CN113054919A - Method, device and equipment for testing digital predistortion signal feedback circuit - Google Patents
Method, device and equipment for testing digital predistortion signal feedback circuit Download PDFInfo
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- CN113054919A CN113054919A CN202110281607.1A CN202110281607A CN113054919A CN 113054919 A CN113054919 A CN 113054919A CN 202110281607 A CN202110281607 A CN 202110281607A CN 113054919 A CN113054919 A CN 113054919A
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Abstract
The application discloses a testing method, a device, equipment and a computer readable storage medium of a digital predistortion signal feedback circuit, which controls a predistortion processor of a predistortion exciter to be tested to work in a feedback through output mode after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, then tests the signal transmission quality of the predistortion signal feedback circuit to be tested by using the whole loop of the predistortion exciter to be tested, particularly obtains the test result of the predistortion signal feedback circuit to be tested by comparing an input first test signal and an output first output signal, thereby being capable of rapidly obtaining the signal transmission quality of the predistortion signal feedback circuit to be tested in real time without respectively testing all parts of the circuit of the predistortion signal feedback circuit to be tested and capturing test data to be derived for off-line analysis, the testing process of the digital predistortion signal feedback circuit is simplified, and the scale testing and the production are facilitated.
Description
Technical Field
The present application relates to the field of radio frequency transmission technologies, and in particular, to a method, an apparatus, a device, and a computer readable storage medium for testing a digital predistortion signal feedback circuit.
Background
A Power Amplifier (PA), also called power amplifier, is used to amplify a Radio Frequency (RF) signal to a required power and then transmit the signal through an antenna, and is an indispensable key component in a modern wireless communication system. However, the power amplifier has a nonlinear characteristic, and particularly in broadband communication, the power amplifier presents a memory effect, which seriously affects the normal transmission of the communication system. With the rapid development of wireless communication technology, the requirement on the linearity of power amplification is higher and higher.
The digital predistortion technology (DPD) is an important technology for realizing linearization of a power amplifier, and is based on the principle that a radio frequency signal input to the power amplifier is predistorted according to the nonlinearity of the power amplifier, so that the radio frequency signal to be amplified and an output signal of the power amplifier have good linearity. For the products supporting digital predistortion, the transmission quality of a predistortion signal feedback circuit and the quality of a predistortion algorithm play a decisive role in the final digital predistortion effect. The predistortion signal feedback circuit needs to truly acquire the signal output by the power amplifier without loss as much as possible so as to provide a calculation basis for a predistortion algorithm. On the premise that the predistortion algorithm is fixed, the quality of the predistortion feedback circuit index is the key for influencing the final predistortion effect.
Fig. 1 is a schematic diagram of a predistortion exciter operating in conjunction with a transmitter. As shown in fig. 1, the output terminal of the power amplifier 102 is connected to the transmitting antenna 103 to output the amplified rf signal. The predistortion exciter 101 with digital predistortion function receives the radio frequency feedback signal at the output end of the power amplifier 102, enters the predistortion processor for processing through a predistortion signal feedback circuit inside the predistortion exciter 101, and the partial data is only used for the corresponding calculation of a predistortion algorithm. The predistortion processor generates a modulated signal after predistortion processing according to the calculation result, and outputs a radio frequency signal to the power amplifier 102 after passing through the predistortion signal output circuit.
The existing test scheme of the digital predistortion signal feedback circuit needs to test index parameters of each part of circuits contained in the digital predistortion signal feedback circuit, but performance parameters of a down-conversion circuit and an analog-digital sampling circuit usually included in the predistortion signal feedback circuit cannot be simply and conveniently measured by an instrument, particularly parameters such as signal-to-noise ratio, distortion degree, out-of-band spurious and the like of an analog-digital conversion device and a circuit can only be analyzed off-line by a method of capturing data internally, manpower is consumed, a large amount of data needs to be captured, and the digital predistortion signal feedback circuit is not suitable for scale test and production.
Disclosure of Invention
The invention aims to provide a method, a device and equipment for testing a digital predistortion signal feedback circuit and a computer readable storage medium, which are used for realizing real-time analysis of the digital predistortion signal feedback circuit, simplifying the testing process of the digital predistortion signal feedback circuit and facilitating scale test and production.
In order to solve the above technical problem, the present application provides a method for testing a digital predistortion signal feedback circuit, including:
after the transmission quality of a predistortion signal output circuit of a predistortion exciter to be tested is determined to be qualified, controlling a predistortion processor of the predistortion exciter to be tested to work in a feedback through output mode, and then generating a first test signal by using a signal generator to input the first test signal into an input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested;
receiving a first output signal of the predistortion signal output circuit;
comparing the first output signal with the first test signal, and determining a test result of the pre-distortion signal feedback circuit to be tested according to a comparison result;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
Optionally, the comparing the first output signal with the first test signal, and determining the test result of the pre-distortion signal feedback circuit to be tested according to the comparison result specifically includes:
measuring an index parameter of the first output signal;
calculating a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal;
if all the first deviation values are within a first allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is qualified;
and if at least one first deviation value exceeds the first allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is unqualified.
Optionally, the first test signal is specifically a standard radio frequency signal;
correspondingly, the calculating a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal specifically includes:
and calculating a first deviation value between the index parameter of the first output signal and the standard index parameter of the standard radio frequency signal.
Optionally, the index parameters specifically include a modulation error ratio, a shoulder ratio, and a phase noise.
Optionally, the signal generator is specifically another exciter.
Optionally, the determining the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested specifically includes:
controlling the predistortion processor to generate a second test signal with known index parameters, and inputting the second test signal into the predistortion signal output circuit;
receiving a second output signal of the predistortion signal output circuit;
and comparing the second output signal with the second test signal, and determining the transmission quality of the predistortion signal output circuit according to the comparison result.
In order to solve the above technical problem, the present application further provides a testing apparatus for a digital predistortion signal feedback circuit, including:
the input control unit is used for controlling a predistortion processor of the predistortion exciter to be tested to work in a feedback through output mode after the transmission quality of a predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, and then generating a first test signal by using a signal generator to be input into the input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested;
a receiving unit for receiving a first output signal of the predistortion signal output circuit;
the comparison unit is used for comparing the first output signal with the first test signal and determining a test result of the pre-distortion signal feedback circuit to be tested according to a comparison result;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
In order to solve the above technical problem, the present application further provides a test system for a digital predistortion signal feedback circuit, including: the system comprises a signal generator, a signal measuring instrument and a test host;
the output end of the signal generator is connected with the input end of a pre-distortion signal feedback circuit to be tested of a pre-distortion exciter to be tested, and the input end of the signal measuring instrument is connected with the output end of a pre-distortion signal output circuit of the pre-distortion exciter to be tested;
the test host is respectively connected with the control end of the signal generator, the control end of the predistortion processor of the predistortion exciter to be tested and the output end of the signal measuring instrument, and is used for controlling the predistortion processor to work in a feedback through output mode after the transmission quality of the predistortion signal output circuit is determined to be qualified, then generating a first test signal by using the signal generator and inputting the first test signal into the input end of the predistortion signal feedback circuit to be tested, and determining the test result of the predistortion signal feedback circuit to be tested according to the comparison result of the signal measuring instrument comparing the first output signal of the predistortion signal output circuit with the first test signal;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
In order to solve the above technical problem, the present application further provides a testing apparatus for a digital predistortion signal feedback circuit, including:
a memory for storing instructions, the instructions comprising the steps of any one of the above methods for testing the digital predistortion signal feedback circuit;
a processor to execute the instructions.
To solve the above technical problem, the present application further provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the method for testing the digital predistortion signal feedback circuit as described in any one of the above.
The testing method of the digital predistortion signal feedback circuit provided by the application controls the predistortion processor of the predistortion exciter to be tested to work in a feedback through output mode after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, then utilizes the whole loop of the predistortion exciter to be tested to test the signal transmission quality of the predistortion signal feedback circuit to be tested, and particularly obtains the test result of the predistortion signal feedback circuit to be tested by comparing the input first test signal and the output first output signal, thereby being capable of quickly obtaining the signal transmission quality of the predistortion signal feedback circuit to be tested in real time, not needing to respectively test all parts of the circuit of the predistortion signal feedback circuit to be tested, not needing to capture test data to be exported for off-line analysis, and simplifying the testing process of the digital predistortion signal feedback circuit, is convenient for scale test and production.
The application also provides a testing device, equipment and computer readable storage medium of the digital predistortion signal feedback circuit, which have the beneficial effects and are not repeated herein.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a predistortion exciter operating in conjunction with a transmitter;
fig. 2 is a flowchart of a method for testing a digital predistortion signal feedback circuit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a testing apparatus of a digital predistortion signal feedback circuit according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a test system of a digital predistortion signal feedback circuit according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a testing apparatus of a digital predistortion signal feedback circuit according to an embodiment of the present application.
Detailed Description
The core of the application is to provide a method, a device, equipment and a computer readable storage medium for testing a digital predistortion signal feedback circuit, which are used for realizing real-time analysis of the digital predistortion signal feedback circuit, simplifying the testing process of the digital predistortion signal feedback circuit and facilitating scale test and production.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 2 is a flowchart of a method for testing a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 2, a method for testing a digital predistortion signal feedback circuit according to an embodiment of the present application includes:
s201: after the transmission quality of a predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, a predistortion processor of the predistortion exciter to be tested is controlled to work in a feedback through output mode, and then a first test signal is generated by a signal generator and is input to an input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested.
S202: a first output signal of the predistortion signal output circuit is received.
S203: and comparing the first output signal with the first test signal, and determining the test result of the pre-distortion signal feedback circuit to be tested according to the comparison result.
Referring to fig. 1, the pre-distortion exciter to be tested mainly includes a pre-distortion processor, a pre-distortion signal feedback circuit to be tested, and a pre-distortion signal output circuit. The input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit. The predistortion processor is typically a Field Programmable Gate Array (FPGA). The predistortion signal output circuit is used for outputting the radio frequency signal processed by the predistortion processor to the power amplifier, and mainly comprises a digital-to-analog conversion circuit and an up-conversion circuit, wherein the input end of the digital-to-analog conversion circuit is connected with the output end of the predistortion processor, the output end of the digital-to-analog conversion circuit is connected with the input end of the up-conversion circuit, and the output end of the up-conversion circuit is used for being connected with the input end of the power amplifier. The predistortion signal feedback circuit to be tested is used for collecting a radio frequency feedback signal at the output end of the power amplifier and sending the radio frequency feedback signal to the predistortion processor, so that the predistortion processor controls the predistortion processing of the radio frequency signal according to the radio frequency feedback signal and then controls the predistortion signal output circuit to output the radio frequency signal after the predistortion processing, the predistortion signal feedback circuit to be tested mainly comprises a down-conversion circuit and an analog-to-digital conversion circuit, in the conventional application, the down-conversion circuit is connected with a sampling point at the output end of the power amplifier, the output end of the down-conversion circuit is connected with the input end of the analog-to-digital conversion circuit, and the output end of the analog-to-digital conversion circuit. It is understood that, in practical applications, the predistortion signal output circuit and the predistortion signal feedback circuit have various forms and are not limited to the above-described forms, and the predistortion signal output circuit and the predistortion signal feedback circuit in these forms belong to the protection scope of the embodiments of the present application on the basis of the concept of testing the transmission quality of the predistortion signal feedback circuit by the internal loop of the predistortion exciter provided by the embodiments of the present application.
In the specific implementation, the test of the predistortion signal feedback circuit to be tested needs to be performed on the basis that the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is qualified, and if the transmission quality of the predistortion signal output circuit is unqualified, it can be determined that the predistortion exciter to be tested cannot be normally put into use, that is, the test of the predistortion signal feedback circuit to be tested is not needed any more.
For step S201, after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, the software of the predistortion processor of the predistortion exciter to be tested is modified, so that the predistortion processor operates in the feedback through output mode. The feedback through output mode is a working mode of the predistortion exciter, and particularly, the predistortion processor does not output own modulation signals, and the feedback signals acquired by the predistortion signal feedback circuit replace the original modulation signals to be directly output. On the premise that the performance of the predistortion signal output circuit is guaranteed, the signal output by the predistortion signal output circuit reflects the performance index of the predistortion signal feedback circuit to be tested. Therefore, after the predistortion processor of the predistortion exciter to be tested is controlled to work in the feedback through output mode, the signal generator is utilized to generate a first test signal to be input into the input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested. The signal generator is a separate signal source, preferably a signal generator that can emit a standard radio frequency signal, and another exciter (or another predistortion exciter) can be used.
For steps S202 and S203, a signal measuring instrument may be connected to the output of the predistortion signal output circuit to receive and measure the first output signal of the predistortion signal output circuit. The method for comparing the first output signal and the first test signal may be to compare the similarity of the waveforms of the first output signal and the first test signal, and calculate whether the index parameters of the first output signal and the first test signal are consistent. And if the similarity is within the allowable range or the deviation of each index is within the allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is qualified, otherwise, determining that the test result is unqualified.
The testing method of the digital predistortion signal feedback circuit provided by the embodiment of the application controls the predistortion processor of the predistortion exciter to be tested to work in the feedback through output mode after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, then utilizes the whole loop of the predistortion exciter to be tested to test the signal transmission quality of the predistortion signal feedback circuit to be tested, and specifically obtains the test result of the predistortion signal feedback circuit to be tested by comparing the input first test signal and the output first output signal, thereby being capable of rapidly obtaining the signal transmission quality of the predistortion signal feedback circuit to be tested in real time, being free from respectively testing all parts of the circuit of the predistortion signal feedback circuit to be tested, being free from capturing test data to be derived for off-line analysis, and simplifying the testing process of the digital predistortion signal feedback circuit, is convenient for scale test and production.
On the basis of the above embodiment, in the testing method of the digital predistortion signal feedback circuit provided in the embodiment of the present application, step S202 in fig. 2: comparing the first output signal with the first test signal, and determining a test result of the pre-distortion signal feedback circuit to be tested according to the comparison result, which may specifically include:
measuring an index parameter of the first output signal;
calculating a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal;
if all the first deviation values are within a first allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is qualified;
and if at least one first deviation value exceeds the first allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is unqualified.
In a specific implementation, several are selected as the indicators of the test according to the properties of the predistortion actuator. For example, the index parameters may specifically include a modulation error ratio, a shoulder ratio, phase noise, and the like. And measuring the index parameter of the first output signal through the signal measuring instrument, comparing the index parameter with the index parameter corresponding to the first test signal, and calculating a first deviation value.
And presetting a first allowable range corresponding to each index parameter, comparing each first deviation value with the corresponding first allowable range, and judging whether a first deviation value exceeding the first allowable range exists or not. And if so, determining that the test result of the pre-distortion signal feedback circuit to be tested is unqualified. And only if the first deviation values of the index parameters are within the corresponding first allowable range, the test result of the pre-distortion signal feedback circuit to be tested is considered to be qualified.
The first test signal may be a radio frequency signal arbitrarily generated by the signal generator, and at this time, the index parameter of the first test signal needs to be measured. In order to facilitate the test, the first test signal may be a standard radio frequency signal, i.e. a radio frequency signal whose index parameters all meet the standards in the field. Calculating a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal, specifically: a first deviation value between the index parameter of the first output signal and a standard index parameter of a standard radio frequency signal is calculated.
On the basis of the foregoing embodiment, in the method for testing a digital predistortion signal feedback circuit provided in the embodiment of the present application, the determining the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested in step S201 may specifically include:
controlling a predistortion processor to generate a second test signal with known index parameters, and inputting the second test signal into a predistortion signal output circuit;
receiving a second output signal of the predistortion signal output circuit;
and comparing the second output signal with the second test signal, and determining the transmission quality of the predistortion signal output circuit according to the comparison result.
In specific implementation, referring to the test method for the predistortion signal feedback circuit to be tested provided in the above embodiments of the present application, the transmission quality of the predistortion signal output circuit is first tested. The predistortion signal output circuit is arranged in a packaged predistortion exciter to be tested, so that a predistortion processor at the input end of the predistortion signal output circuit is required to generate a second test signal with known index parameters, the second test signal is input into the predistortion signal output circuit, the second output signal is received at the output end of the predistortion signal output circuit, specifically, the index parameters of the second output signal can be measured by a signal measuring instrument and compared with the index parameters of the second test signal, and the second deviation values of the index parameters of the second output signal and the corresponding index parameters of the second test signal are both in a corresponding second allowable range, so that the transmission quality of the predistortion signal output circuit is determined to be qualified, otherwise, the transmission quality of the predistortion signal output circuit is determined to be unqualified.
On the basis of the above detailed description of various embodiments corresponding to the testing method of the digital predistortion signal feedback circuit, the application also discloses a testing device, a system, a device and a computer readable storage medium of the digital predistortion signal feedback circuit corresponding to the above method.
Fig. 3 is a schematic structural diagram of a testing apparatus of a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 3, the testing apparatus for a digital predistortion signal feedback circuit according to the embodiment of the present application includes:
the input control unit 301 is configured to control the predistortion processor of the predistortion exciter to be tested to operate in the feedback through output mode after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, and then generate a first test signal by using the signal generator and input the first test signal into the input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested;
a receiving unit 302 for receiving a first output signal of the predistortion signal output circuit;
a comparison unit 303, configured to compare the first output signal with the first test signal, and determine a test result of the pre-distortion signal feedback circuit to be tested according to the comparison result;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
Since the embodiments of the apparatus portion and the method portion correspond to each other, please refer to the description of the embodiments of the method portion for the embodiments of the apparatus portion, which is not repeated here.
Fig. 4 is a schematic structural diagram of a test system of a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 4, a test system of a digital predistortion signal feedback circuit provided in the embodiment of the present application includes: a signal generator 401, a signal measuring instrument 402 and a test host 403;
the output end of the signal generator 401 is connected with the input end of a predistortion signal feedback circuit to be tested of the predistortion exciter 404 to be tested, and the input end of the signal measuring instrument 402 is connected with the output end of a predistortion signal output circuit of the predistortion exciter 404 to be tested;
the test host 403 is respectively connected with the control end of the signal generator 401, the control end of the predistortion processor of the predistortion exciter 404 to be tested and the output end of the signal measuring instrument 402, the test host 403 is used for controlling the predistortion processor to work in a feedback through output mode after the transmission quality of the predistortion signal output circuit is determined to be qualified, then the signal generator 401 is used for generating a first test signal to be input into the input end of the predistortion signal feedback circuit to be tested, and the test result of the predistortion signal feedback circuit to be tested is determined according to the comparison result of the signal measuring instrument 402 comparing the first output signal of the predistortion signal output circuit and the first test signal;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
Since the embodiment of the system part corresponds to the embodiment of the method part, the embodiment of the system part is described with reference to the embodiment of the method part, and is not repeated here.
Fig. 5 is a schematic structural diagram of a testing apparatus of a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 5, the testing apparatus for a digital predistortion signal feedback circuit provided in the embodiment of the present application includes:
a memory 510 for storing instructions comprising the steps of the method for testing a digital predistortion signal feedback circuit as described in any of the above embodiments;
a processor 520 for executing the instructions.
Among other things, processor 520 may include one or more processing cores, such as a 3-core processor, an 8-core processor, and so on. The processor 520 may be implemented in at least one hardware form of a Digital Signal Processing (DSP), a Field-Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), or a Programmable Logic Array (PLA). Processor 520 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a central Processing unit (cpu); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 520 may be integrated with an image processor GPU (graphics Processing unit) that is responsible for rendering and drawing the content that the display screen needs to display. In some embodiments, processor 520 may also include an Artificial Intelligence (AI) (artificial intelligence) processor for processing computational operations related to machine learning.
Memory 510 may include one or more computer-readable storage media, which may be non-transitory. Memory 510 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 510 is at least used for storing a computer program 511, wherein after the computer program 511 is loaded and executed by the processor 520, the relevant steps in the testing method of the digital predistortion signal feedback circuit disclosed in any one of the foregoing embodiments can be implemented. In addition, the resources stored in the memory 510 may also include an operating system 512, data 513, and the like, and the storage manner may be a transient storage or a permanent storage. The operating system 512 may be Windows, among others. Data 513 may include, but is not limited to, data involved with the above-described methods.
In some embodiments, the testing equipment of the digital predistortion signal feedback circuit may further comprise a display screen 530, a power supply 540, a communication interface 550, an input output interface 560, a sensor 570 and a communication bus 580.
Those skilled in the art will appreciate that the configuration shown in fig. 5 does not constitute a limitation of the test equipment of the digital predistortion signal feedback circuit and may include more or fewer components than those shown.
The test equipment for the digital predistortion signal feedback circuit provided by the embodiment of the application comprises the memory and the processor, and when the processor executes the program stored in the memory, the test method for the digital predistortion signal feedback circuit can be realized, and the effect is the same as that of the test method for the digital predistortion signal feedback circuit.
It should be noted that the above-described embodiments of the apparatus and device are merely illustrative, for example, the division of modules is only one division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form. Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium and executes all or part of the steps of the methods described in the embodiments of the present application, or all or part of the technical solutions.
To this end, the present application further provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the testing method such as the digital predistortion signal feedback circuit.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory ROM (Read-Only Memory), a random Access Memory ram (random Access Memory), a magnetic disk, or an optical disk.
