CN110138416A - The spaceborne wired multi-channel detection probabilistic testing method of AIS ship oceangoing ship - Google Patents
The spaceborne wired multi-channel detection probabilistic testing method of AIS ship oceangoing ship Download PDFInfo
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- CN110138416A CN110138416A CN201910290369.3A CN201910290369A CN110138416A CN 110138416 A CN110138416 A CN 110138416A CN 201910290369 A CN201910290369 A CN 201910290369A CN 110138416 A CN110138416 A CN 110138416A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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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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Abstract
The present invention relates to a kind of wired multi-channel detection probabilistic testing methods of spaceborne AIS ship oceangoing ship in satellite test method and technology field, include the following steps: step 1, setting test connection status；Step 2, number is arranged by integrated electronics on star to spread machine, and sends number biography and forbids receiving AIS data command；Step 3, ais signal simulation source and the booting of AIS ground signal processing device are set, ais signal simulation source is set；Step 4, AIS recipient processor receives the multi-channel radio frequency ais signal of simulation source transmitting, and is pre-processed；Step 5, AIS ground signal processing device logarithm passes the received AIS data of ground-based server and carries out the processing such as time slot collision and demodulation, by the way that solve No. MMSI to be compared with send No. MMSI, and then obtains ship detecting probability.It the invention proposes the wired detection probability test method of AIS under whole starlike state, solves the problems, such as that ground test place is limited, accelerates satellite development progress, versatility with higher.
Description
Technical field
The present invention relates to satellite test method and technology fields, examine more particularly to a kind of spaceborne wired multichannel of AIS ship oceangoing ship
Survey probabilistic testing method.
Background technique
Spaceborne AIS system (ship automatic identification system) is a kind of novel digital navaid, mainly uses self-organizing
Time division multiple acess SOTDMA mode realizes the functions such as channel access and equipment intercommunication.The system is by ship longitude and latitude, name of vessel
Etc. sound state Information encapsulation at specific text, in ship from VHF VHF channel to Its Adjacent Waters and base station base station broadcast,
To realize being mutually distinguishable for ship, navigation safety is ensured.Development with sea transport industry and the need to sea area security monitoring
It asks, the advantage that spaceborne AIS system (ship automatic identification system) is covered on a large scale with it, the weight increasingly studied both at home and abroad
Depending on.Since the coverage area of satellite AIS detection is larger, AIS antenna can be received simultaneously between different VHF communication cell units
AIS information, the problem of easily causing AIS information collision in the case where intensive for ship, increase decoding difficulty.
The invention proposes the wired detection probability test methods of AIS under whole starlike state, define the phase of number biography and AIS load
Instruction sequencing relationship is closed, the offset of AIS data start of frame bits is avoided and (when AIS recipient processor power on operation, is not provided with number and passes taboo
AIS data command is only received, the data processor that the perturbation pulse signal of interface circuit can be had been switched on can regard normal data
It receives, causes AIS data start of frame bits to deviate, not can be carried out subsequent AIS data processing).In addition, AIS ship oceangoing ship radio detection
There are multipath effects etc. to influence for probabilistic testing, needs to be tested in screened room, surveys to meet wireless ship detecting probability
Environmental requirement is tried, satellite needs replacing test site and re-establishes whole star test mode, which needs many satellite operations, right
Development progress and cost bring larger impact.The present invention is reduced using wired detection probability test method and is tested satellite ground
The requirement in place accelerates satellite development progress.Present invention versatility with higher, can be applied to the star with AIS load
Carry the test of AIS ship oceangoing ship detection probability.
The invention proposes numbers on star to pass the dependent instruction sequential relationship with AIS load, avoids AIS data start of frame bits
Offset, while reducing the requirement of satellite ground test site.
Summary of the invention
The purpose of the present invention is to provide a kind of spaceborne wired multi-channel detection probabilistic testing methods of AIS ship oceangoing ship.The present invention
Method propose the wired detection probability test method of AIS under whole starlike state, solve the problems, such as that ground test place is limited, adds
Fast satellite development progress, present invention versatility with higher can be applied to have the spaceborne AIS ship oceangoing ship of AIS load to detect
Probabilistic testing.
