CN205665399U - Low -power consumption big dipper communication navigation airborne terminal - Google Patents

Abstract

The utility model provides a low -power consumption big dipper communication navigation 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, big dipper machine carries the subscriber computer and includes antenna and host computer, the host computer further includes converter module, signal processing module signal, information processing module and power module, signal processing module further will be alternate and has carried out the processing that the secondary quantifys for discrete data signal of time.

Description

A kind of low-power consumption Beidou communication guiding aircraft mounted terminal

Technical field

This utility model belongs to subhost mounted terminal technical field, is specifically related to a kind of low-power consumption Beidou communication navigation airborne 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 the type aircraft such as 12 general-purpose aircrafts, straight 15 Medium Helicopters continue to bring out, especially with Deepening continuously of China's low altitude airspace administrative reform, the fast development day by day of General Aviation market, the airborne vehicle of low altitude flight exists Flight course often faces communication failure, navigate inaccurate, monitor the blind area serious reality technology problem such as big, be also current The airborne equipment technology subject matter that international airline interface is faced.

Summary of the invention

For overcoming above-mentioned the deficiencies in the prior art, this utility model provides a kind of low-power consumption Beidou communication and navigates airborne end End, 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 combination processing machine of airborne vehicle Big Dipper information Carry navigation information data；

Described cockpit traffic information display, shows for information and controls, 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 supply mould Block；

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 is low Intermediate-freuqncy signal is transformed to time discrete digital signal；Complete the capture of the docking collection of letters number, tracking, navigation message demodulation, time difference survey Amount；The transmission base band data sending message processing module here carries out spread processing, send converter module by the data after spread spectrum, produces Raw modulated spread spectrum signal；

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

Described power module, is used for powering；

Described signal processing module will be transformed to time discrete digital signal and carry out the process of second quantization further.

Preferably, the noise electricity that described signal processing module is estimated according to change and the post-processing unit of Signal-to-Noise Flat, calculate second quantization threshold value, and carry out the process of second quantization according to second quantization threshold value.

Preferably, described antenna farther includes:

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

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 conjunction road processing unit；

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

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

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

Preferably, described message processing module is also responsible for detecting outside Interface status in real time, has detected and has gone all out to do one's duty regardless of personal danger After order, the order received is explained, perform corresponding operation.

Preferably, described in effective order detected after the order received is explained, perform corresponding operation, specifically For: if the related command launched, then according to check-in signal form framing, after authentication, give signal processing module.

Preferably, power module also includes electromagnetic interface filter.

Preferably, described airborne sail information datatron farther includes message processing module (MPM), memory module, seam Reason module, power source protective module；

Described message processing module (MPM) farther includes:

ADS-C packet parsing module, for receiving, from the airborne subscriber computer of the Big Dipper, the ADS-C contract that ground air traffic control system sends Formula message, resolves message, and carries out automatic-answering back device according to fixing contract form；

ADS-C message assembles module, is used for from the Big Dipper airborne subscriber computer receiving position data, and carries out data resolving meter Calculate, be then packaged into ADS-C contract message, be sent to the airborne subscriber computer of the Big Dipper according to setting frequency thus realize ADS-C report The biography down of literary composition；

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

CPDLC message assembles module, for receiving under pilot's response or active of cockpit traffic information display Deliver a letter breath, and this information form according to the rules is assembled into CPDLC downlink message, then message is sent to the airborne user of the Big Dipper Machine, 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, and serial port baud rate is adjustable, the highest can Reach 115.2Kbps；From external reception Big Dipper transceiving data；Airborne ins signal；Pressure altitude signal；Cockpit display data with And load 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.

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；RS-422 with the crosslinking of cockpit traffic display Interface；Load for data and the RS-232 interface of detection；Carrier aircraft power interface；Standby RS-422 interface: combined treatment is airborne Navigation data source.

Preferably, described cockpit traffic information display has tri-external interfaces of USB, RS-232 and RS-422, passes through RS-232 is carried out data loading and output, 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, for pilot and ground Diligent personnel provide the CPDLC human-computer interaction interface applied.

