A system, method, apparatus, and medium for digital power amplifier array optimization

Abstract

This application provides a system, method, apparatus, and medium for optimizing a digital power amplifier array, including an additional digital power amplifier for expanding an initial digital power amplifier array to obtain a target digital power amplifier array. A randomized rotation control module is used to select multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window at the end of each RF cycle of the target RF modulation signal, and randomly select a second digital power amplifier from the rotation window to update the amplitude control word. The updated second digital power amplifier receives the target RF modulation signal and outputs an RF signal with the corresponding amplitude according to the updated amplitude control word. The RF signals of all digital power amplifiers in the target digital power amplifier array are combined to obtain the optimized target RF signal. This application can effectively suppress image leakage and improve the purity of the output spectrum.

Description

Technical Field

[0001] This application relates to the field of digital power amplifier optimization technology, and more specifically, to a system, method, device, and medium for optimizing a digital power amplifier array. Background Technology

[0002] Digital power amplifiers are divided into multiple sub-power amplifiers, and the number of sub-power amplifiers turned on is controlled by an amplitude modulation signal to output a radio frequency signal of corresponding amplitude. This approach offers advantages such as circuit simplicity, high efficiency, and small area. However, the update rate of the amplitude control word in a digital power amplifier is much lower than the radio frequency carrier frequency, resulting in a large number of digital images in the output spectrum. To suppress these images, existing technologies employ a moving average (i.e., FIR filtering) structure: multiple digital power amplifiers update their amplitude control words sequentially at fixed times, forming an equivalent FIR filter. The zero point of this filter is designed at the center frequency of the digital images, theoretically allowing for complete image filtering.

[0003] However, in actual circuit implementations, manufacturing mismatches exist between various digital power amplifiers, meaning that the output RF energy corresponding to the same amplitude control word differs. This mismatch causes the zero point of the equivalent FIR filter to deviate from the unit circle, resulting in poor filtering performance and residual digital image energy in the output spectrum, leading to excessive out-of-band radiation and limiting the transmitter's maximum transmit power. Therefore, overcoming the image leakage problem caused by digital power amplifier mismatch has become a pressing technical challenge in this field. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a system, method, apparatus and medium for optimizing digital power amplifier arrays to overcome the problems in the prior art.

[0005] In a first aspect, embodiments of this application provide a system for optimizing a digital power amplifier array, used to optimize an initial digital power amplifier array; the initial digital power amplifier array is used to receive a target radio frequency modulation signal and generate an initial radio frequency signal of corresponding amplitude; the initial digital power amplifier array includes existing digital power amplifiers; the system includes: An additional digital power amplifier is used to expand the initial digital power amplifier array to obtain the target digital power amplifier array; A randomized rotation control module is used to select multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window at the end of each radio frequency cycle of the target radio frequency modulation signal, and randomly select a second digital power amplifier from the rotation window to update the amplitude control word; the updated second digital power amplifier receives the target radio frequency modulation signal and outputs a radio frequency signal with the corresponding amplitude according to the updated amplitude control word; the radio frequency signals of all digital power amplifiers in the target digital power amplifier array are combined to form the optimized target radio frequency signal.

[0006] In some technical solutions of this application, the number of the original digital power amplifiers is a first number, and the number of the additional digital power amplifiers is a second number, wherein the second number is less than the first number.

[0007] In some technical solutions of this application, the aforementioned randomized rotation control module includes: A random number generator is used to generate random numbers. The modulo-remainder processing unit is used to take the random number modulo the number of the first digital power amplifiers in the rotation window, and determine the second digital power amplifier based on the remainder.

[0008] In some technical solutions of this application, the number of the aforementioned original digital power amplifiers is the first quantity; The rotation window slides after a first number of RF cycles, and the slid rotation window contains a different first digital power amplifier than before the slide.

[0009] In some technical solutions of this application, the above sliding is a sequential cyclic sliding: after a first number of radio frequency cycles, the number of each first digital power amplifier in the rotation window increases by a fixed step size, and the total number of digital power amplifiers in the target digital power amplifier array is moduloed to obtain the slid-out rotation window.

[0010] In some technical solutions of this application, each digital power amplifier in the above-mentioned target digital power amplifier array includes: multiple sub-power amplifiers, the input of each sub-power amplifier being the target radio frequency modulation signal; the amplitude control word is used to control the number of sub-power amplifiers that are turned on, and the number of sub-power amplifiers that are turned on is proportional to the output amplitude.

