WO2018098692A1

WO2018098692A1 - Method for reducing papr of wireless signals and related device

Info

Publication number: WO2018098692A1
Application number: PCT/CN2016/108043
Authority: WO
Inventors: 陈曦; 邹志强
Original assignee: 华为技术有限公司
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2018-06-07

Abstract

The present application relates to the technical field of network communications, in particular to a method for reducing the PAPR of wireless signals, as well as related devices. The method comprises: sending a first message, the first message comprising PAPR control information, the PAPR control information comprising parameter information which is used by a mobile terminal to reduce the PAPR of a wireless signal transmitted thereby; receiving the wireless signal from the mobile terminal, the wireless signal being a wireless signal after PAPR reduction processing is carried out by the mobile terminal according to the PAPR control information. The first message in the present application carries the parameter information which is used by the mobile terminal to reduce the PAPR of the wireless signal transmitted thereby, thus allowing the wireless signal of the mobile terminal to have a higher EVM after the PAPR reduction processing. With knowledge of the parameter information which is used by the mobile terminal to reduce the PAPR, the present application may demodulate the wireless signal transmitted by mobile terminals relatively easily, thus improving the results of reducing the PAPR of wireless signals.

Description

Method and related device for reducing PAPR of wireless signal

Technical field

The present application relates to the field of network communication technologies, and in particular, to a method and related apparatus for reducing a Peak-to-Average Power Ratio (PAPR) of a wireless signal transmitted by a mobile terminal in a mobile communication system.

Background technique

OFDM is widely used in Long Term Evolution (LTE), Worldwide Interoperability for Microwave Access (WiMAX), and wireless because of its anti-multipath fading, high spectrum utilization, and large system capacity. In wireless communication systems such as Wireless Local Area Network (WLAN) or Digital Video Broadcasting (DVB), the high PAPR of OFDM signals seriously affects the performance of mobile communication systems.

Current methods for reducing PAPR of OFDM signals include various Crest Factor Reduction (CFR) methods such as Clipping, Companding, Tone Reservation (TR), and Pre- Encoding and other methods. While reducing the PAPR of the wireless signal transmitted by the mobile terminal, it is also required to ensure that the radio frequency indicator related to the mobile terminal satisfies the requirements of the relevant protocol, wherein the relevant radio frequency indicator includes: Error Vector Magnitude (EVM), adjacent channel interference. Adjacent Channel Leakage Ratio (ACLR), In-Band Emission and Out-of-band Emission.

When the mobile terminal adopts the Clipping technology and the Companding technology to reduce the PAPR of the wireless signal transmitted by the mobile terminal, the wireless signal is distorted, resulting in the deterioration of the EVM of the wireless signal, and the mobile terminal can ensure that the wireless signal transmitted by the mobile terminal can be correctly demodulated by the base station. When performing CFR processing on a wireless signal, it is necessary to ensure that the EVM introduced by the CFR cannot exceed a certain threshold. The EVM threshold is usually set lower. For example, in an LTE system, the EVM must satisfy less than 17.5% under Quadrature Phase Shift Keying (QPSK), and 16 Quadrature Amplitude Modulation (QAM). Less than 12.5%, less than 8% at 64QAM. And for In Clipping technology, the lower the EVM, the higher the Clipping threshold, and the higher the Clipping threshold, the worse the PAPR effect of the mobile terminal reducing the wireless signal it transmits. Therefore, in the actual application process, in order to ensure that the radio frequency indicator related to the mobile terminal satisfies the requirements of the relevant protocol, the mobile terminal is limited to adopt the CFR technology to reduce the PAPR effect of the transmitted wireless signal.

Summary of the invention

In view of this, the present application provides a method for reducing PAPR of a wireless signal, and related devices to improve the effect of the mobile terminal to reduce the PAPR of the wireless signal it transmits.

To achieve the above objective, the present application provides the following technical solutions:

A first aspect of the present application provides a method of reducing PAPR of a wireless signal, comprising: transmitting a first message, the first message including PAPR control information, and the PAPR control information includes a wireless terminal for reducing wireless transmission thereof Parameter information of the PAPR of the signal; receiving a wireless signal from the mobile terminal, wherein the wireless signal is a wireless signal that is reduced by the mobile terminal according to the PAPR control information. Because the base station in the application carries the parameter information of the PAPR of the wireless signal transmitted by the mobile terminal by using the first message, thereby allowing the wireless signal of the mobile terminal to have a higher EVM after the PAPR process is reduced, because the base station knows the mobile terminal. The parameter used to reduce the PAPR is used, so that the base station can also demodulate the wireless signal transmitted by the mobile terminal relatively easily. The present application improves the effect of reducing the PAPR of the wireless signal.

In conjunction with the first aspect, in a first implementation manner of the first aspect, the parameter information includes a clipping threshold. In the embodiment of the present application, the Clipping threshold is determined by the base station and sent to the mobile terminal, so that the limitation of the EVM by the mobile terminal can be relaxed, and the threshold of the EVM is increased, thereby improving the effect of reducing the PAPR of the wireless signal. In this application, the base station does not need to estimate the Clipping threshold, which reduces the complexity of the system and the pilot overhead.

With reference to the first aspect, in a second implementation manner of the first aspect, the parameter information includes a companding Companding function parameter, or the parameter information includes a companding parameter index CPI, wherein the CPI is used to determine a Companding function. parameter. In the embodiment of the present application, the Companding function parameter or CPI is determined by the base station and sent to the mobile terminal, which improves the effect of the mobile terminal to reduce the PAPR of the transmitted signal.

In combination with the first or second implementation manner of the first aspect, in a third implementation manner of the first aspect, the parameter information is determined according to any one of the following manners or a combination of multiple manners: One or more of a modulation and coding scheme MCS, a signal to interference and noise ratio SINR, and a channel quality indicator CQI of the mobile terminal; according to a processing capability of the base station; according to a transmission power of the mobile terminal. In the embodiment of the present application, the base station may comprehensively consider various factors, such as one or more of the MCS, the SINR, or the CQI of the mobile terminal, the processing capability of the base station, and the transmit power of the mobile terminal to determine the optimal PAPR control information. Optimize system performance in different scenarios to achieve the best effect of reducing PAPR.

With reference to the first aspect, the first, the second, or the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect, the parameter information includes reserved subcarrier information, reserved The subcarrier is used by the mobile terminal to reduce the PAPR of the wireless signal. The embodiment of the present application is notified by the base station that the mobile terminal can be used to reduce the reserved subcarrier information of the PAPR, so that the mobile terminal can implement the purpose of reducing the PAPR of the mobile terminal's transmit signal by using the TR technology.

