CN205539477U - Big dipper communication navigation integration airborne terminal - Google Patents

Abstract

The utility model provides a big dipper communication navigation integration airborne terminal, include: big dipper machine carries the subscriber computer, and the machine carries navigation information processing machine and passenger cabin traffic information display, big dipper machine carries the subscriber computer for receiving and sending big dipper communications and information, the machine carries navigation information processing machine for the navigation information data are carried with the combination processor to the encoding and decoding task of accomplishing airborne vehicle big dipper information, passenger cabin traffic information display for information display and control provide man -machine interface for the pilot.

Description

A kind of Beidou communication navigation integral machine mounted terminal

Technical field

This utility model belongs to subhost mounted terminal technical field, is specifically related to a kind of Beidou communication navigation Integral machine mounted terminal.

Background technology

Along with developing rapidly of China's Aviation Industry, C919 airliner, ARJ21 turbofan secondary-line-aircraft, Xinzhou 60 whirlpool oar secondary-line-aircraft, H425 helicopter, fortune 12 general-purpose aircrafts, straight 15 Medium Helicopters Continue to bring out Deng type aircraft, especially as deepening continuously of China's low altitude airspace administrative reform, general Air market fast development day by day, the airborne vehicle of low altitude flight often faces communication in flight course Lost efficacy, navigate inaccurate, monitor the blind area serious reality technology problem such as big, be also current international airline The airborne equipment technology subject matter that interface is faced.

Summary of the invention

For overcoming above-mentioned the deficiencies in the prior art, this utility model provides a kind of Beidou communication navigation one Body Airborne Terminal, including:

The airborne subscriber computer of the Big Dipper, airborne sail information datatron and cockpit traffic information display；

The airborne subscriber computer of the described Big Dipper, is used for receiving and send Beidou communication information；

Described airborne sail information datatron, be used for airborne vehicle Big Dipper information encoding and decoding task and The airborne navigation information data of combined treatment；

Described cockpit traffic information display, comprises touch screen, shows for information and controls, and being Pilot provides human-computer interaction interface.

Preferably, the airborne subscriber computer of the described Big Dipper includes antenna and main frame；

Described antenna farther includes:

Power amplifier, for being amplified to long-distance transmissions by low level signal needed in tranmitting frequency The high power levels wanted；

Emission filter, the band stray signal in the output signal filtering power amplifier；

Duplexer, farther includes the Big Dipper and receives LNA unit, emission controlling unit and He Lu Processing unit；

The described Big Dipper receives LNA unit, does radio-frequency front-end process for the Big Dipper receives signal；

Emission controlling unit, for controlling Big Dipper emission power amplifier；

Described conjunction road processing unit, launches signal synthesize for the Big Dipper receives signal and the Big Dipper.

Preferably, described main frame farther includes converter module, signal processing module signal, information Processing module and power module；

Described converter module includes launching channel and receiving channel, has been used for up/down frequency conversion, gain Balance, intermediate frequency filtering；

Signal processing module, samples for the carrying out simulating low intermediate frequency signal sending converter module here, Simulation low intermediate frequency signal is transformed to time discrete digital signal；Complete docking collect mail number capture, with The demodulation of track, navigation message, time difference measurement；The transmission base band data sending message processing module here is carried out Data after spread spectrum are sent converter module, are produced modulated spread spectrum signal by spread processing；

Described message processing module is used for processing reception data；Described process include but not limited to broadcast, The extraction of the information such as public, communication, it is achieved user authorizes；

Described power module, including battery module for powering.

Preferably, described message processing module is also responsible for detecting outside Interface status in real time, inspection After measuring effective order, the order received is explained, perform corresponding operation.

Preferably, described in effective order detected after the order received is explained, perform corresponding Operation, particularly as follows: if launch related command, then according to check-in signal form framing, warp Signal processing module is given after authentication.

Preferably, power module also includes electromagnetic interface filter.

Preferably, described airborne sail information datatron farther includes message processing module (MPM), memorizer Module, interface processing module, power source protective module；

Described message processing module (MPM) farther includes:

ADS-C packet parsing module, sends for receiving ground air traffic control system from the airborne subscriber computer of the Big Dipper ADS-C contract message, message is resolved, and carries out automatically according to fixing contract form Response；

ADS-C message assembles module, is used for from the Big Dipper airborne subscriber computer receiving position data, and logarithm According to carrying out analytical Calculation, then it is packaged into ADS-C contract message, is sent to north according to setting frequency Struggle against airborne subscriber computer thus realize the lower transmission module of ADS-C message；

CPDLC packet parsing module, for receiving the CPDLC message from the airborne subscriber computer of the Big Dipper Information, and message is carried out dissection process, then send cockpit traffic information display to show；

CPDLC message assembles module, should for receiving the pilot from cockpit traffic information display Answer or actively under deliver a letter breath, and this information form according to the rules is assembled into CPDLC downlink message, so After message is sent to the airborne subscriber computer of the Big Dipper, thus realize passing under CPDLC message；

Described memory module, the various data used for depositing information process to need；

Described interface processing module, comprises 5 serial ports, has the FIFO of 64Bytes, serial ports baud Rate is adjustable, reaches as high as 115.2Kbps；From external reception Big Dipper transceiving data；Airborne ins signal； Pressure altitude signal；Cockpit display data and loading and detection data；

Described power source protective module, is drawn by unified plug, configures power-supply filter, power panel On to male connector all with the plugs and sockets of locking mechanism, to ensure that patch plug is solid and reliable.

