CN104579413B - A kind of comprehensive radio frequency system - Google Patents
A kind of comprehensive radio frequency system Download PDFInfo
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- CN104579413B CN104579413B CN201510003796.0A CN201510003796A CN104579413B CN 104579413 B CN104579413 B CN 104579413B CN 201510003796 A CN201510003796 A CN 201510003796A CN 104579413 B CN104579413 B CN 104579413B
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Abstract
The invention discloses a kind of comprehensive radio frequency system, including up/down antenna, it is used to receive 1030MHz/1090MHz and transmitting 1030MHz/1090MHz signals；Receiving module, it is connected with up/down antenna, 1030MHz the and 1090MHz signals for the up/down antenna to be received carry out pre-selection filtering, amplitude limit, amplification and radiofrequency signal processing；Signal processing module, it is connected with receiving module, and for carrying out pattern-recognition to the signal after sampling, information decodes, and decoded information is sent to data processing module and carries out data processing；Transmitting module, it is connected with receiving module and signal processing module.The present invention becomes one tri- TCAS, S mode answering machine and 1090ES ADS B functions, and an equipment realizes three functions, compact-sized, integrated level is high.
Description
Technical field
The present invention relates to a kind of comprehensive radio frequency system.
Background technology
At present, TCAS is worked based on secondary surveillance radar inquire/response mode, as the key equipment for ensureing flight safety
It is used widely in civil aviation field, by monitoring the presence of other aircrafts, position and movement in local ambient spatial domain
Situation so that pilot according to the machine in the case of the traffic in spatial domain, avoidance measure is actively taken, to avoid aircraft
The generation of collision accident.After the machine transmitting request signal, receive the answer signal of target machine, parse target machine height,
Flight parameters such as azimuth-range, while compared with the track data of the machine and calculate, draw target machine elevation rate,
The information such as range rate, judge the possibility bumped against with target machine, provide Traffic query (TA) and decision-making consulting (RA) is built
View.
S mode answering machine coordinates airborne TCAS equipment to realize empty/empty coordination collision avoidance, while is also ask with ground secondary radar
Ask that machine coordinates, to complete terrestrial air traffic control.The uplink/downlink data-link of S mode can be used for air-ground bi-directional data and this
Coordinate exchanging for collision avoidance information between machine and target machine.S mode answering machine receives ground interrogation machine or airborne TCAS by antenna
The 1030MHz request signals that equipment is sent, according to decoded result, carry out the encoding the response of corresponding modes, send modulator to be formed
1090MHz modulate pulse, then emitted machine and filtering after through aerial radiation in the air.
1090ES ADS-B be aircraft or the vehicle that is run in flight range periodically send its state vector and
Other information, air environment broadcast catchword, position, height, speed and some other parameter of flight automatically, usually every
500ms broadcasts a positional information.In feeder liner or trunk line machine, 1090ES ADS-B OUT airborne equipments are usually by S moulds
Formula answering machine realizes that S mode answering machine obtains aircraft real-time position information and three-dimensional velocity information by GNSS satellite, from air
Data system obtains the pressure altitude information of aircraft, by by above- mentioned information and its additional information such as aircraft identification, type of airplane
Deng to air broadcast.1090ES ADS-B IN airborne equipments usually can realize that the result after processing can by TCAS traffic computer
Shown by airborne CDTI, pilot can check spatial domain traffic nearby by CDTI.
Traffic control airborne equipment field in the air, current industry are widely used that by moulds such as TCAS, S mode answering machines
The comprehensive monitoring system and independent TCAS of block composition, S mode answering machine and 1090ES ADS-B equipment, TCAS, S mode response
The new monitoring system that tri- function synthesizeds of machine and 1090ES ADS-B are integrated only uses on the new main-line-aircraft in part,
Usual 1090ES ADS-B IN only realize that the timesharing of antenna or lower antenna receives, and covering is not complete, and there are part blind area.Due to
The difference of hardware environment and channel design, traditional discrete TCAS, S mode answering machine and 1090ES ADS-B device resources are only
Vertical, durability is low, and it is complicated that relation is crosslinked between equipment.In view of current technical conditions, the present invention refers to existing integrated supervision system
System hardware circuit, by improving radio-frequency channel circuit structure, above-mentioned work(can be achieved in upgrade signal processing and data processing software
Can, have the characteristics that to be easy to implement, autgmentability is strong, technology is novel.
