CN119997184B - Gain control method, program product, electronic equipment and storage medium of base station receiving link - Google Patents
Gain control method, program product, electronic equipment and storage medium of base station receiving link Download PDFInfo
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Abstract
The application provides a gain control method, a program product, electronic equipment and a storage medium of a base station receiving link, which are applied to the technical field of communication, wherein the gain control method of the base station receiving link comprises the steps of calculating uplink predicted power of any terminal according to uplink characteristic parameters and uplink control parameters of the terminal, wherein the uplink predicted power represents power of a next transmitting signal of the terminal to an ADC (analog to digital converter) inlet, obtaining a scheduled terminal corresponding to the uplink symbol according to any uplink symbol, determining total power corresponding to the uplink symbol according to the uplink predicted power corresponding to the scheduled terminal, calculating overflow gain corresponding to the receiving link of the base station according to total power corresponding to the uplink symbol, peak-to-average ratio of the receiving signal and maximum input signal power supported by the ADC if business data is carried on a certain uplink symbol, and determining target gain of the receiving link according to the overflow gain and the calibration gain.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a gain control method, a program product, an electronic device, and a storage medium for a base station receiving link.
Background
In the current wireless communication network represented by the fifth generation mobile communication technology (Fifth Generation Mobile Network, 5G), the wireless base station is responsible for completing the function of demodulating the signal transmitted by the terminal. In this process, due to device performance and product cost, the wireless base station generally only can demodulate a received signal within a certain power range, if the received signal power is too small, the received signal power is submerged in the noise floor of the receiver and cannot be demodulated, and if the received signal power is too large, the device is saturated and causes signal distortion and cannot be demodulated.
In the current design process of base station products, the above problem of the power range of the received signal is generally limited by the performance constraint of an Analog-to-Digital Converter (ADC), that is, the demodulation performance of the received signal by the base station is lower when the received signal with a larger power fluctuation range reaches the ADC.
Disclosure of Invention
An embodiment of the application aims to provide a gain control method, a program product, electronic equipment and a storage medium of a base station receiving link, which are used for solving the technical problem that when a receiving signal with a larger power fluctuation range reaches an ADC in the prior art, the demodulation performance of the base station on the receiving signal is lower.
In a first aspect, an embodiment of the present application provides a method for controlling gain of a base station receiving link, including calculating, for any terminal, uplink predicted power of the terminal according to uplink characteristic parameters of the terminal and uplink control parameters, where the uplink characteristic parameters include parameters related to a last transmission signal of the terminal, the uplink control parameters include parameters of a base station controlling a next transmission signal of the terminal, the uplink predicted power characterizes power of the next transmission signal of the terminal reaching an ADC inlet, for any uplink symbol, obtaining a scheduled terminal corresponding to the uplink symbol, determining 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, calculating, according to the total power corresponding to the uplink symbol, a peak-to-average ratio of a received signal, and a maximum input signal power supported by the ADC, an overflow gain corresponding to the receiving link of the base station, and determining, according to the overflow gain and a calibration gain, a target gain of the received link.
In the scheme, a dynamic gain control method is adopted to dynamically adjust the gain of a receiving link according to the power of a receiving signal, so that even if the power fluctuation range of the receiving signal reaches an ADC is large, the requirement of the ADC on the power of an input signal can be met when the receiving signal reaches an ADC inlet, and the demodulation performance of the base station for the receiving signal can be improved. In addition, the service type and the received power of the received signal are prejudged in advance by combining the high-layer scheduling information and the physical layer measurement information of the base station, the gain is not adjusted for the uplink symbol without service, and the calculation of the target gain is completed in advance for the uplink symbol with service, so that unnecessary gain adjustment is avoided, and the gain adjustment speed is increased.
In an alternative embodiment, 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 determining 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 scheme, 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 overflow gain, the requirement of the ADC on the input signal power is met when the received signal reaches an ADC inlet, and the demodulation performance of the base station for the received signal is improved.
In an alternative embodiment, the determining the target gain of the receiving link according to the overflow gain and the calibration gain includes determining the target gain as a difference between the calibration gain and the overflow gain if the overflow gain is greater than a gain threshold value, and otherwise determining the target gain as the calibration gain. In the scheme, when the overflow gain is larger than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the overflow gain, so that the requirement of the ADC on the input signal power is met when the receiving signal reaches the ADC inlet, and the demodulation performance of the base station for the receiving signal is improved.
In an alternative embodiment, before the uplink predicted power of any terminal is calculated according to the uplink characteristic parameter and the uplink control parameter of the terminal, the method further comprises configuring the gain of the receiving link as an initial gain, determining the calibration gain according to the initial gain and the ADC input noise power, and configuring the gain of the link as the calibration gain. In the scheme, the gain of the receiving link is initialized according to the ADC performance, so that the ADC is guaranteed to have higher quantization precision on the low-power signal, and then the gain of the receiving link is calibrated according to the ADC input noise power in consideration of different background noise levels of different working scenes, so that the receiver can be guaranteed to have higher ADC quantization precision on the terminal access signal in different working scenes.
In an alternative embodiment, the determining the calibration gain based on the initial gain and ADC input noise power includes calculating the calibration gain according to the following formula:
;
Wherein, For the purpose of the said calibration gain,For the initial gain to be the same as the initial gain,For the receiver background noise relative gain threshold,A noise power is input for the ADC,The background noise power is fixed for the ADC. In the scheme, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the initial gain, so that the ADC is ensured to have higher quantization precision on the low-power signal.
In an alternative embodiment, before said configuring the gain of the receiving link to be an initial gain, the method further comprises calculating the initial gain according to the formula:
;
Wherein, For the operating bandwidth of the receiving link,Is a fixed gain for the receive chain. In the scheme, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link is calibrated based on the calibration gain, so that the receiver can ensure higher ADC quantization precision on terminal access signals in different working scenes.
In an alternative embodiment, after the determining the target gain of the receiving link according to the overflow gain and the calibration gain, the method further includes adjusting the gain of the receiving link to the target gain at the starting time of the uplink symbol reception. In the above scheme, the target gain is calculated in advance and the analog device is controlled to take effect at the initial receiving time of the uplink symbol, and since the data of the initial position of the uplink symbol does not generally participate in the signal demodulation process, the influence of the signal distortion in the gain adjustment process on the demodulation performance can be avoided.
In a 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, uplink predicted power of the terminal according to uplink characteristic parameters of the terminal and uplink control parameters, where the uplink characteristic parameters include parameters related to a last transmission signal of the terminal, the uplink control parameters include parameters of a base station controlling a next transmission signal of the terminal, the uplink predicted power characterizes power of the next transmission signal of the terminal reaching an ADC inlet, an acquisition module, configured to acquire, for any uplink symbol, a scheduled terminal corresponding to the uplink symbol, and determine, according to the uplink predicted power of the scheduled terminal, total power corresponding to the uplink symbol, and if service data is carried on a certain uplink symbol, calculate, according to the total power corresponding to the uplink symbol, a peak-to-average ratio of a received signal, and a maximum input signal power supported by an ADC, an overflow gain corresponding to the receiving link of the base station, and determine, according to the first determination module, and determine, according to the overflow gain, the gain and the calibration target gain.
In the scheme, a dynamic gain control method is adopted to dynamically adjust the gain of a receiving link according to the power of a receiving signal, so that even if the power fluctuation range of the receiving signal reaches an ADC is large, the requirement of the ADC on the power of an input signal can be met when the receiving signal reaches an ADC inlet, and the demodulation performance of the base station for the receiving signal can be improved. In addition, the service type and the received power of the received signal are prejudged in advance by combining the high-layer scheduling information and the physical layer measurement information of the base station, the gain is not adjusted for the uplink symbol without service, and the calculation of the target gain is completed in advance for the uplink symbol with service, so that unnecessary gain adjustment is avoided, and the gain adjustment speed is increased.
In an alternative embodiment, 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 scheme, 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 overflow gain, the requirement of the ADC on the input signal power is met when the received signal reaches an ADC inlet, and the demodulation performance of the base station for the received signal is improved.
In an alternative embodiment, the first determining module is specifically configured to determine the target gain as a difference between the calibration gain and the overflow gain if the overflow gain is greater than a gain threshold, and determine the target gain as the calibration gain if the overflow gain is not greater than the gain threshold. In the scheme, when the overflow gain is larger than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the overflow gain, so that the requirement of the ADC on the input signal power is met when the receiving signal reaches the ADC inlet, and the demodulation performance of the base station for the receiving signal is improved.
In an alternative implementation mode, the gain control device of the base station receiving link further comprises a first configuration module, a second determination module and a second configuration module, wherein the first configuration module is used for configuring the gain of the receiving link to be an initial gain, the second determination module is used for determining the calibration gain according to the initial gain and the ADC input noise power, and the second configuration module is used for configuring the gain of the link to be the calibration gain. In the scheme, the gain of the receiving link is initialized according to the ADC performance, so that the ADC is guaranteed to have higher quantization precision on the low-power signal, and then the gain of the receiving link is calibrated according to the ADC input noise power in consideration of different background noise levels of different working scenes, so that the receiver can be guaranteed to have higher ADC quantization precision on the terminal access signal in different working scenes.
In an alternative embodiment, the second determining module is specifically configured to calculate the calibration gain according to the following formula:
;
Wherein, For the purpose of the said calibration gain,For the initial gain to be the same as the initial gain,For the receiver background noise relative gain threshold,A noise power is input for the ADC,The background noise power is fixed for the ADC. In the scheme, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the initial gain, so that the ADC is ensured to have higher quantization precision on the low-power signal.
In an alternative embodiment, the gain control device of the base station receiving link further comprises a third calculation module, configured to calculate the initial gain according to the following formula:
;
Wherein, For the operating bandwidth of the receiving link,Is a fixed gain for the receive chain. In the scheme, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link is calibrated based on the calibration gain, so that the receiver can ensure higher ADC quantization precision on terminal access signals in different working scenes.
In an alternative implementation manner, the gain control device of the base station receiving link further comprises an adjusting module, configured to adjust the gain of the receiving link to the target gain at the starting moment of receiving the uplink symbol. In the above scheme, the target gain is calculated in advance and the analog device is controlled to take effect at the initial receiving time of the uplink symbol, and since the data of the initial position of the uplink symbol does not generally participate in the signal demodulation process, the influence of the signal distortion in the gain adjustment process on the demodulation performance can be avoided.
In a third aspect, embodiments of the present application provide a computer program product comprising computer program instructions which, when read and executed by a processor, perform the method of gain control of a base station receive chain as described in the first aspect.
In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and a bus, where the processor and the memory complete communication with each other through the bus, and the memory stores computer program instructions executable by the processor, where the processor invokes the computer program instructions to perform a gain control method of a base station receiving link according to the first aspect.
In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer program instructions that, when executed by a computer, cause the computer to perform the method for controlling gain of a base station receiving link according to the first aspect.
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a gain control method of a base station receiving link according to an embodiment of the present application;
fig. 2 is a block diagram of a gain control device of a base station receiving link according to an embodiment of the present application;
Fig. 3 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Due to the device performance and the product cost, the wireless base station generally only can demodulate a received signal within a certain power range, if the power of the received signal is too small, the received signal is submerged in the noise floor of the receiver and cannot be demodulated, and if the power of the received signal is too large, the device is saturated and the signal is distorted and cannot be demodulated. In view of the foregoing, the prior art generally employs two modes of fixed gain control or dynamic gain control to adjust the gain of the receiving link of the base station.
The fixed gain control is to configure the base station receiving link gain to be a fixed value according to the device performance and the application scene requirement of the product. The fixed gain control mode has the following problems that 1, the performance requirement on an ADC device is high (the ADC is required to support a larger input power range), 2, the fixed gain control mode cannot be suitable for a scene with a larger fluctuation range of the received signal power of a base station, and 3, if the application scene is not matched with gain configuration, the performance loss is caused.
The dynamic gain control is to self-adaptively adjust the gain of a receiving link according to the power of a receiving signal, and the specific method is to continuously detect the power of an ADC output signal through a base station, and if the power exceeds a certain threshold (too large or too small), the gain of the receiving link is adjusted to enable the ADC input signal to be in a reasonable range. The dynamic gain control mode has the following problems that 1, because gain adjustment of a receiving link is realized by an analog device, time delay is generated in detection and gain adjustment of ADC output signal power, if signal power change is fast, dynamic gain adjustment speed can not follow the speed of signal power change, so that performance is poor when signal power change is frequent, and 2, because gain adjustment of the analog device can lead to signal distortion for a period of time, each gain adjustment can lead to signal quality reduction in a certain period of time, so that demodulation performance of a base station is obviously reduced.
Based on the problems of the fixed gain control and the dynamic gain control, the embodiment of the application provides a gain control method of a receiving link of a base station, which is applied to the base station, and the base station dynamically adjusts the gain of the receiving link according to the power of a received signal, so that the demodulation performance of the received signal of the base station is improved. The base station receiving link refers to a link between a signal output point of the antenna module and a signal input point of the ADC. The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
Referring to fig. 1, fig. 1 is a flowchart of a method for controlling gain of a base station receiving link according to an embodiment of the present application, where the method for controlling gain of a base station receiving link specifically includes the following steps:
Step S101, for any terminal, calculating the uplink predicted power of the terminal according to the uplink characteristic parameter and the uplink control parameter of the terminal.
Step S102, for any uplink symbol, a scheduled terminal corresponding to the uplink symbol is obtained, and the total power corresponding to the uplink symbol is determined according to the uplink predicted power corresponding to the scheduled terminal.
Step 103, if the 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.
Step S104, determining the target gain of the receiving link according to the overflow gain and the calibration gain.
