CN111355678B - Automatic gain control method, automatic gain control device, storage medium and electronic equipment - Google Patents
Automatic gain control method, automatic gain control device, storage medium and electronic equipment Download PDFInfo
- Publication number
- CN111355678B CN111355678B CN201811584273.XA CN201811584273A CN111355678B CN 111355678 B CN111355678 B CN 111355678B CN 201811584273 A CN201811584273 A CN 201811584273A CN 111355678 B CN111355678 B CN 111355678B
- Authority
- CN
- China
- Prior art keywords
- received signal
- value
- signal strength
- power
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
The present disclosure relates to an automatic gain control method, apparatus, storage medium, and electronic device, including: calculating the power of each subcarrier corresponding to each symbol in a signal received in a preset period according to the preset period; calculating the power sum of subcarriers with reference signals in all subcarriers corresponding to the reference symbols with reference signals in symbols in a preset period, and taking the power sum corresponding to each average reference symbol as a first actual received signal strength indication value; acquiring a target received signal strength indicated value according to a preset network parameter and a preset corresponding relation; and performing automatic gain control according to the difference value between the target received signal strength indicating value and the first actual received signal strength indicating value. Therefore, the actual power of the reference signal in the received signal can be accurately calculated, the actual power is not influenced by the user scheduling factor, and the reflection of the reference signal on the signal environment is not influenced by the automatic gain adjustment.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to an automatic gain control method, apparatus, storage medium, and electronic device.
Background
Reference Signals (RS) can be generally divided into an uplink Reference Signal and a downlink Reference Signal. An important function of the reference signal is to be able to provide reference data for channel quality measurements.
In the field of communications, automatic gain control is a very common processing method in processing signals. At a signal receiving end, the received signal strength can be ensured to be relatively stable and kept within a certain range through automatic gain control. In the process of automatic gain control, usually, RSSI (Received Signal Strength indication) is calculated to determine whether automatic gain control is required and how to perform automatic gain control. For example, if the calculated RSSI for the received signal is less than a preset value, the received signal strength is increased, if the calculated RSSI for the received signal is greater than a preset value, the received signal strength is decreased, and so on.
At present, when calculating the RSSI of a received signal, it is common to use the time domain RSSI, that is, to calculate the RSSI (instantaneous) ═ sum (I ^2+ Q ^2) for each time of sampled signal data, and then average the instantaneous RSSI of n sampled signal data to obtain the average value of the RSSI, that is, the RSSI (average) ═ sum (RSSI (instantaneous))/n. Such a calculation method works well in a pure time division multiplexing communication system, in which if the channel environment is stable, each downlink time slice has constant energy, so the RSSI changes only with two variables, namely distance and channel interference, and thus the time domain RSSI thus calculated can be used as a parameter for channel estimation. In the LTE (4G) wireless communication system, the downlink frame format uses an OFDMA multiplexing method, and energy varies from user to user in each millisecond time slice, so that the time domain RSSI may vary dramatically according to the resource scheduling of the user without distance change or interference. In this way, if the automatic gain adjustment is performed by using the same conventional method for calculating the time domain RSSI as in the pure time division multiplexing communication system, the time domain RSSI is different due to different user schedules, and then the AGC process amplifies or reduces the entire signal according to the change of the RSSI, so that the reference signal also changes. However, the channel environment does not change at this time, and therefore the change of the reference signal does not really represent the estimation of the environment change.
Disclosure of Invention
An object of the present disclosure is to provide an automatic gain control method, apparatus, storage medium, and electronic device, which can accurately calculate the actual power of a reference signal in a received signal without being affected by user scheduling factors.
In order to achieve the above object, the present disclosure provides an automatic gain control method, the method including:
calculating the power of each subcarrier corresponding to each symbol in the signals received in the preset period according to the preset period;
calculating the power sum of subcarriers with reference signals in all subcarriers corresponding to reference symbols with reference signals in the symbols in the preset period, and taking the power sum corresponding to each reference symbol as a first actual received signal strength indication value;
acquiring a target received signal strength indicating value according to a preset network parameter and a preset corresponding relation, wherein the preset network parameter is used for indicating the ratio of the power of a subcarrier without a reference signal to the power of a subcarrier with the reference signal on each symbol with the reference signal in the signal, and the preset corresponding relation is the corresponding relation between the preset network parameter and the target received signal strength indicating value;
and performing automatic gain control according to the difference value between the target received signal strength indicating value and the first actual received signal strength indicating value.
