CN208350984U - A kind of antenna angle-measuring equipment for AIS communication system - Google Patents
A kind of antenna angle-measuring equipment for AIS communication system Download PDFInfo
- Publication number
- CN208350984U CN208350984U CN201821093611.5U CN201821093611U CN208350984U CN 208350984 U CN208350984 U CN 208350984U CN 201821093611 U CN201821093611 U CN 201821093611U CN 208350984 U CN208350984 U CN 208350984U
- Authority
- CN
- China
- Prior art keywords
- frequency
- communication system
- ais
- radio
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The utility model discloses a kind of antenna angle-measuring equipments for AIS communication system, including radio-frequency transmitter, splitter, phase or amplitude comparator and baseband processor, the radio-frequency transmitter is separately connected splitter and phase or amplitude comparator, phase or amplitude comparator are also connected with baseband processor, and the utility model, which provides, can be used for measuring the function of receiving sense in AIS communication system.Realizing can be according to the direction for receiving signal, to realize the direction propagation of AIS information in AIS communication system.This technology and other maritime communication technology fit applications, which can also be realized, to be improved the communication distance of maritime communication system, reduces noise, improves the functions such as emission effciency.
Description
Technical field
It is specifically a kind of for AIS communication system the utility model relates to the field of communication technology of maritime electronic equipment
Antenna angle-measuring equipment.
Background technique
In recent years, with the rapid development of ship science and technology and the emergence of marine economy, the status of maritime traffic transport is increasingly
Significantly, world shipping market has obtained unprecedented expansion and development.The fast development of world shipping industry is bringing huge warp
While interests of helping, maritime traffic situation is also made to become to become increasingly complex.
AIS communication system is a kind of effective Collision Avoidance At Sea, navigation, navaid security system, be since radar application again
One advanced maritime communication system.According to the mandatory requirement of International Maritime Organization (IMO), all 300 tons or more the worlds are navigated at present
Oceangoing ship and 500 tons or more non-International Voyage Ship of navigating have been mounted with AIS equipment.Although current spitkit is not forced to pacify
This equipment is filled, but due to the report position characteristic certainly of AIS and gradually decreasing for manufacturing cost, AIS is gradually applied to sea area sense
Know, surface monitoring, hydrometeorology, rescue at sea, assist in identifying, lie fallow, is environmentally friendly, seizing smugglers or smuggled goods, combat terrorism etc..It is international
Telecommunication union (ITU) and International Maritime Organization are the making subjects of AIS technical standard.
AIS system is by broadcast communication mode, with self-organizing time division multiple acess TDMA (Time Division Multiple
Access it is) communication protocol, establishes what navigation data exchanged between some other ship and the seashore station with around in this ship
System.AIS transmitter works on two VHF (very high frequency(VHF)) channels, and each channel will respectively be divided into 2250 time slots per minute, often
Ship emits signal to surrounding using a time slot every time.When work on two channels alternate emission AIS information.
Since AIS system uses VHF communication, being restricted by frequency characteristic used in VHF, its communication distance is relatively limited, and one
As communication distance be about 20 to 50 nautical miles or so.Its practical communication distance depends on transmission power, receiving sensitivity, weather conditions
With the factors such as antenna height.
AIS satellite system SAT-AIS (Satellite AIS) is gradually adopted a kind of ship's fix skill in recent years
Art, the AIS message information that system is sent by the satellite reception ship of low orbit, satellite is then by the AIS after receiving the decode
Message information is transmitted to corresponding earth station, and AIS message information is pushed to internet again by earth station, for needing to obtain information
Terminal access, to realize the long-range propagation of AIS information.Although AIS satellite system extends spread scope, but due to needing
By the switching of earth station and the delay of internet, so there are hysteresis for the propagation of information.This lag is for emergency
It is sometimes unacceptable for the very high information of the requirement of real-time such as alarm, wave forecast, rescue and relief work.Secondly as AIS
Terminal must keep the connection of internet, and the access rate of internet, which are one, for the ship in blue water to neglect
Depending on expenditure.