Specifically, in the above step S101, the uplink characteristic parameter includes a parameter related to a last transmitted signal of the terminal. It should be noted that, the specific implementation of the uplink characteristic parameter is not specifically limited in the embodiment of the present application, for example, the uplink characteristic parameter may include the power of the last transmitted signal reaching the ADC inlet and the signal bandwidth of the last uplink data channel signal.
As one embodiment, the power headroom reported by the user corresponds to a specific physical channel, e.g. the 5G communication protocol specifies the terminalReported power reservation(Units dB) corresponding to the userIs a certain uplink data channel signal of (a)Then the base station may determine according to the communication protocol rulesIs not limited by the signal bandwidth of (a)And counting the power of the transmitted signal when it reaches the ADC inlet(DBm) and SNR。
The uplink control parameters include parameters of the next transmission signal of the base station control terminal. It should be noted that, the specific implementation of the uplink control parameter in the embodiment of the present application is not specifically limited, and for example, the uplink control parameter includes a power adjustment signaling sent by the base station to the terminal and a bandwidth of a next transmission signal.
As one embodiment, the base station first calculates the maximum power of the terminal's transmit signal to the ADC entrance according to the following formula(In dBm):
;
then determining the power adjustment signaling sent to the terminal according to the next signal service type, channel bandwidth and base station demodulation capability of the terminal (In dB, the function is to increase or decrease the power spectral density of the transmitted signal and ensure that the maximum transmitted power of the terminal is not exceeded) so that the terminal can have a certain signal quality level the next time the transmitted signal arrives at the base station.
The uplink predicted power characterizes the power of the next transmitted signal of the terminal to the ADC entry.
It will be appreciated that the base station may receive the transmission signals sent by the plurality of terminals, and for any one of the plurality of terminals, may calculate the uplink predicted power of the terminal according to the uplink characteristic parameter and the uplink control parameter of the terminal.
It should be noted that, in the embodiment of the present application, the specific implementation manner of calculating the uplink predicted power is not specifically limited, and those skilled in the art may make appropriate adjustments according to the actual situation. The uplink predicted power may be calculated, for example, according to the following formula:
;
Wherein, For terminalsThe next time the signal bandwidth is transmitted.
In the step S102, the specific meaning of the uplink symbol in the embodiment of the present application may be different according to different protocol specifications, which is not specifically limited in the embodiment of the present application. For example, in a 5G system, the base station and the terminal each transmit signals using orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) technology, where the uplink symbol may refer to 1 OFDM symbol transmitted by the terminal to the base station.
The scheduled terminal refers to a terminal set that can perform data transmission on a specific uplink symbol. It can be appreciated that the uplink transmission resource is divided in the time domain into a plurality of uplink symbols, for any one of the plurality of uplink symbolsThe uplink symbol can be obtainedCorresponding set of scheduled terminals. As an embodiment, the set of scheduled terminals may be obtained according to system scheduling information。
Further, the base station may determine the total power corresponding to the uplink symbol according to the uplink predicted power corresponding to the scheduled terminal. As one embodiment, the total power may be determined according to the following formula:
。
After the above step S102, the base station may determine the uplink symbolWhether or not the uplink symbol carries service data, ifIf no service data is carried on it, the gain of the receiving link may not be adjusted, if the uplink symbolAnd if the service data is carried on the receiving link, the gain of the receiving link can be adjusted. In the embodiment of the present application, the target gain of the receiving link may be determined by performing the subsequent step S103 and step S104.
In step S103, the peak-to-average ratio of the received signal is the ratio of the peak power to the average power of the received signal. As one embodiment, the peak-to-average ratio of the received signalThe value range of (unit dB) can be。
The maximum input signal power supported by the ADCs of different models is different, so that the maximum input signal power supported by the ADCs can be obtained by inquiring a device manual or testing(Units dbm).
According to the total power determined in the above step S102And the peak-to-average ratio of the received signalMaximum input signal power supported by ADCAnd calculating the overflow gain corresponding to the receiving link of the base station. Further, in the step S104, a target gain of the receiving link may be determined according to the overflow gain and the calibration gain.
The calibration gain is a gain determined before the terminal accesses the cell and used for calibrating the gain of the receiving link. It will be appreciated that the calibration gains may be the same or different in different operating scenarios, and as an embodiment, may be determined based on the performance of the ADC.
It should be noted that the gain of the receiving link may include the gain of the digitally controlled attenuator (DIGITAL STEP Attenuator, DSA) and other gains besides DSA, where the gain of DSA is an adjustable gain and the other gains besides DSA are fixed gains. Therefore, the calibration gain and the target gain in the embodiments of the present application may refer to the gain of the DSA, or may refer to the overall gain of the receiving link (i.e., the gain of the DSA plus the fixed gain), which is not specifically limited in the embodiments of the present application.
