CN105721042A - Satellite communication system applicable to small ships - Google Patents
Satellite communication system applicable to small ships Download PDFInfo
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- CN105721042A CN105721042A CN201610117486.6A CN201610117486A CN105721042A CN 105721042 A CN105721042 A CN 105721042A CN 201610117486 A CN201610117486 A CN 201610117486A CN 105721042 A CN105721042 A CN 105721042A
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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
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
- H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The present invention provides a satellite communication system applicable to small ships. The satellite communication system comprises: a shipborne antenna, a servo control unit, a radio frequency unit, and a satellite router unit. The radio frequency unit is connected to the shipborne antenna by a low-loss radio frequency feeder cable. The shipborne antenna is used to receive and transmit L-band communication signals of geostationary earth orbit (GEO) communication satellites and slightly inclined geostationary orbit (SIGSO) communication satellites. The servo control unit is used to adjust an azimuth, a pitch angle, and a polarization angle of the antenna, to enable the antenna to track a geostationary satellite while the orientation of the ship is changing. The radio frequency unit is used to perform frequency conversion and signal amplification on a to-be-transmitted radio frequency signal. The satellite router unit is used to modulate the radio frequency signal. The existing GEO and IGSO satellite systems are used to achieve the objective of using satellite mobile packet data to perform communication. Compared with the prior art, the satellite communication system provided by the present invention effectively solves the problems such as there are many communication device systems; the functions are simple; the device compatibility is poor; and the information resource sharing is poor.
Description
Technical field
The invention belongs to technical field of satellite communication, especially relate to a kind of satellite communication system suitable in spitkit.
Background technology
Spitkit communication is mainly with inshore short wave communication equipment, above-mentioned communication belongs to bank base communication, it is subject to frequency resource and distance limit, during away from coastline, cannot liaison normally, the sharing and the compatibility that cause Service Source are poor, allomeric function can not be effectively played, difficult management.Meanwhile, short wave communication major part adopts mode of frequency regulation, disturbs more, and distress alerting scope and reliability are not high.
In addition, from management view, restriction due to communication capacity, the management of spitkit ship, coordination and communication are lacked effective regulatory measure and measure by local fish-farming operation fishing prison and maritime sector, non-fishing operation, illegal fishing and the spitkit occurred especially for spitkit crosses the border the problem fished for, it is impossible to carry out investigating and collecting evidence and effectively supervision.
Summary of the invention
Embodiments provide a kind of satellite communication system suitable in spitkit, to solve above-mentioned Problems existing.
Embodiments provide the satellite communication system suitable in spitkit, described system includes:
Ship-board antenna, servo control unit, radio frequency unit and satellite router unit, described radio frequency unit is connected by low loss RF feeder line with ship-board antenna；
Wherein, described ship-board antenna is used for receiving and dispatching geostationary orbit telecommunication satellite (GEO) or small inclination geostationary orbit telecommunication satellite (SIGSO) satellite L-band signal of communication；
Described servo control unit is used for adjusting antenna azimuth, the angle of pitch and polarizing angle, is used for making hull antenna real-time tracking geostationary satellite in change procedure；
Radio frequency unit, carries out frequency conversion and signal processing and amplifying for sending out radiofrequency signal；
Described satellite router unit, for modulated radio signal.
Further, described ship-board antenna is 0.9m parabola antenna, and described parabola antenna is duplexer, and described ship-board antenna includes: orthogonal coupling feed OMT, for the signal of communication being coupled to receive.
Further, described servo control unit includes: antenna driver and antenna servo controller.
Further, described radio frequency unit includes: power splitter, outdoor version LNB LNA+low-converter and BUC power amplifier and upconverter.
Described power splitter is used for separating signal of communication and TV signal.
Further, described satellite router unit includes:
Modulator block and demodulator module composition, described satellite router adopts DVB-S2 communication mechanism.
