CN111835397B - Remote sensing satellite encodable adjustment function test method and system - Google Patents
Remote sensing satellite encodable adjustment function test method and system Download PDFInfo
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Abstract
The application discloses a method and a system for testing a variable coding modulation function of a remote sensing satellite, wherein the method comprises the following steps: establishing a channel transmission model of the remote sensing satellite, and simulating and transmitting a variable coding modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable coding modulation signal; determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to an initial attenuation value and an initial signal-to-noise ratio of a channel transmission model and a first variable coding modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result; receiving the on-orbit running state information sent by the remote sensing satellite, generating a second variable code modulation signal according to the on-orbit running state information in a simulation mode, comparing the variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result. The application solves the technical problems of poor test effect and efficiency in the prior art.
Description
Technical Field
The application relates to the technical field of testing of variable coding modulation functions of remote sensing satellites, in particular to a method and a system for testing the variable coding modulation functions of the remote sensing satellites.
Background
The variable code modulation function is a technique that enables different sites and different services to use different coding and modulation schemes on a shared carrier. In order to enable the satellite to efficiently utilize the signal transmission channel in the in-orbit operation process, the modulation technology is applied to the remote sensing satellite for the first time, and the signal transmission channel is efficiently utilized by calculating the radial distance between the satellite-borne antenna and the tracked ground station in real time and adopting different modulation modes at different radial distances in the in-orbit operation process of the satellite. In order to detect the effect of the remote sensing satellite variable code modulation function, a method and a system for testing the remote sensing satellite variable code modulation function need to be provided to verify the correctness of the function.
At present, for a method and a system for testing the variable code modulation function of a remote measurement satellite, on one hand, no equipment capable of demodulating the variable code modulation signal exists in China; on the other hand, the foreign test system only has the functions of demodulating and simply modulating signals, so that real signals on the remote sensing satellite cannot be simulated, the automation degree is low, and the test effect and efficiency are poor.
Disclosure of Invention
The technical problem that this application was solved is: aiming at the problems of poor testing effect and poor efficiency in the prior art, the application provides a method and a system for testing the variable coding modulation function of the remote sensing satellite.
In a first aspect, an embodiment of the present application provides a method for testing a variable coding modulation function of a remote sensing satellite, where the method includes:
establishing a channel transmission model of a remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, and simulating and transmitting a variable coding modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable coding modulation signal;
determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result;
receiving the on-orbit running state information sent by the remote sensing satellite, generating a second variable coding modulation signal according to the on-orbit running state information in a simulation mode, comparing the variable coding modulation signal sent by the remote sensing satellite with the second variable coding modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result.
In the scheme provided by the embodiment of the application, an initial attenuation value and an initial signal-to-noise ratio in a channel transmission model are determined by establishing the channel transmission model of a remote sensing satellite, a variable coding modulation signal sent by the remote sensing satellite is simulated and transmitted according to the channel transmission model to obtain a first variable coding modulation signal, then a change rule of a channel error rate along with the signal-to-noise ratio is determined according to the initial attenuation value, the initial signal-to-noise ratio and the first variable coding modulation signal, the change rule is compared with a preset expected change rule to obtain a first comparison result, in-orbit running state information sent by the remote sensing satellite is received, a second variable coding modulation signal is simulated and generated according to the in-orbit running state information, the first variable coding modulation signal and the second variable coding modulation signal are compared to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result. Therefore, according to the scheme provided by the embodiment of the application, the signal transmission function of the remote sensing satellite is simulated by establishing the channel transmission model of the remote sensing satellite, and the operation of the remote sensing satellite is simulated according to the on-orbit operation state information sent by the remote sensing satellite, so that the simulation of the function of the remote sensing satellite simulated remote sensing satellite based on the actual information on the remote sensing satellite is realized, the test degree is improved, the test effect is improved, and the efficiency is poor.
In one possible implementation manner, determining a variation law of a channel bit error rate with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio, and the first variable code modulation signal includes:
determining a first bit error rate of the channel transmission model according to the first variable code modulation signal and the variable code modulation signal;
judging whether the first error rate is returned to 0;
if so, generating a first control instruction, adjusting the initial signal-to-noise ratio according to the first control instruction to obtain an adjusted signal-to-noise ratio, determining a second error rate of the channel transmission model according to the adjusted signal-to-noise ratio and the first variable coding modulation signal until the second error rate is smaller than a preset threshold value, and determining a change rule of the channel error rate along with the signal-to-noise ratio according to the adjusted signal-to-noise ratio and the second error rate.
In one possible implementation manner, if the first error rate does not return to 0, a second control instruction is generated, the initial attenuation value is adjusted according to the second control instruction, an adjusted attenuation value is obtained, and a third error rate of the channel transmission model is determined according to the adjusted attenuation value and the first variable coded modulation signal until the third error rate returns to 0.
In one possible implementation manner, the generating a second variable code modulation signal according to the on-track running state information simulation includes:
simulating a motion trail of a remote sensing satellite according to the in-orbit running state information, and determining the radial distance of the satellite to the ground of each position in the motion trail of the remote sensing satellite;
and generating the second variable code modulation signal according to the satellite-ground radial distance and the mapping relation between the preset satellite-ground radial distance and the code modulation mode in a simulation mode.
In one possible implementation, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model includes:
receiving a noise parameter sent by a noise source and an attenuation parameter sent by a receiving attenuator;
determining the initial attenuation value in the channel transmission model according to the attenuation parameter, and determining the initial signal-to-noise ratio in the channel transmission model according to the noise parameter.
In one possible implementation, the method further includes: and displaying the test report in a text message, an image or a voice form.
In a second aspect, an embodiment of the present application provides a system for testing a remote sensing satellite variable coding modulation function, where the system includes: an attenuator, a noise source, and a computer device; wherein the content of the first and second substances,
the attenuator is used for generating an attenuation parameter and sending the attenuation parameter to the computer equipment;
the noise source is used for generating a noise parameter and sending the noise parameter to the computer equipment;
the computer equipment is used for establishing a channel transmission model of the remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model according to the attenuation parameter and the noise parameter, and simulating and transmitting a variable code modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable code modulation signal; determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result; receiving the on-orbit running state information sent by the remote sensing satellite, generating a second variable coding modulation signal according to the on-orbit running state information in a simulation mode, comparing the variable coding modulation signal sent by the remote sensing satellite with the second variable coding modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result.
In one possible implementation, the computer device includes: the system comprises an analysis module, an evaluation module and a verification module; wherein the content of the first and second substances,
the analysis module is used for receiving the variable coding modulation signal and the on-orbit running state information sent by the remote sensing satellite;
the evaluation module is used for establishing a channel transmission model of a remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, simulating and transmitting a variable coding modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable coding modulation signal, determining a change rule of a channel error rate along with the signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable coding modulation signal, receiving on-orbit running state information sent by the remote sensing satellite, and simulating and generating a second variable coding modulation signal according to the on-orbit running state information;
the verification module is used for comparing the change rule with a preset expected change rule to obtain a first comparison result, comparing a variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result
In a third aspect, an embodiment of the present application provides a device for testing a variable coding modulation function of a remote sensing satellite, where the device includes:
the system comprises an establishing unit, a receiving unit and a processing unit, wherein the establishing unit is used for establishing a channel transmission model of the remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, and simulating and transmitting a variable code modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable code modulation signal;
the determining unit is used for determining a change rule of the channel bit error rate along with the signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable coding modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result;
the generating unit is used for receiving the on-orbit running state information sent by the remote sensing satellite, generating a second variable code modulation signal according to the on-orbit running state information in a simulation mode, comparing the variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result.
In a possible implementation manner, the determining unit is specifically configured to:
determining a first bit error rate of the channel transmission model according to the first variable code modulation signal and the variable code modulation signal;
judging whether the first error rate is returned to 0;
if so, generating a first control instruction, adjusting the initial signal-to-noise ratio according to the first control instruction to obtain an adjusted signal-to-noise ratio, determining a second error rate of the channel transmission model according to the adjusted signal-to-noise ratio and the first variable coding modulation signal until the second error rate is smaller than a preset threshold value, and determining a change rule of the channel error rate along with the signal-to-noise ratio according to the adjusted signal-to-noise ratio and the second error rate.
In one possible implementation manner, the determining unit generates a second control command if the first error rate does not return to 0, adjusts the initial attenuation value according to the second control command to obtain an adjusted attenuation value, and determines a third error rate of the channel transmission model according to the adjusted attenuation value and the first variable coded modulation signal until the third error rate returns to 0.
In a possible implementation manner, the generating unit is specifically configured to:
simulating a motion trail of a remote sensing satellite according to the in-orbit running state information, and determining the radial distance of the satellite to the ground of each position in the motion trail of the remote sensing satellite;
and generating the second variable code modulation signal according to the satellite-ground radial distance and the mapping relation between the preset satellite-ground radial distance and the code modulation mode in a simulation mode.
In a possible implementation manner, the determining unit is specifically configured to:
receiving a noise parameter sent by a noise source and an attenuation parameter sent by a receiving attenuator;
determining the initial attenuation value in the channel transmission model according to the attenuation parameter, and determining the initial signal-to-noise ratio in the channel transmission model according to the noise parameter.
In a possible implementation manner, the device further comprises a display unit; the display unit is specifically configured to: and displaying the test report in a text message, an image or a voice form.
In a fourth aspect, the present application provides a computer device, comprising:
a memory for storing instructions for execution by at least one processor;
a processor for executing instructions stored in a memory to perform the method of the first aspect.
In a fifth aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect.
Drawings
Fig. 1 is a schematic structural diagram of a remote sensing satellite variable coding modulation function test system according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a method for testing a variable coding modulation function of a remote sensing satellite according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a device for testing a variable coding modulation function of a remote sensing satellite according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a device for testing a variable coding modulation function of a remote sensing satellite according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, an embodiment of the present application provides a remote sensing satellite variable code modulation function test system, including: attenuator 1, noise source 2, and computer device 3; wherein the content of the first and second substances,
the attenuator 1 is configured to generate an attenuation parameter and send the attenuation parameter to the computer device 3;
the noise source 2 is configured to generate a noise parameter and send the noise parameter to the computer device 3;
the computer device 3 is configured to establish a channel transmission model of the remote sensing satellite, determine an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model according to the attenuation parameter and the noise parameter, and simulate and transmit a variable code modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable code modulation signal; determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result; receiving the on-orbit running state information sent by the remote sensing satellite, generating a second variable coding modulation signal according to the on-orbit running state information in a simulation mode, comparing the variable coding modulation signal sent by the remote sensing satellite with the second variable coding modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result.
In a possible implementation, the computer device 3 comprises: an analysis module 31, an evaluation module 32 and a verification module 33; wherein the content of the first and second substances,
the analysis module 31 is configured to receive a variable code modulation signal and on-orbit running state information sent by a remote sensing satellite;
the evaluation module 32 is configured to establish a channel transmission model of a remote sensing satellite, determine an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, obtain a first variable coding modulation signal according to a variable coding modulation signal sent by the remote sensing satellite through simulated transmission of the channel transmission model, determine a change rule of a channel error rate along with the signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable coding modulation signal, receive in-orbit running state information sent by the remote sensing satellite, and generate a second variable coding modulation signal according to the in-orbit running state information through simulated transmission;
the verification module 33 is configured to compare the change rule with a preset expected change rule to obtain a first comparison result, compare the variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generate a test report according to the first comparison result and the second comparison result.
The method for testing the remote sensing satellite variable coding modulation function provided by the embodiment of the present application is described in further detail below with reference to the drawings in the specification, and is applied to the system described in fig. 1, and a specific implementation manner of the method may include the following steps (a method flow is shown in fig. 2):
step 201, establishing a channel transmission model of a remote sensing satellite, setting an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, and simulating and transmitting a variable code modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable code modulation signal.
Specifically, in the scheme provided in the embodiment of the present application, a mapping relationship between a satellite-to-ground radial distance and a signal coding modulation mode is stored in advance in a database of the remote sensing satellite, where the satellite-to-ground radial distance refers to a radial distance between a satellite-borne antenna and a ground station, and during an orbiting motion of the remote sensing satellite, the satellite-to-ground radial distance of each position in an operating radian of the remote sensing satellite is determined in real time, and a signal of the remote sensing satellite is subjected to variable coding modulation according to the satellite-to-ground radial distance and the mapping relationship between the preset satellite-to-ground radial distance and the signal coding modulation mode, so as to obtain a variable coding modulation signal.
