CN115219867A - Vector error amplitude measuring device and measuring method, terminal and storage medium - Google Patents

Abstract

The present invention relates to the technical field of modulation parameter measurement of wafer-level semiconductor devices, in particular to a vector error amplitude measurement device and measurement method, a terminal and a storage medium. The device is provided with an up-down conversion unit and a signal analyzer, based on the Analyze the signal deterioration degree, that is, the frequency response data, which is used to load the measured target after up and down conversion, and use 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 the EVM deterioration caused by the vector source. , which improves the measurement accuracy of EVM. In some application scenarios, the microwave source includes a microwave signal source and a power divider. After allocating power to the signal as needed, it is sent to the up-conversion unit and the down-conversion unit respectively, which reduces the complexity of the system and uses microwave signals. The number of sources is less, which can meet the test requirements of power amplifiers in the terahertz band, solve the problem that the existing measurement equipment and instruments cannot test the high-frequency DUT, and the analysis results obtained by the signal analyzer are more accurate.

Description

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

technical field

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

Background technique

Internationally, for the measurement of the vector error magnitude (EVM, Error Vector Magnitude) of power amplifiers in low frequency bands (such as below 50 GHz), the direct test method is usually still adopted by a vector signal generator and a vector signal analyzer (VSA, Vector SignalAnalyser). The research on vector signal analyzers in developed countries started earlier, and there are already some more mature products. Manufacturers of commonly used vector signal analyzers continue to invest in research and development on the basis of existing products. Although 85GHz vector signal analyzers have appeared one after another in recent years, the test of the adjacent channel power rejection ratio and vector error magnitude of power amplifiers in commercial systems at this stage is only 67GHz, which is mainly due to the fact that the maximum output frequency of the vector signal source is only 67GHz.

EVM is the vector difference between the ideal error-free signal and the actual transmitted signal at a given time. Since this value is constantly changing at each symbol change, EVM is defined as the root mean square value of the error vector over 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 obtained by sampling the RF signal after mapping the RF signal to the I/Q plane. Because before collecting discrete IQ data, a matched filter is passed to suppress out-of-band noise. Therefore, what affects the EVM the most is the nonlinear product of the transmit channel, especially the in-band distortion of the signal.

EVM is defined as the root mean square value of the ratio of the average error vector signal power to the average reference signal power:

In the formula, Sn is the discrete I/Q value obtained by sampling, _N is the total number of samples, and EVM _RMS is the root mean square value of the ratio of the average error vector signal power to the average reference signal power.

In some mmWave and THz applications, this frequency range is insufficient. A common frequency range extension method is to use a mixing up-conversion device to up-convert the output frequency to the desired millimeter-wave frequency band.

As shown in FIG. 1, FIG. 1 shows a millimeter wave vector source structure. During the application and implementation of such a solution, it is found that the upconverter and the driving will deteriorate the broadband signal quality of the microwave vector source. The EVM of the 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 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 predistorted. The amplitude and phase of the point are compensated and corrected, so that the modulation quality at the output of the driver can be optimized.

Based on this, it is necessary to develop and design a vector error magnitude measurement method for maintenance to solve the above-mentioned problem of signal deterioration of the microwave vector source.

SUMMARY OF THE INVENTION

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

In a first aspect, an embodiment of the present invention provides a vector error magnitude measurement device, including:

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

the microwave source and the vector source are respectively connected to the input terminal of the up-conversion unit;

The signal analyzer is used for receiving a second vector signal through an input terminal, and for outputting frequency response data indicating the second vector signal;

The output end of the up-conversion unit is used for outputting 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, and the first vector signal is The signal is generated based on the frequency multiplication signal of the output signal of the vector source and the output signal of the microwave source, and the frequency response data table is generated according to a plurality of the frequency response data.

In a possible implementation manner, the vector error magnitude measuring device further includes:

a down-conversion unit, the output end of the down-conversion unit is signal-connected to the input end of the signal analyzer;

The input end of the down-conversion unit is used for inputting a third vector signal, and the output end of the down-conversion unit outputs the second vector signal, and the second vector signal is generated by down-conversion based on the third vector signal.

In a possible implementation manner, the down-conversion unit includes:

an attenuator and a downconverter, the input end of the downconverter is signally connected to the output end of the attenuator, and the output end of the downconverter is signally connected to the input end of the signal analyzer;

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

In a possible implementation manner, the microwave source includes: a microwave signal source and a power divider, the microwave signal source is signally connected to the input end of the power divider, and the output end of the power divider is respectively connected to the power divider. The up-conversion unit and the down-conversion unit are signal-connected;

The power divider is used to distribute the 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, and the up-conversion unit is based on the local oscillator. The signal and the output signal of the vector source output the first vector signal, and the down-conversion unit outputs the second vector signal based on the local oscillator signal and the third vector signal.

In a possible implementation manner, the frequency up-conversion unit includes:

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

The frequency multiplier generates a frequency multiplied signal of the output signal of the microwave source, the mixer generates a frequency multiplied signal based on the output signal of the vector source and the frequency multiplied signal, and the drive amplifier is based on the The mixing signal is amplified to generate the second vector signal.

In a second aspect, an embodiment of the present invention provides a vector error magnitude measurement method, including:

Based on a plurality of test points, a calibration test is performed on the vector error magnitude measurement device at a plurality of test points, and a plurality of frequency response data are obtained, wherein the plurality of test points include different frequency points and different power points, and the calibration test is performed. The VEM measuring device described in the test is not connected to the target under test;

generating calibration compensation data according to the plurality of frequency response data, inputting the data to the vector source, and calibrating the vector error magnitude measuring device;

The measured target is connected to the VEM measurement device, and the measured target is tested based on a plurality of test points to obtain vector error amplitude data, wherein the plurality of test points include different frequency points and different power point.

In a possible implementation manner, the vector error magnitude 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:

generating a first vector signal according to the frequency point and the power point;

obtaining a first vector error magnitude according to the second vector signal;

Perform preprocessing according to the first vector error magnitude to generate a calibration file;

The calibration file is added to the calibration file database.

In a possible implementation manner, the measured target is connected to the VEM measurement device, and the measured target is tested based on a plurality of test points to obtain VEM 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 power point;

generating a first vector signal according to the calibration file;

obtaining a second vector error magnitude according to the second vector signal;

The second vector error magnitude is added to the vector error magnitude data.

In a third aspect, an embodiment of the present invention provides a terminal, including a memory and a processor, the memory stores a computer program that can be run on the processor, and the processor implements the above when executing the computer program The steps of the method described in the second aspect or any possible implementation manner of the second aspect.

In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the second aspect or any of the second aspect above. A possible implementation of the steps of the described method.

Compared with the prior art, the present invention has the following beneficial effects:

The embodiment of the present invention discloses a vector error magnitude measurement device, which is provided with an up-conversion unit and a signal analyzer. The frequency response data is used to correct the signal deterioration degree in the up-conversion and down-conversion of the vector signal, which greatly reduces the influence of the EVM deterioration caused by the vector source and improves the measurement accuracy of the EVM. In some application scenarios, the microwave source includes a microwave signal source and a power divider. After allocating power to the signal as required, it is sent to the up-conversion unit and the down-conversion unit respectively, which reduces the complexity of the system and uses microwave signals. The number of sources is smaller, the microwave signal source of up and down conversion is more consistent, and the analysis results obtained by the signal analyzer are more accurate.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

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

2 is a schematic diagram of a first vector error magnitude measuring device provided by an embodiment of the present invention;

3 is a schematic diagram of the second type of vector error magnitude measuring device provided by an embodiment of the present invention applied to a calibration process;

4 is a schematic diagram of the second vector error magnitude measurement device provided by the embodiment of the present invention applied to a measurement process;

5 is a flowchart of a vector error magnitude measurement method provided by an embodiment of the present invention;

FIG. 6 is a functional block diagram of a terminal provided by an embodiment of the present invention.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and techniques are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following descriptions will be given through specific embodiments in conjunction with the accompanying drawings.

The embodiments of the present invention are described in detail below. This example is implemented on the premise of the technical solution of the present invention, and provides detailed implementation modes and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments. .

FIG. 2 is a schematic diagram of a first vector error magnitude measuring device according to an embodiment of the present invention.