The content of the invention
The present invention seeks to provide a kind of comprehensive radio frequency system in view of the defects existing in the prior art, which utilizes antenna
Multiplexing and radio-frequency channel optimization design, to realize that tri- TCAS, S mode answering machine and 1090ES ADS-B functions are integrated
Airborne Surveillance, Airborne Control equipment.
The present invention to achieve the above object, adopts the following technical scheme that：A kind of comprehensive radio frequency system, including up/down antenna,
It is used to receive 1030MHz/1090MHz and transmitting 1030MHz/1090MHz signals；Receiving module, it connects with up/down antenna
Connect, 1030MHz the and 1090MHz signals for the up/down antenna to be received carry out pre-selection filtering, amplitude limit, amplify and penetrate
Audio signalprocessing；Signal processing module, it is connected with receiving module, for carrying out pattern-recognition, information to the signal after sampling
Decoding, and decoded information is sent to data processing module and carries out data processing；Data processing module, itself and signal processing
Module connects, and is sent to external equipment for carrying out processing to decoded information, or the information for needing to launch is sent to signal
Processing module, and realize and the crosslinking of the data of external equipment and interface communication；Transmitting module, its input terminal and signal processing module
Connection, output terminal are connected with receiving module, are modulated, amplify, decay for the signal after being encoded to signal processing module, lead to
Cross switching network and be sent into receiving module；Frequency source module, for producing local oscillation signal and transmitting mould needed for receiving module mixing
Carrier signal needed for block modulation.
Further, the up/down antenna includes four antenna oscillators and matching beam-forming network respectively.
Further, the receiving module includes：The low-pass filter being connected with corresponding antenna oscillator, it is and corresponding
The voltage bias unit that low-pass filter is connected, switch is transmitted/received with what corresponding voltage bias unit was connected, and corresponding
Transmit/receive the preselection filter that switch is connected, the limiter being connected with corresponding preselection filter, with corresponding limiter phase
The low-noise amplifier of connection, the radiofrequency signal processing unit being connected with corresponding low-noise amplifier.
Further, the transmitting module includes the modulator being connected with frequency source module, the transmitting being connected with modulator
Machine, the numerical-control attenuator being connected with transmitter, the antenna selection switch being connected with numerical-control attenuator, and and antenna selection switch
Select 1 switch in the 4 of connection.
Further, the frequency source module includes high stability temperature-compensating crystal oscillator, brilliant with high stability temperature-compensating
Shake the phaselocked loop of connection, the voltage controlled oscillator being connected with phaselocked loop, the amplifier and wave filter being connected respectively with voltage controlled oscillator,
The power splitter being connected respectively with amplifier and wave filter.
Further, the radiofrequency signal processing unit includes power splitter, the S mode answering machine being connected respectively with power splitter
Radiofrequency signal handles subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；
Wherein, the S mode answering machine radiofrequency signal processing subelement includes the 1030MHz filtering being connected with power splitter
Device, the first low-noise amplifier LNA being connected with 1030MHz wave filters, is connected with the first low-noise amplifier LNA
1030MHz radiofrequency signal A/D converters；
The TCAS/1090ES ADS-B radiofrequency signals processing subelement includes the 1090MHz filtering being connected with power splitter
Device, the second low-noise amplifier LNA being connected with 1090MHz wave filters, is connected with the second low-noise amplifier LNA
1090MHz radiofrequency signal A/D converters.