In conjunction with the fourth implementation of the first aspect, in a fifth implementation manner of the first aspect, the parameter information includes a power constraint parameter of CFR noise. The embodiment of the present application informs the mobile terminal of the power constraint parameter of the CFR noise of the mobile terminal, so that the mobile terminal uses the out-of-band frequency resource to further reduce the PAPR, and the mobile terminal has more degrees of freedom for performing CFR processing, thereby improving the effect of reducing the PAPR.

With reference to the first aspect, the implementation manner of the first, second, third, fourth or fifth aspect of the first aspect, in a sixth implementation manner of the first aspect, the first message is The radio resource controls one or more of an RRC message, a medium access control MAC message, and physical layer signaling.

A second aspect of the present application provides a method for reducing a peak-to-average power ratio PAPR of a transmitted signal, which is applied to a mobile terminal, the method comprising: receiving a first message, the first message including PAPR control information, the PAPR The control information includes parameter information of the PAPR of the wireless signal used by the mobile terminal to reduce the radio signal transmitted by the mobile terminal; and reducing the transmission of the mobile terminal by using parameter information of the PAPR of the PAPR control information for reducing the radio signal transmitted by the mobile terminal. Processing of PAPR of the wireless signal; transmitting a radio signal after the PAPR processing is reduced according to the PAPR control information. In the embodiment of the present application, the base station carries, by using the first message, the PAPR of the mobile terminal used to reduce the wireless signal transmitted by the mobile terminal. The parameter information, thereby allowing the wireless signal of the mobile terminal to have a higher EVM after the PAPR process is reduced, and since the base station knows the value of the PAPR parameter used by the mobile terminal, the base station can also demodulate the mobile terminal relatively easily. The transmitted wireless signal thereby increases the effect of reducing the PAPR of the wireless signal.

In conjunction with the second aspect, in a first implementation of the second aspect, the parameter information includes a clipping threshold.

With reference to the second aspect, in a second implementation manner of the second aspect, the parameter information includes a companding Companding function parameter; or the parameter information includes a companding parameter index CPI, wherein the CPI is used to determine a Companding Function parameters.

With reference to the second aspect, the first or second implementation manner of the second aspect, in a third implementation manner of the second aspect, the parameter information includes reserved subcarrier information, where the reservation The subcarrier is used by the mobile terminal to reduce the PAPR of the wireless signal.

In conjunction with the third implementation of the second aspect, in a fourth implementation of the second aspect, the parameter information includes a power constraint parameter of CFR noise.

With reference to the second aspect, the first, the second, the third, or the fourth implementation manner of the second aspect, in a fifth implementation manner of the second aspect, the first message is a radio resource control One or more of an RRC message, a medium access control MAC message, and physical layer signaling.

A third aspect of the present application provides an apparatus for reducing a peak-to-average power ratio PAPR of a wireless signal, including: a message sending unit, configured to send a first message, where the first message includes PAPR control information, and the PAPR control information a parameter information including a PAPR of a mobile terminal for reducing a radio signal transmitted by the mobile terminal; a signal receiving unit, configured to receive a wireless signal from the mobile terminal, where the wireless signal is reduced by the mobile terminal according to the PAPR control information Wireless signal after PAPR processing. The apparatus realizes the functions of the apparatus in the method of reducing the PAPR of the wireless signal in the first aspect described above, and thus can also realize the advantageous effects of the method of reducing the PAPR of the wireless signal in the first aspect.

In conjunction with the third aspect, in a first implementation manner of the third aspect, the PAPR control information includes a clipping threshold. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the first implementation manner of the first aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the first implementation manner of the first aspect. The benefits.

With reference to the third aspect, in a second implementation manner of the third aspect, the parameter information includes a companding Companding function parameter; or the parameter information includes a companding parameter index CPI, where the CPI is used to determine Companding function parameters. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the second implementation manner of the foregoing first aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the second implementation manner of the first aspect. The benefits.

In conjunction with the implementation of the first or second aspect of the third aspect, in a third implementation manner of the third aspect, the parameter information is determined according to any one of the following manners or a combination of multiple manners: One or more of a modulation and coding scheme MCS, a signal to interference and noise ratio SINR and a channel quality indicator CQI of the mobile terminal; according to the processing capability of the apparatus; according to the transmission power of the mobile terminal. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the third implementation manner of the first aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the third implementation manner of the first aspect. The benefits.

With reference to the third aspect, the first, the second, or the third implementation manner of the third aspect, in the fourth implementation manner of the third aspect, the parameter information includes reserved subcarrier information, reserved The subcarrier is used by the mobile terminal to reduce the PAPR of the wireless signal. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the fourth implementation manner of the foregoing first aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the fourth implementation manner of the first aspect. The benefits.

In conjunction with the fourth implementation of the third aspect, in a fifth implementation manner of the third aspect, the parameter information includes a power constraint parameter of CFR noise. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the fifth implementation manner of the first aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the fifth implementation manner of the first aspect. The benefits.

With reference to the third aspect, the first, the second, the third, the fourth, or the fifth implementation manner of the third aspect, in a sixth implementation manner of the third aspect, the first message is The radio resource controls one or more of an RRC message, a medium access control MAC message, and physical layer signaling. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the sixth implementation manner of the foregoing first aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the sixth implementation manner of the first aspect. The benefits.

A fourth aspect of the present application provides a base station, comprising the foregoing third aspect, the first, second, third, fourth, fifth or sixth aspect of the third aspect Implementations provide means for reducing the peak-to-average power ratio of the wireless signal to PAPR.

A fifth aspect of the present application provides a mobile terminal, comprising the foregoing third aspect, the first, second, third, fourth, fifth or sixth aspect of the third aspect The implementation provides a means for reducing the peak-to-average power ratio of the wireless signal to PAPR.

A sixth aspect of the present application provides a mobile terminal, including: a message receiving unit, configured to receive a first message, where the first message includes PAPR control information, where the PAPR control information includes the mobile terminal for reducing The parameter information of the PAPR of the transmitted wireless signal; the processing unit, configured to perform processing for reducing the PAPR of the wireless signal transmitted by the mobile terminal according to the parameter information of the PAPR of the PAPR control information used to reduce the wireless signal transmitted by the mobile terminal And a signal transmitting unit, configured to transmit a wireless signal after the PAPR processing is reduced according to the PAPR control information. The device realizes the function of the device in the method for reducing the PAPR of the wireless signal in the second aspect described above, and therefore the beneficial effects of the second method for reducing the PAPR of the wireless signal can also be realized.

In conjunction with the sixth aspect, in a first implementation manner of the sixth aspect, the parameter information includes a clipping threshold. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the first implementation manner of the second aspect, and thus can also implement the method for reducing the PAPR of the wireless signal in the first implementation manner of the second aspect. The benefits.

With reference to the sixth aspect, in a second implementation manner of the sixth aspect, the parameter information includes a companding Companding function parameter; or the parameter information includes a companding parameter index CPI, where the CPI is used to determine Companding function parameters. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the second implementation manner of the second aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the second implementation manner of the second aspect. The benefits.

With reference to the first or second implementation manner of the sixth aspect, in a third implementation manner of the sixth aspect, the parameter information includes reserved subcarrier information, where the reserved subcarrier is used for The mobile terminal reduces the PAPR of the wireless signal. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the third implementation manner of the second aspect, and therefore, the method for reducing the PAPR of the wireless signal in the third implementation manner of the second aspect is also The benefits.

In conjunction with the third implementation manner of the sixth aspect, in a fourth implementation manner of the sixth aspect, the parameter information includes a power constraint parameter of CFR noise. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the fourth implementation manner of the second aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the fourth implementation manner of the second aspect. The benefits.

With reference to the sixth aspect, the first, the second, the third, or the fourth implementation manner of the sixth aspect, in a fifth implementation manner of the sixth aspect, the first message is a radio resource control RRC One or more of a message, a medium access control MAC message, and physical layer signaling. The device implements the function of the device in the method for reducing the PAPR of the wireless signal in the fifth implementation manner of the second aspect, and therefore can also implement the method for reducing the PAPR of the wireless signal in the fifth implementation manner of the second aspect. The benefits.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the drawings without any creative work for those skilled in the art.

FIG. 1 is a flowchart of a method for reducing PAPR of a wireless signal according to an embodiment of the present disclosure;

FIG. 2 is a flowchart of another method for reducing PAPR of a wireless signal according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of still another method for reducing PAPR of a wireless signal according to an embodiment of the present disclosure;

FIG. 3a is a processing process of the Clipping & Filtering disclosed in the embodiment of the present application;

FIG. 3b is a working process of an iterative receiver disclosed in an embodiment of the present application;

FIG. 4 is a flowchart of still another method for reducing PAPR of a wireless signal according to an embodiment of the present disclosure;

4a is a processing procedure of a Companding process disclosed in an embodiment of the present application;

FIG. 4b is another working process of the iterative receiver disclosed in the embodiment of the present application;

FIG. 5 is a flowchart of still another method for reducing PAPR of a wireless signal according to an embodiment of the present disclosure. Figure

FIG. 5a is a schematic diagram of bandwidth allocation of a base station system according to an embodiment of the present application;

FIG. 6 is a flowchart of still another method for reducing PAPR of a wireless signal according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an apparatus for reducing PAPR of a wireless signal according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a communication apparatus according to an embodiment of the present disclosure;

FIG. 10 is another schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application.

The terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not intended to describe a particular order or order. It is to be understood that the terms so used are interchangeable under appropriate circumstances, and are merely illustrative of the manner in which the objects of the same attribute are used in the description of the embodiments of the present application.

The present application is applicable to wireless communication between a base station and a mobile terminal, or wireless communication between a mobile terminal and a mobile terminal. The present application may predefine various CFR methods that the mobile terminal may adopt in a communication protocol between each mobile terminal and a base station and a communication protocol between the mobile terminals, and the CFR method includes various methods for reducing PAPR. For example, Clipping & Filtering technology, Companding technology, TR technology, and the like. In the meantime, the present application can also define specific processing procedures of various CFR methods in the base station and in each mobile terminal in advance.

Specifically, the method for reducing the PAPR of the wireless signal provided by the present application is as shown in FIG. 1 , and includes:

Step 101: The communication device sends a first message, where the first message includes PAPR control information, and the PAPR control information includes parameter information of the PAPR used by the mobile terminal to reduce the wireless signal that it transmits.

The communication device in this embodiment of the present application may be a base station or a mobile terminal, and the communication device is configured to receive A wireless signal transmitted by a mobile terminal that is in communication with it. In the present application, when the communication device is specifically a mobile terminal, in order to distinguish it from the mobile terminal that is communicatively connected thereto, the communication device may be named as the first mobile terminal, and the mobile terminal communicatively connected thereto is named as the second mobile terminal. The terminal, that is, the first mobile terminal sends a first message to the second mobile terminal in the application. The first and second in the present application are for distinguishing different mobile terminals, and do not include a limitation on their order. When the first mobile terminal sends the first message to the second mobile terminal, the first message includes PAPR control information, and the PAPR control information includes parameter information of the PAPR used by the second mobile terminal to reduce the wireless signal transmitted by the second mobile terminal.

The mobile device (User Equipment, UE) in the embodiment of the present application may also be referred to as a terminal terminal, a mobile station (MS), a mobile terminal (MT), and the like. The UE may communicate with one or more core networks via a radio access network (RAN), or may access the distributed network in an ad hoc or unlicensed manner, and the UE may also access the wireless network through other means. To communicate, the UE can also directly communicate wirelessly with other UEs.

The first message in the embodiment of the present application may be one or more of a Radio Resource Control (RRC) message, a Media Access Control (MAC) message, and a physical layer signaling.

Step 102: The mobile terminal receives the first message.

Step 103: The mobile terminal performs a process of reducing a PAPR of the wireless signal transmitted by the mobile terminal according to the PAPR control information.

Step 104: The mobile terminal transmits a wireless signal, where the wireless signal is a wireless signal that is reduced by the mobile terminal according to the PAPR control information.

After receiving the first message, the mobile terminal performs PAPR reduction on the radio signal transmitted according to the PAPR control information in the first message, and sends out the radio signal after the PAPR reduction.

Step 105: The communication device receives a wireless signal from the mobile terminal.

Because the communication device in the present application carries the parameter information of the PAPR of the wireless signal transmitted by the mobile terminal by using the first message, thereby allowing the wireless signal of the mobile terminal to have a higher EVM after the PAPR process is reduced, and the communication device Knowing the value of the PAPR-reduced parameter used by the mobile terminal, the communication device can also relatively easily demodulate the wireless signal transmitted by the mobile terminal, thereby improving the effect of reducing the PAPR of the wireless signal.

In order to more clearly implement the description of the embodiments of the present application, the following applicants will separately describe a plurality of application scenarios involved in the present application.

Taking the wireless communication between the base station and the mobile terminal as an example, the base station is communicatively connected with the N mobile terminals, and N is a positive integer. The method for reducing the PAPR of a wireless signal provided by the embodiment of the present application is as shown in FIG. 2, and includes:

Step 201: The base station determines PAPR control information of the mobile terminal. The mobile terminal is any one of N mobile terminals communicatively connected to the base station.

In the embodiment of the present application, the communication protocol between the mobile terminal and the base station may predefine various CFR methods that the mobile terminal may adopt. For example, the terminal 1 may adopt the Clipping & Filtering technology, or the Companding technology, or the TR technology, and the terminal 2 may adopt Clipping & Filtering. The technology 3, the terminal 3 can adopt the Clipping & Filtering technology, or the TR technology, and the terminal 4 can adopt the TR technology or the like. Specifically, in the present application, the terminal 1 is taken as an example. When the communication protocol between the terminal 1 and the base station specifies that the terminal 1 can adopt the CPR method of the Clipping & Filtering technology, or the Companding technology, or the TR technology, the base station can The scheduling information of each mobile terminal within its current scheduling range determines the CFR method of the terminal 1 from among the three CFR methods that the terminal 1 can select. Of course, if the communication protocol between the mobile terminal and the base station specifies that the mobile terminal can only adopt a certain CFR method, for example, the terminal 2 can only adopt the Clipping & Filtering technology, the base station directly determines that the terminal 2 adopts the Clipping & Filtering technology.

After determining the CFR method adopted by the mobile terminal, the base station further determines PAPR control information corresponding to the CFR method. The CFR method includes the Clipping & Filtering technology, the Companding technology, the TR technology, etc., and the corresponding PAPR control information includes parameter information such as a Clipping threshold, a Companing function index, reserved subcarrier information, and a CFR noise power constraint parameter.

Step 202: The base station sends a first message to the mobile terminal, where the first message includes PAPR control information, and the PAPR control information includes parameter information of the PAPR used by the mobile terminal to reduce the wireless signal that it transmits.

Step 203: The mobile terminal receives the first message, and performs a process of reducing the PAPR of the wireless signal transmitted by the mobile terminal according to the parameter information in the PAPR control information in the first message.

Step 204: The mobile terminal sends a wireless signal to the base station, where the wireless signal is the mobile terminal. The wireless signal after the PAPR processing is reduced according to the PAPR control information.

In the embodiment of the present application, the base station sends a first message to the mobile terminal, and the mobile terminal performs CFR processing on the wireless signal transmitted by the parameter according to the parameter information in the PAPR control information in the first message by using the CFR method corresponding to the parameter information. And transmitting the wireless signal after the CFR processing to the base station. The wireless signal after the CFR processing is used to reduce the wireless signal after the PAPR processing.

Step 205: The base station receives the wireless signal from the mobile terminal to perform the PAPR reduction process.

In the embodiment of the present application, on the one hand, the base station determines the CFR method used by the mobile terminal and the corresponding PAPR control information, because the base station can obtain much more information than the mobile terminal can obtain, for example, the base station can acquire the communication with the base station. The scheduling information of all connected mobile terminals, the processing information of the base station itself, and the like, so the base station can comprehensively consider various information related to the mobile terminal, and then determine the CFR method adopted by the mobile terminal and corresponding corresponding based on the scheduling information of the mobile terminal. The PAPR control information is compared with the manner in which the mobile terminal selects the corresponding CFR technology according to the scheduling information of the mobile terminal. The embodiment of the present application improves the effect of the mobile terminal to reduce the PAPR of the wireless signal transmitted by the mobile terminal. On the other hand, because the base station notifies the mobile terminal to the CFR method and the corresponding PAPR control information adopted by the determined mobile terminal, so that the mobile terminal performs CFR processing by using the corresponding CFR method and parameter information in the corresponding PAPR control information. Therefore, the base station can perform corresponding processing on the received wireless signal by using the same parameter information as the mobile terminal, which is more advantageous for the base station to successfully demodulate the data sent by the mobile terminal, and further improve the effect of reducing the PAPR of the wireless signal.

The CFR method in the present application includes a Clipping technology, a Companding technology, a TR technology, etc., and the following applicants will separately elaborate on various implementations involved in the present application.

Solution 1: The mobile terminal adopts the Clipping & Filtering technology. As shown in Figure 3, it includes:

Step 301: The base station determines that the mobile terminal adopts a Clipping & Filtering technology.

In step 302, the base station determines a Clipping threshold corresponding to the Clipping & Filtering technology.

Specifically, step 302 of the present application can be implemented as follows:

(1) The base station determines a clipping threshold of the mobile terminal according to one or more of the MCS, the SINR, or the CQI of the mobile terminal.

In the embodiment of the present application, the lower the MCS, the SINR, and the CQI of the mobile terminal, the determined Clipping The smaller the threshold. The present application may pre-establish a first table for indicating a correspondence between the MCS, the SINR, the CQI, and the Clipping threshold. When the base station acquires one or more of the MCS, SINR, or CQI of the mobile terminal, the base station may pass The first table is queried to determine the corresponding Clipping threshold.

(2) The base station determines the clipping threshold of the mobile terminal according to the processing capability of the base station.

In the embodiment of the present application, the stronger the correction capability of the base station Clipping Noise, the smaller the determined Clipping threshold. In actual application, the more iterations of the iterative receiver in the base station, the stronger the ability of the base station to correct the Clipping Noise, and the lower the allowed clipping threshold. Therefore, the base station can adaptively adjust the number of iterations according to its processing capability and processing delay, and determine the corresponding Clipping threshold according to the number of iterations.

(3) The base station determines a clipping threshold of the mobile terminal according to the transmit power of the mobile terminal.

In the embodiment of the present application, the higher the transmit power of the mobile terminal, the smaller the power backoff of the corresponding PA (Power Amplifier), and the smaller the Clipping threshold is. The present application may pre-establish a second table for indicating the correspondence between the transmit power of the mobile terminal and the Clipping threshold. When the base station acquires the transmit power of the mobile terminal, the base station may determine the mobile terminal by querying the second table. Clipping threshold.

(4) The base station may further integrate the MCS, the SINR, the CQI of the mobile terminal, the transmit power of the mobile terminal, and the processing capability of the base station to determine the Clipping threshold of the mobile terminal.

Step 303: The base station sends a first message to the mobile terminal, where the first message includes a Clipping threshold.

Step 304: The mobile terminal receives the first message, performs CFR processing on the wireless signal by using the Clipping & Filtering technology according to the Clipping threshold value in the first message, and sends the CFR processed wireless signal to the base station.

In the present application, the processing procedure of the mobile terminal for the Clipping and Filtering by using the Clipping & Filtering technology according to the Clipping threshold value is shown in FIG. 3a. Among them, QAM: Quadrature Amplitude Modulation, Quadrature Amplitude Modulation; IFFT: Inverse Fast Fourier Transform, Fast Fourier Transform; FFT: Fast Fourier Transform, Fast Fourier Transform; D/A: Digital/Analog, Digital to Analog Conversion ;PA: Power Amplifier, power Amplifier.

Step 305: The base station receives the radio signal sent by the mobile terminal and performs CFR processing.

As preferred in the present application, after step 305 of the present application, the method may further include:

Step 306: The base station demodulates and decodes the received wireless signal from the mobile terminal to obtain an estimated signal.

Step 307: After encoding, mapping, and OFDM-modulating the estimated signal, generating two signals, which are a first path signal and a second path signal, respectively.