Preferably, 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 man-machine interaction circle of CPDLC message interaction with ground system Face,

The CPDLC message information that described cockpit traffic information display is responsible for forwarding airborne processor resolves Display, be responsible for pilot provides for the operation interface of CPDLC message editing and response simultaneously；

Described cockpit traffic information display receives the status information that airborne sail information datatron is sent, then in conjunction with certainly Body status information, provides Big Dipper airborne version subscriber computer, airborne sail information datatron and cockpit traffic on application interface in real time The duty prompting of display；Cockpit traffic information display also has parameter and arranges management function simultaneously, including: management letter Breath injection, prefabricated free message, data derive.

Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model Art means, and can being practiced according to the content of description, below with preferred embodiment of the present utility model and coordinate accompanying drawing detailed Describe in detail bright as after.

Accompanying drawing explanation

Fig. 1 shows that the blank pipe emergency management and rescue Beidou communication navigation integration according to an embodiment of the present utility model is System；

Fig. 2 shows the frame of the Beidou communication navigation integral machine mounted terminal according to an embodiment of the present utility model Figure；

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 composition frame chart recording sail information datatron according to an embodiment of the present utility model；

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

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

Fig. 7 shows the theory diagram of the integrated radio-frequency module according to an embodiment of the present utility model；

Fig. 8-1 to 8-3 respectively illustrates employing 3 bits, 2 bits and the quantization threshold of 1.5 bit dynamic quantizations and noise Simulation figure than loss；

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

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

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

Detailed description of the invention

By further illustrating the technological means and effect that this utility model taked by reaching predetermined utility model purpose, Below in conjunction with accompanying drawing and preferred embodiment, to according to its specific embodiment party of big-dipper satellite Airborne Terminal that the utility model proposes Formula, feature and effect thereof, after describing in detail such as.In the following description, what different " embodiments " or " embodiment " referred to differs Surely it is same embodiment.Additionally, special characteristic, structure or feature in one or more embodiment can be by any suitable form groups Close.

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 Beidou communication navigation integral machine Load equipment and surface-monitoring equipment；

Described surface-monitoring equipment, for receiving the information of Beidou communication navigation integral machine mounted terminal；To Beidou communication Aircraft position message and pilot's note message that navigation integral machine mounted terminal is sent process, and 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 and flight Member's Data-Link communication (CPDLC)；And assisting navigation.

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

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

According to a detailed description of the invention of the present utility model, described assisting navigation refers to that Airborne Terminal utilizes self poisoning After information exports information fusion 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 subscriber computer of the Big Dipper, airborne navigation Processor 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 combination processing machine of airborne vehicle Big Dipper information Carry navigation information data；

Described cockpit traffic information display, shows for information and controls, providing human-computer interaction interface for pilot.

Beidou communication navigation integral machine mounted terminal power switch design, on passenger cabin traffic information diaplay device, works as display During switch Guan Bi, to the airborne subscriber computer of the Big Dipper and one ground signalling of airborne sail information datatron, the airborne subscriber computer of the Big Dipper and Airborne sail information datatron receives Auto Power On after ground signalling, airborne sail information datatron start backward cockpit traffic letter Breath display output 12V voltage, cockpit traffic information display 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 the high power required for long-distance transmissions in tranmitting frequency by low level signal Level；

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 conjunction road processing unit；

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

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

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

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

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 is low Intermediate-freuqncy signal is transformed to time discrete digital signal；Complete the capture of the docking collection of letters number, tracking, navigation message demodulation, time difference survey Amount；The transmission base band data sending message processing module here carries out spread processing, send converter module by the data after spread spectrum, produces Raw modulated spread spectrum signal；

According to a preferred implementation of the present utility model, described signal processing module is provided with 6 parallel receptions and leads to Road and a transmission channel.Reception passage receives three " Big Dipper one " satellites (east star, western star, backup star) of system respectively 6 departures wave beams.The transmission base band data that message processing module is sent here by transmission channel carries out spread processing, and by after spread spectrum Data send converter module, and are modulated 1615.68MHz carrier wave, produce 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 and carries Ripple auxiliary code ring is followed the tracks of, so that code ring can accurately reflect, follow the tracks of Dynamic Signal, improves the dynamic property following the tracks of ring.

