CN111835297A - Digital predistortion correction method, apparatus and storage medium - Google Patents
Digital predistortion correction method, apparatus and storage medium Download PDFInfo
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- CN111835297A CN111835297A CN202010688095.6A CN202010688095A CN111835297A CN 111835297 A CN111835297 A CN 111835297A CN 202010688095 A CN202010688095 A CN 202010688095A CN 111835297 A CN111835297 A CN 111835297A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3282—Acting on the phase and the amplitude of the input signal
Abstract
The application discloses a digital predistortion correction method, a digital predistortion correction device and a storage medium, which are beneficial to solving the problem that the output signal of a power amplifier in 5G millimeter wave system equipment is inaccurate. The method comprises the following steps: acquiring a predistortion coefficient corresponding to a target digital channel according to a corresponding relation between a prestored digital channel and the predistortion coefficient; and correcting the first digital signal according to the predistortion coefficient corresponding to the target digital channel to obtain a second digital signal.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a digital predistortion correction method, apparatus, and storage medium.
Background
In order to achieve high energy conversion efficiency, a power amplifier in a wireless transmitter needs to operate in a non-linear region, and when the power amplifier operates in a linear region, an input signal and an output signal of the power amplifier have a stable proportional relationship. When the power amplifier works in a nonlinear region, the input signal and the output signal of the power amplifier do not have a stable proportional relationship, and the output signal of the power amplifier has a distortion problem.
The 5G millimeter wave system equipment is a wireless transmitter, and the 5G millimeter wave system equipment mostly adopts a method that a power amplifier works to transmit signals in a linear region, so that the power consumption of the 5G millimeter wave system equipment is obviously increased. The 5G millimeter wave system equipment transmits signals by adopting a method that the power amplifier works in a nonlinear region to transmit signals, so that the power consumption can be reduced, but the problem that the output signals of the power amplifier are inaccurate is caused.
Disclosure of Invention
The application provides a digital predistortion correction method, a digital predistortion correction device and a storage medium, which are beneficial to solving the problem that the output signal of a power amplifier in 5G millimeter wave system equipment is inaccurate.
In a first aspect, a digital predistortion correction method is provided, which is applied to millimeter wave devices, and includes: acquiring a predistortion coefficient corresponding to a target digital channel according to a corresponding relation between a prestored digital channel and the predistortion coefficient; and correcting the first digital signal according to the predistortion coefficient corresponding to the target digital channel to obtain a second digital signal.
Therefore, the predistortion coefficient corresponding to the target digital channel is obtained according to the corresponding relation between the prestored digital channel and the predistortion coefficient, so that predistortion correction of the digital signal sent by the target digital channel is realized, and the problem that the output signal of the power amplifier in the 5G millimeter wave system equipment is inaccurate is solved.
In one possible implementation, the method further includes: and if the second digital signal meets the preset condition, sending the second digital signal.
In another possible implementation manner, if the second digital signal does not satisfy the preset condition, the target digital channel is closed; alternatively, the peak power of the transmitted second digital signal is adjusted. Therefore, when the preset condition is that the peak power of the transmitted target digital signal is smaller than or equal to the preset power threshold, the device such as the power amplifier and the like can be prevented from being burnt out due to overhigh peak power of the target digital signal.
In another possible implementation manner, the target digital channel and the corresponding relationship of the predistortion coefficients corresponding to the target digital channel are received and stored.
In a second aspect, a digital predistortion correction method is provided, which is applied to a digital predistortion correction apparatus, and includes: acquiring a plurality of analog signals; the plurality of analog signals are analog signals of a first beam direction generated by the millimeter wave device according to the third digital signal; carrying out down-conversion processing and digital processing on the plurality of analog signals to obtain a fourth digital signal; performing nonlinear parameter extraction according to the fourth digital signal and a third digital signal prestored by the digital predistortion correction equipment to obtain a first predistortion coefficient; the first predistortion coefficients are used to predistort the target digital signal before transmitting the target digital signal over the target digital channel.
