CN109039423A - AOS data frame structure and its solution frame method suitable for low signal-to-noise ratio channel - Google Patents
AOS data frame structure and its solution frame method suitable for low signal-to-noise ratio channel Download PDFInfo
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- CN109039423A CN109039423A CN201810683969.1A CN201810683969A CN109039423A CN 109039423 A CN109039423 A CN 109039423A CN 201810683969 A CN201810683969 A CN 201810683969A CN 109039423 A CN109039423 A CN 109039423A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0008—Synchronisation information channels, e.g. clock distribution lines
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Abstract
The present invention provides a kind of AOS data frame structure suitable for low signal-to-noise ratio channel and its solution frame methods, the AOS data frame structure includes synchronizing frame head, aircraft mark, virtual channel identification, version number, frame count, signal domain, input area, data field, check bit, virtual channel identification is load data channel mark on star, characterizes the classification of different loads data on star.Invention enhances the correctness of virtual channel identifier judgement, also improve the correctness of load data distribution.
Description
Technical field
The present invention relates to a kind of AOS data frame structure and its solution frame methods, and in particular, to one kind is suitable for low signal-to-noise ratio
The AOS data frame structure and its solution frame method of channel.
Background technique
Influence of the data transmission link vulnerable to factors such as weather, environment of Satellite ground.In the AOS system of multi-load aircraft
In, a variety of load datas share same physical channel, and different load datas is time-multiplexed using different pseudo channels
Transmission, each pseudo channel distinguish load data using a unique VCID.In the Gaussian channel of low signal-to-noise ratio
In, even if using effective channel in system examines Error Correction of Coding measure, still had after ground carries out channel decoding remaining
Error code exists.And when these error codes appear in the position of VCID, a kind of may be that the frame data are distributed to the virtual of mistake
In channel, alternatively possible is to abandon the frame data, but no matter go up any possibility, can all cause the mistake of payload data
Disorderly, " error code diffusion " is caused to a certain extent.Therefore, it to the overloading G system for working in low signal-to-noise ratio channel, needs pair
VCID is effectively protected, to further decrease the Loss Rate of data packet.
In general AOS data frame structure, come by RS (10, the 6) coding of shortening in the part in CVCDU frame head
Appearance is protected.It is well known that RS decoding need to be realized by Berlekamp-Messesy algorithm or Euclidean algorithm, it is multiple
Miscellaneous degree is higher, especially for software-based high-throughput (Gbps) real-time transmission system, realizes more difficult.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of AOS numbers suitable for low signal-to-noise ratio channel
According to frame structure and its solution frame method, which increase the correctness of virtual channel identifier judgement, also improve load data distribution
Correctness.
According to an aspect of the present invention, a kind of AOS data frame structure suitable for low signal-to-noise ratio channel, feature are provided
Be, including synchronizing frame head, aircraft mark, the virtual channel identification, version number, frame count, signal domain, input area, data field,
Check bit, virtual channel identification are load data channel mark on star, characterize the classification of different loads data on star.
The present invention also provides a kind of solution frame method of AOS data frame structure suitable for low signal-to-noise ratio channel, feature exists
In, comprising the following steps: data processor carries out framing to inhomogeneity load data by AOS frame format on Satellite, emitted
After machine coding, scrambling, modulation, power amplification, ground installation is sent to carry out reception processing；Ground surface high speed data demodulator is to receiving
Signal demodulated after, send number to pass server initial data and carry out AOS solution frame format and distribution processor, number passes server root
Load type is judged according to the VCID in AOS frame, is finally sent corresponding landing load to test terminal the data after solution format, is completed
Analysis to load data on star.
Preferably, the step 1 is that different type input load data respectively distribute a pseudo channel, and every circuit-switched data is equal
Corresponding to a piece of FIFO.
Preferably, the step 2 passes through number transmission transmitter prime completion channel coding, data scrambling and modulation function, raw
At radiofrequency signal.
Preferably, radiofrequency signal is downconverted to intermediate-freuqncy signal by ground low-converter by the step 3；Noise occurs
Device is superimposed the white Gaussian noise in a broadband on intermediate frequency, and the power spectral density of pad value and noise to signal is settable；It is high
Fast data receiver completes the demodulation of intermediate-freuqncy signal, decoding process, obtains by the decoded data frame of channel, and gigabit ether
Network interface is transmitted to number and passes server.
Compared with prior art, the present invention is with following the utility model has the advantages that invention enhances virtual channel identifiers to sentence
Disconnected correctness also improves the correctness of load data distribution.The present invention solves satellite-terrestrial links low signal-to-noise ratio situation
The technical problem of distribution mistake easily occurs for lower load data transmission, rises to satellite-ground data link transmission bit error rate is reduced
To certain effect.The present invention to VCID protect can to avoid data mistake distribution after lose.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the schematic diagram for the AOS data frame structure that the present invention is suitable for low signal-to-noise ratio channel.
