CN109004950A - A kind of method and system solving telemetered signal and number communication mutual interference - Google Patents
A kind of method and system solving telemetered signal and number communication mutual interference Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
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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
- H04B7/18502—Airborne stations
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Abstract
The present invention relates to the method and system of a kind of solution telemetered signal and number communication mutual interference, it include: the first telecommand for judging whether to receive ground transmission, if, then judge whether the first telecommand is down-transmitting data signal instruction, if, data transmission terminal and phased array antenna are then opened, is synthesized the number communication number from payload and the telemetered signal from Spread Spectrum TT&C answering machine in digital display circuit, the signal after synthesis is transmitted to ground by phased array antenna by data transmission terminal；If the first telecommand is not down-transmitting data signal instruction, an array element in data transmission terminal and phased array antenna is opened, Spread Spectrum TT&C answering machine telemetered signal is transmitted to ground by the array element opened in digital display circuit.The present invention is synthesized by that will count communication number and telemetered signal, solves the problems, such as to ensure that the continuity and reliability of satellite downlink telemetered signal with the mutual interference for passing number communication number and telemetered signal at present in observing and controlling region.
Description
Technical field
The present invention relates to technical field of satellite communication, more particularly to a kind of solution telemetered signal and count communication mutual interference
Method and system.
Background technique
In current low orbit satellite, X frequency range Spread Spectrum TT&C system and Data transfer system are mostly two independent subsystems, observing and controlling
System includes TT&C Transponder, four port networks and TT&C antenna three parts, and the main telemetering for completing satellite, remote control, tracking are surveyed
The functions such as amount, and Data transfer system includes data transmission terminal and phased array antenna two parts, the main biography down for completing payload data
Function.Since the Spread Spectrum TT&C answering machine telemetered signal sum number communication number of X frequency range is in identical frequency range, and two signals
Frequency point is adjacent, and the bandwidth and intensity of number communication number are much higher than telemetered signal again, so satellite does telemetering simultaneously in observing and controlling region
When task sum number passes task, number communication number can generate interference to telemetered signal, so that the telemetered signal bit error rate that ground receiver arrives
Increase, can not accurately judge the state of satellite.
The existing method for avoiding telemetered signal sum number communication mutual interference can be by increasing X frequency range Spread Spectrum TT&C answering machine
Transmission power reduces number communication number to the signal interference ratio of telemetered signal, and this method is in certain answering machine structure size and weight
Under, thermal design it is larger, and use powerful power amplifier chips, the design inside answering machine can also be changed.In addition, also
Influence to telemetered signal can be reduced by increasing the polarization isolation of TT&C system and Data transfer system, but this method
Data transfer system twin-channel for left-right rotary, lower line number communication rate will reduce half, influence the biography of payload data
Movement Capabilities.
Summary of the invention
Based on this, it is necessary to which for the existing method for avoiding telemetered signal sum number communication mutual interference, there are Spread Spectrum TT&Cs to answer
It is larger to answer machine thermal design difficulty so that Spread Spectrum TT&C answering machine structure is complicated change and influence payload export transmittability
The problem of, the method and system of a kind of solution telemetered signal and number communication mutual interference are provided.
To solve the above problems, the invention adopts the following technical scheme:
A method of solving telemetered signal and number communication mutual interference, comprising the following steps:
Step 1: judge whether to receive the first telecommand of ground transmission, if so, executing step 2；
Step 2: judging whether first telecommand is down-transmitting data signal instruction, if so, execute step 3 and
Step 4；If it is not, thening follow the steps five and step 6；
Step 3: data transmission terminal and phased array antenna are opened；
Step 4: by the number communication number from payload and the telemetering from Spread Spectrum TT&C answering machine in digital display circuit
Signal is synthesized, and the signal after synthesis is transmitted to ground by the phased array antenna, and house keeping computer is total by CAN
Line is connect with the Spread Spectrum TT&C answering machine and the data transmission terminal respectively；
Step 5: an array element in data transmission terminal and phased array antenna is opened；
Step 6: the data transmission terminal will be passed from the telemetered signal of Spread Spectrum TT&C answering machine by the array element opened
Ground is transported to, house keeping computer is connect with the Spread Spectrum TT&C answering machine and the data transmission terminal respectively by CAN bus.