The computer program contained in the computer-readable storage medium provided in this embodiment can implement the steps of the method for testing the digital predistortion signal feedback circuit as described above when being executed by the processor, and the effect is the same as above.
The present application provides a method, an apparatus, a system, a device and a computer readable storage medium for testing a digital predistortion signal feedback circuit. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device, the system, the equipment and the computer readable storage medium disclosed by the embodiment correspond to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A method for testing a digital predistortion signal feedback circuit, comprising:
after the transmission quality of a predistortion signal output circuit of a predistortion exciter to be tested is determined to be qualified, controlling a predistortion processor of the predistortion exciter to be tested to work in a feedback through output mode, and then generating a first test signal by using a signal generator to input the first test signal into an input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested;
receiving a first output signal of the predistortion signal output circuit;
comparing the first output signal with the first test signal, and determining a test result of the pre-distortion signal feedback circuit to be tested according to a comparison result;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
2. The method according to claim 1, wherein the comparing the first output signal with the first test signal and determining the test result of the pre-distorted signal feedback circuit to be tested according to the comparison result comprises:
measuring an index parameter of the first output signal;
calculating a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal;
if all the first deviation values are within a first allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is qualified;
and if at least one first deviation value exceeds the first allowable range, determining that the test result of the pre-distortion signal feedback circuit to be tested is unqualified.
3. The test method according to claim 2, wherein the first test signal is specifically a standard radio frequency signal;
correspondingly, the calculating a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal specifically includes:
and calculating a first deviation value between the index parameter of the first output signal and the standard index parameter of the standard radio frequency signal.
4. The test method according to claim 2, wherein the index parameters specifically include a modulation error ratio, a shouldered ratio and a phase noise.
5. The test method according to claim 1, characterized in that the signal generator is embodied as a further exciter.
6. The method according to claim 1, wherein the determining the transmission quality of the predistortion signal output circuit of the predistortion exciter under test specifically comprises:
controlling the predistortion processor to generate a second test signal with known index parameters, and inputting the second test signal into the predistortion signal output circuit;
receiving a second output signal of the predistortion signal output circuit;
and comparing the second output signal with the second test signal, and determining the transmission quality of the predistortion signal output circuit according to the comparison result.
7. A test apparatus for a digital predistortion signal feedback circuit, comprising:
the input control unit is used for controlling a predistortion processor of the predistortion exciter to be tested to work in a feedback through output mode after the transmission quality of a predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, and then generating a first test signal by using a signal generator to be input into the input end of the predistortion signal feedback circuit to be tested of the predistortion exciter to be tested;
a receiving unit for receiving a first output signal of the predistortion signal output circuit;
the comparison unit is used for comparing the first output signal with the first test signal and determining a test result of the pre-distortion signal feedback circuit to be tested according to a comparison result;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
8. A system for testing a digital predistortion signal feedback circuit, comprising: the system comprises a signal generator, a signal measuring instrument and a test host;
the output end of the signal generator is connected with the input end of a pre-distortion signal feedback circuit to be tested of a pre-distortion exciter to be tested, and the input end of the signal measuring instrument is connected with the output end of a pre-distortion signal output circuit of the pre-distortion exciter to be tested;
the test host is respectively connected with the control end of the signal generator, the control end of the predistortion processor of the predistortion exciter to be tested and the output end of the signal measuring instrument, and is used for controlling the predistortion processor to work in a feedback through output mode after the transmission quality of the predistortion signal output circuit is determined to be qualified, then generating a first test signal by using the signal generator and inputting the first test signal into the input end of the predistortion signal feedback circuit to be tested, and determining the test result of the predistortion signal feedback circuit to be tested according to the comparison result of the signal measuring instrument comparing the first output signal of the predistortion signal output circuit with the first test signal;
the input end of the predistortion processor is connected with the output end of the predistortion signal feedback circuit to be detected, and the output end of the predistortion processor is connected with the input end of the predistortion signal output circuit.
9. A test apparatus for a digital predistortion signal feedback circuit, comprising:
a memory for storing instructions, said instructions comprising the steps of a method of testing a digital predistortion signal feedback circuit as claimed in any one of claims 1 to 6;
a processor to execute the instructions.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for testing a digital predistortion signal feedback circuit as claimed in any one of the claims 1 to 6.
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