Adaptive peak-to-average power ratio (PAPR) mitigation apparatus, method and communication device

Abstract

The application relates to a self-adaptive peak-to-average power ratio (PAPR) suppression device, method and communication equipment. The PAPR suppression device comprises a first clipping module and a second clipping module. The second clipping module outputs a to-be-clipped signal satisfying an input condition of the first clipping module to the first clipping module. The input condition comprises a peak value distribution characteristic of an input signal. The first clipping module performs first clipping processing on the to-be-clipped signal to obtain a first clipped signal. The PAPR is suppressed through cooperation of the two-stage clipping modules. Compared with configuration of simple clipping parameters in the related art (typical scenario), the PAPR is controllable, and the power amplifier is protected. Compared with a mode of extracting each peak value and performing clipping processing in a harsh scenario, the mode of pre-configuring clipping parameters according to statistical characteristics in the application is simpler.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an adaptive peak-to-average ratio (PAPR) suppression device, method, and communication equipment. Background Art

[0002] OFDM (Orthogonal Frequency Division Multiplexing) is a multi-carrier modulation technology in which the multiple carriers are orthogonal. Since OFDM is composed of multiple independently modulated subcarrier signals superimposed, when the phases of the subcarriers are the same or similar, the superimposed signal will produce a large instantaneous power peak, thereby resulting in a higher peak-to-average power ratio (PAPR), also known as peak-to-average power ratio.

[0003] If a high PAPR signal is fed directly into a power amplifier, it will cause nonlinear distortion, generating new frequency components that affect the demodulation results and, in severe cases, even damage the amplifier. In related technologies, transmitters employ clipping algorithms on the intermediate frequency side to reduce PAPR, protect the amplifier, and improve efficiency. Summary of the Invention

[0004] In view of this, an adaptive peak-to-average-ratio (PAPR) suppression device, method, and communication equipment are proposed. PAPR suppression is performed through the cooperation of two-stage clipping modules. The implementation is simple, adaptable to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier.

[0005] In a first aspect, an embodiment of the present application provides an adaptive peak-to-average ratio (PAPR) suppression device, the device comprising: a first clipping module and a second clipping module, the second clipping module outputting a signal to be clipped that meets the input conditions of the first clipping module to the first clipping module, the input conditions including the peak distribution characteristics of the input signal; the first clipping module performing a first clipping process on the signal to be clipped to obtain a first clipping signal.

[0006] According to the PAPR suppression device of the embodiment provided in the present application, PAPR suppression is performed through the cooperation of two-stage clipping modules. Compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the implementation method of the present application of pre-configuring clipping parameters according to statistical characteristics is simpler, which solves the technical problems in related technologies of high complexity of static clipping algorithms or limited application scenarios.

[0007] According to a first possible implementation method of the first aspect, the second clipping module is used to obtain an input signal, and when the carrier parameters of the input signal do not meet the input conditions of the first clipping module, the input signal is subjected to a second clipping process according to the carrier parameters of the input signal and the input conditions to obtain the signal to be clipped.

[0008] According to the first aspect and the first possible implementation method of the first aspect, in the second possible implementation method, the second clipping module is used to obtain the input signal, and when the carrier parameters of the input signal meet the input conditions of the first clipping module, output the input signal as the signal to be clipped to the first clipping module.

[0009] According to the PAPR suppression device of the above embodiment of the present application, different clipping processes are adopted for the input signal through the cooperation between the two clipping modules to realize the adaptive clipping process. The implementation method is simple and can adapt to more application scenarios.

[0010] According to the first aspect, in a third possible implementation manner, in the bypass mode, the second clipping module is further configured to obtain the input signal and output the input signal to the first clipping module;

[0011] The first clipping module is used to perform a third clipping process on the input signal according to the clipping parameters corresponding to the carrier parameters of the input signal; wherein the clipping parameters are configured for different carriers based on the statistical characteristics of the peak distribution of the input signal.

[0012] According to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the carrier parameter is an inter-carrier power ratio, and the clipping parameter is a weighting coefficient of clipping noise.

[0013] According to the PAPR suppression device of the above-mentioned embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the first clipping module implements adaptive weighted distribution of clipping noise. Compared to the simple clipping parameter configuration in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared to the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0014] According to the first possible implementation manner of the first aspect, in a fifth possible implementation manner, the input condition of the first clipping module is a static first inter-carrier statistical feature,

[0015] The second clipping module is configured to perform a second clipping process on the input signal according to the carrier parameter of the input signal and the first inter-carrier statistical feature to obtain the signal to be clipped when the carrier parameter of the input signal does not satisfy the first inter-carrier statistical feature;

[0016] The first clipping module is configured to perform a first clipping process on the signal to be clipped according to a clipping parameter corresponding to a first inter-carrier statistical feature to obtain the first clipping signal.

[0017] According to the PAPR suppression device of the above-mentioned embodiment of the present application, the second clipping module adaptively starts clipping processing according to the relationship between the statistical characteristics of the input signal and the first carrier, and the process of clipping the input signal can adapt to the PAPR control of any scenario signal, and the implementation method is simple.

[0018] According to the first possible implementation manner of the first aspect, in a sixth possible implementation manner, the input condition of the first clipping module is a dynamic second inter-carrier statistical feature, wherein the first clipping module is configured to periodically update the second carrier statistical feature and the clipping parameter corresponding to the second carrier statistical feature,

[0019] The second clipping module is configured to perform a second clipping process on the input signal according to the carrier parameter of the input signal and the second inter-carrier statistical feature to obtain the signal to be clipped when the carrier parameter of the input signal does not satisfy the second inter-carrier statistical feature;

[0020] The first clipping module is configured to perform a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the second inter-carrier statistical feature to obtain the first clipping signal.

[0021] According to the PAPR suppression device of the above-described embodiment of the present application, the second clipping module adaptively initiates clipping processing based on the relationship between the input signal and the second inter-carrier statistical feature, and performs clipping processing on the input signal. The first clipping module periodically calculates the inter-carrier characteristics of the input signal and updates the locally configured second inter-carrier statistical feature and corresponding clipping parameters based on the calculated inter-carrier characteristics, thereby also achieving adaptive clipping processing. The cooperation of these two modules capable of adaptive clipping processing can adapt to PAPR control of signals in any scenario, and the implementation is simple.

[0022] According to the fifth or sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the carrier parameters, the first inter-carrier statistical characteristics, and the second carrier statistical characteristics of the input signal include inter-carrier power ratio.

[0023] In a second aspect, an embodiment of the present application provides a communication device, comprising the adaptive peak-to-average ratio (PAPR) suppression apparatus as described in any one of the implementations of the first aspect.

[0024] In a third aspect, an embodiment of the present application provides a communication system, comprising a baseband unit BBU, and further comprising a remote radio frequency unit RRU or an active antenna processing unit AAU; the first clipping module as described in any one of the implementations in the first aspect is located in the RRU or the AAU, and the second clipping module as described in any one of the implementations in the first aspect is located in the BBU; or, as described in any one of the implementations in the first aspect, both the first clipping module and the second clipping module are located in the RRU or the AAU.

[0025] In a fourth aspect, an embodiment of the present application provides an adaptive peak-to-average ratio (PAPR) suppression method, which is applied to a communication device and includes:

[0026] The communication device performs a second clipping process on an input signal whose carrier parameters do not meet an input condition to obtain a signal to be clipped, and performs a first clipping process on the signal to be clipped to obtain a first clipping signal; wherein the input condition includes a peak distribution feature of the input signal, and the carrier parameters of the signal to be clipped meet the input condition.

[0027] The PAPR suppression method of the present application obtains a signal to be clipped that meets the peak distribution characteristics by pre-processing (second clipping processing) the input signal that does not meet the peak distribution characteristics, and then performs the first clipping processing on the signal to be clipped to obtain the first clipping signal. Through the step-by-step processing and two-stage clipping method, compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned implementation method of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters according to statistical characteristics and pre-processing the input signal in the present application is simpler to implement, which solves the technical problems of high complexity or limited application scenarios of static clipping algorithms in related technologies.

[0028] According to a first possible implementation manner of the fourth aspect, the communication device performs second clipping processing on an input signal whose carrier parameters do not meet an input condition to obtain a signal to be clipped, including:

[0029] When the carrier parameter of the input signal does not meet the input condition, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped.

[0030] According to the fourth aspect or the first possible implementation of the fourth aspect, in a second possible implementation, the method further includes: the communication device performs a first clipping process on the input signal whose carrier parameters meet the input conditions to obtain a first clipping signal.

[0031] According to the PAPR suppression method of the above-mentioned embodiment of the present application, different clipping processes are adopted for the input signal according to the relationship between the carrier parameters of the input signal and the input conditions. Compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters according to statistical characteristics and pre-processing the input signal in the present application is simpler to implement, and solves the technical problems in related technologies of excessive complexity of static clipping algorithms or limited application scenarios.

[0032] According to a third possible implementation manner of the fourth aspect, the method further includes:

[0033] The communication device performs a third clipping process on the input signal according to the clipping parameters corresponding to the carrier parameters of the input signal; wherein the clipping parameters are configured for different carriers according to the statistical characteristics of the peak distribution of the input signal.

[0034] According to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the carrier parameter is the power ratio between carriers, and the clipping parameter is a weighting coefficient of the clipping noise.

[0035] According to the PAPR suppression method of the above-mentioned embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the communication device can achieve adaptive weighted distribution of clipping noise. Compared with the simple clipping parameter configuration in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0036] According to the first possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the input condition is a static first inter-carrier statistical feature,

[0037] When the carrier parameter of the input signal does not meet the input condition, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped, including:

[0038] When the carrier parameter of the input signal does not satisfy the first inter-carrier statistical feature, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the first inter-carrier statistical feature to obtain the signal to be clipped;

[0039] The communication device performs a first clipping process on the signal to be clipped to obtain a first clipping signal, comprising:

[0040] The communication device performs a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the first inter-carrier statistical feature to obtain the first clipping signal.

[0041] According to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the method further includes:

[0042] The communication device configures a clipping parameter corresponding to the first inter-carrier statistical feature according to the first inter-carrier statistical feature.

[0043] According to the PAPR suppression method of the above-mentioned embodiment of the present application, by adaptively starting the clipping process according to the relationship between the statistical characteristics of the input signal and the first carrier, and performing the clipping process on the input signal, it can adapt to the PAPR control of any scenario signal, and the implementation method is simple.

[0044] According to the first possible implementation manner of the fourth aspect, in a seventh possible implementation manner, the input condition is a dynamic second carrier statistical feature, and the method further includes:

[0045] The communication device periodically acquires new second carrier statistical features, and configures clipping parameters corresponding to the new second carrier statistical features according to the new second carrier statistical features.

[0046] According to the seventh possible implementation manner of the fourth aspect, in an eighth possible implementation manner, when the carrier parameter of the input signal does not meet the input condition, the communication device performs second clipping processing on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped, including:

[0047] When the carrier parameter of the input signal does not satisfy the second inter-carrier statistical feature, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the second inter-carrier statistical feature to obtain the signal to be clipped;

[0048] The communication device performs a first clipping process on the signal to be clipped to obtain a first clipping signal, comprising:

[0049] The communication device performs first clipping processing on the to-be-clipped signal according to the clipping parameter corresponding to the second inter-carrier statistical feature, to obtain the first clipped signal.

[0050] According to the PAPR suppression method of the above-mentioned embodiments of the present application, by adaptively starting the second clipping processing according to the relationship between the input signal and the second inter-carrier statistical feature, and the process of performing the second clipping processing on the input signal, the inter-carrier features of the input signal are periodically counted, and the locally configured second inter-carrier statistical feature and the corresponding clipping parameter are updated according to the counted inter-carrier features, and adaptive first clipping processing can also be realized. Through the cooperation of the two processes that can perform adaptive clipping processing, the PAPR control of any scene signal can be adapted, and the implementation is simple.

[0051] According to any one of the fifth to eighth possible implementation manners of the fourth aspect, in a ninth possible implementation manner, the carrier parameter, the first inter-carrier statistical feature, and the second inter-carrier statistical feature of the input signal are inter-carrier power ratios.

[0052] In a fifth aspect, an embodiment of the present application provides an adaptive peak-to-average power ratio (PAPR) suppression device, which is applied to a communication device, and the device comprises:

[0053] The clipping unit is configured to perform second clipping processing on the input signal whose carrier parameter does not satisfy the input condition to obtain a to-be-clipped signal, and perform first clipping processing on the to-be-clipped signal to obtain a first clipped signal; wherein the input condition comprises a peak value distribution feature of the input signal, and the carrier parameter of the to-be-clipped signal satisfies the input condition.

[0054] The PAPR suppression device of the present application performs preprocessing (second clipping processing) on the input signal that does not satisfy the peak value distribution feature to obtain a to-be-clipped signal that satisfies the peak value distribution feature, and then performs first clipping processing on the to-be-clipped signal to obtain a first clipped signal. Through the two-stage clipping mode of step-by-step processing, compared with the configuration of a simple clipping parameter in the related art (typical scene), the above-mentioned embodiments of the present application can adapt to multiple scenes, ensure no missed clipping and controllable PAPR, and protect the power amplifier; compared with the mode of extracting each peak value and performing clipping processing in a harsh scene, the mode of pre-configuring a clipping parameter according to a statistical feature and preprocessing an input signal in the present application has a simpler implementation, and solves the technical problems of high complexity of a static clipping algorithm or limited application scenarios in the related art.

[0055] According to the first possible implementation manner of the fifth aspect, the clipping unit comprises:

[0056] a second clipping module, configured to perform a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition, to obtain the to-be-clipped signal, when the carrier parameter of the input signal does not satisfy the input condition.

[0057] In a second possible implementation manner of the fifth aspect or the first possible implementation manner of the fifth aspect, the apparatus further includes:

[0058] a first clipping module, configured to perform a first clipping process on the input signal whose carrier parameter satisfies the input condition, to obtain a first clipped signal.

[0059] According to the PAPR suppression apparatus in the above-mentioned embodiments of the present application, different clipping processes are adopted according to the relationship between the carrier parameter of the input signal and the input condition, compared with the simple clipping parameter configuration in the related art (typical scenario), the above-mentioned embodiments of the present application can adapt to multiple scenarios, ensure no missed clipping and controllable PAPR, and protect the power amplifier; compared with the way of extracting each peak value and performing a clipping process in a harsh scenario, the way of pre-configuring a clipping parameter according to the statistical characteristics and pre-processing the input signal in the present application has a simpler implementation manner, and solves the technical problem of high complexity of the static clipping algorithm or limited application scenarios in the related art.

[0060] In a third possible implementation manner of the fifth aspect, the apparatus further includes:

[0061] a third clipping module, configured to perform a third clipping process on the input signal according to the clipping parameter corresponding to the carrier parameter of the input signal; wherein the clipping parameter is configured for different carriers according to the statistical characteristics of the peak value distribution of the input signal.

[0062] In a fourth possible implementation manner of the third possible implementation manner of the fifth aspect, the carrier parameter is an inter-carrier power ratio, and the clipping parameter is a weighting coefficient of clipping noise.

[0063] According to the PAPR suppression apparatus in the above-mentioned embodiments of the present application, different clipping parameters are configured for different carriers according to the statistical characteristics of the peak value distribution of the input signal, which realizes adaptive weighting allocation of clipping noise by the communication device, compared with the simple clipping parameter configuration in the related art (typical scenario), the above-mentioned embodiments of the present application can adapt to multiple scenarios, ensure no missed clipping and controllable PAPR, and protect the power amplifier. Compared with the way of extracting each peak value and performing a clipping process in a harsh scenario, the way of pre-configuring a clipping parameter according to the statistical characteristics in the present application has a simpler implementation manner.

[0064] In a seventh possible implementation form of the fifth possible implementation form of the first aspect, the input condition is a dynamic second inter-carrier statistical feature, and the apparatus further comprises:

[0065] The second clipping module is further configured to perform second clipping processing on the input signal according to a carrier parameter of the input signal and the first inter-carrier statistical feature, to obtain the to-be- clipped signal, when the carrier parameter of the input signal does not satisfy the first inter-carrier statistical feature.

[0066] The first clipping module is further configured to perform first clipping processing on the to-be- clipped signal according to a clipping parameter corresponding to the first inter-carrier statistical feature, to obtain the first- clipped signal.

[0067] In a sixth possible implementation form of the fifth possible implementation form of the first aspect, the apparatus further comprises:

[0068] A first configuration module configured to configure a clipping parameter corresponding to the first inter-carrier statistical feature according to the first inter-carrier statistical feature.

[0069] The PAPR suppression apparatus according to the above-mentioned embodiments of the present application can adapt to PAPR control of any scene signal and has a simple implementation, by adaptively starting clipping processing according to a relationship between the input signal and the first inter-carrier statistical feature, and performing clipping processing on the input signal.

[0070] In a seventh possible implementation form of the first possible implementation form of the fifth aspect, the input condition is a dynamic second inter-carrier statistical feature, and the apparatus further comprises:

[0071] A second configuration module configured to periodically acquire a new second inter-carrier statistical feature, and configure a clipping parameter corresponding to the new second inter-carrier statistical feature according to the new second inter-carrier statistical feature.

[0072] In an eighth possible implementation form of the seventh possible implementation form of the fifth aspect, the second clipping module is further configured to perform second clipping processing on the input signal according to a carrier parameter of the input signal and the second inter-carrier statistical feature, to obtain the to-be- clipped signal, when the carrier parameter of the input signal does not satisfy the second inter-carrier statistical feature.

[0073] The first clipping module is further configured to perform first clipping processing on the to-be- clipped signal according to a clipping parameter corresponding to the second inter-carrier statistical feature, to obtain the first- clipped signal.

[0074] According to the PAPR suppression device of the above-mentioned embodiments of the present application, by means of the adaptive second clipping process started according to the relationship between the input signal and the second inter-carrier statistical feature, and the process of second clipping of the input signal, the inter-carrier feature of the input signal is periodically counted, and the locally configured second inter-carrier statistical feature and the corresponding clipping parameter are updated according to the counted inter-carrier feature, so that the adaptive first clipping process can also be realized. Through the cooperation of the two processes that can perform adaptive clipping, the PAPR control of any scene signal can be adapted, and the implementation is simple.

[0075] According to any one of the fifth to eighth possible implementation manners of the fifth aspect, in a ninth possible implementation manner, the carrier parameter of the input signal, the first inter-carrier statistical feature, and the second inter-carrier statistical feature are inter-carrier power ratios.

[0076] In a sixth aspect, the embodiments of the present application provide a PAPR suppression device, comprising:

[0077] a processor, and a memory for storing processor-executable instructions; wherein the processor is configured to implement the method of the fourth aspect or any one of the implementation manners of the fourth aspect when executing the instructions.

[0078] In a seventh aspect, the embodiments of the present application provide a non-volatile computer-readable storage medium having computer program instructions stored thereon, and the computer program instructions are executed by a processor to implement the method of the fourth aspect or any one of the implementation manners of the fourth aspect.

[0079] In an eighth aspect, the embodiments of the present application provide a terminal device, which can execute the PAPR suppression method of the fourth aspect or one or more of the possible implementation manners of the fourth aspect.

[0080] In a ninth aspect, the embodiments of the present application provide a computer program product, comprising computer-readable code, or a non-volatile computer-readable storage medium carrying computer-readable code, and when the computer-readable code is executed in an electronic device, a processor in the electronic device executes the PAPR suppression method of the fourth aspect or one or more of the possible implementation manners of the fourth aspect.

[0081] These and other aspects of the present application will become more fully understood from the following description of (one or more) embodiments, given by way of example only, and with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0082] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0083] Figure 1a and Figure 1b Examples of clipping scenarios in related technologies are shown respectively.

[0084] Figure 2 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application.

[0085] Figure 3 A schematic diagram illustrating an application scenario according to an embodiment of the present application.

[0086] Figure 4 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application.

[0087] Figure 5 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application.

[0088] Figure 6 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application.

[0089] Figure 7 A block diagram of a communication device according to an embodiment of the present application is shown.

[0090] Figure 8 FIG. 1 is a flowchart of a PAPR suppression method according to an embodiment of the present application.

[0091] Figure 9 FIG. 1 is a flowchart of a PAPR suppression method according to an embodiment of the present application.

[0092] Figure 10 FIG. 1 is a flowchart of a PAPR suppression method according to an embodiment of the present application.

[0093] Figure 11 FIG. 1 is a flowchart of a PAPR suppression method according to an embodiment of the present application.

[0094] Figure 12 FIG. 1 is a flowchart of a PAPR suppression method according to an embodiment of the present application.

[0095] Figure 13 FIG. 1 is a flowchart of a PAPR suppression method according to an embodiment of the present application.

[0096] Figure 14 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application. DETAILED DESCRIPTION

[0097] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0098] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0099] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0100] Glossary:

[0101] Clipping: For signals with large peak values, a threshold is set to suppress peak values ​​that exceed the threshold. The process of clipping is called clipping.

