information such as direction, distance offset by Virtual Calibration place and the actual location of setting on the other hand; After processor is superimposed by both, by accurate time delay, the virtual region to clean background, the place demarcated by radar beacon machine, makes required target be more prone to found; Because delay time can be arranged arbitrarily in the distance range of radar, so can be as the case may be, radar beacon machine is demarcated the virtual region to clean background, place, minimizing inquisitor receives the clutter in radar signal, reduces the interference strength of inquisitor.
The feature that the present invention has:
A) Parameter adjustable such as orientation, distance of Virtual Calibration point and Radio Beacon Location, to adapt to the needs of specific works environment;
B) receiver of moderate sensitivity: design receiving sensitivity is-45dBm, ensure that enough operating distance and detection probability.
C) moderate response power: design parameter is fixed with practical application condition, when volume, weight and power consumption allow, for improving operating distance and detection probability, Radio Beacon or answering machine should have higher power.
D) have recognition capability to interrogating signal: there is Multi-encoding recognition capability, can identify as Multi-encodings such as M sequence code, Barker codes, with adapt to multiple environment under use.
E) wide antenna radiation pattern and multiple polarization: for ensureing the all-the-way tracking to aircraft, often require omni-directional antenna pattern; Its polarization should be able to adapt to the needs of radar station, can be linear polarization or circular polarisation.
F) high frequency stability: the microwave signal frequency using PHASE-LOCKED LOOP PLL TECHNIQUE to produce is very accurate, can meet the request for utilization of Radio Beacon completely, for the flying speed of precision measurement aircraft provides the foundation in long-time stability.
G) higher response waveform degree of stability: for ensureing distance accuracy, transponder has less answering delay time and the amount of jitter of pulse waveform.
H) high reliability: it reliably can work on the aircraft that environment is more severe.Working time is as short as tens of second, reaches the several years.
I) volume is little, lightweight, power consumption is little, solid state, integrated.
The present invention adopts antenna receiving radar to transmit, and carries out to the received signal storing, forwards after the operation such as time delay and go back.Because delay time can be arranged arbitrarily in the distance range of radar, so virtual target can be placed on the region of clean background, as field, the back side, hillside etc., be easy to find required virtual target, GPS location technology is used accurately to calculate the coordinate of radar position and the coordinate of Radio Beacon position, distance superposition will be converted again time delay to get on, and just can complete virtual target and demarcate.
Accompanying drawing explanation
Fig. 1 is the structural representation based on the monostatic radar Radio Beacon of virtual target in the present invention.
Fig. 2 is self-checking circuit process flow diagram in the present invention.
Fig. 3 is Virtual Calibration place process flow figure in the present invention.
embodiment:
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Based on a monostatic radar Radio Beacon for virtual target, see Fig. 1, comprise antenna 1, circulator 2, receiver 3, intermediate-frequency receiver 4, processor 5, transmitter 6 and power supply 7.Antenna, after receiving interrogating signal, enters receiver by circulator; After interrogating signal amplifies by receiver, with local oscillation signal mixing in receiving front-end, produce intermediate-freuqncy signal and send into intermediate-frequency receiver; Intermediate-frequency receiver, by carrying out filtering and sampling to intermediate-freuqncy signal, produces level signal, is sent to processor; Processor pair level signal carries out processing and identifying, then uses GPS location technology to calculate the coordinate of radar position and the coordinate of Radio Beacon position, then will convert to time delay to get on apart from superposition, then output encoder pulse is to transmitter; Transmitter is modulated and high power amplification transmitting according to coded pulse, forms high-power transmitting, transfers to a day alignment space radiation, receive for inquiry side through circulator; Receiver, intermediate-frequency receiver, processor are all connected with power supply with transmitter.
After Radio Beacon receives the interrogating signal of characteristic frequency by antenna 1; Described interrogating signal will enter receiver 3 through circulator 2; After interrogating signal amplifies by described receiver 3, with local oscillation signal mixing in receiving front-end, produce intermediate-freuqncy signal and send into intermediate-frequency receiver 4; Described intermediate-frequency receiver 4, by carrying out filtering and sampling to intermediate-freuqncy signal, produces level signal, is sent to processor 5; Described processor 5 pairs of level signals process and identify, then GPS location technology is used accurately to calculate the coordinate of radar position and the coordinate of Radio Beacon position, to convert to time delay again distance superposition get on, finally again output encoder pulse to transmitter 6; Described transmitter 6 is modulated and high power amplification transmitting according to coded pulse, and final formation is high-power to transmit, and transfers to antenna 1, to space radiation, receive for inquiry side through circulator 2.
Radio Beacon is when being in response status, and receiver is in the state of normal Received signal strength.After receiver is connected on and receives signal, through overcoupling, amplitude limit, amplification, filtering, the local oscillation signal that the signal then received and frequency source produce carries out mixing in frequency mixer, and last down coversion generates intermediate-freuqncy signal.