Correspondingly, the present invention also proposes that a kind of number of method based on above-mentioned solution telemetered signal and number communication mutual interference passes
System and Spread Spectrum TT&C system, including left-handed phased array antenna, the first data transmission terminal, dextrorotation phased array antenna, the second data transmission terminal,
First TT&C antenna, the second TT&C antenna, four port networks, the first Spread Spectrum TT&C answering machine and the second Spread Spectrum TT&C answering machine；
First data transmission terminal is connect with the left-handed phased array antenna, second data transmission terminal and the dextrorotation phase
Control array antenna connection；
First TT&C antenna and second TT&C antenna pass through four port network and described first respectively and expand
Frequency TT&C Transponder is connected with the second Spread Spectrum TT&C answering machine；
House keeping computer by CAN bus respectively with first data transmission terminal, second data transmission terminal, described first
Spread Spectrum TT&C answering machine is connected with the second Spread Spectrum TT&C answering machine；
Satellited system receive ground transmission the first telecommand after, judge first telecommand whether be under
Pass data-signal instruction；
If so, the satellited system opens first data transmission terminal, second data transmission terminal, described left-handed phased
Array antenna and the dextrorotation phased array antenna, by the number communication number from payload and from described first in digital display circuit
Spread Spectrum TT&C answering machine, the telemetered signal of the second Spread Spectrum TT&C answering machine are synthesized, first data transmission terminal and institute
It states the second data transmission terminal and passes the signal after synthesis by the left-handed phased array antenna and the dextrorotation phased array antenna respectively
Transport to ground；
If it is not, then the satellited system opens a battle array in first data transmission terminal and the left-handed phased array antenna
The telemetered signal of member, the first Spread Spectrum TT&C answering machine and the second Spread Spectrum TT&C answering machine described in first data transmission terminal is logical
It crosses the array element opened and is transmitted to ground, alternatively, dextrorotation described in satellited system unlatching second data transmission terminal is phased
An array element in array antenna, second data transmission terminal will be from the first Spread Spectrum TT&C answering machines and second spread spectrum
The telemetered signal of TT&C Transponder is transmitted to ground by the array element opened.
In the method and system of a kind of above-mentioned solution telemetered signal and several communication mutual interferences, under Spread Spectrum TT&C answering machine
Row telemetry function is incorporated in data transmission terminal, synthesizes number communication number and telemetered signal in digital display circuit, solves observing and controlling
With the mutual interference problem for passing number communication number and telemetered signal at present in region, ensure that the continuity of satellite downlink telemetered signal with can
By property, to guarantee the reliability of ground receiver telemetry intelligence (TELINT).Meanwhile the present invention is solving telemetered signal and number communication mutual interference
While problem, the working condition of phased array antenna can be reasonably adjusted according to corresponding mission requirements, reduces Spread Spectrum TT&C
The power consumption and size of answering machine, simplify answering machine interface function.
Detailed description of the invention
Fig. 1 is the flow diagram for the method that the present invention solves telemetered signal and number communication mutual interference；
Fig. 2 is the structural schematic diagram of Data transfer system of the present invention and Spread Spectrum TT&C system.
Specific embodiment
Technical solution of the present invention is described in detail below in conjunction with attached drawing and preferred embodiment.
In one of the embodiments, the invention discloses it is a kind of solution telemetered signal and number communication mutual interferences method,
Method includes the following steps:
Step 1 (S1): judging whether to receive the first telecommand of ground transmission, if so, step 2 is executed, if
It is no, then follow the steps five and step 6；
Step 2 (S2): judging whether the first telecommand is down-transmitting data signal instruction, if so, execute step 3 and
Step 4；If it is not, thening follow the steps five and step 6；
Step 3 (S3): data transmission terminal and phased array antenna are opened；
Step 4 (S4): by the number communication number from payload and from Spread Spectrum TT&C answering system in digital display circuit
Telemetered signal synthesized, and the signal after synthesis is transmitted to ground by phased array antenna, house keeping computer passes through CAN
Bus is connect with Spread Spectrum TT&C answering machine and data transmission terminal respectively；
Step 5 (S5): an array element in data transmission terminal and phased array antenna is opened；
Step 6 (S6): the telemetered signal from Spread Spectrum TT&C answering machine is transmitted to by data transmission terminal by the array element opened
Ground, house keeping computer are connect with Spread Spectrum TT&C answering machine and data transmission terminal respectively by CAN bus.