Preferably, airborne sail information processor pair external tapping includes:

Subscriber computer airborne with the Big Dipper carries out the RS-422 interface of data crosslinking；Hand over cockpit traffic display The RS-422 interface of connection；Load for data and the RS-232 interface of detection；Carrier aircraft power interface； Standby RS-422 interface: combined treatment airborne navigation data source.

Preferably, described cockpit traffic information display has USB, RS-232 and RS-422 tri- External interface, carries out data loading and output by RS-232, by RS-422 interface and airborne boat Row processor cross-links；Cockpit traffic display cross-links with airborne sail information datatron, connects Receive the data that airborne sail information datatron transmits, provide CPDLC to apply for pilot and ground crew Human-computer interaction interface.

Preferably, described cockpit traffic information display receives the shape that airborne sail information datatron sends State information and CPDLC message information also show, provide for pilot and carry out with ground system The human-computer interaction interface of CPDLC message interaction,

Described cockpit traffic information display receive airborne sail information datatron send status information and CPDLC message information also shows, provides for pilot and carries out CPDLC report with ground system The human-computer interaction interface that literary composition is mutual, for resolving and show the CPDLC report that airborne processor forwards Literary composition information is carried out；For providing for CPDLC message editing and the operation interface of response for pilot；

For receiving the status information that airborne sail information datatron is sent, in conjunction with oneself state information, Application interface is given Big Dipper airborne version subscriber computer, airborne sail information datatron and passenger cabin in real time hand over The duty prompting of logical display；And parameter is set.

Described above is only the general introduction of technical solutions of the utility model, in order to better understand this reality By novel technological means, and can be practiced according to the content of description, below with this utility model Preferred embodiment and coordinate accompanying drawing describe in detail as after.

Accompanying drawing explanation

Fig. 1 shows that the blank pipe emergency management and rescue Beidou communication according to an embodiment of the present utility model is led Boat integral system；

Fig. 2 shows that the Beidou communication navigation integration according to an embodiment of the present utility model is airborne The block diagram of terminal；

Fig. 3 shows the Big Dipper airborne subscriber computer composition frame chart according to an embodiment of the present utility model；

Fig. 4 shows the group recording sail information datatron according to an embodiment of the present utility model Become block diagram；

Fig. 5 shows the cockpit traffic information display composition according to an embodiment of the present utility model Block diagram；

Fig. 6 shows the block diagram of the surface-monitoring equipment according to an embodiment of the present utility model；

Fig. 7 shows the principle frame of the integrated radio-frequency module according to an embodiment of the present utility model Figure；

Fig. 8-1 to 8-3 respectively illustrates employing 3 bits, 2 bits and the amount of 1.5 bit dynamic quantizations Change the simulation figure of threshold value and snr loss；

Fig. 9 shows the anti-fading/low-power consumption front end of combination according to an embodiment of the present utility model Theory diagram；

Figure 10 shows the signal flow of the signal-to-noise ratio (SNR) estimation according to an embodiment of the present utility model Figure；

Figure 11 shows the single cable multi signal transmission signal according to an embodiment of the present utility model Figure.

Detailed description of the invention

By further illustrating that this utility model is by reaching the technology hands that predetermined utility model purpose is taked Section and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the big-dipper satellite that the utility model proposes Its detailed description of the invention of Airborne Terminal, feature and effect thereof, after describing in detail such as.In the following description, What different " embodiments " or " embodiment " referred to is not necessarily same embodiment.Additionally, one or more is real Execute the special characteristic in example, structure or feature to be combined by any suitable form.

In a detailed description of the invention of the present utility model,

As it is shown in figure 1, blank pipe emergency management and rescue Beidou communication navigation integral system includes that Beidou communication is led Boat integral machine mounted terminal and surface-monitoring equipment；

Described surface-monitoring equipment, for receiving the information of Beidou communication navigation integral machine mounted terminal； The aircraft position message that Beidou communication navigation integral machine mounted terminal is sent and pilot's note message Process, generate empty mood gesture；Generate earth-space communication and monitor information；

Described Beidou communication navigation integral machine mounted terminal, is used for providing automatic dependent surveillance (ADS)； Controller communicates (CPDLC) with Pilot Data's chain；And assisting navigation.

According to a detailed description of the invention of the present utility model, described automatic dependent surveillance (ADS) is Refer to, set up communication channel for airborne vehicle with ground air traffic control system and link, the aerial position of real-time exchange airborne vehicle Put, the information such as regulatory service.

According to a detailed description of the invention of the present utility model, described controller is led to Pilot Data's chain It is mutual that letter (CPDLC) refers to that controller and pilot carry out blank pipe information by numeral short message.

According to a detailed description of the invention of the present utility model, described assisting navigation refers to Airborne Terminal profit After exporting information fusion by self poisoning information with aircraft onboard navigation, it is provided that assisting navigation service.