As shown in FIG. 2, it shows the principle diagram of the first vector error magnitude measurement device provided by the embodiment of the present invention, and the details are as follows:

A vector error magnitude measuring device, comprising:

microwave source 202, vector source 201, up-conversion unit 203 and signal analyzer 205;

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

The signal analyzer 205 is used for receiving a second vector signal through an input terminal, and for outputting frequency response data indicating the second vector signal;

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, and the first vector signal is generated based on the first vector signal. A vector signal is generated based on the frequency multiplication signal of the output signal of the vector source 201 and the output signal of the microwave source 202, and the frequency response data table is generated according to a plurality of the frequency response data.

Exemplarily, in order to test the adjacent channel rejection ratio and vector error magnitude parameters of the power amplifier in the terahertz frequency band (such as 75 GHz to 110 GHz), a vector signal source of 75 GHz to 110 GHz is required. A feasible solution is to move the low-frequency vector signal source to 75GHz-110GHz through the up-converter. Since the power amplifier to be tested requires high input power, the driver amplifier must also be selected. In order to prevent the signal backflow from damaging the upconverter and the vector signal source, the system also needs to connect the isolator 206 . The power of the output signal of the power amplifier to be tested is too high, and a power attenuator is required to connect to the signal analyzer. The introduction of the up-converter, the isolator 206 and the drive amplifier will degrade the vector signal EVM, so it is necessary to study the vector signal source predistortion technique to reduce the degradation of the EVM.

Therefore, the embodiments of the present invention provide a technical solution for solving the EVM deterioration of the vector signal, which affects the 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 RF signal analyzer is connected externally. The millimeter-wave mixer works in the linear region, and is calibrated in amplitude and phase before leaving the factory and built into the instrument. It can be used as a reference instrument to measure the signal sent by the vector source 201 through the up-converter and the drive amplifier 204 through the distortion measurement function. , obtain the in-band frequency response data table as the correction compensation value, including amplitude frequency response and phase frequency response. Upload the correction compensation data sheet to the vector source, and perform real-time distortion compensation on its baseband signal, which is the so-called predistortion process.

In specific application scenarios, one way is the pre-distortion function, which can use the built-in option of the signal analyzer, combined with the vector signal source to correct the data import function; it can also be replaced by a network analyzer to obtain the non-linear characteristics of the up-converter and drive amplifier. The linear distortion is used as the correction data to obtain the amplitude and phase amplitude curve data, and the frequency axis corresponds to the IF frequency.

In one structure, the VEM measuring device includes a vector source 201, a microwave source 202, an up-conversion unit 203, a signal analyzer 205, and in some scenarios, a drive amplifier 204 and/or an attenuator 2081.

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, the high-frequency signal needs to be amplified by the driving amplifier 204. Then, when the driving 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, and the high-frequency signal passing through the above channel is sent to the signal analyzer 205, and the When the frequency conversion unit 203 and other intermediate components are used, the degree of signal deterioration is usually the 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 removal or reduction of the vector signal is obtained. Signal EVM is degraded.

In some embodiments, the VEM measuring device further comprises:

a down-conversion unit 208, the output end of the down-conversion unit 208 is signal-connected to the input end of the signal analyzer 205;

The input terminal of the down-conversion unit 208 is used to input a third vector signal, and the output terminal of the down-conversion unit 208 outputs the second vector signal, and the second vector signal is generated based on the down-conversion of the third vector signal. .

In some embodiments, the down-conversion unit 208 includes:

An attenuator 2081 and a downconverter 2082, the input end of the downconverter 2082 is signal-connected with the output end of the attenuator 2081, and the output end of the downconverter 2082 is signaled with the input end of the signal analyzer 205 connect;

The input terminal 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.

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

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 then 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 .

Exemplarily, FIG. 3 shows a schematic diagram of the application of the second vector error magnitude measuring device provided in the embodiment of the present invention in a calibration process.

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

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 frequency.

In order to enable the vector signal before up-conversion and the vector signal after down-conversion to have the same frequency and reduce the number of applied microwave signal sources 2021, 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 the predetermined power, and sends them to the up-conversion unit 203 and the down-conversion unit 208 respectively, so as to realize the same-source up-conversion and down-conversion of the vector signal.

