CN106559866A - A kind of auto gain control method and system - Google Patents
A kind of auto gain control method and system Download PDFInfo
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- CN106559866A CN106559866A CN201510642963.6A CN201510642963A CN106559866A CN 106559866 A CN106559866 A CN 106559866A CN 201510642963 A CN201510642963 A CN 201510642963A CN 106559866 A CN106559866 A CN 106559866A
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- gain error
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
Abstract
The present invention relates to communication technical field, and in particular to a kind of AGC system, including：First power statistic module, for counting the first reception average power signal in cycle very first time statistical length；Second power statistic module, for counting the second reception average power signal in the second time cycle statistical length；Gain error computing module is lowered, mathematic interpolation is carried out with first object power to the first reception average power signal, to obtain downward gain error；Gain error computing module is raised, mathematic interpolation is carried out to the second reception average power signal and the second target power, to obtain rise gain error；Gain error selecting module, selects corresponding gain error to adjust the gain of the radio frequency amplifier of receiver.The present invention provides the auto gain control method and system of quick and strong robustness, protects the stability of gain control, can greatly reduce cell search time and ensure the fixed-point performance required for cell search algorithms while good received signal quality is obtained.
Description
Technical field
The present invention relates to communication technical field, and in particular to a kind of auto gain control method and system.
Background technology
In a communications system, signal amplifies through the radio frequency amplifier (LNA/PGA) of receiver and is adjusted to
Will into analog/digital converter (Analog to Digital Converter, ADC) after suitable power
Analog signal is converted into data signal, if signal is amplified too much by radio frequency amplifier, can cause letter
Number exceed the range of analog/digital converter, signal is saturated peak clipping, and signal quality is destroyed；If
Signal is exaggerated too little, then the data signal station accuracy after analog/digital converter can be caused to quantify is too
It is low, affect demodulation receiving algorithm.
Automatic growth control (Automatic Gain Control, AGC) device is automatic by backfeed loop
Received signal power is adjusted to into target power so that signal is not saturated and station accuracy is also guaranteed,
It is communication equipment, particularly one of important circuit of communications receiving equipment.In existing receiver automatically
Gain control is as shown in figure 1, its course of work is：Length in statistics a period of time T is for N's
Average power signal P is received, reception average power signal P is transformed into behind dB domains and dB is transformed into
The target power P in domaintargetSubtracted each other, obtained gain error G in dB domains, gain error G is entered
Row is smooth obtain it is smooth after gain errorGain error after this is smoothMade by backfeed loop
For radio frequency amplifier (LNA/PGA).Auto gain control method as described above, initial little
The power statistic cycle grown is needed very much during area searching.Therefore the time that cell searching is consumed is longer so that eventually
Terminate into or switching cell speed it is slower.
The content of the invention
It is an object of the present invention to provide a kind of auto gain control method, solves above technical problem；
The present invention also aims to, there is provided a kind of AGC system, solve above technical problem；
Technical problem solved by the invention can employ the following technical solutions to realize：
A kind of auto gain control method, wherein, including obtain lower gain error the step of：
Step 1, one first power statistic module count the first reception in a cycle very first time statistical length
Average power signal, one second power statistic module count second in one second time cycle statistical length
Average power signal is received, the cycle very first time statistical length was counted less than second time cycle
Length；
Step 2, carries out mathematic interpolation to the described first reception average power signal and a first object power,
Gain error is lowered to obtain；
Whether step 3, judge the downward gain error less than 0, if it is, selecting the downward gain
Error is used for the gain for adjusting radio frequency amplifier, then re-executes step 1.
The auto gain control method of the present invention, also including the step of raising gain error is obtained, in described
When gain error is lowered more than or equal to 0 described in step 3, perform following steps：
Step 4, obtains described second and receives average power signal, and receive signal averaging to described second
Power and one second target power carry out mathematic interpolation, to obtain rise gain error；
Step 5, according to the previous cycle it is calculated it is smooth after gain error the rise gain is missed
Difference is smoothed, to obtain the rise gain error after smoothing；
Whether step 6, judge the rise gain error after described smoothing more than 0, if it is, selecting described
Rise gain error after smooth is used for the gain for adjusting the radio frequency amplifier.
