CN113054919B - 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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- CN113054919B CN113054919B CN202110281607.1A CN202110281607A CN113054919B CN 113054919 B CN113054919 B CN 113054919B CN 202110281607 A CN202110281607 A CN 202110281607A CN 113054919 B CN113054919 B CN 113054919B
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Abstract
The application discloses a test method, a device, equipment and a computer readable storage medium of a digital predistortion signal feedback circuit, wherein after the transmission quality of a predistortion signal output circuit of a 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, then the signal transmission quality of the predistortion signal feedback circuit to be tested is tested by utilizing the whole loop of the predistortion exciter to be tested, and the test result of the predistortion signal feedback circuit to be tested is obtained by comparing an input first test signal with an output first output signal.
Description
Technical Field
The present invention 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 a power amplifier, is used to amplify a Radio Frequency (RF) signal to a required power, and then transmit the signal through an antenna, which is an essential component in a modern wireless communication system. However, the power amplifier has nonlinear characteristics, especially in broadband communication, the power amplifier presents a memory effect, and the normal transmission of the communication system is seriously affected. With the rapid development of wireless communication technology, the linearity requirement on the power amplifier is higher and higher.
The digital predistortion technology (DPD) is an important technology for realizing linearization of a power amplifier, and the principle is that the predistortion processing is performed on a radio frequency signal input to the power amplifier 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 show good linearity. For products supporting digital predistortion, the quality of the transmission quality of the predistortion signal feedback circuit and the quality of the predistortion algorithm play a decisive role in the effect of final digital predistortion. The predistortion signal feedback circuit needs to collect the signal output by the power amplifier as practically as possible without loss so as to provide calculation basis for the predistortion algorithm. On the premise of fixed predistortion algorithm, 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, an output terminal of the power amplifier 102 is connected to the transmitting antenna 103 to output an amplified radio frequency signal. The predistortion exciter 101 with digital predistortion function receives the radio frequency feedback signal at the output end of the power amplifier 102, and the radio frequency feedback signal 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 corresponding calculation by a predistortion algorithm. The predistortion processor generates a predistortion processed modulation signal 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 prior testing scheme of the digital predistortion signal feedback circuit needs to test index parameters of all partial circuits contained in the digital predistortion signal feedback circuit, but the performance parameters of a down-conversion circuit and an analog-digital sampling circuit which are usually contained in the predistortion signal feedback circuit cannot be simply and directly measured by an instrument, especially the parameters such as signal-to-noise ratio, distortion degree, out-of-band spurious and the like of the analog-digital conversion device and the circuit can only be analyzed offline by a method of capturing data internally, which consumes manpower and needs to capture a large amount of data, and is not suitable for large-scale testing and production.
Disclosure of Invention
The invention aims to provide a testing method, a testing device, testing equipment and a computer readable storage medium for a digital predistortion signal feedback circuit, which are used for realizing real-time analysis of the digital predistortion signal feedback circuit, simplifying the testing flow of the digital predistortion signal feedback circuit and facilitating scale test and production.
In order to solve the above technical problems, 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 measured is determined to be qualified, controlling a predistortion processor of the predistortion exciter to be measured to work in a feedback through output mode, and then generating a first test signal by using a signal generator to be input into an input end of a predistortion signal feedback circuit of the predistortion exciter to be measured;
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 predistortion 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.
Optionally, the comparing the first output signal with the first test signal, and determining the test result of the predistortion 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 the first deviation values are in a first allowable range, determining that the test result of the predistortion 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 predistortion 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:
a first deviation value between an index parameter of the first output signal and a standard index parameter of the standard radio frequency signal is calculated.
Optionally, the index parameter specifically includes a modulation error ratio, a shoulder ratio, and phase noise.
Optionally, the signal generator is embodied as another exciter.
Optionally, the measuring the transmission quality of the predistortion signal output circuit of the predistortion exciter to be measured 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 a comparison result.