Fig. 2 is star-ground data link process flow diagram.
Fig. 3 is that ground VCID adjudicates schematic diagram.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
As shown in Figure 1, the AOS data frame structure that the present invention is suitable for low signal-to-noise ratio channel includes synchronizing frame head, aircraft
Mark, virtual channel identification (VCID), version number, frame count, signal domain, input area, data field, check bit, pseudo channel mark
Knowing is load data channel mark on star, characterizes the classification of different loads data on star；Synchronizing frame head is used for the synchronization of data, flies
Row device mark characterization aircraft type, data field is all kinds of load datas, and check bit is for filling channel coding check information.
The present invention be suitable for low signal-to-noise ratio channel AOS data frame structure solution frame method the following steps are included:
Step 1: data processor carries out framing to different loads data according to AOS frame format on Satellite.For inhomogeneity
Type input load data respectively distribute a pseudo channel, and every circuit-switched data both corresponds to a piece of FIFO (first in first out).When any
After FIFO is filled with 872 bytes, that is, the logic scheduling unit of a state value to pseudo channel is issued, thus unit is according to load data
The data that the sort algorithms such as amount, priority read a certain load are formatted processing.I.e. according to frame format shown in FIG. 1 to each
Class load data is formatted framing.
Step 2: channel coding, scrambling, modulation, power amplification are carried out to data after framing.Number transmission transmitter prime is completed
Channel coding, data scrambling and modulation function generate radiofrequency signal.
Step 3: ground surface high speed data demodulator demodulates the signal received.Ground low-converter believes radio frequency
Number downconvert to intermediate-freuqncy signal (720MHz)；Noise generator is superimposed the Gauss white noise in a broadband on intermediate frequency (720MHz)
The power spectral density of sound, pad value and noise to signal is settable；High speed data receiver completes the demodulation of intermediate-freuqncy signal, solution
Code processing is obtained by the decoded data frame of channel, and gigabit Ethernet oral instructions transport to number and pass server；
Step 4: number passes server and judges load type according to the VCID in AOS frame.Number passes server in AOS frame
When VCID is judged, using following steps: reading 3 groups of VCID data in every frame AOS frame；To three groups by bit to VCID from height
To the low judgement for carrying out every bit data, the method adjudicated using two from three, if having in 3 bits 2 bits the above are 0 if judgement be
0, judgement is 1 if having 2 bits to be 1 in 3 bits.
The present invention is suitable for the solution frame method of the AOS data frame structure of low signal-to-noise ratio channel the following steps are included: Satellite
Upper data processor carries out framing to inhomogeneity load data by AOS frame format, and emitted machine coding, scrambling, modulation, power are put
After big, ground installation is sent to carry out reception processing；It, will be original after ground surface high speed data demodulator demodulates the signal received
Data send number to pass server and carry out AOS solution frame format and distribution processor, and number passes server and judges load according to the VCID in AOS frame
Data after solution format are finally sent corresponding landing load to test terminal, complete the analysis to load data on star by type.
When number biography server judges VCID in AOS frame, using following steps: reading 3 groups of VCID in every frame AOS frame
Data；The judgement that three groups carry out VCID by bit with every bit data from high to low, the method adjudicated using two from three, if 3
Having 2 bits to adjudicate in bit the above are 0 is 0, and judgement is 1 if having 2 bits to be 1 in 3 bits.
In the figure on star data processor realize data frame framing function, generate data frame structure proposed in this paper；Number
Transmission transmitter prime completes channel coding, data scrambling and modulation function, generates radiofrequency signal；Ground low-converter believes radio frequency
Number downconvert to intermediate-freuqncy signal (720MHz)；Noise generator is superimposed the Gauss white noise in a broadband on intermediate frequency (720MHz)
The power spectral density of sound, pad value and noise to signal is settable；High speed data receiver completes the demodulation of intermediate-freuqncy signal, solution
Code processing is obtained by the decoded data frame of channel, and gigabit Ethernet oral instructions transport to number and pass server；Number passes server and adopts
" 3 take 2 " is carried out to the VCID in data frame structure with algorithm proposed in this paper to differentiate, and the fixed data in data field is carried out
Error code compares.
It when being verified, is sent on star and fills frame data (virtual channel identification is fixed as ' 111111 '), in data field
Fixed data be " 55AA ... ".Test, which is divided into, to be carried out " triplication redundancy " protection to VCID and protects two kinds of works without " triplication redundancy "
Condition.Test result is as shown in the table.As can be seen from the table, after using VCID " triplication redundancy " Preservation tactics, when channel misses
When code rate is the 10-6 order of magnitude, the error rate (i.e. system packet loss) of VCID reduces about 500 times；When channel bit error rate is 10-7
When the order of magnitude, the error rate (system packet loss) of VCID at least reduces about 1200 times.Simulation results sufficiently demonstrate
The validity of VCID " triplication redundancy " strategy, performance boost clearly, as shown in table 1.