Therefore, the target digital signal is subjected to predistortion processing according to the first predistortion coefficient, and the digital signal subjected to predistortion processing is sent through the target digital channel, so that predistortion correction of the target digital signal sent by the target digital channel is realized, the predistortion correction problem of the 5G millimeter wave system equipment is solved, and the additional increase of the power consumption of the 5G millimeter wave system equipment is avoided.
In a possible implementation manner, the "acquiring a plurality of analog signals" includes: opening a first receiving channel and receiving a plurality of analog signals in a first beam direction; the first receive channel is configured to receive a plurality of analog signals in a first beam direction.
In another possible implementation manner, the plurality of analog signals are generated by the millimeter wave device according to a digital signal obtained by pre-distorting the third digital signal.
In another possible implementation manner, the method further includes: and sending the corresponding relation between the first predistortion coefficient and the target digital channel to the millimeter wave equipment.
In a third aspect, there is provided a digital predistortion correction apparatus comprising: the device comprises an acquisition module, a data acquisition module and a digital predistortion coefficient calculation module; the acquisition module is used for acquiring a plurality of analog signals; the plurality of analog signals are analog signals of a first beam direction generated by the millimeter wave device according to the third digital signal; the data acquisition module is used for carrying out down-conversion processing and digital processing on the plurality of analog signals to obtain a fourth digital signal; the digital predistortion coefficient calculation module is used for carrying out nonlinear parameter extraction according to the fourth digital signal and a third digital signal prestored by the digital predistortion correction equipment to obtain a first predistortion coefficient; the first predistortion coefficients are used for performing predistortion processing on the target digital signal before the target digital signal is transmitted through the target digital channel.
Optionally, the digital predistortion correction apparatus further comprises: the channel switching selection module is used for starting a first receiving channel; the first receiving channel is used for receiving a plurality of analog signals in a first beam direction; the acquisition module is specifically configured to receive a plurality of analog signals in a first beam direction.
Optionally, the plurality of analog signals are generated by the millimeter wave device according to a digital signal obtained by pre-distorting the third digital signal.
Optionally, the digital predistortion correction apparatus further comprises: and the sending module is used for sending the corresponding relation between the first predistortion coefficient and the target digital channel to the millimeter wave equipment.
In a fourth aspect, there is provided a millimeter wave device comprising: the acquisition module is used for acquiring a predistortion coefficient corresponding to a target digital channel according to the corresponding relation between a prestored digital channel and the predistortion coefficient; and the generating module is used for correcting the first digital signal according to the predistortion coefficient corresponding to the target digital channel to obtain a second digital signal.
Optionally, the millimeter wave device further includes: and the sending module is used for sending the target digital signal if the target digital signal meets the preset condition.
Optionally, if the target digital signal does not satisfy the preset condition, the apparatus further includes an adjusting module, configured to close the target digital channel or adjust a peak power of the target digital signal.
Optionally, the obtaining module is further configured to receive and store a corresponding relationship between a target digital channel and a predistortion coefficient, which are sent by the digital predistortion correction device.
In a fifth aspect, the present application provides an electronic device comprising a memory and a processor. The memory is coupled to the processor. The memory is for storing computer program code comprising computer instructions. When executed by a processor, the computer instructions cause the electronic device to perform the method according to any of the possible implementations of the first aspect, or the method according to any of the possible implementations of the second aspect.
In a sixth aspect, the present application provides a chip system applied to an electronic device, the chip system including one or more interface circuits and one or more processors. The interface circuit and the processor are interconnected through a line; the interface circuit is configured to receive signals from a memory of the electronic device and to transmit the signals to the processor, the signals including computer instructions stored in the memory. When the processor executes the computer instructions, the electronic device performs the method according to any one of the possible implementations of the first aspect, or performs the method according to any one of the possible implementations of the second aspect.
In a seventh aspect, the present application provides a computer-readable storage medium comprising computer instructions that, when executed on an electronic device, cause the electronic device to perform the method according to any one of the possible implementations of the first aspect or perform the method according to any one of the possible implementations of the second aspect.
In an eighth aspect, the present application provides a computer program product comprising computer instructions that, when run on an electronic device, cause the electronic device to perform the method according to any one of the possible implementations of the first aspect, or to perform the method according to any one of the possible implementations of the second aspect.
It is understood that any one of the digital predistortion correction devices, millimeter wave devices, computer readable storage media, computer program products or chips provided above may be applied to the corresponding method provided above, and therefore, the beneficial effects achieved by the methods may refer to the beneficial effects in the corresponding methods, and are not described herein again.
These and other aspects of the present application will be more readily apparent from the following description.
Drawings
Fig. 1 is a schematic structural diagram of a technical solution provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a millimeter wave device to which the technical solution provided in the embodiment of the present application is applied;
fig. 3 is a schematic structural diagram of a digital predistortion correction apparatus according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a method for obtaining a corresponding relationship between a digital channel and a predistortion coefficient in a digital predistortion correction method according to an embodiment of the present application;
fig. 5 is a schematic flowchart of a digital predistortion correction method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a millimeter wave device according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a digital predistortion correction apparatus according to an embodiment of the present application.
Detailed Description
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the embodiments of the present application, "at least one" means one or more. "plurality" means two or more.
In the embodiment of the present application, "and/or" is only one kind of association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 1 is a schematic diagram of an architecture of a technical solution provided in an embodiment of the present application. Millimeter wave device 10 is connected to digital predistortion correction device 20 in fig. 1. The millimeter wave device 10 may be understood as a wireless transmitter for converting a digital signal into an analog signal and transmitting the analog signal. Digital predistortion correction device 20 is configured to receive an analog signal sent by millimeter wave device 10 and obtain a predistortion coefficient for millimeter wave device 10 from the received analog signal.
It will be appreciated that millimeter wave device 10 of fig. 1 may in practice be of the configuration shown in fig. 2. As shown in fig. 2, a schematic structural diagram of a millimeter wave device to which the technical solution provided in the embodiment of the present application is applied is shown. The millimeter wave device 10 includes a receiving unit 100, a memory 101, digital predistortion 102, a digital-to-analog converter 103, a phase converter 104, a power amplifier 105, and an antenna 106. The digital predistortion 102 is connected to the digital-to-analog converter 103 through a plurality of digital channels (e.g., digital channel 1 to digital channel n in fig. 2, where n is a positive integer greater than 1).
The receiving unit 100 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as Wide Area Networks (WAN), Local Area Networks (LAN), and the like.
The memory 101 may be used to store software programs and various data. The memory 101 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one functional unit, and the like. Further, the memory 101 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Alternatively, the memory 101 may be a non-transitory computer readable storage medium, for example, a read-only memory (ROM), a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
And the digital predistortion 102 is used for performing predistortion processing on a digital signal to be transmitted.
A digital-to-analog converter 103, also called D/a converter, DAC for short, is a device for converting a digital signal into an analog signal, the D/a converter comprising: the device comprises a weight resistor network, an operational amplifier, a reference power supply and an analog switch.
A phase converter 104 for modulating the phase of the transmitted signal.
The power amplifier 105, power amplifier (power amplifier), is referred to as "power amplifier", and is an amplifier capable of generating maximum power output to drive a load (e.g., a speaker) under a given distortion rate.
The antenna 106, which may be understood as a converter, converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in a borderless medium (usually free space) or vice versa. A component for transmitting or receiving electromagnetic waves in a radio device. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing, radio astronomy and the like all use electromagnetic waves to transmit information and work by depending on antennas. In addition, in transferring energy with electromagnetic waves, non-signal energy radiation also requires antennas.
It is understood that the digital channels in the millimeter wave device may include more digital channels than in fig. 2. In practical application, one digital channel corresponds to a plurality of analog channels. In FIG. 2, a digital channel is illustrated corresponding to m analog channels, where m is a positive integer greater than 1 (e.g., in FIG. 2, a digital channel 1 corresponds to an analog channel 1 to an analog channel m).
It should be noted that the millimeter wave device shown in fig. 2 is only an example, and does not limit the configuration of the millimeter wave device to which the embodiments of the present application are applicable. In actual implementation, the millimeter wave devices may include more or fewer devices or devices than shown in fig. 2.