Further, described modulator block includes:
Adaptive Modulation module, forward error correction block, interweaving encoding module, physical layer framing module and orthogonal modulation module；
Described Adaptive Modulation module is used for receiving input signal, the inlet flow form that adaptive DVB-S2 standard is different；
Forward error correction block is for baseband signal forward error correction；
Interweaving encoding module is for being interleaved ISN signal and outer code signal；
Physical layer framing module is for carrying out physical frame framing processing to signal；
Orthogonal modulation module for carrying out orthogonal modulation to frame signal, and sends to radio frequency unit.
Further, described system also includes: satellite phone unit, and described satellite phone unit is for calling by satellite；
Described satellite phone unit includes: voice gateways and telephone set, and institute's voice gateway is connected to satellite router unit network interface.
Further, described system also includes: television receiver unit, and described television receiver unit is for generating TV signal according to intermediate frequency letter.
Further, described system also includes: response unit of propagandaing directed to communicate, for carrying out two-way call with land bank.
The satellite communication system being applicable to spitkit that the embodiment of the present invention provides, it is possible to make full use of existing GEO and IGSO satellite system, it is achieved moved the purpose of message data communication by GEO and IGSO satellite.Compared with prior art, efficiently solve communication equipment system numerous, function singleness, equipment compatibility difference and information resources share difference etc. problem.Facilitate the supervision of spitkit.And can provide, for spitkit, the function more enriched.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the satellite communication system being applicable to spitkit that the embodiment of the present invention provides；
Fig. 2 is the structural representation of radio frequency unit suitable in the satellite communication system of spitkit that the embodiment of the present invention provides；
Fig. 3 is the structural representation of the response unit of propagandaing directed to communicate suitable in the satellite communication system of spitkit that the embodiment of the present invention provides；
Fig. 4 is the handling process schematic diagram of the satellite communication system Satellite router unit being applicable to spitkit that inventive embodiments of the present invention provides；
Fig. 5 is the handling process schematic diagram of television receiver unit suitable in the satellite communication system of spitkit that inventive embodiments of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Fig. 1 is the satellite communication system being applicable to spitkit that the embodiment of the present invention provides, as seen from Figure 1, satellite communication system suitable in spitkit includes: ship-board antenna, servo control unit, radio frequency unit and satellite router unit, described radio frequency unit is connected by low loss RF feeder line with ship-board antenna；Wherein, described ship-board antenna is used for receiving and dispatching geostationary orbit telecommunication satellite (GEO) or small inclination geostationary orbit telecommunication satellite (SIGSO) satellite L-band signal of communication；Described servo control unit is used for adjusting antenna azimuth, the angle of pitch and polarizing angle, is used for making hull antenna real-time tracking geostationary satellite in change procedure；Radio frequency unit, carries out frequency conversion and signal processing and amplifying for sending out radiofrequency signal；Described satellite router unit, for modulated radio signal.Satellite adopts Ku wave band, geostationary orbit telecommunication satellite (GEO) or small inclination geostationary orbit telecommunication satellite (SIGSO).Communicator includes ship-board antenna and accepts and send signal of communication.Existing geostationary orbit telecommunication satellite (GEO) or small inclination geostationary orbit telecommunication satellite (SIGSO) can be utilized, effectively reduce communication cost.Ship-board antenna adopts 0.9m parabola antenna, it is possible to reduce the adjustment to antenna, improves the efficiency of transmitting-receiving signal of communication.Described ship-board antenna also includes: orthogonal coupling feed OMT, for the signal of communication being coupled to receive.Receive signal to couple through OMT.
Described servo control unit includes: antenna driver and antenna servo controller.The angle of antenna can be adjusted, it is possible to strengthen the signal intensity received according to signal intensity.
Described radio frequency unit includes: power splitter, outdoor version LNB LNA+low-converter and BUC power amplifier and upconverter.Described power splitter is used for separating signal of communication and TV signal.Radio frequency unit forms by adopting outdoor version LNB (LNA+low-converter) and BUC (power amplifier+upconverter).BUC adopts 3W power amplifier.Radio frequency unit signal end couples feed with ship-board antenna OMT and is connected.