Data transmission terminal plays down the function of passing the number communication number of telemetered signal and payload in the present invention, is specifically divided into
Two kinds of situations are transmitted:
(1) with when passing at present, data transmission terminal receives the telemetry intelligence (TELINT) of CAN bus and to have by oneself telemetered signal sum number communication number
The data for imitating load, synthesize telemetered signal sum number communication number in digital display circuit, the power of control two paths of signals synthesis
Than guaranteeing that number passes link and do not influenced by telemetered signal；Signal after synthesis is issued phased array antenna by data transmission terminal, by phased
Array antenna will be transmitted to ground under signal, after ground receiver to signal, in receiving end by telemetered signal point after filtering and despreading
It separates out and；
(2) when only passing telemetered signal down, data transmission terminal receives the telemetry intelligence (TELINT) in CAN bus, issues phase after modulation
It is passed under control array antenna.In this case, in order to save power consumption, the array element that satellited system can control phased array antenna is opened
State, the link requirement that telemetered signal passes down can be met by only retaining an array element unlatching.
Specifically, as shown in Figure 1, ground determines whether satellite enters observing and controlling region according to the location information of navigation neceiver
It is interior, if it is decided that satellite comes into observing and controlling region, and when ground needs satellite to do several biography tasks, and ground sends the first remote control
It instructs to satellite；If satellite is in observing and controlling region, but ground, without doing several biography tasks, ground is then distant no need to send first
Control instruction is to satellite.
In step 1, satellited system judges whether to receive the first telecommand of ground transmission.In this step, star
It is distant that the engineering parameter that business system can be returned according to Spread Spectrum TT&C answering machine determines whether satellite has received ground is sent first
Control instruction, if satellited system judges that satellite reception to the first telecommand, thens follow the steps two；If satellited system judges satellite
Be not received by the first telecommand, then can according to the location information of navigation neceiver determine satellite whether in observing and controlling region,
The first telecommand for whether receiving ground transmission is rejudged if in observing and controlling region, if not in observing and controlling region
Just without manipulation.
In step 2, satellited system judges whether the first telecommand is down-transmitting data signal instruction.In this step,
Satellited system receives the first telecommand information that Spread Spectrum TT&C answering machine is transmitted by CAN bus, according to the first remote control
The content of command information judges whether the first telecommand is down-transmitting data signal instruction, if down-transmitting data signal instruction, then
Execute step 3 and step 4；If not down-transmitting data signal instruction, thens follow the steps five and step 6.
In step 3, data transmission terminal and phased array antenna are opened.Satellited system sends instructions to data transmission terminal and phased
Array antenna makes it work on power.
In step 4, by from payload data and telemetry intelligence (TELINT) synthesis after under pass.Data transmission terminal receives simultaneously
Telemetered signal in CAN bus and the data from payload, and synthesize two paths of signals in digital display circuit, data transmission terminal
Signal after synthesis is transmitted to phased array antenna, the signal after synthesizing is transmitted to ground by phased array antenna.Wherein, digital display circuit
It refers to the system for completing the operation to digital quantity with digital signal, is a part of circuit in data transmission terminal.
Further, when being synthesized number communication number and telemetered signal in digital display circuit, digital display circuit will control two
The power ratio of road signal synthesizes number communication number and telemetered signal according to predetermined power ratio, to ensure that two paths of signals is passing
Will not influence each other when defeated, solve the problems, such as the mutual interference of two paths of signals, wherein predetermined power than for number communications number power with it is distant
Survey the power ratio of signal.Preferably, predetermined power ratio can be 18dB.