The digital predistortion correction device 20 in fig. 1 may be the structure shown in fig. 3 in practice. Fig. 3 is a schematic structural diagram of a digital predistortion correction apparatus according to an embodiment of the present application. The digital predistortion correction apparatus 20 includes: signal receiving means 201, analog-to-digital converter 203, processor 204, transmitting unit 205 and memory 206.
The signal receiving means 201 is used for receiving the analog signal transmitted by the millimeter wave device 10, and the same device as the antenna 106 can be used.
It should be noted that one signal receiving apparatus corresponds to one receiving channel for receiving an analog signal in one beam direction. Fig. 3 illustrates only two receiving channels as an example. In practical implementation, the digital predistortion correction apparatus 20 may include more signal receiving devices 201.
Optionally, the digital predistortion correction apparatus 20 further comprises a channel switching selection device 202, which is implemented by hardware or software to receive analog signals of different beam directions, and one channel receives an analog signal of one beam direction.
The analog-to-digital converter 203, i.e. a/D converter, or ADC for short, generally refers to an electronic component for converting an analog signal into a digital signal. A typical analog-to-digital converter converts an input voltage signal into an output digital signal.
The processor 204 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs according to the present disclosure.
The transmission unit 205 is an interface to which an external device is connected with the digital predistortion correction apparatus 20. Such as a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, etc. The transmission unit 205 may be used to transmit data between the digital predistortion correction apparatus 20 and an external device.
The memory 206 may be the same device as the memory 101 described in fig. 2, and is not described in detail.
It should be noted that the digital predistortion correction apparatus shown in fig. 3 is merely an example, and the digital predistortion correction apparatus to which the embodiment of the present application is applicable shown in fig. 3 is not limited. In actual implementation, the digital predistortion correction device may include more or fewer devices or components than those shown in fig. 3.
The embodiment of the application can be applied to digital predistortion correction of millimeter wave equipment.
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. 4 is a schematic flowchart illustrating a method for obtaining a corresponding relationship between a digital channel and a predistortion coefficient in a digital predistortion correction method according to an embodiment of the present application, and is applied to the architecture shown in fig. 1.
Before the method is implemented, the same nonlinear behavior model and first digital signal (corresponding to the third digital signal in the claims) are preset in the memory 101 of the millimeter wave device 10 and the memory 206 in the digital predistortion correction device 20.
As shown in fig. 4, the method may include the steps of:
and S100, the millimeter wave device 10 opens the analog channel corresponding to the target digital channel and closes the analog channels corresponding to the other digital channels except the target digital channel. Wherein the target digital channel is any one of the digital channels in the millimeter wave device 10.
Specifically, in response to the operation instruction, millimeter wave device 10 may turn on an analog channel corresponding to the target digital channel in millimeter wave device 10, and turn off analog channels corresponding to other digital channels except for the target digital channel. In one possible implementation, the operation instruction may be triggered by a worker operating the millimeter wave device 10. In another possible implementation, the operation instruction may be an operation instruction sent by other apparatus received by millimeter wave device 10.
The millimeter wave device 10 transmits a plurality of analog signals in a first beam direction S101. The plurality of analog signals in the first beam direction are generated by performing up-conversion processing on a first digital signal sent by a target digital channel of the millimeter wave device.
S102: the digital predistortion correction device 20 receives the plurality of analog signals.
In one possible implementation, the digital predistortion correction device 20 includes a channel switching selection device, turns on the first receiving channel, and receives the plurality of analog signals in the first beam direction. Thus, when the digital predistortion correction device 20 needs to receive analog signals in different beam directions, it can be implemented by only selecting different receiving channels without adjusting the hardware settings of the receiving apparatus in the digital predistortion correction device 20.
In another possible implementation, the staff adjusts the receiving means in the digital predistortion correction device 20 to the first beam direction and receives the plurality of analog signals of the first beam direction.
The digital predistortion correction device 20 down-converts and digitizes the plurality of analog signals to obtain a second digital signal (corresponding to a fourth digital signal in the claims) S103.
