CN113645002A - System and method for testing coherent forwarding ratio of uniform carrier measurement and control responder - Google Patents
System and method for testing coherent forwarding ratio of uniform carrier measurement and control responder Download PDFInfo
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Abstract
The invention provides a system and a method for testing coherent forwarding ratio of a uniform carrier measurement and control responder, wherein the method comprises the following steps: the uplink radio frequency link is used for performing power attenuation on the uplink signal; the downlink radio frequency link is used for carrying out power attenuation on a downlink signal; an uplink signal generating device for generating an uplink single carrier signal; the downlink signal receiving equipment is used for receiving a downlink single carrier signal and measuring the signal frequency; the high frequency stabilizing source is used for generating a high frequency stabilizing signal, and outputting the high frequency stabilizing signal to a reference frequency input port of the uplink signal generating equipment and a reference frequency input port of the downlink signal receiving equipment respectively after power division; and the coherent forwarding ratio measuring equipment is used for controlling the operation of the uplink signal generating equipment and the downlink signal receiving equipment, acquiring the uplink signal frequency and the downlink signal frequency and generating a forwarding ratio test result. The invention can realize the measurement of the forwarding ratio and generate the test result, reduces the manual operation, improves the test efficiency and is beneficial to improving the test coverage rate and the test accuracy.
Description
Technical Field
The invention relates to the technical field of spacecraft testing, in particular to a system and a method for testing the coherent forwarding ratio of a unified carrier measurement and control transponder.
Background
The coherent forwarding ratio is one of the important technical indexes of the uniform carrier measurement and control responder, and is the ratio of uplink frequency and downlink frequency in the coherent mode of the uniform carrier responder. When the satellite runs in orbit, after the ground uplink signal reaches the satellite unified carrier measurement and control transponder, the transponder coherently forwards the downlink signal to the ground station, the ground station can realize distance measurement between the satellite and the ground station by measuring the time delay of the forwarded signal, relative speed measurement between the satellite and the ground station is realized by measuring the Doppler frequency shift of the forwarded signal, and in order to realize high-precision bidirectional Doppler speed measurement, the coherent forwarding ratio of the transponder meets strict index requirements. In the prior method for measuring the coherent forwarding ratio of the uniform carrier measurement and control transponder, the mode of manually setting the uplink signal frequency and measuring the downlink signal frequency is realized, the automation degree and the test efficiency are low, in the test process, the uplink signal frequency is often only set as the central carrier frequency and is vertically offset to individual frequency points around the central carrier frequency, the number of test sampling points is small, each area of the transponder forwarding bandwidth is not covered, and the test coverage rate is insufficient. The invention is designed for improving the test efficiency of the coherent forwarding ratio of the uniform carrier measurement and control responder and improving the test coverage rate.
The invention patent with publication number CN107994920A discloses a cube satellite measurement and control transponder and a coherent signal forwarding method thereof, which at least comprises: the test method comprises a VHF frequency band antenna, a first VHF band-pass filter, a radio frequency amplifier, a second VHF band-pass filter, a high-speed ADC, an FPGA, a high-speed DAC, a UHF band-pass filter and a temperature compensation crystal oscillator TCXO.
The invention patent with publication number CN102916692A discloses a digital coherent forwarding method with arbitrary forwarding ratio, which at least includes: A/D, D/A, phase discriminator, loop filter, loop DCO, phase coherent DCO, it can be realized on hardware platform such as FPGA, CPLD, DSP, etc., it has the advantages of arbitrary setting of forwarding ratio, stable performance, simple and reliable design, and the output and input frequency in the digital responder meets a certain forwarding ratio relation.
The invention patent with publication number CN107612610A discloses a satellite-borne measurement and control responder self-test system and method based on a lower computer, and the patent comprises the following steps: the design of the patent realizes the functions of autonomous detection and autonomous test of the satellite-borne spread spectrum measurement and control transponder, and transplants part of ground test tasks onto a satellite to meet the requirements of intellectualization and batch production of quick response satellite test tasks.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a system and a method for testing the coherent forwarding ratio of a uniform carrier measurement and control responder.
According to the system and the method for testing the coherent forwarding ratio of the uniform carrier measurement and control responder, the scheme is as follows:
in a first aspect, a system for testing a coherent forwarding ratio of a unified carrier measurement and control transponder is provided, the system comprising:
and an uplink radio frequency link: the device is used for carrying out power attenuation on the uplink signal, and the attenuation value can be adjusted to enable the uplink signal power to meet the receiving requirement of the tested uniform carrier responder; establishing a radio frequency signal transmission link with the tested uniform carrier transponder in a wired mode through a radio frequency cable or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna; the radio frequency cable is connected with the uplink signal generating equipment;
a downlink radio frequency link: the down signal power attenuation device is used for carrying out power attenuation on the down signal, and the attenuation value can be adjusted, so that the down signal power meets the receiving requirement of a down signal receiving device; establishing a radio frequency signal transmission link with the tested uniform carrier transponder in a wired mode through a radio frequency cable or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna; the radio frequency cable is connected with the downlink signal receiving equipment;
the uplink signal generating device: the device is used for generating an uplink single carrier signal; the radio frequency cable is connected with the uplink radio frequency link; the device is connected with the coherent forwarding ratio measuring device through a local area network;
the downlink signal receiving device: the device is used for receiving a downlink single carrier signal and measuring the signal frequency; the radio frequency cable is connected with the downlink radio frequency link; the device is connected with the coherent forwarding ratio measuring device through a local area network;
high frequency stabilization source: the device is used for generating a high frequency stabilization signal, and outputting the high frequency stabilization signal to a reference frequency input port of the uplink signal generating equipment and a reference frequency input port of the downlink signal receiving equipment after power division so as to enable working reference frequencies of the uplink signal generating equipment and the downlink signal receiving equipment to be homologous; the radio frequency cable is connected with the uplink signal generating equipment and the downlink signal receiving equipment;
coherent forwarding ratio measuring apparatus: the device is used for controlling the operation of the uplink signal generating equipment and the downlink signal receiving equipment, acquiring the uplink signal frequency and the downlink signal frequency and generating a forwarding ratio test result; and the local area network is connected with the uplink signal generating equipment and the downlink signal receiving equipment.
Preferably, the power and frequency of the generated signal of the uplink signal generating device can be adjusted, and the setting mode of the related parameters including the signal power and the signal frequency supports local control and remote control;
in a remote control mode, the control of the coherent forwarding ratio measuring equipment can be received through the local area network, the signal power and the frequency can be set, and relevant parameters including the signal power and the signal frequency can be sent to the coherent forwarding ratio measuring equipment through the local area network.
Preferably, the downlink signal receiving device is capable of receiving a downlink signal of a transponder and measuring a frequency of a downlink carrier signal;
the setting mode of the frequency measurement function parameter of the downlink signal receiving equipment supports two modes of local control and remote control, and in the remote control mode, the control of the coherent forwarding ratio measuring equipment can be received through the local area network, and the measurement result is sent to the coherent forwarding ratio measuring equipment through the local area network.
Preferably, the coherent forwarding ratio measuring device comprises an uplink signal generating device control module, a downlink signal receiving device control module and a coherent forwarding ratio calculating module;
the uplink signal generating equipment control module controls the uplink signal generating equipment to output an uplink single carrier signal through the local area network, the downlink signal receiving equipment control module obtains a measurement result of downlink signal frequency of the responder by the downlink signal receiving equipment through the local area network, and the coherent forwarding ratio calculation method of the coherent forwarding ratio calculation module to the uniform carrier measurement and control responder comprises the following steps:
preferably, the uplink signal generating device control module supports a fixed dot frequency signal output mode and a frequency sweep signal output mode when controlling the uplink signal generating device to output a single carrier signal.
Preferably, in the fixed dot frequency signal output mode, the signal frequency f needs to be set in the control module of the uplink signal generating deviceFixingAfter the control is started, the uplink signal generating equipment continuously outputs the frequency fFixingThe signal of (a);
in the output mode of the sweep frequency signal, the sweep frequency starting frequency f needs to be set in the control module of the uplink signal generating equipmentInitiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offThen, after the control is started, the uplink signal generating apparatus outputs the frequency f firstInitiation ofThe output is stopped after the duration of delta t is continuously output, and the output frequency is fInitiation ofA signal of + Δ f, the output of which is stopped after a duration of Δ tAnd output at a frequency fInitiation of+2 Δ f, and so on until the output signal frequency reaches the cut-off frequency fCut-offAnd the output is stopped after the delta t duration is continuously output.
In a second aspect, a method for testing a coherent forwarding ratio of a unified carrier measurement and control transponder is provided, where the system includes:
step S1: connecting the coherent transfer ratio measuring equipment with an uplink signal generating equipment and a downlink signal receiving equipment through a local area network, connecting the uplink signal generating equipment with an uplink radio frequency link through a radio frequency cable, connecting the downlink radio frequency link with a downlink signal receiving equipment through the radio frequency cable, connecting a high stable frequency source with the uplink signal generating equipment and the downlink signal receiving equipment through the radio frequency cable, and establishing a radio frequency signal transmission link between a measured uniform carrier transponder and the uplink radio frequency link and the downlink radio frequency link through the radio frequency cable in a wired mode or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna;
step S2: powering up the tested uniform carrier wave measurement and control responder and setting the responder to be in a coherent forwarding mode;
step S3: controlling an uplink signal generating device through a coherent forwarding ratio measuring device, and outputting a signal with fixed dot frequency, wherein the frequency of the signal is the receiving center frequency of a transponder;
adjusting the attenuation value of the uplink radio frequency link to ensure that the signal power reaching the responder is within the receiving dynamic range of the responder, the responder is stable in locking state of the uplink signal, and outputs a downlink signal according to a coherent forwarding ratio;
adjusting the attenuation value of a downlink radio frequency link to enable the power of a downlink signal reaching downlink signal receiving equipment to meet the receiving and measuring requirements;
step S4: setting a signal output control mode of a coherent transfer ratio measuring device to an uplink signal generating device as a sweep frequency signal mode, and setting an initial frequency fInitiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offWherein the starting frequency fInitiation ofThe lower limit value of the frequency of the uplink signal of the transponder coherent forwarding bandwidth and the cut-off frequency f of the sweep frequencyCut-offTo be in due courseThe transponder forwards the upper limit value of the frequency of the uplink signal of the bandwidth;
step S5: starting the work flow of the coherent transfer ratio measuring equipment, the uplink signal generating equipment starts to start from the initial frequency f under the control of the coherent transfer ratio measuring equipmentInitiation ofThe method comprises the steps that frequency signals of all levels of sweep frequency signals are output in sequence at the beginning, after a unified carrier measurement and control transponder receives an uplink signal, a downlink signal is formed through coherent forwarding, and a downlink signal receiving device measures the frequency of the signal after receiving the downlink signal;
the coherent forwarding ratio measuring equipment acquires the frequency value of the uplink signal and the measurement result of the downlink signal receiving equipment at the middle moment of the residence time of each frequency signal, and calculates the coherent forwarding ratio until the output of the uplink frequency sweeping signal is finished;
step S6: and the coherent forwarding ratio measuring equipment generates a test result, and the test process is finished.
Preferably, the measurement result form generated by the coherent forwarding ratio measurement device after the execution of the measurement flow includes a data document and a two-dimensional scattergram.
Preferably, the data document records frequency values of all levels of the uplink frequency sweeping signals, frequency measurement values of coherent forwarding downlink signals corresponding to the frequency values and coherent forwarding ratio calculation results corresponding to the frequency measurement values;
and the two-dimensional scatter diagram presents a coherent forwarding ratio measurement result in a graphical form, each point in the diagram takes each frequency value of the uplink sweep frequency signal as an X-axis coordinate value, and takes a corresponding coherent forwarding downlink signal frequency measurement value as a Y-axis coordinate value.