In the embodiment of the present application, after receiving the radio signal sent by the mobile terminal and performing the reduced PAPR process, the base station demodulates and decodes the radio signal, and re-demodulates and decodes the estimated signal obtained by decoding. Through the process of encoding, constellation mapping, OFDM modulation, etc., two signals are generated and output, which are the first signal and the second signal, respectively.

Step 308: According to the Clipping threshold, the first path signal is processed by using the same CFR method as the mobile terminal to obtain a first signal, and the second path signal is multiplied by an attenuation factor to obtain a first Two signals.

The first signal is processed by using the same Clipping & Filtering technology as the mobile terminal to obtain the first signal.

Step 309, subtracting the first signal from the second signal to obtain an estimated clipping noise.

Step 310: Adjust the estimated signal according to the Clipping noise.

In the embodiment of the present application, the estimated Clipping noise is subtracted from the estimated signal to eliminate the influence of Cliping Noise. After completing the adjustment of the estimated signal, returning to step 306 to continue performing steps 306 to 310 to start the next processing. Therefore, the demodulation performance can be improved by dividing the influence of Cliping Noise by multiple iterations. This specific process is shown in Figure 3b. In Figure 3b, the base station uses an iterative receiver to eliminate the effects of Clipping Noise. It should be noted that, in the present application, the process of the cleaning and filtering of the mobile terminal and the process of eliminating the Clipping Noise by the iterative receiver are respectively referred to in the document “H. Chen, AMHaimovich, “Iterative Estimation and Cancellation”. Of Clipping Noise for OFDM Signals "IEEE Commun. Letter, vol. 7, no. 7, pp. 305-307, Jul. 2003", which is not described herein.

In the present application, since the lifting threshold used by the mobile terminal is sent by the base station, the limitation of the EVM by the mobile terminal can be relaxed, and the threshold of the EVM can be increased. Moreover, the base station knows that the mobile terminal uses the Clipping technology to implement the CFR processing, so the base station can reproduce the processing of the mobile terminal Clipping and Filtering, thereby offsetting the impact of the Clipping Noise. Therefore, in the case of increasing the threshold of the EVM, the base station further eliminates the signal distortion introduced by the mobile terminal during the CFR processing, that is, the influence of clipping noise, improves the signal quality of the transmitted signal, and ensures that the base station effectively transmits to the mobile terminal. The wireless signal is demodulated and decoded.

In addition, in order to reduce the downlink transmission overhead of the Clipping threshold, the Clipping threshold in this application can be quantized, such as 0 dB, 1 dB, 3 dB, ..., 15 dB, a total of 16 possible Clipping thresholds, and the transmission overhead is 4bit, thus saving transmission bits.

In the traditional mobile communication system, the mobile terminal's Clipping threshold is determined by the mobile terminal itself. If the base station wants to correct or compensate the EVM introduced by Clipping Noise by using the iterative receiver shown in FIG. 3b, the mobile terminal needs to be Clipped. Threshold values are estimated. However, estimating the Clipping threshold usually requires additional pilot overhead and the corresponding processing complexity is also high. In the embodiment of the present application, the Capping threshold of the mobile terminal is determined by the base station, so the base station does not need to estimate the Clipping threshold, which reduces the pilot overhead and processing complexity. In this application, the Clipping Noise is compensated by the base station, and the base station can comprehensively consider various factors, such as the MCS, the SINR, the CQI, the processing capability of the base station itself, and the transmit power of the mobile terminal, so as to reduce the Clipping threshold of the mobile terminal as much as possible. And PAPR, while ensuring that uplink receiving performance is not affected.

Solution 2: The mobile terminal adopts Companding technology. As shown in Figure 4, it includes:

Step 401: The base station determines that the mobile terminal adopts a Companding technology.

Step 402: The base station determines a Companding function parameter corresponding to the Companding technology.

Specifically, in the embodiment of the present application, the method for determining the parameters of the Computing function by the base station may be used in the prior art, and details are not described herein.

Step 403: The base station sends a first message to the mobile terminal, where the first message includes a Companding function parameter.

Step 404: The mobile terminal receives the first message, performs CFR processing on the wireless signal by using the Companding technology according to the Companding function parameter in the first message, and performs CFR processing. The subsequent wireless signal is sent to the base station.

In the present application, the processing procedure in which the mobile terminal performs a Companding process on the wireless signal according to the Companding function parameter can be referred to FIG. 4a.

Step 405: The base station receives the radio signal sent by the mobile terminal and performs CFR processing.

As preferred in the present application, after step 405 of the present application, the method may further include:

Step 406: The base station demodulates and decodes the received wireless signal from the mobile terminal to obtain an estimated signal.

Step 407: After encoding, mapping, and OFDM modulating the estimated signal, generating two signals, which are a first path signal and a second path signal, respectively.

Step 408: According to the calculation function parameter, the first path signal is processed by using the same CFR method as the mobile terminal to obtain a first signal, and the second path signal is multiplied by an attenuation factor to obtain a second signal. signal.

According to the Companding function parameter, the first signal is processed by the same CFR method as the mobile terminal, that is, the Companding technology, to obtain the first signal.

Step 409, subtracting the first signal from the second signal to obtain an estimated combining noise.

Step 410: Adjust the estimated signal according to the Companding noise.

In the embodiment of the present application, the estimated Companding noise is subtracted from the estimated signal to eliminate the influence of the Companding Noise. After completing the adjustment of the estimated signal, returning to step 406 to continue performing steps 406 to 410 to start the next processing. Therefore, demodulation performance can be improved by multiple iterations in addition to the influence of Companding Noise. This specific process is shown in Figure 4b. In Figure 4b, the base station uses an iterative receiver to eliminate the effects of Companding Noise. It should be noted that the processing procedure of the mobile terminal performing the combining processing and the process of the iterative receiver eliminating the Companding Noise in FIG. 4a and FIG. 4b respectively in the present application can be referred to the document “T. Jiang, W. Yao, P. Guo, Y. Song, and D. Qu, "Two novel nonlinear companding schemes with iterative receiver to reduce PAPR in multicarrier modulation systems," IEEE Trans. Broadcasting, vol. 52, no. Pp. 268-273, Mar. 2006.", the applicant will not repeat them here.

In the embodiment of the present application, when the base station sends the calculation function parameter to the mobile terminal, the calculation function parameter occupies the transmission resource of the base station, and increases the transmission overhead of the control signaling. In order to reduce the transmission overhead of the control signaling, the correspondence between the CPI and the Companding function parameters may be separately defined in the base station and the mobile terminal, for example, a Companding Parameter Index (CPI) index table is pre-established and stored. The CPI index table records the correspondence between the CPI and the Companding function parameters, wherein the CPI and the Companding function parameters are in one-to-one correspondence, and the CPI is used to determine the Companding function parameters.

