CN108712202A - Evade the method and satellite communication system of co-channel interference by deflecting antenna direction - Google Patents
Evade the method and satellite communication system of co-channel interference by deflecting antenna direction Download PDFInfo
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- CN108712202A CN108712202A CN201810468891.1A CN201810468891A CN108712202A CN 108712202 A CN108712202 A CN 108712202A CN 201810468891 A CN201810468891 A CN 201810468891A CN 108712202 A CN108712202 A CN 108712202A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The present invention relates to a kind of methods and satellite communication system for evading co-channel interference by deflecting antenna direction comprising：More than one satellite antenna is provided on NGEO telecommunication satellites；The constellation configuration and terrestrial user type and distribution situation for determining NGEO satellite communication systems, select the normal direction orientation of antenna on variable description NGEO satellite communication system stars；It is provided according to the interference protection about GEO satellite system of ITU, selects index α of one group of measurement satellite communication system to GEO satellite system interference degree；Requirement according to satellite communication system to self communication quality determines the index β of one group of measurement satellite communication system link-quality；The Non-linear Optimal Model in phased array antenna normal direction orientation is established according to index α and index β；By iteratively solving optimized variable, the plan of establishment is directed toward in a set of optimal phased array antenna deflection of output.This invention ensures that itself communication link quality and reliability requirement so that the satellite system effectively can frequently coexist together with GEO satellite system.
Description
Technical field
The present invention relates to a kind of aerospace engineering fields of communication technology, are evaded by deflecting antenna direction especially with regard to one kind
The method and satellite communication system of co-channel interference.
Background technology
In recent years, propose to build low rail constellation by the emerging business aerospace enterprise group represented of SpaceX, OneWeb as the whole world
Internet access service is provided, and steps up layout and seizes development first chance, a satellite driven by technological innovation and commercial capital
Internet development tide just have swepts the globe.International Telecommunication Union (ITU) is responsible for international spectrum resource and rail as the United Nations
The important mechanism of position resource, carries out the principle of " arrive first first " for frequency application, and the system applied afterwards is needed to there is priority
Satellite system propose frequency coordination, must not be to needing system to be protected especially synchronous satellite system to generate harmful interference.It is huge
Contradiction between big spectrum requirement and limited frequency resource is the key difficulties of the numerous satellite internet development of constraint how
It realizes with GEO satellite system and effectively coexists frequently as the task of top priority of NGEO systems faces together.
Currently, between the NGEO satellite systems and GEO satellite system using Ku and Ka frequency ranges, there are potential frequencies
Interference problem, the main technology for alleviating interference are：When NGEO satellites are located at middle lower latitude overhead, by closing subwave
Beam reduces the overlay area of single satellite, increases the angle of departure with GEO satellite link, forms spatial domain isolation to reduce interference；
When NGEO satellites are located near the overhead of equator, satellite shutdown stops offer service.In order to ensure that NGEO constellations integrally cover model
Enclose unaffected, generally use backup star improves the covering tuple of low rail constellation, and constellation totle drilling cost has been significantly greatly increased.
In the recent period, Oneweb companies propose the technology of a kind of entitled " Progressive Pitch ", and basic principle is to defend
Star antenna gradually tilts cooperation satellite beams and closes, and satellite antenna equatorward tilts in orbit plane always, and tilts
Angle increase with the reduction of latitude, have the symmetrical characteristic of southern hemisphere and northern hemisphere；When satellite is close to equator overhead, satellite must
It must shut down and complete the quick reverse turn operation of antenna tilt angle.This method, which can reach to evade, interferes GEO satellite system same frequency
Effect, but the earth station of mid low latitude region can be caused to access low elevation angle satellite, the carrier-to-noise ratio of entire communication system is by tight
Ghost image is rung.By taking the 1200km orbit altitudes of OneWeb constellations as an example, after the technology, satellite-ground link may farthest increase by 3 times,
Corresponding carrier-to-noise ratio decline reaches 9dB or more.And each rail of satellite is required for adjusting antenna repeatedly in north and south latitude low latitudes
Be directed toward, for low orbit satellite, an orbital period is dozens of minutes, the operation that this frequent adjustment antenna is directed toward to satellite can
Very high challenge is proposed by property and service life.
