CN107682073A - The communication means of spacecraft and target device out of my cabin - Google Patents
The communication means of spacecraft and target device out of my cabin Download PDFInfo
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- CN107682073A CN107682073A CN201710939129.2A CN201710939129A CN107682073A CN 107682073 A CN107682073 A CN 107682073A CN 201710939129 A CN201710939129 A CN 201710939129A CN 107682073 A CN107682073 A CN 107682073A
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- spacecraft
- target device
- signal
- chip
- thresholding
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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
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
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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
- H04B1/7073—Synchronisation aspects
- H04B1/70735—Code identification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
Abstract
The present invention relates to the communication means of a kind of spacecraft and target device out of my cabin, including：S1. the multichannel communication multiple telecommunication antenna of spacecraft sends forward signal chip to the target device out of my cabin of the spacecraft respectively with predetermined time interval；S2. the target device receives the forward signal chip, and the target device by the peak value of the forward signal chip compared with thresholding；S3. the target device each road communication antenna is launched and peak value reach the forward signal chip combination of thresholding, and based on amalgamation result generation assessment signal chip, sent to the spacecraft；S4. the spacecraft receives the assessment signal chip, and returns to confirmation to the target device, is communicated to connect so that the target device is established with the spacecraft.Multichannel communication multiple telecommunication antenna is equally spaced on the bulkhead of spacecraft, be advantageous in the range of 360 ° of spacecraft can receiving and transmitting signal, improve whole coverings of communication range between spacecraft and target device out of my cabin.
Description
Technical field
The present invention relates to a kind of communication means, more particularly to the communication means of a kind of spacecraft and target device out of my cabin.
Background technology
With flourishing for manned space flight task, extravehicular activity turns into the characteristic of manned space flight task.Go out cabin communication to make
For the support technology of extravehicular activity, it is responsible for completing two-way logical in real time between the spacefarer of progress extravehicular activity and manned spacecraft
The data such as letter, transmission voice, control instruction and physiological telemetry.Extension and manned spacecraft scale with extravehicular activity scope
Increase, go out the problems such as cabin communication faces multi-path jamming, communication " dead angle ", the communication quality of cabin communication is reduced out, to being gone out
The spacefarer of cabin activity brings the potential safety hazard of " lost contact ".
For example, Authorization Notice No. is CN103336285B, entitled " circuit of detection of false satellite navigation signals, method
And satellite navigation receiving equipment " patent of invention disclose a kind of scheme.Wherein, the circuit includes the despread unit reconciliation of series connection
Unit is adjusted, the phase discriminator connecting detection device in the carrier tracking loop of demodulating unit, the detector includes the frequency domain conversion of series connection
Circuit, characteristic quantity calculates circuit and detection decision circuit.The detector carries out frequency-domain analysis to the output signal of phase discriminator, calculates
Characteristic quantity, then relatively recognize whether false satellite navigation signal with pre-determined threshold.Due to taking characteristic quantity in this programme
Method compared with thresholding can only judge that satellite-signal whether there is false information, it is impossible to meet spacecraft in space and week
Enclose the needs that stabilized communication link is established between target device.
The content of the invention
It is an object of the invention to provide the communication means of a kind of spacecraft and target device out of my cabin, solves spacecraft in cabin
Between outer target device the problem of communication quality difference.
For achieving the above object, the present invention provides the communication means of a kind of spacecraft and target device out of my cabin, including：
S1. the multichannel communication multiple telecommunication antenna of spacecraft with predetermined time interval respectively to the target device out of my cabin of the spacecraft
Send forward signal chip；
S2. the target device receives the forward signal chip, and the target device is by the forward signal code
The peak value of piece is compared with thresholding；
S3. the target device each road communication antenna is launched and peak value reach thresholding the forward signal chip close
And and based on amalgamation result generation assessment signal chip, to the spacecraft send；
S4. the spacecraft receives the assessment signal chip, and returns to confirmation to the target device, so that institute
State target device and establish communication connection with the spacecraft.