As in figure 2 it is shown, described Beidou communication navigation integral machine mounted terminal includes: the airborne user of the Big Dipper Machine, airborne sail information datatron and cockpit traffic information display；

The airborne subscriber computer of the described Big Dipper, is used for receiving and send Beidou communication information；

Described airborne sail information datatron, be used for airborne vehicle Big Dipper information encoding and decoding task and The airborne navigation information data of combined treatment；

Described cockpit traffic information display, comprises touch screen, shows for information and controls, and being Pilot provides human-computer interaction interface.

Beidou communication navigation integral machine mounted terminal power switch design is at passenger cabin traffic information diaplay device On, when monitor switch closes, to the airborne subscriber computer of the Big Dipper and airborne sail information datatron one Ground signalling, the airborne subscriber computer of the Big Dipper and airborne sail information datatron are opened after receiving ground signalling automatically Machine, airborne sail information datatron start backward cockpit traffic information display output 12V voltage, seat Cabin traffic information diaplay device starts after powering on automatically, enters application interface.

As it is shown on figure 3, the airborne subscriber computer of the described Big Dipper includes antenna and main frame；

Described antenna farther includes:

Power amplifier, for being amplified to long-distance transmissions by low level signal needed in tranmitting frequency The high power levels wanted；

Emission filter, the band stray signal in the output signal filtering power amplifier；

Duplexer, farther includes the Big Dipper and receives LNA unit, emission controlling unit and He Lu Processing unit；

The described Big Dipper receives LNA unit, does radio-frequency front-end process for the Big Dipper receives signal；

Emission controlling unit, for controlling Big Dipper emission power amplifier；

Described conjunction road processing unit, launches signal synthesize for the Big Dipper receives signal and the Big Dipper；

Described main frame farther includes converter module, signal processing module signal, message processing module And power module；

Described converter module includes launching channel and receiving channel, has been used for up/down frequency conversion, gain Balance, intermediate frequency filtering；

Signal processing module, samples for the carrying out simulating low intermediate frequency signal sending converter module here, Simulation low intermediate frequency signal is transformed to time discrete digital signal；Complete docking collect mail number capture, with The demodulation of track, navigation message, time difference measurement；The transmission base band data sending message processing module here is carried out Data after spread spectrum are sent converter module, are produced modulated spread spectrum signal by spread processing；

According to a preferred implementation of the present utility model, described signal processing module is provided with 6 also The reception passage of row and a transmission channel.Receive passage and receive three " Big Dippeves one " of system respectively 6 departures wave beams of satellite (east star, western star, backup star).Transmission channel is by message processing module The transmission base band data sent here carries out spread processing, and send converter module by the data after spread spectrum, and 1615.68MHz carrier wave is modulated, produces modulated spread spectrum signal.

According to a preferred implementation of the present utility model, in order to improve certainty of measurement, signal processing Module uses photocarrier method code ring to follow the tracks of, so that code ring can accurately reflect, follow the tracks of Dynamic Signal, carries The high dynamic property following the tracks of ring.

Described message processing module be used for process to six channel reception data (as to broadcast, The extraction of the information such as public, communication), it is achieved user authorizes.

According to a preferred implementation of the present utility model, described message processing module is also responsible for externally Portion's Interface status detects in real time, explains, after effective order being detected, the order received, Perform corresponding operation.If the related command launched, then according to check-in signal form framing, warp Signal processing module is given after authentication.

Described power module is converter module, signal processing, information by DC/DC conversion module group The modules such as process provide effective reliable various voltages.Each road voltage is all by single DC/DC chip Output, can be to the different electric pressure of each module conveying and the second best in quality power supply of power demand, it is ensured that The work that complete machine is reliable and stable.

According to a preferred implementation of the present utility model, power module also includes electromagnetic interface filter, Well solve the electromagnetic compatibility problem between equipment and system so that equipment and system do not interfere with each other.

According to a preferred implementation of the present utility model, the S-band that " Big Dipper one " satellite is broadcast Exit signal, arrives first at the antenna part of the airborne subscriber computer of the Big Dipper, by the Big Dipper airborne subscriber computer antenna Deliver to collected small-signal receive channel.Receive channel the small-signal of antenna feed to be put Greatly, down coversion, finally export intermediate-freuqncy signal, and intermediate-freuqncy signal delivered at signal processing module Reason.

Signal processing module passes through A/D converting unit, the intermediate-freuqncy signal that reception channel is sent here is adopted Sample quantifies, and the digital sample values of output exit signal, for follow-up reception cell processing.

Receive unit and include that (each passage includes six reception passages: follow the tracks of despread unit, symbolic solution Adjust unit and information decoding unit three part), it is responsible for the departures letter that " Big Dipper one " satellite is forwarded Number I branch road be tracked despreading, symbol demodulation and information decoding respectively.Follow the tracks of despread unit to selected Signal carries out Code acquisition, code tracking and despreading, carries out judgement according to the I branch road information received simultaneously and is No Q tributary signal is de-spread.Digital signal after despreading gives symbol demodulation cell processing.Symbol Number demodulating unit I branch road despread signal to input, first carries out frequency deviation estimation, frequency deviation offsets, then Precision tracking carrier phase and symbol demodulation；Equally, when necessary the symbol of Q branch road is entered simultaneously Row demodulation, the value of symbol demodulated delivers to information decoding unit after three bit quantizations.Information decoding Unit carries out to the three bit quantization numerals of I branch road (Q branch road if desired) of input that Viterbi is soft to be sentenced Certainly decoding, delivers to message processing module by the information data obtained.