In the scheme, a dynamic gain control method is adopted to dynamically adjust the gain of a receiving link according to the power of a receiving signal, so that even if the power fluctuation range of the receiving signal reaches an ADC is large, the requirement of the ADC on the power of an input signal can be met when the receiving signal reaches an ADC inlet, and the demodulation performance of the base station for the receiving signal can be improved. In addition, the service type and the received power of the received signal are prejudged in advance by combining the high-layer scheduling information and the physical layer measurement information of the base station, the gain is not adjusted for the uplink symbol without service, and the calculation of the target gain is completed in advance for the uplink symbol with service, so that unnecessary gain adjustment is avoided, and the gain adjustment speed is increased.
Further, on the basis of the above embodiment, an implementation of determining the overflow gain is described below. In this embodiment, the step S103 may specifically include the following steps:
Will uplink symbol The difference between the corresponding total power and the peak-to-average ratio of the received signal and the maximum input signal power supported by the ADC is determined as the spillover gain corresponding to the receive link of the base station.
Specifically, the overflow gain may be determined according to the following formula:
。
In the scheme, 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 overflow gain, the requirement of the ADC on the input signal power is met when the received signal reaches an ADC inlet, and the demodulation performance of the base station for the received signal is improved.
Further, on the basis of the above-described embodiment, an implementation of determining the target gain is described below. In this embodiment, the step S104 may specifically include the following steps:
If the overflow gain corresponding to the receiving link of the base station is larger than the gain threshold, determining the target gain corresponding to the receiving link of the base station as the difference between the calibration gain and the overflow gain, otherwise, determining the target gain corresponding to the receiving link of the base station as the calibration gain.
Specifically, the embodiment of the present application does not limit the specific implementation manner of the gain threshold, and those skilled in the art may appropriately adjust the gain threshold according to practical situations, for example, the gain threshold may be 0dB, 0.1 dB, or-0.1 dB.
To calibrate gainTarget gainFor example, the target gain can be determined according to the following formula:
。
In the scheme, when the overflow gain is larger than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the overflow gain, so that the requirement of the ADC on the input signal power is met when the receiving signal reaches the ADC inlet, and the demodulation performance of the base station for the receiving signal is improved.
Further, on the basis of the above embodiment, before the step S101, the method for controlling gain of the base station receiving link according to the embodiment of the present application may further include the following steps:
Step 1), the gain of the receiving link is configured as an initial gain.
And 2) determining a calibration gain according to the initial gain and the ADC input noise power.
Step 3), the gain of the link is configured as a calibration gain.
Specifically, in step 1), the initial gain is an initial gain determined before the terminal accesses the cell, so as to ensure that the ADC has higher quantization accuracy for the low-power signal. As an embodiment, the initial gain may be determined based on the performance of the ADC. It should be noted that, the initial gain in the embodiment of the present application may refer to the gain of the DSA, or may refer to the overall gain of the receiving link (i.e., the gain of the DSA plus a fixed gain), which is not specifically limited in the embodiment of the present application.
In the step 2), since no service data exists at this time, the input signal of the ADC is the system noise of the receiving link, so that the ADC input noise power can be obtained by calculating the input power of the ADC, and the calibration gain can be determined according to the initial gain and the ADC input noise power.
It will be appreciated that steps 1) to 3) above may be performed before the initial access of the terminal, that is, before the base station starts to establish a cell, the gain of the base station receiving link may be first configured as an 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 be a calibration gain.
In the scheme, the gain of the receiving link is initialized according to the ADC performance, so that the ADC is guaranteed to have higher quantization precision on the low-power signal, and then the gain of the receiving link is calibrated according to the ADC input noise power in consideration of different background noise levels of different working scenes, so that the receiver can be guaranteed to have higher ADC quantization precision on the terminal access signal in different working scenes.
Further, based on the above embodiment, the gain is calibratedInitial gainReferring to the gain of DSA as an example, the calibration gain can be calculated according to the following formula:
;
Wherein, For the receiver background noise relative gain threshold,The noise power is input for the ADC,The background noise power is fixed for the ADC.
Specifically, the receiver background noise relative gain thresholdCharacterizing the natural noise floor is equivalent to the gain of the ADC noise floor, affecting the sensitivity of the receiver. As one embodiment, the range of the receiver noise floor relative gain threshold can be。
ADC fixed background noise powerCan be obtained through a device manual or test, and can be specifically described as that the ADC generates a background noise with a certain power at an output end when in operation, and the background noise is equivalent to the power ofIs input to the output generated after the ADC.