Then, the step 402 may be: the base station only determines the CPI; in step 403, the base station sends the determined CPI to the mobile terminal, and does not send the combining function parameter to the mobile terminal, that is, in the embodiment of the present application, the base station determines each After the CPI of the mobile terminal, the determined CPI is sent to each mobile terminal by using a downlink control command, and each mobile terminal searches for a Companding function parameter corresponding to the received CPI according to the predefined CPI index table, and further transmits the uplink transmit signal. Performing processing. Finally, the base station uses the same Computing function parameters to reproduce the Companding process of the mobile terminal, thereby eliminating the influence of the Companding Noise.

In the actual application process of the present application, the binding nonlinear function involved in the Companding technology and the Companding function parameter of the K group with different compression ratios have been specified in the protocol between the mobile terminal and the base station. Where K is a positive integer. In the present application, the Companing nonlinear function includes a u-law Companding function, an A-law Companding function, an exponential Sharing function, and the like.

Assume that the Companding nonlinear function y=f(x,α,β,γ) contains three parameters α,β,γ, x is the input time domain signal of Companding, and y is the output signal of Companding. In the K-group Companding function parameters specified in the protocol, the values of the three parameters α, β, γ are uniquely determined by the CPI, and different CPIs correspond to different Companding compression ratios. Without loss of generality, the smaller the CPI is, the larger the compression ratio of the dynamic range of the signal is, as shown in Table 1 below.

Table 1

The method for determining the CPI involved in the embodiment of the present application may be implemented as follows:

(1) The base station determines the CPI of the mobile terminal according to one or more of the MCS, the SINR, or the CQI of the mobile terminal.

In the embodiment of the present application, the smaller the MCS, the SINR, and the CQI of the mobile terminal are, the smaller the CPI is, that is, the effect of reducing the PAPR of the transmission signal is more obvious. The present application may pre-establish a third table for indicating the correspondence between the MCS, SINR, CQI and CPI of the mobile terminal, as shown in Table 2 below, where 0≤I ₀ ≤I ₁ ≤...≤I _L ≤K. When the base station acquires one or more of the MCS, the SINR, or the CQI of the mobile terminal, the CPI corresponding thereto may be determined by querying the third table.

MCS/CQI IndexMCS/CQI Index	CPICPI
00	I₀ I ₀
11	I₁ I ₁
22	I₂ I ₂
……......	……......
LL	I_L I _L

Table 2

(2) The base station determines the CPI of the mobile terminal according to the processing capability of the base station.

In the embodiment of the present application, the stronger the correction capability of the base station Companding Noise, the smaller the determined CPI. In the actual application process, the more iterations of the iterative receiver in the base station, the stronger the ability of the base station to correct the Companding Noise, and the lower the allowed CPI. Therefore, the base station can adaptively adjust the number of iterations according to its processing capability and processing delay, and determine the corresponding CPI according to the number of iterations.

(3) The base station determines the CPI of the terminal according to the transmission power of the mobile terminal.

In the embodiment of the present application, the higher the transmission power of the mobile terminal, the smaller the corresponding PA power backoff, and the smaller the determined CPI. The present application may pre-establish a fourth table for indicating the correspondence between the transmit power of the mobile terminal and the CPI. When the base station acquires the transmit power of the mobile terminal, the CPI of the mobile terminal may be determined by querying the fourth table.

(4) The base station may further integrate the MCS, SINR, CQI of the terminal, the transmission power of the mobile terminal, and the processing capability of the base station to determine the CPI of the mobile terminal.

In the embodiment of the present application, the base station may comprehensively consider various factors, such as MCS, SINR, CQI, the processing capability of the base station itself, and the transmit power of the mobile terminal, to select the CPI, and then determine the Companding function parameter corresponding to the CPI, and optimize. System performance.

Solution 3: The mobile terminal adopts TR technology. As shown in Figure 5, it includes:

In step 501, the base station determines that the mobile terminal adopts the TR technology.

Step 502: The base station determines reserved subcarrier information corresponding to the TR technology, where the reserved subcarrier is used by the mobile terminal to reduce the PAPR of the wireless signal.

As shown in FIG. 5a, the base station allocates system bandwidth to a plurality of mobile terminals, such as UE0, UE1, and UE2. In addition to the bandwidth allocated to the UE0, the UE1, and the UE2, the system bandwidth of the base station still has the protection bandwidth and the idle bandwidth. The subcarrier resources corresponding to the protection bandwidth and the idle bandwidth do not occupy N mobiles within the current scheduling range of the base station. The frequency resource of the terminal, and therefore does not introduce interference to the frequency band occupied by the mobile terminal. Based on this, the present application selects part of the subcarrier resources from the idle bandwidth and/or the protection bandwidth that are not allocated in the system bandwidth as the reserved subcarrier resources corresponding to the TR technology. In the actual application process of the present application, multiple mobile terminals may be allocated the same reserved subcarrier resource, or may be allocated different reserved subcarrier resources. The allocation mode of the reserved subcarrier resources may be a continuous allocation method or a non-continuous allocation method.

In the embodiment of the present application, in order to ensure that when the system load is high, for example, when the number of accessing mobile terminals is large, the system has sufficient reserved subcarrier resources, and the base station may pre-fix a certain specific frequency resource as a reserved sub-resource. Carrier resources. In order to reduce the transmission overhead of the control signaling, the embodiment of the present application may use the RB resource block index to transmit, that is, the base station transmits only the initial RB index corresponding to the reserved subcarrier resource and the reserved subcarrier resource to the mobile terminal. RB length, the mobile terminal determines the reserved subcarrier resource according to the starting RB index and the RB length occupied by the reserved subcarrier resource.

Step 503: The base station sends a first message to the mobile terminal, where the first message includes reserved subcarrier information, where the reserved subcarrier is used by the mobile terminal to reduce a PAPR of the wireless signal.

Step 504: The mobile terminal receives the first message, performs CFR processing on the radio signal transmitted according to the reserved subcarrier information in the first message, and sends the CFR processed wireless signal to the base station.

Step 505: The base station receives the radio signal sent by the mobile terminal and performs CFR processing.

In the embodiment of the present application, the mobile terminal uses the TR technology to reduce the PAPR processing on the uplink radio signal, and the reserved subcarrier resource does not overlap with the subcarrier resources allocated by the N mobile terminals, and therefore does not occupy the mobile terminal. The frequency band introduces interference. After receiving the transmit signal sent by the mobile terminal and performing the reduced PAPR process, the base station can directly implement the demodulation process of the uplink transmit signal of each mobile terminal by using a conventional OFDM receiver without adding additional processing resources.