Further, the radiofrequency signal processing unit includes image-rejection filter, with the image-rejection filter
The frequency mixer being connected, the power splitter being connected with the frequency mixer, the S mode answering machine being connected respectively with the power splitter
Radiofrequency signal handles subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；
Wherein, the S mode answering machine radio frequency processing subelement includes the first intermediate-frequency filter being connected with power splitter, with
First intermediate frequency amplifier IFA of first intermediate-frequency filter connection, in second be connected with the first intermediate frequency amplifier IFA
Frequency wave filter, the first A/D converters being connected with second intermediate-frequency filter；
The TCAS/1090ES ADS-B radiofrequency signals processing subelement includes the 3rd intermediate frequency being connected with the power splitter
Wave filter, the second intermediate frequency amplifier IFA being connected with the 3rd intermediate-frequency filter, be connected with the second intermediate frequency amplifier IFA
4th intermediate-frequency filter, the 2nd A/D converters being connected with the 4th intermediate-frequency filter.
Further, the radiofrequency signal processing unit includes power splitter, the S mode answering machine being connected respectively with power splitter
Radiofrequency signal handles subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；
Wherein, the 1030MHz image frequencies that the S mode answering machine radio frequency processing subelement includes being connected with power splitter suppress filter
Ripple device, the first frequency mixer being connected with 1030MHz image-rejection filters, the first intermediate frequency filtering being connected with the first frequency mixer
Device, the first intermediate frequency amplifier IFA being connected with the first intermediate-frequency filter, the second intermediate frequency being connected with the first intermediate frequency amplifier IFA
Wave filter, the first A/D converters being connected with the second intermediate-frequency filter；
The 1090MHz image frequencies that the TCAS/1090ES ADS-B radio frequency processings subelement includes being connected with power splitter suppress
Wave filter, the second frequency mixer being connected with 1090MHz image-rejection filters, the 3rd intermediate frequency filtering being connected with the second frequency mixer
Device, the second intermediate frequency amplifier IFA being connected with the 3rd intermediate-frequency filter, the 4th intermediate frequency being connected with the second intermediate frequency amplifier IFA
Wave filter, the 2nd A/D converters being connected with the 4th intermediate-frequency filter.
Beneficial effects of the present invention：
First, the present invention becomes one tri- TCAS, S mode answering machine and 1090ES ADS-B functions, an equipment
Realize three functions, it is compact-sized, integrated level is high.The hardware circuit design of comprehensive monitoring system is referred on radio-frequency receiving-transmitting passage
Thinking, receives channel using 8 and receives TCAS, S mode answering machine and 1090ES ADS-B signals.Compared to existing integrated supervision system
System, reception processing while realizing upper and lower antenna 1090ES ADS-B signals, avoids the reception of 1090ES ADS-B signals
Omit, add covering；The upper and lower antenna of TCAS radiofrequency signals receives at the same time, and signal processing can flexibly be chosen upper and lower as needed
The signal of antenna is handled, and existing comprehensive monitoring system is connect by switching timesharing of the selection to realize upper and lower aerial signal
Receive.
2nd, the radiofrequency signal processing unit of receiving module of the present invention can use high-speed a/d to carry out direct radio frequency bandpass sampling,
And digital down converter is built in the fpga chip of signal processing module, due to without using analog down converter and its periphery
Related device, radio circuit is simple, and digitized degree is high, and equipment volume, weight are also greatly lowered, and reliability further obtains
Improve.
3rd, the present invention can carry out antenna amount and receiving-transmitting chain cutting pattern according to the different demands of application platform, with full
The actual requirement of the different application platforms such as sufficient feeder liner, general-purpose aircraft, ground control point.
Brief description of the drawings
Fig. 1 is present system allomeric function block diagram.
Fig. 2 is one block diagram of embodiment of radiofrequency signal processing unit in present system.
Fig. 3 is two block diagram of embodiment of radiofrequency signal processing unit in present system.
Fig. 4 is three block diagram of embodiment of radiofrequency signal processing unit in present system.
