CN120528443A - Radio frequency system, terminal, and radio frequency signal control method - Google Patents
Radio frequency system, terminal, and radio frequency signal control methodInfo
- Publication number
- CN120528443A CN120528443A CN202510652847.6A CN202510652847A CN120528443A CN 120528443 A CN120528443 A CN 120528443A CN 202510652847 A CN202510652847 A CN 202510652847A CN 120528443 A CN120528443 A CN 120528443A
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- Prior art keywords
- radio frequency
- power amplifier
- electrically connected
- feedback
- feedback receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
本申请提供一种射频系统、终端及射频信号的调控方法。射频系统包括天线辐射体、收发器、发射电路、预失真器、第一反馈接收线路及第二反馈接收线路。发射电路包括功率放大器、第一传输线路、滤波器和第二传输线路，第一传输线路电连接于功率放大器与滤波器之间，第二传输线路电连接于滤波器与天线辐射体之间。预失真器电连接于功率放大器的输入端之前，用于对功率放大器的非线性特性进行补偿。第一反馈接收线路的一端与第一传输线路耦合，另一端电连接预失真器。第二反馈接收线路的一端与第二传输线路耦合，另一端电连接收发器。本申请提供的射频系统、终端及射频信号的调控方法能够更精准的平衡功率放大器的效率和线性度。
The present application provides a radio frequency system, a terminal, and a method for controlling radio frequency signals. The radio frequency system includes an antenna radiator, a transceiver, a transmitting circuit, a predistorter, a first feedback receiving line, and a second feedback receiving line. The transmitting circuit includes a power amplifier, a first transmission line, a filter, and a second transmission line. The first transmission line is electrically connected between the power amplifier and the filter, and the second transmission line is electrically connected between the filter and the antenna radiator. The predistorter is electrically connected before the input end of the power amplifier and is used to compensate for the nonlinear characteristics of the power amplifier. One end of the first feedback receiving line is coupled to the first transmission line, and the other end is electrically connected to the predistorter. One end of the second feedback receiving line is coupled to the second transmission line, and the other end is electrically connected to the transceiver. The radio frequency system, terminal, and method for controlling radio frequency signals provided in the present application can more accurately balance the efficiency and linearity of the power amplifier.
Description
Technical Field
The application relates to the technical field of communication, in particular to a radio frequency system, a terminal and a method for regulating and controlling radio frequency signals.
Background
In a radio frequency system, a Power Amplifier (PA) is a nonlinear device, and has the problems of contradiction between efficiency and linearity, the filter easily causes amplitude distortion of a feedback signal due to unevenness of a passband of the filter, and the filter filters out-of-band distortion components output by the PA, so that partial nonlinear information is lost in the feedback signal, and therefore, how to more accurately balance the efficiency and the linearity of the PA in the radio frequency system becomes a technical problem to be solved.
Disclosure of Invention
The application provides a radio frequency system, a terminal and a radio frequency signal regulation and control method capable of balancing the efficiency and linearity of a PA more accurately.
In one aspect, the application provides a radio frequency system comprising:
An antenna radiator;
A transceiver;
The transmitting circuit comprises a power amplifier, a first transmission line, a filter and a second transmission line, wherein the input end of the power amplifier is electrically connected with the transceiver, the first transmission line is electrically connected between the output end of the power amplifier and the input end of the filter, and the second transmission line is electrically connected between the output end of the filter and the input end of the antenna radiator;
a predistorter, which is electrically connected to the input end of the power amplifier, and is used for compensating the nonlinear characteristic of the power amplifier;
A first feedback receiving line having one end coupled to the first transmission line and the other end electrically connected to the predistorter, and
And one end of the second feedback receiving line is coupled with the second transmission line, and the other end of the second feedback receiving line is electrically connected with the transceiver.
On the other hand, the application also provides a terminal which comprises an equipment main body and the radio frequency system, wherein the radio frequency system is arranged on the equipment main body.
In still another aspect, the present application further provides a method for adjusting and controlling a radio frequency signal, which is performed in the radio frequency system, including:
acquiring a first signal fed back by the first feedback receiving circuit;
pre-distortion processing is carried out on the transmitted radio frequency signals according to the first signals;
acquiring a second signal fed back by the second feedback receiving circuit;
and carrying out power adjustment on the transmitted radio frequency signals according to the second signals.
The radio frequency system comprises an antenna radiator, a transceiver, a transmitting circuit, a predistorter, a first feedback receiving circuit and a second feedback receiving circuit, wherein the transmitting circuit comprises the transceiver, a power amplifier, a first transmission circuit, a filter and a second transmission circuit, the transceiver is electrically connected with the input end of the power amplifier, the first transmission circuit is electrically connected between the output end of the power amplifier and the input end of the filter, the second transmission circuit is electrically connected between the output end of the filter and the input end of the antenna radiator, the predistorter is electrically connected in front of the input end of the power amplifier and is used for compensating the nonlinear characteristics of the power amplifier, one end of the first feedback receiving circuit is coupled with the first transmission circuit, the other end of the first feedback receiving circuit is electrically connected with the predistorter, one end of the second feedback receiving circuit is coupled with the second transmission circuit, and the other end of the second feedback receiving circuit is electrically connected with the transceiver, so that the first feedback receiving circuit is coupled with the rear end of the power amplifier, the front end of the filter enables the first feedback receiving circuit to be in front of the filter, the signal fed back by the first feedback receiving circuit is not participated in the filter, the predistortion circuit can compensate the nonlinear characteristics of the power amplifier, the nonlinear characteristics of the power amplifier can be more accurate and the nonlinear characteristics of the power amplifier can be prevented from being more accurate to be better than the linear or the nonlinear characteristics of the antenna, and the nonlinear characteristics can be better amplified by the nonlinear and the nonlinear amplifier.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described.
Fig. 1 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a radio frequency system according to an embodiment of the present application;
FIG. 3 is a graph of linearity curves of a predistorter and a power amplifier in a radio frequency system according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a configuration of the RF system shown in FIG. 1 including a first coupler and a second coupler;
FIG. 5 is a schematic diagram of a configuration of the RF system shown in FIG. 2 including a first coupler and a second coupler;
FIG. 6 is a schematic diagram of another configuration of the RF system shown in FIG. 1 including a first coupler and a second coupler;
FIG. 7 is a schematic diagram of another configuration of the RF system shown in FIG. 2 including a first coupler and a second coupler;
FIG. 8 is a schematic diagram of the RF system of FIG. 5 further including a controller;
Fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present application;
Fig. 10 is a schematic flow chart of a method for regulating and controlling a radio frequency signal according to an embodiment of the present application;
fig. 11 is a schematic flow chart of the method for regulating and controlling the radio frequency signal shown in fig. 10, including step S101 and step S301.
Reference numerals illustrate:
The radio frequency system 100, the antenna radiator 10, the transceiver 20, the predistorter 30, the first feedback receiving line 401, the second feedback receiving line 501, the power amplifier 202, the first transmission line 203, the filter 204, the second transmission line 205, the first coupler 402, the second coupler 502, the first electrical connection port a, the second electrical connection port B, the third electrical connection port C, the fourth electrical connection port D, the fifth electrical connection port E, the sixth electrical connection port F, the seventh electrical connection port G, the eighth electrical connection port H, the feedback port M, the switch 60, the controller 70, the transmitting port N, the terminal 1000, and the device body 11.
Detailed Description
The technical scheme provided by the application is clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments of the application are only some embodiments, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the embodiments described herein, fall within the scope of the application.
Reference in the specification to "an embodiment," "an example" means that a particular feature, structure, or characteristic described may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The terms first, second and the like in the description and in the claims, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, an assembly or device incorporating one or more components is not limited to the listed one or more components, but may alternatively include one or more components not listed but inherent to the illustrated product, or one or more components that may be present based on the illustrated functionality.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a radio frequency system 100 according to an embodiment of the present application, and fig. 2 is another schematic structural diagram of the radio frequency system 100 according to an embodiment of the present application. The radio frequency system 100 comprises an antenna radiator 10, a transceiver 20, a transmitting circuit, a predistorter 30, a first feedback receive line 401 and a second feedback receive line 501. The transmit circuit includes a power amplifier 202, a first transmission line 203, a filter 204, and a second transmission line 205.
