CN117288181B - Navigation source selection method and device - Google Patents
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- CN117288181B CN117288181B CN202311588430.5A CN202311588430A CN117288181B CN 117288181 B CN117288181 B CN 117288181B CN 202311588430 A CN202311588430 A CN 202311588430A CN 117288181 B CN117288181 B CN 117288181B
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- 238000010187 selection method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 26
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- 238000004590 computer program Methods 0.000 description 10
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/005—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 with correlation of navigation data from several sources, e.g. map or contour matching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/20—Instruments for performing navigational calculations
Abstract
The embodiment of the application provides a navigation source selection method and device, and relates to the technical field of navigation, wherein the method comprises the following steps: acquiring distance information, altitude information, relative position quality, time quality and geographic position quality of a navigation source based on PPLI information sent by the navigation source; judging whether the navigation source meets the distance difference requirement or not based on the distance information; if yes, judging whether the navigation source meets the height difference requirement or not based on the height information; if yes, judging whether the navigation source meets the quality requirement or not based on the relative position quality, the time quality and the geographic position quality of the navigation source; if yes, the navigation source is selected. According to the technical scheme, whether the navigation source accords with the distance difference requirement, the height difference requirement and the quality requirement is judged in sequence to select a proper navigation source, the whole selection logic is clear in level, and the optimal navigation source can be selected.
Description
Technical Field
The present application relates to the field of navigation technologies, and in particular, to a navigation source selection method and a navigation source selection device.
Background
The JTIDS system (combined tactical information distribution system) has stable relative navigation capability, but navigation source selection needs to be completed before relative navigation is performed for positioning calculation, and the selection of a navigation source with a better self-geometric configuration of a user with the JTIDS system can obviously improve relative positioning precision, so that how to select a navigation source suitable for the user is a technical problem which needs to be solved rapidly at present.
Disclosure of Invention
The embodiment of the application provides a navigation source selection method and a navigation source selection device.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned in part by the practice of the application.
According to a first aspect of an embodiment of the present application, there is provided a navigation source selection method applied to a signal receiving user provided with a JTIDS system, including:
acquiring distance information, altitude information, relative position quality, time quality and geographic position quality of a navigation source based on PPLI information sent by the navigation source;
judging whether the navigation source meets the distance difference requirement or not based on the distance information;
if yes, judging whether the navigation source meets the height difference requirement or not based on the height information;
if yes, judging whether the navigation source meets the quality requirement or not based on the relative position quality, the time quality and the geographic position quality of the navigation source;
if yes, the navigation source is selected.
In some embodiments of the present application, based on the foregoing solution, obtaining distance information of a navigation source based on PPLI information sent by the navigation source includes:
when the signal receiving user receives the PPLI information, detecting the arrival time of the PPLI information by using a JTIDS system;
distance information of the navigation source is determined based on the arrival time.
In some embodiments of the present application, based on the foregoing solution, the determining, based on the location information, whether the navigation source meets a distance difference requirement includes:
determining a distance difference between the navigation source and the signal receiving user based on the distance information;
and comparing the distance difference with a preset distance threshold, if the distance difference is larger than the distance threshold, judging that the navigation source meets the distance difference requirement, otherwise, not meeting the distance difference requirement.
In some embodiments of the present application, based on the foregoing solution, obtaining altitude information of a navigation source based on PPLI information sent by the navigation source includes:
and decoding the PPLI information to obtain the air pressure height of the navigation source as the height information of the navigation source.
In some embodiments of the present application, based on the foregoing solution, the determining, based on the altitude information, whether the navigation source meets an altitude difference requirement includes:
determining a height difference between the navigation source and the signal receiving user based on the height information and the height of the signal receiving user;
and comparing the height difference with a preset height difference threshold, and if the height difference is larger than the preset height difference threshold, judging that the navigation source meets the height difference requirement, otherwise, not meeting the height difference requirement.
In some embodiments of the present application, based on the foregoing scheme, obtaining the relative location quality, the time quality, and the geographic location quality based on the PPLI information sent by the navigation source includes:
and decoding the PPLI information to obtain the relative position quality, the time quality and the geographic position quality of the navigation source.
In some embodiments of the present application, based on the foregoing solution, the determining whether the navigation source meets the quality requirement based on the relative position quality, the time quality, and the geographic position quality of the navigation source includes:
acquiring the relative position quality and the geographic position quality of the signal receiving user;
judging whether the navigation source meets the first-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the requirement of a secondary quality grade or not based on the relative position quality and time quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the three-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
and if the navigation source meets the first-level quality level requirement, the second-level quality level requirement or the third-level quality level requirement, judging that the navigation source meets the quality requirement.
In some embodiments of the present application, based on the foregoing solution, after completing the navigation source selection, the method further includes:
and updating navigation information of the signal receiving user based on the navigation source.
In some embodiments of the present application, based on the foregoing solution, the updating the navigation information of the signal receiving user includes:
updating the geographic pseudo range of the signal receiving user based on the navigation source when the navigation source meets the first-level quality level requirement;
updating the grid pseudo range of the signal receiving user based on the navigation source when the navigation source meets the requirement of the secondary quality grade;
and updating the grid bias of the signal receiving user based on the navigation source when the navigation source meets the three-level quality level requirement.
According to a second aspect of embodiments of the present application, there is provided a navigation source selection device, including:
the acquisition unit is used for acquiring distance information, height information, relative position quality, time quality and geographic position quality of the navigation source based on the PPLI information sent by the navigation source;
the first judging unit is used for judging whether the navigation source meets the distance difference requirement or not based on the distance information;
the second judging unit is used for judging whether the navigation source meets the height difference requirement or not based on the height information;
the third judging unit is used for judging whether the navigation source meets the quality requirement or not based on the relative position quality, the time quality and the geographic position quality of the navigation source;
and the selection unit is used for selecting the navigation source which meets the distance difference requirement, the altitude difference requirement and the quality requirement.
According to a third aspect of embodiments of the present application, there is provided a computer readable storage medium having stored thereon computer instructions which, when run on the computer, cause the computer to perform the method of the first aspect described above.
According to a fourth aspect of embodiments of the present application, there is provided an electronic device comprising a memory and a processor;
the memory is used for storing computer instructions;
the processor is configured to invoke the computer instructions stored in the memory, so that the electronic device performs the method according to the first aspect.
According to the technical scheme, whether the navigation source accords with the distance difference requirement, the height difference requirement and the quality requirement is judged in sequence to select a proper navigation source, the whole selection logic is clear in level, and the optimal navigation source can be selected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 illustrates a flow diagram of a navigation source selection method according to one embodiment of the present application;
FIG. 2 illustrates a decision logic diagram of a navigation source selection method according to one embodiment of the present application;
FIG. 3 illustrates a schematic diagram of a navigation source transmitting PPLI information to a signal receiving user in accordance with one embodiment of the present application;
FIG. 4 illustrates a block diagram of a navigation source selection device according to one embodiment of the present application;
FIG. 5 illustrates a schematic diagram of an electronic device structure according to one embodiment of the present application;
fig. 6 shows a schematic diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the aspects of the application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, a flow diagram of a navigation source selection method according to one embodiment of the present application is shown.
Referring to fig. 2, a schematic diagram of determination logic of a navigation source selection method according to one embodiment of the present application is shown.
As shown in fig. 1, a navigation source selection method is shown, which is applied to a signal receiving user provided with a JTIDS system, and the method selects an optimal navigation source through a set of strict filtering logic, and specifically includes steps S100 to S500.
It will be appreciated that the signal receiving user described in the embodiments of the present application may be a spacecraft of some kind, such as an aircraft, and the navigation source is also provided with a JTIDS system.
Step S100, obtaining distance information, altitude information, relative position quality, time quality and geographic position quality of a navigation source based on PPLI information sent by the navigation source.
It will be appreciated that the PPLI (precise participant location and identification) information sent by the navigation source includes altitude information, relative position quality, time quality and geographic position quality of the navigation source, and the action of sending the PPLI information by the navigation source can obtain the distance information of the navigation source.
In some possible embodiments, based on the foregoing solution, obtaining distance information of a navigation source based on PPLI information sent by the navigation source includes:
when the signal receiving user receives the PPLI information, detecting the arrival time of the PPLI information by using a JTIDS system;
distance information of the navigation source is determined based on the arrival time.
For example, referring to fig. 3, a schematic diagram of a navigation source transmitting PPLI information to a signal receiving user according to one embodiment of the present application is shown.
As shown in fig. 3, the PPLI information of the navigation source a aircraft is sent to the signal receiving user B aircraft in the form of electromagnetic wave by the JTIDS terminal in the aircraft, after the B aircraft antenna receives the electromagnetic wave signal sent by the a aircraft, the radio frequency/baseband signal processing is completed in the JTIDS terminal in the B aircraft, the signal arrival time TOA (time of river) is detected, the TOA distance information is obtained by subtracting the starting time of the current time slot from the time, and the distance represents the distance from the a aircraft to the B aircraft measured by the JTIDS, namely the distance information of the navigation source.
In some possible embodiments, based on the foregoing solution, obtaining the altitude information of the navigation source based on the PPLI information sent by the navigation source includes:
and decoding the PPLI information to obtain the air pressure height of the navigation source as the height information of the navigation source.
In some possible embodiments, based on the foregoing technical solution, obtaining the relative location quality, the time quality, and the geographic location quality based on the PPLI information sent by the navigation source includes:
and decoding the PPLI information to obtain the relative position quality, the time quality and the geographic position quality of the navigation source.
By way of example, with continued reference to fig. 3, based on the foregoing example, after the signal processing is completed in the JTIDS terminal in the B aircraft, the digital signal after the signal processing is completed completes the information demodulation, and a PPLI message of the a aircraft may be obtained, where the data items in the PPLI message include the a aircraft: relative positional massTime quality->Geographic location quality->Air pressure height->。
With continued reference to fig. 1, step S200 determines whether the navigation source meets a distance difference requirement based on the distance information.
It can be understood that in the selection logic of the navigation source, it should be determined whether the navigation source meets the distance difference requirement, then whether the navigation source meets the height difference requirement, and finally whether the navigation source meets the quality requirement.
In some possible embodiments, based on the foregoing solution, the determining, based on the location information, whether the navigation source meets a distance difference requirement includes:
determining a distance difference between the navigation source and the signal receiving user based on the distance information;
and comparing the distance difference with a preset distance threshold, if the distance difference is larger than the distance threshold, judging that the navigation source meets the distance difference requirement, otherwise, not meeting the distance difference requirement.
It is understood that the distance information indicates a distance between the navigation source and the signal receiving user, and the specific value of the distance is the distance difference when the signal receiving user is taken as a zero point.
For example, with continued reference to fig. 2, comparing the distance difference between the a-plane and the B-plane with a preset distance threshold, and when the distance difference is greater than the preset distance threshold, considering that the a-plane is far enough away from the B-plane, meeting the distance difference requirement, and entering the next-stage altitude difference requirement judgment; when the distance difference is smaller than or equal to a preset distance threshold, the aircraft A is considered to be too close to the aircraft B, the distance difference is equivalent to the distance measurement error, the distance difference requirement is not met, the test of the current navigation source is directly stopped, and the navigation source is not adopted. In the process of judging whether the navigation source meets the distance difference requirement, a preset distance threshold is selected as JTIDS ranging error 50m according to experience.
With continued reference to fig. 1, in step S300, if the navigation source meets the distance difference requirement, it is determined whether the navigation source meets the height difference requirement based on the height information.
It will be appreciated that, according to the selection logic of the navigation source, the altitude difference requirement determination should be performed after the distance difference requirement determination is completed.
In some possible embodiments, based on the foregoing solution, the determining, based on the altitude information, whether the navigation source meets an altitude difference requirement includes:
determining a height difference between the navigation source and the signal receiving user based on the height information and the height of the signal receiving user;
and comparing the height difference with a preset height difference threshold, and if the height difference is larger than the preset height difference threshold, judging that the navigation source meets the height difference requirement, otherwise, not meeting the height difference requirement.
It will be appreciated that the height of the signal receiving user itself may be determined by a system that the user is self-contained in, for example an atmospheric data system.
Exemplary, with continued reference to FIG. 3, based on the foregoing example, the barometric altitude of aircraft A is taken from the PPLI information in aircraft AAs the current altitude of the A plane, the air pressure altitude of the B plane is acquired by utilizing an air data system in the B plane>As the current altitude of the B aircraft, when +.>When the height difference is larger than the preset height difference threshold value, the height difference between the aircraft A and the aircraft B is considered to be large enough, the height difference requirement is met, and the next-stage quality requirement judgment can be carried out; when->When the height difference is smaller than the preset height difference threshold value, the vertical distance between the plane A and the plane B is considered to be too small, the height difference is equivalent to the measurement error of the atmospheric data system, the height difference requirement is not met, the test of the current navigation source is directly stopped, and the preset height difference threshold value in the height difference requirement judging process is selected as the height measurement error 50m of the atmospheric data system according to experience.
