A gain control method, program product, electronic device, and storage medium for a base station receiving link

Abstract

The present application provides a gain control method, program product, electronic device and storage medium for a base station receiving link, which are applied to the field of communication technologies. The gain control method for the base station receiving link includes: for any terminal, calculating the predicted uplink power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, where the predicted uplink power represents the power of the next transmitted signal of the terminal arriving at the ADC input; for any uplink symbol, obtaining the scheduled terminal corresponding to the uplink symbol and determining the total power corresponding to the uplink symbol according to the predicted uplink power of the scheduled terminal; if service data is carried on a certain uplink symbol, calculating the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC; and determining the target gain of the receiving link according to the overflow gain and the calibration gain.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and in particular, to a method for gain control of a base station receiving link, a program product, an electronic device, and a storage medium. Background Art

[0002] In the current wireless communication network represented by the fifth-generation mobile communication technology (5G), the radio base station is responsible for demodulating the signals transmitted by the terminal. In this process, limited by device performance and product cost, the radio base station can usually only demodulate the received signals within a certain power range. If the received signal power is too small, it will be submerged in the receiver noise floor and cannot be demodulated. If the received signal power is too large, it will cause device saturation and signal distortion, and also cannot be demodulated.

[0003] In the current design process of base station products, the problem of the above-mentioned received signal power range is usually limited by the performance of the analog-to-digital converter (ADC). That is to say, when the received signals with a large power fluctuation range reach the ADC, the demodulation performance of the base station for the received signals is low. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a method for gain control of a base station receiving link, a program product, an electronic device, and a storage medium, so as to solve the technical problem that when the received signals with a large power fluctuation range reach the ADC in the prior art, the demodulation performance of the base station for the received signals is low.

[0005] In a first aspect, the embodiments of the present application provide a method for gain control of a base station receiving link, including: for any terminal, calculating the predicted uplink power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, where the uplink characteristic parameters include parameters related to the previous transmitted signal of the terminal, and the uplink control parameters include parameters for the base station to control the next transmitted signal of the terminal, and the predicted uplink power represents the power of the next transmitted signal of the terminal reaching the ADC input; for any uplink symbol, obtaining the scheduled terminal corresponding to the uplink symbol, and determining the total power corresponding to the uplink symbol according to the predicted uplink power corresponding to the scheduled terminal; if service data is carried on a certain uplink symbol, calculating the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC; determining the target gain of the receiving link according to the overflow gain and the calibration gain.

[0006] In the above solution, a dynamic gain control method is adopted to dynamically adjust the gain of the receiving link according to the received signal power. In this way, even if the power fluctuation range of the received signal when it reaches the ADC is large, it can ensure that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal. In addition, by combining the high-layer scheduling information of the base station and the physical layer measurement information, the service type and received power of the received signal are predicted in advance. The gain is not adjusted for the uplink symbols without services, and the calculation of the target gain is completed in advance for the uplink symbols with services, which not only avoids unnecessary gain adjustment but also speeds up the gain adjustment speed.

[0007] In an alternative embodiment, calculating the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average power ratio of the received signal, and the maximum input signal power supported by the ADC includes: determining the difference between the sum of the total power and the peak-to-average power ratio and the maximum input signal power as the overflow gain. In the above solution, the overflow gain of the receiving link can be determined according to the received signal power and the maximum input signal power supported by the ADC, so that the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0008] In an alternative embodiment, determining the target gain of the receiving link according to the overflow gain and the calibration gain includes: if the overflow gain is greater than the gain threshold, determining the target gain as the difference between the calibration gain and the overflow gain; otherwise, determining the target gain as the calibration gain. In the above solution, when the overflow gain is greater than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0009] In an alternative embodiment, before calculating the uplink predicted power of any terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, the method further includes: configuring the gain of the receiving link as the initial gain; determining the calibration gain according to the initial gain and the ADC input noise power; configuring the gain of the link as the calibration gain. In the above solution, the gain of the receiving link is first initialized according to the ADC performance, thereby ensuring that the ADC has a high quantization accuracy for low-power signals; then, considering that the noise floor levels in different working scenarios are different, the gain of the receiving link is calibrated according to the ADC input noise power, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signals in different working scenarios.

[0010] In an alternative embodiment, determining the calibration gain according to the initial gain and the ADC input noise power includes: calculating the calibration gain according to the following formula:

[0011] ;

[0012] where is the calibration gain, is the initial gain, is the receiver noise floor relative gain threshold, is the ADC input noise power, is the ADC fixed noise floor power. In the above solution, the initial gain can be determined according to the ADC performance, and the gain of the receiving link can be initialized based on the above initial gain, thereby ensuring that the ADC has a high quantization accuracy for small power signals.

[0013] In an alternative embodiment, before configuring the gain of the receiving link as the initial gain, the method further includes: calculating the initial gain according to the following formula:

[0014] ;

[0015] where is the operating bandwidth of the receiving link, is the fixed gain of the receiving link. In the above solution, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link can be calibrated based on the above calibration gain, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different operating scenarios.

[0016] In an alternative embodiment, after determining the target gain of the receiving link according to the overflow gain and the calibration gain, the method further includes: at the start time of receiving the uplink symbol, adjusting the gain of the receiving link to the target gain. In the above solution, the target gain is pre-calculated and the analog device is controlled to take effect at the start time of receiving the uplink symbol. Since the data at the start position of the uplink symbol generally does not participate in the signal demodulation process, the influence of signal distortion during the gain adjustment process on the demodulation performance can be avoided.

[0017] Second aspect, an embodiment of the present application provides a gain control device for a base station receiving link, including: a first calculation module, configured to calculate, for any terminal, the predicted uplink power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, where the uplink characteristic parameters include parameters related to the last transmitted signal of the terminal, the uplink control parameters include parameters for the base station to control the next transmitted signal of the terminal, and the predicted uplink power represents the power of the next transmitted signal of the terminal reaching the ADC input; an acquisition module, configured to, for any uplink symbol, acquire the scheduled terminal corresponding to the uplink symbol, and determine the total power corresponding to the uplink symbol according to the predicted uplink power corresponding to the scheduled terminal; a second calculation module, configured to, if service data is carried on a certain uplink symbol, calculate the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC; a first determination module, configured to determine the target gain of the receiving link according to the overflow gain and the calibration gain.

[0018] In the above solution, a dynamic gain control method is adopted to dynamically adjust the gain of the receiving link according to the received signal power. In this way, even if the power fluctuation range of the received signal when it reaches the ADC is large, it can be ensured that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal. In addition, by combining the high-layer scheduling information of the base station and the physical layer measurement information, the service type and received power of the received signal are predicted in advance. For uplink symbols without services, the gain is not adjusted, and for uplink symbols with services, the calculation of the target gain is completed in advance, which not only avoids unnecessary gain adjustment but also speeds up the gain adjustment speed.

[0019] In an optional implementation manner, the second calculation module is specifically configured to: determine the difference between the sum of the total power and the peak-to-average ratio and the maximum input signal power as the overflow gain. In the above solution, the overflow gain of the receiving link can be determined according to the received signal power and the maximum input signal power supported by the ADC, so that the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0020] In an alternative embodiment, the first determination module is specifically configured to: if the overflow gain is greater than the gain threshold, determine the target gain as the difference between the calibration gain and the overflow gain; otherwise, determine the target gain as the calibration gain. In the above solution, when the overflow gain is greater than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the above overflow gain to ensure that the received signal meets the requirements of the ADC for the input signal power when reaching the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0021] In an alternative embodiment, the gain control device of the base station receiving link further includes: a first configuration module, configured to configure the gain of the receiving link as an initial gain; a second determination module, configured to determine the calibration gain according to the initial gain and the ADC input noise power; a second configuration module, configured to configure the gain of the link as the calibration gain. In the above solution, the gain of the receiving link is first initialized according to the ADC performance, thereby ensuring that the ADC has a high quantization accuracy for low-power signals; then, considering that the background noise levels in different working scenarios are different, the gain of the receiving link is calibrated according to the ADC input noise power, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different working scenarios.

[0022] In an alternative embodiment, the second determination module is specifically configured to: calculate the calibration gain according to the following formula:

[0023] ;

[0024] where, is the calibration gain, is the initial gain, is the relative gain threshold of the receiver background noise, is the ADC input noise power, is the fixed background noise power of the ADC. In the above solution, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the above initial gain, thereby ensuring that the ADC has a high quantization accuracy for low-power signals.

[0025] In an alternative embodiment, the gain control device of the base station receiving link further includes: a third calculation module, configured to calculate the initial gain according to the following formula:

[0026] ;

[0027] where, is the working bandwidth of the receiving link, is the fixed gain of the receiving link. In the above solution, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link can be calibrated based on the above calibration gain, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different working scenarios.