In some embodiments, the up-conversion unit 203 includes:

A frequency multiplier 2031, a mixer 2032, an isolator 206 and a drive amplifier 204. 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 The output terminals of the vector signal source are respectively connected to the input terminal of the mixer 2032, the output terminal of the mixer 2032 is connected to the input terminal of the isolator 206, and the output terminal of the isolator 206 is connected to the input terminal of the isolator 206. the signal connection of the input terminal of the driver amplifier 204;

The frequency multiplier 2031 generates a frequency multiplied signal of the output signal of the microwave source 202, the mixer 2032 generates a frequency multiplied signal based on the output signal of the vector source 201 and the frequency multiplied signal, and the drive Amplifier 204 generates the second vector signal based on amplifying the mixing signal.

Exemplarily, in some embodiments, the frequency up-conversion unit 203 includes a frequency multiplier 2031 , a frequency mixer 2032 , an isolator 206 and a drive amplifier 204 , and the frequency multiplier 2031 converts the signal from the microwave signal source 2021 of the power divider 2022 . After frequency multiplication, it is mixed with the vector signal in the mixer 2032 to realize up-conversion. In order to prevent signal backflow from damaging the upconverter and the vector signal source, an isolator 206 is connected to the system. Since the power amplifier to be tested requires high input power, a driving amplifier 204 is also provided. The signal output by the mixer 2032 is mixed, and after passing through the isolator 206 and the driving amplifier 204 in sequence, a radio frequency signal is output.

According to the embodiment of the vector error magnitude measurement device of the present invention, the up-conversion unit 203 and the signal analyzer 205 are provided. The frequency response data corrects the degree of signal deterioration in the up-conversion and down-conversion of the vector signal, which greatly reduces the influence of the EVM deterioration caused by the vector source 201 and improves the measurement accuracy of the EVM. In some application scenarios, the microwave source 202 includes a microwave signal source 2021 and a power divider 2022. After allocating power as required, the signals are sent to the up-conversion unit 203 and the down-conversion unit 208 respectively, which reduces the complexity of the system. , the number of microwave signal sources 2021 used is less, the up-conversion microwave signal sources 2021 are more consistent, and the analysis results obtained by the signal analyzer 205 are more accurate.

FIG. 4 provides a schematic diagram of the application of the second vector error magnitude measuring device in the measurement process, and FIG. 5 provides a flowchart of the vector error magnitude measuring method provided by the embodiment of the present invention. Combined with the two drawings, the second aspect, this Embodiments of the invention provide a vector error magnitude measurement method, including:

Based on a plurality of test points, perform a quasi-test on the vector error magnitude measurement device with a plurality of test points, and obtain a plurality of frequency response data, wherein the plurality of test points include different frequency points and different power points, and the calibration The VEM measuring device described in the test is not connected to the target under test;

generating calibration compensation data according to the plurality of frequency response data, inputting the data to the vector source, and calibrating the vector error magnitude measuring device;

The measured target is connected to the VEM measurement device, and the measured target is tested based on a plurality of test points to obtain vector error amplitude data, wherein the plurality of test points include different frequency points and different power point.

In a possible implementation manner, the vector error magnitude 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:

generating a first vector signal according to the frequency point and the power point;

obtaining a first vector error magnitude according to the second vector signal;

Perform preprocessing according to the first vector error magnitude to generate a calibration file;

The calibration file is added to the calibration file database.

In a possible implementation manner, the measured target is connected to the VEM measurement device, and the measured target is tested based on a plurality of test points to obtain VEM 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 power point;

generating a first vector signal according to the calibration file;

obtaining a second vector error magnitude according to the second vector signal;

The second vector error magnitude is added to the vector error magnitude data.

Exemplarily, taking the test method with the down-conversion unit as an example, in a specific application scenario, the signal analyzer 205 has the function of millimeter wave predistortion test and compensation. The upper computer, the signal source and the signal analyzer 205 communicate through a network cable.