Optionally, the calculating, according to a preset period, the power of each subcarrier corresponding to each symbol in the signal received in the preset period includes:
performing fast Fourier transform on the received signal according to the sequence of the symbols and the bandwidth of the signal according to the preset period to obtain an amplitude value of each subcarrier corresponding to each symbol in the preset period;
and calculating the power of each subcarrier corresponding to each symbol in the preset period according to the amplitude value of each subcarrier.
Optionally, before the step of performing automatic gain control according to the difference between the target received signal strength indicator value and the first actual received signal strength indicator value, the method further includes:
adjusting the first actual received signal strength indicating value according to a ratio between the received signal bandwidth and a system bandwidth to obtain an adjusted second actual received signal strength indicating value, wherein the ratio between the first actual received signal strength indicating value before adjustment and the adjusted second actual received signal strength indicating value is the same as the ratio between the received signal bandwidth and the system bandwidth;
performing automatic gain control based on the difference between the target rssi value and the first actual rssi value further comprises:
and performing automatic gain control according to the difference value of the target received signal strength indication value and the adjusted second actual received signal strength indication value.
Optionally, the target rssi value is a sum of a default dynamic range of received power of the system and a preset extended dynamic range of received power, and the default dynamic range of received power of the system is a dynamic range of received power of the signal calculated according to the preset network parameter.
The present disclosure also provides an automatic gain control apparatus, the apparatus comprising:
the subcarrier power calculation module is used for calculating the power of each subcarrier corresponding to each symbol in the signals received in the preset period according to the preset period;
an actual received signal strength indicating value calculating module, configured to calculate power sums of subcarriers with reference signals in all subcarriers corresponding to reference symbols with reference signals in the symbols in the preset period, and use the power sum corresponding to each average reference symbol as a first actual received signal strength indicating value;
a target received signal strength indicating value obtaining module, configured to obtain a target received signal strength indicating value according to a preset network parameter and a preset corresponding relationship, where the preset network parameter is used to indicate a ratio of power of a subcarrier without a reference signal to power of a subcarrier with the reference signal on each symbol with the reference signal in the signal, and the preset corresponding relationship is a corresponding relationship between the preset network parameter and the target received signal strength indicating value;
and the automatic gain control module is used for carrying out automatic gain control according to the difference value of the target received signal strength indicating value and the first actual received signal strength indicating value.
Optionally, the subcarrier power calculating module includes:
an amplitude value calculation sub-module, configured to perform fast fourier transform on the received signal according to the order of the symbols and according to the bandwidth of the signal in the preset period, so as to obtain an amplitude value of each subcarrier corresponding to each symbol in the preset period;
and the subcarrier power calculation sub-module is used for calculating the power of each subcarrier corresponding to each symbol in the preset period according to the amplitude value of each subcarrier.
Optionally, the apparatus further comprises:
an actual received signal strength indicator value adjusting module, configured to adjust the first actual received signal strength indicator value according to a ratio between a bandwidth of the received signal and a system bandwidth to obtain an adjusted second actual received signal strength indicator value, where a ratio between the first actual received signal strength indicator value before adjustment and the adjusted second actual received signal strength indicator value is the same as a ratio between the bandwidth of the received signal and the system bandwidth;
the automatic gain control module is further configured to:
and performing automatic gain control according to the difference value between the target received signal strength indicating value and the adjusted second actual received signal strength indicating value.
Optionally, the target rssi value is a sum of a default dynamic range of received power of the system and a preset extended dynamic range of received power, and the default dynamic range of received power of the system is a dynamic range of received power of the signal calculated according to the preset network parameter.
The present disclosure also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method described above.
The present disclosure also provides an electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method described above.
According to the technical scheme, the power of each subcarrier corresponding to each symbol in the received signal in the preset period is calculated according to the preset period, then the power sum corresponding to the subcarrier with the reference signal in each reference symbol in the preset period is calculated to obtain the actual received signal strength indicated value corresponding to the signal in the preset period, and automatic gain control is carried out according to the difference value of the actual received signal strength indicated value and the preset target received signal strength indicated value determined according to the specified network parameters. Therefore, the actual received signal strength indicated value on the frequency domain is calculated, and the power of the subcarrier related to the user scheduling is not considered when the actual received signal strength indicated value is calculated, so that the actual power of the reference signal in the received signal can be accurately calculated by performing automatic gain control according to the actual received signal strength indicated value obtained by calculation, the intensity of the received signal cannot be excessively adjusted under the influence of the user scheduling factor, the intensity of the reference signal in the signal cannot be excessively influenced, and the received reference signal can better reflect the channel environment.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a flow chart illustrating an automatic gain control method according to an exemplary embodiment of the present disclosure.
Fig. 2 is a schematic diagram illustrating a structure of a signal in time and frequency domains according to an exemplary embodiment of the present disclosure.
Fig. 3 is a flowchart illustrating yet another automatic gain control method according to an exemplary embodiment of the present disclosure.
Fig. 4 is a flowchart illustrating yet another automatic gain control method according to an exemplary embodiment of the present disclosure.
Fig. 5 is a block diagram illustrating an automatic gain control apparatus according to an exemplary embodiment of the present disclosure.
Fig. 6 is a block diagram illustrating a structure of a subcarrier power calculation module in an automatic gain control apparatus according to an exemplary embodiment of the present disclosure.
Fig. 7 is a block diagram illustrating a structure of still another automatic gain control apparatus according to an exemplary embodiment of the present disclosure.
FIG. 8 is a block diagram illustrating an electronic device in accordance with an example embodiment.
FIG. 9 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flow chart illustrating an automatic gain control method according to an exemplary embodiment of the present disclosure. As shown in fig. 1, the method includes steps 101 to 104.
In step 101, the power of each subcarrier corresponding to each symbol in the signal received in the preset period is calculated according to the preset period. The preset period may be, for example, a time length of one subframe. That is, each time a subframe signal is received, the power of each subcarrier in the frequency domain corresponding to each symbol (symbol) in the time domain in the received signal in the subframe is calculated.
In step 102, the power sum of the subcarriers with reference signals in all the subcarriers corresponding to the reference symbols with reference signals in the symbols in the preset period is calculated, and the power sum corresponding to each reference symbol is averaged to be used as the first actual received signal strength indication value.
As shown in fig. 2, in one subframe (subframe 0 or subframe 1), two slots (slot 0 and slot 1) are included in the time domain, and each slot may include 7 symbols (symbol) or 6 symbols (symbol), which are divided according to whether it is in the case of normal cp (normal Cyclic prefix) or extended cp (extended Cyclic prefix), and fig. 2 shows the case of 7 symbols (symbol 0-6); the frequency domain is generally divided into a plurality of subcarriers according to the bandwidth of the signal, and the number of the subcarriers is related to the bandwidth; one RE (resource element) is a symbol in the time domain and one subcarrier in the frequency domain, the Reference Signal discretely appears in the Signal in a unit of one RE, as shown in fig. 2, the RE marked in black is a Reference Signal (RS), and the symbol with the Reference Signal is called a Reference symbol. Taking the preset period as one subframe as an example, the power sum of the subcarriers with the reference signals in the reference symbols in step 102 may be the power sum of all the REs marked with black in 14 symbols in the subframe 0 shown in fig. 2, the number of the subcarriers shown in fig. 2 is only illustrated, and the actual number of the subcarriers is determined according to the bandwidth of the actual signal, so that the number of the REs marked with black in the 14 symbols in the subframe 0 is actually greater than the number shown in fig. 2.
After calculating and obtaining the power sum of the subcarriers with the reference signals in all the subcarriers corresponding to all the reference symbols with the reference signals in a preset period, averaging the power sum according to the number of the reference symbols in the preset period to obtain the power sum corresponding to each reference symbol in the preset period, wherein the power sum corresponding to each reference symbol is the required first actual Received Signal Strength Indication (RSSI).
In step 103, a target received signal strength indication value (target RSSI) is obtained according to a preset network parameter and a preset corresponding relationship, where the preset network parameter is used to indicate a ratio of power of a subcarrier without a reference signal to power of a subcarrier with a reference signal on each symbol with a reference signal in the signal, and the preset corresponding relationship is a corresponding relationship between the preset network parameter and the target RSSI. The preset indication network parameter may be ρ B, which is preset before network communication starts, and is used to specify a ratio of power of a subcarrier without a reference signal to power of a subcarrier with a reference signal on each symbol with a reference signal in the signal in a communication process, and according to the ρ B configuration value and a preset corresponding relationship, a preset target received signal strength indication value can be found and obtained.