In the prior art, in addition to knowing the bandwidth allocated by the mobile terminal, the mobile terminal does not know which subcarrier resources in the system bandwidth are idle or unallocated, and therefore cannot use the TR technology to reduce the wireless signal transmitted by the mobile terminal. PAPR. By introducing the assistance of the base station, the embodiment of the present application informs the mobile terminal that the mobile terminal can reduce the reserved subcarrier resources of the PAPR, so that the mobile terminal uses the TR technology to reduce the PAPR of the transmitted signal.

Solution 4: When the mobile terminal adopts any one of the foregoing schemes 1 to 3, as shown in FIG. 6, the method includes:

Step 601: The base station determines a CFR method used by the mobile terminal, where the CFR method includes a Clipping & Filtering technology, a Companding technology, or a TR technology.

Step 602: The base station determines a power constraint parameter of the CFR noise.

In the embodiment of the present application, the base station may determine, according to the RSRP, the MCS, and the EVM indicator corresponding to the MCS of the mobile terminal, a power constraint parameter of the CFR noise that is allowed to be superimposed on the allocated subcarrier resource.

It should be noted that the fourth solution in the embodiment of the present application may be combined with any one of the foregoing first to third embodiments. When the TR technology is adopted in the fourth and third embodiments of the present application, the TR technology used in the fourth solution of the present application and the TR technology used in the third embodiment may be different, because the fourth embodiment of the present application relates to the control of the interference noise power, The present application may use an out-of-band frequency resource to perform PAPR reduction processing, where the out-of-band frequency resource refers to a sub-carrier resource allocated to other mobile terminals or other devices.

Step 603: The base station sends a first message to the mobile terminal, where the first message includes a power constraint parameter of CFR noise.

Step 604: The mobile terminal receives the first message, performs CFR processing on the wireless signal of the mobile terminal according to the power constraint parameter of the CFR noise in the first message, and sends the CFR processed wireless signal to the wireless signal. Base station.

Step 605: The base station receives the radio signal sent by the mobile terminal and performs CFR processing.

In the prior art, the mobile terminal does not know which subcarrier resources in the system bandwidth are idle or unallocated, and does not know the superimposed superimposed on other allocated subcarrier resources. CFR noise threshold, so the mobile terminal in the prior art uses CFR processing by using its own allocated frequency resources (such as first performing Clipping, then filtering out the out-of-band Clipping noise, and retaining the in-band Clipping noise). External frequency resources to further reduce PAPR. By introducing the assistance of the base station, the embodiment of the present application informs the mobile terminal of the power constraint parameters of the outband frequency resource that can be used to reduce the PAPR subcarrier resource and the CFR noise, so that the mobile terminal further reduces the frequency resource by using the outband. PAPR enables mobile terminals to have more degrees of freedom for CFR processing, which improves the effect of reducing PAPR.

In the first application to the fourth embodiment of the present application, in the actual application process of the present application, each solution can be flexibly combined to improve the effect of reducing the PAPR of the mobile terminal.

As shown in FIG. 7, the present application further provides a communication apparatus for reducing PAPR of a wireless signal, and the device The function of the communication device in the method embodiment for implementing the above-described PAPR for reducing the wireless signal, the communication device comprising: a message transmitting unit 10 and a signal receiving unit 20. among them,

The message sending unit 10 is configured to send a first message, where the first message includes PAPR control information, where the PAPR control information includes parameter information of a PAPR used by the mobile terminal to reduce a wireless signal that is transmitted by the mobile terminal;

The signal receiving unit 20 is configured to receive a wireless signal from the mobile terminal, where the wireless signal is a wireless signal that is reduced by the mobile terminal according to the PAPR control information.

The first message is one or more of an RRC message, a MAC message, and physical layer signaling. The PAPR control information includes a Clipping threshold, a Companding function parameter, a CPI for determining a Companding function parameter, reserved subcarrier information, or a power constraint parameter of CFR noise.

When the parameter information is the clipping threshold or the CPI, the embodiment of the present application may also determine the PAPR control information according to any one of the following manners or a combination of multiple manners:

One or more of a modulation and coding scheme MCS, a signal to interference and noise ratio SINR, and a channel quality indicator CQI of the mobile terminal;

According to the processing capability of the communication device;

According to the transmission power of the mobile terminal.

The apparatus for reducing the PAPR of the wireless signal provided by the present application may be specifically a base station or a mobile terminal, or may be integrated in a base station or a mobile terminal.

A more detailed description of the functions of the above-mentioned message transmitting unit 10 and the signal receiving unit 20 can be directly obtained by referring to the above method embodiment, and details are not described herein.

In addition, the present application further provides a mobile terminal, as shown in FIG. 8, the mobile terminal implements the foregoing functions of the mobile terminal in the method for reducing the PAPR of the wireless signal, and the mobile terminal includes:

The message receiving unit 100 is configured to receive a first message, where the first message includes PAPR control information, where the PAPR control information includes parameter information of a PAPR used by the mobile terminal to reduce a wireless signal that is transmitted by the mobile terminal;

The processing unit 200 is configured to use, according to the PAPR control information, a wireless signal for reducing its transmission. The parameter information of the PAPR of the number, performing a process of reducing the PAPR of the wireless signal transmitted by the mobile terminal;

The signal transmitting unit 300 is configured to transmit a radio signal after the PAPR processing is reduced according to the PAPR control information.

A more detailed description of the functions of the above-mentioned method receiving unit 100, the processing unit 200, and the signal transmitting unit 300 can be directly obtained by referring to the foregoing method embodiments, and details are not described herein.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In addition, as shown in FIG. 9, the embodiment of the present application further provides a communication device, which can implement the function of the communication device in the method for reducing the PAPR of the wireless signal, and thus can also implement the PAPR for reducing the wireless signal. The beneficial effects of the method. In the embodiment of the present application, the communication device may be a UE, a base station, or another transmitting side device that uses data communication of the HARQ technology. The communication device 1000 includes a transmitter 1001 and a receiver 1002. The transmitter 1001 implements the related functions of the message transmitting unit 10, and the receiver 1002 implements the related functions in the signal receiving unit 20.

It will be understood that Figure 9 only shows one design of the communication device. In practical applications, the communication device can include any number of receivers 1010 and transmitters 1030, and all communication devices that can implement the embodiments of the present application are within the scope of the present application.

As shown in FIG. 10, the embodiment of the present application further provides a mobile device, which can implement the foregoing functions of the mobile terminal in the method for reducing the PAPR of the wireless signal, and thus can also implement the foregoing method for reducing the PAPR of the wireless signal. Have the beneficial effects. In the embodiment of the present application, the mobile device 2000 includes a receiver 2001, a processor 2002, and a transmitter 2003. The receiver 2001 implements the related functions of the message receiving unit 100, and the processor 2002 implements the foregoing processing unit 200. In the related function, the transmitter 2003 implements the related functions in the above-described signal transmitting unit 300.

