Method and system for transmitting radio frequency signal

Abstract

Provided in the present application are a method and system for transmitting a radio frequency signal. The method comprises: generating a digital signal by means of a digital transmitter; converting the digital signal into a radio frequency signal by means of a signal conversion chain; acquiring, by means of a digital control chain and from the digital transmitter, the digital signal and system state information corresponding to the digital signal, generating a control signal on the basis of the digital signal and the system state information, and issuing the control signal; on the basis of the control signal, processing the radio frequency signal by means of a power amplifier, so as to obtain a processed radio frequency signal; and transmitting the processed radio frequency signal by means of an antenna. The solution of the present application avoids the complex design of an analog circuit, can flexibly adjust the state of a power amplifier in response to changes in scenarios such as signal bandwidth, and achieves higher accuracy and better performance, thereby satisfying requirements for low-power and high-performance radio frequency output, and thus more efficient operation can be ensured.

Description

Radio frequency signal transmission methods and systems

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510306297.2, filed on March 14, 2025, entitled "Method and System for Transmitting Radio Frequency Signals", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to a method and system for transmitting radio frequency signals. Background Technology

[0004] In wireless communication systems, power amplifiers (PAs) are used to amplify low-power radio frequency signals to high-power levels. Traditional power amplifiers consume a large amount of DC power and generate a lot of heat during amplification, resulting in low efficiency. Especially in modern wireless communication standards (such as 5G and Wi-Fi 6), complex modulation schemes (such as quadrature amplitude modulation and quadrature phase shift keying modulation) require power amplifiers to have high linearity, which further exacerbates the efficiency problem.

[0005] To address these issues, envelope tracking (ET) technology is typically employed to detect the envelope of the input or output signal and dynamically adjust the voltage or current of the power amplifier. Lower current is used for low-amplitude signals to save power, while higher current is used for high-amplitude signals to maintain linearity. This dynamic adjustment method ensures the power amplifier always operates within its efficient range, significantly improving efficiency and reducing heat generation. The effect is even more pronounced for high PAPR (Peak to Average Power Ratio) signal transmissions.

[0006] Existing envelope tracking technology is an integrated solution within analog circuits, resulting in high design complexity and requiring a complete redesign of the power amplifier circuitry. Due to the limitations of analog circuits, they cannot flexibly adjust the power amplifier's state to adapt to changes in signal bandwidth and other scenarios, thus failing to ensure more efficient operation. Furthermore, the linearity of existing solutions relies on the adjustment of the power amplifier's feedback loop itself, which cannot achieve high precision, thus failing to meet application requirements. Summary of the Invention

[0007] The purpose of this application is to provide a method and system for transmitting radio frequency signals, which avoids the complex design of analog circuits, can flexibly adjust the state of the power amplifier according to changes in signal bandwidth and other scenarios, has better accuracy and performance, achieves low power consumption and high performance radio frequency output requirements, and can ensure more efficient operation.

[0008] On one hand, this application provides a method for transmitting radio frequency signals, including:

[0009] Digital signals are generated using a digital transmitter;

[0010] The digital signal is converted into a radio frequency signal via a signal conversion link;

[0011] The digital signal and the corresponding system status information are obtained from the digital transmitter through the digital control link, and a control signal is generated and sent out using the digital signal and the system status information.

[0012] The radio frequency signal is processed by a power amplifier based on the control signal to obtain a processed radio frequency signal;

[0013] The processed radio frequency signal is transmitted through an antenna.

[0014] In one embodiment, the signal conversion link includes a digital predistortion module, a digital-to-analog conversion module, and an up-conversion module;

[0015] The process of converting the digital signal into a radio frequency signal via a signal conversion link includes:

[0016] The digital signal is compensated by the digital predistortion module to obtain the compensated digital signal;

[0017] The compensated digital signal is converted into an analog signal by the digital-to-analog conversion module.

[0018] The analog signal is upconverted by the upconversion module to obtain a radio frequency signal.

[0019] In one embodiment, the method further includes:

[0020] The feedback signal is obtained from the power amplifier through the digital predistortion module;

[0021] The digital signal is acquired from the digital transmitter via the digital predistortion module;

[0022] The digital predistortion module updates the digital predistortion lookup table based on the feedback signal, the digital signal, and historical training data; wherein the digital predistortion lookup table is used for compensation processing.

[0023] In one embodiment, updating the digital predistortion lookup table by the digital predistortion module based on the feedback signal, the digital signal, and historical training data includes:

[0024] The digital predistortion module employs the least mean square algorithm or the recursive least squares algorithm to perform real-time coefficient calculation and updates based on the feedback signal, the digital signal, and the historical training data, generating an updated digital predistortion lookup table.

[0025] In one embodiment, the digital control link includes an envelope calculation module, a lookup module, and a synchronization module;

[0026] The step of acquiring the digital signal and corresponding system status information from the digital transmitter via a digital control link, generating a control signal using the digital signal and the system status information, and then sending the control signal includes:

[0027] The envelope calculation module performs real-time envelope calculation on the digital signal to obtain the envelope index.

[0028] The lookup module searches the index-configuration table for configuration information corresponding to the envelope index, and generates a control signal using this configuration information; wherein, the index-configuration table corresponds to the system status information;

[0029] The synchronization module performs delay processing on the control signal using delay information and then sends out the delayed control signal; wherein the delay information corresponds to the system status information.

[0030] In one embodiment, the step of performing real-time envelope calculation on the digital signal through the envelope calculation module to obtain the envelope index includes:

[0031] The envelope calculation module performs real-time envelope calculation on each sampling point in the digital signal and quantizes the envelope calculation result according to a preset quantization rule to obtain the envelope index corresponding to the sampling point; wherein, the preset quantization rule includes quantizing the envelope calculation result to 5 bits to 10 bits.

[0032] In one embodiment, the digital control link includes a storage module, and the system status information includes bandwidth information and temperature information;

[0033] Before the step of searching the index-configuration table through the lookup module for configuration information corresponding to the envelope index and generating a control signal using that configuration information, the method further includes:

[0034] The storage module searches for the corresponding index-configuration table locally using the bandwidth information and the temperature information, and then passes the found index-configuration table to the search module.

[0035] In one embodiment, the system status information includes bandwidth information;

[0036] Before the synchronization module performs time delay processing on the control signal using time delay information and sends the delayed control signal, the method further includes:

[0037] The synchronization module uses the bandwidth information to look up the corresponding latency information in the local latency configuration table.

[0038] In one embodiment, the step of using the synchronization module to look up the corresponding latency information in the local latency configuration table using the bandwidth information includes:

[0039] The synchronization module selects one bandwidth information from multiple bandwidth information corresponding to the digital signal or calculates the average of the multiple bandwidth information, and looks up the corresponding latency information in the local latency configuration table.

[0040] In one embodiment, the step of processing the radio frequency signal based on the control signal using a power amplifier to obtain a processed radio frequency signal includes:

[0041] The power amplifier determines the actual power amplifier configuration based on the control signal corresponding to each sampling point in the digital signal, thereby processing the corresponding sampling points in the radio frequency signal to obtain the processed radio frequency signal.

[0042] In one embodiment, the actual power amplifier configuration includes a high-current configuration corresponding to high-amplitude sampling points and a low-current configuration corresponding to low-amplitude sampling points.

[0043] On the other hand, this application provides a radio frequency signal transmission system, including:

[0044] A digital transmitter configured to generate digital signals and provide system status information corresponding to the digital signals;

[0045] A signal conversion link, connected to the digital transmitter, is configured to convert the digital signal into a radio frequency signal;

[0046] A digital control link, connected to the digital transmitter, is configured to acquire the digital signal and system status information corresponding to the digital signal from the digital transmitter, generate a control signal using the digital signal and the system status information, and send the control signal.

[0047] A power amplifier, connected to the signal conversion link and the digital control link, is configured to process the radio frequency signal based on the control signal to obtain a processed radio frequency signal;

[0048] An antenna, connected to the power amplifier, is configured to transmit processed radio frequency signals.

[0049] In one embodiment, the signal conversion link includes a digital predistortion module, a digital-to-analog conversion module, and an up-conversion module;

[0050] The digital predistortion module is connected to the digital transmitter and is configured to perform compensation processing on the digital signal to obtain a compensated digital signal.

[0051] The digital-to-analog conversion module is connected to the digital predistortion module and is configured to convert the compensated digital signal to obtain an analog signal;

[0052] The upconversion module is connected to the digital-to-analog converter module and is configured to perform upconversion processing on the analog signal to obtain a radio frequency signal.

[0053] In one embodiment, the digital predistortion module, connected to the power amplifier, is further configured to acquire a feedback signal from the power amplifier; acquire the digital signal from the digital transmitter; and update the digital predistortion lookup table based on the feedback signal, the digital signal, and historical training data; wherein the digital predistortion lookup table is used for compensation processing.

[0054] In one embodiment, the digital control link includes an envelope calculation module, a lookup module, and a synchronization module;

[0055] The envelope calculation module is connected to the digital transmitter and is configured to perform real-time envelope calculation on the digital signal to obtain an envelope index.

[0056] The lookup module is connected to the envelope calculation module and is configured to look up configuration information corresponding to the envelope index in the index-configuration table and generate a control signal using the configuration information; wherein, the index-configuration table corresponds to the system status information;

[0057] The synchronization module is connected to the search module and is configured to perform delay processing on the control signal with delay information and send the delayed control signal; wherein the delay information corresponds to the system status information.

[0058] In one embodiment, the digital control link includes a storage module, and the system status information includes bandwidth information and temperature information;

[0059] The storage module is connected to the digital transmitter and the lookup module, and is configured to look up the corresponding index-configuration table locally using the bandwidth information and the temperature information, and then pass the found index-configuration table to the lookup module.

[0060] In another aspect, this application provides a communication system, including the aforementioned radio frequency signal transmission system.

[0061] This application's solution allows the logic for envelope calculation and control signal generation to be processed by the digital end, and works in conjunction with the analog circuit section. This avoids the complex design of analog circuits and allows for flexible adjustment of the power amplifier's state to adapt to changes in signal bandwidth and other scenarios. This results in better accuracy and performance, achieving low power consumption and high-performance RF output requirements, and ensuring more efficient operation. Attached Figure Description

[0062] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly described below.

[0063] Figure 1 is a schematic diagram of the architecture of a radio frequency signal transmission system provided in an embodiment of this application;

[0064] Figure 2 is a flowchart illustrating a method for transmitting radio frequency signals according to an embodiment of this application;

[0065] Figure 3 is a schematic diagram of envelope calculation provided in an embodiment of this application. Embodiments of the present invention

[0066] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0067] Similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0068] Referring to Figure 1, which is a schematic diagram of the architecture of a radio frequency signal transmission system provided in an embodiment of this application, as shown in Figure 1, the system may include a digital transmitter 111, a digital pre-distortion (DPD) module 112, a digital-to-analog converter (DPD) module 113, an up-conversion module (Up-Converter) 114, a power amplifier 115, an antenna 116, an envelope calculation module 117, a storage module 118, a lookup module 119, and a synchronization module 120. Among these, the digital transmitter 111, DPD module 112, envelope calculation module 117, storage module 118, lookup module 119, and synchronization module 120 are digital control modules; the DPD module 113, up-conversion module 114, power amplifier 115, and antenna 116 are analog modules.

[0069] The digital predistortion module 112, the digital-to-analog conversion module 113, and the up-conversion module 114 constitute the signal conversion link.

[0070] The envelope calculation module 117, the lookup module 119, the synchronization module 120, and the storage module 118 constitute the digital control link.

[0071] Digital transmitter 111 is configured to generate digital signals and provide system status information corresponding to the digital signals, as detailed in the relevant description below.

[0072] The signal conversion link is connected to the digital transmitter 111 and configured to convert digital signals into radio frequency signals.

[0073] The digital control link is connected to the digital transmitter 111 and is configured to acquire digital signals and corresponding system status information from the digital transmitter, generate control signals using the digital signals and system status information, and send the control signals down.

[0074] Power amplifier 115 is connected to a signal conversion link and a digital control link, and is configured to process radio frequency (RF) signals based on control signals to obtain processed RF signals. Power amplifier 115 can obtain RF signals from the signal conversion link and control signals from the digital control link, and then process the RF signals using the control signals, as detailed in the relevant description below.

[0075] Antenna 116 is connected to a power amplifier and configured to transmit processed radio frequency signals.

[0076] The RF signal transmission system provided in this solution places the envelope detection and calculation, control signal generation, and nonlinear compensation parts on the digital end, and they work together with the analog circuit part. This avoids the complex design of analog circuits and allows for flexible adjustment of the power amplifier state according to changes in signal bandwidth and other scenarios. This results in better accuracy and performance, achieving the requirements of low power consumption and high performance RF output, and ensuring more efficient operation.

[0077] In one embodiment, the digital predistortion module 112 is connected to the digital transmitter 111 and configured to perform compensation processing on the digital signal to obtain a compensated digital signal. The compensated digital signal can then be passed to the digital-to-analog converter module 113.

[0078] The digital-to-analog conversion module 113 is connected to the digital predistortion module 112 and is configured to convert the compensated digital signals into analog signals.

[0079] The upconversion module 114 is connected to the digital-to-analog converter module 113 and is configured to perform upconversion processing on the analog signal to obtain the radio frequency signal.

[0080] In this case, the signal conversion link consisting of digital predistortion module 112, digital-to-analog conversion module 113 and upconversion module 114 can convert digital signals into radio frequency signals.

[0081] In this scheme, the digital predistortion module 112 is connected to the power amplifier 115 and is configured to obtain feedback signals from the power amplifier 115 and digital signals from the digital transmitter 111. Then, based on the feedback signals, the digital signals, and historical training data, it updates the digital predistortion lookup table. The digital predistortion lookup table is used for compensation processing. The specific update process is detailed in the following description.

[0082] In this case, the digital predistortion module 112 can continuously update the local digital predistortion lookup table, so that the compensation process can achieve better results.

[0083] In one embodiment, the envelope calculation module 117 is connected to the digital transmitter 111 and configured to perform real-time envelope calculation on the digital signal to obtain the envelope index.

[0084] The lookup module 119, connected to the envelope calculation module 117, is configured to obtain the envelope index from the envelope calculation module 117, search for the configuration information corresponding to the envelope index in the index-configuration table, and generate a control signal using this configuration information. The index-configuration table corresponds to system status information. See the relevant description below for details.

[0085] Synchronization module 120, connected to lookup module 119, is configured to obtain control signals from lookup module 119, perform delay processing on the control signals using time delay information, and then send out the delayed control signals. The time delay information corresponds to system status information.

[0086] Through the above measures, control signals can be generated in the digital control link using the index-configuration table corresponding to the system status information, and then effectively sent out after a delay.

[0087] In one embodiment, the system status information includes bandwidth information. The synchronization module 120 is also connected to the digital transmitter 111, and the synchronization module 120 is further configured to obtain the bandwidth information from the digital transmitter 111 before delay processing, and look up the delay information corresponding to the bandwidth information in the local delay configuration table.

[0088] Through this measure, the synchronization module 120 can obtain the delay information in a timely manner based on the system's bandwidth information, thereby effectively performing precise delay processing on the control information.

[0089] In one embodiment, the system status information includes bandwidth information and temperature information.

[0090] The storage module 118 is connected to the digital transmitter 111 and also to the lookup module 119. It is configured to obtain bandwidth and temperature information from the digital transmitter 111, look up the corresponding index-configuration table locally using the bandwidth and temperature information, and then hand over the found index-configuration table to the lookup module 119.

[0091] Through the above measures, the storage module 118 can hand over the index-configuration table corresponding to the current system state to the lookup module 119, so that the lookup module 119 can correctly generate control signals.

[0092] One embodiment of this application provides a communication system that includes the aforementioned radio frequency signal transmitting system. The communication system may further include a radio frequency signal receiving system capable of receiving the processed radio frequency signal via an antenna.

[0093] Referring to Figure 2, which is a flowchart of a radio frequency signal transmission method provided in an embodiment of this application, as shown in Figure 2, the method may include the following steps 210-250.

[0094] Step 210: Generate digital signals using a digital transmitter.

[0095] This method is applied to the aforementioned radio frequency signal transmission system.

[0096] When it is necessary to transmit radio frequency signals, a digital transmitter can generate a Wi-Fi time-domain signal through encoding and modulation. This Wi-Fi time-domain signal is a digital signal. Furthermore, when generating the digital signal, the digital transmitter can provide system status information corresponding to the digital signal. This system status information characterizes the overall state of the transmitting system. For example, the system status information may include bandwidth information, temperature information, etc.

[0097] Step 220: Convert the digital signal into a radio frequency signal through a signal conversion link.

[0098] The digital signal generated by the digital transmitter is handed over to the signal conversion link, which converts it into a radio frequency signal.

[0099] Step 230: Obtain digital signals and corresponding system status information from the digital transmitter through the digital control link, generate control signals using the digital signals and system status information, and send the control signals down.

[0100] The digital signals generated by the digital transmitter and the system status information are handed over to the digital control link. The digital control link can then generate control signals based on the digital signals and the system status information.

[0101] The digital signal includes multiple sampling points, and a corresponding control signal is generated for each sampling point.

[0102] After the control signal is generated through the digital control link, the control signal can be sent to the power amplifier.

[0103] Step 240: The radio frequency signal is processed by a power amplifier based on the control signal to obtain the processed radio frequency signal.

[0104] Step 250: Transmit the processed radio frequency signal through the antenna.

[0105] The power amplifier processes each sample point of the radio frequency (RF) signal using control signals to obtain the processed RF signal. The processed RF signal output from the power amplifier is then transmitted through an antenna.

[0106] Through the above measures, this solution can delegate the logic of envelope calculation and control signal generation to the digital end for processing, and work in conjunction with the analog circuit section. This avoids the complex design of analog circuits and allows for flexible adjustment of the power amplifier's state to adapt to changes in signal bandwidth and other scenarios. This results in better accuracy and performance, achieving low power consumption and high-performance RF output requirements, and ensuring more efficient operation.

[0107] In one embodiment, the signal conversion link includes a digital predistortion module, a digital-to-analog converter module, and an up-conversion module. During step 220, the digital predistortion module can perform compensation processing on the digital signal to obtain a compensated digital signal. Here, the digital predistortion module can perform compensation processing on the digital signal using a local digital predistortion lookup table. After obtaining the compensated digital signal, it can be passed to the digital-to-analog converter module.

[0108] The compensated digital signal is converted into an analog signal by a digital-to-analog converter (DAC). The analog signal output from the DAC can then be fed into an up-converter module.

[0109] By upconverting the analog signal using an upconversion module, a radio frequency signal can be obtained.

[0110] Through the above measures, the signal conversion link can convert digital signals into radio frequency signals.

[0111] In one embodiment, since the power amplifier has nonlinearity and memory characteristics, and insufficient simulation accuracy after envelope tracking operation may lead to more nonlinearity and memory effects, the digital predistortion lookup table of the digital predistortion module can be continuously updated.

[0112] During radio frequency signal transmission, a digital predistortion module can obtain feedback signals from the power amplifier and digital signals from the digital transmitter. Then, based on the feedback signals, the digital signals, and historical training data, the digital predistortion lookup table is updated. This lookup table is used for compensation processing. Historical training data includes the information required for algorithm iterations, including the digital predistortion lookup table before the current update.