On the other hand, for the slot efficiency of whole world AIS channel, at present major port and some interior river valleies when
Gap utilization rate is higher, some congestion phenomenon even occur, but on the ground for occupying the most of ocean in sea area He closing on bank base
The utilization rate of square AIS channel is still very low.Such as in Atlantic Oceanic Region of about 120 nautical miles from Liverpool, UK, although being in
The main channel of American-European cargo transport, the utilization rate of AIS channel only have 20% or so, and remaining about 80% time slot is in idle shape
State.
Based on this, it is necessary to which the AIS communication system for designing a kind of optimization can use the free timeslot realization information of channel
Force transfer, so that the AIS information sent from first AIS terminal is delivered in relays by multiple AIS receivers, be traveled to
Farther place is gone.A key technology for realizing this system is exactly that AIS terminal can identify the AIS information source received
Direction, to realize the direction propagation of AIS information, avoid AIS information constantly repeat to send in two or more terminal rooms or
Person to hair, wastes the communication resource back and forth.This technology and other maritime communication technology fit applications can also realize improve maritime affairs without
The communication distance of line communication system reduces the functions such as noise.
The antenna of current AIS terminal use isotropic receiving antenna, thus and do not have measurement receive signal angle function
It can, it is therefore necessary to design a kind of antenna angle-measuring method and device for AIS communication system.
Utility model content
It is above-mentioned to solve the purpose of this utility model is to provide a kind of antenna angle-measuring equipment for AIS communication system
The problem of being proposed in background technique.
To achieve the above object, the utility model provides the following technical solutions:
A kind of antenna angle-measuring equipment for AIS communication system, including radio-frequency transmitter, splitter, phase or amplitude ratio
Compared with device and baseband processor, the radio-frequency transmitter is separately connected splitter and phase or amplitude comparator, phase or amplitude ratio
Baseband processor is also connected with compared with device.
As a further solution of the present invention: being also connected with local oscillator on the splitter.
As a further solution of the present invention: the radio-frequency transmitter has multiple, multiple radio-frequency transmitters are and solely
Vertical receiving antenna is connected, and multiple receiving antennas rearrange aerial array.
The antenna angle-measuring equipment for maritime communication as a further solution of the present invention, feature
It is, the local oscillator is voltage controlled oscillator.
The radio-frequency transmitter includes that radio-frequency front-end, frequency mixer, intermediate frequency are put as a further solution of the present invention,
Big device and automatic gain controller, radio-frequency front-end connect frequency mixer, radio-frequency front-end, frequency mixer, intermediate frequency amplifier and automatic gain
Controller connection intermediate frequency amplifier and splitter, intermediate frequency amplifier are also respectively connected with phase or amplitude comparator and automatic gain control
Device processed.
Compared with prior art, the utility model has the beneficial effects that provide can in AIS communication system for the utility model
For measuring the function of receiving the direction of signal.Realizing can be according to the direction for receiving signal, in turn in AIS communication system
Realize the direction propagation of AIS information.This technology and other maritime communication technology fit applications can also realize that raising maritime affairs are wireless
The communication distance of communication system reduces noise, improves the functions such as emission effciency.
Detailed description of the invention
Fig. 1 is a kind of system structure diagram of antenna angle-measuring equipment for AIS communication system of the utility model.
Fig. 2 is the detailed maps of radio-frequency transmitter internal structure in Fig. 1.
Fig. 3 is the calculation method schematic diagram of the antenna angle-measuring equipment for AIS communication system.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-3 is please referred to, embodiment 1: in the utility model embodiment, a kind of antenna angle measurement for AIS communication system
Device, the antenna receiving array being made of multiple independent radio-frequency transmitters, phase or amplitude comparator 2, baseband processor 3,
Local oscillator 4, splitter 5 collectively constitute.
Multiple independent radio-frequency transmitters are connected with external antenna, and mutiple antennas array element rearranges aerial array.Every group
The radiofrequency signal that radio-frequency transmitter individual reception antenna transmits, and it is ultimately routed to phase or amplitude comparator 2, it does further
Processing.
Phase or amplitude comparator 2 are connected with multi-channel rf receiver, to the phase or vibration of the intermediate-freuqncy signal received
Width (or both simultaneously) is compared.
Baseband processor 3 is connected with phase or amplitude comparator 2, for the intermediate-freuqncy signal after comparison, further completes mould
Number conversion (A/D), digital processing, thus digital signal of the output for judging antenna array receiver to signal angle.Local oscillator 4 is logical
Often it is frequency oscillator, low frequency signal is generated, for being mixed with high-frequency signal.Preferably, the utility model is using voltage-controlled
Oscillator.Splitter 5 and local oscillator 4 connect, and connect to every road is sent into after amplifying, match from the low frequency signal that local oscillator 4 receives
The frequency mixer 1.2 of receipts machine carries out down conversion process.
Radio-frequency transmitter is connected with external antenna.The radiofrequency signal that radio-frequency transmitter individual reception antenna transmits.Radio frequency connects
Receipts machine includes radio-frequency front-end 1.1, frequency mixer 1.2, intermediate frequency amplifier 1.3 and automatic gain controller 1.4.Outside radio-frequency front-end 1.1
Antenna is connect, the radiofrequency signal to come from antenna reception is filtered, low noise amplification, is then fed into frequency mixer 1.2.Frequency mixer
1.2 and radio-frequency front-end 1.1 connect, mixed to the radiofrequency signal that comes of reception and by the low frequency signal that splitter 5 sends over
Frequently, so that radiofrequency signal is mixed down to intermediate frequency.Intermediate frequency amplifier 1.3 and frequency mixer 1.2 connect, and amplify place to intermediate-freuqncy signal
Reason.Automatic gain controller 1.4 and intermediate frequency amplifier 1.3 connect, and receive the signal sent out from intermediate frequency amplifier 1.3,
To dynamically adjust gain parameter according to signal amplitude, intermediate frequency amplifier 1.3 is fed back to.
Further below for the implementation method of the utility model carry out it is detailed for example, in this example using phase or
Amplitude comparator calculates different antennae and receives the phase difference of signal to judge the direction of reception signal.Similar, this is practical new
The different antennae of implementing to calculate using phase or amplitude comparator 2 of type receives the difference of vibration of signal to judge to receive signal
Direction.
The baseline length of two antennas as shown in Figure 3 is d, and target direction angle is θ, and AIS transmitting signal is expressed as
To which the signal that described two antennas receive is just are as follows:
Wherein t1, t2 are respectively the reception signal in the airborne spread time for reaching two antennas, f0It is signal in sky
Frequencies of propagation in gas.
As shown in figure 3, the reception signal is in the propagation distance poor (wave path-difference) for reaching two antennas
Δ R=d sin θ ... ... (4)
Therefore, the signal that receives is indicated in the propagation phase difference for reaching two antennas are as follows:
Wherein c is the speed that wireless signal is propagated in air.
Formula (5) after deformation by showing are as follows:
It can be released by formula (6) as a result: in known wavelength (λ), phase difference (φ) and two receiver antennas
In the case where spatial coordinate location distance (d), the sine value (Sin θ) for receiving signal angle can be obtained by numerical operation, from
And extrapolate the angle, θ for receiving signal.
Due to easy to accomplish than phase on lower frequency, therefore the height for receiving described two antennas that the utility model is preferential
Frequency signal carries out after being mixed with same local oscillation signal, then in intermediate frequency than phase.Computing Principle that implementing phase compares and above institute
It states identical.
Because there is very big error and randomness in the processing result of two receivers, thus the utility model it is preferential selection it is more
A (being greater than 2) radio-frequency transmitter forms array acceptor, calculates the difference of mutual phase or amplitude, then optimizes processing.
The Computing Principle and the same as above of phase or Amplitude Comparison is embodied.
Embodiment 2: the local oscillator 4 in the design uses voltage controlled oscillator, and only transceiver does not provide stable local oscillation signal,
Clock signal needed for entire circuit being generated with frequency multiplication.Its phase noise, adjusts sensitivity to wireless receipts at adjustable range
The performance of hair machine has a significant impact.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of antenna angle-measuring equipment for AIS communication system, including radio-frequency transmitter, splitter, phase or Amplitude Comparison
Device and baseband processor, which is characterized in that the radio-frequency transmitter is separately connected splitter and phase or amplitude comparator, phase
Or amplitude comparator is also connected with baseband processor.
2. the antenna angle-measuring equipment according to claim 1 for AIS communication system, which is characterized in that the splitter
On be also connected with local oscillator.
3. the antenna angle-measuring equipment according to claim 1 for AIS communication system, which is characterized in that the radio frequency connects
Receipts machine has multiple, and multiple radio-frequency transmitters are connected with independent receiving antenna, and multiple receiving antennas rearrange antenna array
Column.
4. the antenna angle-measuring equipment according to claim 2 for AIS communication system, which is characterized in that the local oscillator is
Voltage controlled oscillator.
5. the antenna angle-measuring equipment according to claim 1 for AIS communication system, which is characterized in that the radio frequency connects
Receipts machine includes radio-frequency front-end, frequency mixer, intermediate frequency amplifier and automatic gain controller, and radio-frequency front-end connects frequency mixer, before radio frequency
End, frequency mixer, intermediate frequency amplifier and automatic gain controller connect intermediate frequency amplifier and splitter, and intermediate frequency amplifier also connects respectively
Connect phase or amplitude comparator and automatic gain controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821093611.5U CN208350984U (en) | 2018-07-11 | 2018-07-11 | A kind of antenna angle-measuring equipment for AIS communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821093611.5U CN208350984U (en) | 2018-07-11 | 2018-07-11 | A kind of antenna angle-measuring equipment for AIS communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208350984U true CN208350984U (en) | 2019-01-08 |
Family
ID=64905882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821093611.5U Active CN208350984U (en) | 2018-07-11 | 2018-07-11 | A kind of antenna angle-measuring equipment for AIS communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208350984U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594167A (en) * | 2018-07-11 | 2018-09-28 | 深圳市夸克云电子信息技术有限公司 | A kind of antenna angle-measuring equipment for AIS communication systems |
-
2018
- 2018-07-11 CN CN201821093611.5U patent/CN208350984U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594167A (en) * | 2018-07-11 | 2018-09-28 | 深圳市夸克云电子信息技术有限公司 | A kind of antenna angle-measuring equipment for AIS communication systems |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150295308A1 (en) | Antenna System | |
| CN113285897A (en) | Positioning information assistance-based channel estimation method and system in RIS system under Internet of vehicles environment | |
| CN104679032A (en) | Dynamic antenna adjustment and communication method by utilizing shore-based base station and ship location information | |
| KR101131944B1 (en) | Vessel traffic system | |
| CN103869347A (en) | Beidou satellite navigation and positioning system | |
| Evans et al. | Consumer radar: Opportunities and challenges | |
| KR20180088058A (en) | Medium to long-range victim racking and tracing system on coastal areas | |
| CN208350984U (en) | A kind of antenna angle-measuring equipment for AIS communication system | |
| KR20200012897A (en) | Apparatus and method for receiving satellite positioning signals | |
| EP2003787B1 (en) | Wireless network system | |
| US11698453B2 (en) | Environment scanning using a cellular network | |
| JP6679089B2 (en) | Array antenna device | |
| CN108594167A (en) | A kind of antenna angle-measuring equipment for AIS communication systems | |
| CN104092024B (en) | Direction backtracking system based on corner reflector antenna array | |
| JP2012191281A (en) | Radio communication device | |
| JP2002141853A (en) | Radio communication equipment | |
| CN204045720U (en) | Ocean engineering ship and platform low interference communications antenna deck | |
| CN113534062A (en) | Radar, method for transmitting radar signal, and computer-readable storage medium | |
| CN203759250U (en) | BeiDou navigation and positioning satellite system | |
| Aldalbahi et al. | Digital compass for multi-user beam access in mmWave cellular networks | |
| Souzandeh et al. | Classification of Frequency Bands in the Joint Millimeter-Wave Sensing and Communication System (JSCS): A Comprehensive Analysis | |
| CN114755634A (en) | Radar communication integrated signal sending method, receiving method and equipment | |
| CN110780324A (en) | Electronic ship board based on real-time connection of Internet of things | |
| CN104270165A (en) | Integrated system of radio frequency transceivers of air traffic collision avoidance system and S mode responder | |
| RU2518062C1 (en) | Radar system for monitoring near-earth space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |