CN116388894A - Non-stationary orbit satellite emission EIRP value test method - Google Patents
Non-stationary orbit satellite emission EIRP value test method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/13—Monitoring; Testing of transmitters for calibration of power amplifiers, e.g. gain or non-linearity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
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- H04B7/185—Space-based or airborne stations; Stations for satellite systems
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Abstract
The invention discloses a non-stationary orbit satellite emission EIRP value test method, and relates to the field of satellite tests. Aiming at the problem that the non-stationary orbit satellite and the ground relatively move and the emission EIRP value cannot be subjected to fixed point test, the invention provides a non-stationary orbit satellite emission EIRP value test method. The invention is particularly suitable for testing and verifying the EIRP value of non-stationary orbit satellite transmission, and is also particularly suitable for judging the accuracy of satellite-ground antenna tracking pointing and the stability of a satellite-ground link.
Description
Technical Field
The invention relates to a non-stationary orbit satellite emission EIRP value test method which can be used for testing and verifying the non-stationary orbit satellite emission EIRP value and judging the accuracy of satellite-ground antenna tracking pointing and the stability of a satellite-ground link, and belongs to the field of satellite testing.
Background
With the rapid development of the internet of non-stationary orbit satellites, the number of non-stationary orbit satellites is continuously increased, and the testability of satellite indexes, the accuracy of design and the stability of work are focused on. The non-stationary orbit satellite is different from the high orbit satellite, and has the characteristics of high dynamic state, short time, frequent change relative to the ground orbit and the like. Aiming at the focus of attention and the difficulty in realization, the test method for researching various indexes of the non-stationary orbit satellite is the basis for constructing a stable and reliable non-stationary orbit satellite system.
Disclosure of Invention
The invention aims to avoid the defects in the background art and provides a non-stationary orbit satellite emission EIRP value test method which can test the EIRP value of a beam normal direction and the EIRP value of a beam edge, and can test the satellite whole orbit emission EIRP value and judge the tracking direction and the link state of a satellite-ground antenna in real time. The invention is particularly suitable for testing and verifying the EIRP value of non-stationary orbit satellite transmission, and is also particularly suitable for judging the accuracy of satellite-ground antenna tracking pointing and the stability of a satellite-ground link.
The invention adopts the technical scheme that:
a non-stationary orbit satellite emission EIRP value test method comprises the following steps:
step 1, a ground test station performs gain calibration on a tested frequency band antenna and an LNA channel;
step 2, the operation control center generates a measured non-stationary orbit satellite orbit file, and sends the file to a ground test station and EIRP acquisition and calculation software respectively, and the position coordinates of the selected ground test station are uploaded to the measured non-stationary orbit satellite;
step 3, the tested non-stationary orbit satellite points to the ground test station according to the position coordinates of the ground test station and transmits a single-tone signal with a fixed EIRP value;
step 4, the ground test station tracks the tested non-stationary orbit satellite according to the tested non-stationary orbit satellite orbit file, receives the single-tone signal emitted by the tested non-stationary orbit satellite, and measures the signal level value;
and 5, the EIRP acquisition technology software records the signal level value, and carries out EIRP test result correction by combining the tested non-stationary orbit satellite orbit file sent by the operation control center to finish the test of the non-stationary orbit satellite emission EIRP value.
Further, the specific process of the step 2 is as follows:
step 201, the operation control center calculates the orbit files of the non-stationary orbit satellites to be detected according to six orbits of the non-stationary orbit satellites to be detected, and sends the orbit files of the non-stationary orbit satellites to be detected to a ground test station and EIRP acquisition and calculation software respectively;
and 202, the operation control center selects a receiving ground test station according to the test plan, reads the position coordinates of the ground test station, and annotates the position coordinates of the ground test station on the tested non-stationary orbit satellite.
Further, the specific process of the step 3 is as follows:
step 301, receiving the position coordinates of the ground test station sent by the operation control center by the non-stationary orbit satellite to be tested, and calculating the direction of the transmitting beam of the satellite-borne antenna by combining the position coordinates of the satellite-borne antenna to point to the ground test station;
step 302, the measured non-stationary orbit satellite configures the channel gain and the antenna gain to a linear region, and sets a transmitting signal mode as a single-tone signal;
in step 303, the non-stationary orbiting satellite under test transmits a single tone signal under test to the ground test station during the entire orbit with a fixed gain.
Further, the specific process of the step 4 is as follows:
step 401, a ground test station receives a tested non-stationary orbit satellite orbit file sent by an operation control center, the tested non-stationary orbit satellite orbit file is used as a guide file of an initial tracking stage of a ground test station antenna, and after the ground test station antenna stably receives a signal, a tracking mode is changed from program tracking to automatic tracking;
step 402, setting up the ground test station antenna and LNA, and setting up the radio frequency cable and the frequency spectrograph to be consistent with the calibration;
in step 403, the ground test station sends the signal of the tested non-stationary orbit satellite to the frequency spectrograph for signal level measurement after passing through the ground test station antenna, the LNA and the radio frequency cable.
Further, the specific process of step 5 is as follows:
step 501, EIRP acquisition and calculation software controls a frequency spectrograph to acquire signal level values according to a set time interval, and stores acquisition results into a storage area;
step 502, the EIRP acquisition and calculation software receives a measured non-stationary orbit satellite orbit file sent by an operation control center, and calculates the space loss of the whole orbit of a measured signal in the period of satellite passing according to a set time interval;
in step 503, the EIRP acquisition calculation software calculates eirp=p according to the formula Actual measurement -G Receiving calibration +L Path loss Calculating an EIRP value of the measured non-stationary orbit satellite in the transit period; wherein P is Actual measurement For spectrometer measurement, L Path loss For the space loss of the whole orbit of the measured signal during the passing period of the satellite, G Receiving calibration For a known acquired received calibration value.
Compared with the background technology, the invention has the following advantages:
1. the invention uses the EIRP value testing method of satellite orbit real-time correction, can test the EIRP value of the satellite normal direction and the EIRP value of the beam edge, and can test the EIRP value of the satellite whole orbit emission.
2. The invention can monitor the accuracy of the tracking and pointing of the satellite-ground antenna and the stability of the satellite-ground link.
3. The invention has the capability of automatic test, and the configuration of a test system, the loss correction and the test result do not need human intervention.
Drawings
FIG. 1 is a flowchart of the method of testing the EIRP values of non-stationary orbiting satellites according to the invention.
Detailed Description
The invention is further described with reference to fig. 1 and the specific examples.
The invention relates to a non-stationary orbit satellite emission EIRP value test method which can be used for non-stationary orbit satellite emission EIRP value test and also can be used for monitoring the accuracy of satellite-ground antenna tracking pointing and the stability of a satellite-ground link. As shown in fig. 1, the method comprises the following steps:
step 1, a ground test station calibrates the antenna of a tested frequency band and the gain of an LNA channel through a spectrometer, and before calibration, the attenuation value from the LNA channel to a spectrometer cable is calibrated through the spectrometer;
step 2, the operation control center generates a tested non-stationary orbit satellite orbit file according to six orbits of the satellite, sends the tested non-stationary orbit satellite orbit file to a ground test station and EIRP acquisition and calculation software respectively, and uploads the position coordinates of the selected ground test station to the tested non-stationary orbit satellite; the specific process is as follows:
step 201, before starting a test, the operation control center obtains six orbits of a tested non-stationary orbit satellite, calculates a tested non-stationary orbit satellite orbit file according to the six orbits of the tested non-stationary orbit satellite, and respectively sends the tested non-stationary orbit satellite orbit file to a ground test station and EIRP acquisition and calculation software through a ground wired network;
step 202, before starting the test, making a test plan in advance according to the running condition of the satellite, selecting a receiving ground test station by the operation control center according to the test plan, automatically reading the position coordinates of the ground test station, and uploading the position coordinates of the ground test station to the tested non-stationary orbit satellite through the measurement and control link of the satellite.
Step 3, the tested non-stationary orbit satellite points to the ground test station according to the position coordinates of the ground test station and transmits a single-tone signal with a fixed EIRP value; the specific process is as follows:
step 301, a detected non-stationary orbit satellite receives the position coordinates of a ground test station sent by a control center through a satellite measurement and control link, calculates the direction of a transmitting beam of a satellite-borne antenna according to a specified coordinate system by combining the position coordinates of the satellite-borne antenna, and a comprehensive electronic unit of the satellite controls the satellite-borne antenna to point to the ground test station;
step 302, a comprehensive electronic unit of a measured non-stationary orbit satellite controls channel gain and antenna gain, configures the channel gain and the antenna gain to a linear region, and controls a baseband processing unit to set a transmitting signal mode as a single-tone signal;
in step 303, the non-stationary orbiting satellite under test transmits a single tone signal under test to the ground test station during the entire orbit with a fixed gain.
Step 4, the ground test station tracks the tested non-stationary orbit satellite according to the tested non-stationary orbit satellite orbit file, receives the single-tone signal emitted by the tested non-stationary orbit satellite, and measures the signal level value; the specific process is as follows:
step 401, a ground test station receives a tested non-stationary orbit satellite orbit file sent by a operation control center through a ground wired network, analyzes the tested non-stationary orbit satellite orbit file into a guide file at the initial tracking stage of a ground test station antenna according to a specified protocol, sends the guide file to the ground test station antenna, the guide file has time information, the ground test station antenna determines the starting tracking time according to the time information, and after the ground test station antenna stably receives a signal, the tracking mode is changed from program tracking to automatic tracking;
step 402, setting values of an antenna of a ground test station and an LNA are consistent with those in calibration, and setting the radio frequency cable, namely frequency points, SPAN, VBW, RBW, integral bandwidth and the like of a frequency spectrograph by using the calibrated cable is consistent with those in calibration;
in step 403, the ground test station sends the signal of the tested non-stationary orbit satellite to the frequency spectrograph for signal level measurement after passing through the ground test station antenna, the LNA and the radio frequency cable.