[0102] Clipping noise: The difference between the original signal and the clipping threshold.

[0103] Carrier parameters: characteristic parameters of the signal's carrier, such as the carrier's modulation mode, spectrum occupancy, power spectrum density, or inter-carrier instantaneous information, which may include inter-carrier power ratio.

[0104] The carrier modulation mode may refer to different modulation modes such as the phase and amplitude of the carrier data, and the carrier spectrum occupancy may refer to the spectrum width occupied by the carrier, the location of the carrier frequency, etc. Inter-carrier instantaneous information may refer to the parameter relationship between carriers at a certain moment, and the inter-carrier power ratio may refer to the ratio of power allocations between different carriers.

[0105] Inter-carrier statistical characteristics: the statistical results of the relationship between the parameters of the carriers of the input signal within a certain period of time.

[0106] If the IF clipping algorithm is designed according to the most stringent scenario, the implementation overhead will be high and the complexity will be high; if the IF clipping algorithm is designed according to the typical scenario, although the implementation complexity is reduced, its adaptability is poor, and when the signal peak characteristics change, missed clipping will occur, affecting the robustness of the power amplifier.

[0107] Figure 1a and Figure 1b For example, in a harsh scenario, the power characteristic of the input signal is turned on, resulting in a dense distribution of the peak value of the input signal, such as Figure 1a As shown. At this time, according to the most stringent scenario clipping, each extracted peak needs to be clipped, which is highly complex and expensive to implement. In a typical scenario, the power feature of the input signal is not enabled, the peak distribution characteristics of the input signal have not changed (or have changed little), and the peak distribution of the input signal is sparse, such as Figure 1b In this case, clipping can be performed according to the typical scenario design. However, the applicable scenarios of clipping processing are limited, and its application in complex scenarios may result in some peak values ​​being missed.

[0108] Therefore, the technical problem to be solved by this application is that the intermediate frequency static clipping algorithm in the related art is too complex or has limited application scenarios.

[0109] In order to solve the above technical problems, the present application proposes an adaptive peak-to-average ratio (PAPR) suppression device. Figure 2 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application. Figure 3 A schematic diagram illustrating an application scenario according to an embodiment of the present application.

[0110] exist Figure 3In the scenario shown, the communication equipment may include a BBU (Building Baseband Unit), an RRU (Radio Remote Unit), and / or an AAU (Active Antenna Unit). With the advent of 3G (third-generation mobile communication technology), base stations with separate baseband and radio frequency units (RFUs) emerged. These base stations are called distributed base stations, with the baseband unit being called the BBU and the radio frequency unit being called the RRU. The RRU can be hung on the wall of the equipment room, installed in a standard cabinet, and connected to the antenna via a feeder cable; or it can be installed on a tower, with the BBU and RRU connected via fiber optic cables and the RRU connected to the antenna via patch cables. With the advent of 4G (the fourth generation of mobile communication technology), the traditional integrated macro base station has been completely replaced by a BBU + RRU + antenna model. Some BBUs are even located in a single equipment room, forming a BBU pool. 5G (5th Generation) introduces Massive MIMO (multiple-in, multiple-out) technology, giving rise to the AAU. Higher-order MIMO requires more antennas, which in turn requires more feeders and, consequently, more feeder interfaces on the RRU, increasing the complexity of the process. Feeder lines themselves also have certain losses, which can affect some system performance. Therefore, 5G integrates the RRU and the traditional passive antenna into one, creating the latest AAU.

[0111] The PAPR suppression device provided in the embodiment of the present application may include Figure 2 The first clipping module 11 and the second clipping module 12 are shown. Figure 2 As shown, the input end of the second clipping module 12 is used to receive an input signal, the output end of the second clipping module 12 is connected to the input end of the first clipping module 11, and the output end of the first clipping module 11 outputs a clipped signal.

[0112] In one possible implementation, the input condition includes a peak distribution characteristic of the input signal. The peak distribution characteristic of the input signal may include a statistical characteristic of the peak distribution of the input signal, and the peak distribution characteristic of the input signal is mainly affected by factors such as the power ratio between carriers, the carrier modulation method, and the spectrum occupancy of the input signal. The power ratio between carriers may refer to the ratio of power configurations between different carriers, the modulation method of the carrier may refer to different modulation methods such as the phase and amplitude of the carrier-carried data, and the spectrum occupancy of the carrier may refer to the spectrum width occupied by the carrier, the position of the carrier frequency, and the like.

[0113] That is, the first clipping module 11 may include clipping parameters configured according to the statistical characteristics of the peak distribution of the input signal. When the carrier parameter of the input signal meets the input conditions, the first clipping module 11 may directly perform the first clipping process on the input signal according to the carrier parameter of the input signal and the clipping parameters. In one possible implementation, the clipping parameters may refer to data related to the distribution method of clipping noise, for example, the proportion of clipping noise distribution when clipping different carriers, or the weighting coefficient of the clipping noise corresponding to different carriers when clipping different carriers.

[0114] For example, assuming that the inter-carrier power ratio of the input signal is 1:1, the first clipping module 11 is configured to have a noise distribution ratio of 1:1 during clipping when the inter-carrier power ratio of the input signal is 1:1. When the inter-carrier power ratio of the input signal is determined to be 1:1 based on the carrier parameters of the input signal, the first clipping module 11 can perform the first clipping process on the input signal according to the configured clipping parameters (clipping noise distribution ratio of 1:1).

[0115] The second clipping module 12 may output a signal to be clipped that meets the input condition of the first clipping module 11 to the first clipping module 11 , and the first clipping module may perform a first clipping process on the signal to be clipped to obtain a first clipping signal.

[0116] In a possible implementation, the second clipping module 12 is configured to determine whether to start the second clipping process on the input signal according to whether the carrier parameters of the input signal meet the input conditions of the first clipping module 11 .

[0117] In one possible implementation, the second clipping module 12 is configured to obtain the input signal and, when a carrier parameter of the input signal meets the input condition of the first clipping module 11, output the input signal as a signal to be clipped to the first clipping module 11. For example, when the carrier parameter of the input signal meets the input condition of the first clipping module 11, the second clipping module 12 may not start the second clipping process on the input signal, or in other words, turn off the second clipping process on the input signal. In other words, when the carrier parameter of the input signal meets the input condition of the first clipping module 11, the second clipping module 12 may not perform the second clipping process on the input signal.

[0118] In another possible implementation, the second clipping module 12 is configured to obtain an input signal and, when the carrier parameter of the input signal does not meet the input conditions of the first clipping module 11, perform a second clipping process on the input signal based on the carrier parameter of the input signal and the input conditions to obtain the signal to be clipped. For example, when the carrier parameter of the input signal does not meet the input conditions of the first clipping module 11, the second clipping module 12 may determine to initiate the second clipping process on the input signal. Specifically, the second clipping process may be performed on the input signal, and the carrier parameter of the signal to be clipped after the second clipping process meets the input conditions of the first clipping module 11.

[0119] That is to say, the second clipping module 12 can be used to preprocess the input signal (second clipping processing) when the carrier parameters of the input signal do not meet the input conditions of the first clipping module 11. The carrier parameters of the preprocessed signal to be clipped meet the input conditions of the first clipping module 11, so that the first clipping module 11 can perform the first clipping processing on the signal to be clipped to obtain a first clipping signal.

[0120] In one possible implementation, the first clipping module 11 can be located in an RRU or AAU on the IF side, and the second clipping module 12 can be located in a BBU on the baseband side or in an RRU or AAU on the IF side. The first clipping module 11 and the second clipping module 12 cooperate to implement IF clipping of the input signal.

[0121] According to the PAPR suppression device of the embodiment provided in the present application, PAPR suppression is performed through the cooperation of two-stage clipping modules. Compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the implementation method of the present application of pre-configuring clipping parameters according to statistical characteristics is simpler, which solves the technical problems in related technologies of high complexity of static clipping algorithms or limited application scenarios.

[0122] In another possible implementation, in bypass mode, the second clipping module 12 is further configured to obtain an input signal and output the input signal to the first clipping module 11; the first clipping module 11 is configured to perform a third clipping process on the input signal based on a clipping parameter corresponding to a carrier parameter of the input signal; wherein the clipping parameter is configured for different carriers based on statistical characteristics of the peak distribution of the input signal. Alternatively, the second clipping module 12 may not be deployed, and the first clipping module 11 may directly obtain the input signal and perform the third clipping process on the input signal based on the clipping parameter corresponding to the carrier parameter of the input signal.

[0123] In a possible implementation, the carrier parameter may be the power ratio between carriers, the clipping parameter may be the weighted coefficient of the clipping noise, and the first clipping module 11 is configured to determine the weighted coefficient of the clipping noise according to the clipping parameter corresponding to the power ratio between carriers.

[0124] In this embodiment, the clipping parameters are configured for different carriers based on the statistical characteristics of the peak distribution of the input signal. The first clipping module can adaptively adjust the weighting coefficient of the clipping noise according to the power ratio between the carriers of the input signal, and perform a third clipping process on the input signal according to the weighting coefficient of the clipping noise.

[0125] According to the PAPR suppression device of the above-described embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the first clipping module 11 implements adaptive weighted distribution of clipping noise. Compared to the simple clipping parameter configuration in related technologies (typical scenarios), the above-described embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared to the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0126] In addition, according to the PAPR suppression device of the above-mentioned embodiment of the present application, the clipping noise can be adaptively distributed according to the power ratio between carriers, which can better distribute the clipping noise and ensure system performance. The following is a detailed description of the PAPR suppression device of the present application in several different embodiments.

[0127] The second clipping module 12 is bypassed, and the first clipping module 11 performs adaptive clipping.

[0128] Figure 4 FIG. 4 is a block diagram of a PAPR suppression device according to an embodiment of the present application.

[0129] In this embodiment, the input conditions of the first clipping module 11 can be set relatively broadly so that all input signals can meet the input conditions. In this way, the second clipping module 12 can work in the bypass mode without performing any processing on the input signal. After obtaining the input signal, the second clipping module 12 can directly output the input signal to the input end of the first clipping module 11. Figure 4 As shown, the second clipping module 12 is represented by a dotted box and operates in a bypass mode.

[0130] Alternatively, in this embodiment, the second clipping module 12 may not be deployed, and only the first clipping module 11 may be deployed. The first clipping module 11 may directly obtain the input signal and perform the third clipping process on the input signal according to the clipping parameters corresponding to the carrier parameters of the input signal.