The present invention is realized by following technical solution, and the present invention relates to a kind of spaceborne wired multichannels of AIS ship oceangoing ship
Detection probability test method, comprising the following steps:
Step 1, setting test connection status, ais signal simulation source pass through the more receiving areas terrestrial high-frequency cable connection AIS
Reason machine, for simulating the radiofrequency signal feature of spaceborne AIS antenna port；AIS recipient processor is passed by LVDS cable connection number
Subsystem, AIS recipient processor connect overall circuit and integrated electronics subsystem by low-frequency cable；AIS ground signal processing
Device connection number passes ground-based server；
Step 2, number is arranged by integrated electronics on star to spread machine, and sends number biography and forbids receiving AIS data command；Pass through
Integrated electronics send instruction so that overall circuit executes the operation of AIS recipient processor booting, and the receiving area AIS is arranged on star
Reason machine works in write state；It is switched on after five minutes in AIS recipient processor, integrated electronics, which send number biography, allows reception AIS data to refer to
It enables；
Step 3, ais signal simulation source and the booting of AIS ground signal processing device are set, ais signal simulation source is set；
Step 4, AIS recipient processor receives the multi-channel radio frequency ais signal of simulation source transmitting, and is pre-processed and (adopted
Sample, quantization, added-time mark, storage, transmission)；On star integrated electronics realize to AIS recipient processor send string note instruction, receive it is distant
Parameter relevant operation is surveyed, overall circuit provides switching on and shutting down for AIS recipient processor and adds power operation, and number, which passes, receives the receiving area AIS
The AIS data that reason machine is sent；
Step 5, AIS ground signal processing device logarithm passes the received AIS data of ground-based server and carries out time slot collision and solution
Adjust etc. processing, by by solve No. MMSI and send No. MMSI be compared, and then obtain ship detecting probability.
Preferably, in step 3, the setting ais signal simulation source includes the following steps:
(1) ais signal of 500-5000 ship target is generated, ais signal format meets ITU-R M.1371-5 technology
Code requirement, and the ship regularity of distribution is arranged according to practical application scene；
(2) multiple target ais signal is arranged according to the relative positional relationship of satellite orbital altitude, ship and satellite and emits frequency
Point, frequency deviation, power, time delay relevant parameter；
(3) lasting simulation generates the multiple target ais signal of at least 300s.
The present invention have it is following the utility model has the advantages that
1, the invention proposes the wired detection probability test methods of AIS under whole starlike state, define number and pass and AIS load
Dependent instruction sequential relationship avoids the offset of AIS data start of frame bits and (when AIS recipient processor power on operation, is not provided with several biographies
Forbid receiving AIS data command, the data processor that the perturbation pulse signal of interface circuit can be had been switched on can regard normal number
According to reception, cause AIS data start of frame bits to deviate, not can be carried out subsequent AIS data processing)；
2, there are multipath effects etc. to influence for AIS ship oceangoing ship radio detection probabilistic testing, needs to be tested in screened room, is
The wireless ship detecting probabilistic testing environmental requirement of satisfaction, satellite need replacing test site and re-establish whole star test mode,
The process needs many satellite operations, brings larger impact to development progress and cost.The present invention is surveyed using wired detection probability
Method for testing reduces the requirement to satellite ground test site, accelerates satellite development progress.
3, present invention versatility with higher can be applied to the spaceborne AIS ship oceangoing ship detection probability test of AIS load.
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 test macro block diagram of the invention.
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, several changes and improvements can also be made.These belong to the present invention
Protection scope.