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

According to a preferred implementation of the present utility model, described message processing module is also responsible for outside Interface status Detect in real time, after effective order being detected, the order received is explained, perform corresponding operation.If launching Related command, then according to check-in signal form framing, after authentication, give signal processing module.

Described power module is that the modules such as converter module, signal processing, information processing carry by DC/DC conversion module group For effective reliable various voltages.Each road voltage is all to be exported by single DC/DC chip, can be to the different electricity of each module conveying Pressure grade 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 solves 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 exit signal that " Big Dipper one " satellite is broadcast, head First arrive the antenna part of the airborne subscriber computer of the Big Dipper, the Big Dipper airborne subscriber computer antenna deliver to connect by collected small-signal Collection of letters road.The small-signal of antenna feed is amplified by reception channel, down coversion, finally exports intermediate-freuqncy signal, and by intermediate-freuqncy signal Deliver to signal processing module process.

Signal processing module passes through A/D converting unit, the intermediate-freuqncy signal that reception channel is sent here is carried out sample quantization, output The digital sample values of 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, symbol demodulation unit and information Decoding unit three part), be responsible for the I branch road of the exit signal that " Big Dipper one " satellite is forwarded is tracked respectively despreading, Symbol demodulation and information decoding.Follow the tracks of despread unit and carry out Code acquisition, code tracking and despreading to signals selected, simultaneously according to reception To I branch road information carry out judging whether Q tributary signal is de-spread.Digital signal after despreading gives symbol demodulation unit Process.The symbol demodulation 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 demodulated simultaneously, the value of symbol warp demodulated Information decoding unit is delivered to after crossing three bit quantizations.The information decoding unit three bits to the I branch road (Q branch road if desired) of input Quantify numeral and carry out Viterbi Soft decision decoding, the information data obtained is delivered to message processing module.

Message processing module is used for controlling co-ordination between each unit, can complete the process of six channel reception data, Including the extraction of information such as communicating, position, broadcast, be public, and by encryption/decryption module (IC-card or security chip) is operated, complete Receive the deciphering of data in pairs.Message processing module is also responsible for detecting outside interface data in real time, has detected and has gone all out to do one's duty regardless of personal danger After order, perform corresponding operation, result will be performed simultaneously and return.

If message processing module receives communication application etc. launches related command, then generate phase according to check-in signal form The text answered, and encryption/decryption module is delivered in text be encrypted, and give signal processing module, signal by the text after encryption This text is spread by processing module, and gives converter with the form of baseband signal, and converter arrives modulate baseband information Launch carrier wave, and give power amplifier launching signal, after power amplification, be transmitted to satellite by launching antenna.

As shown in Figure 4, described airborne sail information datatron farther includes message processing module (MPM), memory module, connects Mouth processing module, power source protective module；

Described message processing module (MPM) farther includes:

ADS-C packet parsing module, for receiving, from the airborne subscriber computer of the Big Dipper, the ADS-C contract that ground air traffic control system sends Formula message, resolves message, and carries out automatic-answering back device according to fixing contract form；

ADS-C message assembles module, is used for from the Big Dipper airborne subscriber computer receiving position data, and carries out data resolving meter Calculate, be then packaged into ADS-C contract message, be sent to the airborne subscriber computer of the Big Dipper according to setting frequency thus realize ADS-C report The biography down of literary composition；

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

CPDLC message assembles module, for receiving under pilot's response or active of cockpit traffic information display Deliver a letter breath, and this information form according to the rules is assembled into CPDLC downlink message, then message is sent to the airborne user of the Big Dipper Machine, 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, and serial port baud rate is adjustable, the highest can Reach 115.2Kbps；From external reception Big Dipper transceiving data；Airborne ins signal；Pressure altitude signal；Cockpit display data with And load 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.

According to a preferred implementation of the present utility model, it is defeated that power-supply filter selects can to accept+16V～+36V Entering, current value is the DC wave filter more than 1A.Power-supply filter directly connects firmly structurally, directly solid by screw Tightly.

System uses single+5V to power, and board major part device operating voltages is+5V, core voltage 1.25V, and I/O voltage is 3.3V, accordingly, it would be desirable to carry out the most careful planning to power pack.In this system, use dc-dc, stable output 1.25V, 2.5V and 3.3V, it is ensured that system power supply can be stablized, work normally under conditions of regulation.