The auto gain control method of the present invention, in the step 1, described first receives signal averaging work(
Rate is prepared by the following：
Wherein, PshortAverage power signal is received for first；Nshort
Length for the cycle very first time is counted；I (n) is the real part for receiving signal；Q (n) is the void for receiving signal
Portion.
The auto gain control method of the present invention, in the step 1, described second receives signal averaging work(
Rate is prepared by the following：
Wherein, PlongAverage power signal is received for second；NlongFor
The length points of the second time cycle；I (n) is the real part for receiving signal；Q (n) is the imaginary part for receiving signal.
The auto gain control method of the present invention, in the step 2, receives signal averaging by described first
Power and the target power carry out difference operation after being transformed into decibel domain, the decibel domain for obtaining it is described under
Adjust gain error be：
Wherein, GdownFor the downward gain error in decibel domain；For conversion
To the first reception average power signal in decibel domain；To be transformed into the target power in decibel domain.
The auto gain control method of the present invention, in the step 4, receives signal averaging by described second
Power and the target power carry out difference operation after being transformed into decibel domain, the decibel domain for obtaining it is described on
Adjust gain error be：
Wherein, GupFor the rise gain error in decibel domain；To be transformed into point
The second reception average power signal in shellfish domain；To be transformed into the target power in decibel domain.
The auto gain control method of the present invention, it is in the step 3, before re-executing step 1, right
Described second power statistic for receiving average power signal resets, and the rise gain after described smoothing is missed
Difference resets.
The auto gain control method of the present invention, in the step 5, it is described it is smooth after rise gain miss
Difference is prepared by the following：
Wherein,For the rise gain error after smoothing；GupFor the rise gain error in decibel domain；αlong
For smoothing factor, value is 1/2,1/4 ..., 1/32；Obtain for previous second setting time computation of Period
It is smooth after rise gain error.
The present invention auto gain control method, the cycle very first time statistical length be 1/4, or
1/2 or 1 OFDM symbol.
The auto gain control method of the present invention, when the second time cycle statistical length is described first
Between 2 times or 4 times or 8 times of the cycle, and be not less than 1 OFDM symbol length,
The auto gain control method of the present invention, the first object power are higher than second target power.
The present invention also provides a kind of AGC system, is connected in the backfeed loop of a receiver,
Including：
First power statistic module, for counting the first reception signal averaging work(in the cycle very first time
Rate；
Second power statistic module, for counting the second reception signal averaging work(in one second time cycle
Rate；
Gain error computing module is lowered, is connected with the first power statistic module, is connect to described first
Receiving average power signal and a first object power carries out mathematic interpolation, to obtain downward gain error；
Gain error computing module is raised, is connected with the second power statistic module, is connect to described second
Receiving average power signal and one second target power carries out mathematic interpolation, to obtain rise gain error；
Gain error selecting module, respectively with the downward gain error computing module and the rise gain
Error calculating module connects, and whether is less than 0 or the comparison rise for the comparison downward gain error
Whether gain error is more than 0, to select corresponding gain error, the gain error to be used to adjust described
The gain of the radio frequency amplifier of receiver.
The AGC system of the present invention, also including decibel domain modular converter,
It is connected between the first power statistic module and the downward gain error computing module, is used for
Described first reception average power signal and the first object power are transformed into into a decibel domain；
And/or,
It is connected between the second power statistic module and the rise gain error computing module, is used for
Described second reception average power signal and second target power are transformed into into a decibel domain.
The AGC system of the present invention, also including smoothing module, is connected to the gain and misses
Between difference selecting module and the rise gain error module, for putting down to the rise gain error
It is sliding to process with the rise gain error after being smoothed.
The present invention AGC system, the cycle very first time statistical length be 1/4, or
1/2 or 1 OFDM symbol.
The AGC system of the present invention, when the second time cycle statistical length is described first
Between 2 times or 4 times or 8 times of the cycle, and be not less than 1 OFDM symbol length.
Beneficial effect：As using above technical scheme, the present invention provides a kind of quick and strong robustness
Auto gain control method and system, protect gain control while good received signal quality is obtained
Stability, cell search time can be greatly reduced and ensure the fixed-point performance required for cell search algorithms.
