CN110266362A - A kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave - Google Patents
A kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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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
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
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Abstract
The present invention proposes a kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave, in the group of stars communication system based on millimeter wave.The method of the present invention adjusts the beam position of satellite according to the location information of satellites all in a group of stars, so that an only transmission satellite or reception satellite in each beam coverage, solve the problems, such as interfering with each other between inter-satellite link.The present invention executes wave beam biasing in the association wave beam forming training A-BFT time slot of beacon interval；Wave beam biasing is the addition wave beam angle of eccentricity on the beam direction that satellite is currently aligned；So that the achievable rate at group of stars network is maximum, the genetic algorithm for passing through optimization obtains wave beam angle of eccentricity.The present invention is managed Beam resources limited on satellite with the angle of resource management, the best direction of each wave beam is calculated by the genetic algorithm of optimization, it realizes wave beam biasing, is interfered with each other between inter-satellite link caused by solving the problems, such as millimeter-wave technology in group of stars mobile communication.
Description
Technical field
The invention belongs to interfere with each other suppression technology field between inter-satellite link, it is related to millimeter wave group of stars multi-beam and receives culminant star
Between link interference inhibit method.
Background technique
Millimeter wave refers to frequency in 30GHz~300GHz, the electromagnetic wave that wave-length coverage is 1~10 millimeter.Utilize millimeter wave
Big bandwidth in frequency range, can provide the transmission rate of gigabits/second, allow to meet the multimedia of bandwidth intensive
Using.And the inter-satellite link being made of millimeter wave has message capacity big, strong antijamming capability, frequency spectrum resource is relatively sufficient
The characteristics of.Therefore millimetre-wave attenuator is considered as the most technology of prospect in satellite network.A moonlet group of stars refers to be defended by two classes
The satellite system of star composition is the auxiliary star for being located at the primary of satellite group center and being distributed in around primary respectively.Form a group of stars
Moonlet can complete the normal work to do such as communication, navigation, remote sensing and by scheduling enhancing to hot zones alone or synergistically
Maximum resource utilization is realized in covering.Compared to the manufacturing process of single traditional large satellite complexity, high manufacturing cost and
The very long development cycle, function same as large satellite can be realized by cooperating between star by forming group of stars system by more moonlets
Can, at the same form a group of stars each moonlet can by substitute mutually, supplement emit in a manner of enhance satellite network flexibility,
Reliability and anti-interference ability possess the single incomparable advantage of large satellite.In order to make up in millimeter wave band transmission process
High loss, satellite will be using the orientation narrow beam that spaceborne phased array antenna generates into interplanetary communication.Draw in a millimeter wave group of stars
The directional transmissions entered can avoid satellite operation bring interference problem in same frequency range significantly, therefore a millimeter wave group of stars can be with
By frequency spectrum share, meet a multiple group of stars, satellite all shares the same frequency range, to alleviate frequency spectrum resource anxiety problem.However it is same
When support multi-satellite communication system introduce new problem again.Since group of stars topology dynamic change and satellite send message tool
There is randomness.It will appear multi-satellite in a group of stars to move under the same sector of a certain satellite, and sent simultaneously to the satellite
The case where message.It will appear multiple overlappings for sending wave beams at satellite receiving at this time, cause to interfere with each other between inter-satellite link
Problem greatly reduces the communication efficiency and network performance of a group of stars, therefore it is required that the satellite in a group of stars has AF panel skill
Art, and due on satellite resource it is limited, the interference mitigation technology having on satellite should also go to implement from the angle of resource management.