[0131] As can be seen from the above, the first clipping module 11 can be configured with corresponding clipping parameters based on the statistical characteristics of the peak distribution of the input signal. The statistical characteristics of the peak distribution can be carrier characteristics, such as the power configuration between carriers, the modulation mode of the carriers, and the spectrum occupancy of the carriers. In an embodiment of the present application, different clipping parameters can be configured for different carriers based on the statistical characteristics of the peak distribution of the input signal. In this way, the first clipping module 11 can adaptively perform the third clipping processing on the input signal based on the carrier parameters of the input signal and the clipping parameters configured based on the statistical characteristics of the carrier.

[0132] In a possible implementation, different carriers of the input signal and the clipping parameters corresponding to the different carriers can be recorded in a table. In this way, the first clipping module 11 can obtain the corresponding clipping parameters by looking up the table according to the carrier parameters of the input signal.

[0133] For example, take the power ratio between carriers as an example. Figure 4 As shown, assuming that the power ratio between carriers includes 1:2 and 1:1 according to statistics, the clipping parameters corresponding to 1:2 and 1:1 can be configured on the first clipping module 11. For example, when the power ratio between carriers is 1:2, the corresponding weighting coefficient of clipping noise can be configured to be 1:2, and when the power ratio between carriers is 1:1, the corresponding weighting coefficient of clipping noise can be configured to be 1:1. In this way, when the first clipping module 11 receives an input signal, if it is determined based on the instantaneous information of the input signal that the power ratio between carriers of the input signal is 1:2, the first clipping module 11 can use the clipping noise weighting coefficient of 1:2 to perform the third clipping processing on the input signal. That is, the distribution ratio of clipping noise between carriers during clipping is 1:2, as shown in FIG. Figure 4 As shown in FIG, when the power ratio between carriers is 1:2, during clipping, the clipping noise corresponding to the low-power input signal is low (1), and the clipping noise corresponding to the high-power input signal is high (2). If the power ratio between carriers of the input signal is determined to be 1:1 based on the instantaneous information of the input signal, the third clipping processing can be performed on the input signal using a weighted coefficient of clipping noise of 1:1. That is, the distribution ratio of clipping noise between carriers during clipping is 1:1, as shown in FIG. Figure 4 As shown in the figure, when the power ratio between carriers is 1:1, the clipping noise of the carriers is also in a 1:1 relationship during clipping, that is, the clipping noise allocated to the two carriers is the same. Figure 4The first clipping module 11 shown is only some examples of the present application and does not limit the present application in any way. The corresponding clipping parameters can also be set according to other power ratios between carriers (for example, 1:5, 1:10, etc.), and the corresponding clipping parameters can also be configured according to the statistical characteristics of other instantaneous information between carriers. For example, the corresponding clipping parameters can be configured according to the statistical characteristics of instantaneous information such as the modulation mode and spectrum occupancy between carriers.

[0134] According to the PAPR suppression device of the above-described embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the first clipping module 11 implements adaptive weighted distribution of clipping noise. Compared to the simple clipping parameter configuration in related technologies (typical scenarios), the above-described embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared to the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0135] In addition, according to the PAPR suppression device of the above embodiment of the present application, the clipping noise can be adaptively distributed according to the power ratio between carriers, which can better distribute the clipping noise and ensure system performance.

[0136] In another embodiment provided by the present invention, a second clipping module can be deployed in the communication device, or the second clipping module already deployed in the communication device determines whether to start clipping based on the carrier parameters and input conditions of the input signal, and does not bypass the signal. In this implementation, the second clipping module can output a signal to be clipped that meets the input conditions of the first clipping module to the first clipping module, and the first clipping module performs a first clipping process on the signal to be clipped to obtain a first clipping signal. The second clipping module is configured to perform a second clipping process on the input signal based on the carrier parameters and the input conditions of the input signal when the carrier parameters of the input signal do not meet the input conditions of the first clipping module, and output the input signal as the signal to be clipped to the first clipping module when the carrier parameters of the input signal meet the input conditions of the first clipping module.

[0137] That is, when the carrier parameters of the input signal do not meet the input conditions of the first clipping module 11, the second clipping module 12 performs a second clipping process on the input signal based on the carrier parameters and input conditions of the input signal to obtain a signal to be clipped, and the carrier parameters of the signal to be clipped can meet the input conditions of the first clipping module. Then, the first clipping module 11 performs a first clipping process on the signal to be clipped to obtain a first clipped signal.

[0138] According to the PAPR suppression device of the above embodiment of the present application, the adaptive clipping process is achieved through the cooperation between the two clipping modules. The implementation is simple and can adapt to more application scenarios.

[0139] The PAPR suppression device of this embodiment may also include multiple different implementations. For example, the first clipping module 11 may be an adaptive clipping module or a non-adaptive clipping module, and the second clipping module 12 may be an adaptive clipping module.

[0140] The second clipping module 12 is adaptively turned on, and the first clipping module 11 performs static clipping.

[0141] In this embodiment, the input condition of the first clipping module can be a static first inter-carrier statistical feature, and the second clipping module is used to perform a second clipping process on the input signal according to the carrier parameters of the input signal and the first inter-carrier statistical feature when the carrier parameters of the input signal do not meet the first inter-carrier statistical feature, so as to obtain the signal to be clipped, and the carrier parameters of the signal to be clipped meet the first inter-carrier statistical feature; the first clipping module is used to perform a first clipping process on the signal to be clipped according to the clipping parameters corresponding to the first inter-carrier statistical feature, so as to obtain the first clipping signal.

[0142] The first inter-carrier statistical feature may be a long-term statistical feature between carriers of a signal. In the first clipping module 11, a corresponding static clipping parameter may be configured based on the first inter-carrier statistical feature. After configuration, the first inter-carrier statistical feature and the corresponding static clipping parameter are no longer updated. Therefore, the first inter-carrier statistical feature is static, and the clipping parameter corresponding to the first inter-carrier statistical feature is a static clipping parameter. In this way, the first clipping module 11 may search for the corresponding static clipping parameter based on the carrier parameter of the input signal, and perform the first clipping processing on the input signal based on the found static clipping parameter.

[0143] In this embodiment, the second clipping module 12 is responsible for performing a second clipping process on an input signal whose carrier parameters do not satisfy the first inter-carrier statistical characteristic, thereby obtaining a signal to be clipped that satisfies the first inter-carrier statistical characteristic. In this way, the signal to be clipped input to the first clipping module 11 satisfies the input condition of the first clipping module 11 (the first inter-carrier statistical characteristic), and the first clipping module 11 can perform the first clipping process on the first clipping signal according to the clipping parameter corresponding to the first inter-carrier statistical characteristic.

[0144] In order to obtain a signal to be clipped that satisfies the first inter-carrier statistical characteristic, the second clipping module 12 can perform a second clipping process on the input signal based on the carrier parameter of the input signal and the first inter-carrier statistical characteristic. For example, the second clipping module 12 can perform the second clipping process based on the difference between the carrier parameter of the input signal and the first inter-carrier statistical characteristic. Taking the first inter-carrier statistical characteristic as the inter-carrier power ratio as an example, assuming that the clipping parameters on the first clipping module 11 are configured based on an inter-carrier power ratio of 1:1, when the inter-carrier power ratio of the input signal input to the first clipping module 11 satisfies 1:1, the input signal can be subjected to the first clipping process based on the configured clipping parameters. When the inter-carrier power ratio of the input signal input to the second clipping module 12 does not satisfy 1:1, the second clipping module 12 can perform a second clipping process on the input signal to pre-clip a portion of the peak of the high-power carrier, so that the signal to be clipped that enters the first clipping module after the second clipping process will not be missed even if the first clipping process is performed using the clipping noise weighting coefficient configured when the inter-carrier power ratio is 1:1.

[0145] Figure 5 FIG. 1 is a block diagram of a PAPR suppression device according to an embodiment of the present application. Figure 5 In the example shown, the static clipping parameter configured on the first clipping module 11 when the power ratio between carriers is 1:1 is: a weighted coefficient of clipping noise of 1:1. The first clipping module 11 is in an on state. When the carrier parameter (power ratio between carriers) of the input signal is different from the first inter-carrier statistical feature, that is, the power ratio between carriers of the input signal does not meet the first inter-carrier statistical feature (power ratio between carriers of 1:1), the second clipping module 12 can perform a second clipping process on the input signal, eliminating part of the peak value of the high-power carrier in advance, so that the signal to be clipped that enters the first clipping module 11 after the second clipping process will not be missed even if the first clipping process is performed using the clipping noise weighted coefficient configured when the power ratio between carriers is 1:1.

[0146] like Figure 5 As shown, an example is shown in which the carrier parameters of two input signals do not satisfy the first inter-carrier statistical feature. Taking the first inter-carrier statistical feature as the inter-carrier power ratio as an example, Figure 5In the scenario 2, carrier 2 lends its own power to carrier 1, causing the power within the bandwidth of carrier 1 to increase, resulting in a deviation between the power ratio between carrier 1 and carrier 2 and 1:1. The first clipping module 11 will have missed clipping. At this time, the second clipping module 12 is turned on to clip carrier 1, eliminating part of the peak value in advance, ensuring that the signal to be clipped sent to the first clipping module 11 meets the peak distribution characteristics, ensuring that the first clipping module 11 has no missed clipping; because carrier 2 is the power lender, the peak-to-average ratio is not a problem for the power amplifier, so the second clipping module 12 does not clip carrier 2 and directly sends it to the first clipping module 11. In other words, Figure 5 In the illustrated scenario 2, the second clipping module 12 clips part of the power of carrier 1 so that the peak-to-average power ratio of carrier 1 and carrier 2 meets 1:1, and then the power is sent to the first clipping module 11.

[0147] Taking the first inter-carrier statistical feature as power spectrum density as an example, Figure 5 In the scenario 1 shown, within carrier 1, the power of part of the bandwidth (dashed line 5M) is lent to another bandwidth (narrow solid line 5M), resulting in Figure 5 As the power increases within the narrow solid line bandwidth shown, the first clipping module 11 may miss clipping. At this time, the second clipping module 12 is turned on to clip the carrier 1, canceling some peaks in advance to ensure that the signal sent to the first clipping module 11 meets the peak distribution characteristics and that there is no missed clipping in the clipping module 1. Since there is no power borrowed for carrier 2, the second clipping module 12 does not clip carrier 2 and directly sends it to the first clipping module 11.

[0148] According to the PAPR suppression device of the above-mentioned embodiment of the present application, the second clipping module 12 adaptively starts clipping processing according to the relationship between the statistical characteristics of the input signal and the first carrier, and clips the input signal. This process can adapt to the PAPR control of any scenario signal, and the implementation method is simple.

[0149] The second clipping module 12 is adaptively turned on, and the first clipping module 11 performs adaptive clipping.

[0150] In this embodiment, the input condition of the first clipping module is a dynamic second carrier statistical feature, wherein the first clipping module is further configured to periodically update the second carrier statistical feature and a clipping parameter corresponding to the second carrier statistical feature.

[0151] The second clipping module is configured to perform second clipping processing on the input signal according to the carrier parameter of the input signal and the second inter-carrier statistical characteristic when the carrier parameter of the input signal does not satisfy the second inter-carrier statistical characteristic, so as to obtain the to-be-clipped signal, and the carrier parameter of the to-be-clipped signal satisfies the second inter-carrier statistical characteristic; and the first clipping module is configured to perform first clipping processing on the to-be-clipped signal according to the clipping parameter corresponding to the second inter-carrier statistical characteristic, so as to obtain the first-clipped signal.

[0152] The second inter-carrier statistical characteristic can be a short-term inter-carrier statistical characteristic obtained periodically. The first clipping module 11 can configure the corresponding clipping parameter according to the new second inter-carrier statistical characteristic obtained in each period, that is, periodically update the configured clipping parameter according to the period. The length of each period can be determined according to the specific application scenario, which is not limited in the present application. Therefore, the first clipping module 11 can also perform adaptive clipping processing on the input signal as time changes.

[0153] The processing process of the input signal by the second clipping module 12 is the same as that in the previous embodiment, except that the second inter-carrier statistical characteristic also changes with time when judging whether the carrier parameter of the input signal satisfies the second inter-carrier statistical characteristic. The second inter-carrier statistical characteristic referred to by the second clipping module 12 when performing second clipping processing on the input signal also changes periodically with time.

[0154] Figure 6 A block diagram of a PAPR suppression device according to an embodiment of the present application is shown. In Figure 6 In the example shown, the clipping parameter configured on the first clipping module 11 according to the inter-carrier power ratio of 1:1 or 1:2 is that the weighting coefficient of the clipping noise is 1:1 or 1:2. The first clipping module 11 is in an open state. When the carrier parameter of the input signal is different from the second inter-carrier statistical characteristic, that is, the inter-carrier power ratio of the input signal is not any one of the second inter-carrier statistical characteristics that have been configured, the second clipping module 12 can perform second clipping processing on the input signal to obtain a to-be-clipped signal satisfying the second inter-carrier statistical characteristic, and output the to-be-clipped signal to the first clipping module 11. The second inter-carrier power configuration 1:1, 1:2 and the corresponding weighting coefficient 1:1 or 1:2 of the clipping noise configured on the first clipping module 11 can be updated according to the statistical characteristic of the new period and the corresponding clipping parameter.

[0155] According to the PAPR suppression device of the above-described embodiment of the present application, the second clipping module 12 adaptively initiates clipping processing based on the relationship between the input signal and the second inter-carrier statistical feature, and performs clipping processing on the input signal. The first clipping module 11 periodically calculates the inter-carrier characteristics of the input signal and updates the locally configured second inter-carrier statistical feature and corresponding clipping parameters based on the calculated inter-carrier characteristics, thereby also achieving adaptive clipping processing. The cooperation of these two modules capable of adaptive clipping processing can adapt to PAPR control of signals in any scenario, and the implementation is simple.

[0156] The present application also provides a PAPR suppression method, which is applied to a communication device. In one possible implementation, the communication device may include: a first clipping module and a second clipping module, wherein the input end of the second clipping module is used to receive an input signal, and the output end of the second clipping module is connected to the input end of the first clipping module.

[0157] This application also provides a communication device, Figure 7 FIG. 1 shows a block diagram of a communication device according to an embodiment of the present application. Figure 7 The communication device may be a base station. In a possible implementation, Figure 7 The communication device shown may include a baseband unit and a radio frequency unit, wherein the baseband unit may include a BBU and the radio frequency unit may include an RRU+antenna and / or an AAU.

[0158] In one possible implementation, the PAPR suppression device of the above embodiment of the present application may be provided in the RRU or AAU. In another possible implementation, the first clipping module may be located in the RRU or AAU, and the second clipping module may be located in the BBU.

[0159] The communication device may further include one or more processors and one or more memories, the memory may store executable instructions corresponding to the PAPR suppression method provided in the present application, and the processor may be configured to implement the PAPR suppression method provided in the present application when executing the executable instructions stored in the memory.

[0160] Figure 7 The connection relationship between the processor and memory and the baseband unit and the radio frequency unit is only an example of the present application and does not limit the present application in any way. For example, the processor and memory can also be set in the BBU, RRU, and AAU respectively, that is, the processor and memory are respectively set in the BBU, RRU, and AAU.

[0161] The processor can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0162] The memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, and may also include non-volatile memory, such as flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); the memory may also include a combination of the above types of memory. The memory may also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these. The memory may exist independently and be connected to the processor via a communication line. The memory may also be integrated with the processor. The memory provided in the embodiments of the present application may generally be non-volatile. The memory is used to store computer-executable instructions for executing the solutions of the present application, and the execution is controlled by a processor. The processor is used to execute the computer-executable instructions stored in the memory, thereby implementing the methods provided in the embodiments of the present application.

[0163] Figure 8 FIG. 5 is a flow chart showing a PAPR suppression method according to an embodiment of the present application. Figure 8 As shown, the method may include the following steps:

[0164] Step S701: The communication device controls the second clipping module to output a signal to be clipped that meets an input condition of the first clipping module to the first clipping module, where the input condition includes a peak distribution characteristic of the input signal.

[0165] Step S702: The communication device uses the first clipping module to perform a first clipping process on the signal to be clipped to obtain a first clipping signal.

[0166] In one possible implementation, the communication device can determine whether to start the second clipping module to perform the second clipping processing on the input signal based on whether the carrier parameters of the input signal meet the input conditions of the first clipping module; wherein the input conditions include the peak distribution characteristics of the input signal.

[0167] Figure 9 FIG. 5 is a flow chart showing a PAPR suppression method according to an embodiment of the present application. Figure 9 As shown, in one possible implementation,

[0168] Step S701, the communication device controls the second clipping module to output a signal to be clipped that meets an input condition of the first clipping module to the first clipping module, which may include:

[0169] Step S7011: When the carrier parameters of the input signal do not meet the input conditions of the first clipping module, the second clipping module 12 of the communication device performs a second clipping process on the input signal according to the carrier parameters and input conditions of the input signal to obtain the signal to be clipped;

[0170] Step S7012: When the carrier parameters of the input signal meet the input conditions of the first clipping module, the second clipping module 12 of the communication device outputs the input signal as a signal to be clipped to the first clipping module 11.

[0171] That is, when the carrier parameters of the input signal do not meet the input conditions of the first clipping module 11, the communication device uses the second clipping module 12 to perform a second clipping process on the input signal based on the carrier parameters and input conditions of the input signal, thereby obtaining a signal to be clipped. The carrier parameters of the signal to be clipped can meet the input conditions of the first clipping module. Then, the first clipping module 11 performs a first clipping process on the signal to be clipped, thereby obtaining a first clipped signal. When the carrier parameters of the input signal meet the input conditions of the first clipping module 11, the communication device uses the second clipping module 12 to directly output the input signal as the signal to be clipped to the first clipping module 11. Then, the first clipping module 11 performs a first clipping process on the signal to be clipped, thereby obtaining a first clipped signal.

[0172] According to the PAPR suppression method of the above embodiment of the present application, the adaptive clipping process is achieved through the cooperation between the two clipping modules. The implementation is simple and can adapt to more application scenarios.

[0173] Combine Figure 2 In the PAPR suppression apparatus shown, the communication device can determine whether to start the second clipping processing of the input signal by the second clipping module 12 according to whether the carrier parameters of the input signal meet the input conditions of the first clipping module 11.

[0174] In one possible implementation, the communication device controlling the second clipping module to output a signal to be clipped that meets the input conditions of the first clipping module to the first clipping module may include: the communication device not enabling the second clipping module when the carrier parameters of the input signal meet the input conditions of the first clipping module. When the carrier parameters of the input signal meet the input conditions of the first clipping module 11, the communication device may not enable the second clipping module 12 to perform clipping on the input signal, or in other words, disable the clipping process on the input signal. That is, when the carrier parameters of the input signal meet the input conditions of the first clipping module 11, the second clipping module 12 in the communication device outputs the input signal as the signal to be clipped to the first clipping module 11.

[0175] For input signals that meet input conditions, the communication device uses the first clipping module 11 to perform a first clipping process on the input signal. The input conditions include the peak distribution characteristics of the input signal. The peak distribution characteristics of the input signal may include statistical characteristics of the peak distribution of the input signal, such as the statistically obtained power ratio between carriers of the input signal, the modulation method of the carriers, the spectrum occupancy of the carriers, etc. In other words, the communication device can configure corresponding clipping parameters on the first clipping module 11 based on the statistical characteristics of the peak distribution of the input signal. When the carrier parameters of the input signal meet the input conditions, the communication device can perform the first clipping process on the input signal based on the carrier parameters of the input signal and the clipping parameters.

[0176] In one possible implementation, the communication device controls the second clipping module to output a signal to be clipped that meets the input conditions of the first clipping module to the first clipping module. This may also include: when the carrier parameter of the input signal does not meet the input conditions of the first clipping module 11, the communication device controls the second clipping module to perform a second clipping process on the input signal based on the carrier parameter of the input signal and the input conditions to obtain the signal to be clipped. When the carrier parameter of the input signal does not meet the input conditions of the first clipping module 11, the communication device may determine to start the second clipping module 12 to perform a second clipping process on the input signal based on the carrier parameter of the input signal and the input conditions. Specifically, the input signal may be subjected to a second clipping process based on the difference between the carrier parameter of the input signal and the input conditions to obtain the signal to be clipped, and the carrier parameter of the signal to be clipped meets the input conditions. The first clipping module 11 then performs a first clipping process on the signal to be clipped based on the clipping parameters corresponding to the input conditions to obtain the first clipped signal.

[0177] According to the PAPR suppression method provided in the embodiments of this application, PAPR suppression is achieved through the cooperation of two-stage clipping modules. Compared to the simple configuration of clipping parameters in related technologies (typical scenarios), the above-mentioned embodiments of this application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared to the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in this application is simpler to implement, solving the technical problems of the static clipping algorithm in related technologies that are too complex or have limited application scenarios.

[0178] In a possible implementation, the method further includes:

[0179] When the communication device controls the second clipping module to operate in bypass mode, the received input signal is output to the input end of the first clipping module; the communication device uses the first clipping module to perform a third clipping process on the input signal according to the clipping parameters corresponding to the carrier parameters of the input signal; wherein the clipping parameters are configured for different carriers based on the statistical characteristics of the peak distribution of the input signal.

[0180] Combine Figure 4 In the PAPR suppression device shown in FIG. 1 , in this embodiment, the communication device can set the input condition of the first clipping module 11 to be relatively wide, so that all input signals can meet the input condition. In this way, the communication device can control the second clipping module 12 to work in the bypass mode, without performing any processing on the input signal, and output the received input signal to the first clipping module 11. Figure 4 As shown, the second clipping module 12 is represented by a dotted box and operates in a bypass mode.

[0181] As can be seen from the above, the first clipping module 11 can be configured with corresponding clipping parameters based on the statistical characteristics of the peak distribution of the input signal. The statistical characteristics of the peak distribution can be carrier characteristics, such as the power configuration between carriers, the modulation method of the carriers, and the spectrum occupancy of the carriers. In one possible implementation, different clipping parameters can be configured for different carriers based on the statistical characteristics of the peak distribution of the input signal. In this way, the first clipping module 11 can adaptively adjust the weighting coefficient of the clipping noise based on the carrier parameters of the input signal and the clipping parameters configured based on the carrier characteristics, and perform clipping processing on the input signal based on the weighting coefficient of the clipping noise.

[0182] In one possible implementation, the carrier parameter may be a power ratio between carriers, the clipping parameter may be a clipping noise weighting coefficient, and the communication device uses the first clipping module to perform clipping processing on the input signal according to the clipping parameter corresponding to the carrier parameter of the input signal, including: the communication device uses the first clipping module to perform clipping processing on the input signal according to the clipping noise weighting coefficient corresponding to the power ratio between carriers.

[0183] According to the PAPR suppression method of the above-described embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the first clipping module 11 implements adaptive weighted distribution of clipping noise. Compared to the simple clipping parameter configuration in related technologies (typical scenarios), the above-described embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared to the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0184] In addition, according to the PAPR suppression device of the above embodiment of the present application, the clipping noise can be adaptively distributed according to the power ratio between carriers, which can better distribute the clipping noise and ensure system performance.

[0185] Figure 8 and Figure 9 The PAPR suppression device of the embodiment shown may also include a variety of different implementations. For example, the first clipping module 11 may be an adaptive clipping module or a non-adaptive clipping module, and the second clipping module 12 may be an adaptive clipping module.

[0186] In one possible implementation, the input condition of the first clipping module is a static first inter-carrier statistical feature, and the method further includes: the communication device configuring a clipping parameter corresponding to the first inter-carrier statistical feature in the first clipping module according to the first inter-carrier statistical feature.

[0187] The first inter-carrier statistical feature may be a long-term statistical feature between carriers of a signal. The communication device may configure corresponding static clipping parameters in the first clipping module 11 based on the first inter-carrier statistical feature, and the parameters are no longer updated after configuration. In this way, the communication device may search for corresponding static clipping parameters based on the carrier parameters of the input signal, and use the first clipping module 11 to clip the input signal based on the searched static clipping parameters.

[0188] In this embodiment, step S7011, when the carrier parameter of the input signal does not meet the input condition of the first clipping module, the second clipping module 12 of the communication device performs a second clipping process on the input signal according to the carrier parameter and input condition of the input signal to obtain the signal to be clipped, may include:

[0189] When the carrier parameters of the input signal do not satisfy the first inter-carrier statistical characteristics, the second clipping module of the communication device performs a second clipping process on the input signal according to the carrier parameters of the input signal and the first inter-carrier statistical characteristics to obtain the signal to be clipped, and the carrier parameters of the signal to be clipped satisfy the first inter-carrier statistical characteristics.

[0190] Step S702, the communication device uses the first clipping module to perform a first clipping process on the signal to be clipped to obtain a first clipping signal, which may include:

[0191] The communication device uses the first clipping module to perform a first clipping process on the signal to be clipped according to a clipping parameter corresponding to a first inter-carrier statistical feature to obtain the first clipping signal.

[0192] Combine Figure 5 In the PAPR suppression device shown in this embodiment, the communication device uses a second clipping module 12 to perform a second clipping process on input signals whose carrier parameters do not meet the first inter-carrier statistical characteristics, preemptively clipping a portion of the high-power carrier peak. Thus, the signal to be clipped, input to the first clipping module 11, meets the input conditions of the first clipping module 11 (the first inter-carrier statistical characteristics). The communication device can perform the first clipping process on the signal to be clipped using the clipping parameters configured by the first clipping module based on the first inter-carrier statistical characteristics, without causing missed clipping.

[0193] According to the PAPR suppression method of the above-mentioned embodiment of the present application, the second clipping module 12 adaptively starts clipping processing according to the relationship between the statistical characteristics of the input signal and the first carrier, and clips the input signal. This process can adapt to the PAPR control of any scenario signal, and the implementation method is simple.

[0194] In another possible implementation, the input condition of the first clipping module is a dynamic second carrier statistical feature, and the method further includes: the communication device periodically obtains new second carrier statistical features, and configures clipping parameters corresponding to the second carrier statistical features in the first clipping module according to the new second carrier statistical features.

[0195] The second inter-carrier statistical feature may be a short-term inter-carrier statistical feature obtained through periodic statistics. The communication device may configure corresponding clipping parameters on the first clipping module 11 based on the new second inter-carrier statistical feature obtained through statistics in each period. That is, the configured clipping parameters may be periodically updated based on the statistical period. The length of each period may be determined based on the specific application scenario and is not limited in this application. Therefore, as time changes, the first clipping module 11 may also perform adaptive clipping processing on the input signal.

[0196] In this embodiment, step S7011, when the carrier parameter of the input signal does not meet the input condition of the first clipping module, the second clipping module 12 of the communication device performs a second clipping process on the input signal according to the carrier parameter and input condition of the input signal to obtain the signal to be clipped, may include:

[0197] When the carrier parameters of the input signal do not satisfy the second inter-carrier statistical characteristics, the second clipping module 12 of the communication device performs a second clipping process on the input signal according to the carrier parameters of the input signal and the second inter-carrier statistical characteristics to obtain the signal to be clipped, and the carrier parameters of the signal to be clipped satisfy the second inter-carrier statistical characteristics.

[0198] Step S702, the communication device uses the first clipping module to perform a first clipping process on the signal to be clipped to obtain a first clipping signal, which may include:

[0199] The communication device uses the first clipping module to perform a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the second inter-carrier statistical feature to obtain the first clipping signal.

[0200] Combine Figure 6 In the PAPR suppression device shown in this embodiment, the second clipping module 12 processes the input signal in the same manner as in the previous embodiment, except that the second inter-carrier statistical characteristic also changes over time when determining whether the carrier parameters of the input signal satisfy the second inter-carrier statistical characteristic. The second inter-carrier statistical characteristic, as referenced by the second clipping module 12 when performing the second clipping processing on the input signal, also changes periodically over time.

[0201] According to the PAPR suppression method of the above-described embodiment of the present application, the second clipping module 12 adaptively initiates clipping processing based on the relationship between the input signal and the second inter-carrier statistical feature, and performs clipping processing on the input signal. The first clipping module 11 periodically calculates the inter-carrier features of the input signal and updates the locally configured second inter-carrier statistical features and corresponding clipping parameters based on the calculated inter-carrier features, thereby also achieving adaptive clipping processing. The cooperation of these two modules capable of adaptive clipping processing can adapt to PAPR control of signals in any scenario, and the implementation is simple.

[0202] In one possible implementation, the carrier parameter of the input signal, the first inter-carrier statistical feature, and the second carrier statistical feature are inter-carrier power ratios. The carrier parameter of the input signal, the first inter-carrier statistical feature, and the second carrier statistical feature may also be other carrier characteristics such as a carrier modulation mode and a carrier spectrum occupancy, which are not limited in this application.

[0203] The present application also provides a PAPR suppression method, which is applied to a communication device. The communication device may be the RRU or AAU as described above, or may be Figure 3 or Figure 7 The communication device shown is not limited in this application.

[0204] Figure 10 FIG. 5 is a flow chart showing a PAPR suppression method according to an embodiment of the present application. Figure 10 As shown, the PAPR suppression method of the present application may include:

[0205] In step S100 , the communication device performs a second clipping process on an input signal whose carrier parameters do not meet an input condition to obtain a signal to be clipped, and performs a first clipping process on the signal to be clipped to obtain a first clipping signal.

[0206] The input condition includes a peak distribution characteristic of the input signal, and the carrier parameters of the signal to be clipped meet the input condition.

[0207] As described above, the peak distribution characteristics of the input signal may include statistical characteristics of the peak distribution of the input signal. The peak distribution characteristics of the input signal are primarily affected by factors such as the inter-carrier power ratio, carrier modulation method, and spectrum occupancy of the input signal. The communication device configures clipping parameters based on the statistical characteristics of the peak distribution of the input signal (input conditions). When the carrier parameters of the input signal do not meet the input conditions, the communication device performs a second clipping process on the input signal to obtain a signal to be clipped that meets the input conditions. The communication device then performs a first clipping process based on the clipping parameters corresponding to the input conditions to obtain a first clipped signal.

[0208] The PAPR suppression method of the present application obtains a signal to be clipped that meets the peak distribution characteristics by pre-processing (second clipping processing) the input signal that does not meet the peak distribution characteristics, and then performs the first clipping processing on the signal to be clipped to obtain the first clipping signal. Through the step-by-step processing and two-stage clipping method, compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned implementation method of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters according to statistical characteristics and pre-processing the input signal in the present application is simpler to implement, which solves the technical problems of high complexity or limited application scenarios of static clipping algorithms in related technologies.

[0209] Figure 11 A flowchart of a PAPR suppression method according to an embodiment of the present application is shown. In one possible implementation, the method may include:

[0210] Step S110: the communication device performs a second clipping process on an input signal whose carrier parameters do not meet an input condition to obtain a signal to be clipped, and performs a first clipping process on the signal to be clipped to obtain a first clipping signal;

[0211] In step S111 , the communication device performs a first clipping process on an input signal whose carrier parameters meet an input condition to obtain a first clipping signal.

[0212] The process of step S110 can be found in the above description of step S100 and will not be described in detail.

[0213] Regarding step S111 , when the communication device determines that the carrier parameters of the input signal meet the input conditions, the first clipping process may be directly performed on the input signal to obtain a first clipped signal.

[0214] According to the PAPR suppression method of the above-mentioned embodiment of the present application, different clipping processes are adopted for the input signal according to the relationship between the carrier parameters of the input signal and the input conditions. Compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters according to statistical characteristics and pre-processing the input signal in the present application is simpler to implement, and solves the technical problems in related technologies of excessive complexity of static clipping algorithms or limited application scenarios.

[0215] In one possible implementation, step S100 (S110), in which the communication device performs a second clipping process on an input signal whose carrier parameters do not meet an input condition to obtain a signal to be clipped, may include:

[0216] When the carrier parameter of the input signal does not meet the input condition, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped.

[0217] In a possible implementation, the communication device may perform a second clipping process based on the difference between the carrier parameters of the input signal and the input condition. Figure 5 In the example shown, assuming that clipping parameters are configured based on an inter-carrier power ratio of 1:1, when the inter-carrier power ratio of the input signal satisfies 1:1, the input signal can be subjected to a first clipping process based on the configured clipping parameters. If the inter-carrier power ratio of the input signal does not satisfy 1:1, the communications device can perform a second clipping process on the input signal, pre-clipping a portion of the peak of the high-power carrier. This allows the signal to enter the to-be-clipped state after the second clipping process. Even if the first clipping process is performed using the clipping noise weighting coefficient configured when the inter-carrier power ratio is 1:1, no missed clipping occurs.

[0218] According to the PAPR suppression method of the above embodiment of the present application, by adaptively starting the second clipping processing according to the relationship between the input signal and the input condition, and performing the second clipping processing on the input signal, it can adapt to the PAPR control of any scene signal, and the implementation method is simple.

[0219] Figure 12 A flowchart of a PAPR suppression method according to an embodiment of the present application is shown.

[0220] In a possible implementation, the input condition is a static first inter-carrier statistical feature. Step S100 (S110) may include:

[0221] Step S121: When the carrier parameters of the input signal do not satisfy the first inter-carrier statistical characteristics, the communication device performs a second clipping process on the input signal according to the carrier parameters of the input signal and the first inter-carrier statistical characteristics to obtain the signal to be clipped, and the carrier parameters of the signal to be clipped satisfy the first inter-carrier statistical characteristics.

[0222] In this embodiment, step S111, the communication device performs a first clipping process on the signal to be clipped to obtain a first clipping signal, which may include:

[0223] Step S122: The communication device performs a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the first inter-carrier statistical feature to obtain the first clipping signal.

[0224] In one possible implementation, Figure 12 As shown, the method may further include:

[0225] Step S120: The communication device configures a clipping parameter corresponding to the first inter-carrier statistical feature according to the first inter-carrier statistical feature.

[0226] As described above, the first inter-carrier statistical feature may be a long-term statistical feature between carriers of a signal. The communication device may configure a corresponding static clipping parameter based on the first inter-carrier statistical feature. After configuration, the first inter-carrier statistical feature and the corresponding static clipping parameter are no longer updated. In this way, the communication device can search for the corresponding static clipping parameter based on the carrier parameters of the input signal and perform the first clipping processing on the input signal based on the searched static clipping parameter.

[0227] When the carrier parameter of the input signal does not satisfy the first inter-carrier statistical feature, the communication device may further perform a second clipping process on the input signal based on the carrier parameter of the input signal and the first inter-carrier statistical feature to obtain the signal to be clipped, where the carrier parameter of the signal to be clipped satisfies the first inter-carrier statistical feature. Then, the communication device may further perform a first clipping process on the signal to be clipped based on the clipping parameter corresponding to the first inter-carrier statistical feature to obtain the first clipped signal.

[0228] According to the PAPR suppression method of the above-mentioned embodiment of the present application, by adaptively starting the clipping process according to the relationship between the statistical characteristics of the input signal and the first carrier, and performing the clipping process on the input signal, it can adapt to the PAPR control of any scenario signal, and the implementation method is simple.

[0229] Figure 13 A flowchart of a PAPR suppression method according to an embodiment of the present application is shown.

[0230] In a possible implementation, the input condition is a dynamic statistical feature of the second carrier. Figure 13 As shown, the method may include:

[0231] Step S130: The communication device periodically obtains new second carrier statistical characteristics, and configures clipping parameters corresponding to the new second carrier statistical characteristics according to the new second carrier statistical characteristics.

[0232] Step S100 (S110) may include:

[0233] Step S131: When the carrier parameter of the input signal does not satisfy the second inter-carrier statistical feature, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the second inter-carrier statistical feature to obtain the signal to be clipped, where the carrier parameter of the signal to be clipped satisfies the second inter-carrier statistical feature.

[0234] Step S111, the communication device performs a first clipping process on the signal to be clipped to obtain a first clipping signal, which may include:

[0235] Step S132: The communication device performs a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the second inter-carrier statistical feature to obtain the first clipping signal.

[0236] As described above, the second inter-carrier statistical feature may be a short-term inter-carrier statistical feature obtained through periodic statistics. The communication device may configure corresponding clipping parameters based on the new second inter-carrier statistical feature obtained through statistics in each period, that is, periodically update the configured clipping parameters based on the statistical period. The length of each period may be determined based on the specific application scenario, and this application does not impose any restrictions on this. Therefore, the first clipping process may also be a process of adaptively clipping the input signal over time.

[0237] The specific process of the second clipping process in step S131 is the same as the process described above, except that the second inter-carrier statistical characteristic also changes over time when determining whether the carrier parameters of the input signal meet the second inter-carrier statistical characteristic. When performing the second clipping process on the input signal, the second inter-carrier statistical characteristic used as a reference also changes periodically over time.

[0238] According to the PAPR suppression method of the above-described embodiment of the present application, adaptive first clipping can also be achieved by adaptively enabling the second clipping process based on the relationship between the input signal and the second inter-carrier statistical feature, and performing the second clipping process on the input signal. The inter-carrier features of the input signal are periodically counted, and the locally configured second inter-carrier statistical feature and corresponding clipping parameters are updated based on the counted inter-carrier features. The coordination of these two adaptive clipping processes can adapt to PAPR control of signals in any scenario, and the implementation is simple.

[0239] In one possible implementation, the method includes:

[0240] The communication device performs a third clipping process on the input signal based on a clipping parameter corresponding to a carrier parameter of the input signal, wherein the clipping parameter is configured for different carriers based on statistical characteristics of a peak distribution of the input signal. The carrier parameter is a power ratio between carriers, and the clipping parameter is a weighting coefficient of clipping noise.

[0241] As can be seen from the foregoing, corresponding clipping parameters can be configured based on the statistical characteristics of the peak distribution of the statistically analyzed input signal. The statistical characteristics of the peak distribution can be carrier characteristics, such as inter-carrier power configuration, carrier modulation mode, and carrier spectrum occupancy. In one possible implementation, different clipping parameters can be configured for different carriers based on the statistical characteristics of the peak distribution of the input signal. In this way, the communication device can adaptively adjust the weighting coefficient of the clipping noise based on the carrier parameters of the input signal and the clipping parameters configured based on the carrier characteristics, and perform clipping processing on the input signal based on the weighting coefficient of the clipping noise.

[0242] According to the PAPR suppression method of the above-mentioned embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the communication device can achieve adaptive weighted distribution of clipping noise. Compared with the simple clipping parameter configuration in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0243] An embodiment of the present application further provides an adaptive peak-to-average ratio (PAPR) suppression device, which is applied to a communication device. Figure 14 FIG. 1 is a block diagram of a PAPR suppression device according to an embodiment of the present application. Figure 14 As shown, the device may include:

[0244] The clipping unit 1400 is used to perform a second clipping process on an input signal whose carrier parameters do not meet the input conditions to obtain a signal to be clipped, and to perform a first clipping process on the signal to be clipped to obtain a first clipping signal; wherein the input conditions include the peak distribution characteristics of the input signal, and the carrier parameters of the signal to be clipped meet the input conditions.

[0245] The PAPR suppression device of the present application performs pre-processing (second clipping processing) on ​​an input signal that does not meet the peak distribution characteristics to obtain a signal to be clipped that meets the peak distribution characteristics, and then performs a first clipping processing on the signal to be clipped to obtain a first clipping signal. Through step-by-step processing and two-stage clipping, compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned implementation method of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters according to statistical characteristics and pre-processing the input signal in the present application is simpler to implement, solving the technical problems of high complexity or limited application scenarios of static clipping algorithms in related technologies.

[0246] In one possible implementation, the clipping unit 1400 includes: a second clipping module, configured to perform a second clipping process on the input signal according to the carrier parameters of the input signal and the input condition when the carrier parameters of the input signal do not meet the input condition, to obtain the signal to be clipped.

[0247] In a possible implementation, the apparatus further includes: a first clipping module, configured to perform a first clipping process on an input signal whose carrier parameters meet an input condition, to obtain a first clipped signal.

[0248] According to the PAPR suppression device of the above-mentioned embodiment of the present application, different clipping processes are adopted for the input signal according to the relationship between the carrier parameters of the input signal and the input conditions. Compared with the configuration of simple clipping parameters in related technologies (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensure no missed clipping, controllable PAPR, and protect the power amplifier; compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters according to statistical characteristics and pre-processing the input signal in the present application is simpler to implement, and solves the technical problems in related technologies of high complexity of static clipping algorithms or limited application scenarios.

[0249] In one possible implementation, the device also includes: a third clipping module, used to perform a third clipping process on the input signal according to the clipping parameters corresponding to the carrier parameters of the input signal; wherein the clipping parameters are configured for different carriers based on the statistical characteristics of the peak distribution of the input signal.

[0250] In a possible implementation, the carrier parameter is a power ratio between carriers, and the clipping parameter is a weighting coefficient of clipping noise.

[0251] According to the PAPR suppression device of the above-mentioned embodiment of the present application, by configuring different clipping parameters for different carriers based on the statistical characteristics of the peak distribution of the input signal, the communication device can achieve adaptive weighted distribution of clipping noise. Compared with the simple clipping parameter configuration in the related art (typical scenarios), the above-mentioned embodiment of the present application can adapt to multiple scenarios, ensuring no missed clipping, controllable PAPR, and protecting the power amplifier. Compared with the method of extracting each peak and performing clipping processing in harsh scenarios, the method of pre-configuring clipping parameters based on statistical characteristics in the present application is simpler to implement.

