Vector error amplitude measurement device and measurement method, terminal and storage medium

Abstract

The present invention relates to the technical field of modulation parameter measurement of wafer-level semiconductor devices, and in particular to a vector error amplitude measurement device and measurement method, terminal and storage medium, wherein the device is provided with an up-down conversion unit and a signal analyzer, and the signal analyzer analyzes the signal deterioration degree, i.e., the frequency response data, used to load the signal to the target to be measured after up-down conversion, and uses the frequency response data to correct the signal deterioration degree in the up-conversion and down-conversion of the vector signal, thereby greatly reducing the impact of EVM deterioration caused by the vector source and improving the measurement accuracy of EVM. In some application scenarios, the microwave source includes a microwave signal source and a power divider, which realizes that after the signal is distributed with power as required, it is sent to the up-conversion unit and the down-conversion unit respectively, reducing the complexity of the system, using fewer microwave signal sources, and meeting the requirements for terahertz frequency band power amplifier testing, solving the problem that the existing measuring equipment and instruments cannot test high-frequency devices to be tested, and the analysis results obtained by the signal analyzer are more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of modulation parameter measurement of wafer-level semiconductor devices, and in particular to a vector error amplitude measurement device and method, a terminal and a storage medium. Background Art

[0002] Internationally, for the measurement of the error vector magnitude (EVM) of power amplifiers in low frequency bands (e.g., below 50 GHz), direct testing using a vector signal generator and a vector signal analyzer (VSA) is usually used. Research on vector signal analyzers started early in developed countries, and there are already some relatively mature products. Currently, manufacturers of commonly used vector signal analyzers continue to invest in research and development based on existing products. Although 85 GHz vector signal analyzers have appeared in recent years, the current commercial systems only test the adjacent channel power suppression ratio and vector error magnitude of power amplifiers up to 67 GHz, which is mainly limited by the maximum output frequency of the vector signal source being only 67 GHz.

[0003] EVM is the vector difference between the ideal error-free signal and the actual transmitted signal at a given moment. Because this value is constantly changing when each symbol changes, EVM is defined as the root mean square value of the error vector over a period of time. The larger the EVM value, the worse the modulation quality of the transmitted signal; the smaller the EVM, the better the modulation quality of the transmitted signal. It should be noted that this indicator does not define the modulation accuracy of the RF signal, but the modulation accuracy of the discrete I / Q values ​​sampled after mapping the RF signal to the I / Q plane. Because before collecting discrete IQ data, it first passes through a matched filter to suppress out-of-band noise. Therefore, the biggest influence on EVM is the nonlinear product of the transmission channel, especially the in-band distortion of the signal.

[0004] EVM is defined as the RMS value of the ratio of the average error vector signal power to the average reference signal power:

[0005]

[0006] In the formula, S n is the discrete I / Q value obtained by sampling, N is the total number of samples, and EVM RMS is the RMS value of the ratio of the average error vector signal power to the average reference signal power.

[0007] In some millimeter wave and THz applications, this frequency range is not enough. The common method to expand the frequency range is to use a mixer up-converter to up-convert the output frequency to the desired millimeter wave frequency band.

[0008] like Figure 1 As shown, Figure 1 A millimeter-wave vector source structure is shown. During the application and implementation of such a solution, it is found that the upconverter and the driver deteriorate the broadband signal quality of the microwave vector source. The EVM of a conventional vector signal source is below 0.5%. In order to test the EVM introduced by the power amplifier, the EVM of the vector signal source must be small enough. If the EVM of the vector signal source is greatly affected by the circuit, it will be impossible to evaluate whether the EVM measured by the system is introduced by the power amplifier itself or by the external circuit of the vector signal source. Therefore, before testing, the EVM of the vector signal source needs to be corrected. However, in order to measure the modulation quality of the amplifier under test, the signal quality of the millimeter-wave signal source must be improved first, and the baseband signal of the vector source needs to be pre-distorted. That is, when the signal source outputs a broadband signal, the amplitude and phase of each frequency point in the band are automatically compensated and corrected, so that the modulation quality at the output of the driver is optimized.

[0009] Based on this, it is necessary to develop and design a vector error amplitude measurement method to solve the problem of microwave vector source signal deterioration. Summary of the invention

[0010] The embodiments of the present invention provide a vector error amplitude measurement device and method, a terminal and a storage medium, which are used to solve the problem in the prior art that the distortion of a vector signal source affects the vector error amplitude measurement result.

[0011] In a first aspect, an embodiment of the present invention provides a vector error amplitude measurement device, comprising:

[0012] Microwave source, vector source, up-conversion unit and signal analyzer;

[0013] The microwave source and the vector source are respectively connected to the input end signal of the up-conversion unit;

[0014] The signal analyzer is used to receive a second vector signal through an input terminal, and is used to output frequency response data indicative of the second vector signal;

[0015] The output end of the up-conversion unit is used to output a first vector signal, wherein the second vector signal is generated based on the first vector signal, the vector source outputs a signal according to a frequency response data table, the first vector signal is generated based on the mixing of the output signal of the vector source and a frequency-multiplied signal of the output signal of the microwave source, and the frequency response data table is generated based on a plurality of the frequency response data.

[0016] In a possible implementation manner, the vector error amplitude measurement device further includes:

[0017] A down-conversion unit, wherein an output terminal of the down-conversion unit is signal-connected to an input terminal of the signal analyzer;

[0018] The input end of the down-conversion unit is used to input the third vector signal, and the output end of the down-conversion unit outputs the second vector signal, and the second vector signal is generated based on down-conversion of the third vector signal.

[0019] In a possible implementation, the down-conversion unit includes:

[0020] An attenuator and a down converter, wherein the input end of the down converter is signal-connected to the output end of the attenuator, and the output end of the down converter is signal-connected to the input end of the signal analyzer;

[0021] The attenuator input terminal is used to input the third vector signal, and the down-converter performs down-conversion according to the output of the attenuator to generate the second vector signal.

[0022] In a possible implementation, the microwave source includes: a microwave signal source and a power divider, the microwave signal source is signal-connected to an input end of the power divider, and an output end of the power divider is signal-connected to the up-conversion unit and the down-conversion unit respectively;

[0023] The power divider is used to distribute power of the local oscillator signal generated by the microwave signal source according to a preset value, and then transmit it to the up-conversion unit and the down-conversion unit. The up-conversion unit outputs the first vector signal based on the local oscillator signal and the output signal of the vector source, and the down-conversion unit outputs the second vector signal based on the local oscillator signal and the third vector signal.

[0024] In a possible implementation, the up-conversion unit includes:

[0025] A frequency multiplier, a frequency mixer, an isolator and a driving amplifier, wherein the input end of the frequency multiplier is signal-connected to the output end of the microwave source, the output end of the frequency multiplier and the output end of the vector signal source are respectively signal-connected to the input end of the mixer, the output end of the mixer is signal-connected to the input end of the isolator, and the output end of the isolator is signal-connected to the input end of the driving amplifier;

[0026] The frequency multiplier generates a frequency multiplied signal of the output end signal of the microwave source, the mixer generates a mixed signal based on the output signal of the vector source and the frequency multiplied signal, and the driving amplifier generates the second vector signal by amplifying the mixed signal.

[0027] In a second aspect, an embodiment of the present invention provides a method for measuring a vector error amplitude, including:

[0028] Based on multiple test points, the vector error amplitude measurement device is calibrated at multiple test points to obtain multiple frequency response data, wherein the multiple test points include different frequency points and different power points, and the vector error amplitude measurement device is not connected to the measured object during the calibration test;

[0029] Generate calibration compensation data according to the plurality of frequency response data, input the calibration compensation data into the vector source, and calibrate the vector error amplitude measurement device;

[0030] The target to be measured is connected to the vector error amplitude measurement device, and the target to be measured is tested based on multiple test points to obtain vector error amplitude data, wherein the multiple test points include different frequency points and different power points.

[0031] In a possible implementation, the vector error amplitude measurement device is tested based on multiple test points to obtain multiple frequency response data, including:

[0032] For each frequency point and each power point, perform the following steps:

[0033] Generate a first vector signal according to the frequency point and the power point;

[0034] Obtaining a first vector error amplitude according to the second vector signal;

[0035] Perform preprocessing according to the first vector error amplitude to generate a calibration file;

[0036] The calibration file is added to a calibration file database.

[0037] In a possible implementation, the target to be measured is connected to the vector error amplitude measurement device, and the target to be measured is tested based on multiple test points to obtain vector error amplitude data, including:

[0038] For each frequency point and each power point, perform the following steps:

[0039] Obtain the calibration file from the calibration file database according to the frequency point and the power point;

[0040] generating a first vector signal according to the calibration file;

[0041] Obtaining a second vector error amplitude according to the second vector signal;

[0042] The second vector error magnitude is added to the vector error magnitude data.

[0043] In a third aspect, an embodiment of the present invention provides a terminal, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, it implements the steps of the method described in the second aspect or any possible implementation method of the second aspect.

[0044] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in the second aspect or any possible implementation of the second aspect are implemented.

[0045] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0046] The embodiment of the present invention discloses a vector error amplitude measurement device, which is provided with an up-conversion unit and a signal analyzer. The signal analyzer analyzes the signal deterioration degree of the signal loaded to the target after up-conversion, that is, the frequency response data, and uses the frequency response data to correct the signal deterioration degree in the up-conversion and down-conversion of the vector signal, which greatly reduces the impact of EVM deterioration caused by the vector source and improves the measurement accuracy of EVM. In some application scenarios, the microwave source includes a microwave signal source and a power divider, which realizes that after the signal is distributed with power as needed, it is sent to the up-conversion unit and the down-conversion unit respectively, which reduces the complexity of the system, uses fewer microwave signal sources, and the microwave signal sources for up-conversion and down-conversion are more consistent, and the analysis results obtained by the signal analyzer are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 is a schematic diagram of a millimeter wave vector source structure in the prior art provided by an embodiment of the present invention;

[0049] Figure 2 is a principle diagram of a first vector error amplitude measurement device provided by an embodiment of the present invention;

[0050] Figure 3 is a schematic diagram of a second vector error amplitude measurement device provided by an embodiment of the present invention applied in a calibration process;

[0051] Figure 4 is a principle diagram of a second vector error amplitude measurement device provided by an embodiment of the present invention applied in a measurement process;

[0052] Figure 5 is a flow chart of a method for measuring a vector error amplitude provided by an embodiment of the present invention;

[0053] Figure 6 It is a functional block diagram of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary details.

[0055] In order to make the purpose, technical solutions and advantages of the present invention more clear, a specific implementation method will be described below in conjunction with the accompanying drawings.

[0056] The following is a detailed description of an embodiment of the present invention. This example is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0057] Figure 2 This is a schematic diagram of a first vector error amplitude measurement device provided in an embodiment of the present invention.

[0058] like Figure 2 As shown, it shows a schematic diagram of a first vector error amplitude measurement device provided by an embodiment of the present invention, which is described in detail as follows:

[0059] A vector error amplitude measuring device, comprising:

[0060] Microwave source 202, vector source 201, up-conversion unit 203 and signal analyzer 205;

[0061] The microwave source 202 and the vector source 201 are respectively connected to the input end signal of the up-conversion unit 203;

[0062] The signal analyzer 205 is used to receive a second vector signal through an input terminal, and is used to output frequency response data indicating the second vector signal;

[0063] The output end of the up-conversion unit 203 is used to output a first vector signal, wherein the second vector signal is generated based on the first vector signal, the vector source 201 outputs a signal according to a frequency response data table, the first vector signal is generated based on the mixing of the output signal of the vector source 201 and the frequency-multiplied signal of the output signal of the microwave source 202, and the frequency response data table is generated based on a plurality of the frequency response data.

[0064] For example, in order to test the adjacent channel suppression ratio and vector error amplitude parameters of the power amplifier in the terahertz frequency band (such as 75GHz to 110GHz), a vector signal source of 75GHz to 110GHz is required. A feasible solution is to move the low-frequency vector signal source to 75GHz to 110GHz through an up-converter. Since the power amplifier to be tested requires a higher input power, a driver amplifier must also be selected. In order to prevent signal backflow from damaging the up-converter and the vector signal source, the system must also be connected to an isolator 206. The output signal power of the power amplifier to be tested is too large, and a power attenuator is required to connect to the signal analyzer. The introduction of the up-converter, isolator 206 and driver amplifier will deteriorate the vector signal EVM, so it is also necessary to study the vector signal source pre-distortion technology to reduce the deterioration of EVM.

[0065] Therefore, the embodiment of the present invention provides a technical solution to solve the problem of vector signal EVM degradation and the impact on measurement results: the vector signal source needs to have a frequency response calibration function or a baseband function, and the millimeter wave signal analyzer or radio frequency signal analyzer is externally connected to a millimeter wave mixer, working in the linear region, and is amplitude and phase calibrated and built into the instrument at the factory, which can be used as a reference instrument. Through the distortion measurement function, the signal emitted by the vector source 201 through the up-converter and the driver amplifier 204 is actually measured to obtain an in-band frequency response data table as a correction compensation value, including amplitude frequency response and phase frequency response. The correction compensation data table is uploaded to the vector source to perform real-time distortion compensation on its baseband signal, which is the so-called pre-distortion process.

[0066] Specifically in the application scenario, one way is that the pre-distortion function can use the built-in option of the signal analyzer, combined with the vector signal source correction data import function; it can also be replaced by a network analyzer to obtain the nonlinear distortion of the up-converter and driver amplifier as correction data, and obtain amplitude and phase amplitude curve data, with the frequency axis corresponding to the IF frequency.

[0067] In one structure, the vector error amplitude measurement device includes a vector source 201 , a microwave source 202 , an up-conversion unit 203 and a signal analyzer 205 , and in some scenarios, may also include a driving amplifier 204 and / or an attenuator 2081 .

[0068] The signal of the vector source 201 and the signal of the microwave source 202 are mixed in the up-conversion unit 203 to generate a high-frequency signal. In some scenarios, this high-frequency signal needs to be amplified by the driver amplifier 204. Then, when the driver amplifier 204 is provided, in order to prevent the signal level from being too high and exceeding the capacity of the signal analyzer, an attenuator 2081 is also provided. The high-frequency signal through the above path is sent to the signal analyzer 205 to analyze the degree of signal deterioration when passing through the up-conversion unit 203 and other intermediate components. Generally speaking, it is frequency response data. The frequency response data is input into the vector source 201, and the vector signal is corrected according to the frequency response data, and finally the EVM deterioration of the vector signal is removed or reduced.

[0069] In some implementations, the vector error amplitude measurement device further includes:

[0070] A down-conversion unit 208, wherein the output end of the down-conversion unit 208 is signal-connected to the input end of the signal analyzer 205;

[0071] The input end of the down-conversion unit 208 is used to input the third vector signal, and the output end of the down-conversion unit 208 outputs the second vector signal, which is generated based on down-conversion of the third vector signal.

[0072] In some implementations, the down-conversion unit 208 includes:

[0073] An attenuator 2081 and a down converter 2082, wherein the input end of the down converter 2082 is signal-connected to the output end of the attenuator 2081, and the output end of the down converter 2082 is signal-connected to the input end of the signal analyzer 205;

[0074] The input end of the attenuator 2081 is used to input the third vector signal, and the down-converter 2082 performs down-conversion according to the output of the attenuator 2081 to generate the second vector signal.

[0075] In some embodiments, the microwave source 202 includes: a microwave signal source 2021 and a power divider 2022, wherein the microwave signal source 2021 is signal-connected to an input end of the power divider 2022, and an output end of the power divider 2022 is signal-connected to the up-conversion unit 203 and the down-conversion unit 208, respectively;

[0076] The power divider 2022 is used to distribute the power of the local oscillator signal generated by the microwave signal source 2021 according to a preset value, and transmit it to the up-conversion unit 203 and the down-conversion unit 208. The up-conversion unit 203 outputs the first vector signal based on the local oscillator signal and the output signal of the vector source 201, and the down-conversion unit 208 outputs the second vector signal based on the local oscillator signal and the third vector signal.

[0077] For example, Figure 3 A schematic diagram showing a second vector error amplitude measurement device provided by an embodiment of the present invention applied in a calibration process is shown.

[0078] In some application scenarios, the frequency of the up-converted vector signal exceeds the range that the signal analyzer 205 can handle. In this case, it is necessary to add a down-conversion unit 208 to down-convert the vector signal and send it to the signal analyzer 205.

[0079] Generally speaking, the down-conversion unit 208 includes an attenuator 2081 and a down-converter 2082 . The attenuator 2081 attenuates the vector signal, and then the down-converter 2082 down-converts the vector signal.

[0080] In order to make the vector signal before up-conversion and the vector signal after down-conversion have the same frequency, and to reduce the number of microwave signal sources 2021 used, in an application scenario, the microwave source 202 includes a microwave signal source 2021 and a power divider 2022. The power divider 2022 divides the microwave signal source 2021 into two parts according to a predetermined power, and sends them to the up-conversion unit 203 and the down-conversion unit 208 respectively, thereby realizing the up-conversion and down-conversion of the vector signal with the same source.

[0081] In some implementations, the up-conversion unit 203 includes:

[0082] A frequency multiplier 2031, a mixer 2032, an isolator 206 and a driving amplifier 204, wherein the input end of the frequency multiplier 2031 is signal-connected to the output end of the microwave source 202, the output end of the frequency multiplier 2031 and the output end of the vector signal source are respectively signal-connected to the input end of the mixer 2032, the output end of the mixer 2032 is signal-connected to the input end of the isolator 206, and the output end of the isolator 206 is signal-connected to the input end of the driving amplifier 204;

[0083] The frequency multiplier 2031 generates a frequency multiplied signal of the output signal of the microwave source 202 , the frequency mixer 2032 generates a mixed signal based on the output signal of the vector source 201 and the frequency multiplied signal, and the driving amplifier 204 generates the second vector signal by amplifying the mixed signal.

[0084] Exemplarily, in some embodiments, the up-conversion unit 203 includes a frequency multiplier 2031, a mixer 2032, an isolator 206, and a driver amplifier 204. The frequency multiplier 2031 multiplies the signal of the microwave signal source 2021 from the power divider 2022, and then mixes it with the vector signal in the mixer 2032 to achieve up-conversion. In order to prevent the signal from backflowing and damaging the up-converter and the vector signal source, the system is connected to the isolator 206. Since the power amplifier to be tested requires a higher input power, a driver amplifier 204 is also provided. The signal mixed and output by the mixer 2032 passes through the isolator 206 and the driver amplifier 204 in sequence, and then outputs a radio frequency signal.

[0085] The embodiment of the vector error amplitude measurement device of the present invention is provided with an up-conversion unit 203 and a signal analyzer 205. The signal analyzer 205 analyzes the signal deterioration degree of the signal loaded to the measured target after up-conversion, that is, the frequency response data, and uses the frequency response data to correct the signal deterioration degree in the up-conversion and down-conversion of the vector signal, which greatly reduces the influence of EVM deterioration caused by the vector source 201 and improves the measurement accuracy of EVM. In some application scenarios, the microwave source 202 includes a microwave signal source 2021 and a power divider 2022, which realizes that after the signal is distributed with power as required, it is sent to the up-conversion unit 203 and the down-conversion unit 208 respectively, which reduces the complexity of the system, uses fewer microwave signal sources 2021, and the microwave signal sources 2021 for up- and down-conversion are more consistent, and the analysis results obtained by the signal analyzer 205 are more accurate.

[0086] Figure 4 A schematic diagram of a second vector error amplitude measurement device used in a measurement process is provided. Figure 5 A flow chart of a vector error amplitude measurement method provided by an embodiment of the present invention is provided. In combination with two drawings, in a second aspect, an embodiment of the present invention provides a vector error amplitude measurement method, including:

[0087] Based on multiple test points, the vector error amplitude measurement device is subjected to a calibration test at multiple test points to obtain multiple frequency response data, wherein the multiple test points include different frequency points and different power points, and the vector error amplitude measurement device is not connected to the measured object during the calibration test;

[0088] Generate calibration compensation data according to the plurality of frequency response data, input the calibration compensation data into the vector source, and calibrate the vector error amplitude measurement device;

[0089] The target to be measured is connected to the vector error amplitude measurement device, and the target to be measured is tested based on multiple test points to obtain vector error amplitude data, wherein the multiple test points include different frequency points and different power points.

[0090] In a possible implementation, the vector error amplitude measurement device is tested based on multiple test points to obtain multiple frequency response data, including:

[0091] For each frequency point and each power point, perform the following steps:

[0092] Generate a first vector signal according to the frequency point and the power point;

[0093] Obtaining a first vector error amplitude according to the second vector signal;

[0094] Perform preprocessing according to the first vector error amplitude to generate a calibration file;

[0095] The calibration file is added to a calibration file database.

[0096] In a possible implementation, the target to be measured is connected to the vector error amplitude measurement device, and the target to be measured is tested based on multiple test points to obtain vector error amplitude data, including:

[0097] For each frequency point and each power point, perform the following steps:

[0098] Obtain the calibration file from the calibration file database according to the frequency point and the power point;

[0099] generating a first vector signal according to the calibration file;

[0100] Obtaining a second vector error amplitude according to the second vector signal;

[0101] The second vector error magnitude is added to the vector error magnitude data.

[0102] For example, taking the test method with a down-conversion unit as an example, in a specific application scenario, the signal analyzer 205 has millimeter wave pre-distortion test and compensation functions. The host computer, the signal source and the signal analyzer 205 communicate via a network cable.

[0103] The vector source 201 provides an IF modulation signal, for example, an intermediate frequency IF 0 to 5 GHz, selects a modulation mode (such as 4PSK, filter, code rate), and generates a modulation bandwidth. The vector source 201 has a frequency response correction function within the modulation bandwidth. The microwave signal source 2021 generates a continuous RF local oscillator signal source, for example, 12.5 GHz to 18.33 GHz, which is input to the up-conversion module and the down-conversion module as their local oscillator source LO (75 GHz to 110 GHz) through the power divider 2022. The local oscillator signal Lo1 input to the up-converter is multiplied by 6 and mixed with the input IF to generate a radio frequency signal RF (75 GHz to 110 GHz). After being amplified by the driver amplifier 204, a signal with the same frequency and higher power is output. At this time, the low-frequency IF modulation signal is moved to a higher frequency (75 GHz to 110 GHz), generating a high-frequency vector signal; during the calibration process, the high-frequency vector signal is directly connected to Figure 3 During the test, the high-frequency vector signal is connected to the input end of the power amplifier to be tested, and the output end of the power amplifier to be tested is connected to the attenuator 2081 for down-conversion test, such as Figure 4 After the high frequency vector signal (75 GHz to 110 GHz) is attenuated by the power attenuator 2081 , it enters the down converter 2082 , is mixed with the local oscillator signal Lo2 of the down converter 2082 , and generates an IF (0 to 5 GHz) signal which is sent to the vector signal analyzer 205 .

[0104] The RF signal emitted by the vector signal source undergoes up-conversion and power amplification, resulting in link distortion. Through the spectrum analyzer FSW pre-distortion measurement and processing function, the link distortion data file is obtained as calibration compensation data, and then imported into the vector signal source for distortion calibration at each frequency point and power point. During calibration, the signal analyzer generates a direct pre-distortion DDPD file in the iqtar format, which is similar to XML. The data is DPD vector compensation, including amplitude and phase frequency response correction. The vector signal source can be imported for digital pre-distortion to reduce EVM.

[0105] After the calibration process is completed, the reference surface EVM is minimized to close to zero by playing the pre-distortion corrected data file, and then the target under test is connected and tested. The EVM value represents the performance of the target under test.

[0106] It should be understood that the size of the serial numbers of the steps in the above implementation does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation method of the present invention.

[0107] Figure 6 is a functional block diagram of a terminal provided by an embodiment of the present invention. Figure 6As shown, the terminal 6 of this embodiment includes: a processor 600 and a memory 601, wherein the memory 601 stores a computer program 602 that can be run on the processor 600. When the processor 600 executes the computer program 602, the steps in the above-mentioned power metering device operation and maintenance method and the embodiment are implemented, for example Figure 5 Steps 501 to 503 are shown.

[0108] Exemplarily, the computer program 602 may be divided into one or more modules / units, and the one or more modules / units are stored in the memory 601 and executed by the processor 600 to implement the present invention.

[0109] The terminal 6 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal 6 may include, but is not limited to, a processor 600 and a memory 601. Those skilled in the art will appreciate that Figure 6 It is only an example of terminal 6 and does not constitute a limitation on terminal 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0110] The processor 600 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0111] The memory 601 may be an internal storage unit of the terminal 6, such as a hard disk or memory of the terminal 6. The memory 601 may also be an external storage device of the terminal 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital card (SD), a flash card, etc. equipped on the terminal 6. Further, the memory 601 may also include both an internal storage unit of the terminal 6 and an external storage device. The memory 601 is used to store the computer program and other programs and data required by the terminal. The memory 601 may also be used to temporarily store data that has been output or is to be output.

[0112] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the implementation method can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method implementation method, which will not be repeated here.

[0113] In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0115] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0116] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0117] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0118] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned implementation method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned implementation methods of the vector error amplitude measurement method can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium.

[0119] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A vector error amplitude measurement device, characterized in that: include: Microwave source, vector source, up-conversion unit and signal analyzer; The microwave source and the vector source are respectively connected to the input end signal of the up-conversion unit; The signal analyzer is used to receive a second vector signal through an input terminal, and is used to output frequency response data indicative of the second vector signal; The output end of the up-conversion unit is used to output a first vector signal, wherein the second vector signal is generated based on the first vector signal, the vector source outputs a signal according to a frequency response data table, the first vector signal is generated based on the mixing of the output signal of the vector source and a frequency-doubled microwave source signal, the frequency response data table is generated according to a plurality of the frequency response data, and the frequency-doubled microwave source signal is a frequency-doubled signal of the output signal of the microwave source; in, The up-conversion unit comprises: A frequency multiplier, a frequency mixer, an isolator and a driving amplifier, wherein the input end of the frequency multiplier is signal-connected to the output end of the microwave source, the output end of the frequency multiplier and the output end of the vector source are respectively signal-connected to the input end of the frequency mixer, the output end of the frequency mixer is signal-connected to the input end of the isolator, and the output end of the isolator is signal-connected to the input end of the driving amplifier; The frequency multiplier generates a frequency multiplied signal of the output end signal of the microwave source, the mixer generates a mixed signal based on the output signal of the vector source and the frequency multiplied signal, and the driving amplifier generates the second vector signal by amplifying the mixed signal.

2. The vector error amplitude measuring device according to claim 1, characterized in that: The vector error amplitude measuring device also includes: A down-conversion unit, wherein an output terminal of the down-conversion unit is signal-connected to an input terminal of the signal analyzer; The input end of the down-conversion unit is used to input the third vector signal, and the output end of the down-conversion unit outputs the second vector signal, and the second vector signal is generated based on down-conversion of the third vector signal.

3. The vector error amplitude measuring device according to claim 2, characterized in that: The down-conversion unit comprises: An attenuator and a down converter, wherein the input end of the down converter is signal-connected to the output end of the attenuator, and the output end of the down converter is signal-connected to the input end of the signal analyzer; The attenuator input terminal is used to input the third vector signal, and the down-converter performs down-conversion according to the output of the attenuator to generate the second vector signal.

4. The vector error amplitude measuring device according to claim 3, characterized in that: The microwave source comprises: a microwave signal source and a power divider, wherein the microwave signal source is signal-connected to an input end of the power divider, and an output end of the power divider is signal-connected to the up-conversion unit and the down-conversion unit respectively; The power divider is used to distribute power of the local oscillator signal generated by the microwave signal source according to a preset value, and then transmit it to the up-conversion unit and the down-conversion unit. The up-conversion unit outputs the first vector signal based on the local oscillator signal and the output signal of the vector source, and the down-conversion unit outputs the second vector signal based on the local oscillator signal and the third vector signal.

5. A method for measuring vector error amplitude, characterized in that: The vector error amplitude measurement device as claimed in any one of claims 1 to 4 comprises: Based on multiple test points, the vector error amplitude measurement device is calibrated at multiple test points to obtain multiple frequency response data, wherein the multiple test points include different frequency points and different power points, and the vector error amplitude measurement device is not connected to the measured object during the calibration test; Generate calibration compensation data according to the plurality of frequency response data, input the calibration compensation data into the vector source, and calibrate the vector error amplitude measurement device; The target to be measured is connected to the vector error amplitude measurement device, and the target to be measured is tested based on multiple test points to obtain vector error amplitude data, wherein the multiple test points include different frequency points and different power points.

6. The method for measuring vector error amplitude according to claim 5, characterized in that: The vector error amplitude measurement device is tested based on multiple test points to obtain multiple frequency response data, including: For each frequency point and each power point, perform the following steps: Generate a first vector signal according to the frequency point and the power point; Obtaining a first vector error amplitude according to the second vector signal; Perform preprocessing according to the first vector error amplitude to generate a calibration file; The calibration file is added to a calibration file database.

7. The method for measuring vector error amplitude according to claim 5, characterized in that: Connecting the measured target to the vector error amplitude measurement device, testing the measured target based on multiple test points, and obtaining vector error amplitude data, including: For each frequency point and each power point, perform the following steps: Obtain the calibration file from the calibration file database according to the frequency point and the power point; generating a first vector signal according to the calibration file; Obtaining a second vector error amplitude according to the second vector signal; The second vector error magnitude is added to the vector error magnitude data.

8. A terminal comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 5 to 7 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method as claimed in any one of claims 5 to 7 are implemented.

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