CN116634543A - Gain control method, device, communication node and medium - Google Patents
Gain control method, device, communication node and medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/223—TPC being performed according to specific parameters taking into account previous information or commands predicting future states of the transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/228—TPC being performed according to specific parameters taking into account previous information or commands using past power values or information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a gain control method, a gain control device, a communication node and a medium. The method comprises the following steps: determining an initial average power value of a sampling signal in a current statistical period; determining a target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period, the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period; determining a target communication gain value based on the communication gain value, the target average power value and the optimal power threshold value of the current statistical period; the target communication gain value is taken as the communication gain value of the next statistical period of the variable gain power amplifier. The invention reduces the influence of wireless channel fading and burst interference on the wireless communication quality in a large-scale MIMO-OFDM communication system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a gain control method, a gain control device, a communication node, and a medium.
Background
In a wireless communication system, due to factors such as wireless channel fading (including fast fading and slow fading), interference noise and the like, the signal power received by a receiving end antenna is large and small. In order to make the signal power received by the signal processing module stable in a more ideal range, a scheme capable of dynamically adjusting the receiving gain is often needed to be added between the antenna and the signal processing module.
In a massive MIMO-OFDM (Multiple In Multiple Out-Orthogonal Frequency Division Multiplexing, MIMO-OFDM) system, since the massive MIMO-OFDM system is usually accompanied by beamforming, for example, a broadcast channel transmitted by a base station is a wide beam, a communication signal received by a terminal is low in power, and a traffic channel is a narrow beam after beamforming, the received communication signal is much higher in power, and therefore, a gain value cannot be adjusted by estimating a signal power using a special symbol (for example, a broadcast channel).
Massive MIMO-OFDM systems typically transmit time domain signals in frames, subframes, or symbols, for which the required reception gain cannot be changed, otherwise inter-carrier interference is introduced.
Disclosure of Invention
The invention provides a gain control method, a gain control device, a communication node and a medium, which solve the problem of communication quality fluctuation caused by factors such as wireless channel fading, interference noise and the like in the prior art.
According to an aspect of the present invention, there is provided a gain control method applied to a first communication node configuring a variable gain power amplifier, comprising:
determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node;
determining a target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period, the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period;
determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value;
and taking the target communication gain value as the communication gain value of the next statistical period of the variable gain power amplifier.
According to another aspect of the present invention, there is provided a gain control apparatus for use in a first communication node configuring a variable gain power amplifier, comprising:
The first determining module is used for determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node;
the second determining module is used for determining the target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period and the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period;
a third determining module, configured to determine a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value;
and a fourth determining module, configured to take the target communication gain value as a communication gain value of a next statistical period of the variable gain power amplifier.
According to another aspect of the present invention there is provided a communications node comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the gain control method according to any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement a gain control method according to any one of the embodiments of the present invention when executed.
According to the technical scheme, the target average power values of the first statistical period and the second statistical period which are positioned before the current statistical period are obtained, and the communication gain value of the next statistical period is adjusted in a weighted mode based on the target average power values of the first statistical period and the second statistical period which are used as historical data and the initial average power value in the current statistical period, so that fluctuation of the communication quality caused by the burst interference noise is reduced; and determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value. The invention has accurate communication gain value, and effectively reduces the influence of wireless channel fading and burst interference on the wireless communication quality in a large-scale MIMO-OFDM communication system.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic communication diagram of a massive MIMO system according to an embodiment of the present invention;
fig. 2 is a schematic structural configuration diagram of a system frame according to an embodiment of the present invention;
fig. 3 is a flowchart of a gain control method according to an embodiment of the present invention;
FIG. 4 is a flow chart of another gain control method provided by an embodiment of the present invention;
FIG. 5 is a flow chart of yet another gain control method provided by an embodiment of the present invention;
fig. 6 is a schematic diagram of adjustment of AGC before terminal access according to an embodiment of the present invention;
fig. 7 is a schematic diagram of AGC adjustment after terminal access according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a gain control apparatus according to an embodiment of the present invention;
fig. 9 is a block diagram of a communication node according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," "initial," and "target," and the like in the description and claims of the present invention and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Wireless communication has been actively developed in recent decades from the first generation mobile communication system to the fifth generation mobile communication system in use today, and has been closely related to the daily life of humans. Due to the rapid increase of the user demands, the mobile communication system needs to further increase the transmission rate, and on the basis of this, many related technologies have been developed, such as OFDM, with higher spectrum utilization, and more antennas, such as MIMO, are used in mobile communication.
The MIMO multi-input multi-output technology can improve the transmission service with higher speed and reliability for users by increasing the number of antennas at a base station end, and can improve the receiving power of the MIMO multi-input multi-output technology at a specific angle by matching with beam forming, so that the coverage range is wider, and the performance of a communication system is obviously improved. The orthogonal frequency division multiplexing OFDM has strong multipath interference resistance and high spectrum utilization rate, and can obtain higher spectrum utilization rate and bear more information in spectrum by combining the OFDM with a large-scale MIMO system. And OFDM can provide higher anti-interference capability for a large-scale MIMO system, and reduce the complexity of channel equalization. While massive MIMO can provide higher transmission rates and coverage for OFDM systems through antenna scaling and beamforming. Therefore, the massive MIMO-OFDM system is a great achievement in the field of wireless communication and is one of the main research technologies at present.
The automatic gain control (Automatic Gain Control, AGC) technique is an automatic control circuit or control algorithm that keeps the amplitude of the output signal constant or varies over a small range in the event that the amplitude of the input signal varies greatly. In a communication receiver system, due to the influence of various factors such as the size of transmitting power, the distance between transmitting and receiving, wireless path fading and the like, the signal received in the receiver can greatly fluctuate, the ADC is saturated due to the overlarge signal, the ADC quantization error is increased due to the overlarge signal, and at this time, higher gain can not be obtained by the software processing of the later stage, and the signal can not be demodulated. AGC is a technology that is developed to solve this problem, and it can keep the signal entering the ADC within a certain range, and improve the signal-to-noise ratio of the system. AGC techniques are generally classified into analog AGC, digital AGC, and digital AGC. The analog AGC is formed by building a pure analog circuit, and the gain value of the variable gain power amplifier is adjusted through a voltage feedback loop; the numerical control AGC is composed of analog and digital components, and an analog part is usually a variable gain power amplifier; the digital part is realized by sampling the ADC into a signal of a digital system, carrying out a certain algorithm, and then sending a gain value to a variable gain power amplifier through an external interface. The digital AGC is realized in a pure digital domain, and the input and gain feedback of signals are realized by an algorithm.
The analog AGC is realized in a pure analog domain, so that hardware devices and complex circuits are required to be added, the realization complexity and the cost are both increased, and in addition, the hardware system parameters are difficult to realize adjustability and controllability and basically only correspond to certain application scenes one by one, so that the expansibility is low.
The pure digital AGC is simple to realize, the system parameters are flexible and adjustable, but the input of the pure digital AGC is a pure digital signal, and if the input signal of the pure digital AGC has serious distortion, the AGC system cannot be adjusted anyway to greatly improve the system.
Fig. 1 is a schematic communication diagram of a massive MIMO system according to an embodiment of the present invention. As shown in fig. 1, the MIMO system includes N base station antennas and 2 terminals, wherein the 2 terminals can access the base station at the same time and perform uplink and downlink traffic communication with the base station. The embodiment of the invention is described as a terminal side of a receiver.
Fig. 2 is a schematic structural configuration diagram of a system frame according to an embodiment of the present invention. As shown in fig. 2, 10ms is a frame, and a frame includes 10 subframes, each of which has a length of 1ms, and each of which includes 14 OFDM symbols. The physical broadcast channel (Physical Broadcast Channel, PBCH) is the 8 th, 9 th, 10 th and 11 th symbol of the first subframe (i.e., subframe 0) in the even frame, and the terminal accesses the base station using the channel and then performs subsequent communications.
In an embodiment, fig. 3 is a flowchart of a gain control method according to an embodiment of the present invention, where the method may be implemented by a gain control device, which may be implemented in hardware and/or software, and the gain control device may be configured in a first communication node, where the gain control device is applicable to a case of dynamically adjusting a communication gain value in a MIMO-OFDM system. Wherein the variable gain power amplifier is configured at the first communication node. In an embodiment, the first communication node refers to a terminal side, for example, the first communication node may be a User Equipment (UE). As shown in fig. 3, the method includes:
s110, determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node.
Wherein the current statistical period is at least greater than the length of one OFDM symbol. The current statistical period refers to a period of one gain adjustment by the first communication node after the first communication node successfully accesses the second communication node. In an embodiment, the current statistical period may be an integer multiple of any subframe. Illustratively, the current statistical period may be one continuous downlink slot, i.e. 3 downlink subframes (3 ms). In an embodiment, the sampled signal may be an OFDM signal that is not beamformed. The length of the current statistical period is reasonably set, and interference among subcarriers caused by inconsistent gains in a single symbol is avoided.
In one embodiment, S110 includes S1101-S1103:
s1101, dividing the current statistical period according to a preset statistical interval to obtain at least two corresponding communication subintervals.
The preset statistical interval is used to characterize a duration of performing power statistics on the sampled signal once, for example, the preset statistical interval may be one OFDM symbol. In an embodiment, the number of communication subintervals is a ratio between the current statistical period and a preset statistical interval. For example, assuming that the preset statistical interval is one OFDM symbol, the current statistical period is 3 downlink subframes, and each downlink subframe includes 14 OFDM symbols, the number of communication subintervals is 42.
S1102, determining the actual power value of each communication subinterval.
In an embodiment, the actual power value refers to the power value of the sampled signal within each communication sub-interval.
S1103, taking the maximum actual power value in the current statistical period as the initial average power value of the sampling signal in the current statistical period.
In an embodiment, the actual power value of each communication subinterval in the current statistical period is analyzed and compared to determine the maximum actual power value in the current statistical period, and the maximum actual power value is used as the initial average power value of the sampling signal in the current statistical period. In an embodiment, the maximum actual power value is taken as the initial average power value of the sampled signal in the current statistical period, so as to avoid bit overflow of the analog-digital converter. It can be understood that in the statistical period, there are signals in some communication subintervals and signals in some communication subintervals, if a direct averaging method is adopted, the initial average power is reduced, and the invention avoids the problem of large power statistical fluctuation caused by the difference of downlink scheduling modes by using the maximum power in the interval as the average power.
S120, determining the target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period and the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period.
Wherein the first statistical period and the second statistical period are at least one period before the current statistical period. In an embodiment, the power statistics results of several statistics periods before the current statistics period may be adjusted by using a certain weight value to obtain a corresponding target average power value, so as to avoid the influence of instantaneous interference caused by burst noise on the gain adjustment result.
In one embodiment, S120 includes: S1201-S1202:
s1201, determining a product value between a target average power value of the sampling signal in the first statistical period and a weight value of the corresponding statistical period, a product value between a target average power value of the sampling signal in the second statistical period and a weight value of the corresponding statistical period, and a product value between an initial average power value of the sampling signal in the current statistical period and a weight value of the corresponding statistical period.
The first statistical period refers to two periods before the current statistical period and is recorded as the first two statistical periods; the second statistical period refers to a period preceding the current statistical period, noted as the previous statistical period. The sum of the weight value corresponding to the first statistical period, the weight value corresponding to the second statistical period, and the weight value corresponding to the current statistical period is 1.
S1202, determining a target average power value of the sampling signal in the current statistical period according to the addition value of the product values.
In an embodiment, the product value corresponding to the first statistical period, the product value corresponding to the second statistical period, and the product value corresponding to the current statistical period are added to obtain the target average power value of the sampling signal in the current statistical period. It should be noted that, the calculation manner of the target average power value of the sampled signal in the first statistical period and the calculation manner of the target average power value of the sampled signal in the second statistical period are similar to the calculation manner of the target average power value of the sampled signal in the current statistical period, and are not repeated here.
For example, assume that the weight value corresponding to the first statistical period, the weight value corresponding to the second statistical period, and the weight value corresponding to the current statistical period are a, b, and c, respectively; the target average power value corresponding to the first statistical period, the target average power value corresponding to the second statistical period and the initial average power value corresponding to the current statistical period are respectively P i-2 ，P i-1 And P i . Wherein i is an integer greater than 1, the target average power value P of the sampling signal in the current statistical period now ＝a*P i-2 +b*P i-1 +c*P i 。
S130, determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value.
The communication gain value of the current statistical period refers to a gain value in a process of transmitting service data between the second communication node and the first communication node in the current statistical period after the first communication node successfully accesses the second communication node.
In one embodiment, S130 includes: s1301 to S1302:
s1301, determining a ratio of a preconfigured optimal power threshold value to a target average power value as a corresponding first ratio.
The optimal power threshold value refers to a preset ideal power threshold value, and is a fixed value.
S1302, determining a target communication gain value according to the first ratio and the communication gain value of the current statistical period.
In an embodiment, a ratio between the optimal power threshold value and the target average power value is taken as a first ratio, then a logarithm based on 10 is calculated, the first ratio is a true number, and an addition value of the logarithm and a communication gain value of the current statistical period is taken as a corresponding target communication gain value.
And S140, taking the target communication gain value as the communication gain value of the next statistical period of the variable gain power amplifier.
In an embodiment, the target communication gain value may be directly used as a communication gain value of the variable gain power amplifier during a statistical period, and the power may be amplified based on the communication gain value.
According to the technical scheme, the communication gain value of the next statistical period is adjusted in a weighted mode based on the target average power values of the first statistical period and the second statistical period which are used as historical data and the target average power value in the current statistical period by acquiring the target average power values of the first statistical period and the second statistical period which are positioned before the current statistical period, so that fluctuation of the communication quality caused by the burst interference noise is reduced; and determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value, and taking the target communication gain value as the communication gain value of the next statistical period of the variable gain power amplifier. The invention has accurate communication gain value and effectively solves the problem of communication quality fluctuation.
By setting the current statistical period to be at least more than one OFDM symbol, the inter-subcarrier interference caused by inconsistent gains in a single symbol is avoided.
In an embodiment, fig. 4 is a flowchart of another gain control method according to the embodiment of the present invention, where the determining process of the target gain adjustment value is described before the first communication node successfully accesses the second communication node on the basis of the above embodiment. As shown in fig. 4, the method includes:
s210, determining an average power value of the target communication signal received in a preset time period as a first average power value.
The target communication signal refers to a communication signal after power amplification and analog-to-digital conversion of an original communication signal in sequence. In an embodiment, the first communication node receives an original communication signal sent by the second communication node, and performs power amplification and analog-to-digital conversion on the original communication signal to obtain a corresponding target communication signal. And then counting the power value of each moment of the target communication signal in a preset time period, adding the power values of each moment to obtain a corresponding power value sum, and taking the ratio between the power value sum and the total duration of the preset time period as a corresponding average power value and recording the corresponding average power value as a first average power value. The second communication node is equipment for carrying out communication transmission with the first communication node. The second communication node may be a base station, for example.
S220, determining a target gain adjustment value according to a comparison result between the first average power value and a preset power range and a comparison result between a current gain value corresponding to the variable gain power amplifier and the preset gain range.
The preset power range refers to a power range value formed by a plurality of preset power threshold values. In actual operation, the number of power threshold values is related to the maximum gain value of the variable gain power amplifier and the bit width of the analog-to-digital converter. The number of the preset power ranges is the same as the number of the power threshold values. Assuming that the number of the power threshold values is 7, the number of the preset power ranges is 7. Wherein the maximum gain value of the variable gain power amplifier is related to the characteristics of the variable gain power amplifier itself. Illustratively, the bit width of the analog-to-digital converter may be 14 bits or 16 bits; the maximum gain value of the variable gain power amplifier may be 30dbB. Under the condition that the maximum gain value of the variable gain power amplifier is fixed, the more the number of the power threshold values is, the smaller the corresponding gain step length is, and the larger the total time length needed by the first communication node to access the second communication node is. For example, assuming that the maximum gain value of the variable gain power amplifier may be 30dbB and the gain step size is 5dB, the number of power threshold values is 7, i.e. 6 adjustments are needed to complete one cycle supervision, and if each adjustment requires 1ms, i.e. 6ms is the total time length required for one cycle supervision. After determining the preset power range to which the first average power value belongs, comparing the current gain value of the variable gain power amplifier with the preset gain range, and determining the power value required to be adjusted for the current gain value, namely the target gain adjustment value.
In one embodiment, S220 includes S2201-S2202:
s2201, determining the gain adaptation condition according to the comparison result between the first average power value and the preset power range.
The gain adaptation condition is used for representing whether the current gain value of the variable gain power amplifier can be successfully accessed to the second communication node. The gain adaptation cases include: the three conditions of overlarge gain, proper gain and overlarge gain are adopted. In an embodiment, the current gain value of the variable gain power amplifier may be determined to be too large, suitable or too small according to the preset power range to which the first average power value belongs.
S2202, determining a target gain adjustment value according to a comparison result between the current gain value corresponding to the variable gain power amplifier and a preset gain range based on the gain adaptation condition.
In an embodiment, in case the current gain value of the variable gain power amplifier is too large, performing a reducing operation on the current gain value; under the condition that the current value gain value of the variable gain power amplifier is proper, the current gain value is not adjusted, namely the target gain adjustment value is 0; in case the current gain value of the variable gain power amplifier is too small, an increasing operation is performed on the current gain value. In an embodiment, the magnitude of the target gain adjustment value is related to the right end point (i.e., the maximum value) of the preset gain range corresponding to the current gain value and the maximum gain value of the variable gain power amplifier, so as to ensure that the gain value after the current gain value of the variable gain power amplifier is adjusted does not exceed the maximum gain value. For example, assuming a maximum gain value of 30dB for the variable gain power amplifier, the target gain adjustment value may be 5dB if the current gain value is 25dB or less; if the current gain value is greater than 25dB, the target gain adjustment value is the difference between 30 and the current gain value.
And S230, automatically adjusting the current gain value of the variable gain power amplifier according to the target gain adjustment value, and returning to the step of determining the average power of the target communication signal received in the preset time period until the first communication node is successfully accessed to the second communication node.