S104: the digital predistortion correction device 20 performs nonlinear parameter extraction according to the pre-stored first digital signal and second digital signal to obtain a first predistortion coefficient. The first predistortion coefficient is used for carrying out predistortion processing on the target digital signal before the target digital signal is sent through the target digital channel.
It is to be understood that the first predistortion coefficient may include one or more parameters, and the number of the parameters included in the first predistortion coefficient is not limited in the embodiment of the present application.
S105: the digital predistortion correction device 20 transmits the correspondence relationship of the first predistortion coefficient and the target digital channel to the millimeter wave device 10. Wherein the target digital channel may be preset in the digital predistortion correction device 20 together with the first digital signal.
And S106, the millimeter wave device 10 stores the corresponding relation between the first predistortion coefficient and the target digital channel.
Subsequently, the millimeter wave device 10 may correct the digital signal to be transmitted using the correspondence relationship between the first predistortion coefficient and the target digital channel and then transmit the corrected digital signal.
It is understood that, in the embodiment of the present application, the process of extracting the first predistortion coefficient may be iterated multiple times, so that the obtained predistortion coefficient can more accurately correct the digital signal sent by the millimeter wave device.
In a possible implementation manner, the millimeter wave device 10 may obtain the final first predistortion coefficient corresponding to the target digital channel through the following steps:
step one, the millimeter wave device 10 obtains a first predistortion coefficient corresponding to the latest target digital channel.
Step two: the millimeter wave device 10 executes the step S100, and corrects the first digital signal according to the first predistortion coefficient corresponding to the target digital channel, so as to obtain a corrected digital signal.
Step three: the millimeter wave device 10 transmits a plurality of analog signals corresponding to the corrected digital signals.
Step four: the digital predistortion correction device 20 receives the plurality of analog signals, and performs down-conversion processing and digitization processing on the plurality of analog signals to obtain a new second digital signal.
Step five: the digital predistortion correction device 20 obtains the difference between the first digital signal and the new second digital signal, if the difference is smaller than the first threshold, the process is ended after the seventh step and the eighth step, if the difference is larger than or equal to the first threshold, the seventh step is executed after the sixth step, and the first step to the fifth step are executed again after the eighth step until the obtained difference is smaller than the first threshold.
Step six: the digital predistortion correction device 20 performs nonlinear parameter extraction based on the new first digital signal and the new second digital signal to obtain a new first predistortion coefficient.
Step seven: the digital predistortion correction device 20 transmits the correspondence relationship of the new first predistortion coefficient and the target digital channel to the millimeter wave device 10.
Step eight: the millimeter wave device 10 stores the correspondence relationship between the new first predistortion coefficient and the target digital channel.
Therefore, the first predistortion coefficient corresponding to the target digital channel is obtained, predistortion correction of the digital signal sent by the millimeter wave device is realized, and the problem that the output signal of the power amplifier corresponding to the target digital channel in the 5G millimeter wave system device is inaccurate is solved. In addition, in the embodiment of the present application, the millimeter wave device 10 and the digital predistortion correction device 20 implement hardware decoupling, and when performing predistortion coefficient extraction, the method is not limited by the limitation of the operation resource of the millimeter wave device, and can implement predistortion coefficient extraction by using a more efficient algorithm.
Fig. 5 is a schematic flowchart illustrating a digital predistortion correction method provided in an embodiment of the present application, and is applied to a millimeter wave device. As shown in fig. 5, the method may include the steps of:
s200: and the millimeter wave equipment acquires the predistortion coefficient corresponding to the target digital channel according to the corresponding relation between the pre-stored digital channel and the predistortion coefficient.
S201: the millimeter wave device corrects the third digital signal (corresponding to the first digital signal in the claims) according to the predistortion coefficient corresponding to the target digital channel, and obtains a fourth digital signal (corresponding to the second digital signal in the claims).
S202: and the millimeter wave device judges whether the fourth digital signal meets a preset condition. If so, go to step S203, otherwise, go to step S204.
