WO2022188681A1 - Non-linear calibration method and device for pa - Google Patents

Abstract

Disclosed in embodiments of the present application are a non-linear calibration method and device for a PA. The method comprises: a terminal receiving configuration information, the configuration information being used to configure a first resource; and performing non-linear calibration on a first PA of the terminal by means of the first resource.

Description

PA nonlinear calibration method and equipment

cross reference

The present invention claims the priority of the Chinese patent application filed on March 8, 2021, with the application number 202110252413.9, and the invention title is "Nonlinear Calibration Method and Apparatus for PA", the entire contents of which are incorporated by reference in in the present invention.

technical field

The present application belongs to the field of communication technologies, and in particular relates to a nonlinear calibration method and device for a power amplifier (Power Amplifier, PA).

Background technique

PA is an important part of communication wireless transmitter. In the front-end circuit of the transmitter, the power of the RF signal generated by the modulation oscillator circuit is small, and it needs to go through a series of amplification—buffer stage, intermediate amplification stage, and final power amplifier. After obtaining enough RF power, it can be fed to The antenna is radiated out to complete the communication function. Therefore, the performance of the PA directly affects the communication quality.

The output of an ideal PA has a linear relationship with the input, that is, output = input * magnification. However, such an ideal linear PA does not exist, in fact all PAs are nonlinear. In order to combat the nonlinear characteristics of the PA, the terminal can perform digital pre-distortion (Digital Pre-Distortion, DPD) processing before the signal enters the PA to compensate for the signal distortion caused by the nonlinear characteristics of the PA, and achieve the purpose of linear amplification.

But the nonlinear characteristics of PA are not fixed, it will be affected by factors such as time, temperature, environment, previous input and so on. For example, the nonlinear characteristic of the PA varies with the temperature; another example, with the change of time, the nonlinear characteristic of the PA will also change after a period of use. In related communication technologies, the digital predistortion technology is usually implemented by the manufacturers themselves. It is done in advance before the terminal leaves the factory. It is impossible to calibrate the nonlinear characteristics of the PA during the use of the terminal, which easily causes signal distortion and affects the performance of the communication system.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a nonlinear calibration method and device for a PA, which can solve the problem in the related art that the nonlinear characteristics of the PA cannot be calibrated, which easily causes signal distortion and affects the performance of the communication system.

A first aspect provides a nonlinear calibration method for a PA, the method comprising: a terminal receiving configuration information, where the configuration information is used to configure a first resource; and performing nonlinear calibration on the first PA by using the first resource .

In a second aspect, a nonlinear calibration method for a PA is provided. The method includes: a network-side device sends configuration information, where the configuration information is used to configure a first resource, and the first resource is used by the terminal to align the first PA Perform nonlinear calibration.

In a third aspect, a non-linear calibration device for PA is provided, including: a receiving module, configured to receive configuration information, where the configuration information is used to configure a first resource; a calibration module, configured to use the first resource to align the first resource A PA performs nonlinear calibration.

In a fourth aspect, a non-linear calibration device for a PA is provided, including: a sending module configured to send configuration information, where the configuration information is used to configure a first resource, and the first resource is used by a terminal to perform a calibration on the first PA. Nonlinear calibration.

In a fifth aspect, a terminal is provided, the terminal includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, when the program or instruction is executed by the processor A method as described in the first aspect is implemented.

In a sixth aspect, a network side device is provided, the network side device includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being executed by the The processor implements the method as described in the second aspect when executed.

In a seventh aspect, a readable storage medium is provided, on which a program or an instruction is stored, and when the program or instruction is executed by a processor, the method described in the first aspect or the second the method described in the aspect.

In an eighth aspect, a computer program product is provided, the computer program product comprising a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being executed by the When executed by the processor, the method described in the first aspect or the method described in the second aspect is realized.

In a ninth aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement the method according to the first aspect , or implement the method described in the second aspect.

In the embodiment of the present application, the network-side device configures the terminal with the first resource, and the terminal performs nonlinear calibration on the first PA through the first resource, so that the output and input of the first PA satisfy a linear relationship as much as possible, and avoid nonlinear characteristics of the PA The resulting signal distortion improves the performance of the communication system.

Description of drawings

1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

FIG. 2 is a schematic flowchart of a nonlinear calibration method of a PA according to an embodiment of the present application;

3 is a schematic flowchart of a nonlinear calibration method for a PA according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a nonlinear calibration apparatus for a PA according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a nonlinear calibration apparatus for a PA according to an embodiment of the present application;

6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a network side device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of this application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first", "second" distinguishes Usually it is a class, and the number of objects is not limited. For example, the first object may be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

It is worth noting that the technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and uses NR terminology in most of the following description, these techniques can also be applied to applications other than NR system applications, such as the 6th Generation (6th ^Generation , 6G) Communication system.

FIG. 1 shows a schematic diagram of a wireless communication system to which an embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12 . The terminal 11 may also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a mobile phone, a tablet computer (Tablet Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), PDA, netbook, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet Device (Mobile Internet Device, MID), wearable device (Wearable Device) or vehicle-mounted device ( VUE), pedestrian terminal (PUE) and other terminal-side devices, wearable devices include: bracelets, earphones, glasses, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 . The network side device 12 may be a base station or a core network, wherein the base station may be referred to as a Node B, an evolved Node B, an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a basic service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Node B, Evolved Node B (eNB), Next Generation Node B (gNB), Home Node B, Home Evolved Node B, WLAN Access point, WiFi node, or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. The base station is taken as an example, but the specific type of the base station is not limited.

The nonlinear calibration method and device for a power amplifier (Power Amplifier, PA) provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

As shown in FIG. 2 , an embodiment of the present application provides a non-linear calibration method 200 for a PA. The method can be executed by a terminal. In other words, the method can be executed by software or hardware installed in the terminal. The method includes the following steps.