[0113] The digital predistortion module can use algorithms such as LMS (Least Mean Square) or RLS (Recursive Least Squares) to perform real-time coefficient calculation and updates based on feedback signals, digital signals and historical training data, and generate an updated digital predistortion lookup table.

[0114] By implementing the above measures, the digital predistortion lookup table can be continuously updated through self-training of the digital predistortion module, thereby achieving higher transmission EVM (Error Vector Magnitude) performance.

[0115] In one embodiment, the digital control link includes an envelope calculation module, a lookup module, and a synchronization module.

[0116] When executing step 230, the envelope calculation module can perform real-time envelope calculation on the digital signal to obtain the envelope index. The digital signal includes multiple sampling points. The envelope calculation module can perform real-time envelope calculation on each sampling point and quantize the result to obtain the envelope index corresponding to that sampling point. The envelope calculation module can quantize the envelope calculation result according to a preset quantization rule to obtain the envelope index. For example, the quantization rule can be to quantize the envelope calculation result to 5 bits to 10 bits; preferably, the envelope calculation result can be quantized to 7 bits to obtain the envelope index.

[0117] Referring to Figure 3, which is a schematic diagram of envelope calculation provided in an embodiment of this application, the horizontal axis of the first graph in Figure 3 represents the sampling point number in the digital signal, and the vertical axis represents the original I / Q data. The envelope calculation result is obtained through envelope calculation, as shown in the second graph of Figure 3, where the horizontal axis represents the sampling point number and the vertical axis represents the envelope. The envelope calculation result is quantized to 7 bits to obtain the envelope index, as shown in the third graph of Figure 3, where the horizontal axis represents the sampling point number and the vertical axis represents the envelope index. It can be seen that each sampling point corresponds to an envelope index.

[0118] The lookup module searches the index-configuration table for the configuration information corresponding to the envelope index and generates control signals based on this information. The index-configuration table corresponds to system status information. It includes mapping relationships between multiple envelope indices and configuration information. For example, the index-configuration table can be represented as shown in Table 1 below:

[0119]

[0120] Table 1

[0121] Because of the difference in transmission speed between the digital control link and the signal conversion link, in order for the control module to correctly use its corresponding radio frequency signal, a synchronization module can be used to delay the control signal with time delay information and then send the delayed control signal. The time delay information corresponds to the system status information.

[0122] After the power amplifier obtains the control signal corresponding to each sampling point, it can determine the actual power amplifier configuration based on the control signal, thereby processing the sampling points in the RF signal. During this process, the bias current can be changed in real time. A high-current configuration is used when the sampling point has a high amplitude to ensure linearity and gain; a low-current configuration is used when the sampling point has a low amplitude to reduce power consumption.

[0123] Through this measure, the digital control link can generate control signals and accurately send them out, achieving high-precision real-time control. Furthermore, since the time delay information is also digitally controlled, it is the result of detailed calculations and tests, which further ensures the effective processing of radio frequency signals by the control signals.

[0124] In one embodiment, the digital control link includes a storage module, and the system status information includes bandwidth information and temperature information. The storage module is pre-configured with an index-configuration table corresponding to multiple bandwidth information and multiple temperature information.

[0125] The storage module can acquire system status information corresponding to digital signals in real time. Therefore, before looking up the index-configuration table for the envelope index of any sampling point, the storage module can search for the corresponding index-configuration table locally based on the bandwidth and temperature information of the digital signal, and then pass the found index-configuration table to the lookup module. Furthermore, system status information can be acquired more intensively as needed to find the latest index-configuration table for the lookup module. For example, bandwidth and temperature information can be acquired once for each sampling point, and then the index-configuration table can be searched once.

[0126] This measure allows the system to obtain the most suitable index-configuration table in real time based on the current system status when processing various sampling points of digital information. This enables the system to generate the most suitable control signal using the index-configuration table, thereby achieving precise transmission control.

[0127] In one embodiment, the system status information includes bandwidth information, which may include signal bandwidth and system bandwidth.

[0128] Before delay processing via the synchronization module, the corresponding delay information can be found in the local delay configuration table using the bandwidth information obtained from the digital transmitter. This delay information is then used to delay the control signal. Here, the delay configuration table records the mapping relationships between multiple signal bandwidths, multiple system bandwidths, and multiple delay information. A digital signal may correspond to multiple bandwidth information; one bandwidth information is selected, or the average of multiple bandwidth information is calculated, to find the corresponding delay information.

[0129] Through this measure, the synchronization module can obtain delay information in a timely manner based on the system's bandwidth information, thereby effectively performing precise delay processing on the control information.

[0130] The apparatuses and methods disclosed in the embodiments provided in this application can also be implemented in other ways. The functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part. Industrial applicability

[0131] By applying the technical solution of this application, the complex design of analog circuits is avoided. The state of the power amplifier can be flexibly adjusted according to changes in signal bandwidth and other scenarios, resulting in better accuracy and performance. This achieves the requirements of low power consumption and high performance RF output, ensuring more efficient operation.

Claims

1. A transmission method of a radio frequency signal, characterized by, include: Digital signals are generated using a digital transmitter; The digital signal is converted into a radio frequency signal via a signal conversion link; The digital signal and the corresponding system status information are obtained from the digital transmitter through the digital control link, and a control signal is generated and sent out using the digital signal and the system status information. The radio frequency signal is processed by a power amplifier based on the control signal to obtain a processed radio frequency signal; The processed radio frequency signal is transmitted through an antenna.

2. The method of claim 1, wherein, The signal conversion link includes a digital predistortion module, a digital-to-analog conversion module, and an up-conversion module; The process of converting the digital signal into a radio frequency signal via a signal conversion link includes: The digital signal is compensated by the digital predistortion module to obtain the compensated digital signal; The compensated digital signal is converted into an analog signal by the digital-to-analog conversion module. The analog signal is upconverted by the upconversion module to obtain a radio frequency signal.

3. The method of claim 2, wherein, The method further includes: The feedback signal is obtained from the power amplifier through the digital predistortion module; The digital signal is acquired from the digital transmitter via the digital predistortion module; The digital predistortion module updates the digital predistortion lookup table based on the feedback signal, the digital signal, and historical training data; wherein the digital predistortion lookup table is used for compensation processing.

4. The method of claim 3, wherein, The step of updating the digital predistortion lookup table by the digital predistortion module based on the feedback signal, the digital signal, and historical training data includes: The digital predistortion module employs the least mean square algorithm or the recursive least squares algorithm to perform real-time coefficient calculation and updates based on the feedback signal, the digital signal, and the historical training data, generating an updated digital predistortion lookup table.

5. The method according to any one of claims 1-4, characterized in that, The digital control link includes an envelope calculation module, a lookup module, and a synchronization module; The step of acquiring the digital signal and corresponding system status information from the digital transmitter via a digital control link, generating a control signal using the digital signal and the system status information, and then sending the control signal includes: The envelope calculation module performs real-time envelope calculation on the digital signal to obtain the envelope index. The lookup module searches the index-configuration table for configuration information corresponding to the envelope index, and generates a control signal using this configuration information; wherein, the index-configuration table corresponds to the system status information; The synchronization module performs delay processing on the control signal using delay information and then sends out the delayed control signal; wherein the delay information corresponds to the system status information.

6. The method of claim 5, wherein, The step of performing real-time envelope calculation on the digital signal through the envelope calculation module to obtain the envelope index includes: The envelope calculation module performs real-time envelope calculation on each sampling point in the digital signal and quantizes the envelope calculation result according to a preset quantization rule to obtain the envelope index corresponding to the sampling point; wherein, the preset quantization rule includes quantizing the envelope calculation result to 5 bits to 10 bits.

7. The method according to claim 5 or 6, characterized in that, The digital control link includes a storage module, and the system status information includes bandwidth information and temperature information; Before the step of searching the index-configuration table through the lookup module for configuration information corresponding to the envelope index and generating a control signal using that configuration information, the method further includes: The storage module searches for the corresponding index-configuration table locally using the bandwidth information and the temperature information, and then passes the found index-configuration table to the search module.

8. The method according to any one of claims 5-7, characterized in that, The system status information includes bandwidth information; Before the synchronization module performs time delay processing on the control signal using time delay information and sends the delayed control signal, the method further includes: The synchronization module uses the bandwidth information to look up the corresponding latency information in the local latency configuration table.

9. The method of claim 8, wherein, The step of searching for the corresponding latency information in the local latency configuration table using the bandwidth information through the synchronization module includes: The synchronization module selects one bandwidth information from multiple bandwidth information corresponding to the digital signal or calculates the average of the multiple bandwidth information, and looks up the corresponding latency information in the local latency configuration table.

10. The method according to any one of claims 1-9, characterized in that, The process of processing the radio frequency signal using a power amplifier based on the control signal to obtain the processed radio frequency signal includes: The power amplifier determines the actual power amplifier configuration based on the control signal corresponding to each sampling point in the digital signal, thereby processing the corresponding sampling points in the radio frequency signal to obtain the processed radio frequency signal.

11. The method of claim 10, wherein, The actual power amplifier configurations include a high-current configuration corresponding to high-amplitude sampling points and a low-current configuration corresponding to low-amplitude sampling points.

12. A transmission system for radio frequency signals, characterised in that include: A digital transmitter configured to generate digital signals and provide system status information corresponding to the digital signals; A signal conversion link, connected to the digital transmitter, is configured to convert the digital signal into a radio frequency signal; A digital control link, connected to the digital transmitter, is configured to acquire the digital signal and system status information corresponding to the digital signal from the digital transmitter, generate a control signal using the digital signal and the system status information, and send the control signal. A power amplifier, connected to the signal conversion link and the digital control link, is configured to process the radio frequency signal based on the control signal to obtain a processed radio frequency signal; An antenna, connected to the power amplifier, is configured to transmit processed radio frequency signals.

13. The system of claim 12, wherein, The signal conversion link includes a digital predistortion module, a digital-to-analog conversion module, and an up-conversion module; The digital predistortion module is connected to the digital transmitter and is configured to perform compensation processing on the digital signal to obtain a compensated digital signal. The digital-to-analog conversion module is connected to the digital predistortion module and is configured to convert the compensated digital signal to obtain an analog signal; The upconversion module is connected to the digital-to-analog converter module and is configured to perform upconversion processing on the analog signal to obtain a radio frequency signal.

14. The system of claim 13, wherein, The digital predistortion module is connected to the power amplifier and is further configured to acquire a feedback signal from the power amplifier; acquire the digital signal from the digital transmitter; and update the digital predistortion lookup table based on the feedback signal, the digital signal, and historical training data; wherein the digital predistortion lookup table is used for compensation processing.

15. The system of any of claims 12-14, wherein, The digital control link includes an envelope calculation module, a lookup module, and a synchronization module; The envelope calculation module is connected to the digital transmitter and is configured to perform real-time envelope calculation on the digital signal to obtain an envelope index. The lookup module is connected to the envelope calculation module and is configured to look up configuration information corresponding to the envelope index in the index-configuration table and generate a control signal using the configuration information; wherein, the index-configuration table corresponds to the system status information; The synchronization module is connected to the search module and is configured to perform delay processing on the control signal with delay information and send the delayed control signal; wherein the delay information corresponds to the system status information.

16. The system of claim 15, wherein, The digital control link includes a storage module, and the system status information includes bandwidth information and temperature information; The storage module is connected to the digital transmitter and the lookup module, and is configured to look up the corresponding index-configuration table locally using the bandwidth information and the temperature information, and then pass the found index-configuration table to the lookup module.

17. A communication system, characterized by The system includes the radio frequency signal transmission system according to any one of claims 12-16.

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