In one possible implementation, the preset condition may be that the peak power of the fourth digital signal is less than or equal to a power threshold.
S203: and the millimeter wave equipment closes the target digital channel, or adjusts the fourth digital signal and sends the adjusted fourth digital signal, and the peak power of the adjusted fourth digital signal is less than or equal to the power threshold.
Therefore, the millimeter wave equipment can not cause damage to devices such as a power amplifier and the like because the peak power of the corrected digital signal is too high.
S204: the millimeter wave device transmits the fourth digital signal.
Specifically, the millimeter wave device sends the fourth digital signal to a digital-to-analog converter in the millimeter wave device through the target digital channel, and the digital-to-analog converter converts the fourth digital signal into a corresponding analog signal, and sends the processed analog signals after processing by the phase converter, the power amplifier, and the like.
In the embodiment of the application, the millimeter wave device performs predistortion correction on the digital signal sent by the millimeter wave device according to the pre-stored corresponding relationship between the digital channel and the predistortion coefficient, which is helpful for solving the problem that the output signal of the power amplifier in the 5G millimeter wave system device is inaccurate, and cannot cause additional increase of the power consumption of the 5G millimeter wave system device.
The scheme provided by the embodiment of the application is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the exemplary method steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, functional modules of the millimeter wave device 10 may be divided according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
Fig. 6 is a schematic structural diagram of a millimeter wave device according to an embodiment of the present disclosure. The millimeter wave device 60 may be used to perform the functions performed by the millimeter wave device in any of the embodiments described above (e.g., the embodiments shown in fig. 4 or 5). The millimeter wave device 60 includes: an acquisition module 601 and a generation module 602. Wherein, the obtaining module 601: and the predistortion processing module is used for acquiring a predistortion coefficient corresponding to the target digital channel according to the corresponding relation between the prestored digital channel and the predistortion coefficient. The generation module 602: and the predistortion processing unit is used for correcting the first digital signal according to the predistortion coefficient corresponding to the target digital channel to obtain a second digital signal. For example, in conjunction with fig. 4, the obtaining module 601 may be configured to perform the receiving step in S105. With reference to fig. 5, the obtaining module 601 may be configured to perform S200, and the generating module 602 may be configured to perform S201.
Optionally, the millimeter wave device 60 further includes: a sending module 603, configured to send the target digital signal if the target digital signal meets a preset condition.
Optionally, if the target digital signal does not satisfy the preset condition, the millimeter wave device 60 further includes an adjusting module 604, configured to close the target digital channel or adjust the peak power of the target digital signal.
Optionally, the obtaining module 601 is further configured to receive and store a corresponding relationship between a target digital channel and a predistortion coefficient, which are sent by the digital predistortion correction device.
In one example, referring to fig. 2, the receiving function of the obtaining module 601 may be implemented by the receiving unit 100 in fig. 2. The generating module 602 can be implemented by invoking a computer program stored in the memory 101 by the digital predistortion 102 in fig. 2 and the corresponding relationship between the predistortion coefficients and the target digital channel.
For the detailed description of the above alternative modes, reference is made to the foregoing method embodiments, which are not described herein again. In addition, for the explanation and the description of the beneficial effects of any millimeter wave device 60 provided above, reference may be made to the corresponding method embodiment described above, and details are not repeated.
It should be noted that the actions correspondingly performed by the modules are merely specific examples, and the actions actually performed by the units refer to the actions or steps mentioned in the description of the embodiments based on fig. 4 and fig. 5.