S202: The terminal receives configuration information, where the configuration information is used to configure the first resource.

In this embodiment, the first resource may be used by the terminal to perform nonlinear calibration on the first PA, and the first PA may be located in the radio frequency link of the terminal.

Optionally, the first resource may include at least one of the following: time domain resources, frequency domain resources, resource elements (Resource Element, RE), time delay domain resources, Doppler domain resources, and code domain resources.

In one example, the first resource includes time domain resources, and the first resource may include one of the following: K slots, K half slots, K symbols (OFDM symbols), K subframes, K radio frames, K milliseconds, K seconds, K minutes, K other common time units, etc. It can be understood that K is a positive integer, and the value of K may vary for the above different time units. For example, the first resource includes 3 time slots; for another example, the first resource includes 4 symbols and so on.

S204: Perform nonlinear calibration on the first PA by using the first resource.

Optionally, when the first resource is a time domain resource, the terminal may perform nonlinear calibration on the first PA of the terminal within the first resource. In this case, the first resource may be a time domain resource configured by the network side device and used by the terminal to perform nonlinear calibration on the first PA.

The nonlinear calibration of the first PA by using the first resource mentioned in this embodiment may be that the nonlinear characteristics of the first PA are acquired through the first resource, and then the nonlinear characteristics of the first PA may be acquired according to the acquired nonlinear characteristics. Perform nonlinear calibration so that the output of the first PA and the input satisfy the linear relationship as much as possible, that is, output=input*amplification.

The nonlinear calibration of the first PA by using the first resource mentioned in this embodiment may also be updating the first distortion processing module by using the first resource, where the first distortion processing module is used to Signal distortion caused by nonlinear characteristics is compensated. Through the above calibration process, the final goal may be to make the output of the first PA and the input satisfy the linear relationship as much as possible, that is, output=input*amplification. This example does not limit the process of acquiring the nonlinear feature of the first PA, for example, it may be acquired through the first resource, or may be acquired through other ways.

Optionally, after performing nonlinear calibration on the first PA through the first resource in S204, the terminal may also transmit channels or signals through the calibrated first PA, because the output and input of the calibrated first PA can meet the requirements as far as possible. The linear relationship can avoid the signal distortion caused by the nonlinear characteristics of the PA and improve the performance of the communication system.

In the nonlinear calibration method of the PA provided by the embodiment of the present application, the network-side device configures the first resource for the terminal, and the terminal performs nonlinear calibration on the first PA through the first resource, so that the output and the input of the first PA satisfy a linear relationship as much as possible, Avoid the signal distortion caused by the nonlinear characteristics of the PA, and improve the performance of the communication system.

Optionally, the nonlinear calibration of the first PA by using the first resource mentioned in the embodiment may include at least one of the following 1) and 2).

1) Send a scan signal through the first resource, and acquire nonlinear characteristics of the first PA according to the sent scan signal.

In this example, the terminal may send scanning signals of different gears in the first resource, so that the terminal can acquire the nonlinear characteristics of the first PA. The nonlinear feature can be used to perform nonlinear calibration on the first PA, so that the output and the input of the first PA satisfy a linear relationship as much as possible.

The scanning signals of different gears mentioned in this example include, for example: scanning signals of different powers, different types of scanning signals, scanning signals of different time domain positions, scanning signals of different frequency domain positions, scanning signals of different phases, Scanning signals sent with different bandwidths, etc.

In this example, the nonlinear characteristics of the first PA can be represented by at least one of the following: a relationship curve between normalized input power and output power; a relationship curve between normalized input power and the phase of the actual output signal ; the relationship curve between the normalized input power and the amplitude of the actual output signal; the relationship curve between the normalized input power and the time delay of the actual output signal; the relationship between the normalized input power and the actual output signal Dopp The relationship curve of the frequency shift; and so on.

Optionally, the correlation between the scanning signal sent in this embodiment and the first target channel or signal satisfies a preset correlation condition, or the orthogonality between the scanning signal and the first target channel or signal is good, such as orthogonality. above a certain orthogonality condition. In this embodiment, the interference caused by the scanning signal to the first target channel or signal can be reduced as much as possible.

In an example, the above-mentioned scanning signal adopts a specific sequence, and the orthogonality with the first target channel or signal is higher than the preset orthogonality condition.

The first target channel mentioned in this example includes, for example: Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) ), physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), etc.; the first target signal includes, for example: sounding reference signal (Sounding Reference Signal, SRS), synchronization signal and physical broadcast block (Synchronization Signal and PBCH Block, SSB), Channel State Information-Reference Signal (CSI-RS), Tracking Reference Signal (TRS), Phase Tracking Reference Signal (PTRS), etc.

2) Update the first distortion processing module by using the first resource, where the first distortion processing module is used to compensate the signal distortion caused by the nonlinear characteristics of the first PA.

In this example, the first distortion processing module may be connected to the input end of the first PA, and the first distortion processing module may perform digital pre-distortion (Digital Pre-Distortion, DPD) and other advanced processing before the signal enters the first PA, so that the first The output and input of a PA should satisfy a linear relationship as far as possible. In this example, the first distortion processing module is a nonlinear unit, which may also be called a predistorter.

In this example, the first distortion processing module may also be connected to the output end of the first PA, and may perform distortion processing on the signal output by the first PA, so that the output and the input of the first PA satisfy a linear relationship as much as possible.

The updating of the first distortion processing module through the first resource mentioned in this example may be to update the first distortion processing module according to the nonlinear characteristics of the first PA obtained in 1), or to update the first distortion processing module according to other parameters. A distortion processing module, the ultimate purpose may be to make the output of the first PA and the input satisfy the linear relationship as much as possible.

In this example, by updating the first distortion processing module with the first resource, the performance of the first distortion processing module can be improved.

