CN114584446A

CN114584446A - Carrier signal processing method, communication device and communication system

Info

Publication number: CN114584446A
Application number: CN202110351677.XA
Authority: CN
Inventors: 龚政委; 潘永朝; 官仕国; 林捷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-11-30
Filing date: 2021-03-31
Publication date: 2022-06-03

Abstract

The embodiment of the application provides a processing method of a carrier signal, a communication device and a communication system. The method comprises the following steps: according to the scheduling information respectively corresponding to the at least two carrier signals in the first time unit, clipping factors respectively corresponding to the at least two carrier signals in the first time unit are determined; at least two carrier signals and clipping factors respectively corresponding to the at least two carrier signals in a first time unit are sent to a radio frequency unit, and the clipping factors respectively corresponding to the at least two carrier signals in the first time unit are used for clipping processing of a combined signal of the at least two carrier signals. The scheme matches the clipping factor and the scheduling information corresponding to the plurality of carrier signals in the first time unit in real time, can improve the clipping performance, enables the radio frequency unit to perform clipping processing on the carrier signals based on the clipping factor received in real time, and can be used for improving the communication performance reduction caused by clipping of the multi-carrier signals.

Description

Carrier signal processing method, communication device and communication system

The priority of chinese patent application, entitled "method of processing carrier signal, communication apparatus, and communication system," filed by the chinese patent office on 30/11/2020, application No. 202011380681.0, is claimed and is incorporated herein by reference in its entirety.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, a communication device, and a communication system for processing a carrier signal.

Background

In a wireless communication system, a carrier signal to be transmitted is generally processed by a baseband module, a digital-to-analog/analog-to-digital conversion module, a radio frequency module, and the like and then transmitted by an antenna unit. In the signal processing process, performance indexes of different dimensions are usually introduced to represent the relevant performance of the signal, for example, a safety performance index, a demodulation performance index, a power amplifier performance index, a clipping performance index, an index for representing the degree of nonlinear distortion, and the like. In the system design process, multiple performance indexes are generally required to be comprehensively considered to ensure the communication quality.

A Power Amplifier (PA) unit in the rf module is responsible for power amplification of a signal, and the performance of power amplification is very sensitive to amplitude variation of the signal. Generally, the performance of power amplification is related to the peak-to-average power ratio (PAPR) of a signal, which is the ratio of the peak power of the signal to the average power. The instantaneous peak value of the signal with excessive PAPR exceeds the peak value bearing capacity of the power amplification unit, which may cause the power amplification unit to burn out. One possible countermeasure is to clip the transmitted signal by a clipping technique to reduce the PAPR value of the signal within a certain range, thereby ensuring the safety of the power amplifier unit. However, clipping techniques introduce non-linear distortion to the signal. Generally, the degree of nonlinear distortion can be characterized using an Error Vector Magnitude (EVM). The EVM index corresponds to a Modulation Order (MO) of a signal, for example, the EVM upper limit of Quadrature Phase Shift Keying (QPSK) is 15%, the EVM upper limit of 16 Quadrature Amplitude Modulation (QAM) is 11%, and the EVM upper limit of 256QAM is 3.5%. The larger the EVM, the larger the distortion, which in turn affects the communication performance.

In the scenario of multiple carrier signals, the clipping technique has a large impact on communication performance.

Disclosure of Invention

The application provides a processing method of carrier signals, a communication device and a communication system, which are used for improving the reduction of communication performance caused by clipping a plurality of carrier signals.

In a first aspect, an embodiment of the present application provides a method for processing a carrier signal, where the method is applied to a baseband unit or applied to a portion (e.g., a chip, a processor, etc.) within the baseband unit, and the method includes: according to scheduling information respectively corresponding to at least two carrier signals in a first time unit, clipping factors respectively corresponding to the at least two carrier signals in the first time unit are determined; and sending the at least two carrier signals and clipping factors respectively corresponding to the at least two carrier signals in a first time unit to a radio frequency unit, wherein the clipping factors respectively corresponding to the at least two carrier signals in the first time unit are used for clipping the combined signal of the at least two carrier signals.

Based on the scheme, the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are determined according to the time unit granularity, and the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are sent to the radio frequency unit, so that the radio frequency unit can finish clipping based on the time unit granularity, the clipping performance can be guaranteed, and the reduction of the communication performance caused by clipping of the plurality of carrier signals can be improved. And the baseband unit sends a plurality of carrier signals to the radio frequency unit, and the carrier signals respectively correspond to clipping factors in the first time unit, so that the load of a transmission interface can be reduced.

The baseband unit may send the scheduling information corresponding to the at least two carrier signals in the first time unit to the radio frequency unit, or may not send the scheduling information to the radio frequency unit. The load of the transmission interface can be further reduced without transmitting to the radio frequency unit.

In a possible implementation method, the determining, according to scheduling information corresponding to at least two carrier signals respectively in a first time unit, clipping factors corresponding to the at least two carrier signals respectively in the first time unit includes: determining a reference carrier signal of the at least two carrier signals; and determining a clipping factor corresponding to each carrier signal according to scheduling information corresponding to each carrier signal in the at least two carrier signals in the first time unit and scheduling information corresponding to the reference carrier signal in the first time unit.

Based on the scheme, the difference of the scheduling information of each carrier signal is considered, and the clipping factors respectively corresponding to each carrier signal in the first time unit can be accurately determined according to the scheduling information of each carrier signal, so that the clipping performance can be guaranteed, and the communication performance after the clipping of the multi-carrier signal can be further guaranteed. In some alternative implementations, the impact of different carrier bandwidths and/or powers on clipping performance, e.g., on EVM metrics, is considered.

In a second aspect, an embodiment of the present application provides a method for processing a carrier signal, where the method is applied to a radio frequency unit or applied to a portion (e.g., a chip, a processor, etc.) within the radio frequency unit, and the method includes: receiving at least two carrier signals from a baseband unit and clipping factors respectively corresponding to the at least two carrier signals in a first time unit, wherein the clipping factors respectively corresponding to the at least two carrier signals in the first time unit correspond to scheduling information respectively corresponding to the at least two carrier signals in the first time unit; and according to the clipping factors respectively corresponding to the at least two carrier signals in the first time unit, carrying out clipping processing on the combined signal of the at least two carrier signals.

Based on the scheme, the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are determined according to the time unit granularity, and the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are sent to the radio frequency unit, so that the radio frequency unit can finish clipping based on the time unit granularity, the clipping performance can be guaranteed, and the communication performance reduction caused by the clipping of the plurality of carrier signals can be improved. And the baseband unit sends a plurality of carrier signals to the radio frequency unit, and the carrier signals respectively correspond to clipping factors in the first time unit, so that the load of a transmission interface can be reduced.

In a possible implementation method, before performing clipping processing on a combined signal of the at least two carrier signals according to clipping factors respectively corresponding to the at least two carrier signals in a first time unit, it is determined that transmission of the clipping factors is reliable.

According to the scheme, the reliability of the clipping factor of interface transmission is judged based on the distributed architecture, the clipping reliability can be ensured, and therefore the communication performance reduction caused by the clipping of the multi-carrier signal can be improved.

In a possible implementation, if the transmission of the clipping factor is unreliable, the clipping process of the combined signal of the at least two carrier signals is cancelled, and/or the combined signal of the at least two carrier signals is cancelled.

Any implementation method based on the first aspect or any implementation method of the second aspect:

in one possible implementation method, the first time unit is a slot, a subframe, or an orthogonal frequency division multiplexing symbol.

In one possible implementation, the scheduling information includes one or more of power, modulation order, and bandwidth.

Based on the scheme, when the clipping factor is determined, the factors in the scheduling information, such as power, modulation order and bandwidth, can be referred to, so that the accuracy of the clipping factor is favorably ensured, the reliability of clipping is further ensured, and the reduction of communication performance caused by the clipping of the multi-carrier signal is improved.

In one possible implementation, the association of the clipping factor to a parameter in the scheduling information is a function or a table. Based on the above scheme, according to the function or the table, the clipping factor corresponding to the carrier signal can be determined according to the parameter of the scheduling information corresponding to the carrier signal.

In one possible implementation method, the association relationship between the clipping factor and the parameter in the scheduling information may be: f_i＝P_j/P_i；

Or

Wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of said ith carrier signal in said first time unit_jRepresenting the power, EVM, of the jth carrier signal in said first time unit_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the jth carrier signal in the first time unit is represented; BW (Bandwidth)_iRepresents a bandwidth, BW, of the ith carrier signal within the first time unit_jRepresents a bandwidth of the jth carrier signal within the first time unit,

represents a corresponding clipping modification factor of the ith carrier signal in the first time unit

In relation to the bandwidth of the ith carrier signal within the first time unit,

represents a corresponding clipping modification factor of the jth carrier signal in the first time unit, the

Regarding a bandwidth of the jth carrier signal in the first time unit, the jth carrier signal is a reference carrier signal, the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

In a third aspect, an embodiment of the present application provides a method for processing a carrier signal, where the method is applied to a baseband unit or applied to a portion (e.g., a chip, a processor, etc.) within the baseband unit, and the method includes: determining first clipping factors respectively corresponding to at least two carrier signals in a first time unit according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit and second clipping factors respectively corresponding to the at least two carrier signals in a second time unit, wherein the first time unit is contained in the second time unit; according to first clipping factors respectively corresponding to the at least two carrier signals in a first time unit, respectively carrying out independent clipping processing on each carrier signal of the at least two carrier signals; at least two carrier signals after clipping processing are sent to a radio frequency unit; the second clipping factor is used for clipping the combined signal of the at least two carrier signals after clipping processing.

According to the scheme, the baseband unit carries out independent primary clipping processing on each carrier signal respectively based on the first clipping factors respectively corresponding to each carrier signal in the first time unit, then sends the primary clipped carrier signal to the radio frequency unit, and the radio frequency unit carries out secondary clipping processing on the combined signal of the clipped carrier signals based on the second clipping factors to obtain the secondary clipped carrier signal. The method is a two-stage clipping processing scheme based on the combination of the real-time clipping of the baseband unit and the semi-static clipping of the radio frequency unit, can approach or exceed the real-time clipping performance of the radio frequency unit, and improves the reduction of communication performance caused by the clipping of a plurality of carrier signals. And, this two-stage clipping scheme, to the reliability change insensitivity of the transmission of middle interface, therefore use more nimble.

In a possible implementation method, the determining, according to the scheduling information corresponding to the at least two carrier signals in a first time unit and the second clipping factors corresponding to the at least two carrier signals in a second time unit, the first clipping factors corresponding to the at least two carrier signals in the first time unit includes: determining a reference carrier signal of the at least two carrier signals; and determining a first clipping factor corresponding to each carrier signal according to scheduling information corresponding to each carrier signal in the at least two carrier signals in the first time unit, scheduling information corresponding to the reference carrier signal in the first time unit, and second clipping factors corresponding to the at least two carrier signals in a second time unit.

Based on the scheme, the difference of the scheduling information of each carrier signal is considered, and the clipping factors respectively corresponding to each carrier signal in the first time unit can be accurately determined according to the scheduling information of each carrier signal, so that the clipping performance can be guaranteed, and the communication performance after the clipping of the multi-carrier signal can be further guaranteed.

In one possible implementation method, second clipping factors corresponding to the at least two carrier signals from the radio frequency unit in a second time unit are received.

Based on the scheme, the second clipping factor is determined by the radio frequency unit, and the calculation overhead of the baseband unit is reduced.

In one possible implementation, a corresponding second clipping factor for each of the carrier signals in the second time unit is determined.

Based on the scheme, the second clipping factor is determined by the baseband unit, and the calculation overhead of the radio frequency unit is reduced.

In one possible implementation, the determining a second clipping factor for each carrier signal in the second time unit includes: and determining a second clipping factor corresponding to each carrier signal in the second time unit according to a plurality of third clipping factors corresponding to each carrier signal in a third time unit in the at least two carrier signals, wherein the third time unit is earlier in time sequence than the second time unit.

In one possible implementation, the determining a second clipping factor for each carrier signal in the second time unit includes: and determining a second clipping factor corresponding to each carrier signal in a second time unit according to a plurality of first clipping factors corresponding to each carrier signal in the second time unit, wherein the second time unit comprises a plurality of first time units.

Optionally, the second clipping factor is determined based on a statistical value or an extreme value of the plurality of clipping factors. Optionally, an average value or a maximum value of a plurality of first clipping factors corresponding to each carrier signal in the first time unit is determined as a second clipping factor corresponding to the carrier signal in the second time unit.

Optionally, an average value or a maximum value of a plurality of third clipping factors corresponding to each carrier signal in the third time unit is determined as a second clipping factor corresponding to the carrier signal in the second time unit. In a possible implementation method, second clipping factors corresponding to the at least two carrier signals respectively in a second time unit are sent to the radio frequency unit.

In a fourth aspect, an embodiment of the present application provides a method for processing a carrier signal, where the method is applied to a radio frequency unit or applied to a portion (e.g., a chip, a processor, etc.) within the radio frequency unit, and the method includes: receiving at least two carrier signals subjected to clipping processing by a baseband unit, wherein the at least two carrier signals subjected to clipping processing are carrier signals subjected to independent clipping processing by using first clipping factors respectively corresponding to the at least two carrier signals in a first time unit, the first clipping factors are determined according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit and second clipping factors respectively corresponding to the at least two carrier signals in a second time unit, and the first time unit is included in the second time unit; and according to second clipping factors respectively corresponding to the at least two carrier signals in the second time unit, carrying out clipping processing on the combined signal of the at least two carrier signals after clipping processing.

According to the scheme, the baseband unit carries out independent primary clipping processing on each carrier signal respectively based on the first clipping factors respectively corresponding to each carrier signal in the first time unit, then sends the primary clipped carrier signal to the radio frequency unit, and the radio frequency unit carries out secondary clipping processing on the combined signal of the clipped carrier signals based on the second clipping factors to obtain the secondary clipped carrier signal. The method is a two-stage clipping processing scheme based on the combination of real-time clipping of a baseband unit and semi-static clipping of a radio frequency unit, and can approach or exceed the performance of the real-time clipping of the radio frequency unit, thereby improving the reduction of communication performance caused by the clipping of a plurality of carrier signals. And, this two-stage clipping scheme, to the reliability change insensitive of the transmission of the middle interface, therefore use more nimble.

In one possible implementation, the determining a second clipping factor for each carrier signal in the second time unit includes: determining an average value or a maximum value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit of the at least two carrier signals as a corresponding second clipping factor of each carrier signal in the second time unit, wherein the third time unit is earlier in time sequence than the second time unit.

In a possible implementation method, before receiving at least two carrier signals subjected to clipping processing by the baseband unit, second clipping factors respectively corresponding to the at least two carrier signals in a second time unit are sent to the baseband unit.

In one possible implementation, the determining a second clipping factor for each carrier signal in the second time unit includes: determining a second clipping factor corresponding to each of the at least two carrier signals in a second time unit according to a plurality of first clipping factors corresponding to each of the at least two carrier signals in the second time unit, wherein the second time unit comprises a plurality of first time units.

Optionally, the scheduling information corresponding to the second time unit sent by the baseband unit is received. Optionally, the scheduling information corresponding to the second time unit is pre-sent or sent in advance.

In one possible implementation method, second clipping factors corresponding to the at least two carrier signals from the baseband unit in a second time unit are received.

Any implementation method based on the third aspect or any implementation method based on the fourth aspect:

In one possible implementation, the scheduling information includes at least one of power, modulation order, and bandwidth.

In one possible implementation, the association of the first clipping factor to a parameter in the scheduling information is a function or a table. Based on the above scheme, according to the function or the table, the clipping factor corresponding to the carrier signal can be determined according to the parameter of the scheduling information corresponding to the carrier signal.

In one possible implementation method, the association relationship between the first clipping factor and the parameter in the scheduling information may be:

or

Wherein, the first and the second end of the pipe are connected with each other,

representing a corresponding first clipping factor for an ith of the at least two carrier signals within a jth of the second time units,

represents a corresponding second clipping factor for the ith carrier signal within the second time unit,

representing the power of the ith carrier signal in a jth first time cell of the second time cells,

representing the power of the kth carrier signal in the jth first one of said second time units,

represents the ith carrier signal inAn EVM threshold corresponding to a modulation order in the jth first time unit in the second time units,

and an EVM threshold corresponding to a modulation order of the kth carrier signal in the jth first time unit of the second time units is represented, the kth carrier signal is a reference carrier signal, and i is 1, 2, … …, n, j is 1, 2, … …, m.

In a fifth aspect, an embodiment of the present application provides a method for processing a carrier signal, including: determining peak-valley information of at least two carrier signals in a time domain, wherein the peak-valley information comprises peak information and/or valley information; determining the offset of the at least two carrier signals in the time domain according to the peak-valley information of the at least two carrier signals in the time domain; determining at least two adjusted carrier signals according to the offset of the at least two carrier signals in the time domain; and sending the adjusted at least two carrier signals to a radio frequency unit.

According to the scheme, the base band unit can realize reduction of the PAPR based on relative displacement of the plurality of carrier signals in the time domain, so that reduction of communication performance caused by clipping of the plurality of carrier signals is improved. And when the scheme is combined with the clipping treatment, the clipping pressure can be relieved, and the compromise between the safety of the power amplification unit and the EVM index of the system is better realized.

In one possible implementation, determining the adjusted at least two carrier signals includes reducing a peak superposition and/or a trough superposition of the at least two carrier signals.

In a possible implementation method, there is no peak superposition and/or trough superposition or peak superposition and/or trough superposition is reduced for any two carrier signals in the adjusted at least two carrier signals.

In one possible implementation method, the determining, according to peak-to-valley information of the at least two carrier signals in the time domain, an offset of the at least two carrier signals in the time domain includes: determining a reference carrier signal of the at least two carrier signals; and determining the offset of the non-reference carrier signal in the at least two carrier signals relative to the reference carrier signal in the time domain according to the peak-valley information of the reference carrier signal.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, which may be a baseband unit and may also be a chip for the baseband unit. The apparatus has a function of implementing each implementation method of the first aspect, the third aspect, or the fifth aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a seventh aspect, an embodiment of the present application provides a communication device, where the device may be a radio frequency unit, and may also be a chip for the radio frequency unit. The apparatus has a function of implementing each implementation method of the second aspect or the fourth aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In an eighth aspect, an embodiment of the present application provides a communication apparatus, including a processor and a memory; the memory is used for storing computer-executable instructions, and when the apparatus is operated, the processor executes the computer-executable instructions stored in the memory, so that the apparatus executes the implementation methods of the first aspect to the fifth aspect.

In a ninth aspect, embodiments of the present application provide a communication apparatus, which includes means or units (means) for performing the steps of the implementation methods of the first aspect to the fifth aspect.

In a tenth aspect, an embodiment of the present application provides a communication device, including a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and execute each implementation method of the first aspect to the fifth aspect. The processor includes one or more.

In an eleventh aspect, an embodiment of the present application provides a communication apparatus, which includes a processor, configured to connect to a memory, and configured to invoke a program stored in the memory to execute each implementation method of the first aspect to the fifth aspect. The memory may be located within the device or external to the device. And the processor includes one or more.

In a twelfth aspect, embodiments of the present application further provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the instructions cause the implementation methods of the first aspect to the fifth aspect to be performed.

In a thirteenth aspect, the present application further provides a computer program product, where the computer program product includes a computer program, and when the computer program runs, the method in each of the implementations of the first aspect to the fifth aspect is executed.

In a fourteenth aspect, an embodiment of the present application further provides a chip system, including: a processor configured to perform the implementation methods of the first aspect to the fifth aspect.

In a fifteenth aspect, an embodiment of the present application further provides a communication system, including a baseband unit configured to perform any implementation method of the first aspect and/or a radio frequency unit configured to perform any implementation method of the second aspect.

In a sixteenth aspect, an embodiment of the present application further provides a communication system, including a baseband unit configured to perform any implementation method of the third aspect and/or a radio frequency unit configured to perform any implementation method of the fourth aspect.

In a seventeenth aspect, embodiments of the present application further provide a communication system, including a baseband unit configured to perform any implementation method of the fifth aspect and/or a radio frequency unit configured to receive the adjusted at least two carrier signals from the baseband unit.

Drawings

Fig. 1 is a distributed architecture with separate baseband units and radio frequency units;

fig. 2 is a schematic diagram of a carrier signal processing method according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a timing operation according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating another carrier signal processing method according to an embodiment of the present application;

FIG. 5 is a diagram illustrating a relationship between a second time unit and a third time unit;

FIG. 6 is a schematic diagram of another timing operation provided in the embodiments of the present application;

fig. 7 is a schematic diagram illustrating another carrier signal processing method according to an embodiment of the present application;

fig. 8 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic diagram of another communication device according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, "at least two" means two or more, and "at least two" may also be expressed as "a plurality" hereinafter, which have the same meaning, and are described in a unified manner here, and will not be described again later.

Terms and concepts in the embodiments of the present application are described below.

One, carrier wave

A carrier wave (carrier signal or carrier) is a physical concept, which is a radio wave of a specific frequency.

In communication technology, a carrier wave is an electrical wave generated by an oscillator and transmitted over a communication channel, modulated to carry voice or other information. On the wireless channel, a carrier is often used for information transfer, digital signals are modulated (frequency converted) onto a high frequency carrier (since the higher the frequency, the longer the transmission distance), and then transmitted and received over the air.

Carrier signal, base band signal, radio frequency signal

A carrier signal may be understood as a signal corresponding to a system bandwidth, such as a 5MHz/10MHz/20MHz bandwidth. A signal composed of a plurality of adjacent 5MHz/10MHz/20MHz is a multi-carrier signal. For example, a first carrier signal of 10MHz bandwidth spans a frequency of [ -5, 5], and an adjacent second carrier signal of 20MHz bandwidth spans a frequency of [5, 25 ].

A baseband signal refers to a signal processed by a baseband unit (BBU). The baseband signal is typically a digital signal. If the baseband signal needs to be transmitted through an electric wave, the baseband signal needs to be modulated to 700MHz or 2100MHz, and this modulation process is generally implemented by a radio frequency device, that is, the baseband signal corresponding to a single carrier or multiple carriers is moved to a center frequency point of 700MHz or 2100 MHz.

Radio frequency signal refers to a signal processed by a Radio Unit (RU). The radio frequency signal is typically an analog signal.

The relationship between the carrier signal, the baseband signal and the radio frequency signal is: the carrier signal is a representation of the signal in the frequency domain dimension; the hardware processing entity of the baseband signal for representing the carrier signal is a baseband unit; the hardware processing entity of the radio frequency signal used to characterize the carrier signal is the radio frequency unit. The baseband signal and the radio frequency signal can be converted into each other by some devices such as analog/digital conversion.

In the embodiment of the present application, the plurality of carrier signals are also referred to as multi-channel carrier signals, multi-carrier signals, at least two carrier signals, or signals corresponding to a plurality of carriers, and refer to carrier signals that use a modulation technique to implement multiplexing in multi-channel communication, and include two or more channel carrier signals.

Third, time unit

In the embodiment of the present application, for example, a time unit refers to a unit corresponding to a time unit. The time unit refers to a time unit or a scheduling unit in a time domain and/or a frequency domain for information transmission, for example, the time unit (e.g., a first time unit, a second time unit, a third time unit, a fourth time unit, etc.) may be a slot (slot), a subframe (subframe) or an Orthogonal Frequency Division Multiplexing (OFDM) symbol, may also refer to a slot (slot), may also refer to a radio frame, a micro slot or a sub slot, a plurality of aggregated slots, a plurality of aggregated subframes, a symbol, etc., and may also refer to a Transmission Time Interval (TTI), which is not limited in this application. For example, one or more time unit time domains of a time unit may include an integer number of time units of another time unit, or one or more time unit time domain lengths of a time unit may be equal to the sum of the time unit lengths of an integer number of another time unit, for example, one micro slot/subframe/radio frame includes an integer number of symbols, one slot/subframe/radio frame includes an integer number of micro slots, one subframe/radio frame includes an integer number of slots, one radio frame includes an integer number of subframes, and the like.

In the present application, time units may be distinguished, labeled, or counted by indexing, identifying, or otherwise.

Fourth, scheduling information

In the embodiment of the present application, the scheduling information is information for scheduling a carrier signal, and illustratively, the scheduling information includes one or more of power, modulation order, or bandwidth. Here, the power may be a transmission power (or a transmission power) of the carrier signal, the modulation order may be, for example, QPSK, 16QAM, 256QAM, or the like, and the bandwidth may be a bandwidth occupied by the carrier signal. It should be noted that the scheduling information in the embodiment of the present application is not limited to power, bandwidth, or modulation order, and may also be other information for scheduling the carrier signal in practical applications.

In the embodiment of the application, one carrier signal corresponds to one scheduling information in one time unit. Illustratively, the scheduling information corresponding to a carrier signal in a time unit refers to the scheduling information for scheduling the carrier signal in the time unit. In the case of multiple carrier signals, the scheduling information corresponding to each of the multiple carrier signals in one time unit may be expressed as: the scheduling information corresponding to the plurality of carrier signals in the time unit respectively, that is, each carrier signal corresponds to one scheduling information.

The scheduling information may be used to calculate a clipping factor for the carrier signal. For example, the clipping factor corresponding to each carrier signal may be calculated according to the power corresponding to each of the plurality of carrier signals. For example, the clipping factor corresponding to each carrier signal may be calculated according to the power and/or bandwidth corresponding to each of the plurality of carrier signals.

Fifthly, clipping noise and clipping factor

Because the instantaneous peak value of the signal with the overlarge PAPR exceeds the peak value bearing capacity of the power amplification unit, the power amplification unit can be burnt, so that the transmitted signal needs to be clipped by a clipping technology in an actual system, the PAPR value of the signal is reduced within a certain range, and the safety of the power amplification unit is ensured. That is, the signal needs to be clipped before power amplification.

For example, clipping refers to amplitude limiting for a signal that fluctuates in amplitude in the time domain or the frequency domain, for a portion of the fluctuating amplitude exceeding a certain threshold, similar to the action of clipping the "peak portion" of the fluctuating signal. Achieving a "peak" partial subtraction of the signal is analogous to adding a portion of a "peak-canceling" signal to the signal in the "peak" region, which in essence may be defined as clipping noise. Among them, the factor of the clipping noise is referred to as "clipping factor".

The clipping factor may be understood as the proportion of the allocation among the different carriers that is subject to clipping noise, compared to the proportion of the base carrier (or referred to as reference carrier) being 1, the value of the other carriers may be greater than, equal to or less than 1. Illustratively, the clipping factor of carrier a is greater than 1, indicating that carrier a is subjected to more clipping noise than the base carrier; the clipping factor of the carrier B is 1, which shows that the carrier B bears less clipping noise than the basic carrier; the clipping factor of carrier C is 1, indicating that carrier C suffers the same clipping noise as the base carrier. It will be readily appreciated that the clipping factor may also be referred to as a clipping parameter, clipping coefficient or clipping ratio, etc.

For example, performing individual clipping on each carrier signal refers to a clipping object being a signal corresponding to a single carrier. For another example, clipping a combined signal of a plurality of carrier signals means that a clipping target is a mixed signal of signals corresponding to the plurality of carriers.

It should be noted that whether the clipping factor is used reasonably may affect the EVM index and PAPR index of the signal, and ultimately affect the security of the power amplifier.

Sixth, radio frequency unit, baseband unit

One baseband unit may support multiple radio units. By adopting a multi-channel scheme of the baseband unit and the radio frequency unit, the indoor coverage of a large venue can be well solved.

The baseband unit and the radio frequency unit can adopt optical fiber transmission, and the radio frequency unit is connected to an antenna through a coaxial cable, a power divider (coupler) and the like, namely, the trunk adopts optical fibers, and the branch adopts the coaxial cable.

A baseband unit (BBU) is mainly used to complete a baseband processing function (including but not limited to coding, multiplexing, modulating, or spreading, etc.) of the Uu interface, an Iub interface function of a Radio Network Controller (RNC), a signaling processing function, a local and remote operation maintenance function, and a working state monitoring and alarm information reporting function of the base station system, etc.

A Radio Unit (RU) is mainly used to convert a digital carrier signal into a radio frequency signal and transmit the radio frequency signal through an antenna. Illustratively, the radio frequency unit includes, but is not limited to: the device comprises an intermediate frequency module, a transceiver module, a power amplifier module or a filtering module. The intermediate frequency module is used for modulation and demodulation, digital up-down conversion, analog-to-digital conversion and the like of optical transmission. The transceiver module completes the conversion from the intermediate frequency signal to the radio frequency signal, and the radio frequency signal is transmitted out through the antenna port through the power amplification module and the filtering module. The radio frequency unit may be a Remote Radio Unit (RRU) or an Adaptive Antenna Unit (AAU).

In the embodiment of the application, the radio frequency unit may be remote or not.

In one implementation, the rf unit and the baseband unit may be integrated in the same physical entity, such as a base station, without the rf unit being pulled out.

With the development of the integration level of the radio frequency module of the communication system, a single radio frequency module can be used for simultaneously processing a plurality of carrier signals with different central frequency points. Further, the new features introduced by the multicarrier signal may introduce more challenges to the clipping processing technique.

Considering that different carrier signals may correspond to different scheduling information, for example, the scheduling information may include power or bandwidth, etc., the difference of the scheduling information of the carriers may have an impact on the clipping performance, for example, the difference of the signal transmission power corresponding to the different carrier signals may cause a mismatch with the clipping noise power introduced by clipping of the radio frequency module, and for example, the difference of the total bandwidth of the signals corresponding to the different carriers may cause a difference of PAPR of the corresponding signals. The embodiment of the application introduces a method for optimizing clipping according to multi-dimensional characteristics of a multi-carrier signal, which is used for improving the communication performance reduction caused by clipping the multi-carrier.

In view of the above, considering that different carriers may correspond to different scheduling information, generally, clipping optimization needs to be performed based on multi-dimensional characteristics of a multi-carrier signal, for example, clipping factors are determined according to one or more of power, modulation order, bandwidth, and the like corresponding to the multi-carrier signal. The method comprises the following steps:

step A: according to the scheduling information corresponding to the multi-carrier signal (at least two carrier signals), the scheduling information comprises one or more of power or bandwidth, and the like, the clipping factors corresponding to the at least two carrier signals are determined respectively.

Namely, when determining the clipping factor corresponding to the carrier signal, that is, when determining the proportion of the carrier signal subjected to clipping noise, the influence of the difference of the scheduling information corresponding to the carrier signal on the clipping performance is considered. For example, the impact of such differences on clipping performance may be that differences in the transmission power of signals corresponding to different carrier signals cause mismatch between the clipping noise power introduced by clipping and the signal transmission power of the respective carrier, resulting in different EVMs. Or it may be that the difference in bandwidth of the signals corresponding to different carrier signals causes the demodulation performance of the signals to deteriorate.

It is to be understood that the clipping factor corresponding to the carrier signal is associated with one or more of the scheduling information corresponding to the carrier signal, and the association may be a function or a table.

In one possible implementation, the scheduling information includes one or more of power, modulation order, or bandwidth.

And B: the clipping factors corresponding to the at least two carrier signals are applied to the at least two carrier signals, respectively.

One possible implementation is to apply the clipping factor to the multi-carrier signal. It is easy to understand that the implementation may be implemented by a unit or module (e.g., the first module) having a clipping processing function. In one possible approach, the first module performs step B after performing step a, i.e. the determination of the clipping factor and the application of the clipping factor on the carrier signal may be performed by the first module. The above-described application of the clipping factor to the multicarrier signal is to be understood as the steps a and B are implemented in one module or unit. Optionally, the first module is a radio remote unit or a baseband unit.

In another possible implementation, the clipping factor is transmitted to a unit or module (e.g., a second module) having a function of performing clipping processing, for example, the second module is a radio frequency unit, and the clipping factor is applied to the multicarrier signal by the radio frequency unit.

In one possible implementation, a first clipping factor is applied to the at least two carrier signals; and transmitting the second clipping factor to a unit or module with the function of clipping processing, and clipping the at least two carrier signals by the unit or module with the function of clipping processing according to the second clipping factor. Illustratively, the first clipping factor is determined based on the second clipping factor and scheduling information corresponding to the carrier signal. It can be understood that while the first clipping factor is used to independently clip the signal of the single carrier, the determination of the first clipping factor can also consider the second clipping factor of the multi-carrier combined signal from the radio frequency side, so as to further realize the joint optimization of multi-carrier and multi-stage clipping. An exemplary implementation may refer to the associated description of step 401.

Optionally, when the clipping factor needs to be transmitted to a unit or a module having a function of clipping, that is, when information interaction needs to be performed between two network elements or modules through an interface, transmission reliability verification of the interface may also be performed, so as to reduce the influence of the transmission interface reliability on the clipping performance. An exemplary implementation may refer to the associated description of fig. 3.

By the method, when the clipping factors corresponding to the plurality of carrier signals are determined, the clipping performance is optimized by considering the scheduling information corresponding to the plurality of carrier signals, for example, the clipping factors are determined according to the power and/or the bandwidth in the scheduling information, so that the influence on the clipping performance caused by different carrier signals with different powers and/or bandwidths is reduced, and the reduction of the communication performance caused by clipping the multiple carriers is improved. With respect to the above step a and step B, several specific implementation methods are described below.

In the first implementation method, the baseband unit determines clipping factors respectively corresponding to at least two carrier signals in a first time unit according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit, and then the baseband unit performs clipping processing on a combined signal of the at least two carrier signals according to the clipping factors respectively corresponding to the at least two carrier signals in the first time unit. That is, the baseband unit determines the clipping factor, and the baseband unit performs the clipping processing based on the determined clipping factor.

In the second implementation method, the radio frequency unit determines clipping factors respectively corresponding to at least two carrier signals in a first time unit according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit, and then the radio frequency unit performs clipping processing on a combined signal of the at least two carrier signals according to the clipping factors respectively corresponding to the at least two carrier signals in the first time unit. That is, the clipping factor is determined by the radio frequency unit, and the clipping processing is performed by the radio frequency unit based on the determined clipping factor.

In the third implementation method, the baseband unit determines clipping factors respectively corresponding to the at least two carrier signals in the first time unit according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit, then the baseband unit sends the clipping factors respectively corresponding to the at least two carrier signals in the first time unit to the radio frequency unit, and the radio frequency unit performs clipping processing on a combined signal of the at least two carrier signals according to the clipping factors respectively corresponding to the at least two carrier signals in the first time unit. That is, the baseband unit determines the clipping factor, then sends the clipping factor to the radio frequency unit, and the radio frequency unit performs clipping processing based on the received clipping factor.

In the fourth implementation method, the baseband unit determines, according to the scheduling information corresponding to the at least two carrier signals in the first time unit, first clipping factors corresponding to the at least two carrier signals in the first time unit, respectively, and then the baseband unit performs, according to the first clipping factors corresponding to the at least two carrier signals in the first time unit, separate clipping processing on the at least two carrier signals, respectively. Then the baseband unit sends the clipped at least two carrier signals to the radio frequency unit, and the radio frequency unit carries out clipping processing on the combined signal of the at least two carrier signals according to second clipping factors respectively corresponding to the at least two carrier signals in a second time unit. Wherein the second time unit comprises one or more first time units. That is, the baseband unit performs a first-level clipping process, and the radio frequency unit performs a second-level clipping process. The second clipping factors respectively corresponding to the at least two carrier signals in the second time unit may be determined by the baseband unit or the radio frequency unit. Optionally, when determining the first clipping factors respectively corresponding to the at least two carrier signals in the first time unit, the baseband unit further refers to the second clipping factors respectively corresponding to the at least two carrier signals in the second time unit.

Certainly, the embodiment of the present application is not limited to the above four specific implementation methods, and in practical applications, there may be other implementation methods, for example, the radio frequency unit performs separate clipping processing (i.e., first-stage clipping) on the multiple carrier signals according to the first clipping factors respectively corresponding to the multiple carrier signals in the first time unit, and then performs clipping processing (i.e., second-stage clipping) on the combined signal of the multiple carrier signals after clipping processing.

Fig. 1 shows an architecture suitable for the embodiment of the present application. The architecture includes a baseband unit and a radio frequency unit.

The baseband unit may send the multiple carrier signals to the radio frequency unit through an intermediate interface (e.g., a Common Public Radio Interface (CPRI), an enhanced common public radio interface (e-CPRI), or the like) for combining and clipping. Or the baseband unit separately clips the plurality of carrier signals respectively, and then sends the clipped plurality of carrier signals to the radio frequency unit through the CPRI or e-CPRI and the like to perform combined clipping. It is easy to understand that the baseband unit separately clips the plurality of carrier signals, and it can also be understood that each baseband subunit separately clips the signal corresponding to a single carrier.

Of course, in practical applications, the baseband unit and the rf unit may not be separated from each other, but integrated in the same physical device.

It should be noted that, in the embodiment of the present application, a radio frequency unit and a baseband unit are taken as examples to implement the method for processing a carrier signal in the embodiment of the present application. With the evolution of the communication technology, other devices having the functions of the radio frequency unit and the baseband unit in the embodiments of the present application may also implement the method for processing the carrier signal in the embodiments of the present application, which is not limited in the embodiments of the present application.

The following describes a process of processing a carrier signal by taking the third implementation method and the fourth implementation method as examples.

Fig. 2 is a schematic diagram illustrating a method for processing a carrier signal according to an embodiment of the present application.

The method is a carrier processing implementation process corresponding to the third implementation method. The method includes that a base band unit generates different carrier signals based on time unit scheduling, the base band unit determines corresponding clipping factors of a plurality of carrier signals in the time unit according to multi-dimensional characteristics of scheduling information, the clipping factors are transmitted to a radio frequency unit, and the radio frequency unit carries out clipping processing on the multi-carrier signals according to the clipping factors.

The method comprises the following steps:

step 201, the baseband unit determines clipping factors corresponding to a plurality of carrier signals in a first time unit according to scheduling information corresponding to the plurality of carrier signals in the first time unit, respectively.

Wherein each carrier signal corresponds to one scheduling information in the first time unit. The scheduling information includes one or more of power, modulation order, bandwidth. It will be readily appreciated that the scheduling information may also be other information used to schedule or modulate the carrier signal. Determining the clipping factor, for example, based on the power and/or bandwidth in the scheduling information, reduces the impact on clipping performance due to different power and/or bandwidth of different carrier signals.

That is, the clipping factor is related to the scheduling information, for example, the relation between the clipping factor and the parameter in the scheduling information is a function, a table, or the like. Based on the above scheme, according to the function or the table, the clipping factor corresponding to the carrier signal can be determined according to the parameter of the scheduling information corresponding to the carrier signal. The function may be any form of function, such as a hash function, a ratio function, etc. The table here may be any form of table, such as a database table.

Take the example that the association of the clipping factor to the parameters in the scheduling information is a function. For example, the function is a ratio function, i.e. the clipping factor corresponding to a carrier signal in a first time unit is determined based on a ratio between one or more parameters (e.g. power, modulation order, bandwidth) of the scheduling information corresponding to the carrier signal in the first time unit and one or more parameters of the scheduling information corresponding to a preconfigured or predefined reference carrier signal in the first time unit. For another example, the function is a hash function, that is, one or more parameters of scheduling information corresponding to a carrier signal in a first time unit are substituted into a preconfigured or predefined hash function to obtain a corresponding clipping factor of the carrier signal in the first time unit.

Take table as an example of the association relationship between the clipping factor and the parameter in the scheduling information. Tables 1 to 3 below are different examples.

TABLE 1

Power corresponding to carrier signal	Clipping factor corresponding to carrier signal
		P1	F1
P2	F2
		P3	F3
……	……

TABLE 2

TABLE 3

The following describes a method for determining the clipping factor with reference to a specific example. It should be noted that this example does not in itself constitute a limitation on the method of confirmation of the clipping factor. This example is illustrated by a ratio function.

As one implementation method, assume that there are n carrier signals, i represents the ith carrier signal, and i is equal to 1, 2, … …, n. Using F_iRepresenting the corresponding clipping factor, P, of the ith carrier signal in a first time unit_iRepresenting the power, P, of the ith carrier signal in a first time unit_jIndicating the power of the jth carrier signal in the first time unit, EVM_iAn EVM threshold representing the modulation order of the ith carrier signal in the first time unit_jAn Error Vector Magnitude (EVM) threshold, BW, corresponding to a modulation order of the jth carrier signal in the first time unit_iRepresenting the bandwidth of the ith carrier signal in the first time unit,

represents the corresponding clipping correction factor of the ith carrier signal in the first time unit,

and BW_iRelated, generally BW_iThe larger the size of the tube is,

the smaller. BW (Bandwidth)_jRepresenting the bandwidth of the jth carrier signal in the first time unit,

indicating the corresponding clipping correction factor of the jth carrier signal in the first time unit. Wherein the clipping correction factor is related to the bandwidth of the carrier signal.

Wherein the jth carrier signal is a reference carrier signal. Exemplarily, the 1 st carrier signal may be predetermined, preconfigured or dynamically configured as the reference carrier signal, that is, j is 1; or pre-appointing or pre-configuring the carrier signal with the maximum power as the reference carrier signal, that is, the value of j is the number of the carrier signal with the maximum power. That is to say, there are various implementation manners for selecting the reference carrier signal, and the reference carrier signal may be one of the carrier signals or a predefined carrier signal, which is not limited in the embodiment of the present application. It is easy to understand that when the reference carrier signal is dynamically configured, it may also include dynamically interacting the reference carrier signal between different network elements. For example, the index or identification of the carrier signal is dynamically exchanged, or other means by which the reference carrier signal can be identified. The reference carrier signal in the embodiments of the present application may also be referred to as a base carrier signal.

Exemplarily, F_i＝f{(P_i)}＝P_j/P_iI ═ 1, 2, … …, n, (equation 1-1)

By way of example, it is possible to provide,

in an exemplary manner, the first and second electrodes are,

in an exemplary manner, the first and second electrodes are,

by way of example, it is possible to provide,

in an exemplary manner, the first and second electrodes are,

in an exemplary manner, the first and second electrodes are,

in particular, F_j＝1。

It should be noted that the above formula is only used as an example, and does not constitute a limitation for determining the corresponding clipping factor of the ith carrier signal in the first time unit in the embodiment of the present application.

For example, in the above formulas (1-2), (1-3), (1-4) and (1-5)

And

the square of (2) may be modified to a power of 3, a power of 4, or the like.

Step 202, the baseband unit sends the clipping factors corresponding to the plurality of carrier signals in the first time unit to the radio frequency unit. Correspondingly, the radio frequency unit receives clipping factors corresponding to the plurality of carrier signals in the first time unit respectively.

For example, the baseband unit sends, to the radio frequency unit, clipping factors corresponding to the plurality of carrier signals in the first time unit through an intermediate interface (e.g., CPRI or e-CPRI) between the baseband unit and the radio frequency unit, so that the radio frequency unit can receive the clipping factors corresponding to the plurality of carrier signals in the first time unit.

As an implementation method, if the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are calculated according to any one of the above formulas (1-1) to (1-6), when the jth carrier signal is selected as the reference carrier signal, since the clipping factor corresponding to the jth carrier signal is 1, the baseband unit and the radio frequency unit may agree in advance that the clipping factor corresponding to the jth carrier signal is 1, and therefore the baseband unit may transmit n-1 clipping factors other than the clipping factor corresponding to the jth carrier signal to the radio frequency unit, instead of transmitting the agreed clipping factor corresponding to the jth carrier signal.

As an implementation method, the formula for determining the clipping factor of the carrier signal can be flexibly selected according to different performance requirements. For example, a trigger condition may be preconfigured, and when the performance meets a certain threshold, the clipping factor is calculated according to a preselected formula.

In step 203, the baseband unit sends the plurality of carrier signals to the rf unit. Accordingly, the radio frequency unit receives the plurality of carrier signals.

There is no timing constraint between step 202 and step 203. For example, the two may be sent together or in different messages, but the order of sending the two is not limited.

Step 204, the radio frequency unit performs clipping processing on the combined signal of the plurality of carrier signals according to the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit.

Namely, the radio frequency unit carries out clipping processing on the combined signal of the multi-carrier signal corresponding to the first time unit based on the clipping factor. The method for clipping the combined signal of the at least two carrier signals by the rf unit may be, for example, amplitude limiting clipping or kenerl clipping.

For example, there are 3 carrier signals, i.e., carrier signal 1, carrier signal 2, and carrier signal 3. The clipping factors corresponding to the 3 carrier signals are clipping factor 1, clipping factor 2 and clipping factor 3. The radio frequency unit applies the clipping factor 1 to the carrier signal 1 in the combined signal of the 3 carrier signals, applies the clipping factor 2 to the carrier signal 2 in the combined signal of the 3 carrier signals, and applies the clipping factor 3 to the carrier signal 3 in the combined signal of the 3 carrier signals, so as to realize clipping processing and obtain the combined signal after clipping.

Illustratively, the combined signal may be understood as a representation in the time domain, becoming one signal. By frequency domain conversion, the rational signal can be separated into signals of a plurality of carriers, wherein the plurality of carriers can be understood as having different center carrier frequencies.

Based on the scheme, the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are determined according to the time unit granularity, and the clipping factors respectively corresponding to the plurality of carrier signals in the first time unit are sent to the radio frequency unit, so that the radio frequency unit can finish clipping based on the time unit granularity, the clipping performance can be guaranteed, and the communication performance reduction caused by the clipping of the plurality of carrier signals can be improved. And when the baseband unit and the radio frequency unit perform information interaction in an interface mode, the baseband unit sends clipping factors corresponding to a plurality of carrier signals in the first time unit to the radio frequency unit, so that the load of a transmission interface can be reduced.

It is easy to understand that the information transfer between the baseband unit and the rf unit may be implemented based on a transmission interface, and the transmission interface implementing this type may be an optical fiber, but the optical fiber transmission also has a certain error probability, and the reliability of the information transfer between the baseband unit and the rf unit may be affected based on the interface transmission with the error probability.

After step 203, the rf unit may further determine the transmission reliability of the clipping factor, and in case that the transmission of the clipping factor is determined to be reliable, the rf unit performs step 204.

For example, in the case that it is determined that the transmission of the clipping factor is not reliable, the clipping processing of the combined signal of the at least two carrier signals in the time unit is cancelled, and the combined signal of the at least two carrier signals corresponding to the time unit is cancelled. It is easy to understand that the above-mentioned performing of the interface reliability determination is an optional step, and in addition, the reliability verification of the clipping factor is not limited to the performing, including the reliability verification of the information transmitted through the interface, for example, the clipping factor, the scheduling information, and the like.

Optionally, the method for determining the transmission reliability of the clipping factor by the radio frequency unit may, for example, adopt a Cyclic Redundancy Check (CRC) method. The reliability of the clipping factor transmitted by the interface is judged, the clipping reliability can be ensured, the safety of a power amplifier unit is guaranteed, and the problem of communication performance reduction caused by clipping of a plurality of carrier signals is solved. For example, in a scenario where transmission needs to be performed between the baseband unit and the rf unit through the intermediate interface, there may be an error in the intermediate interface transmission between the baseband unit and the rf unit. Therefore, the problem of communication performance degradation caused by clipping of multiple carrier signals can be further improved. Optionally, in a case where the radio frequency unit determines that transmission of the clipping factor is unreliable, the baseband unit may cancel sending the combined signal of the multiple carrier signals. In the case where the transmission of the combined signal of the plurality of carrier signals is cancelled, the operation of clipping the combined signal of the plurality of carrier signals may not be performed, so that overhead may be reduced.

Referring to fig. 3, a corresponding timing operation diagram is shown. At time t1, the baseband unit determines clipping factors corresponding to the plurality of carrier signals in the first time unit, and sends the clipping factors corresponding to the plurality of carrier signals in the first time unit to the radio frequency unit. At time t2, the rf unit receives clipping factors corresponding to the multiple carrier signals in the first time unit, and determines transmission reliability of the clipping factors. At time t3, the rf unit performs clipping processing on the combined signal of the multiple carrier signals and then transmits the combined signal, or cancels transmission of the combined signal of the multiple carrier signals, according to the determination result of the transmission reliability.

Fig. 4 is a schematic diagram illustrating a method for processing a carrier signal according to an embodiment of the present application. The method is a carrier processing implementation process corresponding to the fourth implementation method. The method comprises the steps that different carrier signals are generated by a base band unit based on time unit scheduling, the base band unit determines first clipping factors corresponding to a plurality of carrier signals in a first time unit respectively according to multi-dimensional characteristics of scheduling information, the carrier signals are clipped separately (also called primary clipping) based on the first clipping factors corresponding to the carrier signals in the first time unit respectively, then the carrier signals subjected to clipping processing are sent to a radio frequency unit, and the radio frequency unit further clips a combined signal of the carrier signals (also called secondary clipping) based on second clipping factors corresponding to the carrier signals in a second time unit.

The method comprises the following steps:

step 401, the baseband unit determines, according to the scheduling information corresponding to the plurality of carrier signals in the first time unit, first clipping factors corresponding to the plurality of carrier signals in the first time unit, respectively.

The scheduling information corresponding to the multiple carrier signals in the first time unit may be understood as a set of scheduling information of the multiple carrier signals in the first time unit.

That is, the first clipping factor is related to the scheduling information, for example, the relationship between the first clipping factor and the parameter in the scheduling information is a function, a table, or the like. Based on the above scheme, according to the function or the table, the first clipping factor corresponding to the carrier signal can be determined according to the parameter of the scheduling information corresponding to the carrier signal. The function may be any form of function, such as a hash function, a ratio function, etc. The table here may be any form of table, such as a database table.

Take the example that the association of the first clipping factor to a parameter in the scheduling information is a function. For example, the function is a ratio function, i.e. a first clipping factor corresponding to a carrier signal in a first time unit is determined according to a ratio between one or more parameters (e.g. power, modulation order, bandwidth) of scheduling information corresponding to the carrier signal in the first time unit and one or more parameters of scheduling information corresponding to a preconfigured or predefined reference carrier signal in the first time unit. For another example, the function is a hash function, that is, one or more parameters of scheduling information corresponding to a carrier signal in a first time unit are substituted into a preconfigured or predefined hash function to obtain a first clipping factor corresponding to the carrier signal in the first time unit.

As a possible implementation method, the baseband unit may employ the method in the corresponding embodiment of fig. 2 described above to determine the first clipping factors corresponding to the plurality of carrier signals in the first time unit, respectively. For a specific implementation process, reference may be made to the foregoing description, which is not repeated herein.

As a possible implementation, the baseband unit may determine the first clipping factor based on the second clipping factor. Illustratively, the baseband unit receives a second clipping factor transmitted by the radio frequency unit, the second clipping factor being used to clip the carrier signal in a second time unit. The clipping factor interaction mode is adopted, and when the clipping factor is determined, the coupling of multi-level clipping factors is considered, so that the pre-processing of clipping (such as single carrier clipping) and the clipping of a combined signal of a plurality of carrier signals are coupled, and the clipping performance is further improved.

As a possible implementation method, the baseband unit may also determine, according to the scheduling information corresponding to the plurality of carrier signals in the first time unit and the second clipping factors corresponding to the plurality of carrier signals in the second time unit, the first clipping factors corresponding to the plurality of carrier signals in the first time unit, respectively. Wherein the second time unit comprises one or more first time units.

The method for determining the first clipping factor is described below with reference to a specific example. It should be noted that this example does not in itself constitute a limitation on the confirmation method of the first clipping factor. This example is illustrated by a ratio function.

As one implementation method, assume that there are n carrier signals, i denotes the ith carrier signal of the n carrier signals, and i is 1, 2, … …, n. The second time unit is divided into m first time units, j represents j which is 1, 2, … …, m. The plurality of first time units included in the second time unit may be the same or different.

Use of

Representing a corresponding first clipping factor for the ith carrier signal in the jth first one of the second time units,

representing a corresponding second clipping factor for the ith carrier signal in a second time unit,

representing the power of the ith carrier signal in the jth first time cell in the second time cell,

representing the power of the kth carrier signal in the jth first time cell in the second time cell,

an EVM threshold corresponding to a modulation order of the ith carrier signal in the jth first time unit in the second time unit,

and the EVM threshold represents the corresponding modulation order of the kth carrier signal in the jth first time unit in the second time unit. It is noted that

The bandwidth factor has been reflected because due to the slow varying nature of the bandwidth, it is assumed that the bandwidths corresponding to the different carrier signals in the second time unit are all the same.

Wherein the kth carrier signal is a reference carrier signal. Exemplarily, the 1 st carrier signal may be predetermined or preconfigured to be a reference carrier signal, that is, k here takes a value of 1; or pre-appointing or pre-configuring the carrier signal with the maximum power as the reference carrier signal, that is, k is the number of the carrier signal with the maximum power.

In an exemplary manner, the first and second electrodes are,

in an exemplary manner, the first and second electrodes are,

formula 3-2)

In an exemplary manner, the first and second electrodes are,

in particular, it is possible to use, for example,

the following takes equation (3-1) as an example, and describes equation (3-1) with reference to a specific example. In the following example, the 1 st carrier signal is used as the reference carrier signal, that is, k in the formula (3-1) is 1.

Assuming 4 carrier signals, the second time unit is 1s, and the first time unit is 1ms, the second time unit includes 1000 first time units.

In the 1 st ms:

the clipping factor for carrier signal 1 is:

the clipping factor for carrier signal 2 is:

the clipping factor for the carrier signal 3 is:

the clipping factor for the carrier signal 4 is:

at the 2 nd ms:

the clipping factor for carrier signal 1 is:

the clipping factor for carrier signal 2 is:

the clipping factor for the carrier signal 3 is:

the clipping factor for the carrier signal 4 is:

……

at the t ms:

the clipping factor for carrier signal 1 is:

the clipping factor for carrier signal 2 is:

the clipping factor for the carrier signal 3 is:

the clipping factor for the carrier signal 4 is:

……

as an implementation method, the second clipping factors respectively corresponding to the plurality of carrier signals in the second time unit may be determined by the radio frequency unit and sent to the baseband unit before the step 401.

The second clipping factor of the radio frequency unit may be determined from the set of scheduling information of the multi-carrier signal, e.g. from clipping factor statistics (e.g. mean average), or extreme values (e.g. maximum) determined from sets of scheduling information of the multi-carrier signal.

It is to be understood that the scheduling information set of the multi-carrier signal may be a scheduling information set in the second time unit, or may be a scheduling information set in a time period before the second time unit, for example, may be a scheduling information set of the carrier signal in a third time unit, where the third time unit is earlier in time sequence than the second time unit.

Illustratively, the radio frequency unit obtains a scheduling information set corresponding to a second time unit that is pre-sent, the second time unit includes a plurality of first time units, and the radio frequency unit determines statistical values or extreme values of clipping factors corresponding to the plurality of first time units according to the scheduling information corresponding to the plurality of first time units as a second clipping factor corresponding to the carrier signal in the second time unit.

For example, the radio frequency unit may determine a second clipping factor corresponding to each carrier signal in the second time unit according to a plurality of third clipping factors corresponding to the carrier signal in the third time unit. Wherein the third time unit is earlier in time sequence than the second time unit. For example, the radio frequency unit determines an average value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit as a second clipping factor corresponding to the carrier signal in a second time unit. For another example, the radio frequency unit determines a maximum value of a plurality of third clipping factors corresponding to each carrier signal in the third time unit as a second clipping factor corresponding to the carrier signal in the second time unit.

The following description is made with reference to a specific example. Referring to fig. 5, a relationship between the second time unit and the third time unit is schematically illustrated. The second time unit is 1s and the third time unit is 1s before the second time unit. The third time unit comprises a fourth time unit, which is 1ms, i.e. the third time unit comprises 1000 fourth time units. Each of the n carrier signals corresponds to 1000 third clipping factors in a third time unit. For example, the second clipping factor corresponding to the 1 st carrier signal in the second time unit is determined to be equal to the average of the 1000 third clipping factors corresponding to the 1 st carrier signal in the third time unit, the second clipping factor corresponding to the 2 nd carrier signal in the second time unit is determined to be equal to the average of the 1000 third clipping factors corresponding to the 2 nd carrier signal in the third time unit, and so on. For another example, it is determined that the second clipping factor corresponding to the 1 st carrier signal in the second time unit is equal to the maximum of the 1000 third clipping factors corresponding to the 1 st carrier signal in the third time unit, it is determined that the second clipping factor corresponding to the 2 nd carrier signal in the second time unit is equal to the maximum of the 1000 third clipping factors corresponding to the 2 nd carrier signal in the third time unit, and so on.

As another implementation method, the second clipping factors respectively corresponding to the plurality of carrier signals in the second time unit may also be determined by the baseband unit and sent to the radio frequency unit before the step 404. For example, the baseband unit may determine a second clipping factor corresponding to each carrier signal in the second time unit according to a plurality of third clipping factors corresponding to the carrier signal in the third time unit. Wherein the third time unit is earlier in time sequence than the second time unit. For example, the baseband unit determines an average value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit as a second clipping factor corresponding to the carrier signal in a second time unit. For another example, the baseband unit determines a maximum value of a plurality of third clipping factors corresponding to each carrier signal in the third time unit as a second clipping factor corresponding to the carrier signal in the second time unit.

Step 402, the baseband unit separately clips the plurality of carrier signals according to the first clipping factors respectively corresponding to the plurality of carrier signals in the first time unit.

It should be noted that the first clipping factors respectively corresponding to different carrier signals in the first time unit may be the same or different.

Specifically, the baseband unit performs clipping processing on each carrier signal individually according to a first clipping factor corresponding to each carrier signal in the first time unit. For example, if there are n carrier signals, the 1 st carrier signal is clipped according to the first clipping factor corresponding to the 1 st carrier signal, the 2 nd carrier signal is clipped according to the first clipping factor corresponding to the 2 nd carrier signal, and so on.

For example, the baseband signals of each carrier in the multi-carrier may be generated in different baseband subunits, and performing the clipping processing on each carrier signal separately may be understood as each baseband subunit performing the independent clipping processing on the signal of the corresponding single carrier.

When each baseband subunit independently clips the signal corresponding to the single carrier, the clipping factor can be determined by considering the scheduling information of other carriers in the multiple carriers, so that the joint optimization of the clipping factor is ensured to a certain extent; then considering the clipping effect of the radio frequency side to the multi-carrier combined signal, when each baseband subunit carries out independent clipping to the signal of the corresponding single carrier, the clipping factor determination of the baseband subunits can also consider the clipping factor of the radio frequency side to the multi-carrier combined signal, and further realize the combined optimization of multi-carrier and multi-level clipping.

It is easy to understand that, in the above step 401 and step 402, the independent clipping is performed on a single carrier in the multiple carrier signals in the primary clipping of the baseband unit, which may be applicable to a scenario where the clipping performed on the combined signal of multiple carriers at the baseband side may cause a large time delay.

In a possible implementation, the baseband unit may also perform clipping processing on a combined signal of multiple carrier signals. The method for determining the clipping factor corresponding to the combined signal and applying the clipping factor may refer to the specific implementation, which may refer to the related descriptions in step 201 and step 202, except that the baseband unit applies the clipping factor to perform the clipping processing.

In step 403, the baseband unit sends the multiple carrier signals after clipping processing to the radio frequency unit. Accordingly, the radio frequency unit receives a plurality of carrier signals after the clipping processing.

In step 404, the radio frequency unit performs clipping processing on the combined signal of the plurality of carrier signals after clipping processing according to second clipping factors respectively corresponding to the plurality of carrier signals in a second time unit.

That is, the second clipping factor is used to clip the combined signal of the plurality of carrier signals clipped in step 402.

The specific implementation method for the radio frequency unit to perform the clipping processing on the combined signal of the clipped multiple carrier signals may refer to the foregoing description, and is not described here again.

According to the scheme, the baseband unit determines first clipping factors respectively corresponding to a plurality of carrier signals in the first time unit, each carrier signal is subjected to independent primary clipping processing based on the first clipping factors respectively corresponding to the plurality of carrier signals in the first time unit, then the carrier signals subjected to primary clipping are sent to the radio frequency unit, and the radio frequency unit performs secondary clipping processing on combined signals of the clipped carrier signals based on the second clipping factors to obtain secondary clipped carrier signals. By adopting a clipping factor interaction mode, when the clipping factor is determined, not only the scheduling information of a plurality of carrier signals is considered, but also the coupling of multi-level clipping factors is considered, so that the clipping pretreatment (such as single carrier clipping) and the clipping of a combined signal of the plurality of carrier signals are coupled, and the clipping performance is further improved. In addition, the multi-stage clipping scheme can be independent of the reliability guarantee requirement of transmission of an intermediate interface between the baseband unit and the radio frequency unit, so that the multi-stage clipping scheme is more flexible to use. It is to be understood that the multi-stage clipping scheme is not limited to employ transmission reliability verification of the interface, for example, the transmission reliability verification of the interface is performed on the multi-stage clipping scheme, and the specific implementation can refer to the related description of the method 300 about the transmission reliability verification of the interface.

Referring to fig. 6, a corresponding timing operation diagram is shown. At time t1, the video unit determines second clipping factors corresponding to the plurality of carrier signals respectively in the second time unit, and sends the second clipping factors corresponding to the plurality of carrier signals respectively in the second time unit to the baseband unit. At time t2, the baseband unit determines first clipping factors corresponding to the plurality of carrier signals in the first time unit according to the second clipping factors corresponding to the plurality of received carrier signals in the second time unit and the scheduling information corresponding to the plurality of received carrier signals in the first time unit. At time t3, the baseband unit performs a first clipping process (also referred to as a first-stage clipping process) on each carrier signal according to a first clipping factor corresponding to the carrier signal in a first time unit, and then sends the clipped carrier signals to the radio frequency unit. At time t4, the rf unit receives the multiple carrier signals after clipping processing, and then performs a second clipping processing (also referred to as a second-level clipping processing) on the combined signal of the multiple carrier signals after clipping processing according to second clipping factors respectively corresponding to the multiple carrier signals in a second time unit.

In the above example, the radio frequency unit determines the second clipping factors corresponding to the plurality of carrier signals in the second time unit, and sends the second clipping factors corresponding to the plurality of carrier signals in the second time unit to the baseband unit. In another implementation method, the baseband unit may determine second clipping factors corresponding to the plurality of carrier signals in the second time unit, and then send the second clipping factors corresponding to the plurality of carrier signals in the second time unit to the radio frequency unit. Of course, the baseband unit and the radio frequency unit may respectively determine, by themselves, second clipping factors corresponding to the plurality of carrier signals in the second time unit, and the second clipping factors determined by the baseband unit and the radio frequency unit are the same. For example, the baseband unit and the radio frequency unit may determine the second clipping factor according to the same method for determining the clipping factor, respectively, so that the determined second clipping factors are the same, such as: and determining a second clipping factor corresponding to each carrier signal in the second time unit according to a plurality of third clipping factors corresponding to each carrier signal in the third time unit. Wherein the third time unit is earlier in time sequence than the second time unit. Illustratively, the baseband unit and the radio frequency unit respectively determine an average value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit as a second clipping factor corresponding to the carrier signal in a second time unit. Illustratively, the baseband unit and the radio frequency unit respectively determine a maximum value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit as a corresponding second clipping factor of the carrier signal in a second time unit.

The third implementation method and the fourth implementation method described above are described in detail. For the first implementation method and the second implementation method, the specific implementation process is similar to that of the third implementation method, and the difference is that: the clipping factor and/or the execution subject of the clipping process differ. In the first implementation method, the baseband unit determines a clipping factor, and the baseband unit performs clipping processing based on the clipping factor. In the second implementation method, the rf unit determines a clipping factor, and the rf unit performs clipping processing based on the clipping factor. For the third implementation method, the baseband unit determines a clipping factor, and the rf unit performs clipping processing based on the clipping factor.

For example, when the power of the radio frequency unit is limited, the clipping process may be implemented by the first implementation method or the third implementation method. When the calculation power of the radio frequency unit is sufficient, the clipping processing may be implemented by the second implementation method, and of course, the clipping processing may also be implemented by the first implementation method or the third implementation method.

To further improve the problem of communication performance degradation caused by clipping multiple carrier signals, the multiple carrier signals may also be preprocessed by the baseband unit prior to clipping. It should be noted that the following embodiment corresponding to fig. 7 may be implemented alone, or may be implemented in combination with any foregoing carrier signal processing method (for example, the foregoing first implementation method, the foregoing second implementation method, the foregoing third implementation method, the foregoing fourth implementation method, or another implementation method).

Fig. 7 is a schematic diagram illustrating another carrier signal processing method according to an embodiment of the present application. It should be noted that the method of this embodiment may be performed by a baseband unit, or may be performed by a plurality of baseband sub-units in the baseband unit in combination.

The method comprises the following steps:

in step 701, a baseband unit determines peak-to-valley information of a plurality of carrier signals in a time domain.

The peak-valley information of one carrier signal in the time domain is used for indicating the peak information and/or the valley information of the carrier signal in the time domain. That is, the peak-valley information includes peak information and/or valley information.

For example, for a carrier signal, the baseband unit determines, from all sampling information of the carrier signal in the time domain, information of a sample sequence whose amplitude exceeds a certain threshold, including a sample number and phase information. If the phase of a sample in the sample sequence is positive, the sample is a peak sample, and the peak information of the carrier signal in the time domain may include information of the peak sample. If the phase of a sample in the sample sequence is negative and the sample is a valley sample, the valley information of the carrier signal in the time domain may include information of the valley sample.

It is easy to understand that the baseband signal corresponding to each carrier (corresponding to one carrier signal) may be processed by a separate baseband subunit, and the above baseband unit determines the peak-valley information of the multiple carrier signals in the time domain. For example, the baseband unit shares the peak-valley information of the time-domain signal of the carrier corresponding to the multiple subunits, so as to ensure that the first baseband subunit in the baseband unit obtains the peak-valley information of the time-domain signal of the carrier corresponding to the second baseband subunit in the baseband unit.

In step 702, the baseband unit determines, according to peak-to-valley information of the multiple carrier signals in the time domain, offsets of the multiple carrier signals in the time domain.

It is easy to understand that the offset of each carrier signal in the time domain can be processed by a separate baseband subunit, and the above-mentioned baseband unit determines the offset of multiple carrier signals in the time domain.

As an implementation method, one carrier signal is selected from a plurality of carrier signals as a reference carrier signal, and a baseband subunit corresponding to the reference carrier signal can share peak-valley information of the reference carrier signal to other baseband subunits, so that other baseband subunits can determine, according to the peak-valley information of the reference carrier signal, an offset of a carrier signal (also referred to as a non-reference carrier signal) corresponding to the baseband subunit relative to the reference carrier signal in a time domain. The offset in the time domain refers to introducing an extra delay amount (i.e., offset) on the non-reference carrier signal relative to the reference carrier signal, and performing time domain cyclic shift on the non-reference carrier signal. Based on the method, wave crest superposition and/or wave trough superposition do not exist between the non-reference carrier signal and the reference carrier signal, or the wave crest superposition and/or the wave trough superposition are reduced, so that the safety of carrier signal transmission is guaranteed.

For example, there are 5 baseband subunits, respectively denoted as: baseband sub-unit 1 (corresponding to carrier signal 1), baseband sub-unit 2 (corresponding to carrier signal 2), baseband sub-unit 3 (corresponding to carrier signal 3), baseband sub-unit 4 (corresponding to carrier signal 4), and baseband sub-unit 5 (corresponding to carrier signal 5). Assuming that the carrier signal 1 is selected as the reference carrier signal, the carrier signals 2 to 5 are non-reference carrier signals. The baseband sub-unit 1 shares the peak-valley information of the carrier signal 1 with the baseband sub-units 2 to 5, then the baseband sub-unit 2 may determine the offset of the carrier signal 2 relative to the carrier signal 1 according to the peak-valley information of the carrier signal 1 and the peak-valley information of the carrier signal 2, the baseband sub-unit 3 may determine the offset of the carrier signal 3 relative to the carrier signal 1 according to the peak-valley information of the carrier signal 1 and the peak-valley information of the carrier signal 3, the baseband sub-unit 4 may determine the offset of the carrier signal 4 relative to the carrier signal 1 according to the peak-valley information of the carrier signal 1 and the peak-valley information of the carrier signal 4, and the baseband sub-unit 5 may determine the offset of the carrier signal 5 relative to the carrier signal 1 according to the peak-valley information of the carrier signal 1 and the peak-valley information of the carrier signal 5. The method can reduce peak-valley superposition among carrier signals to a certain extent, simultaneously reduce information interaction among the baseband subunits as much as possible, and ensure the safety of carrier signal transmission on the basis of not increasing the overhead of information interaction among the baseband subunits.

The method for determining the time domain offset may be based on a predefined rule, for example, by table lookup or by function calculation. And each baseband subunit sends the carrier signal to the radio frequency module according to the offset of the carrier signal in the time domain.

Exemplarily, taking carrier signal 1 and carrier signal 2 as an example, when there is no offset, carrier signal 1 is characterized in the time domain as: x (0), x (1), …, x (N-1), the carrier signal 2 is characterized in the time domain as: y (0), y (1), …, y (N-1), where N is the sample index value, i.e., the nth sample value, and N is the number of samples. Taking carrier signal 1 as a reference carrier signal, if the offset is 1, carrier signal 2 becomes: y (n-1), y (0), y (1), …, y (n-2). Similarly, if the offset is m, the carrier signal 2 becomes, by cyclic shift, in the time domain: y (n-m), …, y (n-1), y (0), y (1), …, y (n-m-1).

In step 703, the baseband unit determines the adjusted multiple carrier signals according to the offsets of the multiple carrier signals in the time domain.

It is to be understood that each adjusted carrier signal may be processed by a separate baseband subunit, and the determining of the adjusted carrier signals by the baseband unit may be understood as each baseband subunit determining the adjusted carrier signals.

And after offset adjustment is carried out on one or more carrier signals in the plurality of carrier signals on a time domain, a plurality of adjusted carrier signals are obtained. In one possible implementation, determining the adjusted at least two carrier signals includes reducing a peak superposition and/or a trough superposition of the at least two carrier signals. It can be understood that PAPR is reduced to achieve relative shift of time domain signals among multiple carriers.

As an implementation method, the peak superposition between the adjusted plurality of carrier signals is reduced or decreased compared to the peak superposition between the plurality of carrier signals before the adjustment.

As an implementation method, the valley superposition among the adjusted carrier signals is reduced or decreased compared to the valley superposition among the carrier signals before adjustment.

Wherein a peak stack may be understood as a peak alignment, or a peak overlap, and similarly a valley stack may be understood as a valley alignment, or a valley overlap.

Step 704, the baseband unit sends the adjusted multiple carrier signals to the rf unit.

It is easy to understand that each adjusted carrier signal may be sent by an independent baseband subunit, and the above-mentioned baseband unit sending the adjusted multiple carrier signals to the radio frequency unit may be understood as that each baseband subunit sends an adjusted carrier signal to the radio frequency unit, respectively.

According to the scheme, the base band unit can realize reduction of the PAPR based on relative displacement of the plurality of carrier signals in the time domain, so that the PAPR of the combined signal of the plurality of carrier signals can be reduced. And when the scheme is combined with any carrier signal processing method, the pretreatment of the carrier signal can be realized before the clipping, so that the problem of communication performance reduction caused by the clipping of a plurality of carrier signals can be further improved.

Fig. 8 is a schematic diagram of a communication device according to an embodiment of the present application. The apparatus is configured to implement the steps performed by the corresponding baseband unit or radio frequency unit in the foregoing embodiments, as shown in fig. 8, the apparatus 800 includes a transceiver unit 810 and a processing unit 820.

In a first embodiment, the communication device is a baseband unit or a chip for a baseband unit, then:

a processing unit 820, configured to determine clipping factors corresponding to at least two carrier signals in a first time unit according to scheduling information corresponding to the at least two carrier signals in the first time unit, respectively; the transceiver 810 is configured to send the at least two carrier signals and clipping factors respectively corresponding to the at least two carrier signals in a first time unit to a radio frequency unit, where the clipping factors respectively corresponding to the at least two carrier signals in the first time unit are used for clipping a combined signal of the at least two carrier signals.

In a possible implementation method, the processing unit 820 is specifically configured to determine a reference carrier signal in the at least two carrier signals; and determining a clipping factor corresponding to each carrier signal according to scheduling information corresponding to each carrier signal in the at least two carrier signals in the first time unit and scheduling information corresponding to the reference carrier signal in the first time unit.

In one possible implementation, F_i＝P_j/P_i(ii) a Wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of the ith carrier signal in the first time unit_jRepresents the power of the jth carrier signal in the first time unit, the jth carrier signal is a reference carrier signal, the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

In one possible implementation of the method according to the invention,

wherein, F_iRepresents a corresponding clipping factor, EVM, of an ith carrier signal of the at least two carrier signals within the first time unit_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jIndicating that the modulation order of the jth carrier signal in the first time unit corresponds toAn Error Vector Magnitude (EVM) threshold, wherein the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

In one possible implementation of the method according to the invention,

wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of the ith carrier signal in the first time unit_jRepresenting the power, EVM, of the jth carrier signal in said first time unit_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the jth carrier signal in the first time unit is represented, and the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

In a second embodiment, the communication device is a radio frequency unit or a chip for a radio frequency unit, then:

a transceiver 810, configured to receive at least two carrier signals from a baseband unit and corresponding clipping factors of the at least two carrier signals in a first time unit, where the corresponding clipping factors of the at least two carrier signals in the first time unit correspond to scheduling information of the at least two carrier signals in the first time unit; a processing unit 820, configured to perform clipping processing on a combined signal of the at least two carrier signals according to clipping factors respectively corresponding to the at least two carrier signals in a first time unit.