According to a detailed description of the invention of the present utility model, 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 with the crosslinking of cockpit traffic display Interface；Load for data and the RS-232 interface of detection；Carrier aircraft power interface；Standby RS-422 interface: combined treatment is airborne Navigation data source.

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

Cockpit traffic information display is powered by sail information datatron, after the CPU module that powers on starts, through a series of The self-inspection flow process such as BIOS, internal memory and peripheral interface enter operating system, application program is by RS-422 interface and airborne navigation Processor cross-links, and shows after the data parsing that will receive.Cockpit traffic information display has USB, RS- 232 and RS-422 tri-external interfaces, carry out data loading and output by RS-232, by RS-422 interface and airborne navigation Processor cross-links.Cockpit traffic display cross-links with airborne sail information datatron, receives at airborne sail information The data that reason machine transmits, provide the CPDLC human-computer interaction interface applied for pilot and ground crew.

Described cockpit traffic information display receives status information and the CPDLC message that airborne sail information datatron sends Information also shows, provides for pilot and carries out the human-computer interaction interface of CPDLC message interaction, Ke Yishi with ground system Existing:

(1) CPDLC message shows and sends request function

It is aobvious that the CPDLC message information that cockpit traffic information display is responsible for forwarding airborne processor carries out parsing Showing, be responsible for pilot provides for the operation interface of CPDLC message editing and response simultaneously.

(2) system maintenance function

Cockpit traffic information display receives the status information that airborne sail information datatron is sent, then in conjunction with self shape State information, provides Big Dipper airborne version subscriber computer, airborne sail information datatron and cockpit traffic on application interface in real time and shows The duty prompting of device.Cockpit traffic information display also has parameter and arranges management function simultaneously, including: management information note Enter, prefabricated free message, data derivation etc..

Installing additional of Beidou communication navigation integral machine mounted terminal, it is possible to solve the ground blank pipe under the conditions of blank pipe emergency management and rescue The problem of system monitoring scarce capacity.

According to a detailed description of the invention of the present utility model, ground air traffic control system is as desired by Beidou communication function Contract report is sent to task airborne vehicle, after the airborne subscriber computer of the Big Dipper receives the contract report that ground air traffic control system is sent, logical Crossing data-interface and contract report information passes through airborne sail information datatron, airborne sail information datatron is according to contract lattice Formula resolves contract report, and automatically edits packing response report information according to current practical situation, should by data-interface Answer report information and send the airborne subscriber computer of the Big Dipper to, then utilized Big Dipper generation short message communication function to incite somebody to action 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 and Pilot Data's chain communication be divided into uplink and The descending big class of chain two.Ground air traffic control system can be sent out to task airborne vehicle as desired by Big Dipper generation short message communication function Send line command on CPDLC, after the airborne subscriber computer of the Big Dipper receives the order that ground air traffic control system is sent, by data-interface, will The information received passes through airborne sail information datatron, and on airborne sail information processor pair, line command resolves, and Information after resolving send cockpit traffic information display to show.After pilot sees order, shown by cockpit traffic information Response message is sent to airborne sail information datatron by device, and response message editor is packed by airborne sail information datatron, and It is sent to the airborne subscriber computer of the Big Dipper, the Big Dipper airborne subscriber computer response message is sent to ground air traffic control system, same pilot Also can send solicited message by air traffic control system the most earthward, 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 access device, transmission are again Connect equipment and Big Dipper monitor workstation；

Described Big Dipper commander's subscriber computer, for positioning and receive and sending Beidou communication information；Subordinate user's group is set 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 monitoring work station by the ADS message passed down in the air Required message format, and uplink message will be converted into from Big Dipper ground monitoring work station ground control's message and deliver to the Big Dipper and refer to Wave subscriber computer and be uploaded to Beidou communication navigation integral machine mounted terminal；

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

Described Big Dipper ground monitoring work station, is used for monitoring sky mood gesture, commands and distributes sky information literary composition.