In one possible implementation, the target rssi value is a sum of the system default rx power dynamic range and a preset extended power dynamic range. And the default received power dynamic range of the system is the dynamic range of the received power of the signal, which is obtained by calculation according to the preset network parameters. Dynamic range is the ratio of the maximum and minimum values of the variable signal, which may be in dB. That is, the dynamic range of the default received Power of the system when there is no user scheduling or full user scheduling can be obtained from the preset network parameter (for example, ρ B), and the preset extended dynamic range may be any set value, and for example, the preset extended dynamic range may be determined from a dynamic range of 12dB required when the number of PAPR-Peak to Average Power Ratio (PAPR-Peak to Average Power Ratio) in OFDM (Orthogonal Frequency Division Multiplexing) is greater than 512. Several possible values for the target received signal strength indicator value are given in table 1 below:
the preset corresponding relationship may be a corresponding relationship between ρ B and the target received signal gun intensity indicated value as shown in table 1, and a value of the target received signal intensity indicated value corresponding to the preset network parameter can be found and obtained according to the obtained preset network parameter ρ B and the corresponding relationship.
TABLE 1
In step 104, automatic gain control is performed according to the difference between the target rssi value and the first actual rssi value. After the target rssi value is obtained, the target rssi value is compared with the first actual rssi value, and Automatic Gain Control (AGC) is performed based on the difference between the target rssi value and the first actual rssi value.
According to the technical scheme, the power of each subcarrier corresponding to each symbol in the received signal in the preset period is calculated according to the preset period, then the power sum corresponding to the subcarrier with the reference signal in each reference symbol in the preset period is calculated to obtain the actual received signal strength indicated value corresponding to the signal in the preset period, and automatic gain control is carried out according to the difference value of the actual received signal strength indicated value and the preset target received signal strength indicated value determined according to the specified network parameters. Therefore, the actual received signal strength indicated value on the frequency domain is calculated, and the power of the subcarrier related to the user scheduling is not considered when the actual received signal strength indicated value is calculated, so that the actual power of the reference signal in the received signal can be accurately calculated by performing automatic gain control according to the actual received signal strength indicated value obtained by calculation, the intensity of the received signal cannot be excessively adjusted under the influence of the user scheduling factor, the intensity of the reference signal in the signal cannot be excessively influenced, and the received reference signal can better reflect the channel environment.
Fig. 3 is a flowchart illustrating yet another automatic gain control method according to an exemplary embodiment of the present disclosure. As shown in fig. 3, step 101 shown in fig. 1 may include steps 301 and 302 as shown in fig. 3.
In step 301, according to the preset period, performing fast fourier transform on the received signal according to the order of the symbols and according to the bandwidth of the signal, so as to obtain an amplitude value of each subcarrier corresponding to each symbol in the preset period. The received time domain signal may be transformed to a frequency domain signal by Fast Fourier Transform (FFT).
In step 302, according to the amplitude value of each of the subcarriers, the power of each of the subcarriers corresponding to each of the symbols in the preset period is calculated. After obtaining the amplitude value of each of the sub-carriers, the power of each of the sub-carriers can be obtained by calculating the square of the amplitude value.
Fig. 4 is a flowchart illustrating yet another automatic gain control method according to an exemplary embodiment of the present disclosure. As shown in fig. 4, the method includes steps 401 and 402 in addition to steps 101 to 103 shown in fig. 1.
In step 401, the first actual rssi value is adjusted according to a ratio between a bandwidth of the received signal and a system bandwidth to obtain an adjusted second actual rssi value, where a ratio between the first actual rssi value before adjustment and the adjusted second actual rssi value is the same as a ratio between the bandwidth of the received signal and the system bandwidth. In general, the received signal bandwidth is the same as the system bandwidth, but in some special cases, the system will require the received signal to be smaller than the system bandwidth. For example, the current system bandwidth is 20M, the received signal is usually 20M, but there may be a subframe where data needs to be received suddenly according to a bandwidth of 10M, and since the first actual received signal strength indication value calculated by the frequency domain signal is related to the bandwidth, the reduction of the bandwidth also reduces the first actual received signal strength indication value calculated by the subframe, and the environment of the channel is not changed at this time, in order to ensure the stability of the automatic gain control, when the received signal bandwidth is smaller than the system bandwidth, the first actual received signal strength indication value calculated needs to be compensated, so that the power of the reference signal of the incoming system is kept consistent with the power of the reference signal of the incoming system at the original bandwidth. The compensation method is to compensate the first actual rssi value according to the degree of bandwidth reduction, for example, when the system bandwidth is 20M and the bandwidth of the received signal is 10M, the system bandwidth is twice the bandwidth of the received signal, so that the calculated first actual rssi value is also doubled at this time, and the adjusted second actual rssi value is obtained.