Description of the drawings
System structure diagrams of the Fig. 1 for prior art；
Fig. 2 is the schematic flow sheet of the auto gain control method of the present invention；
Fig. 3 is a kind of improved method flow diagram of the auto gain control method of the present invention；
Fig. 4 is a kind of method flow diagram of specific embodiment of the auto gain control method of the present invention；
Fig. 5 is the structural representation of the AGC system of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are without work
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that the embodiment and the spy in embodiment in the case where not conflicting, in the present invention
Levy and can be mutually combined.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as the present invention's
Limit.
When search of initial zone is carried out, the radio frequency amplifier of receiver needs to be adjusted to suitable gain,
So that the power of signal is close to the target power of algorithm setting, cell search algorithms could obtain good property
Energy.In such a scenario, terminal does not have the information such as system frame structure, timing, and terminal is in and receives all the time
Under state, using automatic gain control equipment of the prior art, it is possible to which the reception of sub-frame of uplink is believed
Including number power statistic, if up subframe with the presence of the terminal interference for closing on, then can cause cell searching
The descending sub frame data (including main synchronizing sequence PSS and secondary synchronization sequences SSS) for being used are adjusted to very little,
The performance of station accuracy and algorithm is have lost, there is no signal if up subframe, then can cause automatic gain
Gain is adjusted very big by control device, causes descending sub frame saturation.
Ascending-descending subframes allocation table of the following table for TDD-LTE and TD-SCDMA：
Such as upper table, according to the different proportioning of up-downgoing, it is divided into 7 kinds of different configurations, wherein, " D " generation
Table this subframe is used for downlink transfer, and " U " represents this subframe for uplink, " S " be by DwPTS,
The special subframe of GP and UpPTS compositions, DwPTS (Downlink Pilot Time Slot) are led for descending
Frequency time slot, GP (Guard Period) is for up-downgoing translation and protection, UpPTS (Uplink Pilot Time
Slot it is) uplink pilot time slot.
Sub-frame of uplink in time division communication system (TDD-LTE) is time of the terminal to base station sending signal
Window, in sub-frame of uplink, terminal does not receive the downstream signal from base station, and may receive and close on
The up sending signal of terminal.There is no the signal for expecting to receive in sub-frame of uplink, this causes oneself traditional
Dynamic gain control can not ensure stablizing for gain control while good received signal quality is obtained
Property.
The present invention provides a kind of auto gain control method, with reference to Fig. 2, including obtains downward gain error
The step of：
Step 1, one first power statistic module count the first reception in a cycle very first time statistical length
Average power signal, one second power statistic module count second in one second time cycle statistical length
Average power signal is received, cycle very first time statistical length is less than the second time cycle statistical length；
Step 2, after judging that the first reception average power signal statistics is finished, receives signal to first and puts down
Power and a first object power carry out mathematic interpolation, to obtain downward gain error；
Step 3, when judging that lowering gain error is less than 0, selects downward gain error to be used to adjust radio frequency
The gain of amplifier, then re-executes step 1.
The auto gain control method of the present invention, also including the gain error for obtaining rise radio frequency amplifier
Step, when lowering gain error more than or equal to 0 in step 3, performs following steps, with reference to Fig. 3：
Step 4, after judging that the second reception average power signal statistics is finished, obtains second and receives letter
Number mean power, and mathematic interpolation is carried out to the second reception average power signal and one second target power,
Gain error is raised to obtain；
Step 5, according to the previous cycle it is calculated it is smooth after gain error enter to raising gain error
Row is smooth, to obtain the rise gain error after smoothing；
Whether step 6, the rise gain error after judging to smooth are more than 0, if it is, after selecting to smooth
Raising gain error is used to adjust the gain of radio frequency amplifier.
In above-mentioned steps 1, the first reception average power signal is prepared by the following：
Wherein, PshortAverage power signal is received for first；Nshort
For cycle very first time statistical length；I (n) is the real part for receiving signal；Q (n) is the imaginary part for receiving signal.
Second reception average power signal is prepared by the following：
Wherein, PlongAverage power signal is received for second；NlongFor
Second time cycle statistical length；I (n) is the real part for receiving signal；Q (n) is the imaginary part for receiving signal.
The cycle very first time statistical length of the present invention is less than the second time cycle statistical length, i.e., first receives letter
The measurement period of number mean power is shorter than the measurement period of the second reception average power signal, cycle is short can
To control gain downward in case stop signal long-time saturation, cycle length can control gain raise so that
Signal power is close to target power, obtains more preferable signal quality, and both combine and can cause to receive signal
Try one's best close to target power under the premise of undersaturated so that cell search algorithms obtain good performance.
The auto gain control method of the present invention, in step 2, receives average power signal and mesh by first
Mark power carries out difference operation after being transformed into decibel domain, and the downward gain error in the decibel domain for obtaining is：
Wherein, GdownFor the downward gain error in decibel domain；For conversion
To the first reception average power signal in decibel domain；To be transformed into the target power in decibel domain.
The auto gain control method of the present invention, in step 4, receives average power signal and mesh by second
Mark power carries out difference operation after being transformed into decibel domain, and the rise gain error in the decibel domain for obtaining is：
Wherein, GupFor the rise gain error in decibel domain；To be transformed into point
The second reception average power signal in shellfish domain；To be transformed into the target power in decibel domain.
The auto gain control method of the present invention, in step 3, before re-executing step 1, to second
The power statistic for receiving average power signal resets, and the rise gain error after smooth is reset.
The present invention auto gain control method, in step 5, smooth after rise gain error by with
Lower method is obtained：
Wherein,For the rise gain error after smoothing；GupFor the rise gain error in decibel domain；αlong
For smoothing factor, value is 1/2,1/4 ..., 1/32；It is calculated flat for previous second time cycle
Rise gain error after cunning.
The auto gain control method of the present invention, cycle very first time statistical length are 1/4, or 1/2
Or 1 orthogonal frequency division multiplex OFDM symbol, gain error is not done smooth；Second time cycle statistics length
Degree can select 2,4 or 8 times for period 1 statistical length, but length is at least 1 OFDM symbol
Number length, smoothing factor can set gain as 1/2,1/4,1/8 or 1/16 etc..1 OFDM symbol
Length 66.67us, such configuration cause the cycle very first time statistical length that gain is lowered short enough, protect
The long time saturation of the anti-stop signal of the rapid downward regulation when signal power is too high is demonstrate,proved, while also causing in gain
The the second time cycle statistical length long enough adjusted, the power statistic degree of accuracy are higher, and signal power to the greatest extent can may be used
It is close to target power energy；The second target power of first object power ratio is highBoth are present with ShiShimonoseki
System：To prevent gain control from shaking back and forth.
A kind of specific embodiment, with reference to Fig. 4, comprises the following steps：
Step s1, judges whether the first reception average power signal counts and terminates, if not, continuing executing with step
Rapid s1, if it is, execution step s2；
Step s2, carries out mathematic interpolation to the first reception average power signal and a first object power, with
Calculate and lower gain error；
Whether step s3, judge to lower gain error more than or equal to 0, if not, selecting the downward gain
Error is used for the gain for adjusting radio frequency amplifier, and average power signal and the second reception letter are received to first
Number mean power resets, if it is, execution step s4；
Step s4, judges whether the second reception average power signal counts and terminates, if not, execution step
s1；
Step s5, carries out mathematic interpolation to the second reception average power signal and one second target power, with
Obtain and raise gain error and smoothed, to obtain the rise gain error after smoothing；
Whether step s6, the rise gain error after judging to smooth are less than or equal to 0, if not, selecting on this
Adjust gain error to be used to adjust the gain of radio frequency amplifier, and average power signal and second is received to first
Receive average power signal to reset, if it is, re-executing step s1.
The present invention also provides a kind of AGC system, is connected in the backfeed loop of a receiver,
Reference Fig. 5, including：
First power statistic module 11, for counting the first reception signal averaging in the cycle very first time
Power；
Second power statistic module 21, for counting the second reception signal averaging in one second time cycle
Power；
Gain error computing module 12 is lowered, is connected with the first power statistic module 11, letter is received to first
Number mean power carries out mathematic interpolation with a first object power, to obtain downward gain error；
Gain error computing module 22 is raised, is connected with the second power statistic module 21, letter is received to second
Number mean power carries out mathematic interpolation with one second target power, to obtain rise gain error.
Gain error selecting module 31, respectively with downward gain error computing module 12 and rise gain error
Computing module 22 connects, and for comparing to lower gain error and whether be less than 0 or compare rise gain error is
It is no to be more than 0, to select corresponding gain error, gain error to be used for the radio frequency amplifier for adjusting receiver
Gain.
The AGC system of the present invention, also including decibel domain modular converter,
It is connected to the first power statistic module 11 and lowers between gain error computing module 12, for incites somebody to action
First reception average power signal and first object power are transformed into a decibel domain；
And/or,
It is connected to the second power statistic module 21 and raises between gain error computing module, for by second
Receive average power signal and the second target power is transformed into a decibel domain.
The AGC system of the present invention, also including smoothing module, is connected to gain error choosing
Select module 31 and raise between gain error module, for being smoothed to obtain to raising gain error
Rise gain error after must smoothing.
The AGC system of the present invention, cycle very first time statistical length are 1/4, or 1/2
Or 1 orthogonal frequency division multiplex OFDM symbol.
The AGC system of the present invention, the second time cycle statistical length were united for the cycle very first time
2 times or 4 times or 8 times of meter length, and it is not less than 1 OFDM symbol length.
The present invention is using the first power statistic module 11, downward gain error computing module 12, gain error
The fast gain control loop and the second power statistic module 21, rise gain that selecting module 31 is constituted is missed
Difference computing module 22, and the slow gain control loop that constitutes of gain error selecting module 31, it is quick to increase
Beneficial controlling cycle is short, and control gain is lowered and is not saturated with protection signal, and slow gain controlling cycle is long,
Control gain raises to obtain more preferable signal quality.Both combine and can cause to receive signal unsaturation
On the premise of be as far as possible close to and target power so that cell search algorithms obtain good performance.
Preferred embodiments of the present invention are these are only, embodiments of the present invention and protection is not thereby limited
Scope, to those skilled in the art, should can appreciate that all utilization description of the invention and figure
Show the equivalent done by content and the scheme obtained by obvious change, should be included in this
In the protection domain of invention.
Claims (16)
1. a kind of auto gain control method, it is characterised in that including obtaining the step of lowering gain error：
Step 1, one first power statistic module count the first reception in a cycle very first time statistical length
Average power signal, one second power statistic module count second in one second time cycle statistical length
Average power signal is received, the cycle very first time statistical length was counted less than second time cycle
Length；
Step 2, carries out mathematic interpolation to the described first reception average power signal and a first object power,
Gain error is lowered to obtain；
Whether step 3, judge the downward gain error less than 0, if it is, selecting the downward gain
Error is used for the gain for adjusting radio frequency amplifier, then re-executes step 1.
2. auto gain control method according to claim 1, it is characterised in that also including acquisition
The step of raising gain error, when lowering gain error more than or equal to 0 described in the step 3, holds
Row following steps：
Step 4, obtains described second and receives average power signal, and receive signal averaging to described second
Power and one second target power carry out mathematic interpolation, to obtain rise gain error；
Step 5, according to the previous cycle it is calculated it is smooth after gain error the rise gain is missed
Difference is smoothed, to obtain the rise gain error after smoothing；
Whether step 6, judge the rise gain error after described smoothing more than 0, if it is, selecting described
Rise gain error after smooth is used for the gain for adjusting the radio frequency amplifier.
3. auto gain control method according to claim 1, it is characterised in that the step 1
In, the first reception average power signal is prepared by the following：
Wherein, PshortAverage power signal is received for first；Nshort
For cycle very first time statistical length；I (n) is the real part for receiving signal；Q (n) is the imaginary part for receiving signal.
4. auto gain control method according to claim 1, it is characterised in that the step 1
In, the second reception average power signal is prepared by the following：
Wherein, PlongAverage power signal is received for second；NlongFor
Second time cycle statistical length；I (n) is the real part for receiving signal；Q (n) is the imaginary part for receiving signal.