It will be appreciated that Figure 10 only shows one design of the mobile device. In a practical application, the mobile device may include any number of receivers 2001, processors 2002, and transmitters 2003, and all mobile devices that can implement the embodiments of the present application are within the scope of the present application.

It can be understood that the processor, the receiver, and the transmitter in the embodiment of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSPs). ), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. A general purpose processor can be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by a processor executing software instructions. The software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (Programmable ROM). , PROM), Erasable PROM (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Register, Hard Disk, Mobile Hard Disk, CD-ROM, or well known in the art Any other form of storage medium. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a transmitting device or a receiving device. Of course, the processor and the storage medium can also exist as discrete components in the transmitting device or the receiving device.

Those skilled in the art will appreciate that in one or more examples described above, the functions described herein can be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored in a computer readable medium or transmitted 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 or related information from one location to another. A storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only convenient for description. The distinction is not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken by the embodiment of the present application. The implementation process constitutes any qualification.

The foregoing is only a specific embodiment of the embodiments of the present application, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered by the protection of the embodiments of the present application. Within the scope.

Claims

A method for reducing a peak-to-average power ratio PAPR of a wireless signal, comprising:

Transmitting a first message, where the first message includes PAPR control information, where the PAPR control information includes parameter information of a PAPR used by the mobile terminal to reduce a wireless signal that is transmitted by the mobile terminal;

Receiving a wireless signal from the mobile terminal, where the wireless signal is a wireless signal that is reduced by the mobile terminal according to the PAPR control information.
The method of claim 1 wherein said parameter information comprises a clipping threshold.
The method according to claim 1, wherein the parameter information comprises a companding Companding function parameter;

Or, the parameter information includes a companding parameter index CPI, wherein the CPI is used to determine a Companding function parameter.
The method according to claim 2 or 3, wherein the parameter information is determined according to any one or a combination of the following:

One or more of a modulation and coding scheme MCS, a signal to interference and noise ratio SINR, and a channel quality indicator CQI of the mobile terminal;

According to the processing capacity of the base station;

According to the transmission power of the mobile terminal.
The method according to any one of claims 1 to 4, wherein the parameter information comprises reserved subcarrier information, and the reserved subcarrier is used by the mobile terminal to reduce the PAPR of the wireless signal.
The method of claim 5 wherein said parameter information comprises power constraint parameters of CFR noise.
The method according to any one of claims 1 to 6, wherein the first message is one or more of a radio resource control RRC message, a medium access control MAC message, and physical layer signaling.
A method for reducing a peak-to-average power ratio (PAPR) of a wireless signal is applied to a mobile terminal, and the method includes:

Receiving a first message, where the first message includes PAPR control information, where the PAPR control information includes parameter information of a PAPR used by the mobile terminal to reduce a wireless signal that it transmits;

Performing a process of reducing a PAPR of a wireless signal transmitted by the mobile terminal according to parameter information of a PAPR of the PAPR control information used to reduce a wireless signal transmitted by the mobile terminal;

Transmitting a radio signal after the PAPR process is reduced according to the PAPR control information.
The method of claim 8 wherein said parameter information comprises a clipping threshold.
The method according to claim 8, wherein the parameter information comprises a companding Companding function parameter;

Or, the parameter information includes a companding parameter index CPI, wherein the CPI is used to determine a Companding function parameter.
The method according to any one of claims 8 to 10, wherein the parameter information comprises reserved subcarrier information, wherein the reserved subcarrier is used by the mobile terminal to reduce a PAPR of the wireless signal .
The method of claim 11 wherein said parameter information comprises power constraint parameters of CFR noise.
The method according to any one of claims 8 to 12, wherein the first message is one or more of a radio resource control RRC message, a medium access control MAC message, and physical layer signaling.
A device for reducing a peak-to-average power ratio PAPR of a wireless signal, comprising:

a message sending unit, configured to send a first message, where the first message includes PAPR control information, where the PAPR control information includes parameter information of a PAPR used by the mobile terminal to reduce a wireless signal that is transmitted by the mobile terminal;

And a signal receiving unit, configured to receive a wireless signal from the mobile terminal, where the wireless signal is a wireless signal that is reduced by the mobile terminal according to the PAPR control information.
The apparatus of claim 14 wherein said parameter information comprises a clipping threshold.
The apparatus according to claim 14, wherein said parameter information comprises companding Companding function parameters;

Or, the parameter information includes a companding parameter index CPI, wherein the CPI is used to determine a Companding function parameter.
The apparatus according to claim 15 or 16, wherein the parameter information is determined according to any one or a combination of the following:

One or more of a modulation and coding scheme MCS, a signal to interference and noise ratio SINR, and a channel quality indicator CQI of the mobile terminal;

According to the processing capability of the device;

According to the transmission power of the mobile terminal.
The apparatus according to any one of claims 14-17, wherein the parameter information comprises reserved subcarrier information, and the reserved subcarrier is used by the mobile terminal to reduce a PAPR of the wireless signal.
The apparatus of claim 18 wherein said parameter information comprises power constraint parameters of CFR noise.
The apparatus according to any one of claims 14 to 19, wherein the first message is one or more of a radio resource control RRC message, a medium access control MAC message, and physical layer signaling.
A base station, comprising the apparatus for reducing a peak-to-average power ratio PAPR of a wireless signal according to any one of claims 14 to 20.
A mobile terminal, comprising the apparatus for reducing a peak-to-average power ratio PAPR of a wireless signal according to any one of claims 14 to 20.
A mobile terminal, comprising:

a message receiving unit, configured to receive a first message, where the first message includes PAPR control information, where the PAPR control information includes parameter information of a PAPR used by the mobile terminal to reduce a wireless signal that is transmitted by the mobile terminal;

a processing unit, configured to perform a process of reducing a PAPR of a wireless signal transmitted by the mobile terminal according to parameter information of a PAPR of the PAPR control information used to reduce a wireless signal that is transmitted by the mobile terminal;

a signal transmitting unit, configured to transmit, after the PAPR processing is performed according to the PAPR control information Wireless signal.
The mobile terminal according to claim 23, wherein the parameter information comprises a clipping threshold.
The mobile terminal according to claim 23, wherein the parameter information comprises a companding Companding function parameter;

Or, the parameter information includes a companding parameter index CPI, wherein the CPI is used to determine a Companding function parameter.
The mobile terminal according to any one of claims 23-25, wherein the parameter information comprises reserved subcarrier information, wherein the reserved subcarrier is used by the mobile terminal to reduce the wireless signal. PAPR.
The mobile terminal of claim 26, wherein the parameter information comprises a power constraint parameter of CFR noise.
The mobile terminal according to any one of claims 23 to 27, wherein the first message is one or more of a radio resource control RRC message, a medium access control MAC message, and physical layer signaling.