Described satellite router unit includes: modulator block and demodulator module composition, described satellite router adopts DVB-S2 communication mechanism.
Adaptive Modulation module described in modulator block is used for receiving input signal, the inlet flow form that adaptive DVB-S2 standard is different；Forward error correction block is for baseband signal forward error correction；Interweaving encoding module is for being interleaved ISN signal and outer code signal；Physical layer framing module is for carrying out physical frame framing processing to signal；Orthogonal modulation module for carrying out orthogonal modulation to frame signal, and sends to radio frequency unit.Adaptive Modulation module receives input signal, is used for the inlet flow form that adaptive DVB-S2 standard is different, and stream adaptation completes base band framing, two functions of scrambling.Baseband signal forward error correction adopts the form of LDPC (low density parity check code) (ISN) and BCH code (outer code) cascade.At interleaved coding, signal is carrying out physical frame framing processing.After the baseband signal of last framing carries out orthogonal modulation, radio frequency unit is arrived in output.Demodulator module receiving terminal receives the intermediate-freuqncy signal of the medium frequency output end of radio frequency unit, first signal is carried out quadrature demodulation, utilizes Carrier Synchronization to reach the demodulation performance of excellence.Then being deinterleaved, decoding FEC, solution frame process, and recover base-band data stream output.For the demodulation effect obtained, the supplementary modules such as other is as removed direct current, orthogonal balanced, descrambling are also indispensable.
In the preferred implementation of the present embodiment, in order to realize call function, described system also includes: communication unit, including: PC, reception multicast information management software and display.Receive information management software and pushed mode, automatic reception and Dynamic Announce issue meteorology and Fisheries Information by IP multicast information.These information are pushed issue by the data base on the information processing platform backstage of control centre.Reception information first by ship-board antenna and servo control unit from motion tracking telecommunication satellite, radiofrequency signal, amplified and frequency-conversion processing is received to L-band through radio frequency unit, demodulating process data then through satellite router unit base-band information process, it is connected to communication interface display unit by netting twine, through local reception broadcast message management software, the pushed information that real-time reception is above-mentioned.Simultaneously by merchant ship broadcast system, convert voice broadcast service to.Receiving multicast information management software major function is the boat-carrying communicator duty showing the six directions one communication function of the present invention, as signal enters lock status, receives frequency, signal level, Eb/No, the bit error rate etc..Thering is provided authorised channel list ,/closing passage can be opened in this locality.Monitor in real time the reception condition of each file broadcast passage, including the reception time, receive file number, gross information content, filename that real-time display is receiving and speed etc..Monitor the reception condition of multimedia broadcasting passage in real time, including filename, the date and time starting and terminating, occupied bandwidth etc..The file type of browsable inquire-receive, filename, priority, file size, state.The duty (as signal enters lock status, Eb/No etc.) of device (may specify) at timed intervals to be charged in LOG file.
Described system also includes: satellite phone unit, and described satellite phone unit is for calling by satellite；Described satellite phone unit includes: voice gateways and telephone set, and institute's voice gateway is connected to satellite router unit network interface.The voice gateways utilizing the present invention connect plain old telephone, enter the fixing of public network and mobile service system, and two-way telephone is conversed.The functions such as support call keeps, calling transfer, Call Waiting, and switching group of conversing answers, note, urgent call, automatic-answering back device.
In order to enrich the function of native system further, described system also includes: television receiver unit, and described television receiver unit is for generating TV signal according to intermediate frequency letter.Utilize antenna and the servo control unit of the present invention, receive as TV receiving signal front end signal.The reception TV signal of antenna and servo control unit employing and the orthogonal coupling feed of Signal & Communication Integration design, can obtain higher Signal segregation degree, and antinoise signal interference is strong.Television receiver unit includes: satellite signal decoders and radiotelevisor.Satellite-signal demodulator is connected to the unit of the satellite router of boats and ships satellite communication apparatus.Under working environment, search automatically, identification, tracking satellite signal, the TV programme signal of real-time reception geosynchronous satellite, and alignment presets satellite in high precision, it is ensured that TV receiving signal is free of discontinuities continuously.With reference to Fig. 5, satellite television decoder is mainly made up of processing modules such as TV signal demodulation, channel-decoding and television signal decoders.Satellite television decoder can receive single-definition digital television signal and the digital broadcast signal of direct satellite direct broadcast system transmission, can receive the information service of direct satellite direct broadcast system transmission.
