CN116736356A - Communication satellite positioning navigation method and system - Google Patents

Communication satellite positioning navigation method and system Download PDF

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Publication number
CN116736356A
CN116736356A CN202310547191.2A CN202310547191A CN116736356A CN 116736356 A CN116736356 A CN 116736356A CN 202310547191 A CN202310547191 A CN 202310547191A CN 116736356 A CN116736356 A CN 116736356A
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satellite
grid
communication satellite
attribution
communication
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邹浩博
刘培
周必磊
邹兴
刘莹
韩鸣迪
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Shanghai Institute of Satellite Engineering
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Shanghai Institute of Satellite Engineering
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Priority to CN202310547191.2A priority Critical patent/CN116736356A/en
Publication of CN116736356A publication Critical patent/CN116736356A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position
    • 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
    • H04B7/18513—Transmission in a satellite or space-based system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

The application provides a communication satellite positioning navigation method and a system, comprising the following steps: the ground user access is realized by scanning the ground grid through the signaling beam; the ground user feeds back the device number to the communication satellite, and the communication satellite calculates the number attribution of the user by using a decoder on the satellite; the communication satellite finds the number attribution of the user with the most number attributions in a grid as the number attribution representative of the network; and calculating the pattern matching degree of the grid in the coverage area of the current communication satellite by using the locally stored number attribution grid, finding out the nearest pattern area, and calculating the center point coordinate as the communication satellite coordinate. According to the application, the matching degree of the communication satellite is calculated by utilizing the signaling beam of the communication satellite and the characteristics of the ground user, so that the matching degree of the communication satellite is obtained, the current satellite coordinates are obtained, the reliability of the communication satellite is improved, and the complexity of a communication satellite positioning navigation system is reduced.

Description

Communication satellite positioning navigation method and system
Technical Field
The application relates to the technical field of satellite navigation and positioning, in particular to a communication satellite positioning navigation method and system.
Background
In recent years, due to the continuous improvement of the demand for wide area satellite communication capacity and the gradual exhaustion of available frequency bands, a low-orbit internet satellite constellation system is gradually on stage, a low-orbit satellite communication constellation is newly built on the way around the world, and an integrated comprehensive information network with seamless global coverage is formed by using the low-orbit satellite constellation, so that the demand for high capacity, wide coverage and multiple service quality of users of a wireless network has become a research hotspot, and is an important direction of wireless communication development in the future.
For communication satellites, location information is one of the more important information. Functions such as quality of service, assurance, security policy, service policy formulation, network slicing arrangement and the like are all required to be provided through satellite position information, and if a satellite loses the acquisition capability of the position information, only a link layer function can be executed, and further functions cannot be completed. This further increases the complexity of the satellite, since the communication satellites currently use independent positioning means. The satellite positioning method can utilize the communication link of the satellite to position, simplify the complexity of the satellite and improve the reliability of the satellite.
In chinese patent document with publication number CN102004237a, a satellite navigation positioning method and a receiver are provided. The satellite navigation positioning method comprises the following steps: acquiring position information of at least five satellites and pseudo ranges from each satellite to a receiver at different moments within a preset satellite transmitting signal time error range; according to the position information and the pseudo range, solving clock deviation between the receiver clocks at different moments and GPS time and the position of the receiver; and solving residual errors of the satellites at different moments and comparing, wherein the position of the receiver corresponding to the minimum residual error is the positioning position of the receiver, and the residual error is the difference between the true distance from the receiver to the satellite and the pseudo range.
In the chinese patent document with publication number CN101033980, a geographic position positioning method of a positioning navigator is provided, a surface digital map in a fixed field is divided into a network, the sizes of the grids are the same, and the coordinates of the grids on the surface digital map are calculated; giving different trellis codes to the respective trellis; associating the grid codes of the grids with coordinates thereof; when any grid code is input through the touch screen of the positioning navigator, the positioning navigator calculates the coordinates of the grid corresponding to the grid code on the surface digital map, and then the geographic position of the grid on the surface digital map is displayed through the touch screen.
