Control method of radio frequency system, radio frequency system and terminal device

Abstract

This application discloses a control method, a radio frequency (RF) system, and a terminal device, relating to the field of RF technology. The RF system includes an RF front-end circuit, an adjustable matching network, and an antenna, wherein the adjustable matching network is coupled between the RF front-end circuit and the antenna. The method includes: determining the antenna state corresponding to the antenna; when the antenna state is an impedance change state, performing impedance detection on the antenna based on the RF signal passing through the antenna to obtain impedance detection information; and performing tuning processing on the RF system using the adjustable matching network based on the impedance detection information. This application can solve the technical problem of how to improve the RF performance of an RF system.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and in particular to control methods for radio frequency systems, radio frequency systems, and terminal equipment. Background Technology

[0002] Currently, an RF system may include an RF front-end circuit, a matching network, and an antenna. The RF front-end circuit and the antenna are connected through a matching network, which is used to ensure impedance matching between the RF front-end circuit and the antenna.

[0003] However, the matching network currently in use has a fixed impedance value. This makes it easy for impedance mismatch to occur between the RF front-end circuit and the antenna when the antenna impedance changes due to changes in the external environment, resulting in poor RF performance of the RF system. Summary of the Invention

[0004] The main objective of this application is to provide a control method, a radio frequency system, and a terminal device for a radio frequency system, aiming to solve the technical problem of how to improve the radio frequency performance of a radio frequency system.

[0005] To achieve the above objectives, this application provides a control method for a radio frequency (RF) system, the RF system including an RF front-end circuit, an adjustable matching network, and an antenna, wherein the adjustable matching network is coupled between the RF front-end circuit and the antenna; the method includes: Determine the antenna state corresponding to the antenna; When the antenna is in an impedance change state, impedance detection is performed on the antenna based on the radio frequency signal passing through the antenna to obtain impedance detection information; Based on the impedance detection information, the radio frequency system is tuned using the adjustable matching network.

[0006] In addition, to achieve the above objectives, this application also provides a radio frequency system, which includes a radio frequency front-end circuit, an adjustable matching network, an impedance detection module, an antenna, and a controller. The adjustable matching network is coupled between the radio frequency front-end circuit and the antenna, the impedance detection module is connected to the antenna, and the controller is connected to both the adjustable matching network and the impedance detection module. The controller is used to determine the antenna state corresponding to the antenna, and when the antenna state is an impedance change state, it sends an impedance detection command to the impedance detection module. The impedance detection module is used to perform impedance detection on the antenna based on the radio frequency signal passing through the antenna after receiving the impedance detection command, obtain impedance detection information, and report the impedance detection information to the controller. The controller is also configured to send an impedance adjustment command to the adjustable matching network based on the impedance detection information; The adjustable matching network is used to adjust its own impedance after receiving the impedance adjustment command in order to perform tuning processing on the radio frequency system.

[0007] In addition, to achieve the above objectives, this application also provides a terminal device, the terminal device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the control method of the radio frequency system as described above.

[0008] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the control method for the radio frequency system as described above.

[0009] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the control method for the radio frequency system as described above.

[0010] In this application, the radio frequency (RF) system includes an RF front-end circuit, an adjustable matching network, and an antenna. The adjustable matching network is coupled between the RF front-end circuit and the antenna. This allows the antenna state to be determined first. Then, when the antenna state changes, an impedance detection process is triggered based on the RF signal data corresponding to the antenna, thereby obtaining impedance detection information. Based on the impedance detection information, the impedance corresponding to the adjustable matching network can be quantitatively adjusted to achieve tuning of the RF system. Thus, this application enables flexible adjustment of the adjustable matching network when the antenna state changes (e.g., due to external environmental influences), i.e., tuning is performed. This ensures accurate impedance matching between the RF front-end circuit and the antenna regardless of changes in the external environment that cause changes in antenna impedance. The impedance matching between the RF front-end circuit and the antenna is largely unaffected by changes in the external environment, thereby improving the RF performance of the RF system. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0012] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0013] Figure 1 This is a flowchart illustrating a control method for a radio frequency system in one embodiment of this application; Figure 2 This is a schematic diagram of the module composition architecture of a radio frequency system in one embodiment of this application; Figure 3 This is a schematic diagram of the process of impedance detection of the antenna based on the radio frequency signal passing through the antenna in the control method of the radio frequency system in one embodiment of this application; Figure 4 This is a schematic diagram of the process of using an adjustable matching network to tune a radio frequency system in one embodiment of this application; Figure 5 As one embodiment of this application A schematic diagram of the network structure of an adjustable matching network with a type-shaped structure; Figure 6 This is a schematic diagram of the electronic device structure of the hardware operating environment involved in the control method of the radio frequency system in one embodiment of this application.