Invention content
In view of the above-mentioned problems, the object of the present invention is to provide a kind of methods for evading co-channel interference by deflecting antenna direction
And satellite communication system, it is dry to the same frequency of GEO satellite system (including but are not limited to satellite communication system) effectively evading
Under the premise of disturbing, do not significantly reduce system carrier-to-noise ratio, do not increase number of satellites, satellite system without shutdown, can also by be arranged it is quiet
The deflection angle scheme of state avoids operating on frequent star, ensure that itself communication link quality and reliability requirement so that
The satellite system effectively can frequently coexist together with GEO satellite system.
To achieve the above object, the present invention takes following technical scheme：One kind is evaded by deflecting antenna direction with frequently dry
The method disturbed, it is characterised in that include the following steps：1) more than one satellite antenna is provided on NGEO telecommunication satellites；2)
The constellation configuration and terrestrial user type and distribution situation for determining NGEO satellite communication systems, select variable description NGEO satellites
The normal direction orientation of antenna on communication system star；3) it is provided according to the interference protection about GEO satellite system of ITU, selects one group
Weigh index α of the satellite communication system to GEO satellite system interference degree；4) according to satellite communication system to self communication quality
Requirement, determine the index β of one group of measurement satellite communication system link-quality；5) phased array day is established according to index α and index β
Non-linear Optimal Model of the collimation method to orientation；6) by iteratively solving optimized variable, it is inclined to export a set of optimal phased array antenna
Turn to be directed toward the plan of establishment.
Further, in the step 3), weigh satellite communication system to the index α of GEO satellite system interference degree=
[α1,...,αn]T, wherein each index is no more than limit value, α specified in ITU related advisory booksi≤αith, i=1 ...,
n；Wherein, n indicates the number of index, αiIndicate i-th of interference index for describing system interference degree；αithIt indicates i-th
Index corresponds to the limit value specified in ITU recommendations.
Further, in the step 4), the index β=s [ of satellite communication system link-quality is weighed;β1,...,βn]T, βiTable
Show i-th of index for weighing satellite communication system link-quality, i=1 ..., n.
Further, in the step 2), the constellation structure of NGEO satellite communication systems is set according to own system business demand
Type and terrestrial user type and distribution situation, including the classification of track of constellation, orbital plane number, the orbital tracking of each orbital plane and
Satellite distribution situation in face；Ground in the type of terrestrial user, the average distance at ground co-frequency cell center and ground co-frequency cell
The density of face user.
Further, in the step 2), the variables choice in the normal direction orientation of antenna on NGEO satellite communication system stars is described
Method is：Using satellite and the line in the earth's core as axis, on star the normal direction orientation of phased array antenna with two degree of angular freedoms describe θ=
[θ1,θ2]T, θ1For degree of angular freedom 1, θ2For degree of angular freedom 2；Phased array antenna normal direction orientation adjustment is described with time variable t
With the relationship of time.
Further, in the step 5), the Non-linear Optimal Model in phased array antenna normal direction orientation is：
Optimized variable：θ(t)；
Object function：max{β}；
Constraints：αi≤αith, i=1 ..., n and other existing singal reporting codes are constrained.
Further, in the step 3) and step 4), the interference to GEO satellite system accordingly and self communication matter are determined
The method of amount is：The relative position relation of NGEO satellite communication systems and GEO satellite system is calculated first；Then calculating is utilized
Obtained relative position relation seeks the correspondence index for describing the interference to GEO satellite system and self communication quality.
A kind of NGEO satellite communication systems for evading co-channel interference by deflecting antenna direction based on the above method, it is special
Sign is：It include positioned at multiple orbital planes several NGEO satellites form constellation and positioned at the whole world or low latitudes
Several earth stations；There are one above satellite antennas for every satellite；Each satellite in NGEO satellite communication systems is according to the side
The plan of establishment is directed toward in the optimal phased array antenna deflection of method output, chooses the deflection that existing realization method is directed toward satellite antenna
Control realizes while evading with geosynchronous satellite generation co-channel interference, and self communication link performance does not deteriorate significantly
Purpose.
Further, the realization method follows satellite health to rotate using antenna, is deflected by the gesture stability of satellite
Antenna is directed toward；Or include the static real of the installation normal direction by adjusting phased array antenna using antenna itself with respect to star rotation
Existing mode, and antenna normal direction orientation is dynamically adjusted by mechanically or electrically control mode.
A kind of Optimum Design System for evading co-channel interference by deflecting antenna direction, it is characterised in that：The system includes
Mould is arranged to orientation describing module, annoyance level setup measures module, Link Quality Index in antenna method on initialization module, star
Block, Non-linear Optimal Model establish module and scheme output module；The initialization module is for determining NGEO satellite communications system
The constellation configuration and terrestrial user type and distribution situation of system, while being provided with more than one on each NGEO telecommunication satellites
Satellite antenna；Antenna method to orientation describing module is used to that variable description NGEO satellite communication system stars to be selected to go up to the sky on the star
The normal direction orientation of line；The annoyance level setup measures module provides according to ITU about the interference protection of GEO satellite system,
Select index α of one group of measurement satellite communication system to GEO satellite system interference degree；The Link Quality Index setup module
Requirement according to satellite communication system to self communication quality determines the index β of one group of measurement satellite communication system link-quality；
The Non-linear Optimal Model establishes the nonlinear optimization that module establishes phased array antenna normal direction orientation according to index α and index β
Model；By iteratively solving optimized variable, a set of optimal phased array antenna deflection of output is directed toward to be set the scheme output module
Set scheme.
The invention adopts the above technical scheme, which has the following advantages：1, the present invention is by optimizing phased array antenna
Direction scheme increases is isolated angle with the link of GEO satellite system, is effectively evading the co-channel interference premise to GEO satellite system
Under, do not significantly reduce system carrier-to-noise ratio, do not increase number of satellites, satellite system can be static inclined by being arranged without shutdown, also
Gyration scheme avoids operating on frequent star, ensure that itself communication link quality and reliability requirement.2, the present invention with
Existing GEO satellite system same frequency co-existence schemes are compared, and the same frequency to GEO satellite system can be evaded with simple way of realization
Interference, while the communication quality demand of the guarantee own system of maximum possible, and do not increase number of satellites, satellite system without closing
Machine can also avoid operating on frequent star by the way that static deflection angle scheme is arranged, and improve system reliability.3, energy of the present invention
The average covering power for increasing constellation, evades the interference to GEO satellite system, in conjunction with the communication link of satellite communication system itself
Quality requirement optimizes the deflection direction and degree of deflection that antenna is directed toward, and can meet wanting for self communication service quality and reliability
It asks, is reduced to the cost evaded and paid the interference of GEO satellite system.
Description of the drawings
Fig. 1 a are antenna scheme of installation in the prior art under normal conditions；
Fig. 1 b are to deflect antenna in the specific embodiment of the invention to be directed toward scheme schematic diagram；
Fig. 2 a are the operable time percentage schematic diagrames at Universal Terrestrial station when phased array does not deflect in the embodiment of the present invention；
The operable time percentage signal at Universal Terrestrial station when Fig. 2 b are phased array optimal deflections in the embodiment of the present invention
Figure；
Fig. 3 a are effective received signal strength schematic diagrames at Universal Terrestrial station when phased array does not deflect in the embodiment of the present invention；
Effective received signal strength signal at Universal Terrestrial station when Fig. 3 b are phased array optimal deflections in the embodiment of the present invention
Figure；
Fig. 4 a are the constellation and coverage area schematic diagram when phased array does not deflect in the embodiment of the present invention；
Constellation when Fig. 4 b are phased array optimal deflections in the embodiment of the present invention and coverage area schematic diagram.