In terms of AF panel, at present there has been no the research directly against millimeter wave group of stars scene, and GCS Ground Communication System
The research relative maturity of (scenes such as car networking, D2D, 5G) interference mitigation technology.Only because satellite communication has communication distance
Far, network topology dynamic change and resource and the features such as power limited, so that the technology applied under ground scene is in millimeter
Applicability in wave satellite network is more limited.Bibliography 1 (Cristina Perfecto, Javier Del Ser,
Muhammad Ikram Ashraf,et al.Beamwidth Optimization in Millimeter Wave Small
Cell Networks with Relay Nodes:A Swarm Intelligence Approach.[J]European
Wireless 2016:101-106.) one kind is proposed based on meta-heuristic algorithm optimization beam angle scheme.But program needle
Pair scene be cellular system, compared with the intersatellite communication environment studied of the present invention, the distance between base station relative close,
It is densely distributed, for the satellite of telecommunication, need to accomplish beam angle it is narrower could reduce annoyance level, therefore
It also needs to do further consideration in terms of reasonably selecting beam angle.Bibliography 2 (Ghaith Hattab, Eugene
Visotsky,Mark Cudak,et al.Interference Mitigation via Beam Range Biasing for
5G mmWave Coexistence with Incumbents.[J].IEEE 5G World Forum(5GWF)-Silicon
Valley, CA, USA.2018:210-214.) scheme for base station beam distribution of compensation or bias is proposed, but the program is only
The wave beam biasing for considering base station side does not guarantee user's without reference to improvement of the user side in terms of beam allocation and biasing
Fairness is not directly applicable institute's scene to be applied of the invention.Bibliography 3 (Yu Li, Zufan Zhang, Wei
Wang,et al.Conccurent Transmission Based Stackelberg Game for D2D
Communications in mmWave Networks.[J].IEEE International Conference on
Communications.2017.) from the angle of time domain, it is total to propose a kind of time-domain resource based on this tower Burger game
Enjoy scheme.The program only demonstrates performance of the time-domain resource secret sharing in end-to-end static communication, in network of the invention
The intersatellite communication of topological dynamic change also needs to make further research.
To sum up, for designing the interference mitigation technology being applied under group of stars scene, it is necessary to the characteristics of fully considering satellite, skill
The instantaneity of the computation complexity of art, the validity of the utilization of resources, accuracy and application as a result should all account for range.Cause
This, it is mutually dry to have inter-satellite link due to the randomness that group of stars topology dynamic change and inter-satellite message are sent, between a group of stars
The problem of disturbing, interference mitigation technology are that group of stars communication system needs major issue urgently to be resolved.
Summary of the invention
The present invention receives Intersatellite Link AF panel problem for millimeter wave group of stars multi-beam, proposes a kind of based on wave beam
The AF panel scheme of the wave beam biasing in domain, the program can be in the wave beam forming stages according to the satellite information interfered, will
The wave beam being aligned is biased, and improves wave beam offset angle from the angle of Beam resources management using the genetic algorithm of optimization
The efficiency and accuracy calculated is spent, is asked to receive to interfere present in the inter-satellite link of the group of stars under scene in millimeter wave multi-beam
Topic proposes a kind of effective solution scheme and thinking.
Specifically, the present invention provides a kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave, is used for
Millimeter wave multi-beam receives group of stars communication system under scene.In the group of stars communication system based on millimeter wave, it is located at group of stars center
Primary each fan antenna equipped with multiple wave beams, when multi-satellite moves to the covering of the same sector an of primary
In range, and to the primary send message when, occur wave beam overlapping at primary.The method of the present invention is according to every satellite in a group of stars
Location information, adjust the beam position of satellite so that each beam coverage in only a transmission satellite or reception
Satellite.
The present invention includes the following steps:
Wave beam biasing is executed in the association wave beam forming training A-BFT time slot of beacon interval；
The wave beam biasing is the addition wave beam angle of eccentricity on the beam direction that satellite is currently aligned, and as sends and defends
Star addition sends angle of eccentricity, receives angle of eccentricity to receive satellite addition.
The wave beam angle of eccentricity is obtained so that the achievable rate at group of stars network is maximum by the genetic algorithm of optimization
?.
The genetic algorithm of the optimization, using the achievable rate at group of stars network as fitness function, the individual in population is
It sends the wave beam angle of eccentricity of satellite or receives the wave beam angle of eccentricity of satellite, the individual amount A in population is 2I, and I is a group of stars
The quantity of satellite is sent in network；Repeat genetic algorithm Q times, Q=A；Genetic algorithm of every execution obtain one it is optimal
Population after repeating Q times, obtains Q optimal populations, then therefrom select optimal as a result, as final wave beam angle of eccentricity side
Case.
Genetic algorithm of every execution all includes initialization group, according to fitness selected population, to the individual in population
Intersection and mutation operation are carried out, generates new population, optimal solution refers to the maximum population of the fitness value of acquisition.
The method of the present invention is the interference mitigation technology of the wave beam biasing based on Beam Domain, with the angle of resource management to satellite
Upper limited Beam resources are managed；The best direction of each wave beam is calculated by the genetic algorithm of optimization, realizes that wave beam is inclined
It sets, is interfered with each other between inter-satellite link caused by solving the problems, such as millimeter-wave technology in group of stars mobile communication.The present invention with it is existing
Technology is compared, and is had the advantage that
(1) present invention guarantees each beam coverage for receiving satellite by using wave beam biasing means in Beam Domain
An interior only transmission satellite communicates with, and guarantees to send an only reception satellite in the beam area of satellite and communicates with,
To solve the problems, such as interfering with each other between inter-satellite link；
(2) wave beam biasing means proposed by the present invention are completed within each A-BFT period, have real-time, while being also
The communication of inter-satellite normally and efficiently provides guarantee in the subsequent DTI period；
(3) present invention is so that limited Beam resources are utilized effectively on star, from the angle of resource management in conjunction with excellent
Genetic algorithm after change improves the calculating speed of wave beam bias scheme and the accuracy of result, ensure that the utilization rate of resource.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of beacon interval BI；
Fig. 2 is the model for utilizing wave beam offset communication under one millimeter wave multi-beam scene of the embodiment of the present invention between a group of stars
Figure；
Fig. 3 is the flow diagram that the embodiment of the present invention obtains angle of eccentricity using the genetic algorithm of optimization.
Specific embodiment
The present invention is understood and implemented for the ease of those of ordinary skill in the art, and the present invention is made into one with reference to the accompanying drawing
The detailed and deep description of step.
Millimeter wave multi-beam receive scene under, topology dynamic change present in group of stars communication system and message transmission
Randomness brings the interference problem of inter-satellite link.It receives in order to facilitate millimetre-wave attenuator and multi-beam and melts with group of stars communication system
It closes, the present invention provides a kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave.The method of the present invention is from wave beam
The angle in domain is adjusted the beam position of communicating pair satellite, plays the role of inhibiting interference；In each beacon interval
The wave beam forming stage execute wave beam bias scheme, and guarantee can periodically execute, meet wanting for satellite communication real-time
It asks.Wave beam bias scheme also is realized using the genetic algorithm after optimization in the method for the present invention, to guarantee that Beam resources obtain effectively
It utilizes, shortens the time of operation, improve the accuracy of result.
As shown in Figure 1, transport protocol will transmit for the beacon interval (Beacon Interval, BI) in millimetre-wave attenuator
Time is divided into BI one by one, carries out time slot allocation using it as basic unit, is divided into four seed types by the difference of access rules
Son interval: BTI, A-BFT, ATI and DTI.Millimeter wave multi-beam of the invention receives under scene, BTI (Beacon
Transmission Interval) it is the beacon transmission interval period, satellite hair of the primary into its coverage area within this period
Send beacon frame.A-BFT (Association Beamforming Training, A-BFT) is association wave beam forming cycle of training,
The present invention executes wave beam biasing in the slot cycle.ATI (Announcement Transmission Interval) is logical
Know the transmission intercal period, completes inter-satellite authentication and associated service.DTI (Data Transmission Interval) is several
According to the transmission intercal period, inter-satellite can carry out the interaction of data within this period.