[0252] In one possible implementation, the input condition is a static first inter-carrier statistical feature, and the second clipping module is further used to perform a second clipping process on the input signal according to the carrier parameters of the input signal and the first inter-carrier statistical feature when the carrier parameters of the input signal do not meet the first inter-carrier statistical feature to obtain the signal to be clipped; the first clipping module is further used to perform a first clipping process on the signal to be clipped according to the clipping parameters corresponding to the first inter-carrier statistical feature to obtain the first clipping signal.

[0253] In a possible implementation manner, the apparatus further includes: a first configuration module, configured to configure a clipping parameter corresponding to the first inter-carrier statistical feature according to the first inter-carrier statistical feature.

[0254] According to the PAPR suppression device of the above-mentioned embodiment of the present application, by adaptively starting the clipping processing according to the relationship between the statistical characteristics of the input signal and the first carrier, and performing the clipping processing on the input signal, it can adapt to the PAPR control of any scenario signal, and the implementation method is simple.

[0255] In one possible implementation, the input condition is a dynamic second carrier statistical feature, and the device also includes: a second configuration module, which is used to periodically obtain new second carrier statistical features and configure the clipping parameters corresponding to the new second carrier statistical features according to the new second carrier statistical features.

[0256] In one possible implementation, the second clipping module is further used to perform a second clipping process on the input signal according to the carrier parameters of the input signal and the second inter-carrier statistical characteristics when the carrier parameters of the input signal do not meet the second inter-carrier statistical characteristics, so as to obtain the signal to be clipped; the first clipping module is further used to perform a first clipping process on the signal to be clipped according to the clipping parameters corresponding to the second inter-carrier statistical characteristics, so as to obtain the first clipping signal.

[0257] According to the PAPR suppression device of the above-described embodiment of the present application, adaptive first clipping can also be achieved by adaptively enabling the second clipping process based on the relationship between the input signal and the second inter-carrier statistical feature, and performing the second clipping process on the input signal. The inter-carrier features of the input signal are periodically counted, and the locally configured second inter-carrier statistical feature and corresponding clipping parameters are updated based on the counted inter-carrier features. The coordination of these two adaptive clipping processes allows for PAPR control in any signal scenario, and is simple to implement.

[0258] In a possible implementation, the carrier parameter, the first inter-carrier statistical feature, and the second carrier statistical feature of the input signal are inter-carrier power ratios.

[0259] An embodiment of the present application provides a PAPR suppression device, comprising: a processor and a memory for storing processor-executable instructions; wherein the processor is configured to implement the above method when executing the instructions.

[0260] An embodiment of the present application provides a non-volatile computer-readable storage medium having computer program instructions stored thereon, wherein the computer program instructions implement the above method when executed by a processor.

[0261] An embodiment of the present application provides a computer program product, including a computer-readable code, or a non-volatile computer-readable storage medium carrying the computer-readable code. When the computer-readable code runs in a processor of an electronic device, the processor in the electronic device executes the above method.

[0262] A computer-readable storage medium may be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination thereof.

[0263] The computer-readable program instructions or codes described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions to be stored in the computer-readable storage medium in each computing / processing device.

[0264] The computer program instructions for performing the operations of the present application may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, by utilizing the state information of computer-readable program instructions to personalize an electronic circuit, such as a programmable logic circuit, a field-programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer-readable program instructions, thereby implementing various aspects of the present application.

[0265] Various aspects of the present application are described herein with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer-readable program instructions.

[0266] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device is generated that implements the functions / actions specified in one or more blocks in the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium, where these instructions cause the computer, programmable data processing device, and / or other device to operate in a specific manner. Thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing various aspects of the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0267] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0268] The flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, systems, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a part for a module, program segment or instruction, and the part for the module, program segment or instruction comprises one or more executable instructions for realizing the logical function of the specification. In some alternative implementations, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous boxes can actually be performed substantially in parallel, and they can sometimes also be performed in the opposite order, depending on the function involved.

[0269] It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented by hardware that performs the corresponding function or action (such as a circuit or ASIC (Application Specific Integrated Circuit)), or can be implemented by a combination of hardware and software, such as firmware.

[0270] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art can understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0271] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. An adaptive peak-to-average ratio (PAPR) suppression device, characterized in that: The device comprises: a first clipping module and a second clipping module, The second clipping module outputs a signal to be clipped that meets an input condition of the first clipping module to the first clipping module, wherein the input condition includes a peak distribution characteristic of the input signal; The first clipping module performs a first clipping process on the signal to be clipped to obtain a first clipping signal; In the bypass mode, the second clipping module is further configured to obtain the input signal and output the input signal to the first clipping module; the first clipping module is configured to perform a third clipping process on the input signal according to the clipping parameter corresponding to the carrier parameter of the input signal; The clipping parameters are configured for different carriers based on the statistical characteristics of the peak distribution of the input signal.

2. The device according to claim 1, characterized in that The second clipping module is used to obtain an input signal. When the carrier parameters of the input signal do not meet the input conditions of the first clipping module, the second clipping processing is performed on the input signal according to the carrier parameters of the input signal and the input conditions to obtain the signal to be clipped.

3. The device according to claim 1 or 2, characterized in that The second clipping module is used to obtain the input signal, and when the carrier parameters of the input signal meet the input conditions of the first clipping module, output the input signal as a signal to be clipped to the first clipping module.

4. The device according to claim 1, characterized in that The carrier parameter is the power ratio between carriers, and the clipping parameter is the weighting coefficient of the clipping noise.

5. The device according to claim 2, characterized in that The input condition of the first clipping module is a static first inter-carrier statistical feature, The second clipping module is configured to perform a second clipping process on the input signal according to the carrier parameter of the input signal and the first inter-carrier statistical feature to obtain the signal to be clipped when the carrier parameter of the input signal does not satisfy the first inter-carrier statistical feature; The first clipping module is configured to perform a first clipping process on the signal to be clipped according to a clipping parameter corresponding to a first inter-carrier statistical feature to obtain the first clipping signal.

6. The device according to claim 2, characterized in that The input condition of the first clipping module is a dynamic second inter-carrier statistical feature, wherein the first clipping module is used to periodically update the second inter-carrier statistical feature and the clipping parameter corresponding to the second inter-carrier statistical feature, The second clipping module is configured to perform a second clipping process on the input signal according to the carrier parameter of the input signal and the second inter-carrier statistical feature to obtain the signal to be clipped when the carrier parameter of the input signal does not satisfy the second inter-carrier statistical feature; The first clipping module is configured to perform a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the second inter-carrier statistical feature to obtain the first clipping signal.

7. The device according to claim 5 or 6, characterized in that The carrier parameters, the first inter-carrier statistical characteristics, and the second inter-carrier statistical characteristics of the input signal include inter-carrier power ratio.

8. A communication device, characterized in that: The method comprises the adaptive peak-to-average ratio (PAPR) suppression device according to any one of claims 1 to 7.

9. A communication system comprising a baseband unit (BBU) and a remote radio unit (RRU) or an active antenna unit (AAU), wherein: The first clipping module according to any one of claims 1 to 7 is located in an RRU or an AAU, and the second clipping module according to any one of claims 1 to 7 is located in a BBU; Alternatively, as claimed in any one of claims 1 to 7, the first clipping module and the second clipping module are both located in the RRU or the AAU.

10. An adaptive peak-to-average ratio (PAPR) suppression method, characterized in that: The method is applied to a communication device, The method comprises: The communication device performs a second clipping process on an input signal whose carrier parameters do not meet the input conditions to obtain a signal to be clipped, and performs a first clipping process on the signal to be clipped to obtain a first clipping signal; The input condition includes a peak distribution characteristic of the input signal, and the carrier parameters of the signal to be clipped meet the input condition; The method further comprises: The communication device performs a third clipping process on the input signal according to a clipping parameter corresponding to a carrier parameter of the input signal; The clipping parameters are configured for different carriers based on the statistical characteristics of the peak distribution of the input signal; The communication device includes a first clipping module and a second clipping module, the input end of the second clipping module is used to receive an input signal, the output end of the second clipping module is connected to the input end of the first clipping module, the second clipping process is completed by the second clipping module, the first clipping process and the third clipping process are completed by the first clipping module, and when the first clipping module completes the third clipping process, the second clipping module operates in bypass mode.

11. The method according to claim 10, characterized in that The communication device performs a second clipping process on an input signal whose carrier parameters do not meet an input condition to obtain a signal to be clipped, comprising: When the carrier parameter of the input signal does not meet the input condition, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped.

12. The method according to claim 10 or 11, characterized in that The method further comprises: The communication device performs a first clipping process on an input signal whose carrier parameters meet an input condition to obtain a first clipping signal.

13. The method according to claim 10, characterized in that The carrier parameter is the power ratio between carriers, and the clipping parameter is the weighting coefficient of the clipping noise.

14. The method according to claim 11, characterized in that The input condition is a static first inter-carrier statistical feature, The communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped when the carrier parameter of the input signal does not meet the input condition, including: When the carrier parameter of the input signal does not satisfy the first inter-carrier statistical feature, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the first inter-carrier statistical feature to obtain the signal to be clipped; The communication device performs a first clipping process on the signal to be clipped to obtain a first clipping signal, including: The communication device performs a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the first inter-carrier statistical feature to obtain the first clipping signal.

15. The method according to claim 14, characterized in that The method further comprises: The communication device configures a clipping parameter corresponding to the first inter-carrier statistical feature according to the first inter-carrier statistical feature.

16. The method according to claim 11, characterized in that The input condition is a dynamic second inter-carrier statistical feature, and the method further includes: The communication device periodically obtains a new second inter-carrier statistical feature, and configures a clipping parameter corresponding to the new second inter-carrier statistical feature according to the new second inter-carrier statistical feature.

17. The method according to claim 16, characterized in that The communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the input condition to obtain the signal to be clipped when the carrier parameter of the input signal does not meet the input condition, including: When the carrier parameter of the input signal does not satisfy the second inter-carrier statistical feature, the communication device performs a second clipping process on the input signal according to the carrier parameter of the input signal and the second inter-carrier statistical feature to obtain the signal to be clipped; The communication device performs a first clipping process on the signal to be clipped to obtain a first clipping signal, including: The communication device performs a first clipping process on the signal to be clipped according to a clipping parameter corresponding to the second inter-carrier statistical feature to obtain the first clipping signal.

18. The method according to any one of claims 14 to 17, characterized in that: The carrier parameter, the first inter-carrier statistical feature, and the second inter-carrier statistical feature of the input signal are inter-carrier power ratios.

19. An adaptive peak-to-average ratio (PAPR) suppression device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to implement the method according to any one of claims 10-18 when executing the instructions.

20. A non-volatile computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 10 to 18 is implemented.

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