Specific implementation mode
For especially low rail (LEO) satellite communication system of Non GEO satellite system (NGEO), single star covering
Ability is limited and low latitudes covering tuple is relatively low, and the link angle of LEO satellite communication system and GEO satellite system can be with
The reduction of latitude and reduce, be apparent from, the problem of co-channel interference of low latitudes is the most serious.Phased array antenna is low rail constellation
One of the trend of load development.However current phase array antenna beam scanning angle is limited in scope, it is most of to use phased array
The LEO satellite communication system of antenna is only low latitudes offer continuous one and re-covers lid.When LEO satellite with running to low latitude
When area overhead, it can only be forced to shut down when only LEO link pair GEO satellite systems generate interference, satellite communication system
Without other available links, can not work normally.As shown in Figure 1 a, 1 b, when LEO satellite deflects the direction of phased array antenna,
It increases link between LEO and GEO satellite system and angle is isolated, while increasing the average covering tuple of constellation.In present satellites link
Earth station is switched to next LEO satellite when co-channel interference may occur with GEO satellite system link, and satellite system is without shutdown
It can be realized and the interference of GEO systems is evaded.Optimize the deflection direction and angular dimension that antenna is directed toward, can ensure that earth station connects
Link load when entering next LEO satellite will not dramatically increase.
It deflects there are many modes that satellite system antennas is directed toward, can be that antenna follows satellite health to rotate, i.e., by defending
The gesture stability of star is directed toward to deflect antenna；Can also be the opposite star rotation of antenna itself, including by adjusting phased array day
The installation normal direction (antenna deflection installation) of line carrys out static realization method, and dynamically adjusts antenna by mechanically or electrically controlling
The mode of normal direction.In addition, the link quality requirement in conjunction with satellite communication system itself and the interference protection to GEO satellite system
Standard designs the normal direction prioritization scheme of phased array antenna, with reach under the premise of not interfering GEO satellite system itself obtain compared with
Good communication quality and the purpose for improving reliability.The present invention is described in detail below with reference to the accompanying drawings and embodiments.
The present invention provides a kind of method for evading co-channel interference by deflecting antenna direction, and this method is logical for NGEO satellites
In letter system comprising following steps：
1) more than one satellite antenna is provided on NGEO telecommunication satellites；
2) the constellation configuration and terrestrial user type and distribution situation for determining NGEO satellite communication systems, select variable to retouch
State the normal direction orientation of antenna on NGEO satellite communication system stars；
According to the constellation configuration of own system business demand setting NGEO satellite communication systems and terrestrial user type and divide
Cloth situation, including but not limited to the following aspects：Classification of track, the orbital plane number of constellation, the orbital tracking of each orbital plane
And satellite distribution situation in face；In the type of terrestrial user, the average distance and ground co-frequency cell at ground co-frequency cell center
The density etc. of terrestrial user；
The Variable Selection in the normal direction orientation of antenna is on description NGEO satellite communication system stars：Due to the antenna of satellite
It needs to establish link with terrestrial user antenna, using satellite and the line in the earth's core as axis, the normal direction orientation of phased array antenna can on star
To describe θ=s [ with two degree of angular freedoms;θ1,θ2]T, θ1For degree of angular freedom 1, θ2For degree of angular freedom 2, wherein the deflection of antenna normal direction
It is not limited in satellite orbit plane or any other plane；Phased array antenna normal direction orientation is described with time variable t
Adjustment and the relationship of time, but installed if the deflection of antenna, then belong to static deflection mode, i.e., antenna normal direction orientation and when
Between it is unrelated；
3) it is provided according to the interference protection about GEO satellite system of ITU, selects one group of measurement satellite communication system pair
The index α=s [ of GEO satellite system interference degree;α1,...,αn]T, such as interference-to-noise ratio I/N, carrier interference ratio C/I, wherein each
Index is no more than limit value, i.e. α specified in ITU related advisory booksi≤αith, i=1 ..., n；Wherein, I indicates interference letter
Number power；N indicates that GEO satellite system receiver noise power, C indicate the carrier signal power of GEO satellite system receiving terminal；n
Indicate the number of index, αiIndicate i-th of interference index for describing system interference degree；αithIndicate that i-th of index corresponds to
The limit value specified in ITU recommendations；
4) requirement according to satellite communication system to self communication quality determines one group of measurement satellite communication system link matter
The index β=s [ of amount;β1,...,βn]T, such as receiver carrier-to-noise ratio C/N and earth station's available duration accounting；βiIndicate i-th of use
In the index for weighing satellite communication system link-quality, i=1 ..., n；
5) Non-linear Optimal Model in phased array antenna normal direction orientation is established according to index α and index β；
The Non-linear Optimal Model in phased array antenna normal direction orientation is：
Optimized variable：θ(t)；
Object function：max{β}；
Constraints：αi≤αith, i=1 ..., n and other existing singal reporting codes are constrained, for example, receiving terminal noise
It is more than receiver signal-noise ratio threshold than SNR, earth station's available duration accounting meets system uptime accounting requirement etc.；
6) by iteratively solving optimized variable θ (t), setting side is directed toward to export a set of optimal phased array antenna deflection
Case.