According to an aspect of the present invention, the target device receives the forward signal chip, and the target is set
The step of standby peak value by the forward signal chip is compared with thresholding includes：
S21. the target device passes through by bit by the forward signal chip of each road communication antenna received transmission
Peak value compared with the thresholding, with obtain first be more than thresholding peak value；
S22. the forward direction of the peak value with being more than thresholding with first is obtained based on first peak value more than thresholding
Peak value in the adjacent one or more forward signal chips of signal chip；
S23. the peak value in the forward signal chip sent to each road communication antenna is compared with the thresholding.
According to an aspect of the present invention, the target device each road communication antenna is launched and peak value reach thresholding
The forward signal chip combination, and based on amalgamation result generation assessment signal chip, in the step of being sent to the spacecraft
Including：
S31. the target device carries out CRC check to the forward signal chip after merging；
S32. according to CRC check result, the assessment signal chip of the target device generation with spreading code, to the boat
Its device is sent；The assessment signal chip includes the first ack signal or the first NACK signal, wherein, the first ack signal represents
CRC check result is correct, and it is normal to represent current ink, and the first NACK signal represents CRC check result mistake, represents current ink
Mistake, the spreading code are used to identify the target device.
According to an aspect of the present invention, the target device generation assessment signal chip, sends to the spacecraft
Step includes：
When the target device sends first ack signal, between the spacecraft and the target device out of my cabin
Forward link is normal；
When the target device sends first NACK signal, and the first NACK letters that the target device is sent
Number number is less than the thresholding set in the spacecraft, the forward link mistake between the spacecraft and the target device；
When the target device sends first NACK signal, and the first NACK letters that the target device is sent
Number number is more than the thresholding set in the spacecraft, re-executes step S1-S3.
According to an aspect of the present invention, the spacecraft receives the assessment signal chip, and to the target device
Confirmation is returned, is included so that the target device establishes the step of communicating to connect with the spacecraft,
S41. the spacecraft receives the assessment signal chip by communication antenna described in multichannel and merged；
S42. the spacecraft verifies to the assessment signal chip after merging, and according to check results to described
Target device sends confirmation.
According to an aspect of the present invention, the spacecraft receives the assessment signal code by communication antenna described in multichannel
Piece and the step of merge in, including：
S411. the spacecraft by the peak value of assessment signal chip that by bit receives each road communication antenna with
The thresholding set in the spacecraft is compared, to obtain the peak value more than thresholding；
S412. it is reverse same based on what is stored in the spreading code in the assessment signal chip and the spacecraft
Code is walked, the assessment signal chip for having the peak value more than the thresholding in each road communication antenna is matched, wherein, it is described
Spreading code corresponds with the reverse sync code；
S413. the assessment signal chip combination that the spacecraft will match.
According to an aspect of the present invention, the spacecraft verifies to the assessment signal chip after merging, and
The step of sending confirmation to the target device according to check results includes：
S421. the spacecraft carries out CRC check to the assessment signal chip after merging；
S422. according to CRC check result, the spacecraft generates confirmation, and is sent to the target device；It is described
Confirmation includes the second ack signal or the second NACK signal, wherein, the second ack signal represents that CRC check result is correct, generation
Table current ink is normal, and the second NACK signal represents CRC check result mistake, represents current link error.
According to an aspect of the present invention, spacecraft generation confirmation, and to the step that the target device is sent
Also include in rapid：
When the spacecraft sends the second ack signal, the return link between the target device and the spacecraft is just
Often；
When the number of the spacecraft the second NACK signal of transmission, and the spacecraft the second NACK signal of transmission is less than institute
The thresholding set in target device is stated, the return link mistake between the target device and the spacecraft；
When the number of the spacecraft the second NACK signal of transmission, and the spacecraft the second NACK signal of transmission is more than institute
The thresholding set in target device is stated, re-executes step S4.
According to an aspect of the present invention, communicated between the spacecraft and the target device and use full duplex mode,
And full duplex mode uses frequency division duplex mode；
Communication system between the spacecraft and the target device uses direct sequency-code division multiple access mode.