By arranging subordinate user's group at Big Dipper commander's subscriber computer and monitoring biography message and commander's message under subordinate user's group Upload broadcast, it is simple under the conditions of emergency management and rescue, carry out the erection of movable ground monitoring system.Big Dipper ground monitoring works Stand and utilize advanced digital GIS-Geographic Information System to realize empty mood gesture based on numerical map supervision, 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: the Big Dipper is commanded 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, Big Dipper commander user Machine A and Big Dipper commander subscriber computer B by power-on self-test, per second processes an access device oneself state of report to data, including Equipment state and whether arrive the information such as x time of regulation, accesses Big Dipper monitor workstation through transmission multiple connection equipment real-time Display.Big Dipper commander subscriber computer A is primary communication equipment, and Big Dipper commander subscriber computer B is standby communication facility, described ground monitoring Equipment has Hot Spare automatic switching capabilities: when Big Dipper commander subscriber computer A is normal, only uses Big Dipper commander subscriber computer A to send Short message information；When Big Dipper commander subscriber computer A breaks down, Big Dipper commander subscriber computer B is normal, system automatically switches to north Bucket commander subscriber computer B sends up short message information.Owing to using Hot Spare active configuration, two Taibei bucket commander's subscriber computers will be with Time receive the position report and note code that airborne vehicle passes down, process through information redundancy and select correct information, carry further The transmission reliability of high system.

Want to realize the airborne use of Beidou communication navigation integral machine mounted terminal integration, miniaturization and low-power consumption Ask, need 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, airborne for Beidou communication navigation integration The reception passage of terminal, wherein reception antenna receives the radiofrequency signal from satellite, leaches out-of-band interference, low noise through preselector Acoustic amplifier provides the gain of about 30dB, enters further the first mixing after filtering, complete the first time frequency conversion of signal, amplification, Filtering, the more exaggerated about 40dB of amplified signal, enter the second mixing, after putting 45dB in two and amplifying, and the intermediate frequency of output 0dBm Signal removes signal processing module.For the transmission channel of Beidou communication navigation integral machine mounted terminal, come signal processing module The shaped filtering of 4.08MHz spread data streams, enter phase converter complete BPSK modulation, export 10dBm 1615.68MHz phase modulation Signal, amplifies through preliminary election, promotes power amplifier, the finally output radiofrequency signal more than 40dBm, is launched by launching antenna Go.

It is more than 110dB owing to receiving channel gain, is therefore easily subject to interference, particularly the most integrated in the least volume Having powerful transmitter, transceiver insulation needs to process especially.On the premise of ensureing total noise of centrifuge, need launching letter Number carry out enough filtering, modulation data are formed process, reduces the out-of-band radiation launching signal；Need receiving power supply And send power supply and take 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, for the radio frequency of Beidou communication navigation integral machine mounted terminal Circuit, on chip selects, the chip of widely used high integration replaces original discrete device；Select more on material selects The material of high-k；In the distribution of holding wire, many employing device underground distribution modes.By multi-layer PCB, paster work Skill, sintering process miniaturization, concrete measure is as follows:

1) antenna oscillator miniaturization

Select high dielectric constant material and minimized radiation area, manufacture Novel miniaturization antenna oscillator, deduct outside antenna Structure and high frequency connectors (such as SMA), embed antenna oscillator in complete machine structure design.

2) receive-transmit isolation

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

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, reduces modulated signal Phase deviation.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 to launch by power supply and reduce the standby merit of complete machine 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 to replace cavity filtering before transmission Device, uses small-sized SAW filter in high intermediate frequency (IF) Design, uses small package paster LC band filter at intermediate-frequency section.

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 frequency synthesizer of loop filter IC, by public for the local oscillator receiving passage the first local oscillator and transmission channel, reduce volume and reduces power consumption.

8) frequency intermodulation and mirror image suppression

Reduce local oscillator quantity, improve local frequency, select optimal local frequency and select suitable modular design scheme. 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 to be used time-division processing, will send out Penetrate partial power individually to control with receiving portion power supply.Use rational cavity and micro-strip design, reduce the interference between signal.

For making Beidou communication navigation integral machine mounted terminal possess certain anti-fading ability, according to of the present utility model one Individual detailed description of the invention, carries out secondary self adaptation for intermediate-freuqncy signal via the digital signal of output after analog digital conversion, pre-filtering Quantify, and reject invalid data, make equipment can normally work under fading environment, and possess the energy of certain rejecting single-tone jamming Power, meanwhile, also makes the operand of signal processing reduce, thus reaches low-power consumption effect.