Message processing module is used for controlling co-ordination between each unit, can complete six channel reception numbers According to process, including the extraction of information such as communicating, position, broadcast, be public, and by encryption and decryption Module (IC-card or security chip) operates, and completes the deciphering receiving data.Message processing module is also It is responsible for outside interface data is detected in real time, after effective order being detected, performs corresponding operation, Result will be performed return simultaneously.

If message processing module receives communication application etc. launches related command, then according to check-in signal Form generates corresponding text, and text is delivered to encryption/decryption module is encrypted, and will be after encryption Signal processing module given in text, and this text is spread by signal processing module, and with baseband signal Form give converter, converter modulate baseband information to launch carrier wave, and launch a signal give To power amplifier, after power amplification, it is transmitted to satellite by launching antenna.

As shown in Figure 4, described airborne sail information datatron farther includes message processing module (MPM), deposits Memory modules, interface processing module, power source protective module；

Described message processing module (MPM) farther includes:

ADS-C packet parsing module, receives what ground air traffic control system sent for airborne subscriber computer ADS-C contract message, resolves message, and carries out automatically should according to fixing contract form Answer；

ADS-C message assembles module, for airborne subscriber computer receiving position data, and carries out data Analytical Calculation, is then packaged into ADS-C contract message, is sent to the Big Dipper according to setting frequency airborne Subscriber computer thus realize the lower transmission module of ADS-C message；

CPDLC packet parsing module, is used for the CPDLC message information from the airborne subscriber computer of the Big Dipper, And message is carried out dissection process, then send cockpit traffic information display to show；

CPDLC message assembles module, is used for the pilot's response from cockpit traffic information display or master Deliver a letter under Dong breath, and this information form according to the rules is assembled into CPDLC downlink message, then will report Literary composition is sent to the airborne subscriber computer of the Big Dipper, thus realizes passing under CPDLC message；

Described memory module, the various data used for depositing information process to need；

Described interface processing module, comprises 5 serial ports, has the FIFO of 64Bytes, serial ports baud Rate is adjustable, reaches as high as 115.2Kbps；From external reception Big Dipper transceiving data；Airborne ins signal； Pressure altitude signal；Cockpit display data and loading and detection data；

Described power source protective module, is drawn by unified plug, configures power-supply filter, power panel On to male connector all with the plugs and sockets of locking mechanism, to ensure that patch plug is solid and reliable.

According to a preferred implementation of the present utility model, power-supply filter selects to accept + 16V～+36V input, current value is the DC wave filter more than 1A.Power-supply filter is direct Connect firmly structurally, directly fastened by screw.

System uses single+5V to power, and board major part device operating voltages is+5V, core voltage 1.25V, I/O voltage is 3.3V, accordingly, it would be desirable to power pack is carried out the most careful planning.Should In system, use dc-dc, stably export 1.25V, 2.5V and 3.3V, it is ensured that system electricity Can stablize, work normally under conditions of regulation in source.

According to a detailed description of the invention of the present utility model, airborne sail information processor pair external tapping Including:

Subscriber computer airborne with the Big Dipper carries out the RS-422 interface of data crosslinking；Hand over cockpit traffic display The RS-422 interface of connection；Load for data and the RS-232 interface of detection；Carrier aircraft power interface； Standby RS-422 interface: combined treatment airborne navigation data source.

As it is shown in figure 5, described cockpit traffic information display includes display module, processing module, deposits Memory modules, interface processing module and power module.

Cockpit traffic information display is powered by sail information datatron, after the CPU module that powers on starts, Operating system, application program is entered through self-inspection flow processs such as a series of BIOS, internal memory and peripheral interfaces Cross-linked with airborne sail information datatron by RS-422 interface, after the data parsing that will receive Show.Cockpit traffic information display has USB, RS-232 and RS-422 tri-to external Mouthful, carry out data loading and output by RS-232, by RS-422 interface and airborne sail information Datatron cross-links.Cockpit traffic display cross-links with airborne sail information datatron, receives airborne The data that sail information datatron transmits, for pilot and ground crew provide that CPDLC applies man-machine Interactive interface.

Described cockpit traffic information display receive airborne sail information datatron send status information and CPDLC message information also shows, provides for pilot and carries out CPDLC report with ground system The human-computer interaction interface that literary composition is mutual, described cockpit traffic information display receives airborne sail information and processes Status information that machine sends and CPDLC message information showing, provide for pilot and ground System carries out the human-computer interaction interface of CPDLC message interaction, is used for resolving and show airborne information processing The CPDLC message information that machine forwards is carried out；For providing for CPDLC message editing for pilot Operation interface with response；

For receiving the status information that airborne sail information datatron is sent, in conjunction with oneself state information, Application interface is given Big Dipper airborne version subscriber computer, airborne sail information datatron and passenger cabin in real time hand over The duty prompting of logical display；And parameter is set.

Cockpit traffic information display arrange parameter include: management information injection, prefabricated free message, Data derivation etc..