According to an aspect of the present invention, the predetermined time interval is that adjacent two-way communication antenna sends the forward direction letter
The chip delay differed between number plate.
According to the scheme of the present invention, by being equally spaced multichannel communication multiple telecommunication antenna on the bulkhead of spacecraft, have
Can send and receive signal beneficial in the range of 360 ° of spacecraft, so as to effectively increase spacecraft with out of my cabin
Whole coverings of communication range between target device.By above-mentioned setting, target device and spacecraft out of my cabin is efficiently solved
Between existing for communication link " dead angle ", the coverage that is sent and received signal by improving communication antenna on spacecraft carries
High communication quality between target device and spacecraft, the peace of " lost contact " is further solved between target device and spacecraft
Full hidden danger.Meanwhile using transmit-receive sharing communication antenna also further avoid the single receiving and transmitting signal of communication antenna function can not
Comprehensively the problem of covering spacecraft surrounding space.
According to the scheme of the present invention, set by the connection of forward link between above-mentioned spacecraft and target device,
Spacecraft can send forward signal (i.e. forward signal chip) by being looped around the communication antenna on its bulkhead to surrounding, will navigate
Space covering around its device, avoid producing " dead angle " of signal transmitting, avoid to produce between target device and spacecraft and " lose
The situation of connection ".Spacecraft by equal time distances stagger the time send signal, improve target device reception signal efficiency and
Quality, while also in time analysis can be carried out to the signal of reception successively for target device and reserve the time.By above-mentioned setting,
Target device is merged by the way that peak value to be reached to the signal of thresholding, and multichannel communication multiple telecommunication can be received simultaneously by further ensuring target device
The signal sent, the stability of target device reception signal is improved, so as to solve spacecraft and target device communication link
Between multipath effect, i.e., the signal sent by receiving the communication antenna of diverse location, avoid signal transmission " dead angle ".
Meanwhile according to the present invention also further such that the scope of activities of the target device outside spacecraft module is expanded, avoid due to
Target device caused by " lost contact " problem can not be a wide range of movable the drawbacks of.
According to the scheme of the present invention, set by the connection of return link between above-mentioned target device and spacecraft,
Spacecraft can receive the back signal of surrounding by the communication antenna being looped around on its bulkhead, avoid around spacecraft Stall
Back signal in space, avoid producing " dead angle " that signal receives, avoid to produce between target device and spacecraft and " lose
The situation of connection ".Spacecraft is only chosen and merged to the back signal (i.e. assessment signal chip) that reaches thresholding, avoids pair
Less than the processing of the back signal of thresholding, the efficiency that spacecraft launching site receives signal transacting is improved, saves time and spacecraft
In signal processing unit resource.By above-mentioned setting, spacecraft is merged by the way that peak value to be reached to the signal of thresholding, further
It ensure that spacecraft by multichannel communication multiple telecommunication antenna while can receive the signal that target device sends, improve spacecraft and receive letter
Number stability, so as to solve the multipath effect between spacecraft and target device communication link, i.e., target device is positioned at boat
The diverse location of its device out of my cabin, the back signal that target device is sent can be received by communication antenna, avoid signal transmission
" dead angle ".Meanwhile avoided according to the present invention also further such that the scope of activities of the target device outside spacecraft module is expanded
Because target device caused by " lost contact " problem can not be a wide range of movable the drawbacks of.
Brief description of the drawings
Fig. 1 schematically shows the step block diagram of the communication means according to the present invention；
Fig. 2 schematically shows the cloth of the communication antenna of spacecraft in the communication means according to one embodiment of the present invention
Put structure chart；
Fig. 3 schematically shows the flow chart of the communication means according to one embodiment of the present invention；
Fig. 4 schematically shows the stream of the forward signal chip combination according to the communication means of one embodiment of the present invention
Cheng Tu；
Fig. 5 schematically shows the stream of the assessment signal chip combination according to the communication means of one embodiment of the present invention
Cheng Tu.