Embodiment
Shown in Fig. 1, it is related to a kind of radio frequency system based on TCAS, S mode answering machine and 1090ES ADS-B synthesis, it has
There is the rf integration function not available for traditional discrete supervision equipment, utilize antenna multiplexed technology and eight radio-frequency channel transmitting-receivings
TCAS, S mode answering machine and 1090ES ADS-B radiofrequency signals；The system specifically includes up/down antenna, it is used to receive
1030MHz/1090MHz and transmitting 1030MHz/1090MHz signals；Receiving module, it is connected with up/down antenna, for by institute
State 1030MHz the and 1090MHz signals that up/down antenna receives and carry out pre-selection filtering, amplitude limit, amplification and radiofrequency signal processing；
Signal processing module, it is connected with receiving module, and for carrying out pattern-recognition to the signal after sampling, information decodes, and will solution
Information after code sends to data processing module and carries out data processing；Data processing module, it is connected with signal processing module, uses
External equipment is sent in carrying out processing to decoded information, or the information for needing to launch is sent to signal processing module, and
Realize and the crosslinking of the data of external equipment and interface communication；Transmitting module, its input terminal are connected with signal processing module, output terminal
It is connected with receiving module, is modulated, amplifies, decays for the signal after being encoded to signal processing module, pass through switching network
It is sent into receiving module；Frequency source module, for producing needed for local oscillation signal and the transmitting module modulation needed for receiving module mixing
Carrier signal.
In addition, the up/down antenna includes four antenna oscillators and matching beam-forming network respectively, can basis
, it can be achieved that the radiation of space omnidirectional or directional beam whether bias voltage loads.
Receiving module therein includes：The low-pass filter being connected with corresponding antenna oscillator, with corresponding low pass filtered
The voltage bias unit that ripple device is connected, transmits/receives switch with what corresponding voltage bias unit was connected, is transmitted/received with corresponding
The preselection filter being connected is switched, the limiter being connected with corresponding preselection filter, is connected with corresponding limiter
Low-noise amplifier, the radiofrequency signal processing unit being connected with corresponding low-noise amplifier.
Transmitting module therein includes：The modulator being connected with radio frequency source module, the transmitter being connected with modulator, with hair
Penetrate the numerical-control attenuator of machine connection, the antenna selection switch being connected with numerical-control attenuator, and 4 be connected with antenna selection switch
Select 1 switch.
Frequency source module therein includes：High stability temperature-compensating crystal oscillator, is connected with high stability temperature-compensating crystal oscillator
Phaselocked loop, the voltage controlled oscillator being connected with phaselocked loop, the amplifier and wave filter being connected respectively with voltage controlled oscillator, respectively with
The power splitter that amplifier is connected with wave filter.
In embodiment shown in Fig. 2, which includes power splitter, the S moulds being connected respectively with power splitter
Formula answering machine radiofrequency signal handles subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；
Wherein, the S mode answering machine radiofrequency signal processing subelement includes the 1030MHz filtering being connected with power splitter
Device, the first low-noise amplifier LNA being connected with 1030MHz wave filters, is connected with the first low-noise amplifier LNA
1030MHz radiofrequency signal A/D converters；
The TCAS/1090ES ADS-B radiofrequency signals processing subelement includes the 1090MHz filtering being connected with power splitter
Device, the second low-noise amplifier LNA being connected with 1090MHz wave filters, is connected with the second low-noise amplifier LNA
1090MHz radiofrequency signal A/D converters.
The embodiment directly samples radiofrequency signal using high-speed a/d converter, and number is built in signal processing module
Word quadrature transformer group replaces analog down converter.The embodiment is due to without using analog down circuit, therefore analog signal
Circuit structure is simple, digitized degree is high, good reliability, but due to direct RF sampling, will to A/D transducer performances and power consumption
Ask higher, with the development and progress of technology, the power consumption control of A/D radio frequency sampling chips is after zone of reasonableness, direct radio frequency band
Logical sampling technique will can welcome and be widely applied.
In embodiment shown in Fig. 3, which includes image-rejection filter, suppresses with the image frequency
The frequency mixer that wave filter is connected, the power splitter being connected with the frequency mixer, the S mode being connected respectively with the power splitter
Answering machine radiofrequency signal handles subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；
Wherein, the S mode answering machine radio frequency processing subelement includes the first intermediate-frequency filter being connected with power splitter, with
First intermediate frequency amplifier IFA of first intermediate-frequency filter connection, in second be connected with the first intermediate frequency amplifier IFA
Frequency wave filter, the first A/D converters being connected with second intermediate-frequency filter；
The TCAS/1090ES ADS-B radiofrequency signals processing subelement includes the 3rd intermediate frequency being connected with the power splitter
Wave filter, the second intermediate frequency amplifier IFA being connected with the 3rd intermediate-frequency filter, is connected with the second intermediate frequency amplifier IFA
4th intermediate-frequency filter, the 2nd A/D converters being connected with the 4th intermediate-frequency filter.