[0028] In an alternative embodiment, the gain control device of the base station receiving link further includes: an adjustment module, configured to adjust the gain of the receiving link to the target gain at the start time of receiving the uplink symbol. In the above solution, the target gain is pre-calculated and controlled to take effect at the start time of receiving the uplink symbol by the analog device. Since the data at the start position of the uplink symbol generally does not participate in the signal demodulation process, the influence of signal distortion during the gain adjustment process on the demodulation performance can be avoided.

[0029] In a third aspect, an embodiment of the present application provides a computer program product, including computer program instructions, which, when read and run by a processor, execute the gain control method of the base station receiving link as described in the first aspect.

[0030] In a fourth aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory, and a bus; the processor and the memory communicate with each other through the bus; the memory stores computer program instructions executable by the processor, and the processor can execute the gain control method of the base station receiving link as described in the first aspect by invoking the computer program instructions.

[0031] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer program instructions, and when the computer program instructions are run by a computer, the computer is enabled to execute the gain control method of the base station receiving link as described in the first aspect.

[0032] To make the above objects, features, and advantages of the present application more obvious and understandable, specific embodiments of the present application are hereinafter exemplified and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 is a flowchart of a gain control method for a base station receiving link provided by an embodiment of the present application;

[0035] Figure 2 This is a structural block diagram of a gain control device for a base station receiving link provided by an embodiment of the present application;

[0036] Figure 3 This is a structural block diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0037] Limited by device performance and product cost, a wireless base station can usually only demodulate received signals within a certain power range. If the received signal power is too small, it will be submerged in the receiver's noise floor and cannot be demodulated. If the received signal power is too large, it will cause device saturation and signal distortion, making it impossible to demodulate. To address the above problems, the prior art generally uses two methods: fixed gain control or dynamic gain control to adjust the gain of the base station receiving link.

[0038] Fixed gain control configures the gain of the base station receiving link as a fixed value according to the device performance of the product and the requirements of the application scenario. The fixed gain control method has the following problems: 1. It has high requirements for the performance of ADC devices (requiring the ADC to support a large input power range); 2. It is not applicable to scenarios where the received signal power of the base station fluctuates greatly; 3. If the application scenario does not match the gain configuration, it will lead to performance loss.

[0039] Dynamic gain control adaptively adjusts the receiving link gain according to the received signal power; the specific method is to continuously detect the power of the ADC output signal by the base station. If it exceeds a certain threshold (too large or too small), the receiving link gain is adjusted to make the ADC input signal within a reasonable range. The dynamic gain control method has the following problems: 1. Since the gain adjustment of the receiving link is implemented through analog devices, both the detection of the ADC output signal power and the gain adjustment will introduce time delays. Therefore, if the signal power changes rapidly, the dynamic gain adjustment speed may not be able to keep up with the signal power change speed, resulting in poor performance when the signal power changes frequently; 2. Since the gain adjustment of analog devices will cause signal distortion for a period of time, each gain adjustment will cause a certain period of signal quality degradation, resulting in a significant decline in the base station demodulation performance.

[0040] Based on the problems existing in the above fixed gain control and dynamic gain control, an embodiment of the present application provides a gain control method for a base station receiving link. This method is applied to a base station, and the base station dynamically adjusts the gain of the receiving link according to the received signal power, thereby improving the demodulation performance of the base station for received signals. Among them, the above base station receiving link refers to the link between the signal output point of the antenna module and the signal input point of the ADC. Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application.

[0041] Please refer to Figure 1, Figure 1 It is a flowchart of a gain control method for a base station receiving link provided by an embodiment of this application. The gain control method for the base station receiving link may specifically include the following steps:

[0042] Step S101: For any terminal, calculate the predicted uplink power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal.

[0043] Step S102: For any uplink symbol, obtain the scheduled terminal corresponding to the uplink symbol, and determine the total power corresponding to the uplink symbol according to the predicted uplink power corresponding to the scheduled terminal.

[0044] Step S103: If a certain uplink symbol carries service data, calculate the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC.

[0045] Step S104: Determine the target gain of the receiving link according to the overflow gain and the calibration gain.

[0046] Specifically, in the above step S101, the uplink characteristic parameters include parameters related to the terminal's previous transmitted signal. It should be noted that the embodiments of this application do not specifically limit the specific implementation manners of the above uplink characteristic parameters. For example, the uplink characteristic parameters may include the power when the previous transmitted signal reaches the ADC entrance and the signal bandwidth of the previous uplink data channel signal.

[0047] As an implementation manner, the power headroom reported by the user corresponds to a specific physical channel. For example, the 5G communication protocol stipulates that the terminal reports the power reservation (unit: dB) corresponding to a certain uplink data channel signal of the user , then the base station can determine the signal bandwidth , and count the power when the transmitted signal reaches the ADC entrance (unit: dBm) and the signal-to-noise ratio .