Embodiment
, below will be to embodiment in order to illustrate more clearly of embodiment of the present invention or technical scheme of the prior art
In the required accompanying drawing used be briefly described.It should be evident that drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skills, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
When being described for embodiments of the present invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", " preceding ",
" rear ", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", the orientation expressed by " outer " or position relationship are to be based on phase
Orientation shown in the drawings or position relationship are closed, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore above-mentioned term can not
It is interpreted as limitation of the present invention.
The present invention is described in detail with reference to the accompanying drawings and detailed description, embodiment can not go to live in the household of one's in-laws on getting married one by one herein
State, but therefore embodiments of the present invention are not defined in implementation below.
As shown in figure 1, according to the communication means of a kind of spacecraft of the present invention and target device out of my cabin, including：
S1. the multichannel communication multiple telecommunication antenna of spacecraft with predetermined time interval respectively to the target device out of my cabin of the spacecraft
Send forward signal chip；
S2. the target device receives the forward signal chip, and the target device is by the forward signal code
The peak value of piece is compared with thresholding；
S3. the target device each road communication antenna is launched and peak value reach thresholding the forward signal chip close
And and based on amalgamation result generation assessment signal chip, to the spacecraft send；
S4. the spacecraft receives the assessment signal chip, and returns to confirmation to the target device, so that institute
State target device and establish communication connection with the spacecraft.
As shown in Fig. 2 according to one embodiment of the present invention, multichannel communication multiple telecommunication antenna is provided with spacecraft A bulkhead.
In the present embodiment, the communication antenna on spacecraft A bulkheads has k (k >=1) road, and it is first to take communication antenna all the way therein
Communication antenna B1, according to being counterclockwise followed successively by the second communication antenna B2..., kth communication antenna Bk.In this embodiment party
In formula, the interval between each road communication antenna is equal, i.e. k roads communication antenna surround spacecraft A mono- week, and adjacent two-way
The angle of angle C between communication antenna is 360 °/k.In the present embodiment, each road communication antenna is connected by high frequency cable
It is connected to and goes out cabin communication processor inside spacecraft A, and each road communication antenna can realizes transmit-receive sharing.By navigating
Multichannel communication multiple telecommunication antenna is equally spaced on its device A bulkhead, is advantageous to send out in the range of 360 ° around spacecraft A
Send and reception signal, covered so as to effectively increase the whole of communication range between spacecraft A and target device D out of my cabin.It is logical
Above-mentioned setting is crossed, is efficiently solved at " dead angle " existing for communication link between target device D out of my cabin and spacecraft A, by carrying
The coverage that communication antenna sends and receives signal on high spacecraft A, improve logical between target device D and spacecraft A
Believe quality, the potential safety hazard that " lost contact " is further solved between target device D and spacecraft A.Meanwhile using transmit-receive sharing
Communication antenna, which also further avoid the single receiving and transmitting signal of communication antenna function, can not cover asking for spacecraft A surrounding spaces comprehensively
Topic.
According to one embodiment of the present invention, the communication pattern between spacecraft A and target device D is full-duplex mode
Communication.In the present embodiment, communicated between spacecraft A and target device D and use full duplex mode, and full duplex mode is adopted
With frequency division duplex mode FDD (Frequency Division Duplex).It is meanwhile logical between spacecraft A and target device D
Letter system uses direct sequency-code division multiple access mode DS-CDMA (Direct-Sequence Code Division Multiple
Access).By above-mentioned setting, it ensure that the target device D of spacecraft A out of my cabin can be assigned to corresponding spreading code.Especially exist
When multiple target device D being distributed with out of my cabin of spacecraft A, different spreading codes can be assigned between each target device D, from
And compare the differentiation for being advantageous to target device D.
To elaborate the present invention, the communication means of the present invention is further illustrated with reference to accompanying drawing.Forward direction in the present invention
Refer to that spacecraft A sends the direction of signal to target device D, then back refers to that target device D sends the side of signal to spacecraft A
To.