With continued reference to fig. 1, in step S400, if the navigation source meets the altitude difference requirement, it is determined whether the navigation source meets the quality requirement based on the relative position quality, the time quality and the geographic position quality of the navigation source.
It can be appreciated that, according to the selection logic of the navigation source, after the determination of the altitude difference requirement is completed, the determination of the quality requirement should be performed finally.
In some possible embodiments, based on the foregoing solution, the determining whether the navigation source meets the quality requirement based on the relative position quality, the time quality, and the geographic position quality of the navigation source includes:
acquiring the relative position quality and the geographic position quality of the signal receiving user;
judging whether the navigation source meets the first-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the requirement of a secondary quality grade or not based on the relative position quality and time quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the three-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
and if the navigation source meets the first-level quality level requirement, the second-level quality level requirement or the third-level quality level requirement, judging that the navigation source meets the quality requirement.
It will be appreciated that a navigation source meets quality requirements when it meets any one of three quality level requirements.
Exemplary, based on the foregoing examples, obtaining a relative positional mass of an A-planeTime quality->Geographic location quality->Relative positional mass of B aircraft>Geographic location quality->。
If the geographic position quality of the navigation sourceIs greater than the geographical location quality of the signal receiving user>Time quality of the navigation source +.>Is greater than the geographical location quality of the signal receiving user>And the geographical location quality of the navigation source +.>Greater than the relative position mass of the navigation source>I.e. +.>、/>And +.>When the navigation source meets the first-level quality grade requirement, judging that the navigation source meets the first-level quality grade requirement; otherwise, judging that the navigation source does not meet the first-level quality grade requirement, and further continuing to perform second-level judgment;
if the relative position quality of the navigation sourceGreater than the relative position quality of the signal receiving user>Time of the navigation source +.>The quality is greater than the relative position quality of the signal receiving user>And the relative position mass of the navigation source +.>Is greater than the geographical location quality of the signal receiving user>I.e. +.>、/>Andjudging that the navigation source meets the secondary quality requirement; otherwise, judging that the navigation source does not meet the requirement of the secondary quality grade, and continuing to perform tertiary judgment;
if the relative position quality of the navigation sourceGeographical location quality of said navigation source +.>And the relative position quality of the signal receiving users +.>Are all greater than the geographical location quality of the signal receiving user>Or the relative position quality of the navigation source +.>Geographical location quality of said navigation source +.>And the relative location quality of the signal receiving usersAre all larger than the relative position quality of the signal receiving users>I.e. +.>、/>And->Or->、/>And->When the navigation source meets the three-level quality requirement, judging that the navigation source meets the three-level quality requirement; otherwise, judging that the navigation source does not meet the three-level quality grade requirement, and stopping judging.
With continued reference to fig. 1, in step S500, if the navigation source meets the quality requirement, the navigation source is selected.
It will be appreciated that when the navigation source meets all the requirements, it is indicated that the navigation source is the current best choice.
In some possible embodiments, based on the foregoing, after completing the navigation source selection, further comprising:
and updating navigation information of the signal receiving user based on the navigation source.
It can be appreciated that navigation information fusion is required when the navigation source meets the requirements.
In some possible embodiments, based on the foregoing solution, the updating the navigation information of the signal receiving user includes:
updating the geographic pseudo range of the signal receiving user based on the navigation source when the navigation source meets the first-level quality level requirement;
updating the grid pseudo range of the signal receiving user based on the navigation source when the navigation source meets the requirement of the secondary quality grade;
and updating the grid bias of the signal receiving user based on the navigation source when the navigation source meets the three-level quality level requirement.
The following describes an embodiment of an apparatus of the present application, which may be used to perform a navigation source selection method in the above-described embodiments of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the method described in the present application.
Referring to fig. 4, a navigation source selecting apparatus according to an embodiment of the present application includes: an acquisition unit 401, a first judgment unit 402, a second judgment unit 403, a third judgment unit 404, and a selection unit 405.
Wherein, the obtaining unit 401 is configured to obtain distance information, altitude information, relative position quality, time quality and geographic position quality of a navigation source based on PPLI information sent by the navigation source; a first judging unit 402, configured to judge whether the navigation source meets a distance difference requirement based on the distance information; a second judging unit 403, configured to judge whether the navigation source meets a level difference requirement based on the level information; a third judging unit 404, configured to judge whether the navigation source meets a quality requirement based on the relative position quality, the time quality, and the geographic position quality of the navigation source; a selection unit 405 for selecting a navigation source that meets the distance difference requirement, the altitude difference requirement, and the quality requirement.
In some possible embodiments, based on the foregoing scheme, the obtaining unit 401 includes: the first acquisition subunit is used for detecting the arrival time of the PPLI information by utilizing a JTIDS system after the signal receiving user receives the PPLI information, and determining the distance information of the navigation source based on the arrival time; the second acquisition subunit is used for decoding the PPLI information to acquire the air pressure height of the navigation source as the height information of the navigation source; and the third acquisition subunit is used for decoding the PPLI information to acquire the relative position quality, the time quality and the geographic position quality of the navigation source.
In some possible embodiments, based on the foregoing solution, the first determining unit 402 is configured to:
determining a distance difference between the navigation source and the signal receiving user based on the distance information;
and comparing the distance difference with a preset distance threshold, if the distance difference is larger than the distance threshold, judging that the navigation source meets the distance difference requirement, otherwise, not meeting the distance difference requirement.
In some possible embodiments, based on the foregoing solution, the second determining unit 403 is configured to:
determining a height difference between the navigation source and the signal receiving user based on the height information and the height of the signal receiving user;
and comparing the height difference with a preset height difference threshold, and if the height difference is larger than the preset height difference threshold, judging that the navigation source meets the height difference requirement, otherwise, not meeting the height difference requirement.
In some possible embodiments, based on the foregoing solution, the third determining unit 404 is configured to:
acquiring the relative position quality and the geographic position quality of the signal receiving user;
judging whether the navigation source meets the first-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the requirement of a secondary quality grade or not based on the relative position quality and time quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the three-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
and if the navigation source meets the first-level quality level requirement, the second-level quality level requirement or the third-level quality level requirement, judging that the navigation source meets the quality requirement.
In some possible embodiments, based on the foregoing, the apparatus 400 further includes: and the updating unit is used for updating the navigation information of the signal receiving user based on the navigation source.
In some possible embodiments, based on the foregoing scheme, the updating unit is configured to:
updating the geographic pseudo range of the signal receiving user based on the navigation source when the navigation source meets the first-level quality level requirement;
updating the grid pseudo range of the signal receiving user based on the navigation source when the navigation source meets the requirement of the secondary quality grade;
and updating the grid bias of the signal receiving user based on the navigation source when the navigation source meets the three-level quality level requirement.
As shown in fig. 5, the embodiment of the present application further provides an electronic device 500, including a memory 510, a processor 520, and a computer program 511 stored in the memory 510 and capable of running on the processor, where the processor 520 implements a navigation source selection method as described above when executing the computer program 511.
Since the electronic device described in this embodiment is a device for implementing a navigation source selecting apparatus in this embodiment, based on the method described in this embodiment, those skilled in the art can understand the specific implementation manner of the electronic device and various modifications thereof, so how to implement the method in this embodiment for this electronic device will not be described in detail herein, and as long as those skilled in the art implement the device for implementing the method in this embodiment for this purpose, the device is within the scope of protection intended by this application.
Fig. 6 shows a schematic diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application.
It should be noted that, the computer system 600 of the electronic device shown in fig. 6 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.
As shown in fig. 6, the computer system 600 includes a central processing unit (Central Processing Unit, CPU) 601, which can perform various appropriate actions and processes according to a program stored in a Read-Only Memory (ROM) 602 or a program loaded from a storage section 608 into a random access Memory (Random Access Memory, RAM) 603, for example, performing the method described in the above embodiment. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, ROM 602, and RAM 603 are connected to each other through a bus 604. An Input/Output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, mouse, etc.; an output portion 607 including a Cathode Ray Tube (CRT), a liquid crystal display (Liquid Crystal Display, LCD), and a speaker, etc.; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a LAN (Local Area Network ) card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The drive 610 is also connected to the I/O interface 605 as needed. Removable media 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed as needed on drive 610 so that a computer program read therefrom is installed as needed into storage section 608.