Preferably, the coherent forwarding ratio measuring device supports not only the execution of a single measurement process, but also the automatic execution of multiple measurement processes;
the method for automatically executing the multiple measurement processes comprises the following steps: the start frequency f is set in step S3Initiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offThen, the function option of the measurement times is changed from the default value 1 to N, and step S5 is automatically executed N times after the work flow is started;
and the measurement results after the N times of measurement processes are automatically executed are N +1 data documents and two-dimensional scatter diagrams, and the measurement results comprise the data documents and the two-dimensional scatter diagrams corresponding to the measurement processes and the average value data documents and the two-dimensional scatter diagrams of the N times of measurement results.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can realize the forwarding ratio measurement and generate the test result in a mode of automatic execution of the coherent forwarding ratio measurement equipment, thereby reducing manual operation and improving the test efficiency;
2. the number of the test frequency points and the frequency interval are convenient to set according to the test requirement, and cover each frequency band of the forwarding bandwidth, thereby being beneficial to improving the test coverage rate and accuracy.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of a coherent forwarding ratio test system of a unified carrier measurement and control transponder according to the present invention;
fig. 2 is a flow chart of a testing method of the coherent forwarding ratio testing system of the unified carrier measurement and control transponder of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The embodiment of the invention provides a coherent forwarding ratio test system of a unified carrier measurement and control responder, which specifically comprises the following components in percentage by reference to fig. 1:
and an uplink radio frequency link: the power attenuation device is used for carrying out power attenuation on an uplink signal, mainly comprises an adjustable attenuator combination and an interconnection cable, and the attenuation value can be adjusted according to the test requirement, so that the uplink signal power meets the receiving requirement of the tested uniform carrier responder; establishing a radio frequency signal transmission link with the tested uniform carrier transponder in a wired mode through a radio frequency cable or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna; and the radio frequency cable is connected with the uplink signal generating equipment.
A downlink radio frequency link: the power attenuation device is used for carrying out power attenuation on downlink signals and mainly comprises a high-power attenuator, an adjustable attenuator combination and an interconnection cable, wherein the attenuation value of the adjustable attenuator combination can be adjusted according to the test requirement, so that the downlink signal power meets the receiving requirement of downlink signal receiving equipment; establishing a radio frequency signal transmission link with the tested uniform carrier transponder in a wired mode through a radio frequency cable or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna; and is connected with the downlink signal receiving equipment through a radio frequency cable.
The uplink signal generating device: the device is used for generating an uplink single carrier signal and measuring the signal frequency; the radio frequency cable is connected with the uplink radio frequency link; and the device is connected with the coherent forwarding ratio measuring device through a local area network.
The downlink signal receiving device: the device is used for receiving a downlink single carrier signal and measuring the signal frequency; the radio frequency cable is connected with the downlink radio frequency link; and the device is connected with the coherent forwarding ratio measuring device through a local area network.
High frequency stabilization source: the device is used for generating a 10MHz high-frequency-stability signal, respectively outputting the signal to a reference frequency input port of uplink signal generating equipment and a reference frequency input port of downlink signal receiving equipment after power division, and setting clock reference sources of the uplink signal generating equipment and the downlink signal receiving equipment into an external reference mode to enable working reference frequencies of the uplink signal generating equipment and the downlink signal receiving equipment to be homologous; and the radio frequency cable is connected with the uplink signal generating equipment and the downlink signal receiving equipment.
Coherent forwarding ratio measuring apparatus: the device is used for controlling the operation of the uplink signal generating equipment and the downlink signal receiving equipment, acquiring the uplink signal frequency and the downlink signal frequency and generating a forwarding ratio test result; and the local area network is connected with the uplink signal generating equipment and the downlink signal receiving equipment.