In step S402, an automatic gain control is performed according to a difference between the target rssi value and the adjusted second actual rssi value. And when the automatic gain adjustment is finally carried out, the second actual received signal strength indicating value after the adjustment after the compensation is used for being compared with the target received signal strength indicating value.
By the technical scheme, when the bandwidth of the received signal is adjusted, the power of the reference signal entering the system can be ensured not to be influenced, and the reflection of the reference signal on the signal environment cannot be influenced due to the automatic gain control.
Fig. 5 is a block diagram illustrating an automatic gain control apparatus according to an exemplary embodiment of the present disclosure. As shown in fig. 5, the apparatus includes: a subcarrier power calculating module 10, configured to calculate, according to a preset period, power of each subcarrier corresponding to each symbol in a signal received in the preset period; an actual received signal strength indicator value calculating module 20, configured to calculate a power sum of subcarriers with reference signals in all subcarriers corresponding to reference symbols with reference signals in the symbols in the preset period, and use the power sum corresponding to each average reference symbol as a first actual received signal strength indicator value; a target received signal strength indication value obtaining module 30, configured to obtain a target received signal strength indication value according to a preset network parameter and a preset corresponding relationship, where the preset network parameter is used to indicate a ratio of power of a subcarrier without a reference signal to power of a subcarrier with a reference signal on each symbol with a reference signal in the signal, and the preset corresponding relationship is a corresponding relationship between the preset network parameter and the target received signal strength indication value; an automatic gain control module 40, configured to perform automatic gain control according to a difference between the target rssi value and the first actual rssi value.
According to the technical scheme, the power of each subcarrier corresponding to each symbol in the received signal in the preset period is calculated according to the preset period, then the power sum corresponding to the subcarrier with the reference signal in each reference symbol in the preset period is calculated to obtain the actual received signal strength indicated value corresponding to the signal in the preset period, and automatic gain control is carried out according to the difference value of the actual received signal strength indicated value and the preset target received signal strength indicated value determined according to the specified network parameters. Therefore, the actual power of the reference signal in the received signal can be accurately calculated by performing automatic gain control according to the actual received signal strength indicating value obtained by calculation, the strength of the received signal cannot be excessively adjusted due to the influence of the user scheduling factor, and the strength of the reference signal in the signal cannot be excessively influenced, so that the received reference signal can better reflect the channel environment.
Fig. 6 is a block diagram illustrating a structure of a subcarrier power calculation module in an automatic gain control apparatus according to an exemplary embodiment of the present disclosure. As shown in fig. 6, the subcarrier power calculation module 10 includes: an amplitude value calculation sub-module 101, configured to perform, according to the preset period, fast fourier transform on the received signal according to the sequence of the symbols and according to the bandwidth of the signal, so as to obtain an amplitude value of each subcarrier corresponding to each symbol in the preset period; the subcarrier power calculation sub-module 102 is configured to calculate, according to the amplitude value of each subcarrier, the power of each subcarrier corresponding to each symbol in the preset period.
Fig. 7 is a block diagram illustrating a structure of still another automatic gain control apparatus according to an exemplary embodiment of the present disclosure. As shown in fig. 7, the apparatus further includes: an actual received signal strength indication value adjusting module 50, configured to adjust the first actual received signal strength indication value according to a ratio between a bandwidth of the received signal and a system bandwidth to obtain an adjusted second actual received signal strength indication value, where a ratio between the first actual received signal strength indication value before adjustment and the adjusted second actual received signal strength indication value is the same as a ratio between the bandwidth of the received signal and the system bandwidth; the automatic gain control module 40 is further configured to: and performing automatic gain control according to the difference value between the target received signal strength indicating value and the adjusted second actual received signal strength indicating value.