In the embodiment of the present application, the digital predistortion correction device 20 may be divided into functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
Fig. 7 is a schematic structural diagram of a digital predistortion correction apparatus according to an embodiment of the present application. The digital predistortion correction device 70 may be used to perform the functions performed by the digital predistortion correction device in any of the embodiments described above (e.g., the embodiment shown in fig. 4). The digital predistortion correction apparatus 70 includes: the device comprises an acquisition module 701, a data acquisition module 702 and a digital predistortion coefficient calculation module 703. Wherein, the obtaining module 701: for acquiring a plurality of analog signals; the plurality of analog signals are analog signals of the first beam direction generated by the millimeter wave device from the third digital signal. The data acquisition module 702 is configured to perform down-conversion processing and digital processing on the multiple analog signals to obtain a fourth digital signal. A digital predistortion coefficient calculation module 703, configured to perform nonlinear parameter extraction according to the fourth digital signal and a third digital signal pre-stored in the digital predistortion correction device, so as to obtain a first predistortion coefficient; the first predistortion coefficients are used for performing predistortion processing on the target digital signal before the target digital signal is transmitted through the target digital channel. For example, in conjunction with fig. 4, the obtaining module 701 may be configured to perform S102, the data acquisition module 702 may be configured to perform S103, and the digital predistortion coefficient calculation module 703 may be configured to perform S104.
Optionally, the digital predistortion correction device 70 further comprises: a sending module 704, configured to send the corresponding relationship between the first predistortion coefficient and the target digital channel to the millimeter wave device.
Optionally, the digital predistortion correction device 70 further comprises: a channel switching selection module 705, configured to open a first receiving channel; the first receive channel is configured to receive a plurality of analog signals in a first beam direction. The obtaining module 701 is specifically configured to receive a plurality of analog signals in a first beam direction.
Optionally, the plurality of analog signals are generated by the millimeter wave device according to the digital signal after the third digital signal is subjected to the predistortion processing.
In one example, referring to fig. 3, the receiving function of the above-mentioned obtaining module 701 can be implemented by the antenna 201 in fig. 3. The function of the data acquisition module 702 can be implemented by the analog-to-digital converter 203 in fig. 3. The functions of the digital predistortion coefficient calculation module 703 described above may be implemented by the processor 204 calling a computer program in the memory 206.
For the detailed description of the above alternative modes, reference is made to the foregoing method embodiments, which are not described herein again. In addition, for the explanation and the description of the beneficial effects of any of the digital predistortion correction devices 70 provided above, reference may be made to the corresponding method embodiments described above, and details are not repeated.
It should be noted that the actions performed by the modules are only specific examples, and the actions actually performed by the units refer to the actions or steps mentioned in the description of the embodiment based on fig. 4.
An embodiment of the present application further provides an electronic device, including: a memory and a processor; the memory is for storing a computer program, and the processor is for invoking the computer program to perform the actions or steps mentioned in any of the embodiments provided above.
Embodiments of the present application also provide a computer-readable storage medium, which stores a computer program, and when the computer program runs on a computer, the computer program causes the computer to execute the actions or steps mentioned in any of the embodiments provided above.
The embodiment of the application also provides a chip. The chip integrates a circuit and one or more interfaces for realizing the functions of the millimeter wave device or the digital predistortion correction device. Optionally, the functions supported by the chip may include processing actions in the embodiments described based on fig. 4 or fig. 5, which are not described herein again. Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be implemented by a program instructing the associated hardware to perform the steps. The program may be stored in a computer-readable storage medium. The above-mentioned storage medium may be a read-only memory, a random access memory, or the like. The processing unit or processor may be a central processing unit, a general purpose processor, an Application Specific Integrated Circuit (ASIC), a microprocessor (DSP), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.
The embodiments of the present application also provide a computer program product containing instructions, which when executed on a computer, cause the computer to execute any one of the methods in the above embodiments. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It should be noted that the above devices for storing computer instructions or computer programs provided in the embodiments of the present application, such as, but not limited to, the above memories, computer readable storage media, communication chips, and the like, are all nonvolatile (non-volatile).
Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Although the present application has been described in conjunction with specific features and embodiments thereof, various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application.
Claims (18)
1. A digital predistortion correction method applied to a millimeter wave device, the method comprising:
acquiring a predistortion coefficient corresponding to a target digital channel according to a corresponding relation between a prestored digital channel and the predistortion coefficient;
and correcting the first digital signal according to the predistortion coefficient corresponding to the target digital channel to obtain a second digital signal.
2. The method of claim 1, further comprising:
and if the second digital signal meets a preset condition, sending the second digital signal.