1 inventive energy test case table of table
The present invention passes frame format to traditional AOS number and is improved, in insert district to virtual channel identifier (VCID)
Progress back up twice；After ground receiver to satellite data, the three parts of virtual channel identifiers received are carried out at error correction
Reason and judgement, enhance the correctness of virtual channel identifier judgement, also improve the correctness of load data distribution.The present invention
The wrong technical problem of distribution easily occurs for load data transmission in the case of solving satellite-terrestrial links low signal-to-noise ratio, to reduction
Satellite-ground data link transmission bit error rate plays certain effect.The present invention protects VCID can be to avoid data
Mistake distribution after lose.Frame structure of the invention was not only compatible with universal AOS data frame structure holding, but also strengthened pair
The protection of VCID.For On-Star system, do not need to carry out RS encoding operation, it is only necessary to put three parts of same VCID information
Set different location in the frame structure；For ground system, need to only 2 judgements be taken to the 3 of VCID, to guarantee the height of system
Throughput.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (5)
1. a kind of AOS data frame structure suitable for low signal-to-noise ratio channel, which is characterized in that including synchronizing frame head, aircraft mark
Knowledge, virtual channel identification, version number, frame count, signal domain, input area, data field, check bit, virtual channel identification are on star
Load data channel logo characterizes the classification of different loads data on star.
2. a kind of solution frame method of the AOS data frame structure suitable for low signal-to-noise ratio channel, which is characterized in that including following step
Rapid: step 1, data processor carries out framing, step 2, to framing to inhomogeneity load data by AOS frame format on Satellite
Data carry out channel coding, scrambling, modulation, power amplification afterwards；Step 3, ground surface high speed data demodulator is to the signal received
It is demodulated；Step 4, number pass server and judge load type according to the VCID in AOS frame.
3. the solution frame method of the AOS data frame structure according to claim 2 suitable for low signal-to-noise ratio channel, feature exist
In the step 1 is that different type input load data respectively distribute a pseudo channel, and every circuit-switched data both corresponds to a piece of
FIFO。
4. the solution frame method of the AOS data frame structure according to claim 3 suitable for low signal-to-noise ratio channel, feature exist
In the step 2 passes through number transmission transmitter prime and completes channel coding, data scrambling and modulation function, generates radiofrequency signal.
5. the solution frame method of the AOS data frame structure according to claim 4 suitable for low signal-to-noise ratio channel, feature exist
In radiofrequency signal is downconverted to intermediate-freuqncy signal by ground low-converter by the step 3；Noise generator is folded on intermediate frequency
The power spectral density of the white Gaussian noise for adding a broadband, pad value and noise to signal is settable；High speed data receiver
Demodulation, the decoding process for completing intermediate-freuqncy signal, obtain by the decoded data frame of channel, and number is transported in gigabit Ethernet oral instructions
Pass server.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838886A (en) * | 2020-12-22 | 2021-05-25 | 浙江吉利控股集团有限公司 | Data processing method, device and equipment for small satellite and storage medium |
| CN112968750A (en) * | 2021-01-11 | 2021-06-15 | 西安交通大学 | Satellite image compressed data block analysis method and system based on AOS frame |
| CN116846515A (en) * | 2023-07-07 | 2023-10-03 | 中国科学院空天信息创新研究院 | AOS frame effective data extraction method, device, equipment and medium |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002223186A (en) * | 2001-01-25 | 2002-08-09 | Mitsubishi Electric Corp | Satellite observation system |
| CN101527584A (en) * | 2009-03-16 | 2009-09-09 | 哈尔滨工程大学 | Spread-spectrum pseudo code detection method based on frequency domain amplitude processing |
| CN102724125A (en) * | 2012-06-28 | 2012-10-10 | 黑龙江大学 | On-chip network node communication method based on macro virtual channel |