In order to solve the above technical problem, the present application further provides a testing device for a digital predistortion signal feedback circuit, including:
the input control unit is used for controlling the predistortion processor of the predistortion exciter to work in a feedback through output mode after determining that the transmission quality of a predistortion signal output circuit of the predistortion exciter to be detected is qualified, and then generating a first test signal by using a signal generator and inputting the first test signal into the input end of the predistortion signal feedback circuit of the predistortion exciter to be detected;
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 predistortion 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 predistortion signal feedback circuit of the predistortion exciter to be detected, and the input end of the signal measuring instrument is connected with the output end of a predistortion signal output circuit of the predistortion exciter to be detected;
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 determining that the transmission quality of the predistortion signal output circuit is qualified, then generating a first test signal by 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 and the first output signal of the predistortion 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.
In order to solve the above technical problem, the present application further provides a test device for a digital predistortion signal feedback circuit, including:
a memory for storing instructions, the instructions comprising the steps of the method for testing a digital predistortion signal feedback circuit as described in any one of the above;
and the processor is used for executing 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, the computer program implementing the steps of the method for testing a digital predistortion signal feedback circuit according to any one of the above when being executed by a processor.
According to the test method for the digital predistortion signal feedback circuit, after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, the predistortion processor of the predistortion exciter to be tested is controlled to work in the feedback through output mode, then the signal transmission quality of the predistortion signal feedback circuit to be tested is tested by using the whole loop of the predistortion exciter to be tested, and the test result of the predistortion signal feedback circuit to be tested is obtained by comparing the input first test signal with the output first output signal, so that the signal transmission quality of the predistortion signal feedback circuit to be tested can be obtained in real time and quickly, the test of all part circuits of the predistortion signal feedback circuit to be tested is not required, the offline analysis is not required to be performed by grabbing test data, the test flow of the digital predistortion signal feedback circuit is simplified, and the scale test and the production are convenient.
The application further provides a testing device, equipment and a computer readable storage medium of the digital predistortion signal feedback circuit, which have the beneficial effects and are not repeated here.
Drawings
For a clearer description of embodiments of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description that follow are only some embodiments of the present application, and that other drawings may be obtained from these drawings by a person of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic diagram of a predistortion exciter operating in conjunction with a transmitter;
fig. 2 is a flowchart of a test method of a digital predistortion signal feedback circuit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a testing device 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 test device 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 testing method, a testing device, testing equipment and a computer readable storage medium of a digital predistortion signal feedback circuit, which are used for realizing real-time analysis of the digital predistortion signal feedback circuit, simplifying the testing flow of the digital predistortion signal feedback circuit and facilitating scale test and production.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Fig. 2 is a flowchart of a testing method of a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 2, the test method for the digital predistortion signal feedback circuit provided in the embodiment of the application includes:
s201: after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be measured is determined to be qualified, controlling a predistortion processor of the predistortion exciter to be measured to work in a feedback through output mode, 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 of the predistortion exciter to be measured.
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 a test result of the predistortion signal feedback circuit to be tested according to the comparison result.
Referring to fig. 1, it can be seen that the predistortion exciter to be measured mainly includes a predistortion processor, a predistortion signal feedback circuit to be measured and a predistortion 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 (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 measured is used for collecting the 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 measured 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 of 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 is connected with the input end of the predistortion processor. It will be appreciated that in practical applications, the predistortion signal output circuit and the predistortion signal feedback circuit have various forms, not limited to the forms described above, and the predistortion signal output circuit and the predistortion signal feedback circuit in these forms are all within the protection scope of the embodiments of the present application based on the concept of testing the transmission quality of the predistortion signal feedback circuit with the predistortion exciter internal loop provided in the embodiments of the present application.
In specific implementation, the test of the predistortion signal feedback circuit to be tested is required 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 not qualified, 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 required.