With reference to shown in Fig. 1, Fig. 2 and Fig. 3, step S1 is described in detail, according to one embodiment of the present invention, boat
After its device A is to target device distribution spreading code out of my cabin, spacecraft A passes through k (k >=1) road communication antenna on its bulkhead (the
One communication antenna B1, the second communication antenna B2..., kth communication antenna Bk) with predetermined time interval respectively to spacecraft A's
Target device D out of my cabin sends forward signal chip.It is pointed out that predetermined time interval is sent out for adjacent two-way communication antenna
The chip delay differed between forward signal chip is sent, i.e. spacecraft A sends system using staggering the time, i.e., passes through spread spectrum by same
Forward signal chip after modulation, pass through k roads communication antenna (the first communication antenna B respectively1, the second communication antenna B2、......、
Kth communication antenna Bk) successively differ certain time interval transmission of staggering the time.In the present embodiment, time interval is transmission
The chip delay of forward signal chip, therefore time interval could be arranged to n (n >=1) individual chip delay.It can thus be appreciated that k roads lead to
Believe the antenna maximum time interval for differing (k-1) * n chip delays each other.
With reference to shown in Fig. 1, Fig. 2 and Fig. 3, step S2 is described in detail, according to one embodiment of the present invention, mesh
Marking device D receives spacecraft A and passes through k roads communication antenna (the first communication antenna B1, the second communication antenna B2..., kth communication
Antenna Bk) send forward signal chip.Referring to Fig. 4, in the present embodiment, in target device D it is automatic set receive before to
The correlation length of signal chip is the integral multiple of forward signal chip frame length.
Wherein, step S2 also includes the following steps：
Step S21, in the present embodiment, by the way that the k roads received communicate by bit in the target device D
The peak value for the forward signal chip that antenna is sent obtains first big compared with the thresholding set in target device D
In the peak value b of thresholding1。
Step S22, in the present embodiment, target device D with first be more than thresholding peak value b1Before corresponding
To based on signal chip, the peak value b in adjacent forward signal chip is obtained2、...、bk。
Step S23, in the present embodiment, the forward signal chip that target device sends the k roads communication antenna of acquisition
In peak value b1、b2、...、bkRespectively compared with the thresholding set in target device D.
With reference to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, step S3 is described in detail, according to a kind of embodiment party of the present invention
Formula, the peak value b in the forward signal chip that target device D is sent from k roads communication antenna1、b2、...、bkMiddle acquisition reaches thresholding
The peak value of value, and the forward signal chip corresponding with the peak value of acquisition is extracted and merged by target device D.
Wherein, step S3 also includes the following steps：
The forward signal chip of merging is carried out CRC check by step S31, in the present embodiment, target device, and target is set
Standby D is according to assessment signal chip of the check results generation with spreading code.Meanwhile target device D by generation and with spread spectrum
The assessment signal chip of code is sent to spacecraft.
Step S32, in the present embodiment, target device D generates assessment signal chip according to CRC check result to be included
First ack signal or the first NACK signal.In the present embodiment, the first ack signal represents that CRC check result is correct, represents
Current ink is normal, and the first NACK signal represents CRC check result mistake, represents current link error.In the present embodiment,
Target device D sends the first ack signal to spacecraft A, shows the forward link between spacecraft A and target device D out of my cabin
Normally；Target device D sends the first NACK signal to spacecraft A, and the first NACK signal number that target device D is sent is small
The thresholding set in spacecraft A, show the forward link mistake between spacecraft A and target device D, but still keep current
Forward link；Target device D sends the first NACK signal, and the first NACK signal that target device D is sent to spacecraft A
Number is more than the thresholding set in spacecraft A, shows the forward link mistake between spacecraft A and target device D, before current
Disconnected to link, need to establish new forward link again through aforementioned manner between spacecraft A and target device D.