Further, the channel parameters of the remote sensing satellite are stored in a database of the computer device in advance, and a channel transmission model of the remote sensing satellite is established according to the channel parameters, wherein the channel transmission model is used for simulating signal transmission of the remote sensing satellite. After the computer equipment establishes a channel transmission model of the remote sensing satellite, an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model are determined. Specifically, in the solution provided in the embodiment of the present application, there are various ways to determine the initial attenuation value and the initial snr in the channel transmission model, and a preferred way is described as an example below.
In one possible implementation, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model includes:
receiving a noise parameter sent by a noise source and an attenuation parameter sent by a receiving attenuator;
and determining an initial attenuation value in the channel transmission model according to the attenuation parameter, and determining an initial signal-to-noise ratio in the channel transmission model according to the noise parameter.
Further, after establishing a channel transmission model and setting an initial attenuation value and an initial signal-to-noise ratio, the computer device receives a variable code modulation signal sent by the telemetry satellite, and simulates and transmits the variable code modulation signal in the channel transmission model to obtain a first variable code modulation signal. It should be understood that, in the solution provided in the embodiments of the present application, the computer device may be a server, a computer, or other devices with data processing, and is not limited herein.
Step 202, determining a change rule of the channel bit error rate along with the signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result.
In one possible implementation manner, determining a variation law of a channel bit error rate with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio, and the first variable code modulation signal includes: determining a first bit error rate of the channel transmission model according to the first variable code modulation signal and the variable code modulation signal; judging whether the first error rate is returned to 0; if so, generating a first control instruction, adjusting the initial signal-to-noise ratio according to the first control instruction to obtain an adjusted signal-to-noise ratio, determining a second error rate of the channel transmission model according to the adjusted signal-to-noise ratio and the first variable coding modulation signal until the second error rate is smaller than a preset threshold value, and determining a change rule of the channel error rate along with the signal-to-noise ratio according to the adjusted signal-to-noise ratio and the second error rate.
Further, in a possible implementation manner, if the first error rate does not return to 0, a second control instruction is generated, the initial attenuation value is adjusted according to the second control instruction to obtain an adjusted attenuation value, and a third error rate of the channel transmission model is determined according to the adjusted attenuation value and the first variable coded modulation signal until the third error rate returns to 0.
Step 203, receiving the in-orbit running state information sent by the remote sensing satellite, generating a second variable code modulation signal according to the in-orbit running state information in a simulation mode, comparing the variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result.
Specifically, in the scheme provided by the embodiment of the application, the in-orbit running state information includes a running track, running parameters, attitude parameters and the like of the remote sensing satellite. There are various ways for the computer device to generate the second variable code modulation signal according to the on-track running state information, and a preferred way is described as an example below.
In one possible implementation manner, the generating a second variable code modulation signal according to the on-track running state information simulation includes: simulating a motion trail of a remote sensing satellite according to the in-orbit running state information, and determining the radial distance of the satellite to the ground of each position in the motion trail of the remote sensing satellite; and generating the second variable code modulation signal according to the satellite-ground radial distance and the mapping relation between the preset satellite-ground radial distance and the code modulation mode in a simulation mode.
Further, in order to improve the experience effect of the user, in the solution provided in the embodiment of the present application, the method further includes: and displaying the test report in a text message, an image or a voice form.
In the scheme provided by the embodiment of the application, an initial attenuation value and an initial signal-to-noise ratio in a channel transmission model are determined by establishing the channel transmission model of a remote sensing satellite, a variable coding modulation signal sent by the remote sensing satellite is simulated and transmitted according to the channel transmission model to obtain a first variable coding modulation signal, then a change rule of a channel error rate along with the signal-to-noise ratio is determined according to the initial attenuation value, the initial signal-to-noise ratio and the first variable coding modulation signal, the change rule is compared with a preset expected change rule to obtain a first comparison result, in-orbit running state information sent by the remote sensing satellite is received, a second variable coding modulation signal is simulated and generated according to the in-orbit running state information, the first variable coding modulation signal and the second variable coding modulation signal are compared to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result. Therefore, according to the scheme provided by the embodiment of the application, the signal transmission function of the remote sensing satellite is simulated by establishing the channel transmission model of the remote sensing satellite, and the operation of the remote sensing satellite is simulated according to the on-orbit operation state information sent by the remote sensing satellite, so that the simulation of the function of the remote sensing satellite simulated remote sensing satellite based on the actual information on the remote sensing satellite is realized, the test degree is improved, the test effect is improved, and the efficiency is poor.
Based on the same inventive concept as the method shown in fig. 2, an embodiment of the present application provides a device for testing a variable coding modulation function of a remote sensing satellite, where the device includes:
the establishing unit 301 is configured to establish a channel transmission model of a remote sensing satellite, determine an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, and simulate and transmit a variable code modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable code modulation signal;
a determining unit 302, configured to determine a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio, and the first variable coded modulation signal, and compare the change rule with a preset expected change rule to obtain a first comparison result;
the generating unit 303 is configured to receive the in-orbit running state information sent by the remote sensing satellite, generate a second variable code modulation signal according to the in-orbit running state information in a simulation manner, compare the variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generate a test report according to the first comparison result and the second comparison result.
In a possible implementation manner, the determining unit 302 is specifically configured to:
determining a first bit error rate of the channel transmission model according to the first variable code modulation signal and the variable code modulation signal;
judging whether the first error rate is returned to 0;
if so, generating a first control instruction, adjusting the initial signal-to-noise ratio according to the first control instruction to obtain an adjusted signal-to-noise ratio, determining a second error rate of the channel transmission model according to the adjusted signal-to-noise ratio and the first variable coding modulation signal until the second error rate is smaller than a preset threshold value, and determining a change rule of the channel error rate along with the signal-to-noise ratio according to the adjusted signal-to-noise ratio and the second error rate.
In one possible implementation manner, if the first error rate does not return to 0, the determining unit 302 generates a second control command, adjusts the initial attenuation value according to the second control command to obtain an adjusted attenuation value, and determines a third error rate of the channel transmission model according to the adjusted attenuation value and the first variable coded modulation signal until the third error rate returns to 0.
In a possible implementation manner, the generating unit 303 is specifically configured to:
simulating a motion trail of a remote sensing satellite according to the in-orbit running state information, and determining the radial distance of the satellite to the ground of each position in the motion trail of the remote sensing satellite;
and generating the second variable code modulation signal according to the satellite-ground radial distance and the mapping relation between the preset satellite-ground radial distance and the code modulation mode in a simulation mode.
In a possible implementation manner, the determining unit 301 is specifically configured to:
receiving a noise parameter sent by a noise source and an attenuation parameter sent by a receiving attenuator;
determining the initial attenuation value in the channel transmission model according to the attenuation parameter, and determining the initial signal-to-noise ratio in the channel transmission model according to the noise parameter.
In one possible implementation, referring to fig. 4, the apparatus further includes a presentation unit 304; the display unit 304 is specifically configured to: and displaying the test report in a text message, an image or a voice form.
Referring to fig. 5, an embodiment of the present application provides a computer device, including:
a memory 501 for storing instructions for execution by at least one processor;
a processor 502 for executing instructions stored in memory to perform the method described in fig. 2.
Embodiments of the present application provide a computer-readable storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the method described in fig. 2.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (7)
1. A method for testing the variable coding modulation function of a remote sensing satellite is characterized by comprising the following steps:
establishing a channel transmission model of a remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, and simulating and transmitting a variable coding modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable coding modulation signal;
determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result;
receiving on-orbit running state information sent by the remote sensing satellite, generating a second variable coding modulation signal according to the on-orbit running state information in a simulation mode, comparing a first variable coding modulation signal and the second variable coding modulation signal sent by the remote sensing satellite to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result;
determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, wherein the change rule comprises the following steps:
determining a first bit error rate of the channel transmission model according to the first variable code modulation signal;
judging whether the first error rate is returned to 0;
if so, generating a first control instruction, adjusting the initial signal-to-noise ratio according to the first control instruction to obtain an adjusted signal-to-noise ratio, determining a second error rate of the channel transmission model according to the adjusted signal-to-noise ratio and the first variable coding modulation signal until the second error rate is smaller than a preset threshold value, and determining a change rule of the channel error rate along with the signal-to-noise ratio according to the adjusted signal-to-noise ratio and the second error rate.