In step 5, an array element in data transmission terminal and phased array antenna is opened.When only passing telemetered signal down, star
Business system opens data transmission terminal, and data transmission terminal receives telemetered signal in CAN bus, issued after modulation phased array antenna into
It is passed under row.In this case, in order to save power consumption, satellited system can control the array element open state of phased array antenna, only protect
Stay an array element unlatching that can meet the link requirement that telemetered signal passes down.Phased array antenna has multiple array elements, is only passing down
One of array element can be opened when telemetered signal to work.
In step 6, it will be passed under telemetered signal, passed through the telemetered signal from CAN bus in digital display circuit
Array element in the phased array antenna of unlatching is transmitted to ground.
Further, in this embodiment data transmission terminal and the working frequency range of Spread Spectrum TT&C answering machine be X frequency range.This hair
Bright technical solution rationally, be easily achieved, adapt to answering for low orbit satellite X frequency range Spread Spectrum TT&C system and X frequency range Data transfer system
Use demand.
The method of a kind of solution telemetered signal that the present embodiment is proposed and number communication mutual interference has the advantages that
(1) the downlink telemetry function of Spread Spectrum TT&C answering machine is incorporated in data transmission terminal, by number communication number in digital display circuit
It is synthesized with telemetered signal, solves the problems, such as to guarantee in observing and controlling region with the mutual interference for passing number communication number and telemetered signal at present
The continuity and reliability of satellite downlink telemetered signal；
(2) synthesis of telemetered signal sum number communication number is realized in digital display circuit, and the power ratio of two paths of signals can control
It is very accurate, and do not influenced by hardware；
(3) data transmission terminal pertains only to the change on software, and Spread Spectrum TT&C answering machine can directly remove the correlation of transmitter
Device and function reduce power consumption, the volume and weight of Spread Spectrum TT&C answering machine；
(4) satellite can according to task situation, the open state of autonomous control data transmission terminal and phased array antenna array element,
Under the premise of guaranteeing downlink telemetry function, power consumption is reduced.
As a kind of specific embodiment, as shown in Figure 1, the signal after synthesis is passed through phased array antenna in step 4
Be transmitted to ground and step 6 by the telemetered signal from CAN bus by open array element be transmitted to ground after, further include
Following steps:
Step 7 (S7): receiving the second telecommand that ground is sent, and the second telecommand is that stopping number passing and telemetering refers to
It enables.Ground can send the second telecommand of uplink according to satellite position information before satellite leaves observing and controlling region, i.e. stopping number passing
And telemetry command, corresponding operating is made by satellited system after satellite reception to the second telecommand, i.e. execution step 8.
Step 8 (S8): data transmission terminal and phased array antenna are closed.Satellited system sends instruction, closes the number to work
Transmission terminal and phased array antenna stop passing number biography data or telemetry down.After satellite leaves observing and controlling region, data transmission terminal and
Phased array antenna power-off, but Spread Spectrum TT&C answering machine is in open state.
In another embodiment, invention additionally discloses a kind of based on above-mentioned solution telemetered signal and counts communication mutual interference
The Data transfer system and Spread Spectrum TT&C system of method, the Data transfer system and Spread Spectrum TT&C system include left-handed phased array antenna 1, first
Data transmission terminal 2, dextrorotation phased array antenna 3, the second data transmission terminal 4, the first TT&C antenna 5, the second TT&C antenna 6, four port nets
Network 7, the first Spread Spectrum TT&C answering machine 8 and the second Spread Spectrum TT&C answering machine 9.
Specifically, as shown in Fig. 2, the first data transmission terminal 2 is connect with left-handed phased array antenna 1, the second data transmission terminal 4 and the right side
Phased array antenna 3 is revolved to connect；First TT&C antenna 5 and the second TT&C antenna 6 are surveyed by four port networks 7 and the first spread spectrum respectively
Control answering machine 8 and the connection of the second Spread Spectrum TT&C answering machine 9；House keeping computer 10 by CAN bus respectively with the first data transmission terminal
2, the second data transmission terminal 4, the first Spread Spectrum TT&C answering machine 8 and the connection of the second Spread Spectrum TT&C answering machine 9.