The embodiment refers to the widely used down-converted method of industry, is believed radio frequency using Analogue mixer
Number intermediate-freuqncy signal is down-converted to, then after A/D converters convert analog signals into digital signal, be sent into signal processing module
In FPGA processing.The embodiment circuit reliability is high, technology maturation, can effectively reduce development cost and cycle.
In embodiment shown in Fig. 4, which includes power splitter, the S moulds being connected respectively with power splitter
Formula answering machine radiofrequency signal handles subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；
Wherein, the 1030MHz image frequencies that the S mode answering machine radio frequency processing subelement includes being connected with power splitter suppress filter
Ripple device, the first frequency mixer being connected with 1030MHz image-rejection filters, the first intermediate frequency filtering being connected with the first frequency mixer
Device, the first intermediate frequency amplifier IFA being connected with the first intermediate-frequency filter, the second intermediate frequency being connected with the first intermediate frequency amplifier IFA
Wave filter, the first A/D converters being connected with the second intermediate-frequency filter；
The 1090MHz image frequencies that the TCAS/1090ES ADS-B radio frequency processings subelement includes being connected with power splitter suppress
Wave filter, the second frequency mixer being connected with 1090MHz image-rejection filters, the 3rd intermediate frequency filtering being connected with the second frequency mixer
Device, the second intermediate frequency amplifier IFA being connected with the 3rd intermediate-frequency filter, the 4th intermediate frequency being connected with the second intermediate frequency amplifier IFA
Wave filter, the 2nd A/D converters being connected with the 4th intermediate-frequency filter.
The embodiment is distinguished with reference also to the widely used down-converted method of industry with Fig. 3 the embodiment described
After the frequency mixer in this programme is arranged in power splitter, i.e. S mode answering machine signal processing subelement and TCAS/1090ES
ADS-B signal processings subelement respectively needs a frequency mixer that radiofrequency signal is down-converted to intermediate-freuqncy signal, and image rejection performance is more
It is good, and the frequency mixer of Fig. 3 the embodiment described is arranged in before power splitter, whole unit only needs a frequency mixer.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (4)
- A kind of 1. comprehensive radio frequency system, it is characterised in that：Utilize antenna multiplexed technology, eight radio-frequency channel transmitting-receiving TCAS, S modes Answering machine and 1090ES ADS-B radiofrequency signals, including up/down antenna, it is used to receive 1030MHz/1090MHz and transmitting 1030MHz/1090MHz signals；Receiving module, it is connected with up/down antenna, for receive the up/down antenna 1030MHz and 1090MHz signals carry out pre-selection filtering, amplitude limit, amplification and radiofrequency signal processing；Signal processing module, it is with connecing Module connection is received, for carrying out pattern-recognition to the signal after sampling, information decodes, and decoded information is sent to data Processing module carries out data processing；Data processing module, it is connected with signal processing module, for being carried out to decoded information External equipment is sent in processing, or the information for needing to launch is sent to signal processing module, and realizes the data with external equipment Crosslinking and interface communication；Transmitting module, its input terminal are connected with signal processing module, and output terminal is connected with receiving module, is used for Signal after being encoded to signal processing module is modulated, amplifies, decays, and receiving module is sent into by switching network；Frequency source Module, for producing the local oscillation signal needed for receiving module mixing and the carrier signal needed for transmitting module modulation；The receiving module includes the low-pass filter being connected with corresponding antenna oscillator, is connected with corresponding low-pass filter The voltage bias unit connect, switch is transmitted/received with what corresponding voltage bias unit was connected, is connected with the corresponding switch that transmits/receives The preselection filter connect, the limiter being connected with corresponding preselection filter, the low noise being connected with corresponding limiter Amplifier, the radiofrequency signal processing unit being connected with corresponding low-noise amplifier；The radiofrequency signal processing unit includes power splitter, the S