[0048] The uplink control parameters include the parameters for the base station to control the terminal's next transmitted signal. It should be noted that the embodiments of this application do not specifically limit the specific implementation manners of the above uplink control parameters. For example, the uplink control parameters include the power adjustment signaling sent by the base station to the terminal and the bandwidth of the next transmitted signal.

[0049] As an implementation manner, the base station first calculates the maximum power of the terminal's transmitted signal when it reaches the ADC input according to the following formula (unit: dBm):

[0050] ;

[0051] Then, according to the next signal service type of the terminal, the channel bandwidth, and the base station demodulation capability, a power adjustment signaling sent to the terminal is determined (unit: dB, which is used to increase or decrease the transmit signal power spectral density and ensure that it does not exceed the maximum transmit power of the terminal), so that the next transmitted signal of the terminal can have a certain signal quality level when it reaches the base station

[0052] The uplink predicted power characterizes the power of the terminal's next transmitted signal when it reaches the ADC input

[0053] It can be understood that the base station can receive the transmitted signals sent by multiple terminals. For any one of the above multiple terminals, the uplink predicted power of the terminal can be calculated according to the uplink characteristic parameters and uplink control parameters of the terminal

[0054] It should be noted that the embodiments of the present application do not specifically limit the specific implementation manner of calculating the above uplink predicted power, and those skilled in the art can make appropriate adjustments according to the actual situation. For example, the above uplink predicted power can be calculated according to the following formula :

[0055] ;

[0056] Among them, is the terminal the bandwidth of the next transmitted signal

[0057] In the above step S102, the specific meaning of the uplink symbol in the embodiments of the present application may be different according to different protocol specifications, and the embodiments of the present application do not specifically limit this. For example, in a 5G system, both the base station and the terminal use Orthogonal Frequency Division Multiplexing (OFDM) technology to transmit signals. At this time, the uplink symbol may refer to 1 OFDM symbol transmitted by the terminal to the base station

[0058] The scheduled terminal refers to the set of terminals that can perform data transmission on a specific uplink symbol. It can be understood that the uplink transmission resources are divided into multiple uplink symbols in the time domain. For any one of the above multiple uplink symbols , the uplink symbol can be obtained The set of corresponding scheduled terminals As an implementation, the above-mentioned set of scheduled terminals can be obtained according to the system scheduling information .

[0059] Furthermore, the base station can determine the total power corresponding to the uplink symbol according to the predicted power of the uplink corresponding to the scheduled terminal. As an implementation, the above-mentioned total power can be determined according to the following formula :[[]]END]]

[0060] .

[0061] After the above step S102, the base station can determine whether there is service data carried on the uplink symbol . If there is no service data carried on the uplink symbol , the gain of the receiving link may not be adjusted; if there is service data carried on the uplink symbol , the gain of the receiving link can be adjusted. In the embodiments of the present application, the target gain of the receiving link can be determined by performing subsequent step S103 and step S104

[0062] In the above step S103, the peak-to-average ratio of the received signal refers to the ratio of the peak power to the average power of the received signal. As an implementation, the peak-to-average ratio (unit: dB) of the received signal can have a value range of .

[0063] The maximum input signal power supported by different models of ADCs is different. Therefore, the maximum input signal power supported by the ADC can be obtained by querying the device manual or testing (unit: dbm).

[0064] According to the total power determined in the above step S102 , and the above-mentioned peak-to-average ratio of the received signal , the maximum input signal power supported by the ADC, calculate the overflow gain corresponding to the receiving link of the base station. Furthermore, in the above step S104, the target gain of the receiving link can be determined according to the above-mentioned overflow gain and the calibration gain

[0065] Among them, the calibration gain is a gain determined before the terminal accesses the cell and used to calibrate the gain of the receiving link. It can be understood that the calibration gains in different working scenarios can be the same or different. As an implementation, the above-mentioned calibration gain can be determined according to the performance of the ADC

[0066] It should be noted that the gain of the receiving link may include the gain of a digital step attenuator (DSA) and other gains other than the DSA; among them, the gain of the DSA is an adjustable gain, and the other gains other than the DSA are fixed gains. Therefore, the calibration gain and the target gain involved in the embodiments of the present application may refer to either the gain of the DSA or the overall gain of the receiving link (i.e., the gain of the DSA plus the fixed gain), and the embodiments of the present application do not make specific limitations in this regard.

[0067] In the above solution, a dynamic gain control method is adopted to dynamically adjust the gain of the receiving link according to the received signal power. In this way, even if the power fluctuation range of the received signal when it reaches the ADC is large, it can be ensured that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal. In addition, by combining the high-layer scheduling information of the base station and the physical layer measurement information to predict in advance the service type and received power of the received signal, the gain is not adjusted for the uplink symbols without services, and the calculation of the target gain is completed in advance for the uplink symbols with services, which not only avoids unnecessary gain adjustments but also speeds up the gain adjustment speed.

[0068] Further, on the basis of the above embodiments, an implementation manner of determining the overflow gain is introduced below. In this implementation manner, step S103 above may specifically include the following steps:

[0069] The sum of the total power corresponding to the uplink symbol and the peak-to-average power ratio of the received signal, and the difference between the maximum input signal power supported by the ADC is determined as the overflow gain corresponding to the receiving link of the base station.

[0070] Specifically, the above overflow gain can be determined according to the following formula :

[0071] .

[0072] In the above solution, the overflow gain of the receiving link can be determined according to the received signal power and the maximum input signal power supported by the ADC, so that the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0073] Further, on the basis of the above embodiments, an implementation manner of determining the target gain is introduced below. In this implementation manner, step S104 above may specifically include the following steps:

[0074] If the overflow gain corresponding to the receiving link of the base station is greater than the gain threshold, the target gain corresponding to the receiving link of the base station is determined as the difference between the calibration gain and the overflow gain; otherwise, the target gain corresponding to the receiving link of the base station is determined as the calibration gain.

[0075] Specifically, the embodiments of the present application do not specifically limit the specific implementation manner of the above gain threshold, and those skilled in the art can make appropriate adjustments according to the actual situation. For example, the gain threshold can be 0 dB, 0.1 dB, or -0.1 dB, etc.

[0076] Taking the calibration gain and the target gain of the DSA as an example, the above target gain can be determined according to the following formula :

[0077] .

[0078] In the above solution, when the overflow gain is greater than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when reaching the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0079] Further, on the basis of the above embodiments, before the above step S101, the gain control method for the base station receiving link provided by the embodiments of the present application may further include the following steps:

[0080] Step 1), configure the gain of the receiving link as the initial gain.

[0081] Step 2), determine the calibration gain according to the initial gain and the ADC input noise power.

[0082] Step 3), configure the gain of the link as the calibration gain.

[0083] Specifically, in the above step 1), the initial gain is an initial gain determined before the terminal accesses the cell, which is used to ensure that the ADC has a high quantization accuracy for low-power signals. As an implementation manner, the above initial gain can be determined according to the performance of the ADC. It should be noted that the initial gain involved in the embodiments of the present application can refer to either the gain of the DSA or the overall gain of the receiving link (i.e., the gain of the DSA plus the fixed gain), and the embodiments of the present application do not specifically limit this.

[0084] In the above step 2), since there is no service data at this time, the input signal of the ADC is the system floor noise of the receiving link. Therefore, by calculating the input power of the ADC, the ADC input noise power can be obtained, and then the calibration gain can be determined according to the initial gain and the ADC input noise power.

[0085] It can be understood that the above steps 1)-3) can be executed before the terminal initially accesses. That is to say, before the base station starts to establish a cell, the gain of the base station receiving link can be first configured as the initial gain, then the input power of the ADC is calculated to obtain the ADC input noise power, and finally the gain of the base station receiving link is adjusted to the calibration gain.

[0086] In the above solution, the gain of the receiving link is first initialized according to the ADC performance, thereby ensuring that the ADC has a high quantization accuracy for low-power signals; then considering that the noise floor levels in different working scenarios are different, the gain of the receiving link is calibrated according to the ADC input noise power, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different working scenarios.

[0087] Further, on the basis of the above embodiment, taking the calibration gain and the initial gain of the DSA as an example, the calibration gain can be calculated according to the following formula:

[0088] ;

[0089] where is the relative gain threshold of the receiver noise floor, is the ADC input noise power, is the ADC fixed noise floor power.

[0090] Specifically, the above relative gain threshold of the receiver noise floor represents the gain of the natural noise floor relative to the ADC noise floor, which affects the sensitivity of the receiver. As an implementation manner, the value range of the relative gain threshold of the receiver noise floor can be .

[0091] The ADC fixed noise floor power can be obtained through the device manual or testing. Specifically, it can be described that when the ADC works, it will generate a certain power of noise floor at the output end, and this noise floor is equivalent to the output generated after the noise with a power of is input to the ADC.

[0092] The part of in the above formula represents the difference between the initial gain and the calibration gain. That is, if the initial gain is the same as the calibration gain, then this part is equal to 0.

[0093] In the above solution, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the above initial gain, thereby ensuring that the ADC has a high quantization accuracy for low-power signals.

[0094] Further, based on the above embodiments, the calibration gain and the initial gain Taking the gain of DSA as an example, the initial gain can be calculated according to the following formula:

[0095] ;

[0096] Wherein, is the working bandwidth of the receiving link, is the fixed gain of the receiving link.

[0097] Specifically, in the above formula, this part represents the theoretical power of the natural background noise. The above formula represents the relative gain threshold of the power of the natural background noise to the background noise power of ADC quantization and the receiver background noise.

[0098] In the above solution, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link can be calibrated based on the above calibration gain, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different working scenarios.

[0099] Further, based on the above embodiments, after the above step S104, the gain control method of the base station receiving link provided by the embodiments of the present application may further include the following steps:

[0100] At the starting moment of receiving the uplink symbol, adjust the gain of the receiving link to the target gain.

[0101] Specifically, taking the 5G communication system as an example, since the starting position of receiving the OFDM symbol in the 5G communication system is the start of the symbol cyclic prefix (CP), and the CP data does not participate in the signal demodulation process, therefore, the target gain value is pre-calculated and the analog device is controlled to take effect at the starting receiving moment of the uplink symbol (that is, the position where each uplink symbol CP starts), which avoids the influence of signal distortion during the gain adjustment process on the demodulation performance.

[0102] In the above solution, the target gain is pre-calculated and the analog device is controlled to take effect at the starting receiving moment of the uplink symbol. Since the data at the starting position of the uplink symbol generally does not participate in the signal demodulation process, the influence of signal distortion during the gain adjustment process on the demodulation performance can be avoided.

[0103] Please refer to Figure 2 , Figure 2The following is a structural block diagram of a gain control device for a base station receiving link provided by an embodiment of the present application. The gain control device 200 for the base station receiving link includes: a first calculation module 201, configured to calculate, for any terminal, the predicted uplink power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, where the uplink characteristic parameters include parameters related to the previous transmission signal of the terminal, the uplink control parameters include parameters for the base station to control the next transmission signal of the terminal, and the predicted uplink power represents the power of the next transmission signal of the terminal reaching the ADC input; an acquisition module 202, configured to, for any uplink symbol, acquire the scheduled terminal corresponding to the uplink symbol, and determine the total power corresponding to the uplink symbol according to the predicted uplink power corresponding to the scheduled terminal; a second calculation module 203, configured to, if service data is carried on a certain uplink symbol, calculate the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC; a first determination module 204, configured to determine the target gain of the receiving link according to the overflow gain and the calibration gain.

[0104] In the above solution, a dynamic gain control method is adopted to dynamically adjust the gain of the receiving link according to the received signal power. In this way, even if the power fluctuation range of the received signal when it reaches the ADC is large, it can be ensured that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal. In addition, by combining the high-layer scheduling information of the base station and the physical-layer measurement information, the service type and received power of the received signal are predicted in advance. For uplink symbols without services, the gain is not adjusted, and for uplink symbols with services, the calculation of the target gain is completed in advance, which not only avoids unnecessary gain adjustment but also speeds up the gain adjustment speed.

[0105] Further, on the basis of the above embodiment, the second calculation module 203 is specifically configured to: determine the difference between the sum of the total power and the peak-to-average ratio and the maximum input signal power as the overflow gain.

[0106] In the above solution, the overflow gain of the receiving link can be determined according to the received signal power and the maximum input signal power supported by the ADC, so that the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0107] Further, based on the above embodiments, the first determination module 204 is specifically configured to: if the overflow gain is greater than the gain threshold, determine the target gain as the difference between the calibration gain and the overflow gain; otherwise, determine the target gain as the calibration gain.

[0108] In the above solution, when the overflow gain is greater than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the above overflow gain, ensuring that the received signal meets the requirements of the ADC for the input signal power when it reaches the ADC input, thereby improving the demodulation performance of the base station for the received signal.

[0109] Further, based on the above embodiments, the gain control device 200 of the base station receiving link further includes: a first configuration module, configured to configure the gain of the receiving link as an initial gain; a second determination module, configured to determine the calibration gain according to the initial gain and the ADC input noise power; a second configuration module, configured to configure the gain of the link as the calibration gain.

[0110] In the above solution, first, the gain of the receiving link is initialized according to the ADC performance, thereby ensuring that the ADC has a high quantization accuracy for low-power signals; then, considering that the noise floor levels in different working scenarios are different, the gain of the receiving link is calibrated according to the ADC input noise power, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different working scenarios.

[0111] Further, based on the above embodiments, the second determination module is specifically configured to: calculate the calibration gain according to the following formula:

[0112] ;

[0113] where, is the calibration gain, is the initial gain, is the receiver noise floor relative gain threshold, is the ADC input noise power, is the ADC fixed noise floor power.

[0114] In the above solution, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the above initial gain, thereby ensuring that the ADC has a high quantization accuracy for low-power signals.

[0115] Further, based on the above embodiments, the gain control device 200 of the base station receiving link further includes: a third calculation module, configured to calculate the initial gain according to the following formula:

[0116] ;

[0117] Wherein, is the operating bandwidth of the receiving link, is the fixed gain of the receiving link.

[0118] In the above solution, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link can be calibrated based on the above calibration gain, so that the receiver can ensure a high ADC quantization accuracy for the terminal access signal in different operating scenarios.

[0119] Further, on the basis of the above embodiment, the gain control device 200 of the base station receiving link further includes: an adjustment module, configured to adjust the gain of the receiving link to the target gain at the start time of receiving the uplink symbol.

[0120] In the above solution, the target gain is calculated in advance and the analog device is controlled to take effect at the start time of receiving the uplink symbol. Since the data at the start position of the uplink symbol generally does not participate in the signal demodulation process, the influence of signal distortion during the gain adjustment process on the demodulation performance can be avoided.

[0121] Please refer to Figure 3 , Figure 3 which is a structural block diagram of an electronic device provided by an embodiment of the present application. The electronic device 300 includes: at least one processor 301, at least one communication interface 302, at least one memory 303, and at least one communication bus 304. Wherein, the communication bus 304 is used to realize the direct connection communication between these components, the communication interface 302 is used to communicate signaling or data with other node devices, and the memory 303 stores machine-readable instructions executable by the processor 301. When the electronic device 300 runs, the processor 301 communicates with the memory 303 through the communication bus 304, and when the machine-readable instructions are called by the processor 301, the above-mentioned gain control method of the base station receiving link is executed.

[0122] For example, the processor 301 in the embodiment of the present application can read a computer program from the memory 303 through the communication bus 304 and execute the computer program to implement the following method: for any terminal, calculate the uplink prediction power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, where the uplink characteristic parameters include parameters related to the previous transmission signal of the terminal, the uplink control parameters include parameters for the base station to control the next transmission signal of the terminal, and the uplink prediction power represents the power of the next transmission signal of the terminal reaching the ADC input; for any uplink symbol, obtain the scheduled terminal corresponding to the uplink symbol, and determine the total power corresponding to the uplink symbol according to the uplink prediction power corresponding to the scheduled terminal; if service data is carried on a certain uplink symbol, calculate the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC; determine the target gain of the receiving link according to the overflow gain and the calibration gain.

[0123] Among them, the processor 301 includes one or more, which can be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 301 can be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a microcontroller unit (Micro Controller Unit, abbreviated as MCU), a network processor (Network Processor, abbreviated as NP), or other conventional processors; it can also be a dedicated processor, including a neural-network processing unit (Neural-network Processing Unit, abbreviated as NPU), a graphics processing unit (Graphics Processing Unit, abbreviated as GPU), a digital signal processor (Digital Signal Processor, abbreviated as DSP), an application specific integrated circuit (Application Specific Integrated Circuits, abbreviated as ASIC), a field programmable gate array (Field Programmable Gate Array, abbreviated as FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. And when there are multiple processor 301s, a part of them can be general-purpose processors, and another part can be dedicated processors.

[0124] The memory 303 includes one or more, which may be, but are not limited to, random access memory (RAM), read only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0125] It can be understood that Figure 3 The structure shown is only schematic, and the electronic device 300 may further include more or fewer components than those shown in Figure 3 or have a different configuration from that shown in Figure 3 shown. Figure 3 Each component shown in can be implemented by hardware, software, or a combination thereof. In the embodiments of the present application, the electronic device 300 may be, but is not limited to, physical devices such as desktop computers, laptop computers, smart phones, smart wearable devices, vehicle-mounted devices, etc., and may also be virtual devices such as virtual machines. In addition, the electronic device 300 is not necessarily a single device, and may also be a combination of multiple devices, such as a server cluster, etc.