In the above formulaThis part characterizes the difference between the initial gain and the calibration gain, i.e. if the initial gain is the same as the calibration gainThis portion is equal to 0.
In the scheme, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the initial gain, so that the ADC is ensured to have higher quantization precision on the low-power signal.
Further, based on the above embodiment, the gain is calibratedInitial gainReferring to the gain of DSA as an example, the initial gain may be calculated according to the following formula:
;
Wherein, In order to receive the operating bandwidth of the link,Is a fixed gain for the receive chain.
Specifically, in the above formulaThis section characterizes the theoretical power of the natural background noise, and the above formula characterizes the power of the natural background noise versus the background noise power of the ADC quantization, the background noise relative gain threshold of the large receiver.
In the scheme, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link is calibrated based on the calibration gain, so that the receiver can ensure higher ADC quantization precision on terminal access signals in different working scenes.
Further, on the basis of the above embodiment, after the step S104, the gain control method for a base station receiving link provided by the embodiment of the present application may further include the following steps:
at the start time of the reception of the uplink symbol, the gain of the reception link is adjusted to a target gain.
Specifically, taking a 5G communication system as an example, since the starting position of receiving an OFDM symbol in the 5G communication system is the beginning of a Cyclic Prefix (CP), and CP data does not participate in the signal demodulation process, the target gain value is calculated in advance and the analog device is controlled to take effect at the starting receiving time of the uplink symbol (i.e., the starting position of each uplink symbol CP), which avoids the influence of signal distortion in the gain adjustment process on the demodulation performance.
In the above scheme, the target gain is calculated in advance and the analog device is controlled to take effect at the initial receiving time of the uplink symbol, and since the data of the initial position of the uplink symbol does not generally participate in the signal demodulation process, the influence of the signal distortion in the gain adjustment process on the demodulation performance can be avoided.
Referring to fig. 2, fig. 2 is a block diagram of a gain control device of a base station receiving link according to an embodiment of the present application, where the gain control device 200 of the base station receiving link includes a first calculating module 201 configured to calculate, for any one of terminals, an uplink predicted power of the terminal according to an uplink characteristic parameter of the terminal and an uplink control parameter, where the uplink characteristic parameter includes a parameter related to a last transmission signal of the terminal, the uplink control parameter includes a parameter of a base station controlling a next transmission signal of the terminal, the uplink predicted power characterizes a power of the next transmission signal of the terminal reaching an ADC inlet, an obtaining module 202 configured to obtain, for any one of uplink symbols, 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, and a second calculating module 203 configured to determine, if a certain uplink symbol carries traffic data, an input signal corresponding to the total power corresponding to the uplink symbol, a peak-to-average ratio of a received signal, and a maximum input signal supported by an ADC, according to the uplink predicted power, and determine a gain of the base station corresponding to the uplink received signal, and determine an overflow gain according to the calculated gain.
In the scheme, a dynamic gain control method is adopted to dynamically adjust the gain of a receiving link according to the power of a receiving signal, so that even if the power fluctuation range of the receiving signal reaches an ADC is large, the requirement of the ADC on the power of an input signal can be met when the receiving signal reaches an ADC inlet, and the demodulation performance of the base station for the receiving signal can be improved. In addition, the service type and the received power of the received signal are prejudged in advance by combining the high-layer scheduling information and the physical layer measurement information of the base station, the gain is not adjusted for the uplink symbol without service, and the calculation of the target gain is completed in advance for the uplink symbol with service, so that unnecessary gain adjustment is avoided, and the gain adjustment speed is increased.
Further, on the basis of the above embodiment, the second calculating 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.
In the scheme, 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 overflow gain, the requirement of the ADC on the input signal power is met when the received signal reaches an ADC inlet, and the demodulation performance of the base station for the received signal is improved.
Further, on the basis of the foregoing embodiment, the first determining module 204 is specifically configured to determine the target gain as a difference between the calibration gain and the overflow gain if the overflow gain is greater than a gain threshold, and determine the target gain as the calibration gain if not.
In the scheme, when the overflow gain is larger than the gain threshold, the gain of the receiving link can be dynamically adjusted according to the overflow gain, so that the requirement of the ADC on the input signal power is met when the receiving signal reaches the ADC inlet, and the demodulation performance of the base station for the receiving signal is improved.
Further, on the basis of the foregoing embodiment, 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, and a second configuration module configured to configure the gain of the link as the calibration gain.
In the scheme, the gain of the receiving link is initialized according to the ADC performance, so that the ADC is guaranteed to have higher quantization precision on the low-power signal, and then the gain of the receiving link is calibrated according to the ADC input noise power in consideration of different background noise levels of different working scenes, so that the receiver can be guaranteed to have higher ADC quantization precision on the terminal access signal in different working scenes.
Further, on the basis of the above embodiment, the second determining module is specifically configured to calculate the calibration gain according to the following formula:
;
Wherein, For the purpose of the said calibration gain,For the initial gain to be the same as the initial gain,For the receiver background noise relative gain threshold,A noise power is input for the ADC,The background noise power is fixed for the ADC.
In the scheme, the initial gain can be determined according to the ADC performance, and the gain of the receiving link is initialized based on the initial gain, so that the ADC is ensured to have higher quantization precision on the low-power signal.
Further, on the basis of the above embodiment, 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:
;
Wherein, For the operating bandwidth of the receiving link,Is a fixed gain for the receive chain.
In the scheme, the calibration gain can be determined according to the ADC input noise power, and the gain of the receiving link is calibrated based on the calibration gain, so that the receiver can ensure higher ADC quantization precision on terminal access signals in different working scenes.
Further, on the basis of the above embodiment, the gain control device 200 of the base station receiving link further includes an adjusting module, configured to adjust the gain of the receiving link to the target gain at the starting time of receiving the uplink symbol.
In the above scheme, the target gain is calculated in advance and the analog device is controlled to take effect at the initial receiving time of the uplink symbol, and since the data of the initial position of the uplink symbol does not generally participate in the signal demodulation process, the influence of the signal distortion in the gain adjustment process on the demodulation performance can be avoided.
Referring to fig. 3, fig. 3 is a block diagram of an electronic device 300 according to an embodiment of the present application, where 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 for direct connection communication of these components, the communication interface 302 is used for signaling or data communication with other node devices, and the memory 303 stores machine readable instructions executable by the processor 301. When the electronic device 300 is in operation, the processor 301 and the memory 303 communicate via the communication bus 304, and the machine readable instructions, when invoked by the processor 301, perform the gain control method of the base station receive chain described above.
For example, the processor 301 of the embodiment of the present application reads a computer program from the memory 303 through the communication bus 304 and executes the computer program to implement a method of calculating, for any terminal, an uplink predicted power of the terminal according to an uplink characteristic parameter of the terminal and an uplink control parameter, where the uplink characteristic parameter includes a parameter related to a last transmission signal of the terminal, the uplink control parameter includes a parameter of a base station controlling a next transmission signal of the terminal, the uplink predicted power characterizes a power of the next transmission signal of the terminal reaching an ADC entrance, for any uplink symbol, acquiring a scheduled terminal corresponding to the uplink symbol, determining a total power corresponding to the uplink symbol according to the uplink predicted power corresponding to the scheduled terminal, calculating, if a certain uplink symbol carries traffic data, an overflow gain corresponding to a receiving link of the base station according to the total power corresponding to the uplink symbol, a peak-to-average ratio of a receiving signal, and a maximum input signal power supported by the ADC, and determining the overflow gain according to the overflow gain and a calibrated target gain.
The processor 301 includes one or more, which may be an integrated circuit chip, having signal processing capabilities. The Processor 301 may be a general-purpose Processor including a central processing unit (Central Processing Unit, CPU), a micro control unit (Micro Controller Unit, MCU), a network Processor (Network Processor, NP) or other conventional Processor, or may be a special-purpose Processor including a neural network Processor (Neural-network Processing Unit, NPU), a graphics Processor (Graphics Processing Unit, GPU), a digital signal Processor (DIGITAL SIGNAL Processor, DSP), an Application SPECIFIC INTEGRATED Circuits (ASIC), a field programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. Also, when the processor 301 is plural, some of them may be general-purpose processors, and another may be special-purpose processors.
The Memory 303 includes one or more, which may be, but is not limited to, random access Memory (Random Access Memory, RAM for short), read Only Memory (ROM for short), programmable Read Only Memory (Programmable Read-Only Memory, PROM for short), erasable programmable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), electrically erasable programmable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM for short), and the like.
It is to be understood that the configuration shown in fig. 3 is merely illustrative, and that electronic device 300 may also include more or fewer components than those shown in fig. 3, or have a different configuration than that shown in fig. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination thereof. In the embodiment of the present application, the electronic device 300 may be, but is not limited to, a physical device such as a desktop, a notebook, a smart phone, an intelligent wearable device, a vehicle-mounted device, or a virtual device such as a virtual machine. In addition, the electronic device 300 is not necessarily a single device, and may be a combination of a plurality of devices, for example, a server cluster, or the like.