In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network through the communication portion 609, and/or installed from the removable medium 611. When executed by a Central Processing Unit (CPU) 601, performs the various functions defined in the system of the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present application may be implemented by means of software, or may be implemented by means of hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
As another aspect, the present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from a computer-readable storage medium, and the processor executes the computer instructions so that the computer device performs a navigation source selection method as described in the above embodiments
As another aspect, the present application also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer-readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to implement a navigation source selection method as described in the above embodiments.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit, in accordance with embodiments of the present application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a usb disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a touch terminal, or a network device, etc.) to perform the method according to the embodiments of the present application.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (9)
1. A navigation source selection method applied to a signal receiving user provided with a JTIDS system, comprising:
acquiring distance information, altitude information, relative position quality, time quality and geographic position quality of a navigation source based on PPLI information sent by the navigation source;
judging whether the navigation source meets the distance difference requirement or not based on the distance information;
if yes, judging whether the navigation source meets the height difference requirement or not based on the height information;
if yes, judging whether the navigation source meets the quality requirement or not based on the relative position quality, the time quality and the geographic position quality of the navigation source;
if yes, selecting the navigation source;
the determining whether the navigation source meets the quality requirement based on the relative position quality, the time quality and the geographic position quality of the navigation source comprises the following steps:
acquiring the relative position quality and the geographic position quality of the signal receiving user;
judging whether the navigation source meets the first-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the requirement of a secondary quality grade or not based on the relative position quality and time quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the three-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
and if the navigation source meets the first-level quality level requirement, the second-level quality level requirement or the third-level quality level requirement, judging that the navigation source meets the quality requirement.
2. The method of claim 1, wherein obtaining distance information for a navigation source based on PPLI information sent by the navigation source comprises:
when the signal receiving user receives the PPLI information, detecting the arrival time of the PPLI information by using a JTIDS system;
distance information of the navigation source is determined based on the arrival time.
3. The method according to claim 1 or 2, wherein said determining whether the navigation source meets a distance difference requirement based on the distance information comprises:
determining a distance difference between the navigation source and the signal receiving user based on the distance information;
and comparing the distance difference with a preset distance threshold, if the distance difference is larger than the distance threshold, judging that the navigation source meets the distance difference requirement, otherwise, not meeting the distance difference requirement.
4. The method of claim 1, wherein obtaining altitude information for a navigation source based on PPLI information sent by the navigation source comprises:
and decoding the PPLI information to obtain the air pressure height of the navigation source as the height information of the navigation source.
5. The method of claim 1 or 4, wherein said determining whether the navigation source meets a level difference requirement based on the level information comprises:
determining a height difference between the navigation source and the signal receiving user based on the height information and the height of the signal receiving user;
and comparing the height difference with a preset height difference threshold, and if the height difference is larger than the preset height difference threshold, judging that the navigation source meets the height difference requirement, otherwise, not meeting the height difference requirement.
6. The method of claim 1, wherein obtaining the relative location quality, the time quality, and the geographic location quality based on the PPLI information sent by the navigation source comprises:
and decoding the PPLI information to obtain the relative position quality, the time quality and the geographic position quality of the navigation source.
7. The method of claim 1, further comprising, after completing the navigation source selection:
and updating navigation information of the signal receiving user based on the navigation source.
8. The method of claim 7, wherein the updating the navigation information of the signal receiving user comprises:
updating the geographic pseudo range of the signal receiving user based on the navigation source when the navigation source meets the first-level quality level requirement;
updating the grid pseudo range of the signal receiving user based on the navigation source when the navigation source meets the requirement of the secondary quality grade;
and updating the grid bias of the signal receiving user based on the navigation source when the navigation source meets the three-level quality level requirement.
9. A navigation source selection device applied to a signal receiving user provided with a JTIDS system, comprising:
the acquisition unit is used for acquiring distance information, height information, relative position quality, time quality and geographic position quality of the navigation source based on the PPLI information sent by the navigation source;
the first judging unit is used for judging whether the navigation source meets the distance difference requirement or not based on the distance information;
the second judging unit is used for judging whether the navigation source meets the height difference requirement or not based on the height information;
the third judging unit is used for judging whether the navigation source meets the quality requirement or not based on the relative position quality, the time quality and the geographic position quality of the navigation source;
the selection unit is used for selecting a navigation source which meets the distance difference requirement, the height difference requirement and the quality requirement;
wherein the determining whether the navigation source meets the quality requirement based on the relative position quality, the time quality and the geographic position quality of the navigation source comprises:
acquiring the relative position quality and the geographic position quality of the signal receiving user;
judging whether the navigation source meets the first-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the requirement of a secondary quality grade or not based on the relative position quality and time quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
if yes, judging whether the navigation source meets the three-level quality grade requirement or not based on the relative position quality, time quality and geographic position quality of the navigation source and the relative position quality and geographic position quality of the signal receiving user;
and if the navigation source meets the first-level quality level requirement, the second-level quality level requirement or the third-level quality level requirement, judging that the navigation source meets the quality requirement.
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