In a possible implementation manner, the target rssi value is a sum of the system default received power dynamic range and a preset extended power dynamic range, and the system default received power dynamic range is a dynamic range of the power of the received signal calculated according to the preset network parameter.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 8 is a block diagram illustrating an electronic device 800 in accordance with an example embodiment. As shown in fig. 8, the electronic device 800 may include: a processor 801, a memory 802. The electronic device 800 may also include one or more of a multimedia component 803, an input/output (I/O) interface 804, and a communications component 805.
The processor 801 is configured to control the overall operation of the electronic device 800, so as to complete all or part of the steps in the automatic gain control method. The memory 802 is used to store various types of data to support operation at the electronic device 800, such as instructions for any application or method operating on the electronic device 800 and application-related data, such as contact data, transmitted and received messages, pictures, audio, video, and so forth. The Memory 802 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia components 803 may include screen and audio components. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 802 or transmitted through the communication component 805. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 804 provides an interface between the processor 801 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 808 can thus include: Wi-Fi module, Bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic Device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the automatic gain control method described above.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the automatic gain control method described above is also provided. For example, the computer readable storage medium may be the memory 802 described above that includes program instructions executable by the processor 801 of the electronic device 800 to perform the automatic gain control method described above.
Fig. 9 is a block diagram illustrating an electronic device 900 in accordance with an example embodiment. For example, the electronic device 900 may be provided as a server. Referring to fig. 9, the electronic device 900 includes a processor 922, which may be one or more in number, and a memory 932 for storing computer programs executable by the processor 922. The computer programs stored in the memory 932 may include one or more modules that each correspond to a set of instructions. Further, the processor 922 may be configured to execute the computer program to perform the automatic gain control method described above.
Additionally, the electronic device 900 may also include a power component 926 and a communication component 950, the power component 926 may be configured to perform power management of the electronic device 900, and the communication component 950 may be configured to enable communication, e.g., wired or wireless communication, of the electronic device 900. The electronic device 900 may also include input/output (I/O) interfaces 958. The electronic device 900 may operate based on an operating system stored in the memory 932, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, and the like.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the automatic gain control method described above is also provided. For example, the computer readable storage medium may be the memory 932 described above including program instructions that are executable by the processor 922 of the electronic device 900 to perform the automatic gain control method described above.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. To avoid unnecessary repetition, the disclosure does not separately describe various possible combinations.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.
Claims (10)
1. A method for automatic gain control, the method comprising:
calculating the power of each subcarrier corresponding to each symbol in the signals received in the preset period according to the preset period;
calculating the power sum of subcarriers with reference signals in all subcarriers corresponding to reference symbols with reference signals in the symbols in the preset period, and taking the power sum corresponding to each reference symbol as a first actual received signal strength indication value;
acquiring a target received signal strength indicating value according to a preset network parameter and a preset corresponding relation, wherein the preset network parameter is used for indicating the ratio of the power of a subcarrier without a reference signal to the power of a subcarrier with the reference signal on each symbol with the reference signal in the signal, and the preset corresponding relation is the corresponding relation between the preset network parameter and the target received signal strength indicating value;
and performing automatic gain control according to the difference value between the target received signal strength indicating value and the first actual received signal strength indicating value.
2. The method according to claim 1, wherein said calculating, according to a preset period, the power of each subcarrier corresponding to each symbol in the signal received in the preset period comprises:
performing fast Fourier transform on the received signal according to the sequence of the symbols and the bandwidth of the signal according to the preset period to obtain an amplitude value of each subcarrier corresponding to each symbol in the preset period;
and calculating the power of each subcarrier corresponding to each symbol in the preset period according to the amplitude value of each subcarrier.
3. The method of claim 1, wherein prior to the step of performing automatic gain control based on the difference between the target received signal strength indicator value and the first actual received signal strength indicator value, the method further comprises:
adjusting the first actual received signal strength indicating value according to a ratio between the received signal bandwidth and a system bandwidth to obtain an adjusted second actual received signal strength indicating value, wherein the ratio between the first actual received signal strength indicating value before adjustment and the adjusted second actual received signal strength indicating value is the same as the ratio between the received signal bandwidth and the system bandwidth;
the performing automatic gain control according to the difference between the target rssi value and the first actual rssi value further comprises:
and performing automatic gain control according to the difference value of the target received signal strength indication value and the adjusted second actual received signal strength indication value.