In the chinese patent document with publication number CN104678408A, a satellite-borne navigation receiver time service method is provided, which includes: generating a second pulse; acquiring satellite transmitting time and observation carrier phase in the navigation satellite signal at the second pulse rising edge; calculating a pseudo range as an observed pseudo range according to the satellite transmitting time and the observed carrier phase, constructing a solving equation, and obtaining the position, speed, time, frequency difference and clock difference of the satellite navigation receiver through solving; performing quality improvement treatment on the frequency difference and the clock difference; according to the improved frequency difference and clock difference, the phase and frequency of the second pulse are adjusted, so that the rising edge of the second pulse is synchronous with the whole second starting moment of the standard time; broadcasting the adjusted second pulse to other electronic systems on the satellite; broadcasting said position, velocity, time to said other electronic systems on the satellite before the arrival of the next said adjusted second pulse; and generating and updating a telemetry amount related to time and giving a response when the navigation satellite requests a corresponding telemetry amount.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a communication satellite positioning navigation method and a system.
The communication satellite positioning navigation method provided by the application comprises the following steps:
step 1: for a communication satellite which works normally in orbit and inquires the attribution of the user number, the ground grid is scanned by utilizing the signaling beam of the communication satellite, so that the ground user accesses a control channel;
step 2: the ground user feeds back the own device number to the communication satellite, and the number attribution of the user is calculated by using a decoder on the satellite;
step 3: after the signaling beam is switched, the number attribution of the user with the most number attributions in one grid is found and used as the number attribution representation of the grid, whether the number attribution representation information of the grid is effective or not is judged, if yes, the number attribution representation information is stored for standby, otherwise, the number attribution representation information is abandoned;
step 4: after the communication satellite acquires the preset number of effective grid information, calculating the pattern matching degree of grids in the current communication satellite coverage area by utilizing a number home grid map stored locally by the communication satellite, and finding out the nearest pattern area; if the pattern matching degree is higher than a preset threshold, calculating the center point coordinate of the pattern area as the communication satellite lower point coordinate, otherwise, failing to locate; if the matching degree of a plurality of areas is higher than a preset threshold value and equal to the threshold value, calculating the average value of the coordinates to be used as the coordinates of the own satellite point; and when the communication satellite positioning fails, restarting to scan the signaling beam until the communication satellite position is successfully positioned.
Preferably, the step 1 includes: according to the characteristics of the self antenna, the communication satellite determines grid division in the coverage area of the satellite wave beam by utilizing the direction of the satellite antenna;
when the satellite points to the grid area by using the signaling beam, the ground user accesses the satellite control channel by using a competitive random access mode.
Preferably, the step 2 includes: according to different areas where the ground users are located, the ground users claim different numbers, and the fields on the numbers represent the geographic positions of the attribution of the numbers from large to small;
the communication satellite sequentially reads the user equipment number information and sequentially determines the location of each ground user number.
Preferably, the step 3 includes: and counting the number of users in the grid, if the number of users is less than a preset threshold value, judging that the grid representative point information is invalid, otherwise, judging that the grid representative point information is valid.
PreferablySaid step 4 comprises: calculating the pattern matching degree of grids in the coverage area of the current communication satellite by using an average absolute error algorithm, dividing M areas along the longitude direction by the number attribution map grids stored on the satellite, dividing N areas along the latitude direction, wherein the number of grids is M multiplied by N, and each grid point value is S (i M ,j N ) Namely the attribution number stored on the satellite; the satellite-covered region is divided into m regions in the longitudinal direction and n regions in the latitudinal direction, the number of grids is m×n, and each grid point has a value of T (i m ,j n ) Namely, the calculated attribution number of the representative point, wherein (i, j) is longitude and latitude coordinates of the representative point of the region;
definition of the degree of matching D (i, j):
wherein the operation isDefined as an exclusive-or algorithm, namely:
traversing all combinations of (i, j) until the matching degree of all areas is calculated;
wherein s and t are independent variables of a formula;
if the region representative point with the best matching degree is (i) z ,j z ) Reading point by using position information stored in number attribution gridAnd->The coordinates of the satellite point below the satellite are +.>
The communication satellite positioning navigation system provided by the application comprises:
module M1: for a communication satellite which works normally in orbit and inquires the attribution of the user number, the ground grid is scanned by utilizing the signaling beam of the communication satellite, so that the ground user accesses a control channel;
module M2: the ground user feeds back the own device number to the communication satellite, and the number attribution of the user is calculated by using a decoder on the satellite;
module M3: after the signaling beam is switched, the number attribution of the user with the most number attributions in one grid is found and used as the number attribution representation of the grid, whether the number attribution representation information of the grid is effective or not is judged, if yes, the number attribution representation information is stored for standby, otherwise, the number attribution representation information is abandoned;
module M4: after the communication satellite acquires the preset number of effective grid information, calculating the pattern matching degree of grids in the current communication satellite coverage area by utilizing a number home grid map stored locally by the communication satellite, and finding out the nearest pattern area; if the pattern matching degree is higher than a preset threshold, calculating the center point coordinate of the pattern area as the communication satellite lower point coordinate, otherwise, failing to locate; if the matching degree of a plurality of areas is higher than a preset threshold value and equal to the threshold value, calculating the average value of the coordinates to be used as the coordinates of the own satellite point; and when the communication satellite positioning fails, restarting to scan the signaling beam until the communication satellite position is successfully positioned.
Preferably, the module M1 comprises: according to the characteristics of the self antenna, the communication satellite determines grid division in the coverage area of the satellite wave beam by utilizing the direction of the satellite antenna;
when the satellite points to the grid area by using the signaling beam, the ground user accesses the satellite control channel by using a competitive random access mode.
Preferably, the module M2 comprises: according to different areas where the ground users are located, the ground users claim different numbers, and the fields on the numbers represent the geographic positions of the attribution of the numbers from large to small;
the communication satellite sequentially reads the user equipment number information and sequentially determines the location of each ground user number.
Preferably, the module M3 includes: and counting the number of users in the grid, if the number of users is less than a preset threshold value, judging that the grid representative point information is invalid, otherwise, judging that the grid representative point information is valid.
Preferably, the module M4 includes: calculating the pattern matching degree of grids in the coverage area of the current communication satellite by using an average absolute error algorithm, dividing M areas along the longitude direction by the number attribution map grids stored on the satellite, dividing N areas along the latitude direction, wherein the number of grids is M multiplied by N, and each grid point value is S (i M ,j N ) Namely the attribution number stored on the satellite; the satellite-covered region is divided into m regions in the longitudinal direction and n regions in the latitudinal direction, the number of grids is m×n, and each grid point has a value of T (i m ,j n ) Namely, the calculated attribution number of the representative point, wherein (i, j) is longitude and latitude coordinates of the representative point of the region;
definition of the degree of matching D (i, j):
wherein the operation isDefined as an exclusive-or algorithm, namely:
traversing all combinations of (i, j) until the matching degree of all areas is calculated;
wherein s and t are independent variables of a formula;
if the region representative point with the best matching degree is (i) z ,j z ) Reading point by using position information stored in number attribution gridAnd->The coordinates of the satellite point below the satellite are +.>
Compared with the prior art, the application has the following beneficial effects:
aiming at the problem that the current communication satellite positioning device is complex, the application calculates the matching degree of the current communication satellite coverage area and the global number attribution map to match the communication satellite by utilizing the signaling beam of the communication satellite and the characteristics of the ground user and by means of an average absolute error algorithm, obtains the current satellite coordinates, improves the reliability of the communication satellite and reduces the complexity of a communication satellite positioning navigation system.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a communication satellite positioning navigation method and apparatus according to the present application;
FIG. 2 is a flow chart of a method for positioning and navigating a communication satellite according to the present application;
FIG. 3 is a schematic diagram of a communication satellite positioning navigation device according to the present application;
FIG. 4 is a schematic diagram of the initial results of satellite scanning;
FIG. 5 is a schematic diagram of the final satellite scanning result;
fig. 6 is a schematic diagram of a satellite stored number home grid map.
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
Example 1:
as shown in fig. 2, the present application provides a communication satellite positioning navigation method, which includes: for a communication satellite which works normally in orbit and inquires the attribution of the user number, the ground grid is scanned by utilizing the signaling beam of the communication satellite, so that the ground user accesses a control channel; the ground user feeds back the own device number to the communication satellite, and the communication satellite calculates and obtains the number attribution of the user by using a decoder on the satellite; after the signaling beam is switched, the communication satellite finds out the number attribution of the user with the most number attribution in a grid as the number attribution representative of the network; after the grid representative points are determined, the satellite judges whether the grid representative point information is effective, if so, the satellite stores the grid representative point information for standby, otherwise, the satellite discards the data; after the communication satellite acquires enough effective grid information, calculating the pattern matching degree of grids in the current communication satellite coverage area by utilizing a number home grid map stored locally, and finding out the nearest pattern area; if the pattern matching degree is higher than the threshold value, calculating the center point coordinate of the pattern area as the communication satellite lower point coordinate, otherwise, failing positioning; if the matching degree of a plurality of areas is higher than the threshold value and equal, calculating the average value of the coordinates as the own coordinates of the points under the satellite; when the communication satellite positioning fails, the signaling beam scanning is restarted until the communication satellite position is successfully positioned.
The line beam scans the ground grid to allow the ground user to access the control channel, comprising: according to the characteristics of the self antenna, the communication satellite determines grid division in the coverage area of the satellite wave beam by utilizing the direction of the satellite antenna; when the satellite points to the grid area by using the signaling beam, the ground user accesses the satellite control channel by using a competitive random access mode.
The communication satellite uses a decoder on the satellite to calculate and obtain the number attribution of the user, and the method comprises the following steps: the ground user can get different numbers according to different areas, and the field on the number reflects the geographical position of the number attribution from large to small; the communication satellite sequentially reads the user equipment number information and sequentially determines the location of each ground user number.
Judging whether the grid representative point information is valid or not, comprising: and counting the number of users in the grid, if the number of users is less than a threshold value, judging that the grid representative point information is invalid, otherwise, judging that the grid representative point information is valid.
Counting the number of effective grid points, and if the proportion of the number of representative points to the total number is greater than 0.2, considering that enough grid data is collected.
Calculating the pattern matching degree of the grid in the coverage area of the current communication satellite comprises the following steps: when enough effective grid information is collected, the communication satellite utilizes the number attribution grid map stored by the communication satellite and calculates by using an average absolute error algorithm, and the specific method is as follows: let the number home grid map grid granularity be m×n, each grid point value be S (d, e), i.e. home number, satellite covered area be m×n, each grid point value be T (d, e), i.e. home number.
Definition of the degree of matching D (i, j):
wherein (i, j) is the region representative point, and the operationThe definition is exclusive or algorithm: />All combinations of (i, j) are traversed until all regions are calculated.
Calculating the coordinates of the central point of the graphic area as the coordinates of the lower point of the communication satellite comprises: if the region representative point with the best matching degree is (i) z ,j z ) Then the position information stored in the number home grid is used to read the point (X iz ,Y yz ) And (X) iz+m ,Y yz+n ) The coordinates of the satellite point are
As shown in fig. 3, the present application provides a communication satellite positioning navigation device, mainly comprising: the storage device is mainly used for storing the number attribution grid map and updating the number attribution grid map on a satellite by utilizing a satellite communication link; the computing device is mainly used for reading the grid information and the number attribution information of the user and computing the satellite point coordinates by utilizing the stored number attribution grid map.
Fig. 1 shows a scenario in which a communication satellite scans with its own signaling beam during normal operation. The ground user accesses the control channel and feeds back the own device number to the communication satellite, the communication satellite calculates the number attribution of the user by using a decoder on the satellite, and the result is shown in fig. 4.
After the result is obtained, the grids with the number not meeting the requirement are removed, the number with the largest proportion is found in each area, the final result of data processing is shown in fig. 5, and the data processing has enough effective grid information.
And calculating and comparing the matching degree by using the number attribution grid map stored by the satellite in the figure 6, and finally obtaining that the block with the representative point of (6, 3) is close to the matching degree of the satellite block. Finally, the coordinates 110 DEG E, 50 DEG W,120 DEG E and 40 DEG W of the points (6, 3) and the points (11, 8) are utilized to obtain the coordinates 115 DEG E and 45 DEG W of the points under the satellite.
Example 2:
the application also provides a communication satellite positioning navigation system which can be realized by executing the flow steps of the communication satellite positioning navigation method, namely, the communication satellite positioning navigation method can be understood as a preferred implementation mode of the communication satellite positioning navigation system by a person skilled in the art.
The application provides a communication satellite positioning navigation system, which comprises: module M1: for a communication satellite which works normally in orbit and inquires the attribution of the user number, the ground grid is scanned by utilizing the signaling beam of the communication satellite, so that the ground user accesses a control channel; module M2: the ground user feeds back the own device number to the communication satellite, and the number attribution of the user is calculated by using a decoder on the satellite; module M3: after the signaling beam is switched, the number attribution of the user with the most number attributions in one grid is found and used as the number attribution representation of the grid, whether the number attribution representation information of the grid is effective or not is judged, if yes, the number attribution representation information is stored for standby, otherwise, the number attribution representation information is abandoned; module M4: after the communication satellite acquires the preset number of effective grid information, calculating the pattern matching degree of grids in the current communication satellite coverage area by utilizing a number home grid map stored locally by the communication satellite, and finding out the nearest pattern area; if the pattern matching degree is higher than a preset threshold, calculating the center point coordinate of the pattern area as the communication satellite lower point coordinate, otherwise, failing to locate; if the matching degree of a plurality of areas is higher than a preset threshold value and equal to the threshold value, calculating the average value of the coordinates to be used as the coordinates of the own satellite point; and when the communication satellite positioning fails, restarting to scan the signaling beam until the communication satellite position is successfully positioned.
The module M1 includes: according to the characteristics of the self antenna, the communication satellite determines grid division in the coverage area of the satellite wave beam by utilizing the direction of the satellite antenna; when the satellite points to the grid area by using the signaling beam, the ground user accesses the satellite control channel by using a competitive random access mode.
The module M2 includes: according to different areas where the ground users are located, the ground users claim different numbers, and the fields on the numbers represent the geographic positions of the attribution of the numbers from large to small; the communication satellite sequentially reads the user equipment number information and sequentially determines the location of each ground user number.
The module M3 includes: and counting the number of users in the grid, if the number of users is less than a preset threshold value, judging that the grid representative point information is invalid, otherwise, judging that the grid representative point information is valid.
The module M4 includes: calculating the pattern matching degree of grids in the coverage area of the current communication satellite by using an average absolute error algorithm, dividing M areas along the longitude direction by the number attribution map grids stored on the satellite, and dividing the M areas along the latitude directionDividing N areas into M×N grids, each grid point having a value S (i M ,j N ) Namely the attribution number stored on the satellite; the satellite-covered region is divided into m regions in the longitudinal direction and n regions in the latitudinal direction, the number of grids is m×n, and each grid point has a value of T (i m ,j n ) Namely, the calculated attribution number of the representative point, wherein (i, j) is longitude and latitude coordinates of the representative point of the region;
definition of the degree of matching D (i, j):
wherein the operation isDefined as an exclusive-or algorithm, namely:
traversing all combinations of (i, j) until the matching degree of all areas is calculated;
wherein s and t are independent variables of a formula;
if the region representative point with the best matching degree is (i) z ,j z ) Reading point by using position information stored in number attribution gridAnd->The coordinates of the satellite point below the satellite are +.>
Those skilled in the art will appreciate that the systems, apparatus, and their respective modules provided herein may be implemented entirely by logic programming of method steps such that the systems, apparatus, and their respective modules are implemented as logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc., in addition to the systems, apparatus, and their respective modules being implemented as pure computer readable program code. Therefore, the system, the apparatus, and the respective modules thereof provided by the present application may be regarded as one hardware component, and the modules included therein for implementing various programs may also be regarded as structures within the hardware component; modules for implementing various functions may also be regarded as being either software programs for implementing the methods or structures within hardware components.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. A method of positioning and navigating a communication satellite, comprising:
step 1: for a communication satellite which works normally in orbit and inquires the attribution of the user number, the ground grid is scanned by utilizing the signaling beam of the communication satellite, so that the ground user accesses a control channel;
step 2: the ground user feeds back the own device number to the communication satellite, and the number attribution of the user is calculated by using a decoder on the satellite;
step 3: after the signaling beam is switched, the number attribution of the user with the most number attributions in one grid is found and used as the number attribution representation of the grid, whether the number attribution representation information of the grid is effective or not is judged, if yes, the number attribution representation information is stored for standby, otherwise, the number attribution representation information is abandoned;
step 4: after the communication satellite acquires the preset number of effective grid information, calculating the pattern matching degree of grids in the current communication satellite coverage area by utilizing a number home grid map stored locally by the communication satellite, and finding out the nearest pattern area; if the pattern matching degree is higher than a preset threshold, calculating the center point coordinate of the pattern area as the communication satellite lower point coordinate, otherwise, failing to locate; if the matching degree of a plurality of areas is higher than a preset threshold value and equal to the threshold value, calculating the average value of the coordinates to be used as the coordinates of the own satellite point; and when the communication satellite positioning fails, restarting to scan the signaling beam until the communication satellite position is successfully positioned.
2. The method of positioning and navigation by communication satellites according to claim 1, wherein the step 1 comprises: according to the characteristics of the self antenna, the communication satellite determines grid division in the coverage area of the satellite wave beam by utilizing the direction of the satellite antenna;
when the satellite points to the grid area by using the signaling beam, the ground user accesses the satellite control channel by using a competitive random access mode.
3. The method of positioning and navigation by communication satellites according to claim 1, wherein the step 2 comprises: according to different areas where the ground users are located, the ground users claim different numbers, and the fields on the numbers represent the geographic positions of the attribution of the numbers from large to small;
the communication satellite sequentially reads the user equipment number information and sequentially determines the location of each ground user number.
4. The method of positioning and navigation by communication satellites according to claim 1, wherein the step 3 comprises: and counting the number of users in the grid, if the number of users is less than a preset threshold value, judging that the grid representative point information is invalid, otherwise, judging that the grid representative point information is valid.
5. The method of positioning and navigation by communication satellites according to claim 1, wherein the step 4 comprises: calculating the pattern matching degree of grids in the coverage area of the current communication satellite by using an average absolute error algorithm, dividing M areas along the longitude direction by the number attribution map grids stored on the satellite, dividing N areas along the latitude direction, wherein the number of the grids is M multiplied by N, and each grid isLattice point value S (i M ,j N ) Namely the attribution number stored on the satellite; the satellite-covered region is divided into m regions in the longitudinal direction and n regions in the latitudinal direction, the number of grids is m×n, and each grid point has a value of T (i m ,j n ) Namely, the calculated attribution number of the representative point, wherein (i, j) is longitude and latitude coordinates of the representative point of the region;
definition of the degree of matching D (i, j):
wherein the operation +.is defined as an exclusive-or algorithm, namely:
traversing all combinations of (i, j) until the matching degree of all areas is calculated;
wherein s and t are independent variables of a formula;
if the region representative point with the best matching degree is (i) z ,j z ) Then the position information stored in the number home grid is used to read the point (X iz ,Y yz ) And (X) iz+m ,Y yz+n ) The coordinates of the satellite point are
6. A communications satellite positioning navigation system, comprising:
module M1: for a communication satellite which works normally in orbit and inquires the attribution of the user number, the ground grid is scanned by utilizing the signaling beam of the communication satellite, so that the ground user accesses a control channel;
module M2: the ground user feeds back the own device number to the communication satellite, and the number attribution of the user is calculated by using a decoder on the satellite;
module M3: after the signaling beam is switched, the number attribution of the user with the most number attributions in one grid is found and used as the number attribution representation of the grid, whether the number attribution representation information of the grid is effective or not is judged, if yes, the number attribution representation information is stored for standby, otherwise, the number attribution representation information is abandoned;
module M4: after the communication satellite acquires the preset number of effective grid information, calculating the pattern matching degree of grids in the current communication satellite coverage area by utilizing a number home grid map stored locally by the communication satellite, and finding out the nearest pattern area; if the pattern matching degree is higher than a preset threshold, calculating the center point coordinate of the pattern area as the communication satellite lower point coordinate, otherwise, failing to locate; if the matching degree of a plurality of areas is higher than a preset threshold value and equal to the threshold value, calculating the average value of the coordinates to be used as the coordinates of the own satellite point; and when the communication satellite positioning fails, restarting to scan the signaling beam until the communication satellite position is successfully positioned.
7. The communication satellite positioning navigation system of claim 6, wherein the module M1 comprises: according to the characteristics of the self antenna, the communication satellite determines grid division in the coverage area of the satellite wave beam by utilizing the direction of the satellite antenna;
when the satellite points to the grid area by using the signaling beam, the ground user accesses the satellite control channel by using a competitive random access mode.
8. The communication satellite positioning navigation system of claim 6, wherein the module M2 comprises: according to different areas where the ground users are located, the ground users claim different numbers, and the fields on the numbers represent the geographic positions of the attribution of the numbers from large to small;
the communication satellite sequentially reads the user equipment number information and sequentially determines the location of each ground user number.
9. The communication satellite positioning navigation system of claim 6, wherein the module M3 comprises: and counting the number of users in the grid, if the number of users is less than a preset threshold value, judging that the grid representative point information is invalid, otherwise, judging that the grid representative point information is valid.
10. The communication satellite positioning navigation system of claim 6, wherein the module M4 comprises: calculating the pattern matching degree of grids in the coverage area of the current communication satellite by using an average absolute error algorithm, dividing M areas along the longitude direction by the number attribution map grids stored on the satellite, dividing N areas along the latitude direction, wherein the number of grids is M multiplied by N, and each grid point value is S (i M ,j N ) Namely the attribution number stored on the satellite; the satellite-covered region is divided into m regions in the longitudinal direction and n regions in the latitudinal direction, the number of grids is m×n, and each grid point has a value of T (i m ,j n ) Namely, the calculated attribution number of the representative point, wherein (i, j) is longitude and latitude coordinates of the representative point of the region;
definition of the degree of matching D (i, j):
wherein the operation +.is defined as an exclusive-or algorithm, namely:
traversing all combinations of (i, j) until the matching degree of all areas is calculated;
wherein s and t are independent variables of a formula;
if the region representative point with the best matching degree is (i) z ,j z ) Then the position information stored in the number home grid is used to read the point (X iz ,Y yz ) And (X) iz+m ,Y yz+n ) The coordinates of the satellite point are
CN202310547191.2A 2023-05-15 2023-05-15 Communication satellite positioning navigation method and system Pending CN116736356A (en)

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