And 5, the EIRP acquisition technology software records the signal level value, and carries out EIRP test result correction by combining the tested non-stationary orbit satellite orbit file sent by the operation control center to finish the test of the non-stationary orbit satellite emission EIRP value. The specific process is as follows:
step 501, before starting a test, the EIRP acquisition and calculation software remotely accesses the spectrometer, sets and checks the spectrometer, controls the spectrometer to acquire signal level values according to a set time interval during the test, and stores the acquisition result in a storage area;
step 502, the EIRP acquisition and calculation software receives a measured non-stationary orbit satellite orbit file sent by an operation control center, calculates the distance between a measured non-stationary orbit satellite and a ground test station in the period of satellite transit according to a set time interval, and calculates the space loss of the whole orbit of a measured signal according to the distance and the frequency of a single tone signal;
in step 503, the EIRP acquisition calculation software calculates eirp=p according to the formula Actual measurement -G Receiving calibration +L Path loss Calculating an EIRP value of the measured non-stationary orbit satellite in the transit period; wherein P is Actual measurement For spectrometer measurement, L Path loss For the space loss of the whole orbit of the measured signal during the passing period of the satellite, G Receiving calibration For a known acquired received calibration value.
Claims (5)
1. The method for testing the EIRP value of the non-stationary orbit satellite transmission is characterized by comprising the following steps of:
step 1, a ground test station performs gain calibration on a tested frequency band antenna and an LNA channel;
step 2, the operation control center generates a measured non-stationary orbit satellite orbit file, and sends the file to a ground test station and EIRP acquisition and calculation software respectively, and the position coordinates of the selected ground test station are uploaded to the measured non-stationary orbit satellite;
step 3, the tested non-stationary orbit satellite points to the ground test station according to the position coordinates of the ground test station and transmits a single-tone signal with a fixed EIRP value;
step 4, the ground test station tracks the tested non-stationary orbit satellite according to the tested non-stationary orbit satellite orbit file, receives the single-tone signal emitted by the tested non-stationary orbit satellite, and measures the signal level value;
and 5, the EIRP acquisition technology software records the signal level value, and carries out EIRP test result correction by combining the tested non-stationary orbit satellite orbit file sent by the operation control center to finish the test of the non-stationary orbit satellite emission EIRP value.
2. The method for testing the transmitted EIRP value of a non-stationary orbit satellite according to claim 1, wherein the specific process of step 2 is as follows:
step 201, the operation control center calculates the orbit files of the non-stationary orbit satellites to be detected according to six orbits of the non-stationary orbit satellites to be detected, and sends the orbit files of the non-stationary orbit satellites to be detected to a ground test station and EIRP acquisition and calculation software respectively;
and 202, the operation control center selects a receiving ground test station according to the test plan, reads the position coordinates of the ground test station, and annotates the position coordinates of the ground test station on the tested non-stationary orbit satellite.
3. The method for testing the transmitted EIRP value of a non-stationary orbit satellite according to claim 1, wherein the specific process of step 3 is:
step 301, receiving the position coordinates of the ground test station sent by the operation control center by the non-stationary orbit satellite to be tested, and calculating the direction of the transmitting beam of the satellite-borne antenna by combining the position coordinates of the satellite-borne antenna to point to the ground test station;
step 302, the measured non-stationary orbit satellite configures the channel gain and the antenna gain to a linear region, and sets a transmitting signal mode as a single-tone signal;
in step 303, the non-stationary orbiting satellite under test transmits a single tone signal under test to the ground test station during the entire orbit with a fixed gain.
4. The method for testing the transmitted EIRP value of a non-stationary orbit satellite according to claim 1, wherein the specific process of step 4 is:
step 401, a ground test station receives a tested non-stationary orbit satellite orbit file sent by an operation control center, the tested non-stationary orbit satellite orbit file is used as a guide file of an initial tracking stage of a ground test station antenna, and after the ground test station antenna stably receives a signal, a tracking mode is changed from program tracking to automatic tracking;
step 402, setting up the ground test station antenna and LNA, and setting up the radio frequency cable and the frequency spectrograph to be consistent with the calibration;
in step 403, the ground test station sends the signal of the tested non-stationary orbit satellite to the frequency spectrograph for signal level measurement after passing through the ground test station antenna, the LNA and the radio frequency cable.
5. The method for testing the transmitted EIRP value of a non-stationary orbit satellite according to claim 1, wherein the specific process of step 5 is:
step 501, EIRP acquisition and calculation software controls a frequency spectrograph to acquire signal level values according to a set time interval, and stores acquisition results into a storage area;
step 502, the EIRP acquisition and calculation software receives a measured non-stationary orbit satellite orbit file sent by an operation control center, and calculates the space loss of the whole orbit of a measured signal in the period of satellite passing according to a set time interval;
in step 503, the EIRP acquisition calculation software calculates eirp=p according to the formula Actual measurement -G Receiving calibration +L Path loss Calculating an EIRP value of the measured non-stationary orbit satellite in the transit period; wherein P is Actual measurement For spectrometer measurement, L Path loss For the space loss of the whole orbit of the measured signal during the passing period of the satellite, G Receiving calibration For a known acquired received calibration value.
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