WO2021027609A1 - 增益控制方法和装置 - Google Patents

增益控制方法和装置 Download PDF

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Publication number
WO2021027609A1
WO2021027609A1 PCT/CN2020/106627 CN2020106627W WO2021027609A1 WO 2021027609 A1 WO2021027609 A1 WO 2021027609A1 CN 2020106627 W CN2020106627 W CN 2020106627W WO 2021027609 A1 WO2021027609 A1 WO 2021027609A1
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WIPO (PCT)
Prior art keywords
pss
gain
power
downlink
input
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PCT/CN2020/106627
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English (en)
French (fr)
Inventor
朱露敏
洪杭迪
王文元
胡俊英
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三维通信股份有限公司
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Application filed by 三维通信股份有限公司 filed Critical 三维通信股份有限公司
Priority to AU2020330180A priority Critical patent/AU2020330180B2/en
Priority to EP20852073.4A priority patent/EP3944522A4/en
Priority to CA3137405A priority patent/CA3137405A1/en
Priority to US17/603,944 priority patent/US11863218B2/en
Publication of WO2021027609A1 publication Critical patent/WO2021027609A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/001—Digital control of analog signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3078—Circuits generating control signals for digitally modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1607—Supply circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
    • H04B10/2942—Signal power control in a multiwavelength system, e.g. gain equalisation using automatic gain control [AGC]
    • 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
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G2201/00—Indexing scheme relating to subclass H03G
    • H03G2201/10—Gain control characterised by the type of controlled element
    • H03G2201/106—Gain control characterised by the type of controlled element being attenuating element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G2201/00—Indexing scheme relating to subclass H03G
    • H03G2201/20—Gain control characterized by the position of the detection
    • H03G2201/204—Gain control characterized by the position of the detection being in intermediate frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G2201/00—Indexing scheme relating to subclass H03G
    • H03G2201/30—Gain control characterized by the type of controlled signal
    • H03G2201/305—Gain control characterized by the type of controlled signal being intermediate frequency signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control

Definitions

  • This application relates to the field of network communication technology, in particular to a gain control method and device.
  • Digital optical fiber repeater is a repeater that uses optical fiber for signal transmission.
  • the use of optical fiber has low transmission loss.
  • Convenient wiring suitable for long-distance transmission, can solve the problem of not receiving base station signals in villages, towns, tourist areas, highways, etc., and can solve the problem of signal coverage in large and super large buildings. It is used for large and large buildings with higher requirements. High-rise area buildings (groups), communities and other occasions.
  • the level of the input signal of the digital optical fiber repeater is greatly affected by the number of users in the existing network, especially in peak applications, where the automatic level control function frequently switches, which is not conducive to the base station signal Processing.
  • the downlink and uplink gains are independent. If the uplink and downlink gains do not match, it will also affect the base station signal processing.
  • a gain control method is provided, which is applied to a system requiring gain adjustment, the system requiring gain adjustment at least includes an automatic gain controller, and the method includes:
  • the automatic gain controller is controlled to adjust the gain attenuation value according to the magnitude of the PSS input power and the downlink PSS rated power, and the gain attenuation value is used to adjust the uplink gain and the downlink gain.
  • the downlink PSS rated power is used as the gain control threshold of the automatic gain controller, and the relationship between the input PSS input power and the downlink PSS rated power is detected to control the level of the uplink and downlink input signals, and further control the uplink Channel gain and downlink gain.
  • the method can prevent frequent switching of signal levels, and can simultaneously control the downlink gain and the uplink gain in a synchronous manner, and avoid interference with the base station due to excessive uplink noise.
  • the controlling the automatic gain controller to adjust the gain attenuation value according to the PSS input power and the downstream PSS rated power includes:
  • the automatic gain controller is controlled to adjust the gain attenuation value according to the difference between the downlink PSS rated power and the PSS input power within a preset time.
  • the controlling the automatic gain controller to adjust the gain attenuation value according to the difference between the downstream PSS rated power and the PSS input power within a preset time includes:
  • the controlling the automatic gain controller to reduce the gain attenuation value includes:
  • the method further includes: stopping adjusting the gain attenuation value when it is detected that the gain attenuation value is equal to zero.
  • the method further includes: controlling the automatic gain controller to maintain the current gain attenuation value unchanged when the power difference value is always lower than the power threshold value within the preset time.
  • a gain control device which is applied to a system requiring gain adjustment, the system requiring gain adjustment at least includes an automatic gain controller, and the device includes:
  • the detection module is used to detect the input power of the main synchronization signal PSS in the input signal in real time;
  • An obtaining module configured to obtain the downlink PSS rated power as the gain control threshold of the automatic gain controller
  • the control module is used to control the automatic gain controller to adjust the gain attenuation value according to the size of the PSS input power and the downlink PSS rated power, and the gain attenuation value is used to perform uplink gain and downlink gain. Adjustment.
  • control module is further configured to, when the PSS input power is greater than the downstream PSS rated power, control the automatic gain controller to increase the gain attenuation value until the adjustment is detected
  • control the automatic gain controller to increase the gain attenuation value until the adjustment is detected
  • the PSS input power is lower than the input downlink PSS rated power
  • the PSS input power is less than or equal to the downlink PSS rated power
  • the automatic gain controller is controlled to reduce the gain attenuation value.
  • FIG. 1 is a schematic diagram of an application environment of a gain control method according to an embodiment of the present application
  • Fig. 2 is a flowchart of a gain control method according to an embodiment of the present application
  • FIG. 3 is a flowchart of controlling the automatic gain controller to adjust the gain attenuation value according to the magnitude of the PSS input power and the downstream PSS rated power according to an embodiment of the present application;
  • FIG. 4 is a flow chart of controlling the automatic gain controller to adjust the gain attenuation value according to the difference between the downstream PSS rated power and the PSS input power within a preset time according to an embodiment of the present application;
  • Fig. 5 is a structural block diagram of a gain control device according to an embodiment of the present application.
  • Fig. 1 is a schematic diagram of an application environment of a gain control method in an embodiment.
  • the application environment includes, but is not limited to, repeaters, distributed antenna systems (DAS) and other systems that require gain adjustment.
  • DAS distributed antenna systems
  • the following takes a digital optical fiber repeater as an example.
  • the digital optical fiber repeater 10 includes a near end
  • the remote machine 110 and the remote machine 120 can be cascaded with multiple remote machines 120 under one near-end machine 110.
  • the downlink transmission principle of the digital optical fiber repeater 10 is as follows: the downlink signal is coupled from the base station to the near-end machine 110 through a coupler, and the near-end machine 110 uses an antenna to receive the downlink signal, and converts the downlink signal into an intermediate frequency signal through down-conversion ;
  • the intermediate frequency signal is applied to the gain attenuation module through the gain attenuation value fed back by the automatic gain controller after the gain adjustment is sent to the analog-to-digital converter AD, and the intermediate frequency signal after gain adjustment is sampled by the analog-digital converter AD and converted into a digital signal;
  • the digital signal is processed by the baseband signal, packaged and transmitted to the optical fiber transceiver, and transmitted to the remote machine 120 through the optical fiber.
  • the remote unit 120 receives the digital signal of the near-end unit 110 through a fiber optic transceiver. After baseband processing, the digital signal is converted into an analog signal by a digital-to-analog converter DA. The analog signal passes through the antenna after being up-converted and processed by a power amplifier. Send it out.
  • the transmission principle of the uplink corresponds to the transmission principle of the downlink, and will not be repeated here.
  • the system that requires gain adjustment detects the input power of the primary synchronization signal (PSS) in the input signal in real time; obtains the downstream PSS rated power as the gain control threshold of the automatic gain controller; according to the PSS input
  • the size of the power and downlink PSS rated power controls the automatic gain controller to adjust the gain attenuation value, which is used to adjust the uplink gain and downlink gain.
  • the solution provided in this application can control the level of the input signal by detecting the relationship between the input PSS input power and the downstream PSS rated power, avoiding frequent switching of the automatic level control function during application peaks, and simultaneously controlling the downlink Channel gain and uplink gain to avoid interference to the base station with too high uplink noise floor.
  • Fig. 2 is a flowchart of a gain control method in an embodiment.
  • This application provides a gain control method.
  • the system requiring gain adjustment at least includes an automatic gain controller.
  • the gain control method includes step 202 to step 206.
  • Step 201 Detect the input power of the main synchronization signal PSS in the input signal in real time
  • the input signal of the system that requires gain adjustment includes the main synchronization signal PSS, and the real-time PSS input power is obtained by real-time detection of the PSS in the input signal.
  • PSS main synchronization signal
  • PCI is composed of PSS+3*SSS
  • the PSS master synchronization signal occupies 6 RBs of the system bandwidth in the frequency domain, that is 72sc, which is used to indicate the ID in a physical-layer group (Physical-layer) including: 0, 1, 2 ( 3).
  • Step 202 Obtain the downstream PSS rated power as the gain control threshold of the automatic gain controller
  • an automatic gain control uses an effective combination of linear amplification and compression amplification to adjust the level of the uplink and downlink input signals of the system that requires gain adjustment.
  • the downlink PSS rated power of the AGC is compared with the input signal information. If the input signal information (power or voltage amplitude) does not match the downlink PSS rated power, the external attenuator is controlled to increase or decrease the gain attenuation value for the uplink And adjust the level of the downlink input signal.
  • Downlink PSS refers to the primary synchronization signal PSS in the downlink data.
  • the communication parameters of the base station are obtained, and the rated power of the downlink PSS can be calculated according to the communication parameters of the base station.
  • the rated power of the downlink PSS is used as the rated power of the downlink PSS of the AGC.
  • Step 203 Control the automatic gain controller to adjust the gain attenuation value according to the magnitude of the PSS input power and the downlink PSS rated power, and the gain attenuation value is used to adjust the uplink gain and the downlink gain.
  • the rated power of the downlink PSS is calculated according to the communication parameters of the base station, and the rated power of the downlink PSS is used as the rated power of the downlink PSS of the AGC.
  • the automatic gain controller adjusts the gain attenuation value to control the uplink and downlink gains of the system requiring gain adjustment.
  • Using the gain attenuation value to adjust the level of the downstream input signal and the upstream input signal can be achieved by controlling the gain device of the near-end machine and the far-end machine to adjust the gain attenuation value.
  • the gain attenuation value is used to adjust the level of the input signal of the downlink to realize the gain adjustment of the downlink.
  • the gain attenuation value corresponding to the near-end unit is synchronously transmitted to the far-end unit, and the gain attenuation value can also control the level of the uplink input signal of the remote unit to adjust the gain of the uplink, that is, the gain attenuation value It can control the downlink gain and uplink gain in the system synchronously.
  • the above-mentioned gain control method detects the input power of the main synchronization signal PSS in the input signal in real time; obtains the downstream PSS rated power as the gain control threshold of the automatic gain controller; according to the PSS input power and the downstream PSS rated power
  • the size controls the automatic gain controller to adjust the gain attenuation value, and the gain attenuation value is used to adjust the uplink gain and the downlink gain.
  • This application uses the downlink PSS rated power as the downlink PSS rated power of the automatic gain controller, and detects the relationship between the input PSS input power and the downlink PSS rated power to control the gain of the uplink and downlink input signals, avoiding
  • the automatic level control function frequently switches when the application peaks, and further controls the uplink gain and downlink gain.
  • the method can prevent frequent switching of signal levels, and can simultaneously control the downlink gain and the uplink gain in a synchronous manner, and avoid interference with the base station due to excessive uplink noise.
  • FIG. 3 is a flowchart of controlling the automatic gain controller to adjust the gain attenuation value according to the magnitude of the PSS input power and the downstream PSS rated power in an embodiment.
  • the method includes steps 302 to 304.
  • Step 301 When the PSS input power is greater than the downstream PSS rated power, control the automatic gain controller to increase the gain attenuation value until it is detected that the adjusted PSS input power is lower than the input downstream PSS rated power;
  • the PSS input power and the downlink PSS rated power in the input signal are obtained, where the downlink PSS rated power is used as the downlink PSS rated power.
  • the level of the downstream input signal and the upstream input signal should be automatically reduced according to the real-time detected PSS input power.
  • the automatic gain controller increases the gain attenuation value to ensure the output power of the AGC Should be kept within the allowable error range of the maximum output power.
  • the use of gain attenuation value adjustment to reduce the level of the downstream input signal and the upstream input signal is to adjust the gain attenuation value by controlling the gain devices of the near-end machine and the far-end machine.
  • the size of the gain attenuation value is accumulated by a counter, and the step of each accumulation can be defined by the engineer according to actual needs.
  • Step 302 When the PSS input power is less than or equal to the downlink PSS rated power, the automatic gain controller is controlled to adjust the gain attenuation value according to the difference between the downlink PSS rated power and the PSS input power within the preset time.
  • the PSS input power and the downlink PSS rated power in the input signal are obtained, where the downlink PSS rated power is used as the downlink PSS rated power.
  • the PSS input power is less than the downstream PSS rated power, obtain the power difference between the downstream PSS rated power and the PSS input power. Since the downstream PSS rated power is greater than the PSS input power, the power difference refers to the downstream PSS rated power minus the PSS input power
  • the level of the downstream input signal and the upstream input signal is increased to ensure that the output power of the AGC remains at the maximum output power.
  • the error is allowed Within range.
  • the preset time can be 30min, 60min, 120min, etc.
  • the preset time can be set by the engineer according to the control accuracy of the automatic gain controller. The above list is only for illustration and does not limit the preset time.
  • the method includes steps 402 to 404.
  • Step 401 Obtain the power difference between the downstream PSS rated power and the PSS input power within a preset time
  • the PSS input power is detected in real time within a preset time.
  • the downstream PSS rated power is used as the downstream PSS rated power.
  • the preset time can be 30min, 60min, 120min, etc.
  • the preset time can be determined by the engineer according to the specific signal cycle of the live network Set it yourself. Obtain the PSS input power in real time within the preset time, and calculate the difference between the downlink PSS rated power and the PSS input power detected in real time within the preset time.
  • Step 402 When the corresponding power difference within the preset time is higher than the power threshold, control the automatic gain controller to reduce the gain attenuation value.
  • the power threshold is used to set the allowable range of the PSS input power error.
  • the power threshold can be set by the engineer according to actual needs. It can be set to 2dB, 3dB, 5dB, 7dB or 10dB, etc. It should be noted that the above power threshold The value is for illustration only and does not limit the power threshold.
  • the automatic gain controller In the preset time, when the difference between the downstream PSS rated power and the real-time detected PSS input power is higher than the power threshold, it means that the currently detected PSS input power is not within the allowable range of PSS input power error, that is, the currently detected PSS input power is low , Need to control the automatic gain controller to reduce the gain attenuation value to increase the level of the downlink input signal and the uplink input signal, and then control the uplink gain and downlink gain.
  • controlling the automatic gain controller to reduce the gain attenuation value includes: detecting the gain attenuation value during the process of controlling the automatic gain controller to reduce the gain attenuation value; when the gain attenuation value is detected to be greater than zero, continue Decrease the gain attenuation value until the adjusted PSS input power is higher than the downstream PSS rated power.
  • the automatic gain controller reduces the gain attenuation value, it repeats the detection of the current automatic gain controller gain attenuation value. If the gain attenuation value of the current automatic gain controller is greater than zero, control the automatic gain controller to continue to reduce the gain attenuation value, and repeatedly check the currently adjusted PSS input power until the adjusted PSS input power is greater than or equal to the downstream PSS rated power , Then stop adjusting the gain attenuation value.
  • the method further includes: stopping adjusting the gain attenuation value when it is detected that the gain attenuation value is equal to zero.
  • the controller reduces the gain attenuation value.
  • the automatic gain controller reduces the gain attenuation value, it repeatedly checks the current automatic gain controller gain attenuation value. If the current automatic gain controller gain attenuation value is greater than zero, the automatic gain control is controlled. The controller continues to reduce the gain attenuation value until the gain attenuation value is equal to zero, then stop adjusting the gain attenuation value. If it is detected that the gain attenuation value is equal to zero, stop adjusting the gain attenuation value.
  • the method further includes: controlling the automatic gain controller to maintain the current gain attenuation value when the power difference is always lower than the power threshold within a preset time.
  • the power threshold is used to set the allowable range of the PSS input power error.
  • the power threshold can be set by the engineer according to actual needs. It can be set to 2dB, 3dB, 5dB, 7dB or 10dB, etc. It should be noted that the above power threshold The value is for illustration only and does not limit the power threshold.
  • the difference between the real-time detected PSS input power and the downlink PSS rated power within the preset time is always lower than the power threshold, it means that the currently detected PSS input power is within the allowable range of the PSS input power error.
  • the automatic gain controller is controlled to maintain the current The gain reduction value does not change.
  • the base station communication parameters are pre-estimated through automatic acquisition.
  • the base station communication parameters include: downlink input PSS power, maximum baseband power, and downlink input rated power, where the maximum baseband power is the maximum power within a preset period, and the preset period It can be adjusted appropriately according to the current network situation.
  • a calculation formula is used to obtain the downlink input PSS rated power.
  • the communication parameters of the base station that are set manually, the communication parameters of the base station include: the allocated power ratio of the LTE carrier where the PSS is located and the total number of subcarriers of the LTE carrier where the PSS is located.
  • Fig. 5 is a structural block diagram of a gain control device of an embodiment.
  • the device is applied to a system that requires gain adjustment, and the system that requires gain adjustment at least includes an automatic gain controller, and the device includes:
  • the detection module 501 is used to detect the input power of the main synchronization signal PSS in the input signal in real time;
  • the input signal of the system requiring gain adjustment includes the primary synchronization signal PSS
  • the detection module 502 is used to detect the PSS in the input signal in real time to obtain the input power of the real-time PSS.
  • PCI is composed of PSS+3*SSS
  • the PSS master synchronization signal occupies 6 RBs of the system bandwidth in the frequency domain, that is 72sc, which is used to indicate the ID in a physical-layer group (Physical-layer) including: 0, 1, 2 ( 3).
  • the obtaining module 502 is configured to obtain the downstream PSS rated power as the gain control threshold of the automatic gain controller;
  • the automatic gain control uses an effective combination of linear amplification and compression amplification to adjust the gain of the system input signal that requires gain adjustment.
  • the downlink PSS rated power of the AGC is compared with the input signal information. If the input signal information (power or voltage amplitude) does not match the downlink PSS rated power, the external attenuator is controlled to increase or decrease the gain attenuation value for the uplink And adjust the level of the downlink input signal.
  • the downlink PSS refers to the primary synchronization signal PSS in the downlink data.
  • the acquisition module 504 is used to obtain the communication parameters of the base station. According to the communication parameters of the base station, the rated power of the downlink PSS can be calculated, and the rated power of the downlink PSS is used as the rated power of the downlink PSS of the AGC .
  • the control module 503 is configured to control the automatic gain controller to adjust the gain attenuation value according to the magnitude of the PSS input power and the downlink PSS rated power, and the gain attenuation value is used to adjust the uplink gain and the downlink gain.
  • control module 503 is configured to calculate the rated power of the downlink PSS according to the communication parameters of the base station, and use the rated power of the downlink PSS as the rated power of the downlink PSS of the AGC. Obtain the relationship between the input power of the PSS and the rated power of the downlink PSS, and use the relationship to control the gain attenuation value.
  • the automatic gain controller adjusts the gain attenuation value to control the uplink and downlink gains of the system requiring gain adjustment. Using the gain attenuation value to adjust the level of the downstream input signal and the upstream input signal can be achieved by controlling the gain device of the near-end machine and the far-end machine to adjust the gain attenuation value.
  • the gain attenuation value is used to adjust the level of the input signal of the downlink to realize the gain adjustment of the downlink.
  • the gain attenuation value corresponding to the near-end unit is synchronously transmitted to the far-end unit, and the gain attenuation value can also control the level of the uplink input signal of the remote unit to adjust the gain of the uplink, that is, the gain attenuation value It can control the downlink gain and uplink gain in the system synchronously.
  • control module 503 is also used to control the automatic gain controller to increase the gain attenuation value when the PSS input power is greater than the downstream PSS rated power, until it is detected that the adjusted PSS input power is lower than the input downstream PSS Rated power; when the PSS input power is less than or equal to the downstream PSS rated power, obtain the power difference between the downstream PSS rated power and the PSS input power within the preset time. When the corresponding power difference within the preset time is higher than the power threshold, control The automatic gain controller reduces the gain attenuation value.
  • the PSS input power and the downstream PSS rated power in the input signal are obtained, where the downstream PSS rated power is used as the gain control threshold of the automatic gain controller.
  • the level of the downstream input signal and the upstream input signal should be automatically reduced according to the real-time detected PSS input power.
  • the automatic gain controller increases the gain attenuation value to ensure the output power of the AGC Should be kept within the allowable error range of the maximum output power.
  • the use of gain attenuation value adjustment to reduce the level of the downstream input signal and the upstream input signal is to adjust the gain attenuation value by controlling the gain devices of the near-end machine and the far-end machine.
  • the size of the gain attenuation value is accumulated by a counter, and the step of each accumulation can be defined by the engineer according to actual needs.