Above-mentioned steps 3) and step 4) in, determine the side of the interference to GEO satellite system and self communication quality accordingly
Method is：The relative position relation for calculating NGEO satellite communication systems and GEO satellite system first is done such as communication link distance
Disturb the angle etc. of link range and communication link and interfering link；Then calculated relative position relation is sought
Correspondence index for describing the interference to GEO satellite system and self communication quality.
Based on the above method, the present invention also provides a kind of NGEO satellites for evading co-channel interference by deflecting antenna direction to lead to
Letter system comprising be located at the constellation of several NGEO satellites composition of multiple orbital planes and positioned at global or low latitudes
Several earth stations；There are one above satellite antennas for every satellite.Wherein, each satellite in NGEO satellite communication systems is according to upper
The plan of establishment is directed toward in the optimal phased array antenna deflection for stating method output, chooses what existing realization method was directed toward satellite antenna
Deflection control realizes while evading with geosynchronous satellite generation co-channel interference, and self communication link performance is not notable
The purpose of deterioration.In the present embodiment, realization method can be that antenna follows satellite health to rotate, that is, pass through the posture control of satellite
System is directed toward to deflect antenna；It can also be the opposite star rotation of antenna itself, include the Method for Installation by adjusting phased array antenna
Antenna normal direction is dynamically adjusted to the static realization method such as (antenna deflection installation), and by the modes such as mechanically or electrically controlling
Orientation.
The present invention also provides a kind of Optimum Design Systems for evading co-channel interference by deflecting antenna direction comprising initial
Change module, on star antenna method to orientation describing module, annoyance level setup measures module, Link Quality Index setup module, non-
Linear optimization model building module and scheme output module.
Constellation configuration and terrestrial user type and distribution feelings of the initialization module for determining NGEO satellite communication systems
Condition, while being provided with more than one satellite antenna on each NGEO telecommunication satellites；
Antenna method is used to select the method for antenna on variable description NGEO satellite communication system stars to orientation describing module on star
To orientation；
Annoyance level setup measures module is provided according to the interference protection about GEO satellite system of ITU, selects one group of weighing apparatus
Measure index α of the satellite communication system to GEO satellite system interference degree；
Requirement of the Link Quality Index setup module according to satellite communication system to self communication quality determines one group of measurement
The index β of satellite communication system link-quality；
Non-linear Optimal Model establishes module and establishes the non-linear of phased array antenna normal direction orientation according to index α and index β
Optimized model；
Scheme output module is directed toward setting by iteratively solving optimized variable, a set of optimal phased array antenna deflection of output
Scheme.
Embodiment：
Satellite communication system is low rail (LEO) Walker constellation, NesA earth station is intensive uniformly distributed in the whole world.LEO stars
That there are downstream frequencies is overlapping with GEO bands for seat, and the orbit parameter of two systems is as shown in table 1.
The simulation parameter of table 1 LEO constellations and GEO bands
Choose roll angle Ψ and pitch angle Θ under antenna coordinate system describe antenna method on star to orientation, it is assumed that antenna
(being unrelated with the time) is installed in deflection, then θ=s [Ψ,Θ]T；Interference-to-noise ratio I/N is chosen as measurement satellite system to GEO systems
The index of annoyance level, according to the relevant regulations of ITU recommendations, I/N is less than the threshold value equal to -12.2dB as defined in ITU；
Choose carrier-to-noise ratio C/N, earth station's available duration accountingAs the index for weighing satellite system link-quality.
After description variable and evaluation index is determined, the interference to GEO systems accordingly and self communication matter need to be determined
The computational methods of amount.Interference and self communication quality of this example using the method analytical Calculation LEO constellations of statistics to GEO bands.