The vector source 201 provides an IF modulation signal, for example, intermediate frequency IF 0-5 GHz, selects a modulation method (such as 4PSK, filter, code rate), and generates a modulation bandwidth. The vector source 201 has the function of frequency response correction within the modulation bandwidth. The microwave signal source 2021 generates a continuous radio frequency local oscillator signal source, such as 12.5GHz-18.33GHz, which is input to the up-conversion module and the down-conversion module through the power divider 2022 as its local oscillator source LO (75GHz-110GHz). After the local oscillator signal Lo1 input by the up-converter is multiplied by 6, it is mixed with the input IF to generate a radio frequency signal RF (75GHz-110GHz), which is amplified by the drive amplifier 204 and then outputs a signal with higher power at the same frequency. At this time, the low frequency band The IF modulated signal is moved to a higher frequency (75GHz ~ 110GHz), resulting in a high-frequency vector signal; during the calibration process, the high-frequency vector signal is directly connected to the attenuator 2081 in Figure 3 for down-conversion calibration; during the test process , the high-frequency vector signal is connected to the input end of the power amplifier under test, and the output end of the power amplifier under test is connected to the attenuator 2081 for down-conversion test, as shown in FIG. 4 . After the high frequency vector signal (75GHz～110GHz) is attenuated by the power attenuator 2081, it enters the downconverter 2082, and is mixed with the local oscillator signal Lo2 of the downconverter 2082 to generate an IF (0～5GHz) signal and send it to the vector Signal analyzer 205.

The RF signal emitted by the vector signal source undergoes up-conversion and power amplification, and the link distortion occurs. Through the FSW pre-distortion measurement and processing function of the spectrum analyzer, the data file of the link distortion is obtained as the calibration compensation data, and then the vector is imported by frequency point and power point. Distortion calibration of the signal source. The signal analyzer generates a direct predistortion DDPD file during calibration, the format is iqtar, similar to XML, and the data is DPD vector compensation, including amplitude and phase frequency response correction. You can import a vector signal source for digital pre-distortion to reduce EVM.

After the above calibration process is completed, the EVM of the reference plane is minimized to be close to zero by playing the predistortion-corrected data file, and then the connection and testing of the target under test are performed. The EVM value represents the performance of the target under test.

It should be understood that the size of the sequence numbers of the steps in the above embodiments does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

FIG. 6 is a functional block diagram of a terminal provided by an embodiment of the present invention. As shown in FIG. 6 , the terminal 6 in this embodiment includes: a processor 600 and a memory 601 , and the memory 601 stores a computer program 602 that can run on the processor 600 . When the processor 600 executes the computer program 602 , the steps in each of the above-mentioned methods and implementations for the operation and maintenance of power metering equipment are implemented, for example, steps 501 to 503 shown in FIG. 5 .

Exemplarily, the computer program 602 can 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 complete the this invention.

The terminal 6 may be a computing device such as a desktop computer, a notebook, a palmtop computer, and 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 can understand that FIG. 6 is only an example of the terminal 6, and does not constitute a limitation on the terminal 6. It may include more or less components than the one shown in the figure, or combine some components, or different components, such as The terminal may also include input and output devices, network access devices, buses, and the like.

The so-called processor 600 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (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 the processor may be any conventional processor or the like.

The memory 601 may be an internal storage unit of the terminal 6 , such as a hard disk or a 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 memory card (Smart Media Card, SMC), a secure digital card (Secure Digital, SD) equipped on the terminal 6, Flash card (Flash Card) and so on. 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 can also be used to temporarily store data that has been output or will be output.

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 practical applications, the above-mentioned functions can be allocated to different functional units, Module completion, that is, dividing the internal structure of the device into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the implementation manner may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit, and the above-mentioned integrated units may adopt hardware. It can also be realized 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 from each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the above-mentioned system, reference may be made to the corresponding process in the foregoing method embodiments, which will not be repeated here.

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

Those of ordinary skill in the art can realize 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. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In the embodiments provided by the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the device/terminal implementations described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other divisions, such as multiple units or Components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this implementation manner.

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 alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated modules/units, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the processes in the methods of the above embodiments, 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, and the computer When the program is executed by the processor, it can implement the steps of each of the above-mentioned embodiments of the vector error magnitude measurement method. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, Read-Only Memory (ROM) , Random Access Memory (Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that the above-mentioned embodiments can still be used for Modifications are made to the technical solutions recorded in the method, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should be included in the within the protection scope of the present invention.