Satellited system receive ground transmission the first telecommand after, judge the first telecommand whether be under pass number
Corresponding operation is executed according to signal instruction, and according to judging result, concrete operations are as follows:
If satellited system judges that the first telecommand is down-transmitting data signal instruction, satellited system will open the first number and pass
Terminal 2, the second data transmission terminal 4, left-handed phased array antenna 1 and dextrorotation phased array antenna 3, will be from effectively load in digital display circuit
The number communication number of lotus 11 and telemetered signal from the first Spread Spectrum TT&C answering machine 8, the second Spread Spectrum TT&C answering machine 9 are closed
The signal after synthesis is passed through into left-handed phased array antenna 1 and dextrorotation phase respectively at, the first data transmission terminal 2 and the second data transmission terminal 4
Control array antenna 3 is transmitted to ground；
If it is down-transmitting data signal instruction that satellited system, which judges the first telecommand not, satellited system opens the first number
An array element in transmission terminal 2 and left-handed phased array antenna 1, the first data transmission terminal 2 will come from 8 He of the first Spread Spectrum TT&C answering machine
The telemetered signal of second Spread Spectrum TT&C answering machine 9 is transmitted to ground by the array element opened in left-handed phased array antenna 1, alternatively,
Satellited system opens an array element in the second data transmission terminal 4 and dextrorotation phased array antenna 3, and the second data transmission terminal 4 will be from the
The telemetered signal of one Spread Spectrum TT&C answering machine 8 and the second Spread Spectrum TT&C answering machine 9 passes through the battle array opened in dextrorotation phased array antenna 3
Member is transmitted to ground.
In the present embodiment, the first Spread Spectrum TT&C answering machine 8 and the second Spread Spectrum TT&C answering machine 9 are the passes mutually backed up
System, the first data transmission terminal 2 and the second data transmission terminal 4 are all received answers from the first Spread Spectrum TT&C answering machine 8 and the second Spread Spectrum TT&C
The telemetered signal of machine 9 is answered, the first data transmission terminal 2 synthesizes number communication number and telemetered signal in digital display circuit, and passes through
It being passed under left-handed phased array antenna 1, the second data transmission terminal 4 synthesizes number communication number and telemetered signal in digital display circuit, and
By passing under dextrorotation phased array antenna 3, number passes antenna and data transmission terminal is that correspondingly, the first data transmission terminal 2 corresponds to a left side
Phased array antenna 1 is revolved, the second data transmission terminal 4 corresponds to dextrorotation phased array antenna 3.
In the Data transfer system and Spread Spectrum TT&C system of the present embodiment, Spread Spectrum TT&C answering machine eliminates emission function, only
Remain receive capabilities.In protosatellite system, the remote control of observing and controlling and telemetry pass through CAN bus and are communicated, and number passes
Terminal is also hung in same CAN bus, mainly reception bus command frame and broadcast frame, return engineering parameter frame, and this reality
After the observing and controlling cancellation telemetry function for applying example, telemetry intelligence (TELINT) can pass to data transmission terminal by CAN bus, and data transmission terminal is in number
Telemetered signal sum number communication number is synthesized in system, the signal after synthesis is then passed to by ground by phased array antenna.
The implementation method of each its concrete function of device, is referred to above-mentioned solution in Data transfer system of the present invention and spread spectrum telemetry system
Implementation method described in the embodiment of the method for telemetered signal and number communication mutual interference, details are not described herein again.