For a constellation, reference satellite state in constellation once it is determined that, the state of other satellites of constellation also uniquely determines,
I.e. entire constellation the traversal of time-domain be actually equivalent to reference satellite state feasible zone traversal.Since LEO constellations are
The state of Walker constellation configurations, reference satellite can be defined as x=[Ω0M0]T, wherein Ω0And M0Respectively reference satellite
Right ascension of ascending node and mean anomaly.Then the state of other satellites can be expressed as：
Wherein, N is satellite number, and P is orbital plane number, and F is phase factor.
Time-domain is mapped to status field, each time sampling point corresponds to a reference satellite state samples.Assuming that
The Ω of reference satellite0And M0Space is by NdA discrete point decile, then altogetherA state, in the corresponding constellation of each state samples
The state of other satellites can be calculated by (1) formula and be obtained.For k-th of state samples, it is available to define m-th of earth station
For in the presence of an at least LEO satellite link can be established with it, and link radiation to each GEO system receiving terminals I/N respectively less than-
12.2dB, corresponding δi,k=1, otherwise δi,k=0；The carrier-to-noise ratio for defining institute's link connection receiving terminal of m-th of earth station is (C/N
)i,k.Entire state space is traversed, the available of m-th earth station is calculated by space geometry relationship and link budget formula
Duration accountingReceiving terminal average signal-to-noise ratio is
Further, following Non-linear Optimal Model is constructed：
Optimized variable：[Ψ,Θ]T；
Object function：
Constraints：
Phase is completed using the track constant and LEO, GEO system communication parameter that are provided in table 2 and above-mentioned Analytic Calculation
It should emulate, exporting optimum deflection antenna by continuous iteration is oriented to Ψ=- 5.26 °, Θ=11.57 °.The day of comparison deflection below
Line installs the simulation result with conventional aerial installation (Ψ=0 °, Θ=0 °).As shown in table 3, it can be found that worst earth station is flat
Equal pot life percentage is promoted from 69.23% to 95.11%, and worst earth station effectively receives under power only 23.18dB
22.08dB is dropped to, the carrier-to-noise ratio less than 2dB is only sacrificed, has exchanged the significantly promotion of earth station's available duration for.
2 orbit parameter of table and LEO and GEO system communication parameters
3 worst earth station's communication performance of table compares
As shown in Fig. 2 a~Fig. 3 b, it compared the effective time percentage in table 3 in the case of two kinds and effectively receive
Power, it can be found that after using the deflection of the static antennas of this example optimal, the LEO earth stations operable time of low latitudes
Percentage is significantly improved, and the cost paid is that there are certain 1 to arrive for effective reception power of low latitudes earth station
The reduction of 2dB influences very little to the link-quality of LEO systems.Fig. 4 a, Fig. 4 b give the wave beam that two kinds of constellations are listed in table 3
Coverage condition, it can be found that after deflecting the installation direction of phased array antenna, the coverage area of satellite beams is extended, into one
Step improves the covering tuple in low latitudes LEO constellations.
It should be pointed out that SSO (Sun Synchronous Orbit) Walker constellations, antenna static deflection angular arrangements given by the present embodiment and building
Mould and optimization method etc. are all a kind of realizations of technology according to the present invention, which is not limited to SSO (Sun Synchronous Orbit) constellation or Walker
Constellation does not limit to static antenna deflection angle scheme, is not limited to the reconciliation of the evaluation indexes such as I/N, C/N, available duration accounting
Analyse modeling and optimization method.In addition, the technical solution is also not limited to evade the interference to GEO satellite, can also be applied to evade
To the co-channel interference of certain non-geo satellite systems, such as it is operated in the O3b satellite systems of 8000km height equatorial orbits.
As the above analysis, proposed by the present invention to evade and being defended with what geosynchronous satellite interfered by deflecting antenna direction
Star communication system can effectively evade the co-channel interference to GEO systems, do not significantly reduce system carrier-to-noise ratio, do not increase satellite
Number, satellite system can avoid operating on frequent star without shutdown, also by the way that static deflection angle scheme is arranged, and ensure that
The communication link quality and reliability requirement of itself.
The various embodiments described above are merely to illustrate the present invention, and each step may be changed, in the technology of the present invention
On the basis of scheme, all improvement carried out to separate step according to the principle of the invention and equivalents should not be excluded in this hair
Except bright protection domain.
Claims (10)
1. a kind of method for evading co-channel interference by deflecting antenna direction, it is characterised in that include the following steps：
1) more than one satellite antenna is provided on NGEO telecommunication satellites；
2) the constellation configuration and terrestrial user type and distribution situation for determining NGEO satellite communication systems, select variable description
The normal direction orientation of antenna on NGEO satellite communication system stars；
3) it is provided according to the interference protection about GEO satellite system of ITU, one group of measurement satellite communication system is selected to defend GEO
The index α of star system annoyance level；
4) requirement according to satellite communication system to self communication quality determines one group of measurement satellite communication system link-quality
Index β；
5) Non-linear Optimal Model in phased array antenna normal direction orientation is established according to index α and index β；
6) by iteratively solving optimized variable, the plan of establishment is directed toward in a set of optimal phased array antenna deflection of output.
2. the method as described in claim 1, it is characterised in that：In the step 3), satellite communication system is weighed to GEO satellite
The index α=s [ of system interference degree;α1,...,αn]T, wherein each index is no more than specified in ITU related advisory books
Limit value, αi≤αith, i=1 ..., n；Wherein, n indicates the number of index, αiI-th is indicated for describing system interference degree
Interfere index；αithIndicate that i-th of index corresponds to the limit value specified in ITU recommendations.
3. the method as described in claim 1, it is characterised in that：In the step 4), satellite communication system link-quality is weighed
Index β=s [β1,...,βn]T, βiI-th is indicated for weighing the index of satellite communication system link-quality, i=1 ...,
n。
4. the method as described in claim 1, it is characterised in that：In the step 2), it is arranged according to own system business demand
The constellation configuration and terrestrial user type and distribution situation of NGEO satellite communication systems, including the classification of track of constellation, orbital plane
It counts, satellite distribution situation in the orbital tracking of each orbital plane and face；The type of terrestrial user, ground co-frequency cell center it is flat
The density of terrestrial user in equal distance and ground co-frequency cell.
5. the method as described in claim 1, it is characterised in that：In the step 2), describe on NGEO satellite communication system stars
The Variable Selection in the normal direction orientation of antenna is：Using satellite and the line in the earth's core as axis, the normal direction side of phased array antenna on star
Position describes θ=s [ with two degree of angular freedoms;θ1,θ2]T, θ1For degree of angular freedom 1, θ2For degree of angular freedom 2；It is described with time variable t
The relationship of phased array antenna normal direction orientation adjustment and time.
6. the method as described in claim 1, it is characterised in that：In the step 5), phased array antenna normal direction orientation it is non-thread
Property Optimized model is：
Optimized variable：θ(t)；
Object function：max{β}；
Constraints：αi≤αith, i=1 ..., n and other existing singal reporting codes are constrained.
7. such as claim 1~6 any one of them method, it is characterised in that：In the step 3) and step 4), determine corresponding
Be to the interference of GEO satellite system and the method for self communication quality：NGEO satellite communication systems are calculated first to defend with GEO
The relative position relation of star system；Then calculated relative position relation is sought for describing to GEO satellite system
Interference and self communication quality correspondence index.
8. a kind of based on being directed toward such as any one of claim 1~7 the method and to evade co-channel interference by deflecting antenna
NGEO satellite communication systems, it is characterised in that：It include positioned at multiple orbital planes several NGEO satellites form constellation and
Positioned at the whole world or several earth stations of low latitudes；There are one above satellite antennas for every satellite；NGEO satellite communications system
The plan of establishment is directed toward in the optimal phased array antenna deflection that each satellite in system is exported according to the method, chooses existing realization side
Formula controls the deflection that satellite antenna is directed toward, and realizes while evading with geosynchronous satellite generation co-channel interference, itself
The purpose that communication link performance does not deteriorate significantly.
9. system as claimed in claim 8, it is characterised in that：The realization method follows satellite health to rotate using antenna,
It is directed toward by the gesture stability of satellite to deflect antenna；Or using antenna itself with respect to star rotation, including by adjusting phased
The static realization method of the installation normal direction of array antenna, and antenna normal direction side is dynamically adjusted by mechanically or electrically control mode
Position.