3. The method of claim 1 or 2, wherein if the second digital signal does not satisfy a preset condition, the target digital channel is closed; alternatively, the peak power at which the second digital signal is transmitted is adjusted.
4. The method according to claim 1 or 2, characterized in that the method further comprises:
and receiving and storing the corresponding relation between the target digital channel and the predistortion coefficient corresponding to the target digital channel.
5. A digital predistortion correction method applied to a digital predistortion correction apparatus, the method comprising:
acquiring a plurality of analog signals; the plurality of analog signals are analog signals of a first beam direction generated by the millimeter wave device according to the third digital signal;
performing down-conversion processing and digital processing on the plurality of analog signals to obtain a fourth digital signal;
performing nonlinear parameter extraction according to the fourth digital signal and the third digital signal prestored in the digital predistortion correction device to obtain a first predistortion coefficient; the first predistortion coefficients are used for performing predistortion processing on a target digital signal before the target digital signal is sent through a target digital channel.
6. The method of claim 5, wherein said obtaining a plurality of analog signals comprises:
opening a first receiving channel and receiving a plurality of analog signals in a first beam direction; the first receive channel is configured to receive a plurality of analog signals in a first beam direction.
7. The method of claim 5, wherein the plurality of analog signals are generated by the millimeter wave device from a digital signal that is pre-distorted from the third digital signal.
8. The method according to any one of claims 5-7, further comprising:
and sending the corresponding relation between the first predistortion coefficient and the target digital channel to the millimeter wave equipment.
9. A digital predistortion correction device, characterized in that the digital predistortion correction device comprises: the device comprises an acquisition module, a data acquisition module and a digital predistortion coefficient calculation module;
the acquisition module is used for acquiring a plurality of analog signals; the plurality of analog signals are analog signals of a first beam direction generated by the millimeter wave device according to the third digital signal;
the data acquisition module is used for performing down-conversion processing and digital processing on the plurality of analog signals to obtain a fourth digital signal;
the digital predistortion coefficient calculation module is used for performing nonlinear parameter extraction according to the fourth digital signal and the third digital signal prestored in the digital predistortion correction device to obtain a first predistortion coefficient; the first predistortion coefficients are used for performing predistortion processing on a target digital signal before the target digital signal is sent through a target digital channel.
10. The digital predistortion correction device according to claim 9, characterized by further comprising:
the channel switching selection module is used for starting a first receiving channel; the first receiving channel is used for receiving a plurality of analog signals in a first beam direction;
the obtaining module is specifically configured to receive a plurality of analog signals in a first beam direction.
11. The digital predistortion correction device according to claim 9, wherein the plurality of analog signals are generated by the millimeter wave device from a digital signal after the third digital signal has been subjected to the predistortion processing.
12. The digital predistortion correction device according to any one of claims 9 to 11, characterized by further comprising:
and the sending module is used for sending the corresponding relation between the first predistortion coefficient and the target digital channel to the millimeter wave equipment.
13. A millimeter-wave device, characterized in that the device comprises:
the acquisition module is used for acquiring a predistortion coefficient corresponding to a target digital channel according to the corresponding relation between a prestored digital channel and the predistortion coefficient;
and the generating module is used for correcting the first digital signal according to the predistortion coefficient corresponding to the target digital channel to obtain a second digital signal.
14. The apparatus of claim 13, further comprising:
and the sending module is used for sending the target digital signal if the target digital signal meets the preset condition.
15. The apparatus of claim 13, further comprising an adjustment module for shutting down the target digital channel or adjusting a peak power of the target digital signal if the target digital signal does not satisfy a predetermined condition.
16. The device according to any one of claims 13 to 15, wherein the obtaining module is further configured to receive and store a corresponding relationship between a target digital channel and a predistortion coefficient, which is sent by the digital predistortion correction device.
17. An electronic device, comprising: a memory for storing a computer program and a processor for executing the computer program to perform the method of any of claims 1-4 or to perform the method of any of claims 5-8.
18. A computer-readable storage medium, having stored thereon a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1-4, or to perform the method of any of claims 5-8.
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