As a kind of specific embodiment, after the second telecommand that satellited system receives ground transmission, second
Telecommand is to stop number passing and telemetry command, satellited system close the first data transmission terminal 2 and/or the second data transmission terminal 4 and
The left-handed phased array antenna 1 and/or dextrorotation phased array antenna 3 to work.Satellited system sends instruction, what closing was working
Data transmission terminal and phased array antenna, when the first data transmission terminal 2 and the same biography telemetered signal sum number communication number at present of the second data transmission terminal 4
When, satellited system closes the first data transmission terminal 2, the second data transmission terminal 4 and the left-handed phased array antenna 1 to work, dextrorotation phase
Control array antenna 3；When the first data transmission terminal 2 or the second data transmission terminal 4 only pass telemetered signal down, satellited system closes the first number
Transmission terminal 2 or the second data transmission terminal 4 and the array element to work are closed simultaneously when satellited system closes the first data transmission terminal 2
The array element in left-handed phased array antenna 1 is closed, when satellited system closes the second data transmission terminal 4, simultaneously closes off dextrorotation phased array day
Array element in line 3.After satellited system closes data transmission terminal and phased array antenna, data transmission terminal stops passing number biography data or telemetering number down
According to.After satellite leaves observing and controlling region, data transmission terminal and phased array antenna power-off, but Spread Spectrum TT&C answering machine is in open state.
Further, in this embodiment when being synthesized number communication number and telemetered signal in digital display circuit, number system
System will control the power ratio of two paths of signals, be synthesized number communication number and telemetered signal according to predetermined power ratio, to ensure two
Road signal will not influence each other in transmission, solve the problems, such as the mutual interference of two paths of signals, and wherein predetermined power ratio is number communication number
Power and telemetered signal power ratio.Preferably, predetermined power ratio can be 18dB.
Further, in this embodiment the first data transmission terminal 2, the second data transmission terminal 4, the first Spread Spectrum TT&C answering machine 8
Working frequency range with the second Spread Spectrum TT&C answering machine 9 is X frequency range.Technical solution of the present invention is reasonable, is easily achieved, and adapts to
Low orbit satellite X frequency range Spread Spectrum TT&C system and X band number pass systematic difference demand.
Below by taking X frequency range Data transfer system and X frequency range Spread Spectrum TT&C system as an example, technical solution of the present invention is carried out detailed
Explanation.For X frequency range, the frequency point of Spread Spectrum TT&C system and Data transfer system is adjacent (200MH or so), Spread Spectrum TT&C answering machine
Frequency point in the bandwidth of several communications number.In original system, Spread Spectrum TT&C answering machine downlink uses right-handed circular polarization mode, phased
Array antenna uses dextrorotation and left-hand circular polarization two ways.Table 1 lists satellite when not taking method of the invention, downlink
The link margin of telemetered signal sum number communication number, phased array antenna is analyzed in a manner of right-handed circular polarization here.It can from table
To find out, according to the index of original system, the link margin of number communication number is met the requirements, and telemetered signal link is mainly by several communications number
Influence, link margin be -4.5dB, cannot meet the requirements.
1 original system downlink analysis table of table
| Title | Unit | Number passes | Telemetering |
| Working frequency | GHz | X frequency range | X frequency range |
| With interior interfering signal power | dBW | -157.07 | -165.67 |
| Signal interference ratio S/J | dB | 35 | 8.6 |
| Link margin | dB | 8.65 | -4.5 |
Data transfer system designed by the method according to the invention and Spread Spectrum TT&C system eliminate the hair of Spread Spectrum TT&C system
Function is penetrated, receive capabilities are only retained.In the present invention, the synthesis of telemetered signal and number communication number is realized in digital display circuit, two
The power ratio of road signal can control very accurate, and not influenced by hardware.When two signals are synthesized, Ke Yixuan
Selecting number and passing signal power and telemetered signal power ratio is 18dB, and under the power ratio, number passes link not to be influenced by observing and controlling.For surveying
Link is controlled, according to the power ratio of 18dB, if it is 5dBm that the number of data transmission terminal output, which passes total power signal, the telemetering letter exported
Number general power is -13dBm.Number pass power spectrum densities be -80.74dBm/Hz, telemetered signal power spectral density be -
80.88dBm/Hz, therefore telemetered signal is submerged in several communications number or less.Signal after two routing data transmission terminal synthesis passes to phase
Array antenna is controlled, signal is passed to ground by phased array antenna.In ground observing and controlling receiving end, receiving end is after filtering and despreading
Signal interference ratio is 25.6dB, can satisfy link requirements.
Table 2 lists after taking method of the invention, the link margin of downlink telemetry signal sum number communication number, this mileage
Communication number is analyzed with dextrorotation.