As can be seen from Figure 1 A-BFT is located at before DTI, and wave beam of the invention is biased in A-BFT execution, defends to be subsequent
Communication normally and efficiently between star provides safeguard.Every primary can periodically send BI simultaneously, but also wave beam biasing can week
It executes to phase property, so as to calculate to real-time each according to the change of satellite topology dynamic change bring satellite position
The optimal beam position of wave beam.The BI of 102.4ms is used in the embodiment of the present invention, i.e. wave beam biases every 102.4ms and updates once.
In group of stars communication system, the coverage area for being located at the primary at group of stars center is divided into 36 sectors, each sector
WidthEach fan antenna is equipped with 4 wave beams, the main lobe width θ of each wave beamml=5 °.If the hair of each satellite
It send power identical, and is semiduplex operating mode.Then each wave beam sends or receives gain as unit of decibel dBIt can be indicated by following formula:
Wherein,It indicates to send satellite i and receives hair of the line relative to their own boresight direction between satellite j
It send or received angle of eccentricity, is known as sending offset angle separately below, receives offset angle；T, which is represented, to be sent, and r is represented
It receives.θ-3dBIndicate the angle of half-power beam width, θmlWith θ-3dBRelationship be θml=2.6 θ-3dB。G0For the maximum of antenna
Gain, GslIndicate side lobe gain.Value be target that the genetic algorithm that optimizes of the present invention needs to search.
The maximum gain G of antenna0Calculation formula it is as follows:
Side lobe gain GslCalculation formula it is as follows:
Gsl=-0.4111ln (θ-3dB)-10.579 (3)
Due to the dynamic change of group of stars topology, it may appear that multi-satellite moves to the same sector covering of a certain primary
Situation in range, and the transmission of satellite message has randomness, cannot determine when that having message needs to send, therefore more
The case where satellite sends message to a certain primary simultaneously is existing.If multi-satellite moves to the same of same primary
In sector, and message is sent to the primary simultaneously.Can occur wave beam overlapping at the primary at this time, cause dry between inter-satellite link
It disturbs.Therefore the location information according to satellites all in a group of stars is needed, the beam position of satellite is reasonably adjusted, guarantees each wave beam
An only transmission satellite or reception satellite communicate in coverage area, so that the interference between inter-satellite link effectively be avoided to ask
Topic.
The scene that wave beam bias scheme is introduced in the case where millimeter wave multi-beam receives scene is as shown in Figure 2.MS1 in Fig. 2
Indicate that the center primary of a group of stars 1, CS1, CS2 are the auxiliary star in a group of stars 1, MS2 is the center primary in a group of stars 2.CS1, CS2 and
MS2 is respectively positioned in the same sector coverage of the center primary MS1 in a group of stars 1, and sends message to MS1 simultaneously, and MS1 is received
Message.Indicate that the reception offset angle between CS1 and MS1 is as shown in the figure the line and MS1 between MS1 and CS1
The angle of sight line；Indicate that the transmission offset angle between CS1 and MS1 is as shown in the figure the line between CS1 and MS1
With the angle of the sight line of CS1；Indicate the reception offset angle between CS2 and MS1；It indicates between CS2 and MS1
Send offset angle；Indicate the reception offset angle between MS1 and MS2；Indicate the transmission biasing between MS1 and MS2
Angle.After obtaining wave beam angle of eccentricity, satellite will adjust beam position using angle of eccentricity, and will be pair originally in A-BFT time slot
The quasi- upper wave beam bias of beam position addition, sends satellite or receives satellite so that wave beam is no longer aligned with, to reduce or press down
The existing interference of system.
The received disturbance restraining method of group of stars multi-beam based on millimeter wave of the invention, by the genetic algorithm of optimization,
Angle of eccentricity is calculated, so that group of stars network can achieve maximum achievable rate.
The final purpose for eliminating interference is performance in order to improve group of stars network, therefore will to acquire group of stars network total by the present invention
The maximum achievable rate of the body realization target bright as we, concrete analysis process are as follows:
If C represents the set of auxiliary star (SS),The set of primary (MS) is represented,The set for sending satellite (TS) is represented,The set for receiving satellite (RMS) is represented, whereinThe reception power of satellite jIt can be calculated by following formula:
Wherein,Respectively indicate transmission offset angle, the reception offset angle sent between satellite i and reception satellite j；
k0=(π of λ/4)2For constant, λ is millimetre wavelength, Pi tIt is the transmission power of satellite i,It indicates to receive and be sent under satellite j
The transmission antenna gain of satellite i；It is to send the receiving antenna gain that satellite j is received under satellite i；di,jIndicate satellite i
Transmission range between j,It indicates to send satellite i and receives the path loss of satellite j, n is path loss index, this hair
It is 2 that n is arranged in bright embodiment.
IfC (j) andRespectively indicate the set of TS, SS and MS in the case where receiving satellite j coverage area.It is defending
Jamming power at star jIt calculates as follows:
Wherein,It indicates interference satellite z and receives the offset angle of the receiving direction of satellite j；Indicate interference satellite z with
Receive the offset angle of the sending direction of satellite j；It is the transmission power of satellite z；Indicate the interference satellite z under satellite j
Transmission antenna gain；Indicate the receiving antenna gain that satellite j is received under interference satellite z；Indicate interference satellite z
With the path loss for receiving satellite j.
Interference at satellite j is caused by other auxiliary stars and primary, as shown in formula (6),It is that auxiliary star c makes
At jamming power,It indicates the auxiliary star c of transmission and receives the offset angle of the receiving direction of satellite j,Indicate to send auxiliary star c with
Receive the offset angle of the sending direction of satellite j；It is jamming power caused by primary m,It indicates to send primary m
With receive satellite j receiving direction offset angle,It indicates transmission primary m and receives the offset angle of the sending direction of satellite j.It is the transmission power of satellite c, satellite m respectively；Indicate that the transmission antenna of the auxiliary star c of transmission under satellite j increases
Benefit；Indicate to send the receiving antenna gain that satellite j is received under auxiliary star c；It indicates to send primary m under satellite j
Transmission antenna gain；Indicate to send the receiving antenna gain that satellite j is received under primary m；It indicates to send auxiliary star c
With the path loss for receiving satellite j；It indicates to send primary m and receives the path loss of satellite j.
According to Shannon's theorems it is found that the available signal power and interference that are received in the achievable rate for receiving satellite j by it add
The ratio (SINR) of noise power is calculated, and the SINR calculation formula for receiving satellite j is as follows:
Wherein,For the SINR for receiving satellite j；SetIt indicates in satellite j
The SS and MS of message are sent while place interferes；N0It indicates Gaussian noise power spectral density, takes N0=-174dBm/Hz；BmmW
It indicates channel width, takes BmmW=1200MHz.
Further, it is possible to obtain receiving the achievable rate of satellite jIt is as follows:
Thus the achievable rate of group of stars network entirety is obtainedAre as follows:
In wave beam bias scheme, the relationship of maximum achievable rate and angle of eccentricity that group of stars network can achieve can be by
Following formula indicates:
Wherein,It respectively indicates and sends satellite TS and receive satellite RMS wave beam angle of eccentricity, above formula is wave beam
Bias scheme needs the target realized, angle of eccentricity is the object that genetic algorithm needs to search.Indicate beam angle.N table
Show number of beams.