Installing additional of Beidou communication navigation integral machine mounted terminal, it is possible under the conditions of solving blank pipe emergency management and rescue The not enough problem of ground air traffic control system monitoring capacity.

According to a detailed description of the invention of the present utility model, ground air traffic control system is as desired by north Bucket communication function sends contract report to task airborne vehicle, and the airborne subscriber computer of the Big Dipper receives ground blank pipe After the contract report that system is sent, by data-interface, contract report information is passed through airborne navigation and believe Ceasing datatron, airborne sail information datatron is reported according to contract format analysis contract, and according to currently Practical situation automatically edit packing response report information, by data-interface by response report information pass Give the Big Dipper airborne subscriber computer, then utilized Big Dipper generation short message communication function by the airborne subscriber computer of the Big Dipper Response report is sent to ground air traffic control system.

According to a detailed description of the invention of the present utility model, controller divides with Pilot Data's chain communication For uplink and the big class of descending chain two.Ground air traffic control system can be as desired by the short report of a Big Dipper generation Literary composition communication function sends line command on CPDLC to task airborne vehicle, and the airborne subscriber computer of the Big Dipper receives ground After the order that face air traffic control system is sent, by data-interface, the information received is passed through airborne boat Row processor, on airborne sail information processor pair, line command resolves, and will resolve after Information send cockpit traffic information display to show.After pilot sees order, by cockpit traffic information Response message is sent to airborne sail information datatron by display, and airborne sail information datatron should Answer information editing's packing, and be sent to the airborne subscriber computer of the Big Dipper, the Big Dipper airborne subscriber computer response is believed Breath is sent to ground air traffic control system, and same pilot also can send request letter by air traffic control system the most earthward Breath, and wait the response of ground air traffic control system.

As shown in Figure 6, described surface-monitoring equipment includes: Big Dipper commander's subscriber computer, information processing connect Enter equipment, transmission multiple connection equipment and Big Dipper monitor workstation；

Described Big Dipper commander's subscriber computer, for positioning and receive and sending Beidou communication information；Arrange Subordinate user's group and monitor subordinate user group down pass message and commander message upload broadcast；

Described information processing access device, for being converted to Big Dipper ground by the ADS message passed down in the air Message format needed for monitor workstation, and will be from Big Dipper ground monitoring work station ground control's message Be converted into uplink message deliver to the Big Dipper commander subscriber computer be uploaded to Beidou communication navigate integrated airborne end End；

Described transmission multiple connection equipment, between information processing access device and Big Dipper monitor workstation Information forwards；

Described Big Dipper ground monitoring work station, is used for monitoring sky mood gesture, commanding and distribute sky information Literary composition.

By the Big Dipper commander subscriber computer arrange subordinate user's group and monitor under subordinate user's group pass message and That commands message uploads broadcast, it is simple to carry out movable ground monitoring system under the conditions of emergency management and rescue Set up.Big Dipper ground monitoring work station utilizes advanced digital GIS-Geographic Information System to realize based on digitally The empty mood gesture of figure monitors, and sky mood gesture is distributed to other ground air traffic control systems.

According to a detailed description of the invention of the present utility model, described surface-monitoring equipment farther includes: Big Dipper commander subscriber computer A and the Big Dipper commander subscriber computer B, each other Hot Spare.

According to a detailed description of the invention of the present utility model, after the start of described surface-monitoring equipment, north Bucket commander subscriber computer A and Big Dipper commander subscriber computer B is by power-on self-test, and per second process to data is accessed Oneself state of device report, believes including equipment state and the x time whether arriving regulation etc. Breath, accesses Big Dipper monitor workstation through transmission multiple connection equipment and shows in real time.Big Dipper commander subscriber computer A is Primary communication equipment, Big Dipper commander subscriber computer B is standby communication facility, and described surface-monitoring equipment has There is Hot Spare automatic switching capabilities: when Big Dipper commander subscriber computer A is normal, only use Big Dipper commander to use Family machine A sends short message information；When Big Dipper commander subscriber computer A breaks down and Big Dipper commander user When machine B is normal, system automatically switches to Big Dipper commander subscriber computer B and sends up short message information.By In using Hot Spare active configuration, two Taibei bucket commander's subscriber computers will be simultaneously received what airborne vehicle passed down Position report and note code, process through information redundancy and select correct information, improve system further Transmission reliability.

In order to realize Beidou communication navigation integral machine mounted terminal integration, miniaturization and low-power consumption Airborne use requirement, needs transceiver channel is used integrated design.

As it is shown in fig. 7, according to a detailed description of the invention of the present utility model, lead for Beidou communication The reception passage of boat integral machine mounted terminal, wherein reception antenna receives the radiofrequency signal from satellite, Leaching out-of-band interference through preselector, low-noise amplifier provides the gain of about 30dB, further after filtering Enter the first mixing, complete the first time frequency conversion of signal, amplify, filter, then amplified signal is put About 40dB, enters the second mixing, after putting 45dB in two and amplifying, and the intermediate frequency letter of output 0dBm Number remove signal processing module.For the transmission channel of Beidou communication navigation integral machine mounted terminal, by believing The shaped filtering of 4.08MHz spread data streams that number processing module is come, enters phase converter and completes BPSK Modulation, exports 10dBm 1615.68MHz phase-modulated signal, amplifies through preliminary election, promotes power amplifier, The finally output radiofrequency signal more than 40dBm, is launched by launching antenna.