| CN102801626A (en) * | 2012-08-17 | 2012-11-28 | 北京空间飞行器总体设计部 | Satellite-borne data management method and device based on AOS standard |
| CN102833132A (en) * | 2012-08-30 | 2012-12-19 | 西安空间无线电技术研究所 | Detection method of onboard data multiplexer |
| US20130021932A1 (en) * | 2011-07-19 | 2013-01-24 | Qualcomm Incorporated | Sleep mode for user equipment relays |
| CN104283639A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Troubleshooting system and method of data transmission sub system based on two stages of check codes |
| CN104423269A (en) * | 2013-08-29 | 2015-03-18 | 精工爱普生株式会社 | Electronic Timepiece |
| CN105515638A (en) * | 2015-11-30 | 2016-04-20 | 上海卫星工程研究所 | Satellite-borne multi-load data frame transmission device and method |
| CN105610548A (en) * | 2015-12-28 | 2016-05-25 | 北京卫星制造厂 | Telemetering framing and downloading method based on event-driven |
| CN105739416A (en) * | 2016-05-06 | 2016-07-06 | 上海航天测控通信研究所 | Satellite-borne comprehensive electronic computer |
| CN105894773A (en) * | 2016-04-20 | 2016-08-24 | 上海微小卫星工程中心 | Method and system for satellite telemetry speed increasing and load data fusion |
| CN106502934A (en) * | 2016-11-09 | 2017-03-15 | 上海微小卫星工程中心 | The spaceborne data management system of high-speed integratedization |
| CN107566106A (en) * | 2017-08-31 | 2018-01-09 | 沈阳理工大学 | A kind of AOS distributed communication analogue systems based on HLA RTI |
| CN107679152A (en) * | 2017-09-26 | 2018-02-09 | 中国科学院电子学研究所 | Data processing method based on multi-layer information joint index |
-
2018
- 2018-06-28 CN CN201810683969.1A patent/CN109039423A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002223186A (en) * | 2001-01-25 | 2002-08-09 | Mitsubishi Electric Corp | Satellite observation system |
| CN101527584A (en) * | 2009-03-16 | 2009-09-09 | 哈尔滨工程大学 | Spread-spectrum pseudo code detection method based on frequency domain amplitude processing |
| US20130021932A1 (en) * | 2011-07-19 | 2013-01-24 | Qualcomm Incorporated | Sleep mode for user equipment relays |
| CN102724125A (en) * | 2012-06-28 | 2012-10-10 | 黑龙江大学 | On-chip network node communication method based on macro virtual channel |
| CN102801626A (en) * | 2012-08-17 | 2012-11-28 | 北京空间飞行器总体设计部 | Satellite-borne data management method and device based on AOS standard |
| CN102833132A (en) * | 2012-08-30 | 2012-12-19 | 西安空间无线电技术研究所 | Detection method of onboard data multiplexer |
| CN104423269A (en) * | 2013-08-29 | 2015-03-18 | 精工爱普生株式会社 | Electronic Timepiece |
| CN104283639A (en) * | 2014-09-16 | 2015-01-14 | 上海卫星工程研究所 | Troubleshooting system and method of data transmission sub system based on two stages of check codes |
| CN105515638A (en) * | 2015-11-30 | 2016-04-20 | 上海卫星工程研究所 | Satellite-borne multi-load data frame transmission device and method |
| CN105610548A (en) * | 2015-12-28 | 2016-05-25 | 北京卫星制造厂 | Telemetering framing and downloading method based on event-driven |
| CN105894773A (en) * | 2016-04-20 | 2016-08-24 | 上海微小卫星工程中心 | Method and system for satellite telemetry speed increasing and load data fusion |
| CN105739416A (en) * | 2016-05-06 | 2016-07-06 | 上海航天测控通信研究所 | Satellite-borne comprehensive electronic computer |
| CN106502934A (en) * | 2016-11-09 | 2017-03-15 | 上海微小卫星工程中心 | The spaceborne data management system of high-speed integratedization |
| CN107566106A (en) * | 2017-08-31 | 2018-01-09 | 沈阳理工大学 | A kind of AOS distributed communication analogue systems based on HLA RTI |
| CN107679152A (en) * | 2017-09-26 | 2018-02-09 | 中国科学院电子学研究所 | Data processing method based on multi-layer information joint index |
Non-Patent Citations (1)
| Title |
|---|
| 中国宇航学会先进小卫星技术与应用专业委员会: "高速光纤网络在卫星中的应用方法", 《中国现代小卫星技术发展研究论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838886A (en) * | 2020-12-22 | 2021-05-25 | 浙江吉利控股集团有限公司 | Data processing method, device and equipment for small satellite and storage medium |
| CN112968750A (en) * | 2021-01-11 | 2021-06-15 | 西安交通大学 | Satellite image compressed data block analysis method and system based on AOS frame |
| CN112968750B (en) * | 2021-01-11 | 2022-07-12 | 西安交通大学 | Satellite image compressed data block analysis method and system based on AOS frame |
| CN116846515A (en) * | 2023-07-07 | 2023-10-03 | 中国科学院空天信息创新研究院 | AOS frame effective data extraction method, device, equipment and medium |
| CN116846515B (en) * | 2023-07-07 | 2024-02-06 | 中国科学院空天信息创新研究院 | AOS frame effective data extraction method, device, equipment and medium |
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