Formula (10) indicates to seek so that the maximum wave beam for sending satellite and receiving satellite of the achievable rate at group of stars network
Offset angle.Since the resource under satellite communication environment is limited, and to delay sensitive.Therefore it is had to when wave beam bias scheme is realized
Ensure that its computation complexity is low, calculating speed is fast, and the accuracy of calculated result is high, guarantees that computing resource is utilized effectively.Intelligence
Energy algorithm can meet these requirements, especially genetic algorithm well and be very suitable for solving complicated optimization problem, and
It is not limited by conditions of problems, search capability and environmental suitability with very strong globally optimal solution.The present invention passes through optimization
Genetic algorithm solve the problem, obtain angle of eccentricity, the process realized as shown in figure 3, illustrate corresponding below
Realize step.
Step 1, initialization individual.If initially generating S population at random by genetic algorithm, A are included in each population
Body, each individual is the wave beam angle of eccentricity for sending satellite or receiving satellite, is expressed asGroup of individuals
It is expressed asWherein, A=2I, I are setIn number of satellite,It is the set for sending satellite, S is per generation
Scale.
Step 2, the fitness of population is calculated.Using the achievable rate of group of stars network entirety as fitness functionMeter
It calculates as shown in formula (9), obtains the fitness value of each population.Fitness value is bigger, and the individual indicated in population is more excellent.
Step 3, good variety population is selected from contemporary community forms group of new generation, populationSelect probability pa
It may be expressed as:
Wherein, FaIt is exactly populationFitness, FbIt is exactly populationFitness.
If the population quantity retained from contemporary community is N1It is a, it is expressed asSo remaining M=S-N1
Individual in a population will be by the intersection of genetic algorithm and mutation operation generation.
To k-th of individual θ in some population of contemporary communitykWith first of individual θlAt g by crossover operation, obtain
To θkgAnd θlg, it is as follows:
θkg=θkg(1-b)+θlgb (12)
θlg=θlg(1-b)+θkgb (13)
Wherein, θkgIndicate k-th of individual θkG；θlgIndicate first of individual θlG；B is [0,1] section
Random number.New individual is generated by crossover operation, if the population invariable number that crossover operation generates is M1, it is expressed as
To in some population a-th individual g-th of gene θagThe operating method to make a variation are as follows:
Wherein, θmaxIt is gene θagThe upper bound, θminIt is gene θagLower bound, f (u)=r2(1-o/Kmax)2, r be one with
Machine number, o are current iteration number, KmaxIt is maximum evolution number, r is the random number in [0,1] section.It is generated by mutation operation
New individual, if the population invariable number that mutation operation generates is M2, it is expressed asM=M1+M2。
Step 4, it selectsWhat crossover operation obtainedIt is obtained with mutation operationGroup of new generation is collectively constituted, using obtained group of new generation as contemporary community.Judging current algebra k is
The no maximum number of iterations K for being greater than settingmax, if so, stopping iteration, export current optimum populationIt obtains
The just bias angle of each wave beam；Otherwise, continue to go to step 2 execution.
In the method for the present invention, it is Q times total to repeat previous step 1~4, all obtains an optimal solution each time, repeats Q times
Afterwards, Q optimal solution is obtained, is selected again from these optimal solutions optimal as a result, as final wave beam bias scheme.
Genetic algorithm is widely used in as a kind of random device solves complicated optimization problem, and obtains significant knot
Fruit.However, it still has the inherent defect based on random optimization, for example, the local search ability of genetic algorithm is weaker, exist
The risk of certain Premature Convergence.In practical applications, genetic algorithm is run multiple times to the same problem in the hope of preferably solving
It is inevitable.Along this thinking, the present invention optimizes the genetic algorithm of use, in same group of stars networkIt is repeatedly solved, and selects optimal result globally optimal solution the most from multiple results of generation, in the hope of jumping out
The limitation of locally optimal solution, present invention provide that the number Q=A repeatedly solved.
So far, the embodiment of the present invention describe proposed receive under scene in millimeter wave multi-beam, be logical suitable for a group of stars
The disturbance restraining method of letter system, this method guarantee each wave for receiving satellite by proposing wave beam bias scheme in Beam Domain
An only transmission satellite communicates in beam coverage area, guarantees to send an only reception satellite in the beam area of satellite
It communicates with, to solve the problems, such as interfering with each other between inter-satellite link.
Obviously, described embodiment is also only a part of the embodiments of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Claims (3)
1. a kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave, application scenarios are: based on millimeter wave
In group of stars communication system, positioned at group of stars center primary each fan antenna equipped with multiple wave beams, when multi-satellite moves
Into the coverage area of the same sector of a primary, and to the primary send message when, occur wave beam overlapping at primary；
It is characterized in that, the method adjusts the beam position of satellite according to the position of satellites all in a group of stars, so that each wave beam
An only transmission satellite or reception satellite in coverage area；The described method includes:
Wave beam biasing is executed in the association wave beam forming training A-BFT time slot of beacon interval；
The wave beam biasing is the addition wave beam angle of eccentricity on the beam direction that satellite is currently aligned；The wave beam biasing
Angle is obtained so that the achievable rate at group of stars network is maximum by genetic algorithm.
2. the method according to claim 1, wherein the wave beam angle of eccentricity, is calculated by the heredity of optimization
Method obtains；In the genetic algorithm of optimization, using the achievable rate at group of stars network as fitness function, the individual in population is to send
The wave beam angle of eccentricity of satellite or the wave beam angle of eccentricity for receiving satellite, the individual amount A in population is 2I, and I is group of stars network
The middle quantity for sending satellite；Repeat genetic algorithm Q times, Q=A；Genetic algorithm of every execution obtains an optimal population,
After repeating Q times, Q optimal populations are obtained, then therefrom select optimal as a result, as final wave beam angle of eccentricity scheme.
3. a kind of received disturbance restraining method of group of stars multi-beam based on millimeter wave according to claim 1 or 2, special
Sign is that the achievable rate at the group of stars network is to sum to obtain by each achievable rate for receiving satellite, is expressed as follows:
Wherein,For the achievable rate at group of stars network,It represents and receives satellite set,For receive satellite j can
Up to rate,It indicates to send satellite i and receives the transmission offset angle between satellite j,It respectively indicates and sends satellite i and reception
Reception offset angle between satellite j；
So that the achievable rate at group of stars network is maximum, it is expressed as:
Wherein, θmlIndicate the main lobe width of the wave beam of reception satellite,Indicate that the width of the sector of reception satellite, N indicate wave beam
Quantity.
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| CN110932768A (en) * | 2019-10-14 | 2020-03-27 | 中国空间技术研究院 | Polar orbit constellation GEO interference avoidance method based on polar orbit constellation attitude bias |
| WO2021135869A1 (en) * | 2019-12-31 | 2021-07-08 | 大唐移动通信设备有限公司 | Satellite beam offset processing method, device, and medium |
| CN111464221B (en) * | 2020-05-22 | 2022-04-15 | 中南大学 | BFT-based wireless access method and communication method under millimeter wave cellular network |
| CN111464221A (en) * | 2020-05-22 | 2020-07-28 | 中南大学 | BFT-based wireless access method and communication method under millimeter wave cellular network |
| CN115315903A (en) * | 2021-03-05 | 2022-11-08 | 北京小米移动软件有限公司 | Interference processing method and device, communication equipment and storage medium |
| CN115315903B (en) * | 2021-03-05 | 2024-04-09 | 北京小米移动软件有限公司 | Interference processing method and device, communication equipment and storage medium |
| CN113473442A (en) * | 2021-07-05 | 2021-10-01 | 常熟市泓博通讯技术股份有限公司 | Millimeter wave access point roaming system |
| CN113825238A (en) * | 2021-09-03 | 2021-12-21 | 天地信息网络研究院(安徽)有限公司 | Flexible signaling beam multi-scene application method in satellite communication |
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| CN116095123A (en) * | 2023-03-03 | 2023-05-09 | 中国建材检验认证集团湖南有限公司 | Water conservancy monitoring system and method based on Beidou satellite application |
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