For step S201, after determining that the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is acceptable, software of the predistortion processor of the predistortion exciter to be tested is modified to make the predistortion processor work in the feedback pass-through output mode. The feedback through output mode is a working mode of the predistortion exciter, specifically, the predistortion processor does not output a modulating signal of the predistortion processor, and the feedback signal collected by the predistortion signal feedback circuit replaces the original modulating signal to be through 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 detected. Therefore, after the predistortion processor controlling the predistortion exciter to be tested works in the feedback through output mode, a signal generator is utilized to generate a first test signal which is input into the input end of the predistortion signal feedback circuit of the predistortion exciter to be tested. The signal generator is a single signal source, preferably a signal generator that emits a standard radio frequency signal, and may employ another exciter (or another predistortion exciter).
For step S202 and step 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, calculate whether the index parameters of the first output signal and the first test signal are consistent, and so on. If the similarity is in the allowable range or the deviation of each index is in the allowable range, the test result of the predistortion signal feedback circuit to be tested is considered to be qualified, otherwise, the test result is not qualified.
According to the test method for the digital predistortion signal feedback circuit, after the transmission quality of the predistortion signal output circuit of the predistortion exciter to be tested is determined to be qualified, the predistortion processor of the predistortion exciter to be tested is controlled to work in a feedback through output mode, then the signal transmission quality of the predistortion signal feedback circuit to be tested is tested by using the whole loop of the predistortion exciter to be tested, and the test result of the predistortion signal feedback circuit to be tested is obtained by comparing the input first test signal with the output first output signal.
Based on the foregoing embodiments, in the method for testing a digital predistortion signal feedback circuit provided in the embodiments 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 predistortion signal feedback circuit to be tested according to the comparison result, wherein the method specifically comprises the following steps:
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 in the first allowable range, determining that the test result of the predistortion signal feedback circuit to be tested is qualified;
if at least one first deviation value exceeds a first allowable range, determining that the test result of the predistortion signal feedback circuit to be tested is unqualified.
In a specific implementation, several are selected as indicators of the test according to the nature of the predistortion exciter. For example, the index parameter may specifically include a modulation error ratio, a shoulder ratio, phase noise, and the like. And measuring index parameters of the first output signal through a signal measuring instrument, comparing the index parameters with the index parameters corresponding to the first test signal, and calculating a first deviation value.
The first allowable range corresponding to each index parameter is preset, so that each first deviation value is compared with the corresponding first allowable range, and whether the first deviation value exceeding the first allowable range exists or not is judged. If so, the test result of the predistortion signal feedback circuit to be tested is considered as unqualified. And only if the first deviation values of all index parameters are in the corresponding first allowable range, the test result of the predistortion 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 the index parameter of the first test signal needs to be measured at this time. For convenience of testing, the first test signal may be a standard radio frequency signal, i.e. a radio frequency signal with all index parameters meeting the standards in the field. Then a first deviation value between the index parameter of the first output signal and the index parameter of the first test signal is calculated, specifically: a first deviation value between an index parameter of the first output signal and a standard index parameter of the 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 measuring transmission quality of the predistortion signal output circuit of the predistortion exciter to be measured in step S201 may specifically include:
controlling the predistortion processor to generate a second test signal with known index parameters to be input 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 a specific implementation, referring to the test method for the predistortion signal feedback circuit to be tested provided in the above embodiment of the present application, first, the transmission quality of the predistortion signal output circuit is tested. The predistortion signal output circuit is in the packaged predistortion exciter to be tested, so that a predistortion processor at the input end of the predistortion signal output circuit is required to be used for generating a second test signal with known index parameters to be input into the predistortion signal output circuit, the second output signal is received at the output end of the predistortion signal output circuit, the index parameters of the second output signal can be measured by a signal measuring instrument, the index parameters of the second output signal are compared with the index parameters of the second test signal, the index parameters of the second output signal and the second deviation values of the index parameters of the corresponding second test signal are in the corresponding second allowable range, and 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.
Various embodiments of a method for testing a digital predistortion signal feedback circuit are detailed above, and on the basis of the above, the application also discloses a device, a system, a device and a computer readable storage medium for testing the digital predistortion signal feedback circuit, which correspond to the method.