According to the uplink signal generating equipment, the generated signal power and frequency can be adjusted, and the setting mode of relevant parameters including the signal power and the signal frequency supports local control and remote control. In a remote control mode, the control of the coherent forwarding ratio measuring equipment can be received through the local area network, the signal power and the frequency can be set, and relevant parameters including the signal power and the signal frequency can be sent to the coherent forwarding ratio measuring equipment through the local area network.
The downlink signal receiving equipment can receive downlink signals of the responder and measure the frequency of downlink carrier signals, the setting mode of frequency measurement function parameters supports two modes of local control and remote control, and the control of the coherent forwarding ratio measuring equipment can be received through the local area network in the remote control mode, and the measurement result is sent to the coherent forwarding ratio measuring equipment through the local area network. In a specific implementation, a frequency meter or a spectrum analyzer may be selected as the downstream signal receiving device.
The coherent forwarding ratio measuring device comprises an uplink signal generating device control module, a downlink signal receiving device control module and a coherent forwarding ratio calculating module. The control module of the uplink signal generating equipment controls the uplink signal generating equipment to output an uplink single carrier signal through the local area network, and has the functions of controlling and acquiring the radio frequency signal generator; the downlink signal receiving equipment control module acquires the measurement result of the downlink signal frequency of the responder by the downlink signal receiving equipment through the local area network, and has the functions of controlling the frequency meter and acquiring the state of the frequency analyzer; the method for calculating the coherent forwarding ratio of the uniform carrier measurement and control responder by the coherent forwarding ratio calculation module comprises the following steps:
in the coherent transfer ratio measuring equipment, an uplink signal generating equipment control module supports a fixed dot frequency signal output mode and a sweep frequency signal output mode when controlling the uplink signal generating equipment to output a single carrier signal. In the fixed dot frequency signal output mode, the uplink signal is required to be generatedSetting signal frequency f in equipment control moduleFixingAfter the control is started, the uplink signal generating equipment continuously outputs the frequency fFixingOf the signal of (1).
In the output mode of the sweep frequency signal, the sweep frequency starting frequency f needs to be set in the control module of the uplink signal generating equipmentInitiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offThen, after the control is started, the uplink signal generating apparatus outputs the frequency f firstInitiation ofThe output is stopped after the duration of delta t is continuously output, and the output frequency is fInitiation ofThe signal of + delta f stops outputting after continuously outputting delta t duration, and the output frequency is fInitiation of+2 Δ f, and so on until the output signal frequency reaches the cut-off frequency fCut-offAnd the output is stopped after the delta t duration is continuously output.
Referring to fig. 2, the present invention further provides a method for testing a coherent forwarding ratio of a unified carrier measurement and control transponder, which specifically includes the following steps:
step S1: the method comprises the steps of connecting a coherent transfer ratio measuring device with an uplink signal generating device and a downlink signal receiving device through a local area network, connecting the uplink signal generating device with an uplink radio frequency link through a radio frequency cable, connecting the downlink radio frequency link with a downlink signal receiving device through the radio frequency cable, connecting a high stable frequency source with the uplink signal generating device and the downlink signal receiving device through the radio frequency cable, and establishing a radio frequency signal transmission link between a measured uniform carrier transponder and the uplink radio frequency link and the downlink radio frequency link through the radio frequency cable in a wired mode or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna.
Step S2: the tested uniform carrier wave test and control responder is powered up and is set to be in a coherent forwarding mode.
Step S3: controlling an uplink signal generating device through a coherent forwarding ratio measuring device, and outputting a signal with fixed dot frequency, wherein the frequency of the signal is the receiving center frequency of a transponder; adjusting the attenuation value of the uplink radio frequency link to ensure that the signal power reaching the responder is within the receiving dynamic range of the responder, the responder is stable in locking state of the uplink signal, and outputs a downlink signal according to a coherent forwarding ratio; and adjusting the attenuation value of the downlink radio frequency link to ensure that the power of the downlink signal reaching the downlink signal receiving equipment meets the receiving and measuring requirements.
Step S4: setting a signal output control mode of a coherent transfer ratio measuring device to an uplink signal generating device as a sweep frequency signal mode, and setting an initial frequency fInitiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offWherein the starting frequency fInitiation ofThe lower limit value of the frequency of the uplink signal of the transponder coherent forwarding bandwidth and the cut-off frequency f of the sweep frequencyCut-offAnd the upper limit value of the frequency of the uplink signal of the bandwidth is forwarded for the transponder.
Step S5: starting the work flow of the coherent transfer ratio measuring equipment, the uplink signal generating equipment starts to start from the initial frequency f under the control of the coherent transfer ratio measuring equipmentInitiation ofThe method comprises the steps that frequency signals of all levels of sweep frequency signals are output in sequence at the beginning, after a unified carrier measurement and control transponder receives an uplink signal, a downlink signal is formed through coherent forwarding, and a downlink signal receiving device measures the frequency of the signal after receiving the downlink signal; and the coherent forwarding ratio measuring equipment acquires the frequency value of the uplink signal and the measurement result of the downlink signal receiving equipment at the middle moment of the residence time of each frequency signal, and calculates the coherent forwarding ratio until the output of the uplink frequency sweeping signal is finished.
Step S6: and the coherent forwarding ratio measuring equipment generates a test result, and the test process is finished.
In the above test method, the measurement result format generated by the coherent forwarding ratio measurement apparatus after the execution of the measurement procedure in step S6 includes two types, namely a data file and a two-dimensional scattergram.
The data file records frequency values of all levels of the uplink frequency sweeping signals, corresponding frequency measurement values of coherent forwarding downlink signals and corresponding calculation results of coherent forwarding ratios; and the two-dimensional scatter diagram presents a coherent forwarding ratio measurement result in a graphical form, each point in the diagram takes each frequency value of the uplink sweep frequency signal as an X-axis coordinate value, and takes a corresponding coherent forwarding downlink signal frequency measurement value as a Y-axis coordinate value.
In the above testIn the method, the coherent forwarding ratio measuring equipment not only supports the execution of a single measuring process, but also supports the automatic execution of a plurality of measuring processes; the method for automatically executing the multiple measurement processes comprises the following steps: the start frequency f is set in step S3Initiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offThen, the function option of the measurement times is changed from the default value 1 to N, and step S5 is automatically executed N times after the work flow is started; and the measurement results after the N times of measurement processes are automatically executed are N +1 data documents and two-dimensional scatter diagrams, and the measurement results comprise the data documents and the two-dimensional scatter diagrams corresponding to the measurement processes and the average value data documents and the two-dimensional scatter diagrams of the N times of measurement results.
The embodiment of the invention provides a system and a method for testing the coherent forwarding ratio of a uniform carrier measurement and control responder, which can realize the measurement of the forwarding ratio and generate a test result in an automatic execution mode of a coherent forwarding ratio measuring device, reduce manual operation and improve the test efficiency; and the number of the test frequency points and the frequency interval are convenient to set according to the test requirement, and each frequency band of the forwarding bandwidth is covered, so that the test coverage rate and the test accuracy are improved.
Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A coherent forwarding ratio test system of a unified carrier measurement and control transponder is characterized by comprising:
and an uplink radio frequency link: the device is used for carrying out power attenuation on the uplink signal, and the attenuation value can be adjusted to enable the uplink signal power to meet the receiving requirement of the tested uniform carrier responder; establishing a radio frequency signal transmission link with the tested uniform carrier transponder in a wired mode through a radio frequency cable or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna; the radio frequency cable is connected with the uplink signal generating equipment;
a downlink radio frequency link: the down signal power attenuation device is used for carrying out power attenuation on the down signal, and the attenuation value can be adjusted, so that the down signal power meets the receiving requirement of a down signal receiving device; establishing a radio frequency signal transmission link with the tested uniform carrier transponder in a wired mode through a radio frequency cable or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna; the radio frequency cable is connected with the downlink signal receiving equipment;
the uplink signal generating device: the device is used for generating an uplink single carrier signal; the radio frequency cable is connected with the uplink radio frequency link; the device is connected with the coherent forwarding ratio measuring device through a local area network;
the downlink signal receiving device: the device is used for receiving a downlink single carrier signal and measuring the signal frequency; the radio frequency cable is connected with the downlink radio frequency link; the device is connected with the coherent forwarding ratio measuring device through a local area network;
high frequency stabilization source: the device is used for generating a high frequency stabilization signal, and outputting the high frequency stabilization signal to a reference frequency input port of the uplink signal generating equipment and a reference frequency input port of the downlink signal receiving equipment after power division so as to enable working reference frequencies of the uplink signal generating equipment and the downlink signal receiving equipment to be homologous; the radio frequency cable is connected with the uplink signal generating equipment and the downlink signal receiving equipment;
coherent forwarding ratio measuring apparatus: the device is used for controlling the operation of the uplink signal generating equipment and the downlink signal receiving equipment, acquiring the uplink signal frequency and the downlink signal frequency and generating a forwarding ratio test result; and the local area network is connected with the uplink signal generating equipment and the downlink signal receiving equipment.
2. The system according to claim 1, wherein the uplink signal generating device generates signals with adjustable power and frequency, and the setting mode of the relevant parameters including the signal power and the signal frequency supports local control and remote control;
in a remote control mode, the control of the coherent forwarding ratio measuring equipment can be received through the local area network, the signal power and the frequency can be set, and relevant parameters including the signal power and the signal frequency can be sent to the coherent forwarding ratio measuring equipment through the local area network.
3. The system according to claim 1, wherein the downlink signal receiving device is capable of receiving downlink signals of the transponder and measuring the frequency of the downlink carrier signals;
the setting mode of the frequency measurement function parameter of the downlink signal receiving equipment supports two modes of local control and remote control, and in the remote control mode, the control of the coherent forwarding ratio measuring equipment can be received through the local area network, and the measurement result is sent to the coherent forwarding ratio measuring equipment through the local area network.
4. The system according to claim 1, wherein the coherent forwarding ratio measuring device comprises an uplink signal generating device control module, a downlink signal receiving device control module, and a coherent forwarding ratio calculating module;
the uplink signal generating equipment control module controls the uplink signal generating equipment to output an uplink single carrier signal through the local area network, the downlink signal receiving equipment control module obtains a measurement result of downlink signal frequency of the responder by the downlink signal receiving equipment through the local area network, and the coherent forwarding ratio calculation method of the coherent forwarding ratio calculation module to the uniform carrier measurement and control responder comprises the following steps:
5. the system according to claim 4, wherein the control module of the uplink signal generating device supports a fixed dot-frequency signal output mode and a frequency-sweep signal output mode when controlling the uplink signal generating device to output a single-carrier signal.
6. The system according to claim 5, wherein in the fixed dot-frequency signal output mode, the signal frequency f is set in the control module of the uplink signal generating deviceFixingAfter the control is started, the uplink signal generating equipment continuously outputs the frequency fFixingThe signal of (a);
in the output mode of the sweep frequency signal, the sweep frequency starting frequency f needs to be set in the control module of the uplink signal generating equipmentInitiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offThen, after the control is started, the uplink signal generating apparatus outputs the frequency f firstInitiation ofThe output is stopped after the duration of delta t is continuously output, and the output frequency is fInitiation ofThe signal of + delta f stops outputting after continuously outputting delta t duration, and the output frequency is fInitiation of+2 Δ f, and so on until the output signal frequency reaches the cut-off frequency fCut-offAnd the output is stopped after the delta t duration is continuously output.
7. A method for testing the coherent forwarding ratio of a unified carrier measurement and control transponder, which is based on the system for testing the coherent forwarding ratio of a unified carrier measurement and control transponder as claimed in any one of claims 1 to 6, and comprises the following steps:
step S1: connecting the coherent transfer ratio measuring equipment with an uplink signal generating equipment and a downlink signal receiving equipment through a local area network, connecting the uplink signal generating equipment with an uplink radio frequency link through a radio frequency cable, connecting the downlink radio frequency link with a downlink signal receiving equipment through the radio frequency cable, connecting a high stable frequency source with the uplink signal generating equipment and the downlink signal receiving equipment through the radio frequency cable, and establishing a radio frequency signal transmission link between a measured uniform carrier transponder and the uplink radio frequency link and the downlink radio frequency link through the radio frequency cable in a wired mode or in a wireless mode through the radio frequency cable, a ground antenna and a satellite-borne antenna;
step S2: powering up the tested uniform carrier wave measurement and control responder and setting the responder to be in a coherent forwarding mode;
step S3: controlling an uplink signal generating device through a coherent forwarding ratio measuring device, and outputting a signal with fixed dot frequency, wherein the frequency of the signal is the receiving center frequency of a transponder;
adjusting the attenuation value of the uplink radio frequency link to ensure that the signal power reaching the responder is within the receiving dynamic range of the responder, the responder is stable in locking state of the uplink signal, and outputs a downlink signal according to a coherent forwarding ratio;
adjusting the attenuation value of a downlink radio frequency link to enable the power of a downlink signal reaching downlink signal receiving equipment to meet the receiving and measuring requirements;
step S4: setting a signal output control mode of a coherent transfer ratio measuring device to an uplink signal generating device as a sweep frequency signal mode, and setting an initial frequency fInitiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offWherein the starting frequency fInitiation ofThe lower limit value of the frequency of the uplink signal of the transponder coherent forwarding bandwidth and the cut-off frequency f of the sweep frequencyCut-offAn uplink signal frequency upper limit value of a bandwidth is forwarded for the transponder;
step S5: starting the work flow of the coherent transfer ratio measuring equipment, the uplink signal generating equipment starts to start from the initial frequency f under the control of the coherent transfer ratio measuring equipmentInitiation ofThe method comprises the steps that frequency signals of all levels of sweep frequency signals are output in sequence at the beginning, after a unified carrier measurement and control transponder receives an uplink signal, a downlink signal is formed through coherent forwarding, and a downlink signal receiving device measures the frequency of the signal after receiving the downlink signal;
the coherent forwarding ratio measuring equipment acquires the frequency value of the uplink signal and the measurement result of the downlink signal receiving equipment at the middle moment of the residence time of each frequency signal, and calculates the coherent forwarding ratio until the output of the uplink frequency sweeping signal is finished;
step S6: and the coherent forwarding ratio measuring equipment generates a test result, and the test process is finished.
8. The method for testing the coherent forwarding ratio of the unified carrier measurement and control transponder according to claim 7, wherein the measurement result form generated by the coherent forwarding ratio measurement device after the measurement process is completed comprises a data file and a two-dimensional scatter diagram.
9. The method according to claim 8, wherein the data document records frequency values of each level of the uplink sweep frequency signal, frequency measurement values of coherent forwarding downlink signals corresponding to the frequency values, and coherent forwarding ratio calculation results corresponding to the frequency measurement values;
and the two-dimensional scatter diagram presents a coherent forwarding ratio measurement result in a graphical form, each point in the diagram takes each frequency value of the uplink sweep frequency signal as an X-axis coordinate value, and takes a corresponding coherent forwarding downlink signal frequency measurement value as a Y-axis coordinate value.
10. The method according to claim 8, wherein the coherent forwarding ratio measuring device supports not only the execution of a single measurement procedure but also the automatic execution of multiple measurement procedures;
the method for automatically executing the multiple measurement processes comprises the following steps: the start frequency f is set in step S3Initiation ofDwell time Δ t, step interval Δ f and sweep cut-off frequency fCut-offThen, at the same timeModifying the function option of the measurement times from the default value 1 to N, and then automatically executing the step S5 for N times after starting the working process;
and the measurement results after the N times of measurement processes are automatically executed are N +1 data documents and two-dimensional scatter diagrams, and the measurement results comprise the data documents and the two-dimensional scatter diagrams corresponding to the measurement processes and the average value data documents and the two-dimensional scatter diagrams of the N times of measurement results.
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