It is more than 110dB owing to receiving channel gain, is therefore easily subject to interference, particularly the least Being also integrated with powerful transmitter in volume, transceiver insulation needs to process especially.Whole in guarantee On the premise of machine noise, need transmitting signal is carried out enough filtering, modulation data are formed place Reason, reduces the out-of-band radiation launching signal；Need reception power supply and transmission power supply are taked quarantine measures, Suppression is by the issuable interference of power supply, and three is indispensable.

According to a detailed description of the invention of the present utility model, airborne for Beidou communication navigation integration The radio circuit of terminal, on chip selects, the chip of widely used high integration replaces original discrete Device；The material of more high-k is selected on material selects；In the distribution of holding wire, adopt more By device underground distribution mode.By multi-layer PCB, paster technique, sintering process miniaturization, specifically Measure is as follows:

1) antenna oscillator miniaturization

Select high dielectric constant material and minimized radiation area, manufacture Novel miniaturization antenna oscillator, subtract Remove antenna external structure and high frequency connectors (such as SMA), antenna oscillator is embedded complete machine structure and sets In meter.

2) receive-transmit isolation

Dual-mode antenna uses plane figure to reduce the directly affecting of dual-mode antenna (spatial domain is overlapping)；Improve sky The receive-transmit isolation (little area radiation face) of line；The spacing strengthening dual-mode antenna of maximum possible reduces sky The mutual Rhizoma Nelumbinis of line；Launching power amplifier design outfan and LNA input filter, it is achieved directly receive and dispatch every Improve from degree.

3) phase modulation balance and carrier wave suppression are launched

Select the modulation of both-end balanced input, baseband signal adds shaping and differential amplifier circuit, subtracts The phase deviation of little modulated signal.Space isolation technology and Phase Compensation is used to solve carrier wave suppression Problem.

4) 10W power amplifier miniaturization

Use class-a amplifier method for designing, reach the more preferable linearity；Control transmitting by power supply to subtract Little complete machine stand-by power consumption；Use embedded design, save 10W power amplifier volume.

5) low-noise amplifier miniaturization

Use embedded design, save low-noise amplifier volume, and ensure complete machine threshold level index.

6) wave filter miniaturization

Using miniaturization dielectric filter at radio-frequency front-end, end uses microstripline filter generation before transmission For cavity body filter, high intermediate frequency (IF) Design uses small-sized SAW filter, adopts at intermediate-frequency section With small package paster LC band filter.

7) Up/Down Conversion device and frequency combine miniaturization

Select or design specialized transceiving radio frequency application-specific integrated circuit, use integrated VCO and the two-way of loop filter Frequency synthesizer IC, by public for the local oscillator receiving passage the first local oscillator and transmission channel, reduces volume fall Low-power consumption.

8) frequency intermodulation and mirror image suppression

Reduce local oscillator quantity, improve local frequency, select optimal local frequency and select suitable group Close design.Each several part local oscillator and clock circuit are carried out shielding.

9) dual mode system electromagnetic interference controls

Power supply is used to control technology and isolated from power technology: the signal close to co-channel interference is used timesharing Process, emitting portion power supply is individually controlled with receiving portion power supply.Use rational cavity and micro-strip Design, reduces the interference between signal.

For making Beidou communication navigation integral machine mounted terminal possess certain anti-fading ability, according to this reality By a novel detailed description of the invention, intermediate-freuqncy signal is exported via after analog digital conversion, pre-filtering Digital signal carry out secondary adaptive quantizing, and reject invalid data, make equipment under fading environment Can normally work, and possess the ability of certain rejecting single-tone jamming, meanwhile, also make signal processing Operand reduce, thus reach low-power consumption effect.

Fig. 8-1 to 8-3 respectively illustrates employing 3 bits, 2 bits and the amount of 1.5 bit dynamic quantizations Change the simulation figure of threshold value and snr loss；By contrast it can be seen that for 2bit situation, when When using optimal quantization value, quantify loss less than 0.6dB；With the bit width making again follow-up signal process Degree greatly reduces.It addition, after using dynamic quantization, receiver will not be by received signal level The impact of fluctuation, the scope at nearly 40dB suffers from good anti-fading ability and the quantization of minimum Loss.This is extremely advantageous for the application of complex environment.It is therefore preferred that select employing 2 Bit carries out dynamic quantization.

As it is shown in figure 9, from the low intermediate frequency signal of radio-frequency module through ADC and pre-filtering module, It is transformed to discrete-time signal and eliminates out-of-band noise (i.e. disturbing signal).Subsequently, believe according to signal Make an uproar than change and post-processing unit estimate noise level, calculate the threshold value of second quantization, and The process of second quantization is carried out according to threshold value.Translate the signals into as 2bit width, to reduce post processing mould The hardware size (and then reduction process power consumption) of block.Dynamically change also meanwhile, it is capable to adapt to signal front end There is the ability of certain rejecting single-tone jamming.

Due to input satellite-signal and the level fluctuation of interference signal, according to fixed threshold, the most very Difficulty is taken into account low and high level and is changed dynamically, according to a detailed description of the invention of the present utility model, uses Dynamic threshold；It is preferably by the estimation to noise level, the estimation of incoming signal level and solution After tune, the estimation of signal to noise ratio obtains optimum dynamic threshold.