Claims (10)

1. a vector error magnitude measuring device, is characterized in that, comprises: Microwave source, vector source, up-conversion unit and signal analyzer; the microwave source and the vector source are respectively connected to the input terminal of the up-conversion unit; The signal analyzer is used for receiving a second vector signal through an input terminal, and for outputting frequency response data indicating the second vector signal; The output end of the up-conversion unit is used for outputting 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, and the first vector signal is The signal is generated based on the frequency multiplication signal of the output signal of the vector source and the output signal of the microwave source, and the frequency response data table is generated according to a plurality of the frequency response data. 2. The VEM measuring device according to claim 1, wherein the VEM measuring device further comprises: a down-conversion unit, the output end of the down-conversion unit is signal-connected to the input end of the signal analyzer; The input end of the down-conversion unit is used for inputting a third vector signal, and the output end of the down-conversion unit outputs the second vector signal, and the second vector signal is generated by down-conversion based on the third vector signal. 3. The vector error magnitude measuring device according to claim 2, wherein the down-conversion unit comprises: an attenuator and a downconverter, the input end of the downconverter is signally connected to the output end of the attenuator, and the output end of the downconverter is signally connected to the input end of the signal analyzer; The input terminal of the attenuator is used for inputting the third vector signal, and the down-converter performs frequency down-conversion according to the output of the attenuator to generate the second vector signal. 4 . The vector error magnitude measuring device according to claim 3 , wherein the microwave source comprises: a microwave signal source and a power divider, wherein the microwave signal source is signal-connected to the input end of the power divider, so that the The output ends of the power divider are respectively connected to the up-conversion unit and the down-conversion unit in signal; The power divider is used to distribute the 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, and the up-conversion unit is based on the local oscillator. The signal and the output signal of the vector source output the first vector signal, and the down-conversion unit outputs the second vector signal based on the local oscillator signal and the third vector signal. 5. The vector error magnitude measuring device according to any one of claims 1-4, wherein the up-conversion unit comprises: A frequency multiplier, a mixer, an isolator and a drive amplifier, the input end of the frequency multiplier is signal-connected to the output end of the microwave source, and the output end of the frequency multiplier and the output end of the vector signal source are respectively is 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 drive amplifier; The frequency multiplier generates a frequency multiplied signal of the output signal of the microwave source, the mixer generates a frequency multiplied signal based on the output signal of the vector source and the frequency multiplied signal, and the drive amplifier is based on the The mixing signal is amplified to generate the second vector signal. 6. A method for measuring the magnitude of vector error, characterized in that, applied to the device for measuring the magnitude of vector error as described in any one of claims 1-5, comprising: Based on a plurality of test points, a calibration test is performed on the vector error magnitude measurement device at a plurality of test points, and a plurality of frequency response data are obtained, wherein the plurality of test points include different frequency points and different power points, and the calibration test is performed. The VEM measuring device described in the test is not connected to the target under test; generating calibration compensation data according to the plurality of frequency response data, inputting the data to the vector source, and calibrating the vector error magnitude measuring device; The measured target is connected to the VEM measurement device, and the measured target is tested based on a plurality of test points to obtain vector error amplitude data, wherein the plurality of test points include different frequency points and different power point. 7. The VEM measurement method according to claim 6, wherein the VEM measurement device is tested based on a plurality of test points, and a plurality of frequency response data are obtained, comprising: For each frequency point and each power point, perform the following steps: generating a first vector signal according to the frequency point and the power point; obtaining a first vector error magnitude according to the second vector signal; Perform preprocessing according to the first vector error magnitude to generate a calibration file; The calibration file is added to the calibration file database. 8. The method for measuring VEM according to claim 6, wherein the measured target is connected to the VEM measuring device, and based on a plurality of test points, the measured target is tested to obtain Vector error margin 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 power point; generating a first vector signal according to the calibration file; obtaining a second vector error magnitude according to the second vector signal; The second vector error magnitude is added to the vector error magnitude data. 9. A terminal comprising a memory and a processor, wherein a computer program that can be run on the processor is stored in the memory, wherein the processor implements claim 6 when executing the computer program to the steps of any one of 8. 10. A computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, the method according to any one of the preceding claims 6 to 8 is implemented A step of.

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