4. The method of claim 1, wherein the target RSSI value is a sum of a system default received power dynamic range and a preset extended power dynamic range, and wherein the system default received power dynamic range is a dynamic range of received signal power calculated according to the preset network parameters.
5. An automatic gain control apparatus, comprising:
the subcarrier power calculation module is used for calculating the power of each subcarrier corresponding to each symbol in the signals received in the preset period according to the preset period;
an actual received signal strength indication value calculation module, configured to calculate power sums of subcarriers with reference signals in all subcarriers corresponding to reference symbols with reference signals in the symbols in the preset period, and use the power sum corresponding to each average reference symbol as a first actual received signal strength indication value;
a target received signal strength indicating value obtaining module, configured to obtain a target received signal strength indicating value according to a preset network parameter and a preset corresponding relationship, where the preset network parameter is used to indicate a ratio of power of a subcarrier without a reference signal to power of a subcarrier with the reference signal on each symbol with the reference signal in the signal, and the preset corresponding relationship is a corresponding relationship between the preset network parameter and the target received signal strength indicating value;
and the automatic gain control module is used for carrying out automatic gain control according to the difference value of the target received signal strength indicating value and the first actual received signal strength indicating value.
6. The apparatus of claim 5, wherein the subcarrier power calculation module comprises:
an amplitude value calculation sub-module, configured to perform fast fourier transform on the received signal according to the order of the symbols and according to the bandwidth of the signal in the preset period, so as to obtain an amplitude value of each subcarrier corresponding to each symbol in the preset period;
and the subcarrier power calculation sub-module is used for calculating the power of each subcarrier corresponding to each symbol in the preset period according to the amplitude value of each subcarrier.
7. The apparatus of claim 5, further comprising:
an actual received signal strength indicator value adjusting module, configured to adjust the first actual received signal strength indicator value according to a ratio between a bandwidth of the received signal and a system bandwidth to obtain an adjusted second actual received signal strength indicator value, where a ratio between the first actual received signal strength indicator value before adjustment and the adjusted second actual received signal strength indicator value is the same as a ratio between the bandwidth of the received signal and the system bandwidth;
the automatic gain control module is further configured to:
and performing automatic gain control according to the difference value between the target received signal strength indicating value and the adjusted second actual received signal strength indicating value.
8. The apparatus of claim 5, wherein the target RSSI value is a sum of a system default received power dynamic range and a preset extended power dynamic range, and wherein the system default received power dynamic range is a dynamic range of received signal power calculated according to the preset network parameters.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584273.XA CN111355678B (en) | 2018-12-24 | 2018-12-24 | Automatic gain control method, automatic gain control device, storage medium and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584273.XA CN111355678B (en) | 2018-12-24 | 2018-12-24 | Automatic gain control method, automatic gain control device, storage medium and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111355678A CN111355678A (en) | 2020-06-30 |
| CN111355678B true CN111355678B (en) | 2022-05-20 |
Family
ID=71195571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811584273.XA Active CN111355678B (en) | 2018-12-24 | 2018-12-24 | Automatic gain control method, automatic gain control device, storage medium and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111355678B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112135341B (en) * | 2020-09-22 | 2023-02-10 | 紫光展锐(重庆)科技有限公司 | Gain parameter adjusting method, device and equipment |
| CN112235227B (en) * | 2020-10-16 | 2023-04-07 | 紫光展锐(重庆)科技有限公司 | Method, device and equipment for determining receiving gain and storage medium |
| CN112996096B (en) * | 2021-02-08 | 2023-06-20 | 展讯通信（上海）有限公司 | Automatic gain control method, device, chip and equipment |