[0011] In some technical solutions of this application, the above system also includes: The radio frequency (RF) combining network and LC filtering network are used to combine the RF signals of all digital power amplifiers in the target digital power amplifier array through the RF combining network and output the optimized target RF signal through the LC filtering network. Secondly, embodiments of this application provide a method for optimizing a digital power amplifier array, applied to the aforementioned system for optimizing a digital power amplifier array, the method comprising: The initial digital power amplifier array is expanded by adding an additional digital power amplifier to obtain the target digital power amplifier array; At the end of each RF cycle of the target RF modulation signal, the randomized rotation control module selects multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window, and randomly selects a second digital power amplifier from the rotation window to update the amplitude control word. The updated second digital power amplifier receives the target RF modulation signal and outputs an RF signal with the corresponding amplitude according to the updated amplitude control word. The RF signals of all digital power amplifiers in the target digital power amplifier array are combined to form the optimized target RF signal.

[0012] Thirdly, embodiments of this application provide an electronic device, a processor, a memory, and a bus. The memory stores machine instructions executed by the processor. When the electronic device is running, the processor communicates with the memory via the bus. When the machine instructions are executed by the processor, the steps of the above-described method for optimizing a digital power amplifier array are performed.

[0013] Fourthly, embodiments of this application provide a computer storage medium storing a computer program, which, when executed by a processor, performs the steps of the above-described method for optimizing a digital power amplifier array.

[0014] The technical solutions provided by the embodiments of this application may include the following beneficial effects: This application provides a system for optimizing a digital power amplifier array, used to optimize an initial digital power amplifier array; the initial digital power amplifier array is used to receive a target radio frequency modulation signal and generate an initial radio frequency signal with a corresponding amplitude; the initial digital power amplifier array includes existing digital power amplifiers; the system includes: an additional digital power amplifier for expanding the initial digital power amplifier array to obtain a target digital power amplifier array; a randomized rotation control module for selecting multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window at the end of each radio frequency cycle of the target radio frequency modulation signal, and randomly selecting a second digital power amplifier from the rotation window to update the amplitude control word; the updated second digital power amplifier receives the target radio frequency modulation signal and outputs a radio frequency signal with a corresponding amplitude according to the updated amplitude control word; the radio frequency signals of all digital power amplifiers in the target digital power amplifier array are merged to obtain the optimized target radio frequency signal.

[0015] This application expands the initial array by introducing additional digital power amplifiers and combines this with a randomized rotation control module that dynamically selects a rotation window at the end of each RF cycle and randomly selects a digital power amplifier to update the amplitude control word. This allows the selected digital power amplifier to perform amplitude weighting on the shared target RF modulation signal based on the updated amplitude control word, ultimately merging the RF signals from all digital power amplifiers for output. Without altering the internal structure of individual digital power amplifiers, this scheme uses a randomized update order to distribute the inherent mismatch error between digital power amplifiers throughout the entire operation process. This effectively reduces image residue in the target RF signal caused by mismatch, improves the purity of the output spectrum, and enhances out-of-band radiation characteristics, thereby allowing the transmitter to achieve higher transmit power while meeting wireless communication standards.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This illustration shows a schematic diagram of a system for optimizing a digital power amplifier array according to an embodiment of this application; Figure 2 A schematic diagram of a target digital power amplifier array provided in an embodiment of this application is shown; Figure 3 An optimized spectrum diagram provided in an embodiment of this application is shown; Figure 4 A flowchart illustrating a method for optimizing a digital power amplifier array provided in an embodiment of this application is shown. Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the accompanying drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0020] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that the term "comprising" will be used in the embodiments of this application to indicate the presence of the features declared thereafter, but does not exclude the addition of other features.

[0022] Digital power amplifiers are divided into multiple sub-power amplifiers, and the number of sub-power amplifiers turned on is controlled by an amplitude modulation signal to output a radio frequency signal of corresponding amplitude. This approach offers advantages such as circuit simplicity, high efficiency, and small area. However, the update rate of the amplitude control word in a digital power amplifier is much lower than the radio frequency carrier frequency, resulting in a large number of digital images in the output spectrum. To suppress these images, existing technologies employ a moving average (i.e., FIR filtering) structure: multiple digital power amplifiers update their amplitude control words sequentially at fixed times, forming an equivalent FIR filter. The zero point of this filter is designed at the center frequency of the digital images, theoretically allowing for complete image filtering.

[0023] However, in actual circuit implementations, manufacturing mismatches exist between various digital power amplifiers, meaning that the output RF energy corresponding to the same amplitude control word differs. This mismatch causes the zero point of the equivalent FIR filter to deviate from the unit circle, resulting in poor filtering performance and residual digital image energy in the output spectrum, leading to excessive out-of-band radiation and limiting the transmitter's maximum transmit power. Therefore, overcoming the image leakage problem caused by digital power amplifier mismatch has become a pressing technical challenge in this field.

[0024] Based on this, embodiments of this application provide a system, method, device, and medium for optimizing digital power amplifier arrays, which are described below through embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] This application provides a system for optimizing a digital power amplifier array, which optimizes an initial digital power amplifier array. The initial digital power amplifier array refers to an overall structure composed of multiple digital power amplifiers connected according to certain rules. Each digital power amplifier can independently receive a shared radio frequency carrier signal and output radio frequency energy of a corresponding amplitude according to its stored amplitude control word. Specifically, in this application, the initial digital power amplifier array is used to receive a target radio frequency modulation signal and generate an initial radio frequency signal of a corresponding amplitude accordingly. The target radio frequency modulation signal is a high-frequency carrier signal, typically at the radio frequency operating frequency, such as 2.4 GHz or 5 GHz. This signal serves as the common input of all digital power amplifiers and carries the phase information of the signal to be transmitted. The initial radio frequency signal is a synthesized radio frequency signal directly output from the initial array without the optimization processing described in this application. This signal may contain digital image spurious signals due to mismatch issues, which will be explained later.

[0026] Furthermore, the initial digital power amplifier array includes existing digital power amplifiers. Existing digital power amplifiers refer to a first number (denoted as N) of digital power amplifiers already present in the initial array before the intervention of the optimization system described in this application. These existing digital power amplifiers update their amplitude control words sequentially in a fixed time order, thereby forming an equivalent FIR filter structure. The initial design intention is to eliminate digital images in the output spectrum under ideal conditions. However, due to deviations in actual manufacturing processes, mismatches in gain, phase, or output impedance inevitably exist between the existing digital power amplifiers, causing the zero point of the FIR filter to deviate from the unit circle, resulting in significant residual image energy in the initial RF signal. To solve this problem, the system of this application introduces additional digital power amplifiers and a randomized rotation control module, which will be described in detail later, to optimize the aforementioned initial digital power amplifier array, thereby obtaining an optimized target RF signal with a cleaner spectrum.

[0027] Figure 1 A schematic diagram of a digital power amplifier array optimization system provided in an embodiment of this application is shown. The system includes an additional digital power amplifier and a randomized rotation control module.

[0028] The additional digital power amplifiers refer to multiple digital power amplifiers added to the initial digital power amplifier array in addition to the existing digital power amplifiers. These additional digital power amplifiers are identical to the existing digital power amplifiers in terms of circuit structure, operating principle, and signal interface. Each digital power amplifier internally consists of multiple sub-power amplifiers, each receiving the same target RF modulation signal as input. The amplitude control word determines the number of sub-power amplifiers activated within that digital power amplifier, and the number of activated sub-power amplifiers is proportional to the output amplitude. The number of additional digital power amplifiers can be set to a second quantity (denoted as M-1), where M represents the size of the subsequent rotation window. Figure 2 As shown.

[0029] By adding these additional digital power amplifiers, the original initial digital power amplifier array is expanded into a larger target digital power amplifier array. The total number of the target digital power amplifier array is equal to the sum of the original number of digital power amplifiers N and the number of additional digital power amplifiers (M-1), i.e., N+M-1.

[0030] The randomized rotation control module is the core component for achieving mismatch error randomization in this application. This module is triggered at the end of each RF cycle of the target RF modulation signal. The RF cycle refers to the time interval required for the target RF modulation signal to complete one full oscillation, denoted as Tlo. At the end of each RF cycle, the randomized rotation control module first dynamically selects multiple digital power amplifiers from the target digital power amplifier array to form a rotation window. Here, "multiple" means at least two, and the number of digital power amplifiers in the window is fixed at M, which is usually 3 or 4. The selection method can be sequential cyclic sliding, random selection of the window start position, or according to a pre-set rotation table.

[0031] The digital power amplifiers constituting the rotation window are referred to in this application as the first digital power amplifier; they are merely included in the current candidate set and have not yet been actually selected for updating. Subsequently, the randomized rotation control module randomly selects a digital power amplifier from this rotation window, referred to as the second digital power amplifier.

[0032] The specific implementation of random selection can be as follows: A random number generator generates a random number, and then the modulo-remainder processing unit takes the modulo of this random number with the number M of the first digital power amplifiers in the current rotation window. Based on the remainder (0 to M-1), a unique second digital power amplifier is determined from the M candidates in the window. After the second digital power amplifier is selected, the randomized rotation control module updates the amplitude control word of the second digital power amplifier, that is, writes the amplitude value required by the current system into the internal register of the digital power amplifier. After the update, the second digital power amplifier begins to use the new amplitude control word. When the target RF modulation signal is input to the second digital power amplifier, it turns on the corresponding number of sub-power amplifiers according to the updated amplitude control word, thereby outputting an RF signal with the corresponding amplitude. At the same time, the remaining unselected digital power amplifiers in the target digital power amplifier array continue to maintain the previously updated amplitude control word and still output RF signals with the corresponding amplitude. Ultimately, the RF output signals of all digital power amplifiers (including original and additional ones) in the entire target digital power amplifier array are superimposed together through an RF combining network (e.g., a passive power combining network), and the combined signal is output as the optimized target RF signal through an LC filtering network.

[0033] Since the second digital power amplifier selected in each RF cycle is randomly determined, and the probability of selecting all digital power amplifiers (whether original or additional) is approximately equal over a long period of statistical analysis, the inherent mismatch error between the digital power amplifiers no longer appears in a deterministic periodic form, but is transformed into random white noise. This causes the zeros of the equivalent FIR filter to return to the unit circle, effectively suppressing digital image leakage caused by mismatch and improving the purity of the output spectrum. Figure 3 As shown.

[0034] In an optional implementation, the number of existing digital power amplifiers is a first number, and the number of additional digital power amplifiers is a second number, wherein the second number is less than the first number. Here, the first number corresponds to the number of existing digital power amplifiers mentioned above, denoted as N, and its value determines the number of taps of the equivalent FIR filter and the basic performance of digital image suppression. The second number corresponds to the number of additional digital power amplifiers, denoted as M-1, where M is the size of the rotation window. Considering the area and power consumption of the digital power amplifier array, the number of additional digital power amplifiers should not be too large; at the same time, the white noise effect of the randomized rotation mechanism on mismatch error can be reflected when the second number is at least 1 (i.e., M≥2), and further increasing the second number has limited improvement on image suppression, but will multiply the hardware cost. Therefore, this application preferably sets the second number to be less than the first number, for example, when N=4 and M=3, the second number = 2, which is less than the first number 4. With this number configuration, chip area and power consumption can be saved to the maximum extent while ensuring that the randomization effect is sufficient to convert mismatch error into white noise, and maintaining the advantages of high efficiency and compactness of digital power amplifiers. Of course, in some application scenarios where image suppression requirements are extremely high and area budgets are ample, the second quantity can be equal to or greater than the first quantity. However, considering the balance between overall cost and performance, this application prioritizes the implementation method where the second quantity is less than the first quantity.

[0035] In an optional implementation, the rotation window slides after a first number of radio frequency cycles. The slid-out rotation window contains a different first digital power amplifier than before the slide. Here, the first number is the same as the original number of digital power amplifiers, denoted as N. The radio frequency cycle is the period Tlo of the target radio frequency modulation signal; therefore, the time length corresponding to the first number of radio frequency cycles is exactly equal to the update period Ts of the digital amplitude control word, i.e., Ts = N × Tlo. The "sliding" refers to the complete replacement of the set of M first digital power amplifiers in the rotation window according to certain rules, while the window size M remains unchanged.

[0036] For example, if the current rotation window is {1, 3, 5}, after N RF cycles, the window slides to different combinations such as {2, 4, 6} or {1, 4, 6} (where the numbers represent the digital power amplifiers numbered in a specific order), ensuring that the first digital power amplifier before and after the slide is not exactly the same. The purpose of the sliding mechanism is to ensure that during long-term operation, all digital power amplifiers (including existing and additional ones) in the target digital power amplifier array can enter the rotation window with a basically equal probability, thus having roughly equal chances of being randomly selected. If the sliding mechanism is not set, and the rotation window is fixed on the same group of M digital power amplifiers for a long time, then other digital power amplifiers not in that window will never be able to participate in randomized rotation, their mismatch error cannot be whitened, and the image suppression effect will be greatly reduced.

[0037] The choice of a sliding time interval of a first number of RF cycles is particularly significant: within each digital amplitude update cycle Ts, exactly N amplitude control word updates (each updating one DPA) need to be completed. During these N updates, the rotation window remains unchanged, thus ensuring that within each Ts cycle, the tap coefficients of the FIR filter originate from the same set of candidate DPAs, preventing disruption of the fixed timing of the FIR filter. When entering the next Ts cycle, the window slides, changing to a different set of candidate DPAs, ensuring a balanced probability of each DPA being selected over the long term. The sliding can be implemented in a sequential cyclic manner: every N Tlo cycles, each DPA number in the window is incremented by a fixed step size (e.g., 1), and then the modulo of the total number of DPAs (N+M-1) is taken to obtain a new window combination; alternatively, it can be periodically switched according to a pre-generated sliding table, or the next window can be determined randomly. Regardless of the sliding rule used, as long as the window after sliding contains a different first digital power amplifier than before sliding, the expected technical effect of this application can be achieved. Through this sliding mechanism, the randomized rotation control module not only achieves instantaneous random selection in each RF cycle, but also achieves uniform traversal of the candidate set on a longer time scale. This completely breaks down the mismatch error between the digital power amplifiers into white noise, so that the zero point of the equivalent FIR filter remains stable on the unit circle for a long time, effectively suppressing digital image leakage caused by mismatch.

[0038] Figure 4 The diagram illustrates a flowchart of a method for optimizing a digital power amplifier array according to an embodiment of this application, wherein the method includes steps S101-S102; specifically: S101. The initial digital power amplifier array is expanded by an additional digital power amplifier to obtain the target digital power amplifier array; S102. At the end of each RF cycle of the target RF modulation signal, the randomized rotation control module selects multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window, and randomly selects a second digital power amplifier from the rotation window to update the amplitude control word; the updated second digital power amplifier receives the target RF modulation signal and outputs an RF signal with the corresponding amplitude according to the updated amplitude control word; the RF signals of all digital power amplifiers in the target digital power amplifier array are combined to form the optimized target RF signal.

[0039] The number of existing digital power amplifiers is a first number, and the number of additional digital power amplifiers is a second number, which is less than the first number.

[0040] The randomized rotation control module includes: a random number generator and a modulo-residual number processing unit; The method includes generating random numbers using a random number generator; The modulo-remainder processing unit modulo the random number with the number of the first digital power amplifiers in the rotation window, and determines the second digital power amplifier based on the remainder.

[0041] The number of the original digital power amplifiers is the first quantity; The rotation window slides after a first number of RF cycles, and the slid rotation window contains a different first digital power amplifier than before the slide.

[0042] The sliding is a sequential cyclic sliding: after a first number of RF cycles, the number of each first digital power amplifier in the rotation window increases by a fixed step size, and the total number of digital power amplifiers in the target digital power amplifier array is moduloed to obtain the slid-out rotation window.

[0043] Each digital power amplifier in the target digital power amplifier array includes: multiple sub-power amplifiers, each of which receives the target radio frequency modulation signal as its input; the amplitude control word is used to control the number of sub-power amplifiers that are turned on, and the number of sub-power amplifiers that are turned on is proportional to the output amplitude.

[0044] The system further includes: a radio frequency synthesis network and an LC filter network; the radio frequency signals of all digital power amplifiers in the target digital power amplifier array are combined through the radio frequency synthesis network and output as the optimized target radio frequency signal through the LC filter network. like Figure 5As shown, this application provides an electronic device for executing the digital power amplifier array optimization method of this application. The device includes a memory, a processor, a bus, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the digital power amplifier array optimization method described above.

[0045] Specifically, the aforementioned memory and processor can be general-purpose memory and processor, without any specific limitations. When the processor runs the computer program stored in the memory, it can execute the aforementioned method for optimizing the digital power amplifier array.

[0046] Corresponding to the digital power amplifier array optimization method in this application, this application embodiment also provides a computer storage medium storing a computer program, which is executed by a processor to perform the steps of the above-described digital power amplifier array optimization method.

[0047] Specifically, the storage medium can be a general-purpose storage medium, such as a removable disk or hard disk. When the computer program on the storage medium is run, it can execute the above-mentioned method for optimizing the digital power amplifier array.

[0048] In the embodiments provided in this application, it should be understood that the disclosed systems and methods can be implemented in other ways. The system embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between systems or units may be electrical, mechanical, or other forms.

[0049] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0050] In addition, the functional units in the embodiments provided in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0051] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0052] It should be noted that similar labels 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. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A system for optimizing a digital power amplifier array, characterized in that, Used to optimize an initial digital power amplifier array; the initial digital power amplifier array is used to receive a target radio frequency modulation signal and generate an initial radio frequency signal of corresponding amplitude; The initial digital power amplifier array includes the original digital power amplifier; the system includes: An additional digital power amplifier is used to expand the initial digital power amplifier array to obtain the target digital power amplifier array; A randomized rotation control module is used to select multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window at the end of each radio frequency cycle of the target radio frequency modulation signal, and randomly select a second digital power amplifier from the rotation window to update the amplitude control word; the updated second digital power amplifier receives the target radio frequency modulation signal and outputs a radio frequency signal with the corresponding amplitude according to the updated amplitude control word; the radio frequency signals of all digital power amplifiers in the target digital power amplifier array are combined to form the optimized target radio frequency signal.

2. The system according to claim 1, characterized in that, The number of existing digital power amplifiers is a first number, and the number of additional digital power amplifiers is a second number, which is less than the first number.

3. The system according to claim 1, characterized in that, The randomized rotation control module includes: A random number generator is used to generate random numbers. The modulo-remainder processing unit is used to take the random number modulo the number of the first digital power amplifiers in the rotation window, and determine the second digital power amplifier based on the remainder.

4. The system according to claim 1, characterized in that, The number of existing digital power amplifiers is the first quantity. The rotation window slides after a first number of RF cycles, and the slid rotation window contains a different first digital power amplifier than before the slide.

5. The system according to claim 4, characterized in that, The sliding is a sequential cyclic sliding: after a first number of RF cycles, the number of each first digital power amplifier in the rotation window increases by a fixed step size, and the total number of digital power amplifiers in the target digital power amplifier array is moduloed to obtain the slid-out rotation window.

6. The system according to claim 1, characterized in that, Each digital power amplifier in the target digital power amplifier array includes: multiple sub-power amplifiers, each of which receives the target radio frequency modulation signal as its input; the amplitude control word is used to control the number of sub-power amplifiers that are turned on, and the number of sub-power amplifiers that are turned on is proportional to the output amplitude.

7. The system according to claim 1, characterized in that, The system also includes: The radio frequency (RF) combining network and LC filtering network are used to combine the RF signals of all digital power amplifiers in the target digital power amplifier array through the RF combining network and output the optimized target RF signal through the LC filtering network.

8. A method for optimizing a digital power amplifier array, characterized in that, The method, applied to a system optimized for a digital power amplifier array according to any one of claims 1 to 7, comprises: The initial digital power amplifier array is expanded by adding an additional digital power amplifier to obtain the target digital power amplifier array; At the end of each RF cycle of the target RF modulation signal, the randomized rotation control module selects multiple first digital power amplifiers from the target digital power amplifier array to form a rotation window, and randomly selects a second digital power amplifier from the rotation window to update the amplitude control word. The updated second digital power amplifier receives the target RF modulation signal and outputs an RF signal with the corresponding amplitude according to the updated amplitude control word. The RF signals of all digital power amplifiers in the target digital power amplifier array are combined to form the optimized target RF signal.

9. An electronic device, characterized in that, include: The device includes a processor, a memory, and a bus. The memory stores machine instructions that the processor executes. When the electronic device is running, the processor communicates with the memory via the bus. When the machine instructions are executed by the processor, they perform the steps of the method for optimizing a digital power amplifier array as described in claim 8.

10. A computer storage medium, characterized in that, The computer storage medium stores a computer program that, when executed by a processor, performs the steps of the method for optimizing a digital power amplifier array as described in claim 8.

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