The system down link analytical table after applying the present invention of table 2
It can analyze out from table 2, after method of the invention, downlink telemetry signal sum number communication number has sufficient
Link margin, it was demonstrated that several communications number are carried out in observing and controlling region using method of the invention and while telemetered signal transmission be can
With realization.
In the present invention, satellite only has under telemetered signal when passing in observing and controlling region, and satellited system can control phased array antenna
The unlatching quantity of array element keeps the unlatching of a phased array antenna array element to be just able to satisfy the link margin requirement of telemetered signal.It is logical
Calculating analysis is crossed, when passing under only telemetered signal, the link margin of telemetered signal is 22.29dB, and surplus is sufficient, and satisfaction is wanted
It asks, it was demonstrated that method of the invention is when only doing telemetering task, it is ensured that the reliability of downlink telemetry signal.
In conclusion the present invention has the characteristics that have the advantages of simple structure and easy realization, and has very strong versatility, it can be extensive
In the satellite model for solving the problems, such as various X band numbers biographies and X frequency range TT&C Transponder mutual interference.The research of this field and
Designer can carry out various changes and change in design to solution telemetered signal of the invention and the method for counting communication mutual interference
Change without departing from essential scope of the invention.In this way, if these modifications and changes of the invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to encompass including these modifications and changes.
Each technical characteristic of the upper embodiment can be combined arbitrarily, for simplicity of description, not to above-mentioned implementation
The all possible combination of each technical characteristic in example is all described, as long as however, the combination of these technical characteristics is not present
Contradiction all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of method for solving telemetered signal and number communication mutual interference, which comprises the following steps:
Step 1: judge whether to receive the first telecommand of ground transmission, if so, executing step 2；
Step 2: judging whether first telecommand is down-transmitting data signal instruction, if so, executing step 3 and step
Four；If it is not, thening follow the steps five and step 6；
Step 3: data transmission terminal and phased array antenna are opened；
Step 4: by the number communication number from payload and the telemetered signal from Spread Spectrum TT&C answering machine in digital display circuit
It is synthesized, and the signal after synthesis is transmitted to ground by the phased array antenna, house keeping computer passes through CAN bus point
It is not connect with the Spread Spectrum TT&C answering machine and the data transmission terminal；
Step 5: an array element in data transmission terminal and phased array antenna is opened；
Step 6: the telemetered signal from Spread Spectrum TT&C answering machine is transmitted to by the data transmission terminal by the array element opened
Ground, house keeping computer are connect with the Spread Spectrum TT&C answering machine and the data transmission terminal respectively by CAN bus.
2. a kind of method for solving telemetered signal and number communication mutual interference according to claim 1, which is characterized in that in step
Rapid four and step 6 after, it is further comprising the steps of:
Step 7: receiving the second telecommand that ground is sent, and second telecommand is to stop number biography and telemetry command；
Step 8: the data transmission terminal and the phased array antenna are closed.
3. a kind of method for solving telemetered signal and number communication mutual interference according to claim 1 or 2, which is characterized in that
Several communications number and the telemetered signal are synthesized according to predetermined power ratio in the digital display circuit, it is described pre-
If power ratio is the power of several communications number and the power ratio of the telemetered signal.
4. a kind of method for solving telemetered signal and number communication mutual interference according to claim 3, which is characterized in that
The predetermined power ratio is 18dB.
5. a kind of method for solving telemetered signal and number communication mutual interference according to claim 1 or 2, which is characterized in that
The data transmission terminal and the working frequency range of the Spread Spectrum TT&C answering machine are X frequency range.