Embodiment
In the present embodiment, the spaceborne wired multi-channel detection probabilistic testing method of AIS ship oceangoing ship of the present invention, including it is following
Step: step 1, setting test connection status；Step 2, number is arranged by integrated electronics on star to spread machine, and sends number biography and forbids
Receive AIS data command；Instruction is sent by integrated electronics on star so that overall circuit executes the behaviour of AIS recipient processor booting
Make, and the work of AIS recipient processor is set in write state；It is switched on after five minutes in AIS recipient processor, integrated electronics are sent
Number, which passes, to be allowed to receive AIS data command；Step 3, ais signal simulation source and the booting of AIS ground signal processing device, setting are set
Ais signal simulation source；Step 4, AIS recipient processor receives the multi-channel radio frequency ais signal of simulation source transmitting, and is located in advance
Reason (sampling, quantization, added-time mark, storage, transmission)；Integrated electronics, which are realized, on star sends the instruction of string note to AIS recipient processor, connects
Telemetry parameter relevant operation is received, overall circuit provides switching on and shutting down for AIS recipient processor and adds power operation, and number passes reception AIS and connects
Receive the AIS data that processor is sent；Step 5, AIS ground signal processing device logarithm passes the received AIS data of ground-based server
Carry out time slot collision and demodulation etc. processing, by by solve No. MMSI and send No. MMSI be compared, and then obtain ship
Oceangoing ship detection probability.
Present pre-ferred embodiments are provided with reference to the accompanying drawing, in order to explain the technical scheme of the invention in detail.
As shown in Figure 1, the spaceborne wired multi-channel detection probabilistic testing method of AIS ship oceangoing ship of the present invention, comprising the following steps:
Step 1, setting test connection status, ais signal simulation source are received by two terrestrial high-frequency cable connection AIS
Processor, for simulating the radiofrequency signal feature of spaceborne AIS antenna port；AIS recipient processor passes through LVDS cable connection number
Subsystem is passed, AIS recipient processor connects overall circuit, integrated electronics subsystem by low-frequency cable；AIS ground signal processing
Device connection number passes ground-based server；
Step 2 is arranged number by integrated electronics on star and spreads machine, and sends number biography and forbid receiving AIS data command；It is logical
It crosses integrated electronics on star and sends instruction so that overall circuit executes the operation of AIS recipient processor booting, and AIS reception is arranged
Processor operation is in write state；It is switched on after five minutes in AIS recipient processor, integrated electronics, which send number biography, to be allowed to receive AIS data
Instruction；
Step 3 is arranged ais signal simulation source and the booting of AIS ground signal processing device, ais signal simulation source is arranged:
The ais signal of 2500 ship targets is generated, ais signal format meets ITU-R, and M.1371-5 technical specification is wanted
It asks, AIS message content is as shown in table 1；
Setting ship, which is distributed to obey, is uniformly distributed rule；
According to the relative positional relationship of satellite orbital altitude 600km, ship and satellite, the frequency of multiple target ais signal is set
- 4-4KHz partially, difference power 0-12dB, time delay 0-8ms；
Multiple target ais signal launching frequency 162.025MHz is set；
The multiple target ais signal that lasting simulation generates 360s is set.
Table 1, AIS message content
Step 4, AIS recipient processor receive two channel AIS radiofrequency signals of simulation source transmitting, sample through filtering, AD
Deng, completion signal digitlization, then signal is sent into FPGA processing, final process is baseband digital signal, and is output this to solid
State memory.Time tag is added by the complete paired data of solid-state memory, is transmitted to data transmission subsystem after formatting；It is comprehensive on star
Electrically realized that AIS recipient processor is given to send the operations such as the instruction of string note, reception telemetry parameter, overall circuit is AIS reception processing
Machine provides switching on and shutting down and adds power operation；
Step 5 is sent string note instruction setting AIS recipient processor and is write and stopped, retransmits reading instruction, work by integrated electronics
Make in read states, spaceborne AIS data read in data transmission subsystem, and pass ground-based server by number and be transferred at AIS ground signal
Manage device；AIS ground signal processing device carries out solution time slot collision and demodulation process, ais signal processing to two channel ais signal data
Software has the ability of solution two, triple time slot collisions；Symbol after demodulation is converted to effective information (such as No. MMSI, the warp of ship
Latitude etc.) storage arrive specified file, by by solve No. MMSI and send No. MMSI be compared obtain ship detecting it is general
Rate.