In a possible implementation method, the processing unit 820 is further configured to determine that transmission of the clipping factor is reliable before performing clipping processing on a combined signal of the at least two carrier signals according to the clipping factors respectively corresponding to the at least two carrier signals in the first time unit.

In one possible implementation of the method according to the invention,

wherein, F_iRepresents a corresponding clipping factor, EVM, of an ith carrier signal of the at least two carrier signals within the first time unit_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jRepresenting an Error Vector Magnitude (EVM) threshold corresponding to a modulation order of a jth carrier signal in the first time unit, wherein the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

In one possible implementation of the method according to the invention,

wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of the ith carrier signal in the first time unit_jIndicating that the jth carrier signal is in saidPower in the first time unit, EVM_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jRepresenting an Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the jth carrier signal in the first time unit, wherein the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

In a third embodiment, the communication device is a baseband unit or a chip for a baseband unit, then:

a processing unit 820, configured to determine first clipping factors respectively corresponding to at least two carrier signals in a first time unit according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit and second clipping factors respectively corresponding to the at least two carrier signals in a second time unit, where the first time unit is included in the second time unit; according to first clipping factors respectively corresponding to the at least two carrier signals in a first time unit, respectively carrying out independent clipping processing on each carrier signal of the at least two carrier signals; a transceiver unit 810, configured to send at least two carrier signals after clipping processing to a radio frequency unit; the second clipping factor is used for clipping the combined signal of the at least two carrier signals after clipping processing.

In a possible implementation method, the processing unit 820 is configured to determine, according to scheduling information corresponding to at least two carrier signals in a first time unit and second clipping factors corresponding to the at least two carrier signals in a second time unit, first clipping factors corresponding to the at least two carrier signals in the first time unit, and specifically includes: for determining a reference carrier signal of the at least two carrier signals; the method comprises determining a first clipping factor corresponding to each of the at least two carrier signals according to scheduling information corresponding to each of the at least two carrier signals in the first time unit, scheduling information corresponding to the reference carrier signal in the first time unit, and second clipping factors corresponding to the at least two carrier signals in the second time unit.

In a possible implementation method, the transceiver unit 810 is further configured to receive second clipping factors corresponding to the at least two carrier signals from the radio frequency unit in a second time unit.

In a possible implementation method, the processing unit 820 is further configured to determine a second clipping factor corresponding to each carrier signal in the second time unit.

In a possible implementation method, the processing unit 820 is configured to determine a second clipping factor corresponding to each carrier signal in the second time unit, and specifically includes: for determining a second clipping factor corresponding to each of the at least two carrier signals in the second time unit according to a plurality of third clipping factors corresponding to each of the at least two carrier signals in a third time unit, which is earlier in time sequence than the second time unit.

In a possible implementation method, the transceiver unit 810 is further configured to send, to the radio frequency unit, second clipping factors corresponding to the at least two carrier signals respectively in a second time unit.

In a possible implementation method, the second time unit includes m first time units, and the number of the at least two carrier signals is n;

representing the power of the ith carrier signal in a jth first one of the second time units,

represents the power of a kth carrier signal within a jth first time unit of the second time units, the kth carrier signal being a reference carrier signal, and i ═ 1, 2, … …, n, j ═ 1, 2, … …, m.

wherein the content of the first and second substances,

indicating that said ith carrier signal is in saidAn EVM threshold corresponding to the modulation order in the jth first time unit in the second time unit,

and indicating an EVM threshold corresponding to a modulation order of a k-th carrier signal in a j-th first time unit of the second time units, where the k-th carrier signal is a reference carrier signal, and i is 1, 2, … …, n, j is 1, 2, … …, m.

wherein the content of the first and second substances,

represents a jth first time of the ith carrier signal in the second time unitThe EVM threshold corresponding to the modulation order in the cell,

In a fourth embodiment, the communication device is a radio frequency unit or a chip for a radio frequency unit, then:

a transceiver 810, configured to receive at least two carrier signals subjected to clipping processing by a baseband unit, where the at least two carrier signals subjected to clipping processing are carrier signals subjected to separate clipping processing by using first clipping factors respectively corresponding to the at least two carrier signals in a first time unit, the first clipping factors are determined according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit and second clipping factors respectively corresponding to the at least two carrier signals in a second time unit, and the first time unit is included in the second time unit; a processing unit 820, configured to perform clipping processing on the combined signal of the at least two carrier signals after the clipping processing according to second clipping factors respectively corresponding to the at least two carrier signals in the second time unit.

In one possible implementation, the processing unit 820 is further configured to determine a second clipping factor corresponding to each carrier signal in the second time unit.

In a possible implementation method, the processing unit 820 is configured to determine a second clipping factor corresponding to each carrier signal in the second time unit, and specifically includes: the clipping factor determining unit is configured to determine, as a corresponding second clipping factor of each carrier signal of the at least two carrier signals in the second time unit, an average value or a maximum value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit, the third time unit being earlier in time sequence than the second time unit.

In a possible implementation method, the transceiver unit 810 is further configured to send, to the baseband unit, second clipping factors corresponding to the at least two carrier signals respectively in a second time unit before receiving the at least two carrier signals subjected to clipping processing by the baseband unit.

In a possible implementation method, the transceiver unit 810 is further configured to receive second clipping factors corresponding to the at least two carrier signals from the baseband unit in a second time unit.

wherein the content of the first and second substances,

wherein the content of the first and second substances,

an EVM threshold corresponding to a modulation order of the ith carrier signal in a jth first time unit of the second time units,

wherein the content of the first and second substances,

In a fifth embodiment, the communication device is a baseband unit or a chip for a baseband unit, then:

a processing unit 820, configured to determine peak-valley information of at least two carrier signals in a time domain, where the peak-valley information includes peak information and/or valley information; determining the offset of the at least two carrier signals in the time domain according to the peak-valley information of the at least two carrier signals in the time domain; determining at least two adjusted carrier signals according to the offset of the at least two carrier signals in the time domain; the transceiver 810 is configured to send the adjusted at least two carrier signals to the radio frequency unit.

In a possible implementation method, the peak superposition and/or the trough superposition are not present or reduced for any two carrier signals of the adjusted at least two carrier signals.

In a possible implementation method, the processing unit 820 is configured to determine, according to peak-to-valley information of the at least two carrier signals in a time domain, an offset of the at least two carrier signals in the time domain, and specifically includes: for determining a reference carrier signal of the at least two carrier signals; and the offset of the non-reference carrier signal in the at least two carrier signals relative to the reference carrier signal in the time domain is determined according to the peak-valley information of the reference carrier signal.

Optionally, the communication device 800 may further include a storage unit, which is used for storing data or instructions (also referred to as codes or programs), and the above units may interact with or be coupled to the storage unit to implement corresponding methods or functions. For example, the processing unit 820 may read data or instructions in the storage unit, so that the communication device implements the method in the above embodiment.

It should be understood that the division of the units in the above apparatus is only a division of logical functions, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And the units in the device can be realized in the form of software called by the processing element; or may be implemented entirely in hardware; part of the units can also be implemented in the form of software invoked by a processing element and part of the units can be implemented in the form of hardware. For example, each unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory in the form of a program, and a function of the unit may be called and executed by a processing element of the apparatus. In addition, all or part of the units can be integrated together or can be independently realized. The processing element described herein may in turn be a processor, which may be an integrated circuit having signal processing capabilities. In the implementation process, the steps of the method or the units above may be implemented by integrated logic circuits of hardware in a processor element or in a form called by software through the processor element.

In one example, the units in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), or a combination of at least two of these integrated circuit forms. As another example, when a unit in a device may be implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of invoking programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above transceiving unit 810 is an interface circuit of the device for receiving signals from or transmitting signals to other devices. For example, when the device is implemented in the form of a chip, the transceiving unit 810 is an interface circuit for the chip to receive signals from other chips or devices, or an interface circuit to transmit signals to other chips or devices.

Referring to fig. 9, a schematic diagram of a communication device provided in an embodiment of the present application is used to implement operations of a baseband unit or a radio frequency unit in the above embodiments. As shown in fig. 9, the communication apparatus includes: a processor 910 and an interface 930. optionally, the communication device also includes a memory 920. The interface 930 is used to enable communication with other devices.

The method executed by the baseband unit or the radio frequency unit in the above embodiments may be implemented by the processor 910 calling a program stored in a memory (which may be the memory 920 in the baseband unit or the radio frequency unit, or may be an external memory). That is, the baseband unit or the radio frequency unit may include the processor 910, and the processor 910 may execute the method performed by the baseband unit or the radio frequency unit in the above method embodiment by calling the program in the memory. The processor here may be an integrated circuit with signal processing capabilities, such as a CPU. The baseband unit or the radio frequency unit may be implemented by one or more integrated circuits configured to implement the above method. For example: one or more ASICs, or one or more microprocessors DSP, or one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Alternatively, the above implementations may be combined.

In particular, the functions/implementation procedures of the transceiving unit 810 and the processing unit 820 in fig. 8 may be implemented by the processor 910 in the communication device 900 shown in fig. 9 calling the computer executable instructions stored in the memory 920. Alternatively, the function/implementation procedure of the processing unit 820 in fig. 8 may be implemented by the processor 910 in the communication apparatus 900 shown in fig. 9 calling a computer executing instruction stored in the memory 920, and the function/implementation procedure of the transceiving unit 810 in fig. 8 may be implemented by the interface 930 in the communication apparatus 900 shown in fig. 9.

Those of ordinary skill in the art will understand that: various numbers of the first, second, etc. mentioned in this application are only for convenience of description and distinction, and are not used to limit the scope of the embodiments of this application, and also represent a sequence order. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one" means one or more. At least two means two or more. "at least one," "any," or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one (one ) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. "plurality" means two or more, and other terms are analogous.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In an implementation method, an embodiment of the present application provides a communication apparatus, which may be a baseband unit and may also be a chip for the baseband unit. The apparatus has the function of implementing the baseband unit in any of the embodiments described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In an implementation method, an embodiment of the present application provides a communication device, which may be a radio frequency unit and may also be a chip for the radio frequency unit. The device has the function of implementing the radio frequency unit in any of the embodiments described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one implementation, an embodiment of the present application provides a communication apparatus, including a processor and a memory; the memory is used for storing computer executable instructions, and when the device runs, the processor executes the computer executable instructions stored by the memory, so that the device executes the method executed by the baseband unit in any embodiment.

In one implementation, an embodiment of the present application provides a communication apparatus, including a processor and a memory; the memory is used for storing computer-executable instructions, and when the device runs, the processor executes the computer-executable instructions stored in the memory, so that the device executes the method executed by the radio frequency unit in any embodiment.

In one implementation, the present embodiments provide a communication device including a unit or means for performing the steps of the method performed by the baseband unit in any of the above embodiments.

In one implementation, the present application provides a communication device, which includes a unit or means for performing the steps of the method performed by the radio frequency unit in any of the above embodiments.

In one implementation, the present application provides a communication device, which includes a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and to perform the method performed by the baseband unit in any of the above embodiments. The processor includes one or more.

In one implementation, the present application provides a communication device, which includes a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and to perform the method performed by the radio frequency unit in any of the above embodiments. The processor includes one or more.

In one implementation method, an embodiment of the present application provides a communication device, including a processor, connected to a memory, and configured to call a program stored in the memory to perform a method performed by a baseband unit in any of the foregoing embodiments. The memory may be located within the device or external to the device. And the processor includes one or more.

In an implementation method, an embodiment of the present application provides a communication apparatus, including a processor, connected to a memory, and configured to call a program stored in the memory to perform a method performed by a radio frequency unit in any of the above embodiments. The memory may be located within the device or external to the device. And the processor includes one or more.

In one implementation, the present application further provides a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the method in any of the above embodiments to be performed.

In one implementation method, the present application further provides a computer program product including a computer program, which when executed, causes the method in any of the above embodiments to be performed.

In an implementation method, an embodiment of the present application further provides a chip system, including: a processor configured to perform the method performed by the baseband unit in any of the embodiments described above.

In an implementation method, an embodiment of the present application further provides a chip system, including: a processor configured to perform the method performed by the radio frequency unit in any of the above embodiments.

In an implementation method, an embodiment of the present application further provides a communication system, which includes the baseband unit in the method according to any of the above embodiments and/or the radio frequency unit in the method according to any of the above embodiments.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The various illustrative logical units and circuits described in this application may be implemented or operated upon by design of a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in the embodiments herein may be embodied directly in hardware, in a software element executed by a processor, or in a combination of the two. The software cells may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), EPROM Memory, EEPROM Memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one or more exemplary designs, the functions described herein may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media that facilitate transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media can comprise, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program code in the form of instructions or data structures and that can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Additionally, any connection is properly termed a computer-readable medium, and, thus, is included if the software is transmitted from a website, server, or other remote source over a coaxial cable, fiber optic computer, twisted pair, Digital Subscriber Line (DSL), or wirelessly, e.g., infrared, radio, and microwave. The disk (disk) and Disc (Disc) include compact Disc, laser Disc, optical Disc, Digital Versatile Disc (DVD), floppy disk and blu-ray Disc, where the disk usually reproduces data magnetically, and the Disc usually reproduces data optically with laser. Combinations of the above may also be included in the computer-readable medium.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application. The foregoing description of the specification may enable any person skilled in the art to make or use the teachings of the present application, and any modifications based on the disclosed teachings should be considered as obvious in the art, and the general principles described herein may be applied to other variations without departing from the spirit or scope of the present application. Thus, the disclosure is not intended to be limited to the embodiments and designs described, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

1. A method for processing a carrier signal, comprising:

according to scheduling information respectively corresponding to at least two carrier signals in a first time unit, determining clipping factors respectively corresponding to the at least two carrier signals in the first time unit;

and sending the at least two carrier signals and clipping factors respectively corresponding to the at least two carrier signals in the first time unit to a radio frequency unit, wherein the clipping factors respectively corresponding to the at least two carrier signals in the first time unit are used for clipping the combined signal of the at least two carrier signals.

2. The method of claim 1, wherein the determining the clipping factors corresponding to the at least two carrier signals in the first time unit according to the scheduling information corresponding to the at least two carrier signals in the first time unit comprises:

determining a reference carrier signal of the at least two carrier signals;

and determining a clipping factor corresponding to each carrier signal in the at least two carrier signals according to scheduling information corresponding to each carrier signal in the first time unit and scheduling information corresponding to the reference carrier signal in the first time unit.

3. The method of claim 1 or 2, wherein the first time unit is a slot, a subframe, or an orthogonal frequency division multiplexing symbol.

4. The method of any of claims 1 to 3, wherein the scheduling information comprises one or more of power, modulation order, bandwidth.

5. The method of any of claims 1 to 4,

F_i＝P_j/P_i；

wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of the ith carrier signal in the first time unit_jRepresents the power of the jth carrier signal in the first time unit, the jth carrier signal is a reference carrier signal, the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

6. The method of any of claims 1 to 4,

7. The method of any of claims 1 to 4,

wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of the ith carrier signal in the first time unit_jRepresenting the jth carrier signalPower in the first time unit, EVM_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jRepresenting an Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the jth carrier signal in the first time unit, wherein the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

8. A method for processing a carrier signal, comprising:

receiving at least two carrier signals from a baseband unit and clipping factors respectively corresponding to the at least two carrier signals in a first time unit, wherein the clipping factors respectively corresponding to the at least two carrier signals in the first time unit correspond to scheduling information respectively corresponding to the at least two carrier signals in the first time unit;

and carrying out clipping processing on the combined signal of the at least two carrier signals according to clipping factors respectively corresponding to the at least two carrier signals in a first time unit.

9. The method of claim 8, wherein before performing clipping processing on the combined signal of the at least two carrier signals according to the clipping factors corresponding to the at least two carrier signals in the first time unit, the method further comprises:

determining that transmission of the clipping factor is reliable.

10. The method of claim 8 or 9, wherein the first time unit is a slot, a subframe, or an orthogonal frequency division multiplexing symbol.

11. The method according to any of claims 8 to 10, wherein said scheduling information comprises one or more of power, modulation order, bandwidth.

12. The method according to any of the claims 8 to 11,

F_i＝P_j/P_i；

13. The method according to any of the claims 8 to 11,

wherein, F_iRepresents a corresponding clipping factor, EVM, of an ith carrier signal of the at least two carrier signals within the first time unit_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit_jRepresenting an EVM threshold corresponding to a modulation order of a jth carrier signal in the first time unit, wherein the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

14. The method according to any of the claims 8 to 11,

wherein, F_iRepresents a corresponding clipping factor, Pp, of an ith carrier signal of the at least two carrier signals within the first time unit_iRepresenting the power, P, of said ith carrier signal in said first time unit_jRepresenting the power, EVM, of the jth carrier signal in said first time unit_iAn Error Vector Magnitude (EVM) threshold corresponding to a modulation order of the ith carrier signal in the first time unit is represented, and EVM_jAn EVM threshold corresponding to a modulation order of the jth carrier signal in the first time unit is represented, and the jth carrier signal is a reference carrier signal; the number of the at least two carrier signals is n, and i is 1, 2, … …, n.

15. A method for processing a carrier signal, comprising:

determining first clipping factors respectively corresponding to at least two carrier signals in a first time unit according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit and second clipping factors respectively corresponding to the at least two carrier signals in a second time unit, wherein the first time unit is included in the second time unit;

according to first clipping factors respectively corresponding to the at least two carrier signals in a first time unit, respectively carrying out independent clipping processing on each carrier signal of the at least two carrier signals;

sending the at least two carrier signals subjected to the clipping treatment to a radio frequency unit;

the second clipping factor is used for clipping the combined signal of the at least two carrier signals after clipping processing.

16. The method of claim 15, wherein determining the first clipping factor for the at least two carrier signals in the first time unit according to the scheduling information for the at least two carrier signals in the first time unit and the second clipping factor for the at least two carrier signals in the second time unit comprises:

determining a reference carrier signal of the at least two carrier signals;

and determining a first clipping factor corresponding to each carrier signal according to scheduling information corresponding to each carrier signal in the at least two carrier signals in the first time unit, scheduling information corresponding to the reference carrier signal in the first time unit, and second clipping factors corresponding to the at least two carrier signals in a second time unit.

17. The method of claim 15 or 16, further comprising:

and receiving second clipping factors respectively corresponding to the at least two carrier signals in a second time unit from the radio frequency unit.

18. The method of claim 15 or 16, further comprising:

determining the second clipping factor for each of the carrier signals corresponding to the second time unit.

19. The method of claim 18, wherein said determining a corresponding second clipping factor for said each carrier signal in said second time unit comprises:

and determining a second clipping factor corresponding to each carrier signal in the second time unit according to a plurality of third clipping factors corresponding to each carrier signal in a third time unit in the at least two carrier signals, wherein the third time unit is earlier in time sequence than the second time unit.

20. The method of claim 18 or 19, further comprising:

and sending second clipping factors respectively corresponding to the at least two carrier signals in a second time unit to the radio frequency unit.

21. The method according to one of claims 15 to 20, wherein the first time unit is a slot, a subframe or an orthogonal frequency division multiplexing symbol.

22. The method of any of claims 15 to 21, wherein the scheduling information comprises at least one of power, modulation order, bandwidth.

23. A method according to any one of claims 15 to 22, wherein said second time unit comprises m of said first time units, the number of said at least two carrier signals being n;

24. A method according to any one of claims 15 to 22, wherein said second time unit comprises m of said first time units, the number of said at least two carrier signals being n;

wherein the content of the first and second substances,

25. A method according to any one of claims 15 to 22, wherein said second time unit comprises m of said first time units, the number of said at least two carrier signals being n;

wherein the content of the first and second substances,

26. A method for processing a carrier signal, comprising:

receiving at least two carrier signals subjected to clipping processing by a baseband unit, wherein the at least two carrier signals subjected to clipping processing are carrier signals subjected to independent clipping processing by using first clipping factors respectively corresponding to the at least two carrier signals in a first time unit, the first clipping factors are determined according to scheduling information respectively corresponding to the at least two carrier signals in the first time unit and second clipping factors respectively corresponding to the at least two carrier signals in a second time unit, and the first time unit is included in the second time unit;

and according to second clipping factors respectively corresponding to the at least two carrier signals in the second time unit, carrying out clipping processing on the combined signal of the at least two carrier signals after clipping processing.

27. The method of claim 26, further comprising:

determining a corresponding second clipping factor for said each carrier signal in said second time unit.

28. The method of claim 27, wherein said determining a corresponding second clipping factor for said each carrier signal in said second time unit comprises:

determining an average value or a maximum value of a plurality of third clipping factors corresponding to each carrier signal in a third time unit of the at least two carrier signals as a corresponding second clipping factor of each carrier signal in the second time unit, wherein the third time unit is earlier in time sequence than the second time unit.

29. The method of claim 27 or 28, wherein before receiving at least two carrier signals from the baseband unit after clipping processing, further comprising:

and sending second clipping factors respectively corresponding to the at least two carrier signals in a second time unit to the baseband unit.

30. The method of claim 26, further comprising:

and receiving second clipping factors respectively corresponding to the at least two carrier signals from the baseband unit in a second time unit.

31. The method of any one of claims 26 to 30, wherein the first time unit is a slot, a subframe, or an orthogonal frequency division multiplexing symbol.

32. The method of any of claims 26 to 31, wherein the scheduling information comprises at least one of power, modulation order, bandwidth.

33. The method according to any of claims 26 to 32, wherein said second time unit comprises m of said first time units, the number of said at least two carrier signals being n;

wherein the content of the first and second substances,

representing a corresponding first clipping factor for an ith one of the at least two carrier signals within a jth one of the second time units,

representing a power of a k-th carrier signal in a j-th first time unit of the second time units, the k-th carrierThe signal is a reference carrier signal, and i is 1, 2, … …, n, j is 1, 2, … …, m.

34. The method according to any of claims 26 to 32, wherein said second time unit comprises m of said first time units, the number of said at least two carrier signals being n;

35. The method according to any of claims 26 to 32, wherein said second time unit comprises m of said first time units, the number of said at least two carrier signals being n;

wherein the content of the first and second substances,

36. A method for processing a carrier signal, comprising:

determining peak-valley information of at least two carrier signals in a time domain, wherein the peak-valley information comprises peak information and/or valley information;

determining the offset of the at least two carrier signals in the time domain according to the peak-valley information of the at least two carrier signals in the time domain;

determining at least two adjusted carrier signals according to the offset of the at least two carrier signals in the time domain;

and sending the adjusted at least two carrier signals to a radio frequency unit.

37. The method of claim 36, wherein any two of the adjusted at least two carrier signals are free of peak superposition and/or trough superposition.

38. The method of claim 36 or 37, wherein the determining the offset of the at least two carrier signals in the time domain according to the peak-to-valley information of the at least two carrier signals in the time domain comprises:

determining a reference carrier signal of the at least two carrier signals;

and determining the offset of the non-reference carrier signal in the at least two carrier signals relative to the reference carrier signal in the time domain according to the peak-valley information of the reference carrier signal.

39. A communications apparatus, comprising:

a processor, the memory coupled to the processor, the memory for storing program instructions, the processor for executing the program instructions to implement the method of any of claims 1-7, 15-25, 36-38.

40. A communications apparatus, comprising:

a processor, the memory coupled to the processor, the memory for storing program instructions, the processor for executing the program instructions to implement the method of any of claims 8-14, 26-35.

41. A communications device comprising means for performing the method of any of claims 1-7, 15-25, 36-38.

42. A communications device comprising means for performing the method of any of claims 8-14, 26-35.

43. A computer program product comprising instructions for implementing the method of any one of claims 1 to 38 when run on a computer.

44. A computer-readable storage medium having stored thereon instructions which, when executed on a computer, implement the method of any one of claims 1 to 38.

45. A communication system comprising a baseband unit for performing the method of any of the preceding claims 1 to 7 and/or a radio frequency unit for performing the method of any of the preceding claims 8 to 14.

46. A communication system comprising a baseband unit for performing the method of any of claims 15 to 25 and/or a radio frequency unit for performing the method of any of claims 26 to 35.

47. A communication system comprising a baseband unit for performing the method of any of claims 36 to 38 and/or a radio frequency unit for receiving the adjusted at least two carrier signals from the baseband unit.