mode answering machine radiofrequency signal processing being connected respectively with power splitter Subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；Wherein, the S mode answering machine radiofrequency signal processing subelement includes the 1030MHz wave filters being connected with power splitter, with First low-noise amplifier LNA of 1030MHz wave filters connection, the 1030MHz radio frequencies being connected with the first low-noise amplifier LNA Signal A/D converter；The TCAS/1090ES ADS-B radiofrequency signals processing subelement includes the 1090MHz wave filters being connected with power splitter, with Second low-noise amplifier LNA of 1090MHz wave filters connection, the 1090MHz radio frequencies being connected with the second low-noise amplifier LNA Signal A/D converter；Alternatively,The radiofrequency signal processing unit includes image-rejection filter, the mixing being connected with the image-rejection filter Device, the power splitter being connected with the frequency mixer, the S mode answering machine radiofrequency signal processing being connected respectively with the power splitter Subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；Wherein, the S mode answering machine radiofrequency signal processing subelement includes the first intermediate-frequency filter being connected with power splitter, with First intermediate frequency amplifier IFA of first intermediate-frequency filter connection, in second be connected with the first intermediate frequency amplifier IFA Frequency wave filter, the first A/D converters being connected with second intermediate-frequency filter；The TCAS/1090ES ADS-B radiofrequency signals processing subelement includes the 3rd intermediate frequency filtering being connected with the power splitter Device, the second intermediate frequency amplifier IFA being connected with the 3rd intermediate-frequency filter, the 4th be connected with the second intermediate frequency amplifier IFA Intermediate-frequency filter, the 2nd A/D converters being connected with the 4th intermediate-frequency filter；Alternatively,The radiofrequency signal processing unit includes power splitter, the S mode answering machine radiofrequency signal processing being connected respectively with power splitter Subelement and TCAS/1090ES ADS-B radiofrequency signals processing subelement；Wherein, the 1030MHz image frequencies that the S mode answering machine radiofrequency signal processing subelement includes being connected with power splitter suppress filter Ripple device, the first frequency mixer being connected with 1030MHz image-rejection filters, the first intermediate frequency filtering being connected with the first frequency mixer Device, the first intermediate frequency amplifier IFA being connected with the first intermediate-frequency filter, the second intermediate frequency being connected with the first intermediate frequency amplifier IFA Wave filter, the first A/D converters being connected with the second intermediate-frequency filter；The 1090MHz image frequencies that the TCAS/1090ES ADS-B radiofrequency signals processing subelement includes being connected with power splitter suppress Wave filter, the second frequency mixer being connected with 1090MHz image-rejection filters, the 3rd intermediate frequency filtering being connected with the second frequency mixer Device, the second intermediate frequency amplifier IFA being connected with the 3rd intermediate-frequency filter, the 4th intermediate frequency being connected with the second intermediate frequency amplifier IFA Wave filter, the 2nd A/D converters being connected with the 4th intermediate-frequency filter.
- A kind of 2. comprehensive radio frequency system as claimed in claim 1, it is characterised in that：The up/down antenna includes four respectively Antenna oscillator and matching beam-forming network.
- A kind of 3. comprehensive radio frequency system as claimed in claim 1, it is characterised in that：The transmitting module includes and frequency source mould The modulator of block connection, the transmitter being connected with modulator, the numerical-control attenuator being connected with transmitter, is connected with numerical-control attenuator Antenna selection switch, and 4 be connected with antenna selection switch select 1 switch.
- A kind of 4. comprehensive radio frequency system as claimed in claim 3, it is characterised in that：The frequency source module includes high stability Temperature-compensating crystal oscillator, the phaselocked loop being connected with high stability temperature-compensating crystal oscillator, the voltage controlled oscillator being connected with phaselocked loop, respectively The amplifier and wave filter being connected with voltage controlled oscillator, the power splitter being connected respectively with amplifier and wave filter.
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