In conclusion the invention proposes the wired detection probability test method of AIS under whole starlike state, define number pass and
The dependent instruction sequential relationship of AIS load, avoid AIS data start of frame bits offset (when AIS recipient processor power on operation,
Number biography is not provided with to forbid receiving AIS data command, the data processor meeting that the perturbation pulse signal of interface circuit can be had been switched on
As normal data reception, cause AIS data start of frame bits to deviate, not can be carried out subsequent AIS data processing)；AIS ship oceangoing ship without
There are multipath effects etc. to influence for the test of line detection probability, needs to be tested in screened room, in order to meet wireless ship detecting
Probabilistic testing environmental requirement, satellite need replacing test site and re-establish whole star test mode, which needs many satellites
Operation, brings larger impact to development progress and cost.The present invention is reduced using wired detection probability test method to satellite
The requirement in ground test place accelerates satellite development progress.Present invention versatility with higher, can be applied to AIS load
The spaceborne AIS ship oceangoing ship detection probability of lotus is tested.
Particular embodiments described above, the technical issues of to solution of the invention, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (2)
1. a kind of wired multi-channel detection probabilistic testing method of spaceborne AIS ship oceangoing ship, which comprises the following steps:
Step 1, setting test connection status, ais signal simulation source are handled by more terrestrial high-frequency cable connection AIS receptions
Machine, for simulating the radiofrequency signal feature of spaceborne AIS antenna port；AIS recipient processor is passed by LVDS cable connection number to be divided
System, AIS recipient processor connect overall circuit and integrated electronics subsystem by low-frequency cable；AIS ground signal processing device
Connection number passes ground-based server；
Step 2, number is arranged by integrated electronics on star to spread machine, and sends number biography and forbids receiving AIS data command；By on star
Integrated electronics send instruction so that overall circuit executes the operation of AIS recipient processor booting, and AIS recipient processor is arranged
Work is in write state；It is switched on after five minutes in AIS recipient processor, integrated electronics, which send number biography, to be allowed to receive AIS data command；
Step 3, ais signal simulation source and the booting of AIS ground signal processing device are set, ais signal simulation source is set；
Step 4, AIS recipient processor receives the multi-channel radio frequency ais signal of simulation source transmitting, and is pre-processed；It is comprehensive on star
It closes electrically realized infuse to AIS recipient processor transmission string instruct, receive telemetry parameter relevant operation, overall circuit is that AIS is received
Processor provides switching on and shutting down and adds power operation, and number, which passes, receives the AIS data that AIS recipient processor is sent；
Step 5, AIS ground signal processing device logarithm passes the received AIS data progress time slot collision of ground-based server and solution is mediated
Reason, by by solve No. MMSI and send No. MMSI be compared, and then obtain ship detecting probability.
2. the spaceborne wired multi-channel detection probabilistic testing method of AIS ship oceangoing ship as described in claim 1, characterized in that step 3
In, the setting ais signal simulation source includes the following steps:
(1) ais signal of 500-5000 ship target is generated, ais signal format meets ITU-R M.1371-5 technical specification
It is required that and the ship regularity of distribution is arranged according to practical application scene；
(2) multiple target ais signal launching frequency, frequency are arranged according to the relative positional relationship of satellite orbital altitude, ship and satellite
Partially, power, time delay relevant parameter；
(3) lasting simulation generates the multiple target ais signal of at least 300s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111416672A (en) * | 2020-03-10 | 2020-07-14 | 深圳市海能达通信有限公司 | AIS equipment test system, method and computer readable storage medium |
| CN111490838A (en) * | 2020-04-20 | 2020-08-04 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Ship-based satellite communication quality detection system and method |
| CN114499637A (en) * | 2021-12-28 | 2022-05-13 | 中国科学院空天信息创新研究院 | Method and system for implementing data transmission satellite-ground butt joint between ground receiving station and satellite |
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