10. a kind of Optimum Design System for evading co-channel interference by deflecting antenna direction, it is characterised in that：The system includes just
In beginningization module, star antenna method to orientation describing module, annoyance level setup measures module, Link Quality Index setup module,
Non-linear Optimal Model establishes module and scheme output module；
Constellation configuration and terrestrial user type and distribution feelings of the initialization module for determining NGEO satellite communication systems
Condition, while being provided with more than one satellite antenna on each NGEO telecommunication satellites；
Antenna method is used to select the method for antenna on variable description NGEO satellite communication system stars to orientation describing module on the star
To orientation；
The annoyance level setup measures module is provided according to the interference protection about GEO satellite system of ITU, selects one group of weighing apparatus
Measure index α of the satellite communication system to GEO satellite system interference degree；
Requirement of the Link Quality Index setup module according to satellite communication system to self communication quality, determines one group of measurement
The index β of satellite communication system link-quality；
The Non-linear Optimal Model establishes module and establishes the non-linear of phased array antenna normal direction orientation according to index α and index β
Optimized model；
The scheme output module is directed toward setting by iteratively solving optimized variable, a set of optimal phased array antenna deflection of output
Scheme.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239848A (en) * | 1998-05-07 | 1999-12-29 | 洛拉尔太空通讯公司 | Two-way/broadcast mobile and portable satellite communications system |
| CN1486545A (en) * | 2000-11-13 | 2004-03-31 | Լ����E����ķ | System and method for implementing a constellation of non-geostationary satellites that does not interfere with the geostationary satellite ring |
| CN106027138A (en) * | 2016-05-05 | 2016-10-12 | 清华大学 | Ground station system and method for avoiding collinear interference with geostationary satellite |
| CN107210805A (en) * | 2014-11-24 | 2017-09-26 | 世界卫星有限公司 | Make the communication satellite system of interference reduction |
| WO2017190094A1 (en) * | 2016-04-28 | 2017-11-02 | Cloud Constellation Corporation | Intermediary satellite network for cross-strapping and local network decongestion |
| CN107342804A (en) * | 2016-04-28 | 2017-11-10 | 北京大学 | Suppress the method for adjacent star interference in satellite communication system |
| CN107408979A (en) * | 2015-04-03 | 2017-11-28 | 高通股份有限公司 | For the method and apparatus for the interference limitation for avoiding exceeding native to this world stationary satellite system |
| US20180062737A1 (en) * | 2016-08-30 | 2018-03-01 | Worldvu Satellites Limited | Satellite System Comprising Satellites in LEO and Other Orbits |
| CN107809298A (en) * | 2017-10-16 | 2018-03-16 | 清华大学 | A kind of method for gso satellite communication system disturb analysis and evade |
-
2018
- 2018-05-16 CN CN201810468891.1A patent/CN108712202B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239848A (en) * | 1998-05-07 | 1999-12-29 | 洛拉尔太空通讯公司 | Two-way/broadcast mobile and portable satellite communications system |
| CN1486545A (en) * | 2000-11-13 | 2004-03-31 | Լ����E����ķ | System and method for implementing a constellation of non-geostationary satellites that does not interfere with the geostationary satellite ring |
| CN107210805A (en) * | 2014-11-24 | 2017-09-26 | 世界卫星有限公司 | Make the communication satellite system of interference reduction |
| CN107408979A (en) * | 2015-04-03 | 2017-11-28 | 高通股份有限公司 | For the method and apparatus for the interference limitation for avoiding exceeding native to this world stationary satellite system |
| WO2017190094A1 (en) * | 2016-04-28 | 2017-11-02 | Cloud Constellation Corporation | Intermediary satellite network for cross-strapping and local network decongestion |
| CN107342804A (en) * | 2016-04-28 | 2017-11-10 | 北京大学 | Suppress the method for adjacent star interference in satellite communication system |
| CN106027138A (en) * | 2016-05-05 | 2016-10-12 | 清华大学 | Ground station system and method for avoiding collinear interference with geostationary satellite |
| US20180062737A1 (en) * | 2016-08-30 | 2018-03-01 | Worldvu Satellites Limited | Satellite System Comprising Satellites in LEO and Other Orbits |
| CN107809298A (en) * | 2017-10-16 | 2018-03-16 | 清华大学 | A kind of method for gso satellite communication system disturb analysis and evade |
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