After satellite exit signal locks, according to a detailed description of the invention of the present utility model, can root Signal to noise ratio after demodulating is obtained according to signal flow as shown in Figure 10；

Correlator is output as superposing of useful signal and noise power, and can be considered broadband signal, its Carrying a width of 1/T, T is pre-correlation bandwidth.Its power is carried out M time add up, can obtain for:

${\mathrm{WBP}}_k={\left(\underset{i=1}{\overset{M}{\mathrm{\Σ}}}\right(I_i^2+Q_i^2\left)\right)}_k$

After despread, the signal of correlator output is narrow band signal, and power is represented by:

${\mathrm{NBP}}_k={\left(\underset{i=1}{\overset{M}{\mathrm{\Σ}}}{I}_i\right)}_k^2+{\left(\underset{i=1}{\overset{M}{\mathrm{\Σ}}}{Q}_i\right)}_k^2$

By narrow band power normalization, obtain:

${\mathrm{NP}}_k=\frac{{\mathrm{NBP}}_k}{{\mathrm{WBP}}_k}$

Above formula is carried out K accumulation, obtains:

${\widehat{\mathrm{\μ}}}_{NP}=\frac{1}{K}\underset{k=1}{\overset{K}{\mathrm{\Σ}}}{\mathrm{NP}}_k$

Then signal-to-noise ratio (SNR) estimation is represented by:

$\frac{\hat{C}}{N_0}=10log10\left(\frac{1}{T}\frac{{\widehat{\mathrm{\μ}}}_{NP}-1}{M-{\widehat{\mathrm{\μ}}}_{NP}}\right)$

Table 1 shows that employing 8bit quantifies and bis-adaptive quantizing both differences quantization sides of 2bit During formula, hardware platform consumption resource comparison table:

Quantization algorithm type	8bit quantifies	Bis-adaptive quantizings of 2bit
			Combination logic (look-up table LUT)	32170	23109
Depositor	33215	20536
			Logical resource (LE)	37681	26263
Internal RAM (bits)	85341	51880
			Multiplier	43	15

Table 1

Visible by contrast, although this utility model have employed secondary adaptive quantizing, but due to Translating the signals into as 2bit width, (and then reduction processes to need the hardware size of processing module after reducing Power consumption) various resources can save more than 30%.

In the Big Dipper airborne subscriber computer main frame connected mode with antenna, if taking the combination of multi-cable Mode, then need five lines, i.e. two radio-frequency cables to be respectively used to transmitting transceiver two-way Big Dipper radio frequency letter Number, the power supply needed for two power line delivering power amplifiers, one controls the control line that power amplifier is launched. The connected mode of this high-low frequency mixed loading, line is many, and process and assemble is complicated, and reliability is low, and cost is high, And the connection reliability under the high vibration environment of aloft high-speed motion has a greatly reduced quality especially.

According to a detailed description of the invention of the present utility model, use single cable multi signal transmission means, A radio-frequency cable, transmission is utilized to be there is a need to the signal of transmission so that between main frame and aerial head Connect simplicity, drastically increase reliability and the maintainability of connection.

As shown in figure 11, the operation principle of the transmission duplex in utilization communication, utilize duplexer to realize receiving Send out isolation, complete interior feed by cable core, detect radiofrequency signal simultaneously, serve as the switch of power amplifier Control, reach the purpose of full-duplex communication location.

According to a detailed description of the invention of the present utility model,

Blank pipe emergency management and rescue Beidou communication navigation integral system message kind includes following five classes:

(1) infomational message is passed under airborne vehicle

1) effective when airborne location information, and when the Big Dipper airborne subscriber computer delivery time arrives, airborne end End automatically generates aircraft position report, the note code that pilot selects is inserted respective field simultaneously After give in the lump and pass under the airborne subscriber computer of the Big Dipper.

2) invalid when airborne location information, and have pilot when the Big Dipper airborne subscriber computer delivery time arrives Selected short message sends task, and lower fly-by row inserted by the note code that pilot is selected by Airborne Terminal Give after respective field in member's short message message and pass under the airborne subscriber computer of the Big Dipper.

3) invalid when airborne location information, and Airborne Terminal when the Big Dipper airborne subscriber computer delivery time arrives Not having short message to send task, Airborne Terminal sends active location control instruction to the airborne subscriber computer of the Big Dipper, Start the Big Dipper airborne subscriber computer active location application.

(2) control and state message between airborne equipment

1) Airborne Terminal is the airborne end control equipment of system.According to system job demand, can automatically or Manual intervention produces the control message of subscriber computer airborne to the Big Dipper.

2), when normally working, the airborne subscriber computer of the Big Dipper is per second reports an oneself state letter to Airborne Terminal Breath, after receiving the control message that Airborne Terminal sends, carries out response in next state message.

(3) infomational message is uploaded on ground

System ground is uploaded message and is included that infomational message point-to-point is uploaded in ground, ground broadcasts (or multicast) Upload infomational message and control message is uploaded on ground.

(4) ground uploading system controls message (such as mourn in silence, communicate/active location control etc.)