[0014] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0015] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0016] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0017] It should be noted that the executing entity of this embodiment may include, but is not limited to, a server, a computer, or any terminal device capable of performing the above functions. This embodiment does not specifically limit this.

[0018] Currently, an RF system may include an RF front-end circuit, a matching network, and an antenna. The RF front-end circuit and the antenna are connected through a matching network, which is used to ensure impedance matching between the RF front-end circuit and the antenna.

[0019] However, the matching network currently in use has a fixed impedance value. This makes it easy for impedance mismatch to occur between the RF front-end circuit and the antenna when the antenna impedance changes due to changes in the external environment, resulting in poor RF performance of the RF system.

[0020] In some embodiments, although a matching network based on an RF switch can be set between the RF front-end circuit and the antenna, the adjustable state of the matching network based on the RF switch is limited. It can only control the corresponding RF switch to be turned off or on based on a limited number of frequency bands, thereby achieving impedance matching adjustment between the RF front-end circuit and the antenna. It is difficult to perform impedance matching adjustment accurately and quickly, which will also affect the RF performance of the RF system.

[0021] To address this, this embodiment provides a control method for a radio frequency system, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the control method for the radio frequency (RF) system proposed in this embodiment. The RF system includes an RF front-end circuit, an adjustable matching network, and an antenna, wherein the adjustable matching network is coupled between the RF front-end circuit and the antenna. The control method for this RF system includes steps 202 to 206: Step 202: Determine the antenna state corresponding to the antenna.

[0022] As an example, refer to Figure 2 , Figure 2 The diagram illustrates the modular architecture of the radio frequency (RF) system in this embodiment. The RF system includes an RF front-end circuit, an adjustable matching network, an antenna, an environmental sensing unit, a controller, and an impedance detection module. The adjustable matching network is coupled between the RF front-end circuit and the antenna. The impedance detection module detects the antenna's impedance. The environmental sensing unit senses the external environment in which the RF system operates and outputs environmental sensing parameters. The controller adjusts the adjustable matching network to tune the RF system. The environmental sensing unit can be various types of sensors, such as proximity sensors, grip sensors, and temperature sensors.

[0023] The antenna state can be either an impedance change state or an impedance constant state. It should be noted that whether the antenna impedance changes is usually closely related to the external environment. For example, if the temperature of the external environment changes significantly, the antenna may be in an impedance change state. When the antenna is blocked because the user is gripping the terminal device, the antenna may also be in an impedance change state.

[0024] As an example, a radio frequency system includes an environment sensing unit; determining the antenna state corresponding to the antenna includes: Obtain the environmental sensing parameters output by the environmental sensing unit; detect the antenna status corresponding to the antenna based on the environmental sensing parameters.

[0025] Specifically, the environmental sensing parameters output by the environmental sensing unit are obtained; environmental sensing features are extracted from the environmental sensing parameters; and the antenna state corresponding to the antenna is detected based on these environmental sensing features. For example, assuming the environmental sensing unit includes multiple sensors, the detection value sequences output by each sensor can be obtained, and each detection value sequence can be converted into an embedding vector to obtain multiple embedding vector features. Then, the multiple embedding vector features can be fused to obtain the target fused feature. The fusion method can be concatenation or averaging, etc. Then, the target fused feature can be mapped to the corresponding classification label. This classification label can identify the antenna features. For example, when the classification label is set to 1, the antenna state is identified as an impedance change state; when the classification label is set to 0, the antenna state is identified as an impedance constant state.

[0026] Alternatively, the detection values ​​output by each sensor can be obtained. If the detection value output by any sensor is not within the preset detection threshold range corresponding to the corresponding sensor, the antenna state is determined to be an impedance change state; if the detection values ​​output by all sensors are within the preset detection threshold range corresponding to the corresponding sensor, the antenna state is determined to be an impedance constant state.

[0027] Step 204: When the antenna is in an impedance change state, the impedance of the antenna is detected based on the radio frequency signal passing through the antenna to obtain impedance detection information.

[0028] The radio frequency signal passing through the antenna includes a first radio frequency signal from the radio frequency front-end circuit to the antenna, and a second radio frequency signal from the antenna reflection value to the radio frequency front-end circuit.

[0029] As an example, step 204 includes: when the antenna is in an impedance change state, acquiring a first radio frequency signal from the radio frequency front-end circuit to the antenna, and a second radio frequency signal from the antenna reflection value radio frequency front-end circuit; and performing impedance detection on the antenna based on the first signal characteristics of the first radio frequency signal and the second signal characteristics of the second radio frequency signal to obtain impedance detection information.

[0030] It should be noted that the first signal characteristic and the second signal characteristic can be power characteristics and phase characteristics, etc.

[0031] Step 206: Based on the impedance detection information, the radio frequency system is tuned using an adjustable matching network.

[0032] The adjustable matching network includes at least one of a variable capacitor element and a variable inductor element.

[0033] As an example, step 206 includes: determining the target capacitance value of the variable capacitor element and / or the target inductance value of the variable inductor element in the adjustable matching network based on impedance detection information; adjusting the adjustable matching network according to the target capacitance value and / or the target inductance value to tune the radio frequency system using the adjustable matching network.

[0034] In some embodiments, tuning the radio frequency system using an adjustable matching network based on impedance sensing information includes: Based on the impedance detection information, the impedance detection characteristics corresponding to the antenna are constructed; based on the impedance detection characteristics, the target tuning parameters corresponding to the antenna are generated using a model generated by preset tuning parameters; based on the target tuning parameters, the radio frequency system is tuned using an adjustable matching network.

[0035] The impedance detection information can include impedance detection values ​​detected at multiple frequency points and time points. A feature matrix is ​​constructed based on the impedance detection values ​​detected at multiple frequency points and time points in order of frequency magnitude and time sequence, and this feature matrix is ​​used as the impedance detection feature. The impedance detection feature is input into a preset tuning parameter generation model, which outputs the target tuning parameters corresponding to the antenna. Then, the radio frequency system can be tuned using an adjustable matching network based on the target tuning parameters. It should be noted that the preset tuning parameter generation model can be a neural network model, which consists of multiple convolutional layers, multiple pooling layers, and fully connected layers.

[0036] In this embodiment, the radio frequency (RF) system includes an RF front-end circuit, an adjustable matching network, and an antenna. The adjustable matching network is coupled between the RF front-end circuit and the antenna. This allows the antenna state to be determined first. Then, when the antenna state changes, an impedance detection process is triggered based on the RF signal data corresponding to the antenna, thereby obtaining impedance detection information. Based on the impedance detection information, the impedance corresponding to the adjustable matching network can be quantitatively adjusted to achieve tuning of the RF system. Thus, in this embodiment, when the antenna state changes (e.g., due to external environmental influences), the adjustable matching network can be flexibly adjusted accordingly, i.e., tuning is performed. This ensures accurate impedance matching between the RF front-end circuit and the antenna regardless of changes in the external environment that cause changes in antenna impedance. The impedance matching between the RF front-end circuit and the antenna is largely unaffected by changes in the external environment, thereby improving the RF performance of the RF system.

[0037] Reference Figure 3 In one feasible implementation, impedance detection is performed on the antenna based on the radio frequency signal passing through it to obtain impedance detection information, including: Step 302: Obtain the signal power information and signal phase information corresponding to the radio frequency signal.

[0038] The radio frequency (RF) signal passing through the antenna includes a first RF signal from the RF front-end circuit to the antenna, and a second RF signal from the antenna reflection value to the RF front-end circuit. The signal power information includes the transmit signal power corresponding to the first RF signal and the receive signal power corresponding to the second RF signal. The signal phase information includes the transmit signal phase corresponding to the first RF signal and the receive signal phase corresponding to the second RF signal.

[0039] Step 304: Generate impedance detection information corresponding to the antenna based on the signal power information, signal phase information, and characteristic impedance of the antenna.

[0040] Characteristic impedance is usually related to the structural parameters of the antenna. Once the structural parameters of the antenna are fixed, the characteristic impedance is usually a fixed value, such as 50 ohms.

[0041] As an example, step 304 includes: calculating the impedance amplitude information of the antenna based on the transmitted signal power and the received signal power; calculating the impedance phase information of the antenna based on the transmitted signal phase and the received signal phase; and generating the impedance detection information corresponding to the antenna based on the impedance amplitude information, the impedance phase information, and the characteristic impedance.

[0042] As an example, signal power information includes the transmitted signal power and received signal power corresponding to the antenna, and signal phase information includes the transmitted signal phase and received signal phase; based on the signal power information, signal phase information, and characteristic impedance corresponding to the antenna, impedance detection information corresponding to the antenna is generated, including: Based on the transmitted signal power and the received signal power, the amplitude of the reflection coefficient corresponding to the antenna is detected; based on the transmitted signal phase and the received signal phase, the phase of the reflection coefficient corresponding to the antenna is detected; based on the amplitude of the reflection coefficient, the phase of the reflection coefficient, and the characteristic impedance corresponding to the antenna, the impedance detection information corresponding to the antenna is generated.

[0043] Among them, the impedance amplitude information of the antenna can be the reflection coefficient amplitude, and the impedance phase information of the antenna can be the reflection coefficient phase.

[0044] Specifically, the ratio between the received signal power and the transmitted signal power is calculated, and the square root of this ratio is taken to obtain the reflection coefficient amplitude; the phase difference between the transmitted signal phase and the received signal phase is calculated, and the reflection coefficient amplitude corresponding to the antenna is determined based on this phase difference; based on the reflection coefficient amplitude, the reflection coefficient phase, and the characteristic impedance corresponding to the antenna, the impedance detection value corresponding to the antenna is calculated, and then the reflection coefficient amplitude and the impedance detection value are used together as impedance detection information.

[0045] As an example, in this embodiment, the impedance detection module can be composed of a bidirectional coupler and a receiver with phase detection function. In this way, the bidirectional coupler can acquire the first radio frequency signal from the radio frequency front-end circuit to the antenna, and the second radio frequency signal from the antenna reflection value radio frequency front-end circuit; while the receiver with phase detection function can reconstruct the amplitude and phase of the reflection coefficient based on the first radio frequency signal and the second radio frequency signal, that is, reconstruct the amplitude and phase of the reflection coefficient.

[0046] As an example, the formula for calculating the magnitude of the reflection coefficient is as follows:

[0047] in, The amplitude of the reflection coefficient. To receive signal power, This represents the transmitted signal power.

[0048] As an example, impedance sensing values ​​are typically expressed in complex form, and the formula for calculating the impedance sensing value is as follows:

[0049] in, For impedance detection information, Characteristic impedance, The reflection coefficient, The amplitude of the reflection coefficient. The phase is the reflection coefficient.

[0050] In this embodiment, the signal power information and signal phase information corresponding to the radio frequency signal passing through the antenna can be obtained first. Then, based on the signal power information, signal phase information and the characteristic impedance corresponding to the antenna, the impedance detection information corresponding to the antenna can be quantitatively calculated, which ensures the accuracy and reliability of the impedance detection information and provides data support for subsequent tuning of the radio frequency system using an adjustable matching network.

[0051] In some embodiments, refer to Figure 4 Impedance detection information includes the impedance detection value and the reflection coefficient amplitude; based on the impedance detection information, the RF system is tuned using an adjustable matching network, including: Step 402: Detect the impedance matching status between the RF front-end circuit and the antenna based on the reflection coefficient amplitude.

[0052] Step 404: Based on the impedance matching status and impedance detection value, the RF system is tuned using an adjustable matching network.

[0053] As an example, steps 402 to 404 include: detecting whether the impedance matching state between the RF front-end circuit and the antenna is in an impedance mismatch state based on the magnitude of the reflection coefficient; if the impedance matching state is in an impedance mismatch state, tuning the RF system using an adjustable matching network based on the impedance detection value.

[0054] As an example, in this embodiment, the reflection coefficient amplitude can be compared with the budgeted amplitude threshold. If the reflection coefficient amplitude is not greater than the preset amplitude threshold, it is determined that the impedance matching state between the RF front-end circuit and the antenna is not an impedance mismatch state; if the reflection coefficient amplitude is greater than the preset amplitude threshold, it is determined that the impedance matching state between the RF front-end circuit and the antenna is an impedance mismatch state.

[0055] As an example, tuning an RF system using an adjustable matching network based on impedance matching status and impedance detection values ​​includes: The impedance matching state is determined to be an impedance mismatch state; based on the impedance detection value and the circuit impedance value corresponding to the RF front-end circuit, the target impedance value corresponding to the adjustable matching network is generated; based on the target impedance value and the operating frequency of the RF system, the RF system is tuned by setting the device parameters of each electronic component in the adjustable matching network.

[0056] Each electronic device can be one or more of variable capacitors and variable inductors, and the device parameters can be capacitance and / or inductance values.

[0057] Specifically, when the impedance matching state is determined to be an impedance mismatch state, the target impedance value corresponding to the adjustable matching network is calculated based on the impedance detection value and the circuit impedance value corresponding to the RF front-end circuit; based on the target impedance value and the operating frequency of the RF system, the target capacitance value of the variable capacitor element and / or the target inductance value of the variable inductor element in the adjustable matching network are calculated; based on the target capacitance value and / or the target inductance value, the RF system is tuned by setting the device parameters of each electronic device in the adjustable matching network.