Optionally, the first distortion processing module is implemented based on an artificial intelligence model, and updating the first distortion processing module through the first resource mentioned in the above 2) includes: updating the first distortion processing module through the first resource as follows: At least one of: model parameters, algorithm, quantization level, structure.

As mentioned above, updating the quantization level of the first distortion processing module, for example, updating the quantization level of at least one neuron of the first distortion processing module.

The above mentioned structure of updating the first distortion processing module, for example, updating the number of layers of the first distortion processing module, the number of neurons, and the number of neurons in a certain layer (eg, input layer, output layer, intermediate layer, etc.).

The above-mentioned model parameters may include multiplicative coefficients (weights), additive coefficients (biases), and the like of neurons in the artificial intelligence model.

In one example, the first distortion processing module includes a fully connected network, and the model parameters include at least one of the following 1) to 2): 1) a multiplicative weighting coefficient of neurons, 2) an additive value of neurons Weighting factor.

In one example, the first distortion processing module includes a recurrent neural network/recurrent neural network (Recurrent Neural Network, RNN), and the model parameters include at least one of the following: a weighting coefficient (bias) of a recurrent unit, a recurrent unit The multiplicative weighting coefficient of (including state-state weight, state-input weight), the additive weighting coefficient of the cyclic unit. The recurrent unit mentioned in this example can be a special neuron, and the input of the neuron includes not only the current input, but also the last input, the last intermediate information, and so on.

In one example, the first distortion processing module includes a convolutional neural network (Convolutional Neural Network, CNN), and the model parameters include at least one of the following 1) to 3): 1) the weight coefficient of the convolution kernel, 2) The amount of bias of the convolution kernel, 3) The pooling algorithm of the pooling layer.

In each of the above examples, the terminal may not perform uplink transmission through the first resource, so as to avoid interference caused by the nonlinear calibration process to the uplink transmission, and improve the performance of the communication system.

In other examples, the terminal may also perform uplink transmission through the first resource. In this example, the following four ways can be used to avoid the interference caused by the nonlinear calibration process to the uplink transmission.

Approach 1: In the first resource, the nonlinear calibration is not performed on the first PA at the time of the uplink transmission, that is, the nonlinear calibration and the uplink transmission will not be performed at the same time to avoid mutual interference.

Approach 2: In the first resource, the uplink transmission uses a second distortion processing module, and the second distortion processing module is different from the first distortion processing module corresponding to the nonlinear calibration.

In this example, the first distortion processing module may be updated through the first resource, and both the first distortion processing module and the second distortion processing module may be used to perform signal distortion processing on the signal distortion caused by the nonlinear characteristics of the first PA. compensate.

Optionally, the first distortion processing module is implemented based on an artificial intelligence model, and the second distortion processing module is not implemented based on an artificial intelligence model to save costs. In this example, the second distortion processing module may be referred to as a backup distortion processing module, the second distortion processing module is temporarily used when performing nonlinear calibration on the first distortion processing module, and the first distortion processing module can be used at other times The signal distortion caused by the nonlinear characteristics of the first PA is compensated.

Approach 3: Uplink transmission uses a second PA, where the second PA is different from the first PA.

Approach 4: In the first resource, the uplink transmission does not use the first distortion processing module corresponding to the nonlinear calibration.

In this example, the uplink transmission signal may no longer be input to the first distortion processing module, that is, the pre-distortion processing is no longer performed, and is directly input to the first PA for amplification processing. Wherein, the nonlinear calibration of the first PA by using the first resource mentioned in Embodiment 200 may specifically be to update the first distortion processing module by using the first resource, and the first distortion processing module is used for the nonlinear characteristics of the first PA. The resulting signal distortion is compensated.

Optionally, the second PA mentioned in the above approach 3 satisfies at least one of the following 1) to 3).

1) The second PA is connected to a third distortion processing module, and the third distortion processing module is configured to compensate for signal distortion caused by nonlinear characteristics of the second PA.

2) The signal input to the second PA is subjected to pre-distortion processing, so that the output of the second PA and the input satisfy a linear relationship as much as possible.

3) The signal output by the second PA is subjected to distortion compensation processing, so that the output of the second PA (the signal after the distortion compensation processing) and the input satisfy a linear relationship as much as possible.

Optionally, in each of the foregoing embodiments for performing uplink transmission, since uplink transmission is performed in the first resource and nonlinear calibration processing is performed on the first PA, therefore, the uplink transmission performed in the first resource The index requirement can be lower than the preset index threshold, so as to reduce the requirement on the transmission performance and reduce the cost requirement of the terminal.

For example, the uplink transmit power is reduced and is lower than a certain power threshold; or the requirements for Error Vector Magnitude (EVM) are reduced, which is lower than a certain EVM threshold; or the requirements for other signal indicators are reduced.

Optionally, in each of the foregoing embodiments for performing uplink transmission, within the first resource, the transmission power of the terminal satisfies at least one of the following 1) to 2): 1) The instantaneous power is lower than the first threshold ; 2) The average power is lower than the second threshold.

The transmission power mentioned above, such as instantaneous power and average power, may include one of the following: Total Radiated Power (TRP), Effective Isotropic Radiated Power (EIRP), each resource unit energy (Energy Per Resource Element, EPRE). For example, in the low frequency band (FR1), TRP is used; in the high frequency band (FR2, FR3 and above), the EIRP is used.

The first threshold and/or the second threshold mentioned in the foregoing embodiment includes one of the following: a maximum allowable radiation dose (Maximum Permissible Exposure, MPE), a human body safe radiation power.

In an example, the first threshold and/or the second threshold includes the human body safe radiation power, and the method further includes: detecting the distance between the terminal and the human body; after detecting the distance between the terminal and the human body The human body safe radiation power is used when the distance is less than the preset distance.

In this example, the terminal may also detect parts of the human body, and for different parts of the human body, the preset distance requirements and/or the thresholds for the safe radiation power of the human body may be different. For example, for the brain and the hand, the preset distance requirement allowed by the brain is greater than the preset distance requirement allowed by the hand (in the case of less than the above preset distance requirement, non-linear calibration may not be performed); and/ Or; the human body safe radiation power threshold allowed by the brain is less than the human body safe radiation power threshold allowed by the hand.

Optionally, each of the foregoing embodiments may further include the following steps: within the conflicting resources, do not perform uplink transmission or allow transmission of the second target channel or signal; wherein the conflicting resources include the second resource and/or the first Three resources, the second resource is a resource located before the first resource, and the third resource is a resource located after the first resource.

Optionally, the resource amount of the third resource is greater than the resource amount of the second resource. In this embodiment, the first resource, the second resource and the third resource may all be time domain resources. In this embodiment, it is considered that after the nonlinear calibration of the first PA is performed by the first resource, the terminal may need a certain recovery period (for example, updating the model parameters, algorithm, quantization level, structure, etc. of the first distortion processing module requires a certain period of time). time) can perform uplink transmission normally, so a third resource is set to avoid transmission problems caused by the terminal during the recovery period as much as possible, and improve the performance of the communication system.

Optionally, the second resource, the third resource and the first resource are the same unit. For example, the first resource is N time slots or symbols, the second resource is N1 symbols, the third resource is N2 symbols, and N, N1 and N2 are all positive integers.

The above-mentioned not performing uplink transmission may be the transmission that does not allow at least one of the following: PUCCH, PUSCH, SRS, Physical Random Access Channel (Physical Random Access Channel, PRACH), the SRS mentioned here may include periodic SRS, Semi-persistent SRS and aperiodic SRS.

The aforementioned transmission of the second target channel or signal is permitted, which may be at least one of the following transmissions: PUCCH, PRACH, and aperiodic SRS transmission. That is, PUCCH, PRACH, and aperiodic SRS have higher priorities, allowing transmission of high-priority channels or signals.

Optionally, the terminal includes at least two sets of radio frequency links, the first PA is located in the first radio frequency chain, and the method further includes: performing uplink transmission through a second radio frequency link, the first radio frequency chain The path is different from the second radio frequency link.

In this embodiment, when the terminal has at least two sets of radio frequency links, when one set of radio frequency links performs nonlinear calibration of the PA, the other set of radio frequency links can perform uplink transmission. The terminal may be dual connected (Dual connectivity, DC), or satisfy the dual active protocol stack (Dual Active Protocol Stack, DAPS).

Optionally, the nonlinear calibration performed on the first PA in each of the foregoing embodiments may be: periodic, semi-persistent, aperiodic, or event-triggered.

In an example, the nonlinear calibration of the first PA is performed periodically. For example, parameters such as a radio resource control (Radio Resource Control, RRC) configuration period and the first resource, the terminal periodically performs nonlinear calibration on the first PA. .

In one example, the nonlinear calibration of the first PA is semi-persistent, for example, parameters such as the RRC configuration period, the first resource, and the activation/deactivation of a Media Access Control-Control Element (MAC CE) The activation terminal performs nonlinear calibration on the first PA.

In an example, the nonlinear calibration of the first PA is aperiodic. For example, parameters such as the RRC configuration period and the first resource, and downlink control information (Downlink Control Information, DCI) trigger the terminal to perform nonlinear calibration on the first PA.

In an example, performing nonlinear calibration on the first PA is event-triggered. For example, the network-side device configures relevant parameters in advance, and performs nonlinear calibration on the first PA when an event trigger is detected.

Optionally, the event triggering includes at least one of the following 1) to 4).

1) The variation of the nonlinear characteristic of the first PA exceeds a preset linear threshold.

2) The indicator of the signal sent by the first PA is lower than the preset indicator threshold, for example, the signal indicator such as EVM of the transmitted signal is lower than the preset indicator threshold.

3) The working duration of the first PA exceeds a preset duration threshold; the working duration may include a certain working duration or a total working duration.

4) The variation of the parameters of the environment in which the first PA is located exceeds a preset environmental parameter threshold, for example, the temperature variation within a period of time exceeds the temperature threshold.

Optionally, each of the foregoing embodiments may further include the following steps: when the terminal is in a target state, non-linear calibration is performed on the first PA without using the first resource, so as to reduce power consumption in the target state; Wherein, the target state includes one of the following 1) to 3): 1) idle state (idle), 2) inactive state (inactive), 3) non-connected state, the non-connected state may include idle state and inactive state active state.

The nonlinear calibration method of the PA according to the embodiment of the present application is described in detail above with reference to FIG. 2 . The nonlinear calibration method of the PA according to another embodiment of the present application will be described in detail below with reference to FIG. 3 . It can be understood that the interaction between the network side device and the terminal described from the network side device is the same as the description on the terminal side in the method shown in FIG. 2 , and related descriptions are appropriately omitted to avoid repetition.

FIG. 3 is a schematic flowchart of the implementation of a nonlinear calibration method for a PA according to an embodiment of the present application, which can be applied to a network side device. As shown in FIG. 3 , the method 300 includes the following steps.

S302: The network side device sends configuration information, where the configuration information is used to configure the first resource, and the first resource is used by the terminal to perform nonlinear calibration on the first PA.

In the embodiment of the present application, the network-side device configures the terminal with the first resource, and the terminal performs nonlinear calibration on the first PA through the first resource, so that the output and input of the first PA satisfy a linear relationship as much as possible, and avoid nonlinear characteristics of the PA The resulting signal distortion improves the performance of the communication system.

Optionally, as an embodiment, the first resource includes at least one of the following: time domain resources, frequency domain resources, REs, delay domain resources, Doppler domain resources, and code domain resources.

It should be noted that, for the nonlinear calibration method of the PA provided in the embodiment of the present application, the execution subject may be the nonlinear calibration device of the PA, or, in the nonlinear calibration device of the PA, the method for executing the nonlinear calibration method of the PA may be executed. control module. In the embodiment of the present application, the nonlinear calibration method of the PA performed by the nonlinear calibration device of the PA is taken as an example to describe the nonlinear calibration device of the PA provided in the embodiment of the present application.

FIG. 4 is a schematic structural diagram of an apparatus for nonlinear calibration of a PA according to an embodiment of the present application, and the apparatus may correspond to terminals in other embodiments. As shown in FIG. 4 , the apparatus 400 includes the following modules.

The receiving module 402 may be configured to receive configuration information, where the configuration information is used to configure the first resource.

The calibration module 404 may be configured to perform nonlinear calibration on the first PA by using the first resource.

In the embodiment of the present application, the network-side device configures the terminal with the first resource, and the terminal performs nonlinear calibration on the first PA through the first resource, so that the output and input of the first PA satisfy a linear relationship as much as possible, and avoid nonlinear characteristics of the PA The resulting signal distortion improves the performance of the communication system.

Optionally, as an embodiment, the calibration module 404 is configured to at least one of the following: send a scan signal through the first resource, and acquire the nonlinear characteristics of the first PA according to the scan signal; The first resource updates a first distortion processing module, wherein the first distortion processing module is configured to compensate for signal distortion caused by nonlinear characteristics of the first PA.

Optionally, as an embodiment, the correlation between the scanning signal and the first target channel or signal satisfies a preset correlation condition.

Optionally, as an embodiment, the first distortion processing module is implemented based on an artificial intelligence model, and the calibration module 404 is configured to update the following 1) of the first distortion processing module through the first resource. At least one of to 4): 1) model parameters, 2) algorithm, 3) quantization level, 4) structure.

Optionally, as an embodiment, the first distortion processing module includes a fully connected network, and the model parameters include at least one of the following: a multiplicative weighting coefficient of neurons, an additive weighting coefficient of neurons; or the The first distortion processing module includes an RNN, and the model parameters include at least one of the following: a weighting coefficient of the cyclic unit, a multiplicative weighting coefficient of the cyclic unit, and an additive weighting coefficient of the cyclic unit; or the first distortion processing module includes a CNN , the model parameters include at least one of the following 1) to 3): 1) the weight coefficient of the convolution kernel, 2) the deviation amount of the convolution kernel, and 3) the pooling algorithm of the pooling layer.

Optionally, as an embodiment, the apparatus does not perform uplink transmission through the first resource.

Optionally, as an embodiment, the apparatus further includes a transmission module, which can be configured to perform uplink transmission through the first resource; wherein, at the moment of the uplink transmission, non-linear calibration is not performed on the first PA; or The uplink transmission uses a second distortion processing module, and the second distortion processing module is different from the first distortion processing module corresponding to the nonlinear calibration; or the uplink transmission uses a second PA, and the second PA is different from the first distortion processing module corresponding to the nonlinear calibration. The first PA is different; or the uplink transmission does not use the first distortion processing module corresponding to the nonlinear calibration.

Optionally, as an embodiment, the first distortion processing module is implemented based on an artificial intelligence model, and the second distortion processing module is not implemented based on an artificial intelligence model.

Optionally, as an embodiment, the second PA satisfies at least one of the following 1) to 3): 1) The second PA is connected to a third distortion processing module, and the third distortion processing module is used for Compensating the signal distortion caused by the nonlinear characteristics of the second PA; 2) performing predistortion processing on the signal input to the second PA; 3) performing distortion compensation processing on the signal output by the second PA.

Optionally, as an embodiment, the indicator requirement of the uplink transmission is lower than a preset indicator threshold.

Optionally, as an embodiment, within the first resource, the transmission power of the device satisfies at least one of the following 1) to 2): 1) the instantaneous power is lower than the first threshold; 2) the average power is low at the second threshold.

Optionally, as an embodiment, the transmission power includes one of the following 1) to 3): 1) TRP, 2) EIRP, and 3) EPRE.

Optionally, as an embodiment, the first threshold and/or the second threshold includes one of the following 1) to 2): 1) maximum allowable radiation dose, 2) human body safe radiation power.

Optionally, as an embodiment, the first threshold and/or the second threshold include the human body safe radiation power, and the calibration module is further configured to: detect the distance between the terminal and the human body; The human body safe radiation power is used when the distance between the terminal and the human body is less than the preset distance.

Optionally, as an embodiment, the apparatus further includes a transmission module, which can be configured to not perform uplink transmission or allow transmission of the second target channel or signal within the conflicting resources; wherein the conflicting resources include the first target channel or signal. A second resource and/or a third resource, where the second resource is a resource located before the first resource, and the third resource is a resource located after the first resource.

Optionally, as an embodiment, the resource amount of the third resource is greater than the resource amount of the second resource.

Optionally, as an embodiment, the apparatus includes at least two sets of radio frequency links, the first PA is located in the first radio frequency link, and the apparatus further includes a transmission module for performing transmission through the second radio frequency link. For uplink transmission, the first radio frequency link is different from the second radio frequency link.

Optionally, as an embodiment, the nonlinear calibration of the first PA is: periodic, semi-persistent, aperiodic, or event-triggered.

Optionally, as an embodiment, the event triggering includes at least one of the following 1) to 4): 1) the variation of the nonlinear characteristic of the first PA exceeds a preset linear threshold; 2) through all The indicator of the signal sent by the first PA is lower than the preset indicator threshold; 3) the working duration of the first PA exceeds the preset duration threshold; 4) the variation of the parameters of the environment in which the first PA is located exceeds the predetermined threshold. Set environmental parameter thresholds.