  • the PSS input power is less than or equal to the downlink PSS rated power, the PSS input power is obtained in real time within a preset time, and the difference between the downlink PSS rated power and the PSS input power detected in real time within the preset time is calculated.
  • the automatic gain controller In the preset time, when the difference between the downstream PSS rated power and the real-time detected PSS input power is higher than the power threshold, it means that the currently detected PSS input power is not within the allowable range of PSS input power error, that is, the currently detected PSS input power is low , Need to control the automatic gain controller to reduce the gain attenuation value. Decreasing the gain attenuation value can increase the level of the downlink input signal and the uplink input signal, and realize the increase of the downlink gain and the uplink gain.
  • the above-mentioned gain control device is applied to a system that requires gain adjustment.
  • the system that requires gain adjustment at least includes an automatic gain controller.
  • the gain control device includes: a detection module for real-time detection of the input power of the main synchronization signal PSS in the input signal; an acquisition module , Used to obtain the downstream PSS rated power as the gain control threshold of the automatic gain controller; the control module is used to control the automatic gain controller to adjust the gain attenuation value according to the PSS input power and the downstream PSS rated power.
  • the gain attenuation value is used for Adjust the input signal levels of the uplink and downlink.
  • This application uses the downlink PSS rated power as the gain control threshold of the automatic gain controller, and detects the relationship between the input PSS input power and the downlink PSS rated power to control the level of the uplink and downlink input signals to further control the uplink Gain and downlink gain.
  • the device can prevent frequent switching of signal levels, and can simultaneously control the downlink gain and uplink gain synchronously, so as to avoid interference with the base station due to excessive uplink noise.

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Abstract

本申请涉及一种增益控制方法和装置，包括自动增益控制器，通过实时检测输入信号中主同步信号PSS输入功率；获取作为自动增益控制器的增益控制门限的下行PSS额定功率；根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值，增益衰减值用于对上行链路增益和下行链路增益进行调整。本申请将下行PSS额定功率作为自动增益控制器的增益控制门限，检测输入的PSS输入功率和下行PSS额定功率的大小关系控制上行链路和下行链路的输入信号的电平，进一步控制上行链路增益和下行链路增益，以防止信号电平频繁切换，同时联动控制下行链路增益和上行链路增益，避免上行底噪过高干扰基站。

Description

增益控制方法和装置
相关申请
本申请要求2019年8月9日申请的，申请号为201910734029.5，发明名称为“增益控制方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及网络通信技术领域，特别是涉及增益控制方法和装置。
背景技术
随着我国移动通讯事业的飞速发展，移动通讯的用户量正不断地增加，以数字光纤直放站为例，数字光纤直放站是借助光纤进行信号传输的直放站，利用光纤传输损耗小、布线方便，适合远距离传输的特点，可解决村镇、旅游区、公路等收不到基站信号的问题，以及可解决大型及超大型建筑物内的信号覆盖问题，用于要求较高的大型高层区域建筑物(群)、小区等场合。
然而，在现网应用中，数字光纤直放站的输入信号的电平受现网中用户量的影响很大，尤其是在应用高峰，会出现自动电平控制功能频繁切换，不利于基站信号的处理。另外，下行链路和上行链路的增益是独立的，若上下行链路增益不匹配，也会对基站信号处理产生影响。
发明内容
根据本申请的各种实施例，提供一种增益控制方法，应用于需要增益调节的系统，所述需要增益调节的系统至少包括自动增益控制器，所述方法包括：
实时检测输入信号中主同步信号PSS输入功率；
获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率；
根据所述PSS输入功率和所述下行PSS额定功率的大小控制所述自动增益控制器调整增益衰减值，所述增益衰减值用于对上行链路增益和下行链路增益进行调整。
上述增益控制方法具有以下优点：
将下行PSS额定功率作为所述自动增益控制器的增益控制门限，检测输入的PSS输入功率和下行PSS额定功率的大小关系控制上行链路和下行链路的输入信号的电平，进一步控制上行链路增益和下行链路增益。该方法可以防止信号电平频繁切换，同时能够同步联动控制下行链路增益和上行链路增益，避免上行底噪过高干扰基站。
在其中一个实施例中，所述根据所述PSS输入功率和所述下行PSS额定功率的大小控制所述自动增益控制器调整增益衰减值，包括：
当所述PSS输入功率大于所述下行PSS额定功率时，控制所述自动增益控制器增大所述增益衰减值，直至检测到调整后的PSS输入功率低于输入所述下行PSS额定功率；
当所述PSS输入功率小于等于所述下行PSS额定功率时，根据预设时间内所述下行PSS额定功率与所述PSS输入功率的差值控制所述自动增益控制器调整增益衰减值。
在其中一个实施例中，所述根据预设时间内所述下行PSS额定功率与所述PSS输入功率的差值控制所述自动增益控制器调整增益衰减值，包括：
获取所述预设时间内所述下行PSS额定功率与所述PSS输入功率的功率差值；
当所述预设时间内对应的功率差值高于功率阈值时，控制所述自动增益控制器减小所述增益衰减值。
在其中一个实施例中，所述控制所述自动增益控制器减小所述增益衰减值，包括：
在控制所述自动增益控制器减小所述增益衰减值过程中，检测所述增益衰减值；
当检测到所述增益衰减值大于零时，继续减小所述增益衰减值，直至调整后的PSS输入功率高于所述下行PSS额定功率。
在其中一个实施例中，所述检测所述增益衰减值之后，所述方法还包括：当检测到所述增益衰减值等于零时，停止调整所述增益衰减值。
在其中一个实施例中，所述方法还包括：当所述预设时间内所述功率差值始终低于所述功率阈值时，控制所述自动增益控制器维持当前增益衰减值不变。
在其中一个实施例中，所述获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率，包括：根据预估的基站通信参数计算下行PSS额定功率，其计算公式为：下行输入PSS额定功率＝下行输入PSS功率/最大基带功率*下行输入额定功率，其中，最大基带功率为预设周期内的最大功率。
在其中一个实施例中，所述获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率，包括：根据设置的基站通信参数计算下行PSS额定功率，其计算公式为：下行输入PSS额定功率＝下行输入额定功率-PSS所在LTE载波的分配功率比–10*lg(PSS所在LTE载波的总子载波数/62)。
根据本申请的各种实施例，还提供一种增益控制装置，应用于需要增益调节的系统， 所述需要增益调节的系统至少包括自动增益控制器，所述装置包括：
检测模块，用于实时检测输入信号中主同步信号PSS输入功率；
获取模块，用于获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率；
控制模块，用于根据所述PSS输入功率和所述下行PSS额定功率的大小控制所述自动增益控制器调整增益衰减值，所述增益衰减值用于对上行链路增益和下行链路增益进行调整。
在其中一个实施例中，所述控制模块还用于，当所述PSS输入功率大于所述下行PSS额定功率时，控制所述自动增益控制器增大所述增益衰减值，直至检测到调整后的PSS输入功率低于输入所述下行PSS额定功率；当所述PSS输入功率小于等于所述下行PSS额定功率时，获取预设时间内所述下行PSS额定功率与所述PSS输入功率的功率差值，当所述预设时间内对应的功率差值始终低于功率阈值时，控制所述自动增益控制器减小所述增益衰减值。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1是本申请实施例的增益控制方法的应用环境示意图；
图2是本申请实施例的增益控制方法的流程图；
图3是本申请实施例的根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值的流程图；
图4是本申请实施例的根据预设时间内下行PSS额定功率与PSS输入功率的差值控制自动增益控制器调整增益衰减值的流程图；
图5是本申请实施例的增益控制装置的结构框图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
图1为一个实施例中增益控制方法的应用环境示意图。如图1所示，该应用环境包括但不限于直放站、分布式天线系统(DAS)等需要增益调节的系统，下面以数字光纤直放站为例，数字光纤直放站10包括近端机110和远端机120，一台近端机110下可级联多台远端 机120。数字光纤直放站10的下行链路的传输原理如下：下行信号从基站通过耦合器耦合到近端机110，近端机110利用天线接收下行信号，并通过下变频将下行信号转化为中频信号；中频信号通过后面自动增益控制器反馈的增益衰减值作用于增益衰减模块进行增益调整后送入模数转换器AD，增益调整后的中频信号经模数转换器AD采样后转换成数字信号；数字信号通过基带信号处理并打包传给光纤收发器，通过光纤传输到远端机120。远端机120通过光纤收发器接收近端机110的数字信号，该数字信号进行基带处理后，再通过数模转换器DA转换成模拟信号，该模拟信号经过上变频和功率放大器处理后通过天线发送出去。上行链路的传输原理与下行链路的传输原理对应，此处不在赘述。
本申请实施例中，需要增益调节的系统通过实时检测输入信号中主同步信号(Primary Synchronization Signal，PSS)的输入功率；获取作为自动增益控制器的增益控制门限的下行PSS额定功率；根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值，增益衰减值用于对上行链路增益和下行链路增益进行调整。本申请提供的方案能够通过检测输入的PSS输入功率和下行PSS额定功率的大小关系控制输入信号的电平，避免了在应用高峰时出现自动电平控制功能频繁切换，同时能够同步联动控制下行链路增益和上行链路增益，避免上行底噪过高干扰基站。
图2为一个实施例中增益控制方法的流程图。本申请提供一种增益控制方法，该需要增益调节的系统至少包括自动增益控制器，如图2所示，增益控制方法包括步骤202至步骤206。
步骤201：实时检测输入信号中主同步信号PSS输入功率；
具体的，在网络通信中，需要增益调节的系统的输入信号包括主同步信号PSS，通过实时检测输入信号中的PSS，获取实时PSS的输入功率。其中，PCI由PSS+3*SSS，PSS主同步信号频域上占系统带宽6个RB即72sc，是用于指示一个物理小区组(Physical-layer)内的ID包括：0，1，2(3个)。
步骤202：获取作为自动增益控制器的增益控制门限的下行PSS额定功率；
具体的，自动增益控制器(Automatic Gain Control，AGC)利用线性放大和压缩放大的有效组合能够实现对需要增益调节的系统上行链路和下行链路的输入信号的电平大小进行调整。通过AGC的下行PSS额定功率与输入信号信息进行对比，若输入信号信息(功率或电压幅值)与下行PSS额定功率不匹配，则控制外部衰减器增大或者减小增益衰减值对上行链路和下行链路的输入信号的电平进行调整。下行PSS指的是下行数据中的主同步信号PSS，获取基站通信参数，根据基站通信参数能够计算出下行PSS的额定功率，将下行PSS的额定功率作为AGC的下行PSS额定功率。
步骤203：根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值，增益衰减值用于对上行链路增益和下行链路增益进行调整。
具体的，根据基站通信参数计算出下行PSS的额定功率，将下行PSS的额定功率作为AGC的下行PSS额定功率。获取PSS输入功率与下行PSS额定功率的大小关系，利用该大小关系控制增益衰减值，自动增益控制器通过调整增益衰减值来控制需要增益调节的系统的上下行链路的增益。利用增益衰减值调整下行输入信号和上行输入信号的电平大小可以是通过控制近端机和远端机的增益器件来实现调整增益衰减值。具体的，增益衰减值用于调整下行链路的输入信号的电平大小，实现对下行链路的增益调整。该近端机对应的增益衰减值同步传送至远端机，则该增益衰减值还能够控制远端机的上行输入信号的电平，以实现对上行链路的增益进行调整，即增益衰减值能够使得该系统中的下行链路增益和上行链路增益的同步联动控制。
上述增益控制方法，通过实时检测输入信号中主同步信号PSS输入功率；获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率；根据所述PSS输入功率和所述下行PSS额定功率的大小控制所述自动增益控制器调整增益衰减值，所述增益衰减值用于对上行链路增益和下行链路增益进行调整。本申请将下行PSS额定功率作为所述自动增益控制器的下行PSS额定功率，检测输入的PSS输入功率和下行PSS额定功率的大小关系控制上行链路和下行链路输入信号的增益，避免了在应用高峰时出现自动电平控制功能频繁切换，进一步控制上行链路增益和下行链路增益。该方法可以防止信号电平频繁切换，同时能够同步联动控制下行链路增益和上行链路增益，避免上行底噪过高干扰基站。
图3为一个实施例中根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值的流程图，该方法包括步骤302至步骤304。
步骤301：当PSS输入功率大于下行PSS额定功率时，控制自动增益控制器增大增益衰减值，直至检测到调整后的PSS输入功率低于输入下行PSS额定功率；
具体的，获取输入信号中PSS输入功率和下行PSS额定功率，其中，下行PSS额定功率作为下行PSS额定功率。当PSS输入功率大于下行PSS额定功率时，应根据实时检测的PSS输入功率自动减小下行输入信号和上行输入信号的电平大小，自动增益控制器通过增大增益衰减值来保证AGC的输出功率应保持在最大输出功率的误差允许范围之内。其中，利用增益衰减值调整减小下行输入信号和上行输入信号的电平大小是通过控制近端机和远端机的增益器件来实现调整增益衰减值。增益衰减值的大小通过一个计数器进行累加，每次累加的步进可根据实际需求由工程师进行定义。在调整增益衰减值的过程中，检测调整后的PSS输入功率与输入下行PSS额定功率的大小，若调整后的PSS输入功率大于输入下行PSS额定功 率，则继续增大增益衰减值，直到PSS输入功率不超过输入PSS额定功率为止。
步骤302：当PSS输入功率小于等于下行PSS额定功率时，根据预设时间内下行PSS额定功率与PSS输入功率的差值控制自动增益控制器调整增益衰减值。
具体的，获取输入信号中PSS输入功率和下行PSS额定功率，其中，下行PSS额定功率作为下行PSS额定功率。当PSS输入功率小于下行PSS额定功率时，获取下行PSS额定功率与PSS输入功率的功率差值，由于下行PSS额定功率大于PSS输入功率，该功率差值是指下行PSS额定功率减去PSS输入功率的差值，并根据预设时间内检测的PSS输入功率和下行PSS额定功率的差值增加下行输入信号和上行输入信号的电平大小，以保证AGC的输出功率保持在最大输出功率的误差允许范围之内。预设时间可以是30min，60min，120min等，预设时间可由工程师根据自动增益控制器的控制精度自行设置，上述列举仅用于举例说明，不对预设时间作限定。
图4为一个实施例中根据预设时间内下行PSS额定功率与PSS输入功率的差值控制自动增益控制器调整增益衰减值的流程图，该方法包括步骤402至步骤404。
步骤401：获取预设时间内下行PSS额定功率与PSS输入功率的功率差值；
具体的，预设时间内实时检测PSS输入功率，其中，下行PSS额定功率作为下行PSS额定功率，预设时间可以是30min，60min，120min等，预设时间可由工程师根据现网的具体信号周期情况自行设置。在预设时间内实时获取PSS输入功率，且计算预设时间内实时检测的下行PSS额定功率和PSS输入功率的差值。
步骤402：当预设时间内对应的功率差值高于功率阈值时，控制自动增益控制器减小增益衰减值。
具体的，功率阈值是用于设置PSS输入功率误差允许范围，功率阈值可以是工程师根据实际需求进行设置，可以设置为2dB、3dB、5dB、7dB或10dB等，需要说明的是，上述功率阈值的数值仅用于举例说明，不对功率阈值进行限制。预设时间内，当下行PSS额定功率与实时检测的PSS输入功率的差值高于功率阈值时，表示当前检测的PSS输入功率不在PSS输入功率误差允许范围，即当前检测的PSS输入功率偏低，需要控制自动增益控制器减小增益衰减值，以增加下行输入信号和上行输入信号的电平大小，进而控制上行链路增益和下行链路增益。
应该理解的是，虽然图2-4的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，这些步骤可以以其它的顺序执行。而且，图2-4中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完 成，而是可以在不同的时刻执行，这些子步骤或者阶段的执行顺序也不必然是依次进行，而是可以与其它步骤或者其它步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
在其中一个实施例中，控制自动增益控制器减小增益衰减值，包括：在控制自动增益控制器减小增益衰减值过程中，检测增益衰减值；当检测到增益衰减值大于零时，继续减小增益衰减值，直至调整后的PSS输入功率高于下行PSS额定功率。
具体的，当预设时间内对应的功率差值高于功率阈值时，则表示当前检测的PSS输入功率不在PSS输入功率误差允许范围，即当前检测的PSS输入功率偏低，需使自动增益控制器减小增益衰减值，在自动增益控制器减小增益衰减值过程中，重复检测当前自动增益控制器的增益衰减值。若当前自动增益控制器的增益衰减值大于零，则控制自动增益控制器继续减小增益衰减值，并反复检测当前调整后的PSS输入功率，直至调整后的PSS输入功率大于等于下行PSS额定功率，则停止调整增益衰减值。
在其中一个实施例中，检测增益衰减值之后，方法还包括：当检测到增益衰减值等于零时，停止调整增益衰减值。
具体的，当预设时间内对应的功率差值始终低于功率阈值时，则表示当前检测的PSS输入功率不在PSS输入功率误差允许范围，即当前检测的PSS输入功率偏低，需使自动增益控制器减小增益衰减值，在自动增益控制器减小增益衰减值过程中，重复检测当前自动增益控制器的增益衰减值，当前自动增益控制器的增益衰减值大于零，则控制自动增益控制器继续减小增益衰减值，直至增益衰减值等于零，则停止调整增益衰减值。若检测到增益衰减值等于零时，停止调整增益衰减值。
在其中一个实施例中，方法还包括：当预设时间内功率差值始终低于功率阈值时，控制自动增益控制器维持当前增益衰减值不变。
具体的，功率阈值是用于设置PSS输入功率误差允许范围，功率阈值可以是工程师根据实际需求进行设置，可以设置为2dB、3dB、5dB、7dB或10dB等，需要说明的是，上述功率阈值的数值仅用于举例说明，不对功率阈值进行限制。当预设时间内实时检测的PSS输入功率与下行PSS额定功率的差值始终低于功率阈值时，表示当前检测的PSS输入功率在PSS输入功率误差允许范围，此时控制自动增益控制器维持当前增益衰减值不变。
在其中一个实施例中，获取作为自动增益控制器的增益控制门限的下行PSS额定功率，包括：根据预估的基站通信参数计算下行PSS额定功率，其计算公式为：下行输入PSS额定功率＝下行输入PSS功率/最大基带功率*下行输入额定功率，其中，最大基带功率为预设周期内的最大功率。
具体的，通过自动获取的方式预估计基站通信参数，基站通信参数包括：下行输入 PSS功率、最大基带功率和下行输入额定功率，其中，最大基带功率为预设周期内的最大功率，预设周期可以根据现网情况适当调整。根据预估计的基站通信参数利用计算公式获取下行输入PSS额定功率，计算公式为：下行输入PSS额定功率＝下行输入PSS功率/最大基带功率*下行输入额定功率。将获取的下行输入PSS额定功率作为自动增益控制器的下行PSS额定功率。
在其中一个实施例中，获取作为自动增益控制器的增益控制门限的下行PSS额定功率，包括：根据设置的基站通信参数计算下行PSS额定功率，其计算公式为：下行输入PSS额定功率＝下行输入额定功率-PSS所在LTE载波的分配功率比–10*lg(PSS所在LTE载波的总子载波数/62)。
具体的，通过手动设置的方式设置的基站通信参数，基站通信参数包括：PSS所在LTE载波的分配功率比和PSS所在LTE载波的总子载波数。根据手动设置的基站通信参数利用计算公式获取下行输入PSS额定功率，计算公式为：下行输入PSS额定功率＝下行输入额定功率-PSS所在LTE载波的分配功率比–10*lg(PSS所在LTE载波的总子载波数/62)。将获取的下行输入PSS额定功率作为自动增益控制器的下行PSS额定功率。
图5为一个实施例的增益控制装置的结构框图。该装置应用于需要增益调节的系统，所述需要增益调节的系统至少包括自动增益控制器，该装置包括：
检测模块501，用于实时检测输入信号中主同步信号PSS输入功率；
具体的，在网络通信中，需要增益调节的系统的输入信号包括主同步信号PSS，检测模块502用于通过实时检测输入信号中的PSS，获取实时PSS的输入功率。其中，PCI由PSS+3*SSS，PSS主同步信号频域上占系统带宽6个RB即72sc，是用于指示一个物理小区组(Physical-layer)内的ID包括：0，1，2(3个)。
获取模块502，用于获取作为自动增益控制器的增益控制门限的下行PSS额定功率；
具体的，自动增益控制器(Automatic Gain Control，AGC)利用线性放大和压缩放大的有效组合能够实现对需要增益调节的系统输入信号的增益进行调整。通过AGC的下行PSS额定功率与输入信号信息进行对比，若输入信号信息(功率或电压幅值)与下行PSS额定功率不匹配，则控制外部衰减器增大或者减小增益衰减值对上行链路和下行链路的输入信号的电平进行调整。下行PSS指的是下行数据中的主同步信号PSS，获取模块504用于获取基站通信参数，根据基站通信参数能够计算出下行PSS的额定功率，将下行PSS的额定功率作为AGC的下行PSS额定功率。
控制模块503，用于根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值，增益衰减值用于对上行链路增益和下行链路增益进行调整。
具体的，控制模块503用于根据基站通信参数计算出下行PSS的额定功率，将下行PSS的额定功率作为AGC的下行PSS额定功率。获取PSS输入功率与下行PSS额定功率的大小关系，利用该大小关系控制增益衰减值，自动增益控制器通过调整增益衰减值来控制需要增益调节的系统的上下行链路的增益。利用增益衰减值调整下行输入信号和上行输入信号的电平大小可以是通过控制近端机和远端机的增益器件来实现调整增益衰减值。具体的，增益衰减值用于调整下行链路的输入信号的电平大小，实现对下行链路的增益调整。该近端机对应的增益衰减值同步传送至远端机，则该增益衰减值还能够控制远端机的上行输入信号的电平，以实现对上行链路的增益进行调整，即增益衰减值能够使得该系统中的下行链路增益和上行链路增益的同步联动控制。
在其中一个实施例中，控制模块503还用于，当PSS输入功率大于下行PSS额定功率时，控制自动增益控制器增大增益衰减值，直至检测到调整后的PSS输入功率低于输入下行PSS额定功率；当PSS输入功率小于等于下行PSS额定功率时，获取预设时间内下行PSS额定功率与PSS输入功率的功率差值，当预设时间内对应的功率差值高于功率阈值时，控制自动增益控制器减小增益衰减值。
具体的，获取输入信号中PSS输入功率和下行PSS额定功率，其中，下行PSS额定功率作为自动增益控制器的增益控制门限。当PSS输入功率大于下行PSS额定功率时，应根据实时检测的PSS输入功率自动减小下行输入信号和上行输入信号的电平大小，自动增益控制器通过增大增益衰减值来保证AGC的输出功率应保持在最大输出功率的误差允许范围之内。其中，利用增益衰减值调整减小下行输入信号和上行输入信号的电平大小是通过控制近端机和远端机的增益器件来实现调整增益衰减值。增益衰减值的大小通过一个计数器进行累加，每次累加的步进可根据实际需求由工程师进行定义。在调整增益衰减值的过程中，检测调整后的PSS输入功率与输入下行PSS额定功率的大小，若调整后的PSS输入功率大于输入下行PSS额定功率，则继续增大增益衰减值，直到PSS输入功率不超过输入PSS额定功率为止。当PSS输入功率小于等于下行PSS额定功率时，在预设时间内实时获取PSS输入功率，且计算预设时间内实时检测的下行PSS额定功率和PSS输入功率的差值。预设时间内，当下行PSS额定功率与实时检测的PSS输入功率的差值高于功率阈值时，表示当前检测的PSS输入功率不在PSS输入功率误差允许范围，即当前检测的PSS输入功率偏低，需要控制自动增益控制器减小增益衰减值。减小增益衰减值能够增加下行输入信号和上行输入信号的电平，实现增加下行链路增益和上行链路增益。
上述增益控制装置，应用于需要增益调节的系统，需要增益调节的系统至少包括自动增益控制器，该增益控制装置包括：检测模块，用于实时检测输入信号中主同步信号PSS输 入功率；获取模块，用于获取作为自动增益控制器的增益控制门限的下行PSS额定功率；控制模块，用于根据PSS输入功率和下行PSS额定功率的大小控制自动增益控制器调整增益衰减值，增益衰减值用于对上行链路和下行链路的输入信号的电平进行调整。本申请将下行PSS额定功率作为自动增益控制器的增益控制门限，检测输入的PSS输入功率和下行PSS额定功率的大小关系控制上行链路和下行链路的输入信号的电平进一步控制上行链路增益和下行链路增益。该装置可以防止信号电平频繁切换，同时能够同步联动控制下行链路增益和上行链路增益，避免上行底噪过高干扰基站。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种增益控制方法，其特征在于，包括：
    实时检测输入信号中主同步信号PSS输入功率；
    获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率；
    根据所述PSS输入功率和所述下行PSS额定功率的大小控制自动增益控制器调整增益衰减值，所述增益衰减值用于对上行链路增益和下行链路增益进行调整。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述PSS输入功率和所述下行PSS额定功率的大小控制所述自动增益控制器调整增益衰减值，包括：
    当所述PSS输入功率大于所述下行PSS额定功率时，控制所述自动增益控制器增大所述增益衰减值，直至检测到调整后的PSS输入功率低于输入所述下行PSS额定功率；
    当所述PSS输入功率小于等于所述下行PSS额定功率时，根据预设时间内所述下行PSS额定功率与所述PSS输入功率的差值控制所述自动增益控制器调整增益衰减值。
  3. 根据权利要求2所述的方法，其特征在于，所述根据预设时间内所述下行PSS额定功率与所述PSS输入功率的差值控制所述自动增益控制器调整增益衰减值，包括：
    获取所述预设时间内所述下行PSS额定功率与所述PSS输入功率的功率差值；
    当所述预设时间内对应的功率差值高于功率阈值时，控制所述自动增益控制器减小所述增益衰减值。
  4. 根据权利要求3所述的方法，其特征在于，所述控制所述自动增益控制器减小所述增益衰减值，包括：
    在控制所述自动增益控制器减小所述增益衰减值过程中，检测所述增益衰减值；
    当检测到所述增益衰减值大于零时，继续减小所述增益衰减值，直至调整后的PSS输入功率高于所述下行PSS额定功率。
  5. 根据权利要求4所述的方法，其特征在于，所述检测所述增益衰减值之后，所述方法还包括：当检测到所述增益衰减值等于零时，停止调整所述增益衰减值。
  6. 根据权利要求3所述的方法，其特征在于，所述方法还包括：当所述预设时间内所述功率差值始终低于所述功率阈值时，控制所述自动增益控制器维持当前增益衰减值不变。
  7. 根据权利要求1所述的方法，其特征在于，所述获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率，包括：根据预估的基站通信参数计算下行PSS额定功率，其计算公式为：
    下行输入PSS额定功率＝下行输入PSS功率/最大基带功率*下行输入额定功率，其中，最大基带功率为预设周期内的最大功率。
  8. 根据权利要求1所述的方法，其特征在于，所述获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率，包括：根据设置的基站通信参数计算下行PSS额定功率，其计算公式为：
    下行输入PSS额定功率＝下行输入额定功率-PSS所在LTE载波的分配功率比–10*lg(PSS所在LTE载波的总子载波数/62)。
  9. 一种增益控制装置，其特征在于，应用于需要增益调节的系统，所述需要增益调节的系统至少包括自动增益控制器，所述装置包括：
    检测模块，用于实时检测输入信号中主同步信号PSS输入功率；
    获取模块，用于获取作为所述自动增益控制器的增益控制门限的下行PSS额定功率；
    控制模块，用于根据所述PSS输入功率和所述下行PSS额定功率的大小控制所述自动增益控制器调整增益衰减值，所述增益衰减值用于对上行链路增益和下行链路增益进行调整。
  10. 根据权利要求9所述的装置，其特征在于，所述控制模块还用于，
    当所述PSS输入功率大于所述下行PSS额定功率时，控制所述自动增益控制器增大所述增益衰减值，直至检测到调整后的PSS输入功率低于输入所述下行PSS额定功率；
    当所述PSS输入功率小于等于所述下行PSS额定功率时，获取预设时间内所述下行PSS额定功率与所述PSS输入功率的功率差值，当所述预设时间内对应的功率差值高于功率阈值时，控制所述自动增益控制器减小所述增益衰减值。
PCT/CN2020/106627 2019-08-09 2020-08-03 增益控制方法和装置 WO2021027609A1 (zh)

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