[0058] As an example, the antenna impedance can be considered as the load impedance, and the impedances of the RF front-end circuit and the adjustable matching network can be considered as the signal source impedance. According to the maximum transmitted power theorem, the load impedance must be equal to the complex conjugate of the signal source impedance. Therefore, the formula for calculating the target impedance value corresponding to the above adjustable matching network is as follows:

[0059] in, The target impedance value corresponding to the adjustable matching network. This is the conjugate of the antenna's impedance detection value. This represents the impedance of the radio frequency front-end circuit.

[0060] As an example, refer to Figure 5 , using adjustable matching network Taking the type structure as an example, the adjustable inductor L1 is the aforementioned variable inductor element, and the adjustable capacitors C1 and C2 are the aforementioned variable inductor elements. Then, the operating frequency of the RF system, the inductance value of the adjustable inductor L1, the capacitance value of the adjustable capacitor C1, the capacitance value of the adjustable capacitor C2, and the target impedance value corresponding to the adjustable matching network satisfy the following relationship:

[0061] in, The target impedance value corresponding to the adjustable matching network. The operating frequency of the radio frequency system. The inductance value of the adjustable inductor L1, The capacitance value of the adjustable capacitor C1, This is the capacitance value of the adjustable capacitor C2.

[0062] It should be noted that the structure of the adjustable matching network can be set according to specific circumstances and is not limited to the above. The impedance detection information in this embodiment includes the impedance detection value and the reflection coefficient amplitude. Based on the reflection coefficient amplitude, the impedance matching status between the RF front-end circuit and the antenna can be detected. This allows for the quantitative detection of whether impedance mismatch has occurred between the RF front-end circuit and the antenna. Consequently, in the event of impedance mismatch, the impedance detection value can be used to quantitatively adjust the device parameters of each electronic component in the adjustable matching network. This enables precise and flexible tuning of the RF system using the adjustable matching network, resulting in a wider range of impedance matching adjustments and higher accuracy.

[0063] In some embodiments, the control method for the radio frequency system further includes: The system acquires the operating frequency and bandwidth of the radio frequency system, and selects multiple reference detection frequencies based on these frequencies. For each reference detection frequency, it performs impedance detection on the antenna based on the radio frequency signal passing through it to obtain impedance detection information. Based on the impedance detection information, it uses an adjustable matching network to tune the radio frequency system, including merging the impedance detection information at all reference detection frequencies to obtain target impedance detection information, and using the adjustable matching network to tune the radio frequency system based on the target impedance detection information.

[0064] It should be noted that, in order to improve the accuracy of impedance detection in this embodiment, impedance detection can also be performed based on radio frequency signals at multiple reference frequency points.

[0065] Specifically, the following steps are taken: First, the operating frequency and bandwidth of the radio frequency system are obtained. Then, multiple reference detection frequencies are selected within the operating bandwidth, centered on the operating frequency. These reference frequencies can be evenly distributed on both sides of the corresponding frequency point within the operating bandwidth. For each reference detection frequency, the signal power and phase information of the radio frequency signal are obtained. Based on the signal power, phase, and characteristic impedance of the antenna, impedance detection information for the antenna is generated. The impedance detection information from each reference detection frequency is then merged to obtain the target impedance detection information. This merging can be achieved through averaging or other methods. Finally, based on the target impedance detection information, an adjustable matching network is used to tune the radio frequency system. In this embodiment, multiple reference detection frequencies can be selected based on the operating frequency and bandwidth of the radio frequency system. For each reference detection frequency, the signal power information and signal phase information corresponding to the radio frequency signal can be obtained. Based on the signal power information, signal phase information, and characteristic impedance of the antenna, impedance detection information corresponding to the antenna can be generated. This allows the impedance detection information of each reference detection frequency to be merged to obtain the target impedance detection information, thereby reducing the detection error of the antenna impedance detection. Based on the target impedance detection information, the radio frequency system can be tuned using an adjustable matching network, which can improve the accuracy of the radio frequency system tuning.

[0066] In some embodiments, after tuning the RF system using an adjustable matching network based on impedance detection information, the control method for the RF system further includes: The system acquires the operating status parameters of the RF system before and after tuning, including at least the uplink transmit power and downlink receive level. If the uplink transmit power after tuning is less than the uplink transmit power before tuning, and the downlink receive level after tuning is greater than the downlink receive level before tuning, the tuning effect is determined to be in line with the expected tuning effect. If the uplink transmit power after tuning is not less than the uplink transmit power before tuning, or the downlink receive level after tuning is not greater than the downlink receive level before tuning, the tuning effect is determined to be in line with the expected tuning effect. The system then returns to the step of performing impedance detection on the antenna based on the RF signal passing through the antenna to obtain impedance detection information, until the tuning effect meets the expected tuning effect.