Have employed grid negative pressure safeguard measure to all amplifiers in transmitter design, during system electrification, the negative pressure of power amplifier grid takes the lead in setting up and remains, the malleation of power amplifier drain electrode just can be set up on demand after certain time delay.Described signal madulation have employed premodulation mode, power amplifier power-on time is early than microwave switch service time, under power amplifier, the electricity time is later than the microwave switch shut-in time, the front and back of microwave switch are along the time in 10n s magnitude, and when can ensure that burst pulse is launched thus, pulse signal has good forward position and rear edge.
Frequency source has reception self-test signal, local oscillation signal and transmitting pumping signal.Three groups of electricity frequency signals are produced by three phaselocked loops respectively.Three groups of phaselocked loops use same crystal oscillator to produce reference signal, obtain different frequency signals by regulating respective frequency dividing ratio.The microwave signal frequency using PHASE-LOCKED LOOP PLL TECHNIQUE to produce is very accurate, can meet the request for utilization of Radio Beacon in long-time stability completely.
The present invention has self-checking circuit, and self-checking circuit comprises reception self-inspection, launches self-inspection and self-check control circuit.
Fig. 2 is self-checking circuit process flow diagram in the present invention.When Radio Beacon receive operator carry out the requirement of self-inspection time, self-check control circuit produces a self-inspection pulse signal 11, for the reception self-test signal that modulating frequency source produces, the microwave pulse signal received during the normal work of simulation.Reception self-test signal after modulation enters receiver from directional coupler and carries out self-inspection process 12.If receiving self-inspection process is not expected result 13, then self-inspection is not by 14, exports and is received from error detection error signal accordingly, if self-detection result is correct, then receives self-inspection and passes through, just continue next step.
Receive self-inspection and successfully can trigger transmitter work, launched microwave pulse signal 15.Be provided with transmitting self-checking circuit at transmitter output terminal, carry out detection to transmitting and compare 16, emissive power exceedes setting value 17, then judge transmitter working properly 19, otherwise transmitter work abnormal 18, export corresponding transmitting self-inspection rub-out signal.
Fig. 3 is Virtual Calibration place process flow figure in the present invention.After radar beacon machine to receive the interrogating signal of characteristic frequency by antenna, by circulator, interrogating signal is sent into receiver; After interrogating signal amplifies by receiver, the local oscillation signal produced with signal source carries out mixing, and down coversion produces intermediate-freuqncy signal; Intermediate-frequency receiver carries out filtering and sampling to above-mentioned intermediate-freuqncy signal of stating, and generates level signal 21, sends into processor 5.
Processor 5 pairs of level signals 21 identify and process, and then generate coded pulse signal 25 and carry out output 27.Coded pulse signal is the precise position information being obtained radar beacon machine by processor by GPS precise positioning system 22 on the one hand; The parameter information 26 such as direction, distance offset by Virtual Calibration place and the actual location of setting on the other hand; After processor is superimposed by both, generating virtual demarcates the coordinate position 23 in place; By process 24 such as accurate time delay, modulation, the virtual region to clean background, the place demarcated by radar beacon machine, makes required target be more prone to found.
Because delay time can be arranged arbitrarily in the distance range of radar, so can be as the case may be, radar beacon machine is demarcated the virtual region to clean background, place, minimizing inquisitor receives the clutter in radar signal, reduces the interference strength of inquisitor.
Claims (4)
1. the monostatic radar Radio Beacon based on virtual target, it is characterized in that: this monostatic radar Radio Beacon comprises antenna (1), circulator (2), receiver (3), intermediate-frequency receiver (4), processor (5), transmitter (6) and power supply (7), described antenna (1), after receiving interrogating signal, enters receiver (3) by circulator (2); After interrogating signal amplifies by receiver (3), with local oscillation signal mixing in receiving front-end, produce intermediate-freuqncy signal and send into intermediate-frequency receiver (4); Intermediate-frequency receiver (4), by carrying out filtering and sampling to intermediate-freuqncy signal, produces level signal, is sent to processor (5); Processor (5) processes level signal and identifies, then GPS location technology is used to calculate the coordinate of radar position and the coordinate of Radio Beacon position, to convert distance superposition again time delay to get on, then output encoder pulse is to transmitter (6); Transmitter (6) is modulated and high power amplification transmitting according to coded pulse, forms high-power transmitting, transfers to antenna (1) to space radiation, receive for inquiry side through circulator (2); Receiver (3), intermediate-frequency receiver (4), processor (5) are all connected with power supply (7) with transmitter (6).