Fig. 8-1 to 8-3 respectively illustrates employing 3 bits, 2 bits and the quantization threshold of 1.5 bit dynamic quantizations and noise Simulation figure than loss；By contrast it can be seen that for 2bit situation, when using optimal quantization value, quantify loss not Foot 0.6dB；Greatly reduce with the bit width making follow-up signal process again.It addition, after using dynamic quantization, receiver Will not be fluctuated by received signal level and be affected, the scope at nearly 40dB suffers from good anti-fading ability and minimum Quantization loss.This is extremely advantageous for the application of complex environment.It is therefore preferred that select to use 2 bits to carry out dynamically Quantify.

As it is shown in figure 9, from the low intermediate frequency signal of radio-frequency module through ADC and pre-filtering module, when being transformed to discrete Between signal eliminate out-of-band noise (i.e. disturbing signal).Subsequently, change and post-processing unit according to Signal-to-Noise are estimated The noise level of meter, calculates the threshold value of second quantization, and carries out the process of second quantization according to threshold value.Translate the signals into for 2bit width, to reduce the hardware size (and then reduction process power consumption) of post-processing module.Move meanwhile, it is capable to adapt to signal front end State changes and has the ability of certain rejecting single-tone jamming.

Due to input satellite-signal and the level fluctuation of interference signal, according to fixed threshold, then it is difficult to take into account height Level changes dynamically, according to a detailed description of the invention of the present utility model, uses dynamic threshold；It is preferably by making an uproar After the estimation of vocal level, the estimation of incoming signal level and demodulation, 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 be according to such as Figure 10 institute The signal flow shown obtains signal to noise ratio after demodulation；

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

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

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:

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

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

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

When table 1 shows employing 8bit quantization and bis-adaptive quantizing both difference quantification manners of 2bit, hardware Platform consumption resource comparison table:

Table 1

Visible, although this utility model have employed secondary adaptive quantizing, but owing to translating the signals into by contrast For 2bit width, hardware size (and then reduction process power consumption) the various resources of processing module after reducing, are needed to save More than 30%.

In the Big Dipper airborne subscriber computer main frame connected mode with antenna, if taking the compound mode of multi-cable, then need Wanting five lines, i.e. two radio-frequency cables to be respectively used to transmitting transceiver two-way Big Dipper radiofrequency signal, two power line delivering powers are put Power supply needed for big device, one controls the control line that power amplifier is launched.The connected mode of this high-low frequency mixed loading, line is many, processing Assembling complexity, reliability is low, and cost is high, and the biggest discounting of connection reliability under the high vibration environment of aloft high-speed motion Button.

According to a detailed description of the invention of the present utility model, use single cable multi signal transmission means, utilize one to penetrate Frequently cable, transmission be there is a need to the signal of transmission so that the connection between main frame and aerial head is easy, drastically increases connection Reliability and maintainability.

As shown in figure 11, the operation principle of the transmission duplex in utilization communication, utilize duplexer to realize transceiver insulation, pass through Cable core completes interior feed, detects RF small signals simultaneously, serves as the on-off control of power amplifier, reaches full-duplex communication location Purpose.

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 Terminal automatically generates Aircraft position is reported, gives the Big Dipper airborne subscriber computer in the lump after the note code that pilot selects being inserted respective field simultaneously Under pass.

2) invalid when airborne location information, and short disappearing of having when the Big Dipper airborne subscriber computer delivery time arrives that pilot selectes Breath transmission task, the respective field in lower fly-by office staff's short message message inserted by the note code that pilot is selected by Airborne Terminal After give and pass under the airborne subscriber computer of the Big Dipper.

3) invalid when airborne location information, and when the Big Dipper airborne subscriber computer delivery time arrives, Airborne Terminal does not has short message Transmission task, Airborne Terminal sends active location control instruction to the airborne subscriber computer of the Big Dipper, starts the airborne subscriber computer of the Big Dipper 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, automatic or manual can intervene and produce The control message of raw 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 information to Airborne Terminal, when receiving After the control message that Airborne Terminal sends, in next state message, carry out response.