In an embodiment, after determining the target gain adjustment value, the current gain value of the variable gain power amplifier is automatically adjusted according to the gain adaptation situation. Specifically, if the gain adaptation condition is that the gain is too large, performing a reduction operation on the current gain value, namely reducing the target gain adjustment value on the basis of the current gain value to obtain a new current gain value; if the gain adaptation condition is that the gain is too small, an increasing operation is performed on the current gain value, namely, a target gain adjustment value is increased on the basis of the current gain value, and a new current gain value is obtained.
After the new current gain value is obtained, the variable gain power amplifier performs power amplification on the target communication signal according to the new current gain value, determines whether the first communication node can be successfully accessed to the second communication node, and if the first communication node is not successfully accessed to the second communication node, adjusts the current gain value again until the first communication node is successfully accessed to the second communication node.
S240, determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node.
Wherein the current statistical period is at least one OFDM symbol greater.
S250, determining the target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period and the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period.
Wherein the first statistical period and the second statistical period are at least one period before the current statistical period.
S260, determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value.
S270, taking the target communication gain value as the communication gain value of the next statistical period of the variable gain power amplifier.
According to the technical scheme of the embodiment, on the basis of the embodiment, the target gain adjustment value is determined through the comparison result between the average power value of the target communication signal received in the preset time period and the preset power range and the comparison result between the current gain value corresponding to the variable gain power amplifier and the preset gain range, and the current gain value of the variable gain power amplifier is dynamically adjusted according to the target gain adjustment value, so that the current gain value can quickly reach the gain value which can be successfully accessed to the second communication node, and the effect that the first communication node is quickly accessed to the second communication node is achieved.
In an embodiment, fig. 5 is a flowchart of still another gain control method according to an embodiment of the present invention, where a determination process of a target communication signal is described based on the above embodiment. As shown in fig. 5, the method includes:
s310, receiving an original communication signal sent by the second communication node.
The original communication signals refer to all unprocessed communication signals in the communication scene collected by the first communication node. The original communication signal may include, but is not limited to: noise signal, access signal and downlink reference signal in a communication scenario. In the actual operation process, the first communication node may collect the original communication signal sent by the second communication node by using the antenna.
And S320, performing power amplification on the original communication signal to obtain a corresponding power amplification signal.
In an embodiment, after the first communication node receives the original communication signal sent by the second communication node, the original communication signal is input to the variable gain power amplifier, so that the variable gain power amplifier performs power amplification on the original communication signal according to the current gain value to obtain a corresponding power amplification signal.
S330, performing analog-to-digital conversion on the power amplification signal to obtain a corresponding target communication signal.
In an embodiment, the power amplified signal is input to an analog-to-digital converter, so that the analog-to-digital converter performs analog-to-digital conversion on the power amplified signal to obtain a corresponding target communication signal. It is understood that the target communication signal is a digital signal and the original communication signal is an analog signal. In an embodiment, after the power amplification signal is converted into the target communication signal by the analog-to-digital converter, the target communication signal as the digital signal is input into the FPGA of the first communication node to cause the FPGA to perform signal processing on the target communication signal.
S340, determining an average power value of the target communication signal received in the preset time period as a first average power value.
S350, determining a target gain adjustment value according to a comparison result between the first average power value and a preset power range and a comparison result between a current gain value corresponding to the variable gain power amplifier and the preset gain range.
S360, automatically adjusting the current gain value of the variable gain power amplifier according to the target gain adjustment value, and returning to the step of determining the average power of the target communication signal received in the preset time period until the first communication node is successfully accessed to the second communication node. By automatically adjusting the current gain value, the first communication node (terminal) can be quickly accessed to the second communication node (base station) after being started.
According to the technical scheme of the embodiment, on the basis of the embodiment, the original communication signal is subjected to power amplification through the variable gain power amplifier, and the signal is subjected to analog-to-digital conversion by the analog-to-digital converter, so that the corresponding target communication signal is obtained, and the distortion degree of the target communication signal is reduced as much as possible.
In an embodiment, fig. 6 is a schematic diagram of adjustment of AGC before terminal access according to an embodiment of the present invention. In an embodiment, the first communication node is a terminal, the second communication node is a base station, the preset time period is a t time period, the maximum gain value of the variable gain power amplifier is 30dB, the preset power range is determined by 7 power threshold values (TH 1, TH2, TH3, TH4, TH5, TH6, and TH 7), and the target gain adjustment value may be 5dB, 10dB, 15dB, 20dB, or 30dB (the target gain adjustment value is the difference between the current gain value). As shown in fig. 6, the adjustment process of AGC before terminal access includes the following steps:
s1, counting signals in a t time period after acquisition of the ADC, and calculating to obtain a first average power value P.
S2, comparing the calculated first average power value P with set power threshold values TH 1-TH 7 respectively.
S3, when TH6 is smaller than P is smaller than TH7, the gain is overlarge. If the current gain value is greater than or equal to 5dB (i.e., the preset gain range), the new current gain value is reduced by 5dB based on the current gain value, otherwise the new current gain value is assigned 0dB.
S4, when TH5 is smaller than P is smaller than TH6, the gain is proper, and the current gain value is not adjusted.
S5, when TH4 is smaller than P is smaller than TH5, the gain is too small. If the current gain value is less than or equal to 25dB, the new current gain value is increased by 5dB on the basis of the current gain value, otherwise, the new current gain value is assigned to 30dB.
S6, when TH3 is smaller than P is smaller than TH4, the gain is too small. If the current gain value is less than or equal to 20dB, the new current gain value is increased by 10dB on the basis of the current gain value, otherwise, the new current gain value is assigned to 30dB.
S7, when TH2 is smaller than P is smaller than TH3, the gain is too small. If the current gain value is less than or equal to 15dB, the new current gain value is increased by 15dB on the basis of the current gain value, otherwise, the new current gain value is assigned to 30dB.
S8, when TH1 is smaller than P is smaller than TH2, the gain is too small. If the current gain value is less than or equal to 10dB, the new current gain value is increased by 20dB on the basis of the current gain value, otherwise, the new current gain value is assigned to 30dB.
S9, when P is smaller than TH1, the gain is too small. It is possible that the environment is pure noise at this time and the new current gain value is increased by 1dB on the basis of the current gain value.
In an embodiment, fig. 7 is a schematic diagram of adjustment of AGC after terminal access according to an embodiment of the present invention. As shown in fig. 7, with the current statistics period being 3 downlink subframes (i.e. 3D), the preset statistics interval being t0, the number of communication subintervals being n, the actual power values of each communication subinterval being P1, P2, P3, …, pn, respectively.
After the terminal successfully accesses the base station, the gain adjustment should not be too fast, and at least needs to be longer than one OFDM symbol in order to reduce the inter-subcarrier interference and keep the power between symbols in the subframe uniform. In the scheme of the invention, one continuous downlink time slot is taken as a statistical period (3 downlink subframes, 3 ms), a sampling signal in the statistical period is divided into n parts by taking t0 as a length, the actual power values in each communication subinterval are counted as P1, … and Pn, and the maximum value is taken as the initial average power value of the statistical period, namely Pi=max (P1, P2, …, pn-1 and Pn).
In order to avoid transient interference caused by burst noise affecting the AGC adjustment result, the results of the first few statistical periods are added to the calculation using a certain weight, here taking 2 memory terms as an example:
P now ＝a*P i-2 +b*P i-1 +c*P i
wherein a, b, c are the first two statistical periods, the first statistical period, and the current statistical period, respectively Weight value of period, P now For the new current power value (i.e., the target average power value) of the current statistical period calculated according to the weight, the new current power value is used for calculating the communication gain value of the next statistical period.
The calculation formula of the communication gain value of the next statistical period is as follows:
Gain new ＝Gain now +10lg(P th /P now )
wherein, gain now For the communication gain value of the current statistical period, P now For the target average power value, P, of the sampled signal in the current statistical period th Is a preset optimal power threshold value, is a constant value, is Gain new Is the target communication gain value to be solved for the variable gain power amplifier for the next statistical period.
In an embodiment, fig. 8 is a schematic structural diagram of a gain control apparatus according to an embodiment of the present invention. As shown in fig. 8, the apparatus includes: the first determination module 410, the second determination module 420, the third determination module 430, and the fourth determination module 440.
Wherein, the first determining module 410 is configured to determine an initial average power value of the sampled signal in the current statistical period in response to the first communication node successfully accessing the second communication node;
a second determining module 420, configured to determine a target average power value of the sampled signal in the current statistical period based on the target average power value of the sampled signal in the first statistical period, the target average power value of the sampled signal in the second statistical period, and the initial average power value of the sampled signal in the current statistical period, and the weight value of each statistical period;
A third determining module 430, configured to determine a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value;
a fourth determining module 440, configured to take the target communication gain value as the communication gain value of the next statistical period of the variable gain power amplifier.
In an embodiment, the first determining module includes:
the dividing unit is used for dividing the current statistical period according to a preset statistical interval to obtain at least two corresponding communication subintervals;
a first determining unit configured to determine an actual power value of each communication subinterval;
and the second determining unit is used for taking the maximum actual power value in the current statistical period as the initial average power value of the sampling signal in the current statistical period.
In one embodiment, the current statistical period is at least greater than the length of one OFDM symbol.
In an embodiment, the second determining module includes:
a third determining unit, configured to determine a product value between the target average power value of the sampled signal in the first statistical period and the weight value of the corresponding statistical period, and a product value between the target average power value of the sampled signal in the second statistical period and the weight value of the corresponding statistical period, and a product value between the initial average power value of the sampled signal in the current statistical period and the weight value of the corresponding statistical period, respectively;
And a fourth determining unit, configured to determine a target average power value of the sampled signal in the current statistical period according to the added value of the product values.
In an embodiment, the third determining module includes:
a fifth determining unit, configured to determine a ratio of the preconfigured optimal power threshold value to the target average power value as a corresponding first ratio;
and a sixth determining unit, configured to determine a target communication gain value according to the first ratio and the communication gain value of the current statistical period.
The fourth determining module is used for determining an average power value of the target communication signal received in the preset time period as a first average power value;
a fifth determining module, configured to determine a target gain adjustment value according to a comparison result between the first average power value and a preset power range, and a comparison result between a current gain value corresponding to the variable gain power amplifier and the preset gain range;
and the adjusting module is used for automatically adjusting the current gain value of the variable gain power amplifier according to the target gain adjusting value, and returning to the step of determining the average power of the target communication signal received in the preset time period until the first communication node is successfully accessed to the second communication node.
In an embodiment, the gain control apparatus further comprises:
the receiving module is used for receiving the original communication signal sent by the second communication node;
the power amplification module is used for carrying out power amplification on the original communication signal to obtain a corresponding power amplification signal;
and the analog-to-digital conversion module is used for performing analog-to-digital conversion on the power amplification signal to obtain a corresponding target communication signal.
In one embodiment, the fifth determining module includes:
a seventh determining unit, configured to determine a gain adaptation condition according to a comparison result between the first average power value and a preset power range;
and the eighth determining unit is used for determining a target gain adjustment value according to the comparison result between the current gain value corresponding to the variable gain power amplifier and the preset gain range based on the gain adaptation condition.
The gain control device provided by the embodiment of the application can execute the gain control method provided by any embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method.
In an embodiment, fig. 9 is a block diagram of a communication node according to an embodiment of the present application, where, as shown in fig. 9, the communication node provided by the present application includes: a processor 510, a memory 520, and a communication module 530. The number of processors 510 in the device may be one or more, one processor 510 being illustrated in fig. 9. The amount of memory 520 in the device may be one or more, one memory 520 being illustrated in fig. 9. The processor 510, memory 520, and communication module 530 of the device may be connected by a bus or otherwise, for example in fig. 9. In this embodiment, the device is a first communication node. Wherein the first communication node may be a terminal comprising a variable gain power amplifier.
The memory 520 serves as a computer readable storage medium, and may be configured to store a software program, a computer executable program, and modules, such as program instructions/modules (e.g., the first determining module 410, the second determining module 420, and the adjusting module 430 in the gain control apparatus) corresponding to the device according to any embodiment of the present application. Memory 520 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the device, etc. In addition, memory 520 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 520 may further include memory located remotely from processor 510, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
In the case that the communication node is the first communication node, the apparatus provided above may be configured to execute the gain control method applied to the first communication node provided in any of the foregoing embodiments, and have corresponding functions and effects.
The embodiments of the present application also provide a storage medium containing computer executable instructions which, when executed by a computer processor, are adapted to perform a method of gain control for a first communication node, the method comprising: determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node; determining a target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period, the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period; wherein, the first statistical period and the second statistical period are at least one period before the current statistical period; determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value; the target communication gain value is taken as the communication gain value of the next statistical period of the variable gain power amplifier.
It will be appreciated by those skilled in the art that the term user equipment encompasses any suitable type of wireless user equipment, such as mobile telephones, portable data processing devices, portable web browsers, or car-mounted mobile stations.
In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, e.g. in a processor entity, either in hardware, or in a combination of software and hardware. The computer program instructions may be assembly instructions, instruction set architecture (Instruction Set Architecture, ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages.
The block diagrams of any of the logic flows in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), optical Memory devices and systems (digital versatile Disk (Digital Video Disc, DVD) or Compact Disk (CD)), and the like. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general purpose computers, special purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), programmable logic devices (Field-Programmable Gate Array, FGPA), and processors based on a multi-core processor architecture.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (11)
1. A method of gain control applied to a first communication node configured with a variable gain power amplifier, comprising:
determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node;
determining a target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period, the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period; wherein the first statistical period and the second statistical period are each at least one period before the current statistical period;
Determining a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value;
and taking the target communication gain value as the communication gain value of the next statistical period of the variable gain power amplifier.
2. The method of claim 1, wherein determining the initial average power value of the sampled signal for the current statistical period comprises:
dividing the current statistical period according to a preset statistical interval to obtain at least two corresponding communication subintervals;
determining an actual power value of each communication subinterval;
and taking the maximum actual power value in the current statistical period as the initial average power value of the sampling signal in the current statistical period.
3. The method of claim 1, wherein the current statistical period is at least greater than a length of one OFDM symbol.
4. The method of claim 1, wherein the determining the target average power value for the sampled signal in the current statistical period based on the target average power value for the sampled signal in the first statistical period, the target average power value for the sampled signal in the second statistical period, and the initial average power value for the sampled signal in the current statistical period, and the weight value for each statistical period, comprises:
Respectively determining a product value between a target average power value of the sampling signal in the first statistical period and a weight value of the corresponding statistical period, a product value between a target average power value of the sampling signal in the second statistical period and a weight value of the corresponding statistical period, and a product value between an initial average power value of the sampling signal in the current statistical period and a weight value of the corresponding statistical period;
and determining the target average power value of the sampling signal in the current statistical period according to the added value of the product value.
5. The method of claim 1, wherein the determining a target communication gain value based on the communication gain value for the current statistical period, the target average power value, and a pre-configured optimal power threshold value comprises:
determining the ratio of a preconfigured optimal power threshold value to the target average power value as a corresponding first ratio;
and determining a target communication gain value according to the first ratio and the communication gain value of the current statistical period.
6. The method according to any of claims 1-5, further comprising, prior to said determining the initial average power value of the sampled signal over the current statistical period:
Determining an average power value of the received target communication signal in a preset time period as a first average power value;
determining a target gain adjustment value according to a comparison result between the first average power value and a preset power range and a comparison result between a current gain value corresponding to the variable gain power amplifier and the preset gain range;
and automatically adjusting the current gain value of the variable gain power amplifier according to the target gain adjustment value, and returning to the step of determining the average power of the target communication signal received in the preset time period until the first communication node is successfully accessed to the second communication node.
7. The method of claim 6, wherein prior to determining the average power value of the received target communication signal for the predetermined period of time as the first average power value, further comprising:
receiving an original communication signal sent by a second communication node;
carrying out power amplification on the original communication signal to obtain a corresponding power amplification signal;
and carrying out analog-to-digital conversion on the power amplification signal to obtain a corresponding target communication signal.
8. The method of claim 6, wherein the determining the target gain adjustment value according to the comparison between the first average power value and the preset power range and the comparison between the current gain value corresponding to the variable gain power amplifier and the preset gain range comprises:
Determining a gain adaptation condition according to a comparison result between the first average power value and a preset power range;
and determining a target gain adjustment value according to a comparison result between the current gain value corresponding to the variable gain power amplifier and a preset gain range based on the gain adaptation condition.
9. A gain control apparatus for a first communication node configured with a variable gain power amplifier, comprising:
the first determining module is used for determining an initial average power value of the sampling signal in the current statistical period in response to the first communication node successfully accessing the second communication node;
the second determining module is used for determining the target average power value of the sampling signal in the current statistical period based on the target average power value of the sampling signal in the first statistical period, the target average power value of the sampling signal in the second statistical period and the initial average power value of the sampling signal in the current statistical period, and the weight value of each statistical period;
a third determining module, configured to determine a target communication gain value based on the communication gain value of the current statistical period, the target average power value and a preconfigured optimal power threshold value;
And a fourth determining module, configured to take the target communication gain value as a communication gain value of a next statistical period of the variable gain power amplifier.
10. A communication node, the communication node comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the gain control method of any one of claims 1-8.
11. A computer readable storage medium storing computer instructions for causing a processor to implement the gain control method of any one of claims 1-8 when executed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117177334A (en) * | 2023-11-02 | 2023-12-05 | 广州天奕技术股份有限公司 | Terminal communication method and device |
| CN117572757A (en) * | 2023-12-20 | 2024-02-20 | 深圳市科沃电气技术有限公司 | PTC control method, system and device for oversampling power prediction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117177334A (en) * | 2023-11-02 | 2023-12-05 | 广州天奕技术股份有限公司 | Terminal communication method and device |
| CN117177334B (en) * | 2023-11-02 | 2024-01-26 | 广州天奕技术股份有限公司 | Terminal communication method and device |
| CN117572757A (en) * | 2023-12-20 | 2024-02-20 | 深圳市科沃电气技术有限公司 | PTC control method, system and device for oversampling power prediction |
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