[0067] In this embodiment, the uplink transmit power and downlink receive level of the RF system before and after tuning can also be obtained. If the uplink transmit power after tuning is less than the uplink transmit power before tuning, and the downlink receive level after tuning is greater than the downlink receive level before tuning, it is determined that the tuning effect meets the expected tuning effect, and the impedance between the antenna and the RF front-end circuit is matched and not in an impedance mismatch state. If the uplink transmit power after tuning is not less than the uplink transmit power before tuning, or the downlink receive level after tuning is not greater than the downlink receive level before tuning, it is determined that the tuning effect does not meet the expected tuning effect, and the impedance between the antenna and the RF front-end circuit is in an impedance mismatch state. Therefore, the step of performing impedance detection on the antenna based on the RF signal passing through the antenna to obtain impedance detection information can be returned until the tuning effect meets the expected tuning effect. This can realize closed-loop feedback for tuning the RF system and ensure the accuracy of tuning the RF system.

[0068] In some embodiments, after determining the antenna state corresponding to the antenna, the control method of the above-mentioned radio frequency system further includes: Determine the frequency of antenna state changes; if the frequency of state changes is not greater than a preset frequency change threshold, execute the step of performing impedance detection on the antenna based on the radio frequency signal passing through the antenna when the antenna state is in an impedance change state, and obtain impedance detection information; if the frequency of state changes is greater than the preset frequency change threshold, return to execute the step of determining the antenna state corresponding to the antenna, until the frequency of state changes is not greater than the preset frequency change threshold.

[0069] The frequency of state changes can be the number of times the antenna state changes within a preset time period, such as the number of changes within 1 minute, the number of changes within 5 minutes, etc.

[0070] Specifically, the frequency of antenna state changes is determined. If the frequency of state changes is not greater than a preset frequency threshold, it indicates that the external environment is relatively stable and the antenna state will not change frequently due to drastic changes in the external environment. In this case, when the antenna state is in an impedance change state, the impedance of the antenna is detected based on the radio frequency signal passing through the antenna to obtain impedance detection information for tuning the radio frequency system. If the frequency of state changes is greater than the preset frequency threshold, it indicates that the external environment is changing drastically. The process returns to determining the antenna state until the frequency of state changes is not greater than the preset frequency threshold, waiting for the external environment to stabilize before tuning the radio frequency system. This avoids frequent triggering of radio frequency system tuning due to drastic changes in the external environment, which could lead to poor tuning effect and excessive power consumption. Therefore, it can ensure the tuning effect of the radio frequency system and save power consumption of the radio frequency system.

[0071] It should be noted that the above embodiments / implementations are only used to assist in understanding this application and do not constitute a limitation on the control method of the radio frequency system of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0072] In addition, please refer to Figure 6 , Figure 6 This is a schematic diagram of the electronic device structure of the hardware operating environment involved in the control method of the radio frequency system in the embodiments of this application.

[0073] The aforementioned electronic device may be a terminal device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the steps of the control method of the radio frequency system in the above embodiments.

[0074] The following is for reference. Figure 6The diagram illustrates a structural schematic of an electronic device suitable for implementing embodiments of this application. The electronic devices in these embodiments may include, but are not limited to, mobile terminals such as computers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), and fixed terminals such as digital TVs and desktop computers. Figure 6 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0075] like Figure 6 As shown, the electronic device may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory 1002 or a program loaded from a storage device 1003 into a random access memory 1004. The random access memory 1004 also stores various programs and data required for the operation of the electronic device. The processing unit 1001, the read-only memory 1002, and the random access memory 1004 are interconnected via a bus 1005. An input / output interface 1006 is also connected to the bus. Typically, the following systems can be connected to the input / output interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays, speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tape, hard disks, etc.; and communication devices 1009. The communication device 1009 allows the electronic device to communicate wirelessly or wiredly with other devices to exchange data. Although the diagrams show electronic devices with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented alternatively.

[0076] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0077] The electronic device provided in this application, employing the radio frequency system control method described in the above embodiments, can solve the technical problem of how to improve the radio frequency performance of the radio frequency system. Compared with related technologies, the beneficial effects of the electronic device provided in this application are the same as those of the radio frequency system control method provided in the above embodiments, and other technical features of the electronic device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0078] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0079] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the above claims.

[0080] Furthermore, this application also provides a radio frequency (RF) system, which includes an RF front-end circuit, an adjustable matching network, an impedance detection module, an antenna, and a controller. The adjustable matching network is coupled between the RF front-end circuit and the antenna, the impedance detection module is connected to the antenna, and the controller is connected to both the adjustable matching network and the impedance detection module. The controller determines the antenna state corresponding to the antenna and, when the antenna state is in an impedance change state, sends an impedance detection command to the impedance detection module. Upon receiving the impedance detection command, the impedance detection module performs impedance detection on the antenna based on the RF signal passing through it, obtains impedance detection information, and reports the impedance detection information to the controller. The controller also sends an impedance adjustment command to the adjustable matching network based on the impedance detection information. Upon receiving the impedance adjustment command, the adjustable matching network adjusts its own impedance to perform tuning processing on the RF system.

[0081] The radio frequency (RF) system provided in this application can be deployed in the aforementioned electronic devices. The RF system provided in this application, employing the control method of the RF system in the above embodiments, can solve the technical problem of how to improve the RF performance of the RF system. Compared with related technologies, the beneficial effects of the RF system provided in this application are the same as the beneficial effects of the control method of the RF system provided in the above embodiments, and other technical features of this RF system are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0082] In addition, this application also provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to perform the steps of the control method of the radio frequency system in the above embodiments.

[0083] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory, read-only memory, erasable programmable read-only memory, optical fibers, portable compact disk read-only memory, optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, radio frequency, etc., or any suitable combination thereof.

[0084] The aforementioned computer-readable storage medium may be included in an electronic device or may exist independently without being assembled into an electronic device.

[0085] The aforementioned computer-readable storage medium carries one or more programs that, when executed by an electronic device, cause the electronic device to: determine the antenna state corresponding to the antenna; when the antenna state is an impedance change state, perform impedance detection on the antenna based on the radio frequency signal passing through the antenna to obtain impedance detection information; and, based on the impedance detection information, perform tuning processing on the radio frequency system using an adjustable matching network.

[0086] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof. These programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer, for example, via the Internet using an Internet service provider.

[0087] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0088] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0089] The computer-readable storage medium provided in this application stores computer-readable program instructions for performing the steps of the control method of the radio frequency system in the above embodiments, which can solve the technical problem of how to improve the radio frequency performance of the radio frequency system. Compared with related technologies, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the control method of the radio frequency system provided in the above embodiments, and will not be repeated here.

[0090] Furthermore, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the radio frequency system control method described in the above embodiments.

[0091] The computer program product provided in this application can solve the technical problem of how to improve the radio frequency performance of a radio frequency system. Compared with related technologies, the beneficial effects of the computer program product provided in the embodiments of this application are the same as the beneficial effects of the radio frequency system control method provided in the above embodiments, and will not be repeated here.

[0092] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for a radio frequency system, characterized in that, The radio frequency system includes a radio frequency front-end circuit, an adjustable matching network, and an antenna, wherein the adjustable matching network is coupled between the radio frequency front-end circuit and the antenna; the method includes: Determine the antenna state corresponding to the antenna; When the antenna is in an impedance change state, impedance detection is performed on the antenna based on the radio frequency signal passing through the antenna to obtain impedance detection information; Based on the impedance detection information, the radio frequency system is tuned using the adjustable matching network.

2. The method according to claim 1, characterized in that, The step of performing impedance detection on the antenna based on the radio frequency signal passing through the antenna to obtain impedance detection information includes: Obtain the signal power information and signal phase information corresponding to the radio frequency signal; Based on the signal power information, the signal phase information, and the characteristic impedance corresponding to the antenna, impedance detection information corresponding to the antenna is generated.

3. The method according to claim 2, characterized in that, The signal power information includes the transmitted signal power and received signal power corresponding to the antenna, and the signal phase information includes the transmitted signal phase and the received signal phase; The step of generating impedance detection information corresponding to the antenna based on the signal power information, the signal phase information, and the characteristic impedance corresponding to the antenna includes: Based on the transmitted signal power and the received signal power, the amplitude of the reflection coefficient corresponding to the antenna is detected; Based on the phase of the transmitted signal and the phase of the received signal, the phase of the reflection coefficient corresponding to the antenna is detected; Based on the reflection coefficient amplitude, the reflection coefficient phase, and the characteristic impedance of the antenna, impedance detection information corresponding to the antenna is generated.

4. The method according to claim 1, characterized in that, The impedance detection information includes the impedance detection value and the reflection coefficient amplitude; the step of tuning the radio frequency system using the tunable matching network based on the impedance detection information includes: Based on the reflection coefficient amplitude, the impedance matching status between the radio frequency front-end circuit and the antenna is detected; Based on the impedance matching state and the impedance detection value, the RF system is tuned using the adjustable matching network.

5. The method according to claim 4, characterized in that, The step of detecting the impedance matching status between the radio frequency front-end circuit and the antenna based on the reflection coefficient amplitude includes: If the reflection coefficient amplitude is not greater than a preset amplitude threshold, it is determined that the impedance matching state between the radio frequency front-end circuit and the antenna is not an impedance mismatch state. If the reflection coefficient amplitude is greater than a preset amplitude threshold, the impedance matching state between the radio frequency front-end circuit and the antenna is determined to be an impedance mismatch state.

6. The method according to claim 4, characterized in that, The step of tuning the radio frequency system using the adjustable matching network based on the impedance matching state and the impedance detection value includes: The impedance matching state is determined to be an impedance mismatch state; Based on the impedance detection value and the circuit impedance value corresponding to the RF front-end circuit, the target impedance value corresponding to the adjustable matching network is generated. Based on the target impedance value and the operating frequency of the radio frequency system, the radio frequency system is tuned by setting the device parameters of each electronic component in the adjustable matching network.

7. The method according to claim 1, characterized in that, The method further includes: Obtain the operating frequency and operating bandwidth corresponding to the radio frequency system, and select multiple reference detection frequency points based on the operating frequency and the operating bandwidth; For each of the reference detection frequencies, the step of performing impedance detection on the antenna based on the radio frequency signal passing through the antenna to obtain impedance detection information is executed; The step of tuning the radio frequency system using the adjustable matching network based on the impedance detection information includes: The impedance detection information at all the reference detection frequencies is merged to obtain the target impedance detection information; Based on the target impedance detection information, the radio frequency system is tuned using the adjustable matching network.

8. The method according to claim 1, characterized in that, After tuning the radio frequency system using the tunable matching network based on the impedance detection information, the method further includes: The operating state parameters of the radio frequency system before and after tuning are obtained, wherein the operating state parameters include at least the uplink transmit power and the downlink receive level; If the uplink transmit power after tuning is less than the uplink transmit power before tuning, and the downlink receive level after tuning is greater than the downlink receive level before tuning, it is determined that the tuning effect meets the expected tuning effect. If the uplink transmit power after tuning is not less than the uplink transmit power before tuning, or if the downlink receive level after tuning is not greater than the downlink receive level before tuning, it is determined that the tuning effect does not meet the expected tuning effect, and the process returns to the step of performing impedance detection on the antenna based on the radio frequency signal passing through the antenna to obtain impedance detection information, until the tuning effect meets the expected tuning effect.

9. The method according to claim 1, characterized in that, The step of tuning the radio frequency system using the adjustable matching network based on the impedance detection information includes: Based on the impedance detection information, the impedance detection characteristics corresponding to the antenna are constructed; Based on the impedance detection characteristics, the target tuning parameters corresponding to the antenna are generated using a model generated with preset tuning parameters. The radio frequency system is tuned using the tunable matching network according to the target tuning parameters.

10. The method according to claim 1, characterized in that, The radio frequency system includes an environmental sensing unit; determining the antenna state corresponding to the antenna includes: Obtain the environmental sensing parameters output by the environmental sensing unit; The antenna state corresponding to the antenna is detected based on the environmental perception parameters.

11. The method according to claim 1, characterized in that, After determining the antenna state corresponding to the antenna, the method further includes: Determine the frequency of antenna state changes; If the frequency of state changes is not greater than a preset frequency change threshold, the step of performing impedance detection on the antenna based on the radio frequency signal passing through the antenna when the antenna state is an impedance change state is executed to obtain impedance detection information. If the frequency of state changes is greater than a preset change frequency threshold, return to the step of determining the antenna state corresponding to the antenna, until the frequency of state changes is no greater than the preset change frequency threshold.

12. A radio frequency system, characterized in that, The radio frequency system includes a radio frequency front-end circuit, an adjustable matching network, an impedance detection module, an antenna, and a controller. The adjustable matching network is coupled between the radio frequency front-end circuit and the antenna, the impedance detection module is connected to the antenna, and the controller is connected to both the adjustable matching network and the impedance detection module. The controller is used to determine the antenna state corresponding to the antenna, and when the antenna state is an impedance change state, it sends an impedance detection command to the impedance detection module. The impedance detection module is used to perform impedance detection on the antenna based on the radio frequency signal passing through the antenna after receiving the impedance detection command, obtain impedance detection information, and report the impedance detection information to the controller. The controller is also configured to send an impedance adjustment command to the adjustable matching network based on the impedance detection information; The adjustable matching network is used to adjust its own impedance after receiving the impedance adjustment command in order to perform tuning processing on the radio frequency system.

13. A terminal device, characterized in that, Includes memory, processor, and the radio frequency system as described in claim 12.

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