The embodiment of the application also provides a computer program product, comprising a computer program stored on a computer readable storage medium, the computer program comprising computer program instructions, when the computer program instructions are executed by a computer, the computer is capable of executing the steps of the gain control method of a base station receiving link in the above embodiment, for example, comprising the step of S101, for any terminal, calculating uplink predicted power of the terminal according to uplink characteristic parameters and uplink control parameters of the terminal. Step S102, for any uplink symbol, a scheduled terminal corresponding to the uplink symbol is obtained, and the total power corresponding to the uplink symbol is determined according to the uplink predicted power corresponding to the scheduled terminal. Step 103, if the 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. Step S104, determining the target gain of the receiving link according to the overflow gain and the calibration gain.
The embodiment of the application also provides a computer readable storage medium, which stores computer program instructions, when the computer program instructions are executed by a computer, the computer is caused to execute the gain control method of the base station receiving link in the embodiment of the method.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
Further, the units described as separate units may or may not be physically separate, and units displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Furthermore, functional modules in various embodiments of the present application may be integrated together to form a single portion, or each module may exist alone, or two or more modules may be integrated to form a single portion.
It should be noted that the functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. The storage medium includes a U disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A method for gain control of a base station receive chain, comprising:
Calculating uplink predicted power of any terminal according to uplink characteristic parameters of the terminal and uplink control parameters, wherein the uplink characteristic parameters comprise parameters related to a last transmitted signal of the terminal, the uplink control parameters comprise parameters of a next transmitted signal of the base station control the terminal, and the uplink predicted power represents the power of the next transmitted signal of the terminal reaching an ADC (analog to digital converter) inlet;
for any uplink symbol, a scheduled terminal corresponding to the uplink symbol is obtained, and the total power corresponding to the uplink symbol is determined according to the uplink predicted power corresponding to the scheduled terminal;
If a certain uplink symbol carries service data, calculating an overflow gain corresponding to a receiving link of the base station according to the total power corresponding to the uplink symbol, the peak-to-average ratio of a received signal and the maximum input signal power supported by an ADC (analog to digital converter);
Determining 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 a gain threshold, determining the target gain as a difference between the calibration gain and the overflow gain, otherwise, determining the target gain as the calibration gain;
Before the calculating, for any terminal, the uplink predicted power of the terminal according to the uplink characteristic parameter and the uplink control parameter of the terminal, the method further includes:
Configuring the gain of the receiving link as an initial gain, wherein the initial gain is determined based on the theoretical power of natural background noise, the ADC fixed background noise power, the fixed gain of the receiving link and a receiver background noise 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 as the calibration gain.
2. The method according to claim 1, wherein 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 comprises:
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 method of gain control of a base station receive chain of claim 1, wherein said determining the calibration gain based on the initial gain and ADC input noise power comprises:
the calibration gain is calculated according to the following formula:
;
Wherein, For the purpose of the said calibration gain,For the initial gain to be the same as the initial gain,For the receiver floor noise relative gain threshold,A noise power is input for the ADC,And fixing the background noise power for the ADC.
4. A method for gain control of a base station receiving link according to claim 3, characterized in that before said configuring the gain of the receiving link to an initial gain, the method further comprises:
The initial gain is calculated according to the following formula:
;
Wherein, For the operating bandwidth of the receiving link,Is a fixed gain for the receive chain.
5. The method according to any one of claims 1-4, wherein after said determining a target gain of said receiving link from said overflow gain and a calibration gain, said method further comprises:
And at the starting moment of the uplink symbol reception, the gain of the receiving link is adjusted to the target gain.
6. A computer program product comprising computer program instructions which, when read and executed by a processor, perform the method of gain control of a base station receive chain according to any of claims 1-5.
7. An electronic device is characterized by comprising a processor, a memory and a bus;
the processor and the memory complete communication with each other through the bus;
the memory stores computer program instructions executable by the processor, the processor invoking the computer program instructions to perform the method of gain control of a base station receive link as claimed in any of claims 1-5.
8. A computer readable storage medium storing computer program instructions which, when executed by a computer, cause the computer to perform the method of gain control of a base station receive chain according to any one of claims 1 to 5.
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| CN103188787A (en) * | 2011-12-31 | 2013-07-03 | 重庆重邮信科通信技术有限公司 | Automatic gain control method and device |
| CN112312534A (en) * | 2020-10-30 | 2021-02-02 | 展讯通信(天津)有限公司 | Method and system for adjusting receiving link gain and intelligent terminal |
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| CN103188787A (en) * | 2011-12-31 | 2013-07-03 | 重庆重邮信科通信技术有限公司 | Automatic gain control method and device |
| CN112312534A (en) * | 2020-10-30 | 2021-02-02 | 展讯通信(天津)有限公司 | Method and system for adjusting receiving link gain and intelligent terminal |
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