Fig. 3 is a schematic structural diagram of a testing device of a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 3, a testing device for a digital predistortion signal feedback circuit provided in an embodiment of the present application includes:
an input control unit 301, configured to control, after determining that a transmission quality of a predistortion signal output circuit of a predistortion exciter to be tested is qualified, a predistortion processor of the predistortion exciter to be tested to operate in a feedback pass-through output mode, and then generate a first test signal by using a signal generator, and input the first test signal to an input end of a predistortion signal feedback circuit of the predistortion exciter to be tested;
a receiving unit 302 for receiving a first output signal of the predistortion signal output circuit;
a comparing unit 303, configured to compare the first output signal with the first test signal, and determine a test result of the predistortion 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 embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
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 for a digital predistortion signal feedback circuit provided in an 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 measured of the predistortion exciter 404 to be measured, 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 measured;
the test host 403 is respectively connected with a control end of the signal generator 401, a control end of a predistortion processor of the predistortion exciter 404 to be tested and an output end of the signal measuring instrument 402, and the test host 403 is used for controlling the predistortion processor to work in a feedback through output mode after determining that the transmission quality of the predistortion signal output circuit is qualified, then generating a first test signal by the signal generator 401 and inputting the first test signal into an input end of the predistortion signal feedback circuit to be tested, and determining a test result of the predistortion signal feedback circuit to be tested according to the comparison result of the signal measuring instrument 402 to 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 embodiments of the system portion and the embodiments of the method portion correspond to each other, the embodiments of the system portion refer to the description of the embodiments of the method portion, which is not repeated herein.
Fig. 5 is a schematic structural diagram of a test device of a digital predistortion signal feedback circuit according to an embodiment of the present application.
As shown in fig. 5, a test apparatus for a digital predistortion signal feedback circuit provided in an embodiment of the present application includes:
a memory 510 for storing instructions including the steps of the method for testing a digital predistortion signal feedback circuit according to any of the embodiments described above;
a processor 520 for executing the instructions.
Processor 520 may include one or more processing cores, such as a 3-core processor, an 8-core processor, etc., among others. The processor 520 may be implemented in at least one hardware form of digital signal processing DSP (Digital Signal Processing), field programmable gate array FPGA (Field-Programmable Gate Array), programmable logic array PLA (Programmable Logic Array). Processor 520 may also include a main processor, which is a processor for processing data in an awake state, also referred to as central processor CPU (Central Processing Unit), and a coprocessor; 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), a GPU for use in responsible for rendering and rendering of the content required for display by the display screen. In some embodiments, the processor 520 may also include an artificial intelligence AI (Artificial Intelligence) processor for processing computing 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, where the computer program 511 can implement relevant steps in the method for testing a digital predistortion signal feedback circuit disclosed in any of the foregoing embodiments after being loaded and executed by the processor 520. In addition, the resources stored in the memory 510 may further include an operating system 512, data 513, and the like, where the storage manner may be transient storage or permanent storage. The operating system 512 may be Windows. The data 513 may include, but is not limited to, data related to the methods described above.
In some embodiments, the test equipment of the digital predistortion signal feedback circuit may further comprise a display 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 testing apparatus of the digital predistortion signal feedback circuit and may include more or fewer components than shown.
The test device for the digital predistortion signal feedback circuit comprises a memory and a processor, wherein the processor can realize the test method for the digital predistortion signal feedback circuit when executing a program stored in the memory, and the test method has the same effects as the test device.
It should be noted that the apparatus and device embodiments described above are merely exemplary, and for example, the division of modules is merely a logic function division, and there may be other division manners in actual implementation, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms. The modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over 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 this embodiment.
In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
The integrated modules, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. With such understanding, the technical solution of the present application, or a part contributing to the prior art or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application.
To this end, embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements steps of a test method, such as a digital predistortion signal feedback circuit.
The computer readable storage medium may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (ram) RAM (Random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The computer program included in the computer readable storage medium provided in this embodiment can implement the steps of the method for testing a digital predistortion signal feedback circuit as described above when executed by a processor.