Set by the connection of forward link between above-mentioned spacecraft A and target device D, spacecraft A can be by surrounding
Communication antenna on its bulkhead sends forward signal (i.e. forward signal chip) around, and the space around spacecraft A is covered
Lid, avoid producing " dead angle " of signal transmitting, avoid the situation that " lost contact " is produced between target device D and spacecraft A.Space flight
Device A sends signal by staggering the time for equal time distances, improves the efficiency and quality of target device D reception signals, while
In time analysis can be carried out to the signal of reception successively for target device D and reserve the time.Pass through above-mentioned setting, target device D
Merged by the signal that peak value is reached to thresholding, the letter that multichannel communication multiple telecommunication is sent can be received simultaneously by further ensuring target device
Number, the stability of target device D reception signals is improved, so as to solve between spacecraft A and target device D communication links
Multipath effect, i.e., the signal sent by receiving the communication antenna of diverse location, avoid at " dead angle " that signal transmits.Meanwhile
According to the present invention also further such that the target device D of spacecraft A out of my cabin scope of activities is expanded, avoid due to " losing
Connection " target device D caused by problem can not be a wide range of movable the drawbacks of.
With reference to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, step S4 is described in detail, according to a kind of embodiment party of the present invention
Formula, spacecraft A receive the assessment signal chip with spreading code of target device D transmissions by k roads communication antenna.And to target
Equipment D returns to confirmation, so that target device D and spacecraft A includes the step of establishing communication connection：
Step S41. spacecrafts A receives assessment signal chip by multichannel communication multiple telecommunication antenna and merged.
Wherein, step S41 also includes the following steps：
Step S411, in the present embodiment, the back corresponding with target device D out of my cabin is stored with spacecraft A
Synchronous code, back synchronous code are corresponding with the spreading code on target device D.With first via communication antenna B1Exemplified by illustrate, first
Road communication antenna B1The assessment signal chip that target device D is sent is received, spacecraft A communicates by obtaining the first via by bit
Antenna B1The peak value of each assessment signal chip received, and spacecraft A is by the peak of each assessment signal chip of acquisition
Value is compared with the thresholding in spacecraft A.
Step S412, in the present embodiment, spacecraft A obtain the peak value for reaching thresholding, and spacecraft A will be with reaching thresholding
The corresponding assessment signal chip of peak value matched with back synchronous code, complete point of the assessment signal chip to receiving
Class.It will be apparent that spacecraft A is through the above way to the second communication antenna B2..., kth communication antenna BkIn receive
Assessment signal chip classified.
Step S413, in the present embodiment, with reference to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 5, spacecraft A communicates to the first via
Antenna B1, the second communication antenna B2..., kth communication antenna BkAfter the classification of the assessment signal chip received, spacecraft A
The assessment signal chip for belonging to same back synchronous code is merged respectively.
Step S42. spacecrafts A verifies to the assessment signal chip after merging, and according to check results to mesh
Marking device D sends confirmation.
Wherein, step S42 also includes the following steps：
Step S421, in the present embodiment, spacecraft A carry out CRC to the assessment signal chip after each merging respectively
Verification, and corresponding confirmation is generated according to each check results.Simultaneously spacecraft A by communication antenna to each target
Equipment sends confirmation, it should be pointed out that the confirmation of generation is corresponding with back synchronous code, i.e., a target is set
The standby corresponding confirmation of D.
Step S422, in the present embodiment, the confirmation that spacecraft A generates according to CRC check result include
Two ack signals or the second NACK signal.In the present embodiment, the second ack signal represents that CRC check result is correct, represents and works as
Preceding link is normal, and the second NACK signal represents CRC check result mistake, represents current link error.In the present embodiment, navigate
Its device A sends the second ack signal to target device D, shows return link between target device D out of my cabin and spacecraft A just
Often；Spacecraft A sends the second NACK signal to target device D, and the second NACK signal number that spacecraft A is sent is less than mesh
The thresholding set in marking device D, show the return link mistake between target device D out of my cabin and spacecraft A, but still keep
Current return link；Spacecraft A sends the second NACK signal, and the 2nd NACK letters that spacecraft A is sent to target device D
Number number is more than the thresholding set in target device D, shows that the return link between target device D out of my cabin and spacecraft A is wrong
By mistake, current return link disconnects, and needs to establish new back again through aforementioned manner between target device D and spacecraft A
Link.
Set by the connection of return link between above-mentioned target device D and spacecraft A, spacecraft A can be by surrounding
The back signal around communication antenna reception on its bulkhead, avoids the back signal in spacecraft A Stall surrounding spaces
(i.e. assessment signal chip), avoid producing " dead angle " that signal receives, avoid to produce between target device D and spacecraft A and " lose
The situation of connection ".Spacecraft A is only chosen and merged to the back signal for reaching thresholding, is avoided to the back less than thresholding
The processing of signal, the efficiency that spacecraft A is handled reception signal is improved, saves the signal transacting in time and spacecraft A
The resource of unit.By above-mentioned setting, spacecraft A is merged by the way that peak value to be reached to the signal of thresholding, further ensures space flight
Device A can receive the signal that target device D is sent simultaneously by multichannel communication multiple telecommunication antenna, improve the steady of spacecraft A reception signals
Qualitative, so as to solve the multipath effect between spacecraft A and target device D communication links, i.e. target device D is located at spacecraft
The diverse locations of A out of my cabin, the back signal that target device D is sent can be received by communication antenna, avoid the " dead of signal transmission
Angle ".Meanwhile avoided according to the present invention also further such that the target device D of spacecraft A out of my cabin scope of activities is expanded
Because target device D caused by " lost contact " problem can not be a wide range of movable the drawbacks of.
The above is only enumerating for the concrete scheme of the present invention, should for the equipment and structure of wherein not detailed description
When being interpreted as taking the existing common apparatus in this area and universal method to be practiced.
The scheme of the present invention is the foregoing is only, is not intended to limit the invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. the communication means of a kind of spacecraft and target device out of my cabin, including：
S1. the multichannel communication multiple telecommunication antenna of spacecraft is sent to the target device out of my cabin of the spacecraft respectively with predetermined time interval
Forward signal chip；
S2. the target device receives the forward signal chip, and the target device is by the forward signal chip
Peak value is compared with thresholding；
S3. the target device each road communication antenna is launched and peak value reach the forward signal chip combination of thresholding,
And based on amalgamation result generation assessment signal chip, sent to the spacecraft；
S4. the spacecraft receives the assessment signal chip, and returns to confirmation to the target device, so that the mesh
Marking device is established with the spacecraft and communicated to connect.
2. communication means according to claim 1, it is characterised in that the target device receives the forward signal code
Piece, and the target device by the peak value of the forward signal chip compared with thresholding the step of include：
S21. the target device passes through the peak for the forward signal chip for by bit sending each road communication antenna received
Value is compared with the thresholding, to obtain first peak value for being more than thresholding；
S22. the forward signal of the peak value with being more than thresholding with first is obtained based on first peak value more than thresholding
Peak value in the adjacent one or more forward signal chips of chip；
S23. the peak value in the forward signal chip sent to each road communication antenna is compared with the thresholding.
3. communication means according to claim 1, it is characterised in that the target device launches each road communication antenna
And peak value reaches the forward signal chip combination of thresholding, and based on amalgamation result generation assessment signal chip, to the boat
The step of its device is sent includes：
S31. the target device carries out CRC check to the forward signal chip after merging；
S32. according to CRC check result, the assessment signal chip of the target device generation with spreading code, to the spacecraft
Send；The assessment signal chip includes the first ack signal or the first NACK signal, wherein, the first ack signal represents CRC schools
It is correct to test result, it is normal to represent current ink, and the first NACK signal represents CRC check result mistake, represents current link error,
The spreading code is used to identify the target device.
4. communication means according to claim 3, it is characterised in that the target device generates assessment signal chip, to
The step of spacecraft is sent includes：
When the target device sends first ack signal, the forward direction between the spacecraft and the target device out of my cabin
Link is normal；
When the target device sends first NACK signal, and first NACK signal time that the target device is sent
Number is less than the thresholding set in the spacecraft, the forward link mistake between the spacecraft and the target device；
When the target device sends first NACK signal, and first NACK signal time that the target device is sent
Number is more than the thresholding set in the spacecraft, re-executes step S1-S3.
5. communication means according to claim 4, it is characterised in that the spacecraft receives the assessment signal chip,
And confirmation is returned to the target device, so that the target device is established in the step of communicating to connect with the spacecraft
Including,
S41. the spacecraft receives the assessment signal chip by communication antenna described in multichannel and merged；
S42. the spacecraft verifies to the assessment signal chip after merging, and according to check results to the target
Equipment sends confirmation.
6. communication means according to claim 5, it is characterised in that the spacecraft is connect by communication antenna described in multichannel
In the step of receiving the assessment signal chip and merging, including：
S411. the spacecraft by the peak value of assessment signal chip that by bit receives each road communication antenna with it is described
The thresholding set in spacecraft is compared, to obtain the peak value more than thresholding；
S412. based on the reverse sync stored in the spreading code in the assessment signal chip and the spacecraft
Code, the assessment signal chip for having the peak value more than the thresholding in each road communication antenna is matched, wherein, the expansion
Frequency code corresponds with the reverse sync code；
S413. the assessment signal chip combination that the spacecraft will match.
7. communication means according to claim 5, it is characterised in that the spacecraft is to the assessment signal after merging
Chip is verified, and according to check results to the target device send confirmation the step of include：
S421. the spacecraft carries out CRC check to the assessment signal chip after merging；
S422. according to CRC check result, the spacecraft generates confirmation, and is sent to the target device；The confirmation
Information includes the second ack signal or the second NACK signal, wherein, the second ack signal represents that CRC check result is correct, represents and works as
Preceding link is normal, and the second NACK signal represents CRC check result mistake, represents current link error.
8. communication means according to claim 7, it is characterised in that the spacecraft generates confirmation, and to described
Also include in the step of target device is sent：
When the spacecraft sends the second ack signal, the return link between the target device and the spacecraft is normal；
When the number of the spacecraft the second NACK signal of transmission, and the spacecraft the second NACK signal of transmission is less than the mesh
The thresholding set in marking device, the return link mistake between the target device and the spacecraft；
When the number of the spacecraft the second NACK signal of transmission, and the spacecraft the second NACK signal of transmission is more than the mesh
The thresholding set in marking device, re-execute step S4.
9. communication means according to claim 1, it is characterised in that communicated between the spacecraft and the target device
Using full duplex mode, and full duplex mode uses frequency division duplex mode；
Communication system between the spacecraft and the target device uses direct sequency-code division multiple access mode.
10. communication means according to claim 1, it is characterised in that the predetermined time interval communicates for adjacent two-way
Antenna sends the chip delay differed between the forward signal chip.
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| US20090121928A1 (en) * | 2007-11-12 | 2009-05-14 | Qualcomm Incorporated | Suppression of Multipath Effects for Received SPS Signals |
| CN105958192A (en) * | 2016-05-12 | 2016-09-21 | 北京航空航天大学 | Double-frequency anti-multipath navigation antenna adopting Peano fractal electromagnetic band gap structure |
| CN106788887A (en) * | 2016-12-09 | 2017-05-31 | 天津大学 | A kind of soft decoding method received based on multi-path distributed transparent hard decision |
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| CN1264262A (en) * | 1999-11-10 | 2000-08-23 | 深圳市中兴通讯股份有限公司 | Multi-user detecting method and device for preventing multi-path association |
| CN101154973A (en) * | 2006-09-28 | 2008-04-02 | 美国博通公司 | Method and system for achieving space and time diversity gain |
| US20090121928A1 (en) * | 2007-11-12 | 2009-05-14 | Qualcomm Incorporated | Suppression of Multipath Effects for Received SPS Signals |
| CN105958192A (en) * | 2016-05-12 | 2016-09-21 | 北京航空航天大学 | Double-frequency anti-multipath navigation antenna adopting Peano fractal electromagnetic band gap structure |
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