2. The method of claim 1, wherein if the first error rate is not returned to 0, generating a second control command, adjusting the initial attenuation value according to the second control command to obtain an adjusted attenuation value, and determining a third error rate of the channel transmission model according to the adjusted attenuation value and the first variable coded modulation signal until the third error rate is returned to 0.
3. The method of claim 1, wherein simulating generation of a second variably coded modulated signal based on the on-track running state information comprises:
simulating a motion trail of a remote sensing satellite according to the in-orbit running state information, and determining the radial distance of the satellite to the ground of each position in the motion trail of the remote sensing satellite;
and generating the second variable code modulation signal according to the satellite-ground radial distance and the mapping relation between the preset satellite-ground radial distance and the code modulation mode in a simulation mode.
4. The method of any of claims 1 to 3, wherein determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model comprises:
receiving a noise parameter sent by a noise source and an attenuation parameter sent by a receiving attenuator;
determining the initial attenuation value in the channel transmission model according to the attenuation parameter, and determining the initial signal-to-noise ratio in the channel transmission model according to the noise parameter.
5. The method of any one of claims 1 to 3, further comprising: and displaying the test report in a text message, an image or a voice form.
6. A remote sensing satellite variable coding modulation function test system is characterized by comprising: an attenuator, a noise source, and a computer device; wherein the content of the first and second substances,
the attenuator is used for generating an attenuation parameter and sending the attenuation parameter to the computer equipment;
the noise source is used for generating a noise parameter and sending the noise parameter to the computer equipment;
the computer equipment is used for establishing a channel transmission model of the remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model according to the attenuation parameter and the noise parameter, and simulating and transmitting a variable code modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable code modulation signal; determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, and comparing the change rule with a preset expected change rule to obtain a first comparison result; receiving on-orbit running state information sent by the remote sensing satellite, generating a second variable coding modulation signal according to the on-orbit running state information in a simulation mode, comparing a first variable coding modulation signal and the second variable coding modulation signal sent by the remote sensing satellite to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result; wherein the content of the first and second substances,
determining a change rule of a channel bit error rate along with a signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable code modulation signal, wherein the change rule comprises the following steps:
determining a first bit error rate of the channel transmission model according to the first variable code modulation signal;
judging whether the first error rate is returned to 0;
if so, generating a first control instruction, adjusting the initial signal-to-noise ratio according to the first control instruction to obtain an adjusted signal-to-noise ratio, determining a second error rate of the channel transmission model according to the adjusted signal-to-noise ratio and the first variable coding modulation signal until the second error rate is smaller than a preset threshold value, and determining a change rule of the channel error rate along with the signal-to-noise ratio according to the adjusted signal-to-noise ratio and the second error rate.
7. The system of claim 6,
the computer device includes: the system comprises an analysis module, an evaluation module and a verification module; wherein the content of the first and second substances,
the analysis module is used for receiving the variable coding modulation signal and the on-orbit running state information sent by the remote sensing satellite;
the evaluation module is used for establishing a channel transmission model of a remote sensing satellite, determining an initial attenuation value and an initial signal-to-noise ratio in the channel transmission model, simulating and transmitting a variable coding modulation signal sent by the remote sensing satellite according to the channel transmission model to obtain a first variable coding modulation signal, determining a change rule of a channel error rate along with the signal-to-noise ratio according to the initial attenuation value, the initial signal-to-noise ratio and the first variable coding modulation signal, receiving on-orbit running state information sent by the remote sensing satellite, and simulating and generating a second variable coding modulation signal according to the on-orbit running state information;
the verification module is used for comparing the change rule with a preset expected change rule to obtain a first comparison result, comparing a variable code modulation signal sent by the remote sensing satellite with the second variable code modulation signal to obtain a second comparison result, and generating a test report according to the first comparison result and the second comparison result.
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