2. the monostatic radar Radio Beacon based on virtual target according to claim 1, it is characterized in that: after described receiver (3) is connected on and receives signal, through overcoupling, amplitude limit, amplification, filtering, and in frequency mixer, carry out mixing with the local oscillation signal that frequency source produces, down coversion generates intermediate-freuqncy signal.
3. the monostatic radar Radio Beacon based on virtual target according to claim 1, it is characterized in that: described transmitter (6) have employed grid negative pressure safeguard measure to all amplifiers, when powering on, the negative pressure of power amplifier grid takes the lead in setting up and remains, the malleation of power amplifier drain electrode is set up on demand after certain time delay; Signal madulation adopts premodulation mode, and power amplifier power-on time is early than microwave switch service time, and under power amplifier, the electricity time is later than the microwave switch shut-in time, the front and back of microwave switch along the time in 10n s magnitude.
4. a disposal route for the monostatic radar Radio Beacon based on virtual target according to claim 1, is characterized in that this disposal route is specific as follows:
1), after radar beacon machine receives the interrogating signal of characteristic frequency by antenna, by circulator, interrogating signal is sent into receiver; After interrogating signal amplifies by receiver, the local oscillation signal produced with signal source carries out mixing, and down coversion produces intermediate-freuqncy signal; Intermediate-frequency receiver carries out filtering and sampling to above-mentioned intermediate-freuqncy signal, generates level signal, sends into processor;
2) processor pair level signal carries out identifying and processing, and then generates coded pulse signal and exports; Coded pulse signal is obtained the precise position information of radar beacon machine on the one hand by GPS precise positioning system by processor; The direction that another aspect is offset by Virtual Calibration place and the actual location of setting, distance parameter information, after processor is superimposed by both, generating virtual demarcates the coordinate position in place, by accurate time delay, modulation treatment, the virtual region to clean background, the place demarcated by radar beacon machine, obtains required target location.
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| CN107181541A (en) * | 2017-05-16 | 2017-09-19 | 中国电子科技集团公司第四十研究所 | A kind of electromagnetic spectrum monitoring receiver self-checking circuit and receiver |
| CN107677996A (en) * | 2017-05-22 | 2018-02-09 | 西安电子工程研究所 | A kind of online test method for radar system working condition |
| CN107783146A (en) * | 2017-09-07 | 2018-03-09 | 四川九洲电器集团有限责任公司 | It is a kind of to utilize microwave signal and the target identification method and device of optical signalling |
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| CN106546845A (en) * | 2016-10-18 | 2017-03-29 | 四川九洲电器集团有限责任公司 | A kind of method of testing and test system of test transmitter unit |
| CN107181541A (en) * | 2017-05-16 | 2017-09-19 | 中国电子科技集团公司第四十研究所 | A kind of electromagnetic spectrum monitoring receiver self-checking circuit and receiver |
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| CN107677996A (en) * | 2017-05-22 | 2018-02-09 | 西安电子工程研究所 | A kind of online test method for radar system working condition |
| CN107677996B (en) * | 2017-05-22 | 2021-01-01 | 西安电子工程研究所 | On-line detection method for working state of radar system |
| CN107783146A (en) * | 2017-09-07 | 2018-03-09 | 四川九洲电器集团有限责任公司 | It is a kind of to utilize microwave signal and the target identification method and device of optical signalling |
| CN110233638A (en) * | 2019-06-24 | 2019-09-13 | 上海航天测控通信研究所 | A kind of VHF frequency range landing search Radio Beacon |
| CN110794361B (en) * | 2019-10-21 | 2023-10-10 | 中国电子科技集团公司第三十六研究所 | Binary channels tacan signal reconnaissance device |
| CN110794361A (en) * | 2019-10-21 | 2020-02-14 | 中国电子科技集团公司第三十六研究所 | Binary channels ta kang signal reconnaissance device |
| CN111537963A (en) * | 2020-05-15 | 2020-08-14 | 扬州宇安电子科技有限公司 | Radar electronic bait system for military training |
| CN112558025A (en) * | 2020-11-30 | 2021-03-26 | 四川九洲空管科技有限责任公司 | Secondary radar inquiry and response function detection equipment |
| CN113050052A (en) * | 2021-03-08 | 2021-06-29 | 四川九洲空管科技有限责任公司 | Multi-target response simulation method for friend or foe identification system |
| CN113050052B (en) * | 2021-03-08 | 2022-08-09 | 四川九洲空管科技有限责任公司 | Multi-target response simulation method for friend or foe identification system |
| CN113466849A (en) * | 2021-03-16 | 2021-10-01 | 绵阳市游仙区创新科技产业技术研究院 | High-precision positioning system and method based on secondary radar |
| CN113127807A (en) * | 2021-04-19 | 2021-07-16 | 深圳华创电科技术有限公司 | Mode5 leading pulse jitter value calculation method and system based on constrained least square algorithm |
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