Utilize native system also can realize the corresponding function utilizing satellite communication to access the Internet, utilize the satellite router unit of the present invention, browser service on net is provided, adopt asymmetrical high speed satellite transmission technology, optimize the network bandwidth and support standard ICP/IP protocol, WWW, E-mail, Newsgroup, Telnet agreement.Support One-to-All Broadcast streaming is looked, the real-time multipoint reception of audio frequency.
Described system also includes: response unit of propagandaing directed to communicate, for carrying out two-way call with land bank.Propaganda directed to communicate response unit, including: IP Camera, high sensitivity pick up, network talkback machine, network hard disk video recorder, stand-by power supply and alarm.Network hard disk video recorder has video and audio interface, connects IP Camera, high sensitivity pick up, transmitter receiver.Network hard disk video recorder also has network interface, is connected with the Baseband input of satellite router unit, is transmitted the video and voice data that gather by satellite network, it is possible to the video of storage this locality collection and voice data.Transmitter receiver connects network hard disk video recorder audio input end, and data process through satellite router unit through network hard disk video recorder, it is achieved network bi-directional intercommunication function.When command centre propagandas directed to communicate, boats and ships need to be responded immediately, and this is that spitkit needs the possessed function of solar obligation equipment.Spitkit must be responded the calling of law enforcement public affair ship and propaganda directed to communicate.
Propaganda directed to communicate and can utilize the transmitter receiver of the present invention, with the enlarging function that amplifies, broadcast & call in cabin, if fisherman's response.Recording or video recording equipment do not start.If boats and ships are not replied, start sound pick-up outfit, first the duty of spitkit is gathered with high sensor (pick up), spitkit cabin personnel activity's situation, by sound pick-up outfit record, and can remotely control sound pick-up outfit, record and transmission recording data by satellite transmission channel, in order to investigate and collect evidence.
Its idiographic flow is as follows:
(1) utilize intercom function, public affair ship or control center call called spitkit；
(2) if there being people to answer, normal talking；
(3) if ring unanswered, automatically start public address equipment on ship and aboard ship call；
(4) if again without call answering, command centre send instruction and enter recording state；
(5) first record call contents of propagandaing directed to communicate, utilize the on-the-spot sound of the highly sensitive situ microphone of sound pick-up outfit, record and reduction simultaneously；
(6) terminate recording, according to teleinstruction, carry out locally stored and recording data passback.
(7) if power-off, can sound and light alarm.
Further, propagandaing directed to communicate the network hard disk video recorder of response unit can built-in GPS/ Beidou satellite navigation locating module, it is possible to the location longitude and latitude of fishing boat, course over ground, the speed of a ship or plane and total voyage.Can carry out flight-line design, track recording, voyage statistics, multi-functional, alarming, drag of anchor supervision, deck log management etc..The location information of boats and ships passes through the real-time back information center of this device, shows the information such as the position of boats and ships, air route and duty in the information during excess of the heart.Electronic Chart Display with control function, can show the whole world sea chart, map sheet automatically select and seamless spliced arbitrarily enlarged/reduce/roam；Memory picture and rollback；Layering selectivity shows；Ambient brightness adaptability shows；On north orientation/first to upwards showing；True motion/relative motion shows.Chart data includes: the data such as various navigation marks, transponder, reef, foul water, shipwreck, isobath, place name.
The present embodiment is the satellite communication system being applicable to spitkit that inventive embodiments provides, it is possible to make full use of existing GEO and IGSO satellite system, it is achieved moved the purpose of message data communication by GEO and IGSO satellite.Compared with prior art, efficiently solve communication equipment system numerous, function singleness, equipment compatibility difference and information resources share difference etc. problem.Facilitate the supervision of spitkit.Solve spitkit communication equipment system numerous, function singleness, equipment compatibility difference and information resources share difference etc. problem.
Additionally, the equipment of the present invention can carry out remotely controlling to carry out parameter configuration, it is achieved the dynamic distribution of satellite frequency resource, it is achieved the changing frequency and change star function of remote station.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, and the specific works process of the system of foregoing description, device and unit, it is possible to reference to the corresponding process in preceding method embodiment, do not repeat them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, it is possible to realize by another way.Device embodiment described above is merely schematic, such as, the division of described unit, it is only a kind of logic function to divide, actual can have other dividing mode when realizing, again such as, multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some communication interfaces, device or unit, it is possible to be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (9)
1. the satellite communication system being applicable to spitkit, it is characterised in that described system includes:
Ship-board antenna, servo control unit, radio frequency unit and satellite router unit, described radio frequency unit is connected by low loss RF feeder line with ship-board antenna；
Wherein, described ship-board antenna is used for receiving and dispatching geostationary orbit telecommunication satellite (GEO) or small inclination geostationary orbit telecommunication satellite (SIGSO) satellite L-band signal of communication；
Described servo control unit is used for adjusting antenna azimuth, the angle of pitch and polarizing angle, is used for making hull antenna real-time tracking geostationary satellite in change procedure；
Radio frequency unit, carries out frequency conversion and signal processing and amplifying for sending out radiofrequency signal；
Described satellite router unit, for modulated radio signal.
2. system according to claim 1, it is characterised in that described ship-board antenna is 0.9m parabola antenna, described parabola antenna is duplexer, and described ship-board antenna includes: orthogonal coupling feed OMT, for the signal of communication being coupled to receive.
3. system according to claim 1, it is characterised in that described servo control unit includes: antenna driver and antenna servo controller.
4. system according to claim 1, described radio frequency unit includes: power splitter, outdoor version LNB LNA+low-converter and BUC power amplifier and upconverter.
Described power splitter is used for separating signal of communication and TV signal.
5. system according to claim 1, it is characterised in that described satellite router unit includes:
Modulator block and demodulator module composition, described satellite router adopts DVB-S2 communication mechanism.
6. system according to claim 5, it is characterised in that described modulator block includes:
Adaptive Modulation module, forward error correction block, interweaving encoding module, physical layer framing module and orthogonal modulation module；
Described Adaptive Modulation module is used for receiving input signal, the inlet flow form that adaptive DVB-S2 standard is different；
Forward error correction block is for baseband signal forward error correction；
Interweaving encoding module is for being interleaved ISN signal and outer code signal；
Physical layer framing module is for carrying out physical frame framing processing to signal；
Orthogonal modulation module for carrying out orthogonal modulation to frame signal, and sends to radio frequency unit.
7. system according to claim 1, it is characterised in that described system also includes: satellite phone unit, described satellite phone unit is for calling by satellite；
Described satellite phone unit includes: voice gateways and telephone set, and institute's voice gateway is connected to satellite router unit network interface.
8. system according to claim 1, it is characterised in that described system also includes: television receiver unit, described television receiver unit is for generating TV signal according to intermediate frequency letter.
9. system according to claim 1, it is characterised in that described system also includes: response unit of propagandaing directed to communicate, for carrying out two-way call with land bank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610117486.6A CN105721042A (en) | 2016-03-02 | 2016-03-02 | Satellite communication system applicable to small ships |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610117486.6A CN105721042A (en) | 2016-03-02 | 2016-03-02 | Satellite communication system applicable to small ships |
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| CN201610117486.6A Pending CN105721042A (en) | 2016-03-02 | 2016-03-02 | Satellite communication system applicable to small ships |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112927390A (en) * | 2020-12-29 | 2021-06-08 | 蓝盾信息安全技术有限公司 | Integration system of marine intelligent gateway, satellite telephone and external satellite antenna |
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