[0126] The embodiments of the present application further provide a computer program product, including a computer program stored on a computer-readable storage medium. The computer program includes computer program instructions. When the computer program instructions are executed by a computer, the computer can execute the steps of the gain control method of the base station receiving link in the above embodiments, for example, including: Step S101: For any terminal, calculate the uplink predicted power of the terminal according to the uplink characteristic parameters and uplink control parameters of the terminal. Step S102: For any uplink symbol, obtain the scheduled terminal corresponding to the uplink symbol, and determine the total power corresponding to the uplink symbol according to the uplink predicted power corresponding to the scheduled terminal. Step S103: If service data is carried on a certain uplink symbol, calculate the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC. Step S104: Determine the target gain of the receiving link according to the overflow gain and the calibration gain.

[0127] The embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores computer program instructions. When the computer program instructions are run by a computer, the computer is enabled to execute the gain control method for the base station receiving link described in the foregoing method embodiment.

[0128] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in an electrical, mechanical or other form.

[0129] In addition, the units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0130] Furthermore, in each embodiment of the present application, the various functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0131] It should be noted that if the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0132] In this document, relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0133] The above description is only for the embodiments of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A gain control method for a base station receiving link, characterized in that: include: For any terminal, the uplink predicted power of the terminal is calculated according to the uplink characteristic parameters and uplink control parameters of the terminal, wherein the uplink characteristic parameters include parameters related to the last transmitted signal of the terminal, the uplink control parameters include parameters for the base station to control the next transmitted signal of the terminal, and the uplink predicted power represents the power of the next transmitted signal of the terminal reaching the ADC entrance; For any uplink symbol, obtain a scheduled terminal corresponding to the uplink symbol, and determine a total power corresponding to the uplink symbol according to the uplink predicted power corresponding to the scheduled terminal; If a certain uplink symbol carries service data, the overflow gain corresponding to the receiving link of the base station is calculated according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC; Determine a target gain of the receiving link according to the overflow gain and the calibration gain; The determining the target gain of the receiving link according to the overflow gain and the calibration gain comprises: If the overflow gain is greater than the gain threshold, the target gain is determined as the difference between the calibration gain and the overflow gain; otherwise, the target gain is determined as the calibration gain; Before calculating the uplink predicted power of any terminal according to the uplink characteristic parameters and uplink control parameters of the terminal, the method further includes: Configuring the gain of the receiving link to be an initial gain, wherein the initial gain is determined based on a theoretical power of a natural noise floor, an ADC fixed noise floor power, a fixed gain of the receiving link, and a receiver noise floor relative gain threshold; Determining the calibration gain according to the initial gain and the ADC input noise power, wherein the difference between the calibration gain and the initial gain is the difference between the initial gain and the calibration gain, and the difference is determined based on the receiver noise floor relative gain threshold, the ADC input noise power, and the ADC fixed noise floor power; The gain of the link is configured to be the calibration gain.

2. The gain control method of the base station receiving link according to claim 1, characterized in that: The calculating the overflow gain corresponding to the receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of the received signal, and the maximum input signal power supported by the ADC includes: The difference between the sum of the total power and the peak-to-average ratio and the maximum input signal power is determined as the overflow gain.

3. The gain control method of a base station receiving link according to claim 1, characterized in that: The determining the calibration gain according to the initial gain and the ADC input noise power comprises: The calibration gain is calculated according to the following formula: ； in, is the calibration gain, is the initial gain, is the receiver noise floor relative gain threshold, is the ADC input noise power, The noise floor power is fixed for the ADC.

4. The gain control method of the base station receiving link according to claim 3, characterized in that: Before configuring the gain of the receiving link to be the initial gain, the method further includes: The initial gain is calculated according to the following formula: ； in, is the working bandwidth of the receiving link, is the fixed gain of the receiving link.

5. The gain control method of a base station receiving link according to any one of claims 1 to 4, characterized in that: After determining the target gain of the receiving link according to the overflow gain and the calibration gain, the method further includes: At the start time of receiving the uplink symbol, the gain of the receiving link is adjusted to the target gain.

6. A computer program product, characterized in that The method comprises computer program instructions, and when the computer program instructions are read and executed by a processor, the method for controlling the gain of a base station receiving link as claimed in any one of claims 1 to 5 is executed.

7. An electronic device, characterized in that: include: processor, memory, and bus; The processor and the memory communicate with each other via the bus; The memory stores computer program instructions that can be executed by the processor, and the processor calls the computer program instructions to execute the gain control method for the base station receiving link as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a computer, the computer executes the gain control method for a base station receiving link according to any one of claims 1 to 5.

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