Ground uploading system controls message for controlling the mode of operation/state of airborne equipment, as communication/ Active location selection, radio listening silence control etc..

(5) control and state message between ground installation

Control between ground installation the ground Big Dipper to be referred to for ground Big Dipper monitor workstation with state message The mode of operation waving subscriber computer is controlled obtaining with state.

The above, be only preferred embodiment of the present utility model, not makees this utility model Any pro forma restriction, although this utility model is disclosed above with preferred embodiment, but not In order to limit this utility model, any those skilled in the art, without departing from this utility model skill In art aspects, when the technology contents of available the disclosure above makes a little change or is modified to equivalent change The Equivalent embodiments changed is as long as being the content without departing from technical solutions of the utility model, new according to this practicality Any simple modification, equivalent variations and the modification that above example is made by the technical spirit of type, the most still Belong in the range of technical solutions of the utility model.

Claims (9)

1. a Beidou communication navigation integral machine mounted terminal, including:

The airborne subscriber computer of the Big Dipper, airborne sail information datatron and cockpit traffic information display；

The airborne subscriber computer of the described Big Dipper, is used for receiving and send Beidou communication information；

Described airborne sail information datatron, has been used for encoding and decoding task and the airborne navigation information data of combined treatment of airborne vehicle Big Dipper information；

Described cockpit traffic information display, comprises touch screen, shows for information and controls, and providing human-computer interaction interface for pilot；

The airborne subscriber computer of the described Big Dipper includes antenna and main frame；

Described main frame farther includes converter module, signal processing module signal, message processing module and power module；

Described converter module includes launching channel and receiving channel, has been used for up/down frequency conversion, gain balance, intermediate frequency filtering；

Signal processing module, the carrying out of the simulation low intermediate frequency signal for sending converter module here is sampled, and simulation low intermediate frequency signal is transformed to time discrete digital signal；Complete the capture of the docking collection of letters number, tracking, navigation message demodulation, time difference measurement；The transmission base band data sending message processing module here carries out spread processing, send converter module by the data after spread spectrum, produces modulated spread spectrum signal；

Described message processing module is used for processing reception data；Described process includes but not limited to broadcast, public, the extraction of the communication information, it is achieved user authorizes；

Described power module, including battery module, is used for powering；

Described power module also includes electromagnetic interface filter.

Beidou communication the most according to claim 1 navigation integral machine mounted terminal, it is characterised in that:

Described antenna farther includes:

Power amplifier, for being amplified to the high power levels required for long-distance transmissions in tranmitting frequency by low level signal.

Beidou communication the most according to claim 2 navigation integral machine mounted terminal, it is characterised in that:

Described antenna farther includes:

Emission filter, the band stray signal in the output signal filtering power amplifier.

Beidou communication the most according to claim 3 navigation integral machine mounted terminal, it is characterised in that:

Described antenna farther includes:

Duplexer, farther includes the Big Dipper and receives LNA unit, emission controlling unit and conjunction road processing unit；

The described Big Dipper receives LNA unit, does radio-frequency front-end process for the Big Dipper receives signal；

Emission controlling unit, for controlling Big Dipper emission power amplifier；

Described conjunction road processing unit, launches signal synthesize for the Big Dipper receives signal and the Big Dipper.

Beidou communication the most according to claim 4 navigation integral machine mounted terminal, it is characterised in that:

Described message processing module is also responsible for detecting outside Interface status in real time, explains, after effective order being detected, the order received, performs corresponding operation.

Beidou communication the most according to claim 5 navigation integral machine mounted terminal, it is characterised in that:

Described effective order detected after the order received is explained, perform corresponding operation, particularly as follows: if the related command launched, then according to check-in signal form framing, give signal processing module after authentication.

Beidou communication the most according to claim 6 navigation integral machine mounted terminal, it is characterised in that:

Farther include: memory module, interface processing module, power source protective module；

Described memory module, the various data used for depositing information process to need；

Described interface processing module, comprises 5 serial ports, has the FIFO of 64Bytes, and serial port baud rate is adjustable；From external reception Big Dipper transceiving data；Airborne ins signal；Pressure altitude signal；Cockpit display data and loading and detection data；

Described power source protective module, is drawn by unified plug, on configuration power-supply filter, power panel to male connector all with the plugs and sockets of locking mechanism, to ensure that patch plug is solid and reliable.

Beidou communication the most according to claim 7 navigation integral machine mounted terminal, it is characterised in that:

Airborne sail information processor pair external tapping includes:

Subscriber computer airborne with the Big Dipper carries out the RS-422 interface of data crosslinking；RS-422 interface with the crosslinking of cockpit traffic display；Load for data and the RS-232 interface of detection；Carrier aircraft power interface；Standby RS-422 interface: combined treatment airborne navigation data source.

Beidou communication the most according to claim 8 navigation integral machine mounted terminal, it is characterised in that:

Described cockpit traffic information display has tri-external interfaces of USB, RS-232 and RS-422, is carried out data loading and output by RS-232, is cross-linked with airborne sail information datatron by RS-422 interface；Cockpit traffic display cross-links with airborne sail information datatron, receives the data that airborne sail information datatron transmits, provides the CPDLC human-computer interaction interface applied for pilot and ground crew.