Wherein the antenna radiator 10 is a conductor having a specific size. When divided in the structure of the antenna radiator 10, the antenna radiator 10 includes, but is not limited to, a monopole antenna radiator, or a dipole antenna radiator, or a patch antenna radiator, or an array antenna radiator, or a spiral antenna radiator, or the like. When the application scenario of the antenna radiator 10 is divided, the antenna radiator 10 includes, but is not limited to, a cellular antenna radiator, or a WIFI antenna radiator, or a satellite antenna radiator. The antenna comprises a cellular antenna radiator, a WIFI antenna radiator and a satellite antenna radiator, wherein the cellular antenna radiator is used for supporting cellular communication, the cellular communication comprises but is not limited to 4G mobile communication, 5G mobile communication and the like, the WIFI antenna radiator is used for supporting WIFI communication, the satellite antenna radiator is used for supporting satellite communication, and the satellite communication comprises but is not limited to global positioning system (Global Positioning System, GPS) communication. The antenna radiator 10 includes, but is not limited to, a low frequency antenna radiator, or a medium and high frequency antenna radiator, or an ultra high frequency antenna radiator when divided into the operating frequency band of the antenna radiator 10. Wherein, the low frequency includes the frequency channel less than or equal to 1GHz, the medium and high frequency includes the frequency channel more than 1GHz and less than 3GHz, and the ultrahigh frequency includes the frequency channel more than or equal to 3 GHz.
The number of the antenna radiators 10 is not particularly limited in the present application. In one possible embodiment, the number of antenna radiators 10 may be one. In another possible embodiment, the number of antenna radiators 10 may be multiple, including but not limited to two, or three, or four, or five, etc.
The transceiver 20 includes a transmitter and a receiver. The transmitter is used for transmitting radio frequency signals. The power amplifier 202 is used to amplify the radio frequency signal transmitted by the transmitter. The filter 204 is used to filter out interference and spurious signals from the signal amplified by the power amplifier 202. The transmitter, the power amplifier 202, the first transmission line 203, the filter 204, and the second transmission line 205 form a transmission path. Of course, the radio frequency system 100 may also include a receive path. The receiver, low noise amplifier, etc. may form a receive path.
The Power Amplifier 202 (PA) is the most energy-consuming device in the radio frequency system 100, and the efficiency, power, gain, etc. of the Power Amplifier 202 play a key role in determining the transmission performance and cost of the device. The power amplifier 202 faces efficiency and linearity issues as a typical nonlinear device. On the one hand, the efficiency increases with the increase of power, but the linearity decreases, so that the amplitude-amplitude (AM-AM) distortion characteristic and the amplitude-phase (AM-PM) distortion characteristic exist due to the nonlinearity and the memory effect of the power amplifier 202 when the power amplifier operates in the high-efficiency region, thereby increasing the error rate of the demodulation signal in the communication process and causing out-of-band spectrum leakage, interfering with the adjacent channel communication, and making demodulation of the receiver difficult. On the other hand, if the linearity of the power amplifier 202 is ensured, this means a high back-off of power, and the efficiency and output power of the power amplifier 202 are reduced, which causes problems of cost and heat dissipation.
The filter 204 may cause distortion in the amplitude of the signal due to its passband unevenness (e.g., ripple) and thus may result in erroneous decisions on the nonlinear characteristics of the power amplifier 202, resulting in overcompensation or undercompensation. After the rf signal output from the transceiver 20 is amplified by the power amplifier 202, the power amplifier 202 amplifies all the input signals, so that the components of the nonlinear input signals are amplified by the power amplifier 202, and the nonlinear signal output by the power amplifier 202 is a superposition of the nonlinearity of the power amplifier 202 and the amplification of the input nonlinear signals, and the filter 204 filters out the out-of-band distortion components (such as harmonics and intermodulation products) output by the power amplifier 202, so that a part of the nonlinear information of the power amplifier 202 is lost in the signal after the filter 204, and the sideband effect of the problem on the filter 204 is more obvious.
In order to solve the problems caused by the power amplifier 202 and the filter 204, the present application provides a radio frequency system 100, which can more precisely consider the efficiency and linearity of the power amplifier 202 in the radio frequency system 100.
Wherein the transceiver 20 is electrically connected to the input of the power amplifier 202. The transceiver 20 may be directly electrically connected to the input of the power amplifier 202 or may be indirectly electrically connected. In one possible implementation, the transceiver 20 is electrically connected to the input of the power amplifier 202 via a third transmission line. It will be appreciated that the radio frequency signal transmitted by the transceiver 20 is transmitted to the power amplifier 202 via the third transmission line.
The first transmission line 203 is electrically connected between the output of the power amplifier 202 and the input of the filter 204. It will be appreciated that the power amplifier 202 receives the radio frequency signal transmitted by the transceiver 20 and amplifies the power of the signal before it is transmitted to the filter 204 via the first transmission line 203.
The second transmission line 205 is electrically connected between the output of the filter 204 and the input of the antenna radiator 10. It can be appreciated that the filter 204 receives the rf signal amplified by the power amplifier 202, filters out interference and spurious signals, and transmits the signal to the antenna radiator 10 via the second transmission line 205.
Predistorter 30 is electrically connected in front of the input of the power amplifier 202. In one possible implementation, predistorter 30 may be electrically connected between transceiver 20 and the input of power amplifier 202. In another possible embodiment, predistorter 30 may be integrated with transceiver 20.
As shown in fig. 3, fig. 3 (a) shows a linearity curve of the rf signal output by the predistorter 30, fig. 3 (b) shows a linearity curve of the rf signal output by the power amplifier 202, and fig. 3 (c) shows a linearity curve of the rf signal output by the power amplifier 202 after being compensated by the predistorter 30. Predistorter 30 is used to compensate for the non-linear characteristics of the power amplifier 202. Specifically, the predistorter 30 obtains the radio frequency signal output by the power amplifier 202 through the first feedback receiving line 401, so as to determine the nonlinear characteristic of the power amplifier 202, and adjusts the radio frequency signal transmitted by the transceiver 20 to the power amplifier 202, so as to obtain a linearly amplified radio frequency signal at the output end of the power amplifier 202. The nonlinear characteristic of the predistorter 30 is inverse to the nonlinear characteristic of the power amplifier 202, i.e., the nonlinear characteristic of the predistorter 30 and the nonlinear characteristic of the power amplifier 202 compensate each other, so that the linear amplification effect is exhibited after the combination of the two.
The first feedback receiving line 401 is a feedback circuit for realizing the nonlinear characteristic acquisition of the power amplifier 202. One end of the first feedback reception line 401 is coupled to the first transmission line 203, and the other end of the first feedback reception line 401 is electrically connected to the predistorter 30. The first feedback reception line 401 and the first transmission line 203 may be directly coupled, or may be indirectly coupled, and the first feedback reception line 401 and the predistorter 30 may be directly electrically connected, or may be indirectly electrically connected.
The second feedback receiving line 501 is a feedback circuit for realizing signal acquisition at the input end of the antenna radiator 10. One end of the second feedback receiving line 501 is coupled to the second transmission line 205, and the other end of the second feedback receiving line 501 is electrically connected to the transceiver 20. The second feedback receive line 501 and the second transmit line 205 may be directly coupled, or may be indirectly coupled, and the second feedback receive line 501 and the transceiver 20 may be directly electrically connected, or may be indirectly electrically connected.
The radio frequency system 100 provided by the application comprises an antenna radiator 10, a transceiver 20, a transmitting circuit, a predistorter 30, a first feedback receiving circuit 401 and a second feedback receiving circuit 501, wherein the transmitting circuit comprises a power amplifier 202, a first transmission circuit 203, a filter 204 and a second transmission circuit 205, the transceiver 20 is electrically connected with the input end of the power amplifier 202, the first transmission circuit 203 is electrically connected between the output end of the power amplifier 202 and the input end of the filter 204, the second transmission circuit 205 is electrically connected between the output end of the filter 204 and the input end of the antenna radiator 10, the predistorter 30 is electrically connected before the input end of the power amplifier 202 and is used for compensating nonlinear characteristics of the power amplifier 202, one end of the first feedback receiving circuit 401 is coupled with the first transmission circuit 203, the other end of the first feedback receiving circuit 401 is electrically connected with the predistorter 30, one end of the second feedback receiving line 501 is coupled to the second transmission line 205, and the other end of the second feedback receiving line 501 is electrically connected to the transceiver 20, so that the first feedback receiving line 401 is coupled to the rear end of the power amplifier 202, and the front end of the filter 204, so that the signal fed back by the first feedback receiving line 401 does not participate in the filter 204, the predistorter 30 can be prevented from misjudging the nonlinearity of the power amplifier 202, causing overcompensation or undercompensation on the nonlinearity of the power amplifier 202, that is, the linearity of the power amplifier 202 can be compensated more accurately, the second feedback receiving line 501 is coupled to the rear end of the filter 204, and the front end of the antenna radiator 10, so that the signal fed back by the second feedback receiving line 501 is closer to the signal at the input end of the antenna radiator 10, which is beneficial to ensuring the accuracy of power regulation, thereby achieving a precise balance of efficiency and linearity of the power amplifier 202.
Referring to fig. 4 and fig. 5, fig. 4 is a schematic structural diagram of the rf system 100 shown in fig. 1 including the first coupler 402 and the second coupler 502, and fig. 5 is a schematic structural diagram of the rf system 100 shown in fig. 2 including the first coupler 402 and the second coupler 502. In a possible implementation, the radio frequency system 100 further includes a first coupler 402 and a second coupler 502, the first feedback receive line 401 is coupled to the first transmit line 203 by the first coupler 402, and the second feedback receive line 501 is coupled to the second transmit line 205 by the second coupler 502.
In one possible embodiment, referring to fig. 6 and 7, the first transmission line 203 includes a first sub-transmission line 230 and a second sub-transmission line 231, the first coupler 402 includes a first electrical connection port a, a second electrical connection port B, a third electrical connection port C and a fourth electrical connection port D, the first sub-transmission line 230 is electrically connected between the first electrical connection port a and the output end of the power amplifier 202, the second sub-transmission line 231 is electrically connected between the second electrical connection port B and the input end of the filter 204, the first feedback receiving line 401 is electrically connected between the third electrical connection port C and the predistorter 30, and the fourth electrical connection port D is grounded.
The second transmission line 205 includes a third sub-transmission line 250 and a fourth sub-transmission line 251, the second coupler 502 includes a fifth electrical connection port E, a sixth electrical connection port F, a seventh electrical connection port G and an eighth electrical connection port H, the third sub-transmission line 250 is electrically connected between the fifth electrical connection port E and the output end of the power amplifier 202, the fourth sub-transmission line 251 is electrically connected between the sixth electrical connection port F and the input end of the filter 204, the second feedback receiving line 501 is electrically connected between the seventh electrical connection port G and the transceiver 20, and the eighth electrical connection port H is grounded.
Of course, in other possible embodiments, the rf signal on the first transmission line 203 may be coupled to the first coupler 402 and then coupled to the first feedback receiving line 401 through the first coupler 402, and the rf signal on the second transmission line 205 may be coupled to the second coupler 502 and then coupled to the second feedback receiving line 501 through the second coupler 502. In this embodiment, the first transmission line 203 is coupled between the first electrical connection port a and the second electrical connection port B of the first coupler 402, the third electrical connection port C of the first coupler 402 is electrically connected to the first feedback receiving line 401, the second transmission line 205 is coupled between the fifth electrical connection port E and the sixth electrical connection port F of the second coupler 502, and the seventh electrical connection port G of the second coupler 502 is electrically connected to the second feedback receiving line 501.
In this embodiment, the first feedback receiving line 401 is coupled to the first transmission line 203 through the first coupler 402, and the second feedback receiving line 501 is coupled to the second transmission line 205 through the second coupler 502, which is beneficial to achieve good isolation and impedance matching effects of the radio frequency system 100.
In one possible implementation, referring to fig. 2, 5 and 7, the transceiver 20 is integrated with the predistorter 30. The predistorter 30 comprises, among other things, a Digital Predistortion (DPD) circuit. It will be appreciated that the transceiver 20 is integral with the predistorter 30.
This embodiment facilitates the transceiver 20 and the predistorter 30 to be electrically connected to the power amplifier 202 through the same transmit port N, and the transceiver 20 and the predistorter 30 to be electrically connected to the first feedback receive line 401 and the second feedback receive line 501 through the same feedback port M. In addition, the integration of the transceiver 20 with the predistorter 30 can also improve the efficiency of operation of the radio frequency system 100, save space, and improve package reliability.
Of course, in other possible embodiments, referring to fig. 1, 4 and 6, the predistorter 30 may be electrically connected between the transmit port of the transceiver 20 and the input of the power amplifier 202, and the transmit port of the transceiver 20 and the output port of the predistorter 30 may be different. In this embodiment, the radio frequency signal transmitted by the transceiver 20 is transmitted to the power amplifier 202 via the predistorter 30.
Whether or not the transceiver 20 and the predistorter 30 are integrated, the predistorter 30 needs to perform nonlinear processing on the radio frequency signal transmitted by the transceiver 20 based on the signal fed back by the first feedback receiving circuit 401, so that the nonlinear characteristic of the processed radio frequency signal can be cancelled with the nonlinear characteristic of the power amplifier 202, and thus a linearly amplified radio frequency signal is obtained at the output end of the power amplifier 202.
In one possible implementation, referring to fig. 2, 5 and 7, the transceiver 20 includes a feedback port M, the radio frequency system 100 further includes a switch 60, a fixed end of the switch 60 is electrically connected to the feedback port M, and a selection end of the switch 60 is electrically connected to and switched between the other end of the first feedback receiving line 401 and the other end of the second feedback receiving line 501.
It will be appreciated that the first feedback receive line 401 shares the same feedback port M as the second feedback receive line 501. When the selection end of the switch 60 is connected to the first feedback receiving line 401, the first feedback receiving line 401 may feed back information carrying the nonlinear characteristic of the power amplifier 202 to the predistorter 30, so that the predistorter 30 can compensate for the nonlinearity of the power amplifier 202. When the selection end of the switch 60 is connected to the second feedback receiving line 501, the second feedback receiving line 501 may feed back information carrying the power of the radio frequency signal to the transceiver 20, so that the transceiver 20 can adjust the power of the transmitted radio frequency signal in real time, and the power amplifier 202 operates in a high efficiency area.
The setting of the switch 60 in this embodiment can realize the switching between the first feedback receiving line 401 and the second feedback receiving line 501, so that the first feedback receiving line 401 and the second feedback receiving line 501 can conveniently operate in different time periods, and the transceiver 20 and the predistorter 30 share the same feedback port M, which is beneficial to improving the integration level of the radio frequency system 100 and simplifying the structure of the radio frequency system 100.
Of course, in other possible embodiments, the radio frequency system 100 may include a first feedback port through which the other end of the first feedback receiving line 401 may be electrically connected to the predistorter 30, and a second feedback port through which the other end of the second feedback receiving line 501 may be electrically connected to the transceiver 20. In this embodiment, the first feedback port and the second feedback port are provided independently.
In addition, the present embodiment may provide a first switch between the first feedback port and the first feedback reception line 401 to control the switching of the feedback loop formed by the predistorter 30 and the first feedback reception line 401. A second switch may be provided between the second feedback port and the second feedback receive line 501 to control the switching of the feedback loop formed by the transceiver 20 and the second feedback receive line 501.
In one possible embodiment, as shown in fig. 8, the radio frequency system 100 further includes a controller 70, where the controller 70 is electrically connected to the switch 60, and the controller 70 controls the switch 60 based on a time division control principle.
Specifically, the controller 70 controls the selection terminal of the switching switch 60 to be turned on with the first feedback receiving line 401 at a first preset time. The controller 70 controls the selection terminal of the switching switch 60 to be turned on with the second feedback receiving line 501 at a second preset time.
The first preset time and the second preset time may be stored in advance, so as to be called by the controller 70.
In one possible embodiment, the first preset time may include a plurality of first sub-preset times spaced apart, and the second preset time may be interspersed within the interval time between the plurality of first sub-preset times.
The controller 70 controls the changeover switch 60, so that the first feedback receiving line 401 and the second feedback receiving line 501 can be automatically controlled to change over feedback.
Referring to fig. 2, 5 and 7, in one possible embodiment, the transceiver 20 includes a transmitting port N, the transceiver 20 is electrically connected to the input terminal of the power amplifier 202 through the transmitting port N, and the predistorter 30 is electrically connected to the input terminal of the power amplifier 202 through the transmitting port N.
It will be appreciated that when the transceiver 20 is integrated with the predistorter 30, the transceiver 20 and the predistorter 30 may share the same transmit port N. The radio frequency signal transmitted by the transmitter is processed by the predistorter 30 and then transmitted to the power amplifier 202 through the transmission port N.
The transceiver 20 and the predistorter 30 in this embodiment share the same transmitting port N, which is beneficial to improving the integration level of the radio frequency system 100 and simplifying the structure of the radio frequency system 100.
In one possible implementation, the antenna radiator 10 supports one of cellular communication, WIFI communication, satellite communication.
Alternatively, the antenna radiator 10 supports cellular communication, or the antenna radiator 10 supports WIFI communication, or the antenna radiator 10 supports satellite communication.
In one possible implementation, the radio frequency system 100 includes a plurality of the antenna radiators 10, a plurality of the transmitting circuits, a plurality of the first feedback receiving lines 401, and a plurality of the second feedback receiving lines 501.
In other words, the radio frequency system 100 comprises at least two antenna radiators 10, at least two of said transmitting circuits, at least two of said first feedback receiving lines 401 and at least two of said second feedback receiving lines 501.
In a possible embodiment, the radio frequency system 100 includes the same number of antenna radiators 10, the same number of transmitting circuits, the same number of first feedback receiving lines 401, and the same number of second feedback receiving lines 501. In this embodiment, a first feedback receiving line 401 is coupled between the output end of a power amplifier 202 and the input end of a filter 204, and a second feedback receiving line 501 is coupled between the output end of the filter 204 and the input end of an antenna radiator 10, i.e. one end of the first feedback receiving line 401 is coupled to a first transmission line 203, and one end of the second feedback receiving line 501 is coupled to a second transmission line 205.
This embodiment is advantageous for implementing Multiple-Input Multiple-Out-put (MIMO) wireless communication technology.
In addition, as shown in fig. 9, the application also provides a terminal 1000. Terminal 1000 can be a mobile terminal including, but not limited to, a cell phone, tablet, watch, bracelet, etc. In the embodiment of the present application, terminal 1000 is exemplified by a mobile phone. Terminal 1000 includes a device body 11 and radio frequency system 100 according to any of the embodiments described above. The radio frequency system 100 is provided on the apparatus main body 11.
In one possible embodiment, the device body 11 may include a display screen and a housing. An accommodating space is formed between the display screen and the housing, the transceiver 20, the transmitting circuit, the predistorter 30, the first feedback receiving circuit 401 and the second feedback receiving circuit 501 of the radio frequency system 100 can be disposed in the accommodating space, and further, the device main body 11 can include a circuit board disposed in the accommodating space, and the transceiver 20, the transmitting circuit, the predistorter 30, the first feedback receiving circuit 401 and the second feedback receiving circuit 501 of the radio frequency system 100 can be disposed on the circuit board. The antenna radiator 10 of the radio frequency system 100 may be disposed in the receiving space or may be integrated on the housing.
Furthermore, the application also provides a method for regulating and controlling the radio frequency signals. Fig. 10 is a schematic flow chart of a method for adjusting and controlling a radio frequency signal according to an embodiment of the present application. The method for regulating and controlling the radio frequency signal is performed on the radio frequency system 100 according to any of the above embodiments, and the structures included in the radio frequency system 100 in the following embodiments are denoted by the above reference numerals. The method for regulating the radio frequency signal includes, but is not limited to, the following steps S10, S20, S30 and S40.
And S10, acquiring a first signal fed back by the first feedback receiving circuit 401.
And S20, performing predistortion processing on the transmitted radio frequency signal according to the first signal.
And S30, acquiring a second signal fed back by the second feedback receiving circuit 501.
And S40, carrying out power adjustment on the transmitted radio frequency signals according to the second signals.
Wherein step S10 and step S30 may be performed simultaneously, or step S10 may precede step S30, or step S30 may precede step S10. Step S20 and step S40 may be performed simultaneously, or step S20 may precede step S40, or step S40 may precede step S20. Step S20 follows step S10. Step S40 is located after step S30.
The first signal fed back by the first feedback receiving line 401 is a radio frequency signal transmitted after the power amplifier 202 and before the filter 204, and the first signal carries information of the nonlinear characteristic of the power amplifier 202. Pre-distortion processing of the transmitted radio frequency signal in accordance with the first signal includes inverting the non-linear characteristic of the radio frequency signal input to the power amplifier 202 with the non-linear characteristic of the power amplifier 202 itself.
The second signal fed back by the second feedback receiving circuit 501 is a radio frequency signal transmitted before the antenna radiator 10 after the filter 204, and the second signal carries power information of the radio frequency signal at the input end of the antenna radiator 10. Power adjusting the transmitted radio frequency signal according to the second signal includes reducing the power of the radio frequency signal transmitted to the power amplifier 202 or increasing the power of the radio frequency signal transmitted to the power amplifier 202.
In one possible implementation, referring to fig. 10 and 11, step S10 includes, but is not limited to, the following step S101.
And S101, acquiring a first signal fed back by the first feedback receiving line 401 at a first preset time.
In one possible implementation, referring to fig. 10 and 11, step S30 includes, but is not limited to, the following step S301.
And S301, acquiring a second signal fed back by the second feedback receiving line 501 at a second preset time.
The first preset time and the second preset time can be stored in advance so as to be conveniently and directly called when needed.
In one possible embodiment, the first preset time may include a plurality of first sub-preset times spaced apart, and the second preset time may be interspersed within the interval time between the plurality of first sub-preset times. In other words, the first signal may be fed back through the first feedback reception line 401 during the idle time of the second feedback reception line 501.
The working time of the first feedback receiving circuit 401 and the second feedback receiving circuit 501 is controlled based on the time division control principle, and the method has the characteristics of simple control and low implementation cost.
The features mentioned in the description, the claims and the drawings may be combined with one another at will as far as they are relevant within the scope of the application. The advantages and features described with respect to radio frequency system 100 apply in a corresponding manner to terminal 1000, the method of conditioning radio frequency signals.
While embodiments of the present application have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and alternatives to the above embodiments may be made by those skilled in the art within the scope of the application, which is also to be regarded as being within the scope of the application.
Claims (10)
1. A radio frequency system, comprising:
An antenna radiator;
A transceiver;
The transmitting circuit comprises a power amplifier, a first transmission line, a filter and a second transmission line, wherein the input end of the power amplifier is electrically connected with the transceiver, the first transmission line is electrically connected between the output end of the power amplifier and the input end of the filter, and the second transmission line is electrically connected between the output end of the filter and the input end of the antenna radiator;
a predistorter, which is electrically connected to the input end of the power amplifier, and is used for compensating the nonlinear characteristic of the power amplifier;
A first feedback receiving line having one end coupled to the first transmission line and the other end electrically connected to the predistorter, and
And one end of the second feedback receiving line is coupled with the second transmission line, and the other end of the second feedback receiving line is electrically connected with the transceiver.
2. The radio frequency system of claim 1, further comprising a first coupler through which the first feedback receive line is coupled with the first transmission line and a second coupler through which the second feedback receive line is coupled with the second transmission line.
3. The radio frequency system of claim 1, wherein the transceiver is integrated with the predistorter.
4. The radio frequency system according to claim 3, wherein the transceiver comprises a feedback port, the radio frequency system further comprises a switch, a fixed end of the switch is electrically connected to the feedback port, and a selection end of the switch is electrically connected between the other end of the first feedback receiving line and the other end of the second feedback receiving line.
5. The radio frequency system of claim 4, further comprising a controller electrically connected to the switch, the controller controlling the switch based on a time division control principle.
6. A radio frequency system according to claim 3, wherein the transceiver comprises a transmit port through which the transceiver is electrically connected to the input of the power amplifier, and the predistorter is electrically connected to the input of the power amplifier through the transmit port.
7. The radio frequency system of claim 1, wherein the antenna radiator supports one of cellular communication, WIFI communication, satellite communication.
8. A terminal comprising an apparatus main body and the radio frequency system according to any one of claims 1 to 7, the radio frequency system being provided on the apparatus main body.
9. A method of controlling a radio frequency signal, performed in a radio frequency system according to any one of claims 1 to 7, comprising:
acquiring a first signal fed back by the first feedback receiving circuit;
pre-distortion processing is carried out on the transmitted radio frequency signals according to the first signals;
acquiring a second signal fed back by the second feedback receiving circuit;
and carrying out power adjustment on the transmitted radio frequency signals according to the second signals.
10. The method of claim 9, wherein the step of determining the position of the substrate comprises,
The obtaining the first signal fed back by the first feedback receiving circuit includes:
acquiring a first signal fed back by the first feedback receiving circuit when a first preset time is reached;
Acquiring a second signal fed back by the second feedback receiving circuit, including:
and acquiring a second signal fed back by the second feedback receiving circuit at a second preset time.
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|---|---|---|---|
| CN202510652847.6A CN120528443A (en) | 2025-05-20 | 2025-05-20 | Radio frequency system, terminal, and radio frequency signal control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510652847.6A CN120528443A (en) | 2025-05-20 | 2025-05-20 | Radio frequency system, terminal, and radio frequency signal control method |
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| CN202510652847.6A Pending CN120528443A (en) | 2025-05-20 | 2025-05-20 | Radio frequency system, terminal, and radio frequency signal control method |
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