| CN115580516A (en) * | 2021-06-21 | 2023-01-06 | 中兴通讯股份有限公司 | Signal processing method, receiving end, transmitting end and storage medium |
| CN114554583B (en) * | 2022-04-01 | 2024-06-07 | 上海星思半导体有限责任公司 | Signal power adjustment method and device and electronic equipment |
| CN115278846A (en) * | 2022-06-29 | 2022-11-01 | 展讯半导体(成都)有限公司 | Bluetooth power control method, device and equipment |
| CN115941411B (en) * | 2022-07-04 | 2023-07-28 | 上海星思半导体有限责任公司 | Signal processing method, device, electronic equipment and storage medium |
| CN117440490B (en) * | 2023-12-20 | 2024-03-12 | 四川恒湾科技有限公司 | Method and system for adaptively adjusting downlink power of O-RU |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377718A (en) * | 2010-08-20 | 2012-03-14 | 联芯科技有限公司 | Automatic gain control method and device |
| CN102656806A (en) * | 2009-01-07 | 2012-09-05 | 天工方案公司 | Circuits, systems, and methods for managing automatic gain control in quadrature signal paths of a receiver |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7151759B1 (en) * | 2001-03-19 | 2006-12-19 | Cisco Systems Wireless Networking (Australia) Pty Limited | Automatic gain control and low power start-of-packet detection for a wireless LAN receiver |
| US20110140778A1 (en) * | 2009-12-15 | 2011-06-16 | Electronics And Telecommunications Research Institute | Automatic gain control method and apparatus |
-
2018
- 2018-12-24 CN CN201811584273.XA patent/CN111355678B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102656806A (en) * | 2009-01-07 | 2012-09-05 | 天工方案公司 | Circuits, systems, and methods for managing automatic gain control in quadrature signal paths of a receiver |
| CN102377718A (en) * | 2010-08-20 | 2012-03-14 | 联芯科技有限公司 | Automatic gain control method and device |
Non-Patent Citations (2)
| Title |
|---|
| "宽带跳频接收机";白灵;《中国优秀硕士学位论文全文数据库》;20130715;全文 * |
| R1-143123 "Discovery RSSI definition for discovery signal based RSRQ";Sharp;《3GPP tsg_ran\WG1_RL1》;20140808;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111355678A (en) | 2020-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111355678B (en) | Automatic gain control method, automatic gain control device, storage medium and electronic equipment | |
| JP7028899B2 (en) | Transmission power determination method, processing chip, and communication device | |
| RU2735333C1 (en) | Method, terminal device and network device for transmitting signals | |
| US10341961B2 (en) | Power control framework for multi-beam configuration | |
| KR101227469B1 (en) | Joint time-frequency automatic gain control for wireless communication | |
| EP3249968A1 (en) | Base station, mobile station, wireless communications system, and wireless communications method | |
| CN111628949B (en) | Frequency offset estimation method and device, storage medium and computer equipment | |
| CN112135341A (en) | Gain parameter adjusting method, device and equipment | |
| JP5765120B2 (en) | Wireless communication terminal and automatic gain control method | |
| WO2020010905A1 (en) | Method and receiver device for channel estimation of broadcast channel | |
| US9749171B2 (en) | Communication receiving end and auto gain control method thereof | |
| US9900141B2 (en) | Method and apparatus for SNR estimation apparatus in OFDM systems | |
| CN102413543A (en) | Initial AGC (automatic gain control) method and equipment of LTE (long term evolution) system | |
| CN111107032A (en) | Reference signal generation method, terminal equipment and network side equipment | |
| CN111698180B (en) | Channel estimation method, signal equalization method, apparatus, medium, and device | |
| CN106254001B (en) | A kind of SRS signal channel quality measuring method and device | |
| JP5268826B2 (en) | Signal quality estimation apparatus, signal quality estimation method, and computer program | |
| CN108259396B (en) | Method, apparatus and storage medium for parameter estimation | |
| CN109699077B (en) | Special subframe transmission method and device in TDD system | |
| CN117527497B (en) | Frequency offset calibration method, device, electronic equipment and storage medium | |
| US12063614B2 (en) | Method and apparatus for estimating and compensating timing advance | |
| KR20140077676A (en) | Apparatus for estimating channel of frequency-domain | |
| CN113381961B (en) | Method and device for configuring and determining phase tracking reference signal, storage medium, base station and user equipment | |
| WO2018145467A1 (en) | Pilot processing method and device | |
| EP3048842B1 (en) | Sending method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 100085 unit C, building C, lin66, Zhufang Road, Qinghe, Haidian District, Beijing Applicant after: Beijing Xiaomi pinecone Electronic Co., Ltd Address before: 100085 Beijing city Haidian District Qinghe Shun Yip things Park Building 3 unit A Applicant before: BEIJING PINECONE ELECTRONICS Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |