CN107147368A - The gain adjusting method and device of gain amplifier - Google Patents
The gain adjusting method and device of gain amplifier Download PDFInfo
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- CN107147368A CN107147368A CN201710258449.1A CN201710258449A CN107147368A CN 107147368 A CN107147368 A CN 107147368A CN 201710258449 A CN201710258449 A CN 201710258449A CN 107147368 A CN107147368 A CN 107147368A
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- gain
- power
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- amplifier
- target
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
Abstract
The embodiment of the present invention provides a kind of gain adjusting method and device of gain amplifier.This method includes：If the signal power exported using initial gain is more than the interval higher limit of predetermined power, the least gain of gain amplifier is regard as target gain；If signal power is less than the interval lower limit of predetermined power, the maximum gain of gain amplifier is regard as target gain；Searched from gain map table and change in gain amount is the power regulation factor corresponding to target gain and the difference of initial gain；If signal power and the product of power regulation factor are in predetermined power is interval, it is the change in gain amount corresponding to the ratio between sum of products target power to be searched from gain map table with power regulation factor；By the current gain of gain amplifier be adjusted to initial gain and change in gain amount and, and then solve the problem of existing AGC convergence rates are slow.
Description
Technical field
The present embodiments relate to the gain adjusting method and dress of gain control, more particularly to a kind of gain amplifier
Put.
Background technology
When AM receiver receives radio signals, because each transmitting station power varies, transmitting station is from receiver
Distance differs, the reason such as the multipath effect during radio propagation and decline, and make to induct on reception antenna is useful
Signal intensity difference is very greatly different, and often has very big fluctuations, it is possible to cause some when receiving small-signal
Circuit (such as wave detector) cisco unity malfunction and lossing signal, and cause the obstruction of amplifying circuit (non-when receiving strong signal
Linear distortion).For this in receiving device almost it is without exception all must using (Automatic Gain Control, automatically
Gain is controlled) agc circuit, for being compressed with the excursion with signal intensity.
Existing automatic gain control circuit include gain amplifier, AGC wave detectors and a series of wave filter groups into.In reality
Border is in use, when the signal of input is larger, AGC wave detectors are exported becomes big to the signal of amplifier so that the gain of amplifier
Reduce, to reduce the signal intensity of output signal.When the signal of input is smaller, AGC wave detectors export the signal to amplifier
Diminish so that the gain increase of amplifier, to increase the signal intensity of output signal, and then cause the input signal of varying strength
Corresponding output signal keeps stable.
Existing agc circuit is the feedback control loop of a standard, and whole system is a continuous tracking process, and is gradually
Enter regulation, in order to ensure enough stabilizations and suppression noise ability, the low bandwidth characteristic of loop also determines whole tracking simultaneously
Stable process is slower.It follows that existing AGC is not suitable for some communication fields, such as BLE (Bluetooth Low
Energy, bluetooth low energy consumption) in data transfer, due to lead code (lead code is one group of bit group positioned at packet section start,
Recipient can be synchronized upon and prepare to receive actual data) it is very short, do not complete AGC's also within this period of lead code
Regulation, the problem of in turn resulting in signal intensity, influence receptivity.
The content of the invention
The embodiment of the present invention provides a kind of gain adjusting method and device of gain amplifier, for solving existing AGC
The problem of convergence rate is slow.
In a first aspect, the embodiment of the present invention provides a kind of gain adjusting method of gain amplifier, including：
If the signal power exported using initial gain is more than the interval higher limit of predetermined power, by gain amplifier
Least gain is used as target gain；If the signal power is less than the interval lower limit of predetermined power, by gain amplifier
Maximum gain is used as target gain；
Searched from gain map table and change in gain amount is adjusted for the power corresponding to target gain and the difference of initial gain
Integral coefficient；
If the signal power and the product of the power regulation factor are interval interior in predetermined power, from gain map table
Middle lookup and the change in gain amount that power regulation factor is corresponding to the ratio between described sum of products target power；The target power is
Any power in the interval subinterval of predetermined power；
By the current gain of gain amplifier be adjusted to initial gain and the change in gain amount and.
In a kind of possible implementation of first aspect, the predetermined power interval is and the gain amplifier
Power interval corresponding to the sampled voltage interval of the functional module of output end connection, the subinterval is the functional module
Expect the power interval corresponding to sampled voltage interval.
In the alternatively possible implementation of first aspect, methods described also includes：
If the product in the predetermined power is interval, does not increase the least gain of the gain amplifier and most
The average value of benefit is as target gain, and it is target gain and first to be searched again with change in gain amount from the gain map table
Power regulation factor corresponding to the difference of beginning gain.
In the alternatively possible implementation of first aspect, if the signal power is in the subinterval, to institute
The initial gain for stating gain amplifier does not adjust；
If the signal power is not in the subinterval, and the signal power belongs to the predetermined power interval, then
It is the change in gain corresponding to the ratio between the signal power and target power to be searched from gain map table with power regulation factor
Amount.
In the alternatively possible implementation of first aspect, in the gain map table two neighboring change in gain amount it
Between difference be 3dB.
In the alternatively possible implementation of first aspect, if the signal power exported using initial gain is more than
The interval higher limit of predetermined power, then specifically include the least gain of gain amplifier as target gain：
Whether if the signal power is more than the interval higher limit of the predetermined power, it is institute to judge the initial gain
State the least gain of gain amplifier；
If it is not, then regarding the least gain of the gain amplifier as the target gain；
If the signal power is less than the interval lower limit of predetermined power, the maximum gain of gain amplifier is made
For target gain, specifically include：
Whether if the signal power is less than the interval lower limit of the predetermined power, it is institute to judge the initial gain
State the maximum gain of gain amplifier；
If it is not, then regarding the maximum gain of the gain amplifier as the target gain.
In the alternatively possible implementation of first aspect, the signal power is the gain amplifier in unit
The average value of the power exported in long using initial gain.
Second aspect, the embodiment of the present invention provides a kind of gain regulator of gain amplifier, including：
Target gain determining module, for being more than predetermined power interval in the signal power exported using initial gain
During limit value, the least gain of gain amplifier is regard as target gain；And it is less than predetermined power interval in the signal power
Lower limit when, regard the maximum gain of gain amplifier as target gain；
Power regulation factor searching modul, is target gain and first for being searched from gain map table with change in gain amount
Power regulation factor corresponding to the difference of beginning gain；
Change in gain amount searching modul, for the product in the signal power and the power regulation factor in default work(
When in rate is interval, it is the increasing corresponding to the ratio between described sum of products target power to be searched from gain map table with power regulation factor
Beneficial variable quantity；The target power is any power in the interval subinterval of predetermined power；
Gain regulation module, for the current gain of gain amplifier to be adjusted into initial gain and the change in gain amount
Sum.
In a kind of possible implementation of second aspect, the predetermined power interval is defeated with the gain amplifier
Power interval corresponding to the sampled voltage interval for the functional module for going out end connection, the subinterval is the phase of the functional module
Hope the power interval corresponding to sampled voltage interval.
In the alternatively possible implementation of second aspect, the change in gain amount searching modul is additionally operable to described
When product is not in the predetermined power is interval, using the least gain of the gain amplifier and the average value of maximum gain as
Target gain, and call the power regulation factor searching modul.
In the alternatively possible implementation of second aspect, the gain regulation module is additionally operable in the signal work(
Rate does not adjust then in the subinterval to the initial gain of the gain amplifier；
The change in gain amount searching modul, is additionally operable in the signal power not in the subinterval, and the letter
Number power belong to the predetermined power it is interval when, searched from gain map table with power regulation factor be the signal power and
Change in gain amount corresponding to the ratio between target power.
In the alternatively possible implementation of second aspect, in the gain map table two neighboring change in gain amount it
Between difference be 3dB.
In the alternatively possible implementation of second aspect, the target gain determining module includes judging unit and true
Order member, is specifically included：
The judging unit, for when the signal power is more than the interval higher limit of the predetermined power, judging institute
State initial gain whether be the gain amplifier least gain；
The determining module, for the judge module judge the initial gain be not the gain amplifier most
During small gain, the least gain of the gain amplifier is regard as the target gain；
The judging unit, is additionally operable to be less than the interval lower limit of the predetermined power in the signal power, then judges
The initial gain whether be the gain amplifier maximum gain；
The determining module, for the judge module judge the initial gain be not the gain amplifier most
Large gain, regard the maximum gain of the gain amplifier as the target gain.
In the alternatively possible implementation of second aspect, the signal power is the gain amplifier in unit
The average value of the power exported in long using initial gain.
The gain adjusting method and device of gain amplifier provided in an embodiment of the present invention, obtain gain amplifier and exist first
The signal power exported under initial gain, if the signal power is more than the interval higher limit of predetermined power, by gain amplifier
Least gain as target gain, if the signal power is less than the interval lower limit of predetermined power, by gain amplifier
Maximum gain is as target gain, and it is above-mentioned target gain and initial gain to be searched from gain map table with change in gain amount
Difference corresponding to power regulation factor.Then, the signal power and the product of power regulation factor are obtained, and is existed in the product
When in predetermined power is interval, it is corresponding to the ratio between sum of products target power to be searched from gain map table with power regulation factor
Change in gain amount so that the current gain of gain amplifier be adjusted to initial gain and the change in gain amount and.This implementation
The method of example, has quickly determined the change in gain amount of gain amplifier, and then solve existing by the exploration of limited number of time
The problem of AGC module convergence rates are slow, so as to improve the reception reliability and stability of signal.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The schematic flow sheet of the gain adjusting method embodiment one for the gain amplifier that Fig. 1 provides for the present invention；
The application scenario diagram of the gain adjusting method for the gain amplifier that Fig. 1 a provide for the present invention；
The schematic flow sheet of the gain adjusting method embodiment two for the gain amplifier that Fig. 2 provides for the present invention；
The schematic flow sheet of the gain adjusting method embodiment three for the gain amplifier that Fig. 3 provides for the present invention；
The structural representation for the gain regulator embodiment one that Fig. 4 provides for the present invention；
The structural representation for the gain regulator embodiment two that Fig. 5 provides for the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In actual applications, it is sometimes desirable to complete gain control in a short period of time so that the functional module such as ADC can be with
The signal of suitable amplitude and maximum signal to noise ratio is sampled, being at this moment accomplished by one can be with the AGC of Fast Convergent, it is ensured that connect in data
Will not it not stablize also because of AGC during receipts, the problem of causing signal intensity, influence receptivity.But existing AGC convergences
Speed is slow, it is impossible to meet above-mentioned requirements, and the gain adjusting method of gain amplifier provided in an embodiment of the present invention passes through limited number of time
Exploration quickly determined the change in gain amount of gain amplifier, and then solve the problem of AGC convergence rates are slow.
Technical scheme is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and may be repeated no more for same or analogous concept or process in some embodiments.
The schematic flow sheet of the gain adjusting method embodiment one for the gain amplifier that Fig. 1 provides for the present invention.This implementation
Example executive agent be gain regulator, the gain regulator can be processor a part or individually
Device.The present embodiment refers to the detailed process of the quick adjust gain amplifier gain of gain regulator.As shown in figure 1,
The method of the present embodiment can include：
If S101, the signal power exported using initial gain are more than the interval higher limit of predetermined power, gain is put
The least gain of big device is used as target gain；If the signal power is less than the interval lower limit of predetermined power, gain is put
The maximum gain of big device is used as target gain.
It should be noted that the corresponding gain ranging of different types of gain amplifier is different, when gain amplifier is selected
Afterwards, the gain ranging of the gain amplifier is also determined.
Specifically, the gain of the corresponding gain amplifier of current sample time is initial gain, input gain amplifier
Initial signal signal intensity in the presence of the initial gain changes, intensity change after signal from the defeated of gain amplifier
Go out end output.Gain regulator obtains the signal power of current time gain amplifier output end output.
Because the signal that gain amplifier is exported is analog signal, therefore, above-mentioned signal power can be analog signal
The computational methods of the power of power or the data signal after conversion, wherein signal power are prior art, herein
Repeat no more.
The signal of above-mentioned gain amplifier output can be signal or two paths of signals, such as I signal and Q all the way
Signal (wherein, I signal and Q signal are two-way normal orthogonal signal conventional in digital communication system).Optionally, gain is amplified
The signal of device output can also be the signal of other forms, and the present embodiment is without limitation.
When the signal that gain amplifier is exported is I signal and Q signal, then the first power of the two paths of signals can basis
Formula Ps=II+QQ is obtained.
Optionally, in order to improve obtain signal power accuracy, the signal power of the present embodiment can be the gain
The average value for the power that amplifier is exported in unit time using initial gain.For example, sample frequency is 2s, unit time is
10s, then include 5 sampled points in unit time, and gain amplifier is exported using initial gain on this 5 sampled points
The average value of power is used as the signal power.
In order to realize the quick adjustment to gain amplifier gain, gain regulator is by the signal power of acquisition with presetting
The boundary value of power interval is compared, and judges whether the signal power is located at predetermined power interval interior.If it is determined that signal power
The higher limit interval more than predetermined power, then regard the least gain of gain amplifier as target gain, however, it is determined that signal power
The lower limit interval less than predetermined power, then regard the maximum gain of gain amplifier as target gain.So that Gain tuning is filled
Put and signal power is adjusted using the target gain.
In a kind of possible implementation of the present embodiment, if the signal power in above-mentioned S101 is more than predetermined power area
Between higher limit, then can be specifically as target gain using the least gain of gain amplifier：If the signal power is big
In the higher limit that the predetermined power is interval, then judge the initial gain whether be the gain amplifier least gain,
If it is not, then regarding the least gain of the gain amplifier as the target gain.
Specifically, gain regulator determines that signal power is more than after the interval higher limit of predetermined power, in addition it is also necessary to it is determined that
Now the initial gain of gain amplifier whether be gain amplifier least gain, if it is not, then by the minimum of gain amplifier
Gain is used as target gain.If it is determined that now the initial gain of gain amplifier is the least gain of gain amplifier, then illustrate
The now gain of gain amplifier has been adjusted to minimum, but the reception of the signal of output still beyond follow-up function module
Scope, such a situation is not belonging to the limit of consideration of the present embodiment.
If the signal power in above-mentioned S101 is less than the interval lower limit of predetermined power, by gain amplifier most
Large gain can be specifically as target gain：If the signal power is less than the interval lower limit of the predetermined power, sentence
Break the initial gain whether be the gain amplifier maximum gain, if it is not, then most increasing the gain amplifier
Benefit is used as the target gain.
Specifically, when gain regulator determines that signal power is less than predetermined power interval lower limit, in addition it is also necessary to it is determined that
Now the initial gain of gain amplifier whether be gain amplifier maximum gain, if it is not, then by the maximum of gain amplifier
Gain is used as target gain.If judge the initial gain of now gain amplifier as gain amplifier maximum gain when, explanation
The gain of gain amplifier has been adjusted to maximum, but the reception model of the signal of output still beyond follow-up function module
Enclose, such a situation is not belonging to the limit of consideration of the present embodiment.
S102, search from gain map table and the work(corresponding to difference that change in gain amount is target gain and initial gain
Rate regulation coefficient.
The gain map table of the present embodiment preserves the corresponding relation between change in gain amount and power regulation factor.Wherein
Power regulation factor is the multiple of power amplification or diminution.For example, according to the S101 target gains obtained and gain amplifier
Initial gain difference, i.e., when the change in gain amount of the two is 3dB, the corresponding power of 3dB is found from gain map table and is adjusted
Integral coefficient is 2；When change in gain amount is -3dB, it is 1/2 that the corresponding power regulation factors of -3dB are found from gain map table；
When change in gain amount is 6dB, it is 4 that the corresponding power regulation factors of 6dB are found from gain map table；Change in gain amount for-
During 6dB, it is 1/4 that the corresponding power regulation factors of -6dB are found from gain map table.
Alternatively, the change in gain amount in gain map table is (3*N) dB, wherein, N is the integer more than or equal to 2.
If S103, the signal power and the product of the power regulation factor are interval interior in predetermined power, from gain
It is the change in gain amount corresponding to the ratio between described sum of products target power to be searched in mapping table with power regulation factor；The target
Power is any power in the interval subinterval of predetermined power.
S104, the current gain of gain amplifier is adjusted to initial gain and the change in gain amount and.
Specifically, gain regulator adjusts signal power using the power regulation factor of above-mentioned acquisition, that is, calculate letter
The product of number power and power regulation factor, and judge the product whether in above-mentioned predetermined power is interval.If the product exists
In predetermined power is interval, then illustrate the adjustment success to signal power.
A target power is determined from the interval subinterval of above-mentioned predetermined power in the present embodiment, above-mentioned acquisition is calculated
Product and the ratio of the target power, the ratio is power regulation factor.Then, the ratio is obtained from gain map table
(i.e. power regulation factor) corresponding change in gain amount.The current gain of gain amplifier is adjusted to initial gain and the gain
The sum of variable quantity, and then realize the quick adjustment to gain amplifier gain.
The gain adjusting method of gain amplifier provided in an embodiment of the present invention, obtains gain amplifier and is initially increasing first
The signal power of the lower output of benefit, if the signal power is more than the interval higher limit of predetermined power, by the minimum of gain amplifier
Gain is as target gain, if the signal power is less than the interval lower limit of predetermined power, by most increasing for gain amplifier
Benefit as target gain, and from gain map table search and change in gain amount be above-mentioned target gain and the difference of initial gain institute
Corresponding power regulation factor.Then, the signal power and the product of power regulation factor are obtained, and in the product in default work(
When in rate is interval, searches and become with power regulation factor for the gain corresponding to the ratio between sum of products target power from gain map table
Change amount so that the current gain of gain amplifier be adjusted to initial gain and the change in gain amount and.The side of the present embodiment
Method, has quickly determined the change in gain amount of gain amplifier, and then solve existing AGC modules by the exploration of limited number of time
The problem of convergence rate is slow, so as to improve the reception reliability and stability of signal.
In a kind of possible implementation of the embodiment of the present invention, the gain for the gain amplifier that Fig. 1 a provide for the present invention
The application scenario diagram of method of adjustment.As shown in Figure 1a, gain amplifier is connected with gain regulator and functional module respectively, should
Functional module can be ADC (Analog-to-Digital Converter, analog-digital converter) or AGC detection modules etc..Increase
Beneficial amplifier is used to zoom in or out to the signal of input, and gain regulator is located at the feedback branch of gain amplifier
On.
In the application scenarios shown in Fig. 1 a, then above-mentioned predetermined power interval is to be connected with the output end of the gain amplifier
Functional module sampled voltage interval corresponding to power interval, the subinterval for the functional module expectation sampling electricity
Corresponding power interval between nip.
Assuming that the functional module being connected with gain amplifier is ADC, then the sampled voltage area that predetermined power interval is ADC
Between corresponding power interval, because ADC models are different, therefore its corresponding power interval is also different, and corresponding subinterval is not yet
It is identical.
When the signal power that gain amplifier is exported is interval interior not in predetermined power, then illustrate the letter of gain amplifier output
Number it can not be collected or can not completely be collected by functional module by follow-up functional module, and then influence the reception effect of signal
Really.Accordingly, it would be desirable to which the gain to gain amplifier is adjusted so that the signal of gain amplifier output falls in functional module
In range of receiving.Further, in order to improve the reception of the signal that functional module exports gain amplifier, then need to make
The signal power for obtaining gain amplifier output falls in the corresponding subinterval of expectation sampled voltage of functional module, and then realizes letter
Number efficient reception.
The schematic flow sheet of the gain adjusting method embodiment two for the gain amplifier that Fig. 2 provides for the present invention.Above-mentioned
On the basis of embodiment, as shown in Fig. 2 the method for the present embodiment can include：
If S201, the signal power exported using initial gain are more than the interval higher limit of predetermined power, gain is put
The least gain of big device is used as target gain；If the signal power is less than the interval lower limit of predetermined power, gain is put
The maximum gain of big device is used as target gain.
S202, search from gain map table and the work(corresponding to difference that change in gain amount is target gain and initial gain
Rate regulation coefficient.
S203, judge whether the product of the signal power and the power regulation factor is interval in the predetermined power
It is interior.
If in the step of performing S204-S205, if the step of otherwise performing S206.
S204, to be searched from gain map table with power regulation factor be corresponding to the ratio between described sum of products target power
Change in gain amount.
S205, the current gain of gain amplifier is adjusted to initial gain and the change in gain amount and.
S206, using the least gain of the gain amplifier and the average value of maximum gain as target gain, and return
Step S202.
Specifically, the power regulation factor that gain regulator is obtained using above-mentioned S202 makees product with signal power, obtain
Product it is not interval in predetermined power, then illustrate that the target gain determined according to above-mentioned S201 is inaccurate.For example, S201 will increase
The least gain of beneficial amplifier is as target gain, and the product determined according to the least gain has exceeded predetermined power interval again
Lower limit, illustrates that target gain is set too small.So, being averaged the least gain of gain amplifier and maximum gain
Value as target gain, and from gain map table again search and change in gain amount be target gain and the difference of initial gain institute
Corresponding power regulation factor.Then the step of performing above-mentioned S203, determines to perform S204 when product is in predetermined power is interval
And the step of S205.
For example, predetermined power interval is [10mW, 160mW], signal power is 8mW, the initial gain of gain amplifier for-
3dB, the adjustable gain adjusting range of gain amplifier is [- 12dB, 12dB].Target gain is determined according to above-mentioned S201 method
For 12dB, change in gain amount is 15dB.From gain map
The corresponding power regulation factors of change in gain amount 15dB are found in table isThe signal being achieved in that
The product of power and the power regulation factor is 256mW.But product 256mW is more than the interval higher limit of predetermined power
160mW.So, gain regulator can be by the median of the adjustable gain adjusting range [- 12dB, 12dB] of gain amplifier
0dB is as target gain, and the product 16mW calculated according to the above method belongs to predetermined power interval, then performs above-mentioned S204
And the step of S205.
The schematic flow sheet of the gain adjusting method embodiment three for the gain amplifier that Fig. 3 provides for the present invention.Above-mentioned
On the basis of embodiment, as shown in figure 3, the method for the present embodiment can include：
S301, judge signal power whether in the subinterval.
If so, the step of then performing S302, if it is not, the step of then performing S303 and S304.
S302, the initial gain to the gain amplifier do not adjust.
I.e. gain amplifier determines signal power in the subinterval of functional module, illustrates now gain amplifier output
Signal can well be received by functional module, it is not necessary to the initial gain of current time gain amplifier is adjusted again
It is whole.
If it is interval that S303, the signal power belong to the predetermined power, search and adjusted with power from gain map table
Integral coefficient is the change in gain amount corresponding to the ratio between the signal power and target power.
S304, the current gain of gain amplifier is adjusted to initial gain and the change in gain amount and.
Now, when the signal power of gain amplifier output is not in subinterval, but in predetermined power is interval, this is illustrated
When gain amplifier output signal power not in the interval corresponding power interval of expectation sampled voltage of functional module, because
This, is once adjusted to signal power now, is adjusted in subinterval.
Specifically, gain regulator obtains the ratio between signal power and target power, and the ratio is adjusted as power
Coefficient, obtains the corresponding change in gain amount of the power regulation factor from gain map table.Then the step of performing S304, will
The current gain of gain amplifier be adjusted to initial gain and the change in gain amount and.
The gain adjusting method of gain amplifier provided in an embodiment of the present invention, be by being adjusted to signal power and power
Several products is not in the interval situation of predetermined power, and signal power is in subinterval or signal power is not in subinterval
But the situation in predetermined power interval is analyzed respectively, and then realize in varied situations to gain amplifier gain conversion
The quick determination of value, so as to expand the use scope of the present embodiment method.
The structural representation of the gain regulator embodiment one for the gain amplifier that Fig. 4 provides for the present invention.The gain
Adjusting apparatus can be realized by way of software, hardware or soft or hard combination, can turn into some or all of of processor.
As shown in figure 4, the gain regulator of the present embodiment can include：
Target gain determining module 10, for being more than predetermined power interval in the signal power exported using initial gain
During higher limit, the least gain of gain amplifier is regard as target gain；And it is less than predetermined power area in the signal power
Between lower limit when, regard the maximum gain of gain amplifier as target gain.
Power regulation factor searching modul 20, for from gain map table search with change in gain amount be target gain and
Power regulation factor corresponding to the difference of initial gain.
Change in gain amount searching modul 30, for the product in the signal power and the power regulation factor default
When in power interval, it is corresponding to the ratio between described sum of products target power to be searched from gain map table with power regulation factor
Change in gain amount；The target power is any power in the interval subinterval of predetermined power.
Gain regulation module 40, for the current gain of gain amplifier to be adjusted into initial gain and the change in gain
The sum of amount.
The gain regulator of the gain amplifier of the present embodiment, can be used for the skill for performing above-mentioned shown embodiment of the method
Art scheme, its implementing principle and technical effect are similar, and here is omitted.
In a kind of possible implementation of the embodiment of the present invention, above-mentioned predetermined power interval is to amplify with the gain
Power interval corresponding to the sampled voltage interval of the functional module of the output end connection of device, the subinterval is the function mould
The power interval expected corresponding to sampled voltage interval of block.
Change in gain amount searching modul 30, is additionally operable to when the product is not in the predetermined power is interval, will be described
The least gain of gain amplifier and the average value of maximum gain call power regulation factor searching modul as target gain
20。
In the alternatively possible implementation of the embodiment of the present invention, above-mentioned gain regulation module 40 is additionally operable in institute
Signal power is stated in the subinterval, then the initial gain of the gain amplifier is not adjusted.
Change in gain amount searching modul 30, is additionally operable in the signal power not in the subinterval, and the signal
When power belongs to the predetermined power interval, it is the signal power and mesh to be searched from gain map table with power regulation factor
Mark the change in gain amount corresponding to power ratio.
Optionally, the difference in above-mentioned gain map table between two neighboring change in gain amount is 3dB.
The gain regulator of the gain amplifier of the present embodiment, can be used for the skill for performing above-mentioned shown embodiment of the method
Art scheme, its implementing principle and technical effect are similar, and here is omitted.
The structural representation of the gain regulator embodiment two for the gain amplifier that Fig. 5 provides for the present invention.Above-mentioned
On the basis of embodiment, the target gain determining module 10 of the present embodiment includes judging unit 101 and determining unit 102：
Judging unit 101, for when the signal power is more than the interval higher limit of the predetermined power, judging described
Initial gain whether be the gain amplifier least gain.
Determining unit 102, for judging that the initial gain is not the minimum of the gain amplifier in judging unit 101
During gain, the least gain of the gain amplifier is regard as the target gain.
Judging unit 101, is additionally operable to be less than the interval lower limit of the predetermined power in the signal power, then judges institute
State initial gain whether be the gain amplifier maximum gain.
Determining unit 102, for judging that the initial gain is not the maximum of the gain amplifier in judging unit 101
During gain, the maximum gain of the gain amplifier is regard as the target gain.
Optionally, above-mentioned signal power is the power that the gain amplifier is exported in unit time using initial gain
Average value.
The gain regulator of the gain amplifier of the present embodiment, can be used for the skill for performing above-mentioned shown embodiment of the method
Art scheme, its implementing principle and technical effect are similar, and here is omitted.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of gain adjusting method of gain amplifier, it is characterised in that including：
If the signal power exported using initial gain is more than the interval higher limit of predetermined power, by the minimum of gain amplifier
Gain is used as target gain；If the signal power is less than the interval lower limit of predetermined power, by the maximum of gain amplifier
Gain is used as target gain；
Searched from gain map table and change in gain amount is for the power adjustment corresponding to target gain and the difference of initial gain
Number；
If the signal power and the product of the power regulation factor are interval interior in predetermined power, looked into from gain map table
It is the change in gain amount corresponding to the ratio between described sum of products target power to look for power regulation factor；The target power is default
Any power in the subinterval of power interval；
By the current gain of gain amplifier be adjusted to initial gain and the change in gain amount and.
2. according to the method described in claim 1, it is characterised in that the predetermined power interval is and the gain amplifier
Power interval corresponding to the sampled voltage interval of the functional module of output end connection, the subinterval is the functional module
Expect the power interval corresponding to sampled voltage interval.
3. according to the method described in claim 1, it is characterised in that methods described also includes：
If the product is not in the predetermined power is interval, by the least gain of the gain amplifier and maximum gain
Average value is as target gain, and it is target gain and initial increasing to be searched again with change in gain amount from the gain map table
Power regulation factor corresponding to the difference of benefit.
4. according to the method described in claim 1, it is characterised in that methods described also includes：
If the signal power is in the subinterval, the initial gain of the gain amplifier is not adjusted；
If the signal power is not in the subinterval, and the signal power belongs to the predetermined power interval, then from increasing
It is the change in gain amount corresponding to the ratio between the signal power and target power to be searched in beneficial mapping table with power regulation factor.
5. the method according to claim any one of 1-4, it is characterised in that two neighboring gain in the gain map table
Difference between variable quantity is 3dB.
6. according to the method described in claim 1, it is characterised in that if the signal power exported using initial gain is more than
The interval higher limit of predetermined power, then specifically include the least gain of gain amplifier as target gain：
Whether if the signal power is more than the interval higher limit of the predetermined power, it is the increasing to judge the initial gain
The least gain of beneficial amplifier；
If it is not, then regarding the least gain of the gain amplifier as the target gain；
If the signal power is less than the interval lower limit of predetermined power, the maximum gain of gain amplifier is regard as mesh
Gain is marked, is specifically included：
Whether if the signal power is less than the interval lower limit of the predetermined power, it is the increasing to judge the initial gain
The maximum gain of beneficial amplifier；
If it is not, then regarding the maximum gain of the gain amplifier as the target gain.
7. according to the method described in claim 1, it is characterised in that the signal power is the gain amplifier in unit
The average value of the power exported in long using initial gain.
8. a kind of gain regulator of gain amplifier, it is characterised in that including：
Target gain determining module, for being more than the interval higher limit of predetermined power in the signal power exported using initial gain
When, it regard the least gain of gain amplifier as target gain；And be less than in the signal power under predetermined power interval
During limit value, the maximum gain of gain amplifier is regard as target gain；
Power regulation factor searching modul, is target gain and initial increasing for being searched from gain map table with change in gain amount
Power regulation factor corresponding to the difference of benefit；
Change in gain amount searching modul, for the product in the signal power and the power regulation factor in predetermined power area
When interior, search and become with power regulation factor for the gain corresponding to the ratio between described sum of products target power from gain map table
Change amount；The target power is any power in the interval subinterval of predetermined power；
Gain regulation module, for the current gain of gain amplifier to be adjusted into initial gain and the change in gain amount
With.
9. device according to claim 8, it is characterised in that the predetermined power interval is and the gain amplifier
Power interval corresponding to the sampled voltage interval of the functional module of output end connection, the subinterval is the functional module
Expect the power interval corresponding to sampled voltage interval.
10. device according to claim 8, it is characterised in that the change in gain amount searching modul, is additionally operable to described
When product is not in the predetermined power is interval, using the least gain of the gain amplifier and the average value of maximum gain as
Target gain, and call the power regulation factor searching modul.
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| CN110391834A (en) * | 2019-07-22 | 2019-10-29 | 展讯通信（上海）有限公司 | Gain adjusting method, device, trunking and storage medium |
| CN111478710A (en) * | 2020-04-09 | 2020-07-31 | 展讯通信（上海）有限公司 | Method and system for suppressing adjacent channel interference, receiver and communication system |
| CN113473588A (en) * | 2020-03-31 | 2021-10-01 | 广州海格通信集团股份有限公司 | Communication signal processing method, communication signal processing apparatus, computer device, and storage medium |
| CN114828187A (en) * | 2022-04-08 | 2022-07-29 | Oppo广东移动通信有限公司 | Method for adjusting power of electronic equipment, electronic equipment and storage medium |
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