CN105450317B - A kind of AGC calibration systems and method and mobile terminal - Google Patents
A kind of AGC calibration systems and method and mobile terminal Download PDFInfo
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- CN105450317B CN105450317B CN201410374613.1A CN201410374613A CN105450317B CN 105450317 B CN105450317 B CN 105450317B CN 201410374613 A CN201410374613 A CN 201410374613A CN 105450317 B CN105450317 B CN 105450317B
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Abstract
The invention discloses a kind of AGC calibration systems and method and mobile terminal, belongs to receiver gain collimation technique field；System includes receiving unit, and in a default frequency acceptance band, radiofrequency signal is received according to a default receiving power；Gain calibration unit, receiving unit is connected, wherein being preset with multiple reception gains；First computing unit, connect gain calibration unit；Memory cell, connection signal intensity calculate unit；Second computing unit, memory cell and gain calibration unit are connected respectively；Method includes：All frequencies are calibrated using initial reception gain first, and the received signal strength difference being calculated between adjacent frequency；Then change reception gain, each frequency is calibrated respectively, and the received signal strength of remaining frequency under the reception gain is obtained according to received signal strength mathematic interpolation.The beneficial effect of above-mentioned technical proposal is：Ensure to shorten prover time on the basis of calibration accuracy, improve calibration efficiency.
Description
Technical field
The present invention relates to receiver gain collimation technique field, more particularly to a kind of AGC calibration systems and method and shifting
Dynamic terminal.
Background technology
Automatic growth control (Auto Gain Control, AGC), that is, usually said AGC calibrations, are to make amplification
A kind of autocontrol method adjusted Gain Automaticly with signal intensity of circuit.The purpose of AGC calibrations is to keep sampling
Preceding baseband signal amplitude is maintained in an acceptable scope.
AGC calibrations of the prior art, it needs to ensure certain calibration accuracy, that is, needs to calibrate multiple gain levels,
Therefore the problem of prover time is long, and calibration efficiency is low can be caused.
The content of the invention
According to problems of the prior art, a kind of AGC calibration systems and method and the skill of mobile terminal are now provided
Art scheme, it is intended to keep shortening prover time as far as possible on the basis of AGC calibration accuracies, lift calibration efficiency；Specifically include：
A kind of AGC calibration systems, suitable for mobile terminal；Wherein, including：
Receiving unit, in a default frequency acceptance band, according to a default receiving power reception signal；
Gain calibration unit, the receiving unit is connected, multiple reception gains are preset with the gain calibration unit, used
The frequency in the frequency acceptance band is calibrated according to one of them selected described reception gain；
First computing unit, the gain calibration unit is connected, received for obtaining on the frequency being calibrated
The received signal strength, and calculate the difference of the received signal strength between the adjacent frequency of each two；
Memory cell, first computing unit is connected, for preserving the difference of the received signal strength；
Second computing unit, the memory cell and the gain calibration unit, the gain calibration unit are connected respectively
One default reception gain of selection is calibrated to a default frequency in the frequency acceptance band, and described the
Two computing units are according to the received signal strength of the frequency after being calibrated and are stored in described in the memory cell
The difference of received signal strength, the reception signal for calculating and exporting corresponding to all frequencies in the frequency acceptance band are strong
Degree, and the corresponding reception gain.
Preferably, the AGC calibration systems, wherein, the gain calibration unit is used to select a reception gain to make
For initial reception gain, and according to frequency progress of the initial reception gain to institute's calibration in need in the frequency acceptance band
Calibration；And
For selecting another described reception gain to calibrate a default frequency in the frequency acceptance band.
Preferably, the AGC calibration systems, wherein, first computing unit includes：
Signal intensity acquisition module is corresponding each strong with the reception signal of the frequency of reception gain calibration for obtaining
Degree；
Computing module, connect the signal intensity acquisition module, for following formula calculate each two it is adjacent described in
The difference of received signal strength between frequency：
△ RSSI (k)=RSSI (k)-RSSI (k-1)；
Wherein,
△ RSSI (k) represent the difference of the received signal strength between two adjacent frequencies；
K is more than or equal to 2, and less than or equal to the sum for the frequency for needing to calibrate in the frequency acceptance band.
Preferably, the AGC calibration systems, wherein, (k+1) individual described receive is preset with the gain calibration unit and is increased
Benefit.
A kind of AGC calibration methods, suitable for mobile terminal；Wherein, including：
Step S1, in a default frequency acceptance band, signal is obtained according to a default receiving power；
Step S2, all frequencies in the frequency acceptance band, and acquisition pair are calibrated according to a default initial reception gain
Should all frequencies received signal strength；
Step S3, the received signal strength between the adjacent frequency of each two that is calculated in the frequency acceptance band
Difference, and preserve；
Step S4, change the reception gain, to one in the frequency acceptance band under the default receiving power
The default frequency is calibrated, and obtains received signal strength corresponding to the frequency being calibrated；
Step S5, according to the difference of the received signal strength of preservation, other in the frequency acceptance band are calculated
The received signal strength corresponding to frequency, export all received signal strengths for being calculated and corresponding described connect
Receive gain；
Step S6, judge in the frequency acceptance band calibration in need frequency whether all calibration finish；
If calibration finishes, exit；
If not calibrated finish, turn to one default frequency being not yet calibrated of selection and calibrated, and described in return
Step S4.
Preferably, the AGC calibration methods, wherein, in the step S3, it is adjacent that each two is calculated with following formula
The difference of received signal strength between the frequency：
△ RSSI (k)=RSSI (k)-RSSI (k-1)；
Wherein,
△ RSSI (k) represent the difference of the received signal strength between two adjacent frequencies；
K is more than 2, and less than or equal to the sum for the frequency for needing to calibrate in the frequency acceptance band.
Preferably, the AGC calibration methods, wherein, in the step S4, change the reception gain, connect first to described
First frequency received in frequency band is calibrated, and obtains received signal strength corresponding to the frequency being calibrated.
Preferably, the AGC calibration methods, wherein, in the step S6, whether the frequency for judging currently to be calibrated is described
Last frequency in frequency acceptance band；
If the frequency being currently calibrated is last frequency of the frequency acceptance band, exit；
If the frequency being currently calibrated is not last frequency of the frequency acceptance band, turns to and calibrate next frequency
Point, and return to the step S4.
Preferably, the AGC calibration methods, wherein, multiple reception gains are preset, for every in the frequency acceptance band
One different reception gain of frequency corresponding selection one is calibrated.
Preferably, the AGC calibration methods, wherein, (k+1) individual described reception gain is preset, and will be connect described in one of them
Receive gain and be defined as the initial reception gain.
A kind of mobile terminal, wherein, including above-mentioned AGC calibration systems.
A kind of mobile terminal, wherein, using above-mentioned AGC calibration methods.
The beneficial effect of above-mentioned technical proposal is：When shortening AGC calibrations on the basis of ensureing AGC calibration accuracies as far as possible
Between, improve AGC calibration efficiencies.
Brief description of the drawings
Fig. 1 is a kind of structural representation of AGC calibration systems in the preferred embodiment of the present invention；
Fig. 2 is the schematic flow sheet of AGC calibration methods in the preferred embodiment of the present invention.
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 clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as limiting to the invention.
So-called AGC calibrations, are one kind sides of automatically controlling adjusted Gain Automaticly with signal intensity for making amplifying circuit
Method.The purpose of AGC calibrations is to keep the baseband signal amplitude before sampling to maintain in an acceptable scope.
AGC calibrations of the prior art, it usually needs three gain levels are calibrated to a frequency, and in a frequency band
The frequency of calibration in need carry out the calibration of same procedure.For example, need to calibrate 10 frequencies in a frequency band, and
Each frequency needs to calibrate at least three gain level, therefore for such as 10 frequencies, it is necessary to calibrate at least that 30 points could be complete
Into whole AGC calibration processes, prover time is long, and calibration efficiency is low.
In order to solve the above problems, in preferred embodiment of the invention, there is provided a kind of AGC calibration systems, such as Fig. 1 institutes
Show, specifically include：
Receiving unit 1.In the preferred embodiment of the present invention, receiving unit is used to connect under a default receiving power
The collection of letters number.In the preferred embodiment of the present invention, in AGC calibration processes of the present invention, outside received signal power
It is fixed.
Gain calibration unit 2, connect above-mentioned receiving unit 1.In the preferred embodiment of the present invention, in gain calibration unit
Multiple reception gains are preset with 2.Gain calibration unit 2 by change mobile terminal receiver reception gain come to receive
Corresponding frequency in frequency band is calibrated.
In the preferred embodiment of the present invention, gain calibration unit 2 first sets one of them default reception gain
For initial reception gain.Subsequent gain calibration unit 2 is according to the initial reception gain, to all need being included in frequency acceptance band
The frequency to be calibrated is calibrated.
In the preferred embodiment of the present invention, above-mentioned AGC calibration systems also include：
First computing unit 3, above-mentioned gain calibration unit 2 and receiving unit 1 are connected respectively.The preferable implementation of the present invention
In example, gain calibration unit 2 select above-mentioned initial reception gain to be included in frequency acceptance band calibration in need frequency
Calibrated.First computing unit 3 received signal strength according to corresponding to all frequencies after being calibrated, is calculated each two
The difference of received signal strength between adjacent frequency.
In the preferred embodiment of the present invention, as shown in figure 1, the first computing unit 3 further comprises：
Signal intensity acquisition module 31.In the preferred embodiment of the present invention, signal intensity acquisition module 31 is used to obtain
By received signal strength corresponding to all frequencies of calibration, that is, it is used to obtain the reception signal by the adjustment of initial reception gain
Received signal strength.For example, in the preferred embodiment of the present invention, calibration 10 is needed in a default frequency acceptance band
Frequency, then signal intensity acquisition module 31 be used for obtain 10 frequencies by initial reception gain calibration after corresponding to 10 connect
Receive signal intensity.
Computing module 32, connect above-mentioned signal intensity acquisition module 31.In the preferred embodiment of the present invention, computing module
32 obtain above-mentioned received signal strength, and the difference of the received signal strength between the adjacent frequency of each two is calculated with following formula
Value：
△ RSSI (k)=RSSI (k)-RSSI (k-1)；(1)
Wherein,
△ RSSI (k) represent the difference of the received signal strength between two adjacent frequencies；
K is more than or equal to 2, and less than or equal to the sum for the frequency for needing to calibrate in the frequency acceptance band.
In the preferred embodiment of the present invention, for example, the feelings for needing 10 frequencies of calibration in a frequency acceptance band
For condition, need that 9 △ RSSI (k), i.e. △ RSSI (2) to △ RSSI (10) are calculated altogether.Wherein △ RSSI (2) are corresponding
The difference of received signal strength between frequency 1 and frequency 2, the reception that △ RSSI (3) correspond between frequency 2 and frequency 3
The difference of signal intensity, by that analogy.Therefore, in preferred embodiment of the invention, k value is 2≤k≤10.
In the other embodiment of the present invention, of the difference for the received signal strength that k value and needs are calculated
Number is determined by the number for the frequency for needing to calibrate in a frequency acceptance band.
In the preferred embodiment of the present invention, above-mentioned first computing unit 3 calculates and exports above-mentioned received signal strength
Difference.
In the preferred embodiment of the present invention, also include in above-mentioned AGC calibration systems：
Memory cell 4, connect above-mentioned first computing unit 3.In the preferred embodiment of the present invention, memory cell 4 is used for
The difference for the received signal strength for calculating and exporting including the first computing unit 3.
Further, in preferred embodiment of the invention, memory cell 4 puts in order according to each frequency, preserves
The difference of corresponding received signal strength.I.e. the association of memory cell 4 preserve the difference of received signal strength that is calculated and
The arrangement cis-position of two corresponding adjacent frequencies.
In the preferred embodiment of the present invention, above-mentioned AGC calibration systems also include：
Second computing unit 5, above-mentioned gain calibration unit 3 and memory cell 4 are connected respectively.The preferable implementation of the present invention
In example, when gain calibration unit 3 with selected one initial reception gain to be included in frequency acceptance band school in need
After accurate frequency is calibrated, it keeps receiving power constant, changes reception gain, that is, reselects default receives and increase
Benefit, and a default frequency being included in frequency acceptance band is calibrated according to the reception gain.
In the preferred embodiment of the present invention, the second computing unit 5 obtains connecing for the corresponding frequency by this calibration
Signal intensity is received, and transfers the difference for all received signal strengths being stored in memory cell 4.Second computing unit 5
According to the above-mentioned corresponding received signal strength of frequency and the difference of all received signal strengths, it is calculated is chosen at this successively
Reception gain under the frequency of calibration in need received signal strength.
For example, in the preferred embodiment of the present invention, gain calibration unit 3 selects a default reception gain to receiving
First frequency in frequency band is calibrated.Second computing unit 5 obtains reception corresponding to first frequency after calibration
Signal intensity, and according to the difference of the received signal strength preserved in memory cell 4, be calculated successively corresponding to other frequencies
Received signal strength.In the preferred embodiment of the present invention, the second computing unit 5 exports the correspondence institute school in need being calculated
The received signal strength of accurate frequency, and the currently selected reception gain selected.
In the preferred embodiment of the present invention, after gain calibration unit 3 completes the calibration to frequency, change connects
Gain (reselecting another not yet selected reception gain) is received, another default frequency is calibrated and (selected
Select a frequency being not yet calibrated to be calibrated).Calibration process is same as above, select one be not yet selected default connect
Gain is received, and selected frequency is calibrated.Difference of second computing unit 5 also according to the received signal strength of preservation
And received signal strength corresponding to the frequency of current alignment be calculated under the reception gain calibration in need frequency
The received signal strength of point, export the above-mentioned received signal strength being calculated and corresponding reception gain.
The present invention preferred embodiment in, in said process circulation continuous to frequency acceptance band calibration in need frequency
Point, which is calibrated, to be finished.
In the preferred embodiment of the present invention, for example, gain calibration unit 3 selects first in frequency acceptance band first
Individual frequency (frequency 1), calibrated with first default reception gain (reception gain 1).Second computing unit 5 is according to this
The received signal strength of all frequencies is calculated in calibration, exports all received signal strengths being calculated and connects accordingly
Receive gain；
Then, gain calibration unit 3 selects second frequency (frequency 2) in frequency acceptance band, default is connect with second
Gain (reception gain 2) is received to be calibrated.The reception signal of all frequencies is calculated according to this calibration for second computing unit 5
Intensity, export all received signal strengths being calculated and corresponding reception gain.
Said process circulates progress successively, until gain calibration unit 3 is carried out to last frequency in frequency acceptance band
After calibration, the second computing unit 5 calculates and exports corresponding received signal strength and selected reception gain, entirely
Calibration process is completed.
In the other embodiment of the present invention, above-mentioned calibration process is not limited to putting in order successively to frequency with frequency
Calibrated, as long as ensureing to calibrate i.e. each frequency being included in frequency acceptance band with a corresponding reception gain
Can.
In the preferred embodiment of the present invention, as shown in Figure 2, there is provided a kind of AGC calibrations based on above-mentioned AGC calibration systems
Method, specifically include：
Step S1, in a default frequency acceptance band, signal is obtained according to a default receiving power；
In the preferred embodiment of the present invention, in whole AGC calibration processes, the receiving power of the receiver of mobile terminal
All the time it is fixed.
Step S2, according to all frequencies in a default initial reception gain calibration frequency acceptance band, and obtain corresponding institute
There is the received signal strength of frequency；
In the preferred embodiment of the present invention, multiple different reception gains are preset with, and by one of reception gain
It is defined as initial reception gain.
In the preferred embodiment of the present invention, using above-mentioned selected initial reception gain, to being included in frequency acceptance band
The frequency of interior calibration in need is calibrated.
In the preferred embodiment of the present invention, after the completion of being calibrated to all frequencies, the reception of corresponding each frequency is obtained
Signal intensity.
Step S3, the difference of the received signal strength between the adjacent frequency of each two that is calculated in frequency acceptance band,
And preserve；
In the preferred embodiment of the present invention, frequency is calibrated using initial reception gain and obtains corresponding reception
After signal intensity, the difference of the received signal strength between the adjacent frequency of each two is calculated using formula (1), and preserves the difference
Value.
In the preferred embodiment of the present invention, for example, it is desired to calibrate 10 frequencies, then it is strong that 9 reception signals are calculated
The difference of degree, and preserve.
Step S4, change reception gain, a default frequency in frequency acceptance band is entered under default receiving power
Row calibration, and obtain received signal strength corresponding to the frequency being calibrated；
In the preferred embodiment of the present invention, it is to select a reception being not yet previously used to increase to change reception gain
Benefit, and one of them the default frequency being included in frequency acceptance band is calibrated using the selected reception gain.
In the preferred embodiment of the present invention, after the above-mentioned frequency calibration for being chosen to be calibrated, the frequency is obtained
Received signal strength corresponding to point.
Step S5, according to the difference of the received signal strength of preservation, remaining frequency being calculated in frequency acceptance band is corresponding
Received signal strength, export all received signal strengths being calculated and corresponding reception gain；
In the preferred embodiment of the present invention, obtained according in the difference of the received signal strength of preservation, and step S4
The frequency being calibrated received signal strength, the received signal strength of remaining frequency is calculated.
In the preferred embodiment of the present invention, the received signal strength for all frequencies being calculated is exported, and correspondingly
Selected reception gain.
Step S6, judge in frequency acceptance band calibration in need frequency whether all calibration finish；
If calibration finishes, exit；
If not calibrated finish, turn to one default frequency being not yet calibrated of selection and calibrated, and return to step
S4。
In the preferred embodiment of the present invention, judge whether to calibrate the method finished can have it is a variety of, such as：
Using initial reception gain in frequency acceptance band the frequency of calibration in need calibrate, and be calculated
After the difference of received signal strength, change reception gain (reselecting a reception gain being not yet previously used), and
First frequency in frequency acceptance band is calibrated；Obtain the frequency corresponding received signal strength after calibration, and root
Remaining frequency is obtained under the selected reception gain according to the mathematic interpolation for the received signal strength for calculating and preserving before
Corresponding received signal strength.
In the preferred embodiment of the present invention, all frequencies institute being output under selected reception gain by calibration is right
The received signal strength answered, and corresponding selected reception gain.
In the preferred embodiment of the present invention, finished to first frequency calibration, and it is strong to export corresponding reception signal
After degree, second frequency of calibration is turned to, i.e., equally changes reception gain, second frequency is calibrated, obtain frequency warp
The corresponding received signal strength crossed after calibration, and drawn according to the mathematic interpolation for the received signal strength for calculating and preserving before
Remaining frequency is under the selected reception gain by the received signal strength of calibration.Export all reception letters being calculated
Number intensity and corresponding selected reception gain.
In the preferred embodiment of the present invention, with said process successively institute's calibration in need to being included in frequency acceptance band
Frequency calibrated.Therefore, in above-mentioned steps S6, you can with by judging whether the frequency of current alignment is the frequency acceptance band
The mode of last interior frequency, which is realized, to be judged whether to calibrate the process finished to all frequencies in frequency acceptance band.
The present invention other embodiment in, in frequency acceptance band institute calibration in need frequency calibrate when, be not
Being defined in must be calibrated according to ordering.Above-described embodiment only illustrates whole calibration process and judges frequency
Whether the method finished is all calibrated.
In the preferred embodiment of the present invention, in above-mentioned whole calibration process, the receiving power of the receiver of mobile terminal
All the time fix.
In summary, it is an object of the present invention in a default frequency acceptance band, received with a receiving power fixed
Signal, and using a rational initial reception gain to be included in the frequency acceptance band the frequency of calibration in need carry out school
Standard, it is calculated and preserves the difference of the received signal strength between frequency；
Then change currently used reception gain, (of the invention one is calibrated to one of them default frequency
In preferred embodiment, a frequency can be calibrated every time, successively to being included in frequency acceptance band since first frequency
All frequencies are calibrated), read the frequency corresponding received signal strength after calibration, and according to calculating and preserve before
Received signal strength difference, be calculated under the reception gain by calibration remaining frequency corresponding to reception signal it is strong
Degree.Export all received signal strengths being calculated and corresponding selected reception gain.
Next frequency (such as turning to second frequency) is then turned to, and repeats above-mentioned calibration process and (changes and receive
The reception signal that remaining frequency is obtained according to the mathematic interpolation of received signal strength is strong for gain-to single frequency point calibrate-
Degree-output received signal strength and corresponding reception gain).
Circulate said process, until in frequency acceptance band calibration in need frequency calibrate and finish untill.
Using the calibration system and calibration method of the present invention, prover time can be shortened.For example, in the prior art, for
In 10 frequencies of a frequency acceptance band internal calibration, in order to ensure calibration accuracy, each frequency needs to calibrate at least three gain etc.
Level, then need to calibrate at least 30 points.
And in technical scheme, in 10 frequencies of a frequency acceptance band internal calibration, it is only necessary to calibrate 20
Point (can calibrate 10 points using initial reception gain, and change reception gain respectively, 10 points are calibrated respectively), and
And the gain level of each point calibration is more than at least three of the prior art, on the basis of calibration accuracy is ensured, significantly shortens
Prover time, improve calibration efficiency.
In the preferred embodiment of the present invention, a kind of mobile terminal is also provided, including above-mentioned AGC calibration systems.
In the preferred embodiment of the present invention, a kind of mobile terminal is also provided, wherein using above-mentioned AGC calibration methods.
Preferred embodiments of the present invention are the foregoing is only, not thereby limit embodiments of the present invention and protection model
Enclose, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Scheme obtained by equivalent substitution and obvious change, should be included in protection scope of the present invention.
Claims (11)
- A kind of 1. AGC calibration systems, suitable for mobile terminal；It is characterised in that it includes：Receiving unit, in a default frequency acceptance band, according to a default receiving power reception signal；Gain calibration unit, the receiving unit is connected, multiple reception gains are preset with the gain calibration unit, for root The frequency in the frequency acceptance band is calibrated according to one of them selected described reception gain；First computing unit, the gain calibration unit is connected, for obtaining the institute received on the frequency being calibrated Received signal strength is stated, and calculates the difference of the received signal strength between the adjacent frequency of each two；Memory cell, first computing unit is connected, for preserving the difference of the received signal strength；Second computing unit, the memory cell and the gain calibration unit, the gain calibration Unit selection are connected respectively One default reception gain is calibrated to a default frequency in the frequency acceptance band, second meter Unit is calculated according to the received signal strength of the frequency after being calibrated and the reception being stored in the memory cell The difference of signal intensity, calculate and export the received signal strength corresponding to all frequencies in the frequency acceptance band, with And the corresponding reception gain；The gain calibration unit is used to select a reception gain initially to connect as initial reception gain, and according to described Receive gain in the frequency acceptance band the frequency of calibration in need calibrate；AndFor selecting another described reception gain to calibrate a default frequency in the frequency acceptance band.
- 2. AGC calibration systems as claimed in claim 1, it is characterised in that first computing unit includes：Signal intensity acquisition module, it is corresponding each with the received signal strength of the frequency of reception gain calibration for obtaining；Computing module, the signal intensity acquisition module is connected, for calculating the adjacent frequency of each two with following formula Between received signal strength difference：△ RSSI (k)=RSSI (k)-RSSI (k-1)；Wherein,△ RSSI (k) represent the difference of the received signal strength between two adjacent frequencies；K is more than or equal to 2, and less than or equal to the sum for the frequency for needing to calibrate in the frequency acceptance band.
- 3. AGC calibration systems as claimed in claim 2, it is characterised in that it is individual to be preset with (k+1) in the gain calibration unit The reception gain.
- A kind of 4. AGC calibration methods, suitable for mobile terminal；It is characterised in that it includes：Step S1, in a default frequency acceptance band, signal is obtained according to a default receiving power；Step S2, all frequencies in the frequency acceptance band are calibrated according to a default initial reception gain, and obtain corresponding institute There is the received signal strength of the frequency；Step S3, the difference of the received signal strength between the adjacent frequency of each two that is calculated in the frequency acceptance band Value, and preserve；Step S4, change the reception gain, it is default to one in the frequency acceptance band under the default receiving power The frequency calibrated, and obtain received signal strength corresponding to the frequency that is calibrated；Step S5, according to the difference of the received signal strength of preservation, remaining frequency in the frequency acceptance band is calculated The corresponding received signal strength, exports all received signal strengths being calculated and corresponding described receive increases Benefit；Step S6, judge in the frequency acceptance band calibration in need frequency whether all calibration finish；If calibration finishes, exit；If not calibrated finish, turn to one default frequency being not yet calibrated of selection and calibrated, and return to the step S4。
- 5. AGC calibration methods as claimed in claim 4, it is characterised in that in the step S3, be calculated with following formula The difference of received signal strength between the adjacent frequency of each two：△ RSSI (k)=RSSI (k)-RSSI (k-1)；Wherein,△ RSSI (k) represent the difference of the received signal strength between two adjacent frequencies；K is more than 2, and less than or equal to the sum for the frequency for needing to calibrate in the frequency acceptance band.
- 6. AGC calibration methods as claimed in claim 4, it is characterised in that in the step S4, change the reception gain, First frequency in the frequency acceptance band is calibrated first, and obtains reception signal corresponding to the frequency being calibrated Intensity.
- 7. AGC calibration methods as claimed in claim 6, it is characterised in that in the step S6, judge the frequency being currently calibrated Whether point is last frequency in the frequency acceptance band；If the frequency being currently calibrated is last frequency of the frequency acceptance band, exit；If the frequency being currently calibrated is not last frequency of the frequency acceptance band, turns to and calibrate next frequency, and Return to the step S4.
- 8. AGC calibration methods as claimed in claim 4, it is characterised in that preset multiple reception gains, connect for described The different reception gain of each frequency corresponding selection one in frequency band is received to be calibrated.
- 9. AGC calibration methods as claimed in claim 5, it is characterised in that default (k+1) individual described reception gain, and by its In a reception gain be defined as the initial reception gain.
- 10. a kind of mobile terminal, it is characterised in that including the AGC calibration systems as described in claim 1-3.
- 11. a kind of mobile terminal, it is characterised in that using the AGC calibration methods as described in claim 4-9.
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| CN108449789B (en) * | 2018-02-27 | 2021-05-25 | 海能达通信股份有限公司 | AGC gain control device and method |
| CN112996036B (en) * | 2021-02-25 | 2022-07-12 | 展讯通信（深圳）有限公司 | AGC calibration preprocessing method and device, storage medium and terminal |
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| CN103841597A (en) * | 2012-11-27 | 2014-06-04 | 联芯科技有限公司 | Frequency point scanning method and device for TD-SCDMA system |
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