(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) and uploads information report Control message is uploaded on literary composition and ground.

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

Ground uploading system controls message and is used for controlling the mode of operation/state of airborne equipment, as communication/active location selects Select, radio listening silence control etc..

(5) control and state message between ground installation

Control between ground installation for ground Big Dipper monitor workstation, the ground Big Dipper to be commanded subscriber computer with state message Mode of operation be controlled and state obtain.

The above, be only preferred embodiment of the present utility model, not this utility model is made any in form Restriction, although this utility model is disclosed above with preferred embodiment, but is not limited to this utility model, any ripe Know professional and technical personnel, in the range of without departing from technical solutions of the utility model, when in the technology of available the disclosure above Hold and make a little change or be modified to the Equivalent embodiments of equivalent variations, as long as without departing from technical solutions of the utility model Hold, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, the most still Belong in the range of technical solutions of the utility model.

Claims (9)

1. a low-power consumption Beidou communication guiding aircraft 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 the encoding and decoding task of airborne vehicle Big Dipper information and combined treatment is airborne leads Boat information data；

Described cockpit traffic information display, shows for information and controls, 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 will simulate Low Medium 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；Right The transmission base band data that message processing module is sent here carries out spread processing, send converter module by the data after spread spectrum, produces and adjust Spread-spectrum signal processed；

Described message processing module is used for processing reception data；Described process includes broadcast, public, the extraction of the communication information, Realize user to authorize；

Described power module, is used for powering；

Described signal processing module will be transformed to time discrete digital signal and carry out the process of second quantization further；

Described airborne sail information datatron farther includes message processing module (MPM), memory module, interface processing module, power supply Protection module；

Described message processing module (MPM) farther includes:

ADS-C packet parsing module, for receiving, from the airborne subscriber computer of the Big Dipper, the ADS-C contract report that ground air traffic control system sends Literary composition, resolves message, and carries out automatic-answering back device according to fixing contract form；

ADS-C message assembles module, is used for from the Big Dipper airborne subscriber computer receiving position data, and data are carried out analytical Calculation, Then it is packaged into ADS-C contract message, is sent to the airborne subscriber computer of the Big Dipper according to setting frequency thus realizes ADS-C message Biography down；

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

CPDLC message assembles module, delivers a letter under pilot's response or active of cockpit traffic information display for receiving Breath, and this information form according to the rules is assembled into CPDLC downlink message, then 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, 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, whole to male connector on configuration power-supply filter, power panel With the plugs and sockets of locking mechanism, to ensure that patch plug is solid and reliable.

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 1, it is characterised in that: described signal processing mould The noise level that tuber is estimated according to the change of Signal-to-Noise and post-processing unit, calculates second quantization threshold value, and according to Second quantization threshold value carries out the process of second quantization.

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 1 and 2, it is characterised in that:

Described antenna farther includes:

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

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 conjunction road processing unit；

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

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

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

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 3, it is characterised in that:

Described message processing module is also responsible for detecting, outside Interface status to receiving after effective order being detected in real time Order explain, perform corresponding operation.

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 4, it is characterised in that:

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

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 5, it is characterised in that:

Power module also includes electromagnetic interface filter.

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 6, 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；Connect with the RS-422 of cockpit traffic display crosslinking Mouthful；Load for data and the RS-232 interface of detection；Carrier aircraft power interface；Standby RS-422 interface: combined treatment is airborne to be led Boat data source.

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 7, it is characterised in that:

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

Low-power consumption Beidou communication guiding aircraft mounted terminal the most according to claim 8, it is characterised in that:

Described cockpit traffic information display receives status information and the CPDLC message information that airborne sail information datatron sends And show, provide for pilot and carry out the human-computer interaction interface of CPDLC message interaction with ground system, for resolving also Show the CPDLC message information that airborne processor forwards, provide for CPDLC message editing and the behaviour of response for pilot Make interface；Receive the status information that airborne sail information datatron is sent, then in conjunction with oneself state information, on application interface Provide the duty prompting of Big Dipper airborne version subscriber computer, airborne sail information datatron and cockpit traffic display in real time.