6. a kind of method of solution telemetered signal based on as described in claim 1 to 5 any one and number communication mutual interference
Data transfer system and Spread Spectrum TT&C system, which is characterized in that including left-handed phased array antenna (1), the first data transmission terminal (2), dextrorotation
Phased array antenna (3), the second data transmission terminal (4), the first TT&C antenna (5), the second TT&C antenna (6), four port networks (7),
First Spread Spectrum TT&C answering machine (8) and the second Spread Spectrum TT&C answering machine (9)；
First data transmission terminal (2) connect with the left-handed phased array antenna (1), second data transmission terminal (4) with it is described
Dextrorotation phased array antenna (3) connection；
First TT&C antenna (5) and second TT&C antenna (6) pass through four port network (7) and described the respectively
One Spread Spectrum TT&C answering machine (8) and the second Spread Spectrum TT&C answering machine (9) connection；
House keeping computer (10) by CAN bus respectively with first data transmission terminal (2), second data transmission terminal (4), institute
State the first Spread Spectrum TT&C answering machine (8) and the second Spread Spectrum TT&C answering machine (9) connection；
Satellited system receive ground transmission the first telecommand after, judge first telecommand whether be under pass number
According to signal instruction；
If so, the satellited system opens first data transmission terminal (2), second data transmission terminal (4), the left-handed phase
Control array antenna (1) and the dextrorotation phased array antenna (3), in digital display circuit by from payload (11) number communication number with
Telemetered signal from the first Spread Spectrum TT&C answering machine (8), the second Spread Spectrum TT&C answering machine (9) is synthesized, institute
The first data transmission terminal (2) and second data transmission terminal (4) are stated by the signal after synthesis respectively by the left-handed phased array day
Line (1) and the dextrorotation phased array antenna (3) are transmitted to ground；
If it is not, then the satellited system opens one in first data transmission terminal (2) and the left-handed phased array antenna (1)
Array element, a data transmission terminal (2) will come from the first Spread Spectrum TT&C answering machine (8) and the second Spread Spectrum TT&C answering machine
(9) telemetered signal is transmitted to ground by the array element opened, and passes eventually alternatively, the satellited system opens second number
An array element in (4) and the dextrorotation phased array antenna (3) is held, second data transmission terminal (4) will expand from described first
The telemetered signal of frequency TT&C Transponder (8) and the second Spread Spectrum TT&C answering machine (9) is transmitted to by the array element opened
Ground.
7. Data transfer system according to claim 6 and Spread Spectrum TT&C system, which is characterized in that
The satellited system receive ground transmission the second telecommand after, second telecommand be stop number pass and
Telemetry command, the satellited system close first data transmission terminal (2) and/or second data transmission terminal (4) and
The left-handed phased array antenna (1) of work and/or the dextrorotation phased array antenna (3).
8. Data transfer system according to claim 6 or 7 and Spread Spectrum TT&C system, which is characterized in that
First data transmission terminal (2) or second data transmission terminal (3) are in the digital display circuit according to predetermined power ratio
Several communications number and the telemetered signal are synthesized, the predetermined power than for several communications number power with it is described
The power ratio of telemetered signal.
9. Data transfer system according to claim 8 and Spread Spectrum TT&C system, which is characterized in that
The predetermined power ratio is 18dB.
10. Data transfer system according to claim 6 or 7 and Spread Spectrum TT&C system, which is characterized in that
First data transmission terminal (2), second data transmission terminal (4), the first Spread Spectrum TT&C answering machine (8) and described
The working frequency range of two Spread Spectrum TT&C answering machines (9) is X frequency range.
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| CN201810896379.7A CN109004950B (en) | 2018-08-08 | 2018-08-08 | Data transmission system and spread spectrum measurement and control system for solving mutual interference of telemetering signals and data transmission signals |
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| CN113179117A (en) * | 2021-04-20 | 2021-07-27 | 长光卫星技术有限公司 | High speed data transmission system for satellite |
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| CN106559128A (en) * | 2016-10-14 | 2017-04-05 | 上海微小卫星工程中心 | For the integrated communication device and method of microsatellite |
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| CN202632091U (en) * | 2012-03-26 | 2012-12-26 | 航天东方红卫星有限公司 | Three-satellite constellation distributed parallel test system |
| CN105894773A (en) * | 2016-04-20 | 2016-08-24 | 上海微小卫星工程中心 | Method and system for satellite telemetry speed increasing and load data fusion |
| CN106559128A (en) * | 2016-10-14 | 2017-04-05 | 上海微小卫星工程中心 | For the integrated communication device and method of microsatellite |
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