The above describes in detail a method, apparatus, system, device and computer readable storage medium for testing a digital predistortion signal feedback circuit provided in the present application. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. The apparatus, system, device and computer readable storage medium of the embodiments disclosed herein are relatively simple to describe, and reference should be made to the description of the method section for the relevant points, since they correspond to the methods of the embodiments disclosed herein. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this 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. Moreover, 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 one … …" does not exclude the presence of other like 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 measured is determined to be qualified, controlling a predistortion processor of the predistortion exciter to be measured to work in a feedback through output mode, and then generating a first test signal by using a signal generator to be input into an input end of a predistortion signal feedback circuit of the predistortion exciter to be measured;
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 predistortion 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.
2. The method according to claim 1, wherein comparing the first output signal with the first test signal, and determining the test result of the predistortion signal feedback circuit to be tested according to the comparison result, specifically 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 the first deviation values are in a first allowable range, determining that the test result of the predistortion 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 predistortion signal feedback circuit to be tested is unqualified.
3. The test method according to claim 2, wherein the first test signal is in particular 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:
a first deviation value between an index parameter of the first output signal and a standard index parameter of the standard radio frequency signal is calculated.
4. The test method according to claim 2, wherein the index parameters include in particular a modulation error ratio, a shoulder ratio and a phase noise.
5. Test method according to claim 1, characterized in that the signal generator is embodied as a further actuator.
6. The test method according to claim 1, wherein the measuring 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 a comparison result.
7. A test apparatus for a digital predistortion signal feedback circuit, comprising:
the input control unit is used for controlling the predistortion processor of the predistortion exciter to work in a feedback through output mode after determining that the transmission quality of a predistortion signal output circuit of the predistortion exciter to be detected is qualified, and then generating a first test signal by using a signal generator and inputting the first test signal into the input end of the predistortion signal feedback circuit of the predistortion exciter to be detected;
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 predistortion 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 test system for 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 predistortion signal feedback circuit of the predistortion exciter to be detected, and the input end of the signal measuring instrument is connected with the output end of a predistortion signal output circuit of the predistortion exciter to be detected;
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 determining that the transmission quality of the predistortion signal output circuit is qualified, then generating a first test signal by 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 and the first output signal of the predistortion 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.
9. A test apparatus for a digital predistortion signal feedback circuit, comprising:
a memory for storing instructions comprising the steps of the method of testing a digital predistortion signal feedback circuit of any of claims 1 to 6;
and the processor is used for executing the instructions.
10. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor realizes the steps of a method of testing a digital predistortion signal feedback circuit according to any of claims 1 to 6.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8666336B1 (en) * | 2012-08-16 | 2014-03-04 | Xilinx, Inc. | Digital pre-distortion with model-based order estimation |
| CN108738122A (en) * | 2018-04-03 | 2018-11-02 | 京信通信***（中国）有限公司 | Digital pre-distortion power amplifying calibrating method, system and digital predistortion apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4755651B2 (en) * | 2005-10-17 | 2011-08-24 | 株式会社日立国際電気 | Nonlinear distortion detection method and distortion compensation amplification apparatus |
| CN100556015C (en) * | 2007-03-27 | 2009-10-28 | 华为技术有限公司 | A kind of pre-distortion device and method |
| CN101330481B (en) * | 2007-06-19 | 2011-04-06 | 中兴通讯股份有限公司 | Predistortion model apparatus as well as apparatus, system and method for processing predistortion of signal |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8666336B1 (en) * | 2012-08-16 | 2014-03-04 | Xilinx, Inc. | Digital pre-distortion with model-based order estimation |
| CN108738122A (en) * | 2018-04-03 | 2018-11-02 | 京信通信***（中国）有限公司 | Digital pre-distortion power amplifying calibrating method, system and digital predistortion apparatus |
Non-Patent Citations (2)
| Title |
|---|
| Adaptive Digital Feedback Predistortion Technique for Linearizing Power Amplifiers;Young Yun Woo等;《IEEE Transactions on Microwave Theory and Techniques》;第55卷(第5期);932-940 * |
| 数字非线性预失真技术及其在数字音频广播发射中的应用;成都德芯数字科技有限公司;《广播与电视技术》;第42卷(第10期);148-149 * |
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