Optionally, as an embodiment, the calibration module 404 is further configured to perform nonlinear calibration on the first PA without using the first resource when the device is in a target state; wherein the target The states include one of the following 1) to 3): 1) idle state, 2) inactive state, 3) disconnected state.

Optionally, as an embodiment, the first resource includes at least one of the following 1) to 6): 1) time domain resource, 2) frequency domain resource, 3) RE, 4) delay domain resource, 5 ) Doppler domain resources, 6) Code domain resources.

For the apparatus 400 according to the embodiment of the present application, reference may be made to the process of the method 200 corresponding to the embodiment of the present application, and each unit/module and the above-mentioned other operations and/or functions in the apparatus 400 are respectively in order to implement the corresponding process in the method 200, And can achieve the same or equivalent technical effects, for the sake of brevity, details are not repeated here.

The nonlinear calibration device of the PA in the embodiment of the present application may be a device, and may also be a component, an integrated circuit, or a chip in a terminal. The device may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may include, but is not limited to, the types of terminals 11 listed above, and the non-mobile terminal may be a server, a network attached storage (NAS), a personal computer (personal computer, PC), a television ( television, TV), teller machine, or self-service machine, etc., which are not specifically limited in the embodiments of the present application.

The nonlinear calibration device of the PA in the embodiment of the present application may be a device with an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.

The non-linear calibration device for PA provided in the embodiment of the present application can implement each process implemented by the method embodiment in FIG. 2 and achieve the same technical effect. To avoid repetition, details are not repeated here.

FIG. 5 is a schematic structural diagram of an apparatus for nonlinear calibration of a PA according to an embodiment of the present application, and the apparatus may correspond to a network-side device in other embodiments. As shown in FIG. 5 , the apparatus 500 includes the following modules.

The sending module 502 may be configured to send configuration information, where the configuration information is used to configure a first resource, and the first resource is used for the terminal to perform nonlinear calibration on the first PA.

In the embodiment of the present application, the network-side device configures the terminal with the first resource, and the terminal performs nonlinear calibration on the first PA through the first resource, so that the output and input of the first PA satisfy a linear relationship as much as possible, and avoid nonlinear characteristics of the PA The resulting signal distortion improves the performance of the communication system.

Optionally, as an embodiment, the first resource includes at least one of the following 1) to 6): 1) time domain resource, 2) frequency domain resource, 3) RE, 4) delay domain resource, 5 ) Doppler domain resources, 6) Code domain resources.

For the apparatus 500 according to the embodiment of the present application, reference may be made to the process of the method 300 corresponding to the embodiment of the present application, and each unit/module and the above-mentioned other operations and/or functions in the apparatus 500 are respectively in order to implement the corresponding process in the method 300, And can achieve the same or equivalent technical effects, for the sake of brevity, details are not repeated here.

Optionally, as shown in FIG. 6 , an embodiment of the present application further provides a communication device 600, including a processor 601, a memory 602, a program or instruction stored in the memory 602 and executable on the processor 601, For example, when the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, each process of the above-mentioned embodiments of the PA nonlinear calibration method can be realized, and the same technical effect can be achieved. When the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, each process of the above-mentioned embodiment of the PA nonlinear calibration method can be realized, and the same technical effect can be achieved. To avoid repetition, details are not repeated here. .

FIG. 7 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.

The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710 and other components .

Those skilled in the art can understand that the terminal 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, so as to manage charging, discharging, and power consumption through the power management system management and other functions. The terminal structure shown in FIG. 7 does not constitute a limitation on the terminal, and the terminal may include more or less components than shown, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in this embodiment of the present application, the input unit 704 may include a graphics processor (Graphics Processing Unit, GPU) 7041 and a microphone 7042. Such as camera) to obtain still pictures or video image data for processing. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes a touch panel 7071 and other input devices 7072 . The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

In the embodiment of the present application, the radio frequency unit 701 receives the downlink data from the network side device, and then processes it to the processor 710; in addition, sends the uplink data to the network side device. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 709 may be used to store software programs or instructions as well as various data. The memory 709 may mainly include a storage program or instruction area and a storage data area, wherein the stored program or instruction area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), and the like. In addition, the memory 709 may include a high-speed random access memory, and may also include a non-volatile memory, wherein the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM) ), erasable programmable read-only memory (ErasablePROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. For example at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

The processor 710 may include one or more processing units; optionally, the processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, application programs or instructions, etc., Modem processors mainly deal with wireless communications, such as baseband processors. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 710.

The radio frequency unit 701 may be configured to receive configuration information, where the configuration information is used to configure the first resource; the processor 710 may be configured to perform nonlinear calibration on the first PA by using the first resource.

In the embodiment of the present application, the network-side device configures the terminal with the first resource, and the terminal performs nonlinear calibration on the first PA through the first resource, so that the output and input of the first PA satisfy a linear relationship as much as possible, and avoid nonlinear characteristics of the PA The resulting signal distortion improves the performance of the communication system.

The terminal 700 provided in this embodiment of the present application can also implement each process of the above-mentioned embodiments of the nonlinear calibration method for PA, and can achieve the same technical effect, which is not repeated here in order to avoid repetition.

Specifically, an embodiment of the present application further provides a network side device. As shown in FIG. 8 , the network side device 800 includes: an antenna 81 , a radio frequency device 82 , and a baseband device 83 . The antenna 81 is connected to the radio frequency device 82 . In the uplink direction, the radio frequency device 82 receives information through the antenna 81, and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent and sends it to the radio frequency device 82 , and the radio frequency device 82 processes the received information and sends it out through the antenna 81 .

The above-mentioned frequency band processing apparatus may be located in the baseband apparatus 83, and the method performed by the network side device in the above embodiments may be implemented in the baseband apparatus 83, where the baseband apparatus 83 includes a processor 84 and a memory 85.

The baseband device 83 may include, for example, at least one baseband board on which a plurality of chips are arranged. As shown in FIG. 8 , one of the chips is, for example, the processor 84 and is connected to the memory 85 to call the program in the memory 85 to execute The network-side device shown in the above method embodiments operates.

The baseband device 83 may further include a network interface 86 for exchanging information with the radio frequency device 82, and the interface is, for example, a common public radio interface (CPRI for short).

Specifically, the network-side device in this embodiment of the present application further includes: instructions or programs that are stored in the memory 85 and run on the processor 84, and the processor 84 invokes the instructions or programs in the memory 85 to execute the modules shown in FIG. 5 . The implementation method and achieve the same technical effect, in order to avoid repetition, it is not repeated here.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, each process of the above-mentioned embodiment of the nonlinear calibration method for a PA is implemented, and The same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.

The processor may be the processor in the terminal described in the foregoing embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

An embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used for running a program or an instruction to implement the nonlinear calibration method for the PA above Each process of the embodiment can achieve the same technical effect, and to avoid repetition, it will not be repeated here.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in the reverse order depending on the functions involved. To perform functions, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to some examples may be combined in other examples.

From the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in a part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network side device, etc.) execute the methods described in the various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims (42)

1. A nonlinear calibration method of a power amplifier PA, the method comprising:

   the terminal receives configuration information, where the configuration information is used to configure the first resource;

   Perform nonlinear calibration on the first PA by using the first resource.
2. The method according to claim 1, wherein the non-linear calibration of the first PA by using the first resource comprises at least one of the following:

   Send a scan signal through the first resource, and acquire the nonlinear characteristic of the first PA according to the scan signal;

   The first distortion processing module is updated by using the first resource, wherein the first distortion processing module is used for compensating for signal distortion caused by nonlinear characteristics of the first PA.
3. The method according to claim 2, wherein the correlation between the scanning signal and the first target channel or signal satisfies a preset correlation condition.
4. The method according to claim 2, wherein the first distortion processing module is implemented based on an artificial intelligence model, and the updating the first distortion processing module through the first resource comprises:

   Update at least one of the following of the first distortion processing module by using the first resource: model parameter, algorithm, quantization level, structure.
5. The method of claim 4, wherein,

   The first distortion processing module includes a fully connected network, and the model parameters include at least one of the following: a multiplicative weighting coefficient of a neuron, an additive weighting coefficient of a neuron; or

   The first distortion processing module includes a recurrent neural network RNN, and the model parameters include at least one of the following: a weighting coefficient of the recurrent unit, a multiplicative weighting coefficient of the recurrent unit, and an additive weighting coefficient of the recurrent unit; or

   The first distortion processing module includes a convolutional neural network CNN, and the model parameters include at least one of the following: the weight coefficient of the convolution kernel, the deviation of the convolution kernel, and the pooling algorithm of the pooling layer.
6. The method according to any one of claims 2 to 5, wherein the terminal does not perform uplink transmission through the first resource.
7. The method of claim 1, wherein the method further comprises: performing uplink transmission through the first resource;

   Wherein, the first PA is not non-linearly calibrated at the moment of the uplink transmission; or

   The uplink transmission uses a second distortion processing module, and the second distortion processing module is different from the first distortion processing module corresponding to the nonlinear calibration; or

   the uplink transmission uses a second PA, the second PA is different from the first PA; or

   The uplink transmission does not use the first distortion processing module corresponding to the nonlinear calibration.
8. The method of claim 7, wherein,

   The first distortion processing module is implemented based on an artificial intelligence model, and the second distortion processing module is not implemented based on an artificial intelligence model.
9. The method of claim 7, wherein the second PA satisfies at least one of the following:

   The second PA is connected to a third distortion processing module, and the third distortion processing module is configured to compensate for signal distortion caused by nonlinear characteristics of the second PA;

   The signal input to the second PA is pre-distorted;

   The signal output by the second PA is subjected to distortion compensation processing.
10. The method according to any one of claims 7 to 9, wherein the indicator requirement of the uplink transmission is lower than a preset indicator threshold.
11. The method according to claim 1, wherein, within the first resource, the transmission power of the terminal satisfies at least one of the following:

    The instantaneous power is lower than the first threshold;

    The average power is below the second threshold.
12. The method of claim 11, wherein the transmission power comprises one of the following: total radiated power TRP, effective isotropic radiated power EIRP, and energy EPRE per resource element.
13. The method according to claim 11, wherein the first threshold and/or the second threshold comprises one of the following: a maximum allowable radiation amount, a human body safe radiation power.
14. The method of claim 13, wherein the first threshold and/or the second threshold comprises the human body safe radiated power, the method further comprising:

    detecting the distance between the terminal and the human body;

    The human body safe radiation power is used when it is detected that the distance between the terminal and the human body is less than a preset distance.
15. The method of claim 1, wherein the method further comprises:

    In the conflicting resources, do not perform uplink transmission or allow transmission of the second target channel or signal;

    The conflicting resources include a second resource and/or a third resource, the second resource is a resource located before the first resource, and the third resource is a resource located after the first resource.
16. The method of claim 15, wherein the resource amount of the third resource is greater than the resource amount of the second resource.
17. The method according to claim 15, wherein the terminal includes at least two sets of radio frequency links, the first PA is located in the first radio frequency link, and the method further comprises:

    Uplink transmission is performed through a second radio frequency link, and the first radio frequency link is different from the second radio frequency link.
18. The method of claim 1, wherein the nonlinear calibration of the first PA is: periodic, semi-persistent, aperiodic, or event-triggered.
19. The method of claim 18, wherein the event triggering comprises at least one of the following:

    The variation of the nonlinear characteristic of the first PA exceeds a preset linear threshold;

    The indicator of the signal sent through the first PA is lower than the preset indicator threshold;

    The working duration of the first PA exceeds a preset duration threshold;

    The variation of the parameters of the environment in which the first PA is located exceeds a preset environment parameter threshold.
20. The method of claim 1, wherein the method further comprises:

    When the terminal is in the target state, non-linear calibration is not performed on the first PA by using the first resource;

    The target state includes one of the following: an idle state, an inactive state, and a disconnected state.
21. The method of claim 1, wherein the first resource comprises at least one of the following:

    Time domain resource, frequency domain resource, resource unit RE, time delay domain resource, Doppler domain resource, code domain resource.
22. A nonlinear calibration method for PA, the method includes:

    The network-side device sends configuration information, where the configuration information is used to configure the first resource, and the first resource is used by the terminal to perform nonlinear calibration on the first PA.
23. The method of claim 22, wherein the first resource comprises at least one of the following:

    Time domain resources, frequency domain resources, RE, time delay domain resources, Doppler domain resources, and code domain resources.
24. A nonlinear calibration device for PA, comprising:

    a receiving module, configured to receive configuration information, where the configuration information is used to configure the first resource;

    A calibration module, configured to perform nonlinear calibration on the first PA by using the first resource.
25. The apparatus of claim 24, wherein the calibration module is used for at least one of the following:

    Send a scan signal through the first resource, and acquire the nonlinear characteristic of the first PA according to the scan signal;

    The first distortion processing module is updated by using the first resource, wherein the first distortion processing module is used for compensating for signal distortion caused by nonlinear characteristics of the first PA.
26. The apparatus according to claim 25, wherein the first distortion processing module is implemented based on an artificial intelligence model, and the calibration module is used for:

    Update at least one of the following of the first distortion processing module by using the first resource: model parameter, algorithm, quantization level, structure.
27. The apparatus of claim 25 or 26, wherein the apparatus does not perform uplink transmission over the first resource.
28. The apparatus according to claim 24, further comprising a transmission module configured to perform uplink transmission through the first resource;

    Wherein, the first PA is not non-linearly calibrated at the moment of the uplink transmission; or

    The uplink transmission uses a second distortion processing module, and the second distortion processing module is different from the first distortion processing module corresponding to the nonlinear calibration; or

    the uplink transmission uses a second PA, the second PA is different from the first PA; or

    The uplink transmission does not use the first distortion processing module corresponding to the nonlinear calibration.
29. The apparatus of claim 28, wherein the second PA satisfies at least one of the following:

    The second PA is connected to a third distortion processing module, and the third distortion processing module is configured to compensate for signal distortion caused by nonlinear characteristics of the second PA;

    The signal input to the second PA is pre-distorted;

    The signal output by the second PA is subjected to distortion compensation processing.
30. The apparatus of claim 24, wherein, within the first resource, the transmission power of the apparatus satisfies at least one of the following:

    The instantaneous power is lower than the first threshold;

    The average power is below the second threshold.
31. The apparatus according to claim 30, wherein the first threshold and/or the second threshold comprises one of the following: a maximum allowable radiation amount, a human body safe radiation power.
32. The apparatus of claim 31, wherein the first threshold and/or the second threshold includes the human body safe radiated power, and the calibration module is further configured to:

    detecting the distance between the terminal and the human body;

    The human body safe radiation power is used when it is detected that the distance between the terminal and the human body is less than a preset distance.
33. The apparatus of claim 24, further comprising a transmission module for:

    In the conflicting resources, do not perform uplink transmission or allow transmission of the second target channel or signal;

    The conflicting resources include a second resource and/or a third resource, the second resource is a resource located before the first resource, and the third resource is a resource located after the first resource.
34. The apparatus of claim 33, wherein the apparatus comprises at least two sets of radio frequency links, the first PA is located in the first radio frequency link, and the apparatus further comprises a transmission module for:

    Uplink transmission is performed through a second radio frequency link, and the first radio frequency link is different from the second radio frequency link.
35. 25. The apparatus of claim 24, wherein the nonlinear calibration of the first PA is: periodic, semi-persistent, aperiodic, or event-triggered.
36. The apparatus of claim 35, wherein the event triggering comprises at least one of the following:

    The variation of the nonlinear characteristic of the first PA exceeds a preset linear threshold;

    The indicator of the signal sent through the first PA is lower than the preset indicator threshold;

    The working duration of the first PA exceeds a preset duration threshold;

    The variation of the parameters of the environment in which the first PA is located exceeds a preset environment parameter threshold.
37. The apparatus according to claim 24, wherein the calibration module is further configured to perform nonlinear calibration on the first PA without using the first resource when the apparatus is in a target state;

    The target state includes one of the following: an idle state, an inactive state, and a disconnected state.
38. A nonlinear calibration device for PA, comprising:

    A sending module, configured to send configuration information, where the configuration information is used to configure a first resource, and the first resource is used for the terminal to perform nonlinear calibration on the first PA.
39. The apparatus of claim 38, wherein the first resource comprises at least one of the following:

    Time domain resources, frequency domain resources, RE, time delay domain resources, Doppler domain resources, and code domain resources.
40. A terminal, comprising a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being executed by the processor to implement any one of claims 1 to 21. A non-linear calibration method of the PA described.
41. A network-side device, comprising a processor, a memory, and a program or instruction stored on the memory and running on the processor, the program or instruction being executed by the processor to achieve as claimed in claim 22 or The nonlinear calibration method of PA described in 23.
42. A readable storage medium, on which a program or an instruction is stored, and when the program or instruction is executed by the processor, the nonlinear calibration method of the PA according to any one of claims 1 to 21 is implemented , or realize the nonlinear calibration method of the PA as claimed in claim 22 or 23.

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