5. auto gain control method according to claim 1, it is characterised in that the step 2
In, the described first reception average power signal and the target power are transformed into behind decibel domain and carry out difference
Computing, the downward gain error in the decibel domain for obtaining is：
Wherein, GdownFor the downward gain error in decibel domain；For conversion
To the first reception average power signal in decibel domain；To be transformed into the target power in decibel domain.
6. auto gain control method according to claim 2, it is characterised in that the step 4
In, the described second reception average power signal and the target power are transformed into behind decibel domain and carry out difference
Computing, the rise gain error in the decibel domain for obtaining is：
Wherein, GupFor the rise gain error in decibel domain；To be transformed into point
The second reception average power signal in shellfish domain；To be transformed into the target power in decibel domain.
7. auto gain control method according to claim 2, it is characterised in that the step 3
In, before re-executing step 1, the power statistic that average power signal is received to described second resets,
And the rise gain error after described smoothing is reset.
8. auto gain control method according to claim 6, it is characterised in that the step 5
In, it is described it is smooth after rise gain error be prepared by the following：
Wherein,For the rise gain error after smoothing；GupFor the rise gain error in decibel domain；αlong
For smoothing factor, value is 1/2,1/4 ..., 1/32；Obtain for previous second setting time computation of Period
It is smooth after rise gain error.
9. auto gain control method according to claim 1, it is characterised in that when described first
Between cycle statistical length be 1/4, or 1/2 or 1 OFDM symbol.
10. auto gain control method according to claim 1, it is characterised in that when described second
Between cycle statistical length be 2 times or 4 times or 8 times of the cycle very first time statistical length, it is and not little
In 1 OFDM symbol length.
11. auto gain control methods according to claim 2, it is characterised in that first mesh
Mark power is higher than second target power.
12. a kind of AGC systems, it is characterised in that be connected in the backfeed loop of a receiver,
Including：
First power statistic module, for counting the first reception letter in a cycle very first time statistical length
Number mean power；
Second power statistic module, for counting the second reception letter in one second time cycle statistical length
Number mean power；
Gain error computing module is lowered, is connected with the first power statistic module, is connect to described first
Receiving average power signal and a first object power carries out mathematic interpolation, to obtain downward gain error；
Gain error computing module is raised, is connected with the second power statistic module, is connect to described second
Receiving average power signal and one second target power carries out mathematic interpolation, to obtain rise gain error.
Gain error selecting module, respectively with the downward gain error computing module and the rise gain
Error calculating module connects, and whether is less than 0 or the comparison rise for the comparison downward gain error
Whether gain error is more than 0, to select corresponding gain error, the gain error to be used to adjust described
The gain of the radio frequency amplifier of receiver.
13. AGC systems according to claim 12, it is characterised in that also including point
Shellfish domain modular converter,
It is connected between the first power statistic module and the downward gain error computing module, is used for
Described first reception average power signal and the first object power are transformed into into a decibel domain；
And/or,
It is connected between the second power statistic module and the rise gain error computing module, is used for
Described second reception average power signal and second target power are transformed into into a decibel domain.
14. AGC systems according to claim 12, it is characterised in that also including flat
Sliding processing module, is connected between the gain error selecting module and the rise gain error module,
For being smoothed the rise gain error with the rise gain error after being smoothed.
15. AGC systems according to claim 12, it is characterised in that described first
Time cycle statistical length is 1/4, or 1/2 or 1 OFDM symbol.
16. AGC systems according to claim 15, it is characterised in that described second
Time cycle statistical length is 2 times of the cycle very first time statistical length or 4 times or 8 times, and not
Less than 1 OFDM symbol length.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107948110A (en) * | 2017-11-27 | 2018-04-20 | 南京雷行信息技术有限公司 | It is a kind of based on synchronous AGC Method in LTE system |
| CN112866162A (en) * | 2021-01-05 | 2021-05-28 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Automatic gain control method, system and medium based on time domain and frequency domain power |
| WO2022062993A1 (en) * | 2020-09-22 | 2022-03-31 | 紫光展锐(重庆)科技有限公司 | Gain parameter adjusting method and apparatus, and device |
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| CN112866162B (en) * | 2021-01-05 | 2022-05-31 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Automatic gain control method, system and medium based on time domain and frequency domain power |
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