CN104267395A - Method for achieving C-mode low-voice calling of traffic collision avoidance system - Google Patents
Method for achieving C-mode low-voice calling of traffic collision avoidance system Download PDFInfo
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- CN104267395A CN104267395A CN201410512868.XA CN201410512868A CN104267395A CN 104267395 A CN104267395 A CN 104267395A CN 201410512868 A CN201410512868 A CN 201410512868A CN 104267395 A CN104267395 A CN 104267395A
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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
-
- 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
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/933—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of aircraft or spacecraft
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/04—Anti-collision systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Aviation & Aerospace Engineering (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Signal Processing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Provided is a method for achieving C-mode low-voice calling of a traffic collision avoidance system. Layered and different-beam inquiry is conducted on nearby airspace by controlling inquiry power, the number and density of C-mode inquiry responses are effectively reduced, and the airspace electromagnetic environment around an airplane is simpler. After the scheme is adopted, secondary radar can be higher in efficiency and more reliable in the communication process, the air traffic environment sensory capacity is greatly improved, and the reliability and effectiveness of air traffic early warning and collision avoidance are enhanced.
Description
Technical field
The invention belongs to airborne equipment technical field, be specifically related to the little sound calling implementation method of a kind of air traffic collision avoidance system C mode, for air traffic early warning and crashproof.
Background technology
Along with the development of secondary radar technology and the increase of airborne communication content requirements, airborne secondary radar gradually from A pattern answering machine to C mode, the use transition of S mode answering machine.The maximum airborne answering machine of current use is S mode and C mode answering machine, and their answer signal meets S mode transformat and C mode transformat respectively.The land station of air traffic control now and air traffic collision avoidance system can complete and receive the inquiry of C mode, S mode signal and response.The answering machine of S mode is for transmitting the information such as height, identity ID and meteorology.S mode can carry out roll-call inquiry, by roll-call question-response, reduces quantity and the number of times of response.The answering machine of C mode only reports the machine elevation information, does not have the machine identity identification information, carries out passive response to any C mode inquiry received, and normally one asks and answers more.Therefore, when air traffic collision avoidance system (TCAS) sends C mode inquiry, the C mode answering machine that local ambient receives C mode interrogation signal all will be replied this inquiry.Like this when the C mode aircraft density of local ambient is larger, electromagnetic environment will be very complicated, easily produce mixedly to disturb, synchronous interference, affect air communication link transmission, is therefore necessary to propose improvement.
Summary of the invention
The technical matters that the present invention solves: provide a kind of air traffic collision avoidance system C mode little sound calling implementation method, by reducing the response quantity of each inquiry, reduce radio communication interference, improve air communication quality, make the reliable easily discrimination of the response of the C mode inquiry of air traffic collision avoidance system and C mode answering machine, under the process of traffic collision avoidance system aloft, effectively realize air traffic early warning and crashproof.
The technical solution used in the present invention: the little sound calling implementation method of a kind of air traffic collision avoidance system C mode, has main processing block, coding module, decoding module and radio-frequency (RF) receiving and transmission module;
The inquiry that described main processing block completes C mode answer signal controls, and processes C mode reply data, and the elevation information obtaining invasion machine is used for crashproof process;
Described coding module primary recipient main processing block send control command, control command is resolved and generates and send the inquiry command sequence of C mode, complete inquiry sky line options, inquiry model selection, inquiry power controls and inquiry sequence sends; Communicate with described decoding module simultaneously, send number control signal to decoding module, inform that decoding module receives response time, sensitivity and duration;
The signal that described decoding module sends according to coding module, be combined in the stepping of coding module generation in this inquiry cycle, power, inquiry beam data, control and receiving radio frequency front end process after intermediate-freuqncy signal carry out converting and decoding, carry out preliminary analysis to resolve simultaneously, complete the decoding of C mode answer signal, export the distance of target, the highly information such as code and Directional Sign and result is reported to main processing block, carrying out C mode target following and crashproof process by main processing block;
Described radio-frequency (RF) receiving and transmission module completes generation and the transmitting of 1030MHZ interrogation signal, directional antenna is used to control from different perspectives to send sequence interrogation signal, the interrogation signal power launched is sequence variation, the layering in scope is carried out in space, complete the reception of answer signal, the formation of radio-frequency channel simultaneously and receive the pre-service of information, and the switching of the complete twin aerial of order according to coding module.
Further, the described switching to antenna, comprises the switching of Transmit enable, up and down antenna, and point 4 tunnels receive from 0 degree, 90 degree, 180 degree, and the signal in 270 degree of directions also carries out pre-service.
Further, described C mode inquiry is divided into two kinds of situations: unitary call full inquiry pattern and little sound calling interrogation mode, its medium and small sound calling interrogation mode comprises low-density substantially little sound calling inquiry pattern and high resolving power little sound calling inquiry pattern, the principle selected is according to initial conditions, the little sound type of call of prioritizing selection high resolving power, secondly select the substantially little sound type of call of low-density, finally select the full inquiry pattern of unitary call.
The present invention, compared with prior art by controlling inquiry power, carrying out layering, point wave beam inquiry to closing on spatial domain, effectively reducing quantity and the density of C mode inquiry response, making the spatial domain electromagnetic environment of local ambient simpler; After using this scheme, secondary radar can be more efficient more reliable when communicating, and substantially increase Traffic Environment perception, enhances air traffic early warning and crashproof reliability and validity.
Accompanying drawing explanation
Fig. 1 is principle of the invention structural representation;
Fig. 2 is basic model of the present invention little sound calling time diagram;
Fig. 3 is the little sound calling inquiry sequence of basic model of the present invention and power schematic diagram.
Embodiment
Below in conjunction with accompanying drawing 1-3, a kind of embodiment of the present invention is described.
C mode answering machine only reports the machine height, adopt the inquiry/response form of broadcast type, carry out asking and answer more, for same inquiry, if close on spatial domain multi rack C mode answering machine to reply simultaneously, the crashproof processor of air traffic cannot carry out location identity identification to invasion machine, and very easily produce interference.Little sound is adopted to call out inquiry mode, initiatively initiate repeatedly inquiry, at different directions, use different inquiry power, suppress signal, receiving sensitivity, successively cover local ambient capable of being monitored scope, after the aircraft of interrogation signal overlay area receives inquiry, reply, the aircraft in interrogation signal uncovered area or the suppressed region of interrogation signal does not need to answer, and so just can reduce response quantity and interference.
The little sound calling implementation method of a kind of air traffic collision avoidance system C mode, has main processing block, coding module, decoding module and radio-frequency (RF) receiving and transmission module; The inquiry that described main processing block completes C mode answer signal controls, and processes C mode reply data, and the elevation information obtaining invasion machine is used for crashproof process; Described coding module primary recipient main processing block send control command, control command is resolved and generates and send the inquiry command sequence of C mode, complete inquiry sky line options, inquiry model selection, inquiry power controls and inquiry sequence sends; Communicate with described decoding module simultaneously, send number control signal to decoding module, inform that decoding module receives response time, sensitivity and duration; The signal that described decoding module sends according to coding module, be combined in the stepping of coding module generation in this inquiry cycle, power, inquiry beam data, control and receiving radio frequency front end process after intermediate-freuqncy signal, to go forward side by side line translation and decoding, carry out preliminary analysis to resolve simultaneously, complete the decoding of C mode answer signal, export the distance of target, the highly information such as code and Directional Sign and result is reported to main processing block, carrying out C mode target following and crashproof process by main processing block; Described radio-frequency (RF) receiving and transmission module completes generation and the transmitting of 1030MHZ interrogation signal, directional antenna is used to control from different perspectives to send sequence interrogation signal, the interrogation signal power launched is sequence variation, the layering in scope is carried out in space, complete the reception of answer signal, the formation of radio-frequency channel simultaneously and receive the pre-service of information, and the switching of the complete twin aerial of order according to coding module.Specifically, the described switching to antenna, comprises the switching of Transmit enable, up and down antenna, and point 4 tunnels receive from 0 degree, 90 degree, 180 degree, and the signal in 270 degree of directions also carries out pre-service.
Described C mode inquiry is divided into two kinds of situations: unitary call full inquiry pattern and little sound calling interrogation mode, its medium and small sound calling interrogation mode comprises low-density substantially little sound calling inquiry pattern and high resolving power little sound calling inquiry pattern, the principle selected is according to initial conditions, the little sound type of call of prioritizing selection high resolving power, secondly select the substantially little sound type of call of low-density, finally select the full inquiry pattern of unitary call.
Little sound calling sequence is launched by upper antenna 4 oscillators and lower antenna oscillator, and these 5 different wave beams independently select little sound calling sequence type.The signal that the invasion machine that main processing block intercepts surrounding under listen mode sends, store the correlation parameter under each mode of operation respectively, such as sky line options, the selection of ripple position, power etc., the conditions such as the invasion machine number density that the machine listens to according to the full inquiry pattern of unitary call select inquiry pattern.
Monitor within the scope of independent beam at a TCAS that is directed or omnirange beam, if do not receive C mode answer signal, then send single interrogating signal, calling inquiry sequence of not sending out sound little, to monitor the existence of equipment C mode answering machine aircraft, and C mode detecting and tracking with whether start little sound and call out interrogation mode.The most higher primary school sound calling inquiry level that the power level of single query and the minimum triggering level (MTL) of correspondence will equal at that beam emissions in a particular beam.Main processing block sends order, and coding module carries out parsing and generates inquiry time series control transmitting.
Relevant in distance when listening to the response of two C mode, namely through calculating, they are identified as may be a target, and main processing block builds up flight path, or a tested flight path enters into another one beam from an antenna beam, think that this flight path may be same target, at this moment will start basic little sound calling inquiry pattern, the information such as basic model calling stepping and power etc. of little sound calling inquiry mode sequences is shown in Fig. 3.Fig. 3 related description is as follows:
1, in upper antenna forward sequence, the priority of forward radiation reduces 1dB at every turn;
2, about upper antenna in sequence, the priority of radiation to the left and right reduces 1dB at every turn;
3, after upper antenna in sequence, the priority of radiation backward reduces 1dB at every turn;
4, in lower antenna omnidirectional sequence, the priority of radiation reduces 1dB at every turn;
5, " I " represents the Effective Radiated Power (ERP) of P1, P3 and P4 inquiry pulse;
6, " S " represents the ERP of S1 suppressor pulse;
7, " S
●i " represent the ERP of S1 2dB less of inquiry ERP;
8, " S
● ●i " represent the ERP of S1 3dB less of inquiry ERP;
9, " S
● ● ● ● ● ● ● ● ●i " represent the ERP of S1 10dB less of inquiry ERP;
10, S1 transponder pulse is not had in last stepping of each quadrant.
11, minimum Effective Radiated Power level (dBm)
First condition judgment is carried out by main processing block, time eligible, start basic model little sound calling inquiry, the information such as the control command of inquiry, stepping, power, sky line options are sent to coding module, coding module generates the time series of inquiry according to control command, and the information such as ripple position, antenna are resolved, send to radio-frequency (RF) receiving and transmission module, selectively interrogation signal is launched, give the information such as decoding module transmitting time and receiving sensitivity simultaneously, decoding module controls radio-frequency (RF) receiving and transmission module according to these information and receives answer signal, and carries out timing.As received the inquiry response of C mode within the time of setting, be then considered as effectively.As exceeded time range, then this little sound inquiry terminates, and proceeds to next stepping inquiry.Obtained information is carried out solution mediation decoding by decoding module, sends to main processing block to carry out flight path and sets up tracking etc.
Low-density substantially little sound calling inquiry pattern can produce 6 inquiry steppings, and each stepping has maximum power and minimum power, show respectively the border farthest of inquiry and nearest border.Answering machine in these two boundses can receive the inquiry of this stepping and reply.The machine receiver also receives only the C mode answer signal of the answering machine that the inquiry of this inquiry power energy is arrived, and setup times and receiving sensitivity, when time-out or power exceed the scope of this inquiry power, answering machine does not just receive interrogation signal, does not just reply yet.The inquiry of such 6 steppings, just by the space of local ambient, draws near and is divided into 6 space fan rings adjacent to one another.Aircraft within certain little sound calling inquiry scope carries out selective acknowledgment to interrogation signal, and the inquiry that do not receive outside scope is not also just replied, and which reduces the number of times of response, reduces the Radio frequency interference (RFI) of space data link.
Local ambient spatial division is become 24 space fan rings adjacent to one another by high resolving power little sound calling inquiry pattern.(C1) mark is measured when decoding module generates low confidence bit to tracking target, illustrate that the density of invasion machine is larger, there is phantom during response, now low resolution can not meet the supervision to C mode invasion machine, just needs to select the little sound calling sequence of high resolving power.High-resolution inquiry realizes closing on the thinner layering inquiry in spatial domain, makes inquiry cover the fan ring scope generated narrower, with the response of the little multi rack intruder of space distance control, and then distinguishes it and follows the tracks of.
The invasion machine of main processing block to local ambient spatial domain equipment C mode answering machine is followed the tracks of and is distinguished.To the aircraft traced into, mark according to different range, different danger classes.Then comprehensively judge, then generate air traffic consulting or decision recommendation, evade intruder safely to help pilot.
The present invention is by reducing the response quantity of each inquiry, reduce radio communication interference, improve air communication quality, make the reliable easily discrimination of the response of the C mode inquiry of air traffic collision avoidance system and C mode answering machine, under the process of traffic collision avoidance system aloft, effectively realize air traffic early warning and crashproof.
Above-described embodiment, just preferred embodiment of the present invention, is not used for limiting the scope of the present invention, therefore all equivalence changes done with content described in the claims in the present invention, all should be included within the claims in the present invention scope.
Claims (3)
1. the little sound calling implementation method of air traffic collision avoidance system C mode, is characterized in that having main processing block, coding module, decoding module and radio-frequency (RF) receiving and transmission module;
The inquiry that described main processing block completes C mode answer signal controls, and processes C mode reply data, and the elevation information obtaining invasion machine is used for crashproof process;
Described coding module primary recipient main processing block send control command, control command is resolved and generates and send the inquiry command sequence of C mode, complete inquiry sky line options, inquiry model selection, inquiry power controls and inquiry sequence sends; Communicate with described decoding module simultaneously, send number control signal to decoding module, inform that decoding module receives response time, sensitivity and duration;
The signal that described decoding module sends according to coding module, be combined in the stepping of coding module generation in this inquiry cycle, power, inquiry beam data, control and receiving radio frequency front end process after intermediate-freuqncy signal, to go forward side by side line translation and decoding, carry out preliminary analysis to resolve simultaneously, complete the decoding of C mode answer signal, export the distance of target, the highly information such as code and Directional Sign and result is reported to main processing block, carrying out C mode target following and crashproof process by main processing block;
Described radio-frequency (RF) receiving and transmission module completes generation and the transmitting of 1030MHZ interrogation signal, directional antenna is used to control from different perspectives to send sequence interrogation signal, the interrogation signal power launched is sequence variation, the layering in scope is carried out in space, complete the reception of answer signal, the formation of radio-frequency channel simultaneously and receive the pre-service of information, and the switching of the complete twin aerial of order according to coding module.
2. the little sound calling implementation method of air traffic collision avoidance system C mode according to claim 1, is characterized in that: the described switching to antenna, comprises the switching of Transmit enable, up and down antenna, 4 tunnels are divided to receive from 0 degree, 90 degree, 180 degree, the signal in 270 degree of directions also carries out pre-service.
3. the little sound calling implementation method of air traffic collision avoidance system C mode according to claim 1 and 2, it is characterized in that: described C mode inquiry is divided into two kinds of situations: unitary call full inquiry pattern and little sound calling interrogation mode, its medium and small sound calling interrogation mode comprises low-density substantially little sound calling inquiry pattern and high resolving power little sound calling inquiry pattern, the principle selected is according to initial conditions, the little sound type of call of prioritizing selection high resolving power, secondly select the substantially little sound type of call of low-density, finally select the full inquiry pattern of unitary call.
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| CN106685422A (en) * | 2017-03-02 | 2017-05-17 | 四川九洲空管科技有限责任公司 | Integrated coding and decoding device and method based on FPGA |
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Application publication date: 20150107 |