CN105450317A - AGC calibration system and method and mobile terminal - Google Patents
AGC calibration system and method and mobile terminal Download PDFInfo
- Publication number
- CN105450317A CN105450317A CN201410374613.1A CN201410374613A CN105450317A CN 105450317 A CN105450317 A CN 105450317A CN 201410374613 A CN201410374613 A CN 201410374613A CN 105450317 A CN105450317 A CN 105450317A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal strength
- calibration
- received signal
- gain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
The invention discloses an AGC calibration system and method and a mobile terminal and belongs to the technical field of gain calibration of a receiver. The system comprises a receiving unit, which is used for receiving radio-frequency signals according to a preset receiving power in a preset receiving frequency band; a gain calibration unit, which is connected with the receiving unit, and is provided with a plurality of reception gains in advance; a first computation unit, which is connected with the gain calibration unit; a storage unit, which is connected with a signal strength computation unit; and a second computation unit, which is connected with the storage unit and the gain calibration unit. The method comprises the following steps: to begin with, carrying out calibration on all frequency points by adopting an initial reception gain, and carrying out calculating to obtain received signal strength difference value between the adjacent frequency points; and then, changing the reception gain, and carrying out calibration on the frequency points respectively, and carrying out calculation according to the received signal strength difference value to obtain received signal strength of the rest frequency points under the reception gain. The beneficial effects of the technical scheme are that calibration time is reduced on the basis that calibration accuracy is guaranteed, and calibration efficiency is improved.
Description
Technical field
The present invention relates to receiver gain collimation technique field, particularly relate to a kind of AGC calibration system and method and mobile terminal.
Background technology
Automatic growth control (AutoGainControl, AGC), namely usually said AGC calibration is a kind of autocontrol method adjusted with signal strength signal intensity making amplifying circuit Gain Automaticly.The object of AGC calibration is that the baseband signal amplitude before keeping sampling maintains in an acceptable scope.
AGC calibration of the prior art, it needs to ensure certain calibration accuracy, namely needs to calibrate multiple gain level, the alignment time therefore can be caused long, the problem that calibration efficiency is low.
Summary of the invention
According to problems of the prior art, now provide the technical scheme of a kind of AGC calibration system and method and mobile terminal, be intended to keep the alignment time is shortened in the basis of AGC calibration accuracy as far as possible, promote calibration efficiency; Specifically comprise:
A kind of AGC calibration system, is applicable to mobile terminal; Wherein, comprising:
Receiving element, in a default frequency acceptance band, according to the received power Received signal strength that presets;
Gain calibration unit, connects described receiving element, is preset with multiple receiving gain in described gain calibration unit, for according to by select one of them described in receiving gain the frequency in described frequency acceptance band is calibrated;
First computing unit, connects described gain calibration unit, for obtaining the described received signal strength that the described frequency be calibrated receives, and calculates the difference of the received signal strength between every two adjacent described frequencies;
Memory cell, connects described first computing unit, for preserving the difference of described received signal strength;
Second computing unit, connect described memory cell and described gain calibration unit respectively, the default described receiving gain of described gain calibration Unit selection one is calibrated the default described frequency of in described frequency acceptance band, described second computing unit is according to the received signal strength of the described frequency after being calibrated and the difference being stored in the described received signal strength in described memory cell, calculate and export the received signal strength corresponding to all described frequency in described frequency acceptance band, and corresponding described receiving gain.
Preferably, this AGC calibration system, wherein, described gain calibration unit for selecting a described receiving gain as initial receiving gain, and is calibrated all frequencies of calibration that need in described frequency acceptance band according to described initial receiving gain; And
For selecting a described receiving gain, the default frequency of in described frequency acceptance band is calibrated.
Preferably, this AGC calibration system, wherein, described first computing unit comprises:
Signal strength signal intensity acquisition module, corresponding each with the received signal strength of the frequency of described process receiving gain calibration for obtaining;
Computing module, connects described signal strength signal intensity acquisition module, for the difference of the received signal strength between every two the adjacent described frequencies of following formulae discovery:
ΔRSSI(k)＝RSSI(k)-RSSI(k-1)；
Wherein,
Δ RSSI (k) represents the difference of the received signal strength between two adjacent described frequencies;
K is more than or equal to 2, and is less than or equal in described frequency acceptance band the sum needing the frequency calibrated.
Preferably, this AGC calibration system, wherein, is preset with (k+1) individual described receiving gain in described gain calibration unit.
A kind of AGC calibration steps, is applicable to mobile terminal; Wherein, comprising:
Step S1, in a default frequency acceptance band, obtains signal according to a received power preset;
Step S2, calibrates all frequencies in described frequency acceptance band according to an initial receiving gain preset, and obtains the received signal strength of corresponding all described frequencies;
Step S3, calculates the difference of the received signal strength between every two the adjacent described frequencies in described frequency acceptance band, and preserves;
Step S4, changes described receiving gain, calibrates under the described received power preset to the default described frequency of in described frequency acceptance band, and obtains received signal strength corresponding to the frequency that is calibrated;
Step S5, according to the difference of described received signal strength of preserving, calculates the described received signal strength that other frequencies in described frequency acceptance band are corresponding, exports the described receiving gain of all described received signal strength and the correspondence calculated;
Step S6, judges whether all frequencies of calibration that need in described frequency acceptance band are all calibrated complete;
If all calibrate complete, then exit;
If do not calibrate complete, then the frequency preset turning to selection one to be not yet calibrated is calibrated, and returns described step S4.
Preferably, this AGC calibration steps, wherein, in described step S3, obtains the difference of the received signal strength between every two adjacent described frequencies with following formulae discovery:
ΔRSSI(k)＝RSSI(k)-RSSI(k-1)；
Wherein,
Δ RSSI (k) represents the difference of the received signal strength between two adjacent described frequencies;
K is greater than 2, and is less than or equal in described frequency acceptance band the sum needing the frequency calibrated.
Preferably, this AGC calibration steps, wherein, in described step S4, changes described receiving gain, first calibrates the described frequency of first in described frequency acceptance band, and obtains received signal strength corresponding to the frequency that is calibrated.
Preferably, this AGC calibration steps, wherein, in described step S6, judges that whether the current frequency be calibrated is last frequency in described frequency acceptance band;
If the frequency be calibrated current is last frequency of described frequency acceptance band, then exit;
If the frequency be calibrated current is not last frequency of described frequency acceptance band, then turn to the next frequency of calibration, and return described step S4.
Preferably, this AGC calibration steps, wherein, preset multiple described receiving gain, the described receiving gain corresponding for each the frequency corresponding selection one in described frequency acceptance band is calibrated.
Preferably, this AGC calibration steps, wherein, presets (k+1) individual described receiving gain, and receiving gain described in one of them is defined as described initial receiving gain.
A kind of mobile terminal, wherein, comprises above-mentioned AGC calibration system.
A kind of mobile terminal, wherein, adopts above-mentioned AGC calibration steps.
The beneficial effect of technique scheme is: on the basis ensureing AGC calibration accuracy, shorten the AGC alignment time as far as possible, improve AGC calibration efficiency.
Accompanying drawing explanation
Fig. 1 is in preferred embodiment of the present invention, a kind of structural representation of AGC calibration system;
Fig. 2 is in preferred embodiment of the present invention, the schematic flow sheet of AGC calibration steps.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
So-called AGC calibration is a kind of autocontrol method adjusted with signal strength signal intensity making amplifying circuit Gain Automaticly.The object of AGC calibration is that the baseband signal amplitude before keeping sampling maintains in an acceptable scope.
AGC calibration of the prior art, needs to calibrate three gain level to a frequency usually, and to all calibrations needing the frequency of calibration all to carry out same procedure in a frequency band.Such as, need calibration 10 frequencies in a frequency band, and each frequency needs calibration at least 3 gain level, therefore for such as 10 frequencies, need calibration at least 30 points just can complete whole AGC calibration process, the alignment time is long, and calibration efficiency is low.
In order to solve the problem, in preferred embodiment of the present invention, a kind of AGC calibration system is provided, as shown in Figure 1, specifically comprise:
Receiving element 1.In preferred embodiment of the present invention, receiving element is used for Received signal strength under a default received power.In preferred embodiment of the present invention, in AGC calibration process of the present invention, outside received signal power is fixing.
Gain calibration unit 2, connects above-mentioned receiving element 1.In preferred embodiment of the present invention, in gain calibration unit 2, be preset with multiple receiving gain.Gain calibration unit 2 is calibrated the corresponding frequency in frequency acceptance band by the receiving gain of the receiver changing mobile terminal.
In preferred embodiment of the present invention, first one of them receiving gain preset is set as initial receiving gain by gain calibration unit 2.Gain calibration unit 2 is according to this initial receiving gain subsequently, all calibrates all frequencies of calibration that need be included in frequency acceptance band.
In preferred embodiment of the present invention, above-mentioned AGC calibration system also comprises:
First computing unit 3, connects above-mentioned gain calibration unit 2 and receiving element 1 respectively.In preferred embodiment of the present invention, gain calibration unit 2 selects above-mentioned initial receiving gain to calibrate all frequencies of calibration that need be included in frequency acceptance band.The received signal strength that first computing unit 3 is corresponding according to all frequencies after being calibrated, calculates the difference of the received signal strength between every two adjacent frequencies.
In preferred embodiment of the present invention, as shown in Figure 1, the first computing unit 3 comprises further:
Signal strength signal intensity acquisition module 31.In preferred embodiment of the present invention, signal strength signal intensity acquisition module 31 for obtaining received signal strength corresponding to all frequencies through calibration, namely for obtaining the received signal strength of the Received signal strength adjusted through initial receiving gain.Such as, in preferred embodiment of the present invention, in a default frequency acceptance band, need calibration 10 frequencies, then signal strength signal intensity acquisition module 31 is for obtaining 10 corresponding after initial receiving gain calibration received signal strengths of these 10 frequencies.
Computing module 32, connects above-mentioned signal strength signal intensity acquisition module 31.In preferred embodiment of the present invention, computing module 32 obtains above-mentioned received signal strength, and with the difference of the received signal strength between every two the adjacent frequencies of following formulae discovery:
ΔRSSI(k)＝RSSI(k)-RSSI(k-1)；(1)
Wherein,
Δ RSSI (k) represents the difference of the received signal strength between two adjacent described frequencies;
K is more than or equal to 2, and is less than or equal in described frequency acceptance band the sum needing the frequency calibrated.
In preferred embodiment of the present invention, such as, for for needing the situation of calibration 10 frequencies in a frequency acceptance band, altogether need to calculate 9 Δs RSSI (k), i.e. Δ RSSI (2) to Δ RSSI (10).Wherein Δ RSSI (2) is corresponding to the difference of the received signal strength between frequency 1 and frequency 2, Δ RSSI (3) corresponding to the difference of the received signal strength between frequency 2 and frequency 3, by that analogy.Therefore, in preferred embodiment of the present invention, the value of k is 2≤k≤10.
In other embodiments of the present invention, the number of the difference of the received signal strength that the value of k and needs calculate determines by needing the number of the frequency calibrated in a frequency acceptance band.
In preferred embodiment of the present invention, above-mentioned first computing unit 3 calculates and exports the difference of above-mentioned received signal strength.
In preferred embodiment of the present invention, also comprise in above-mentioned AGC calibration system:
Memory cell 4, connects above-mentioned first computing unit 3.In preferred embodiment of the present invention, memory cell 4 calculates and the difference of the received signal strength exported for comprising the first computing unit 3.
Further, in preferred embodiment of the present invention, memory cell 4 puts in order according to each frequency, preserves the difference of corresponding received signal strength.Namely memory cell 4 associates the difference of received signal strength and the arrangement cis-position of corresponding two adjacent frequencies of preserving and calculating.
In preferred embodiment of the present invention, above-mentioned AGC calibration system also comprises:
Second computing unit 5, connects above-mentioned gain calibration unit 3 and memory cell 4 respectively.In preferred embodiment of the present invention, when gain calibration unit 3 with by an initial receiving gain selecting to be included in frequency acceptance band all need the frequency of calibration to calibrate after, it keeps received power constant, change receiving gain, namely reselect a default receiving gain, and according to this receiving gain, one that is included in frequency acceptance band default frequency is calibrated.
In preferred embodiment of the present invention, the second computing unit 5 obtains the received signal strength of the corresponding frequency through this calibration, and transfers the difference of all received signal strengths be stored in memory cell 4.The received signal strength of the second computing unit 5 according to above-mentioned corresponding frequency and the difference of all received signal strengths, calculate at this successively by all received signal strengths needing the frequency of calibration under the receiving gain selected.
Such as, in preferred embodiment of the present invention, gain calibration unit 3 selects a default receiving gain to calibrate the frequency of first in frequency acceptance band.Second computing unit 5 obtains received signal strength corresponding to first frequency after calibration, and according to the difference of the received signal strength preserved in memory cell 4, calculates the received signal strength that other frequencies are corresponding successively.In preferred embodiment of the present invention, the second computing unit 5 exports all received signal strengths needing the frequency of calibration of the correspondence calculated, and current by the receiving gain selected.
In preferred embodiment of the present invention, after gain calibration unit 3 completes the calibration to a frequency, change receiving gain (namely reselecting another still non-selected receiving gain), another frequency preset is calibrated (namely selecting a frequency be not yet calibrated to calibrate).Calibration process is the same, selects one not yet by the receiving gain preset selected, and calibrates by the frequency selected.Second computing unit 5 equally calculates all received signal strengths needing the frequency of calibration under this receiving gain according to the difference of the received signal strength preserved and received signal strength corresponding to the frequency of current alignment, exports the receiving gain of the above-mentioned received signal strength that calculates and correspondence.
In preferred embodiment of the present invention, said process circulation continuous is all calibrated complete to all frequencies of calibration that need in frequency acceptance band.
In a preferred embodiment of the present invention, such as, first gain calibration unit 3 selects first frequency (frequency 1) in frequency acceptance band, calibrates with first default receiving gain (receiving gain 1).Second computing unit 5 obtains the received signal strength of all frequencies according to this calibration calculations, export all received signal strengths and corresponding receiving gain that calculate;
Subsequently, gain calibration unit 3 selects second frequency (frequency 2) in frequency acceptance band, calibrates with second default receiving gain (receiving gain 2).Second computing unit 5 obtains the received signal strength of all frequencies according to this calibration calculations, export all received signal strengths and corresponding receiving gain that calculate.
Said process circulates successively and carries out, until after last frequency in gain calibration unit 3 pairs of frequency acceptance bands calibrates, the second computing unit 5 calculates and exports corresponding received signal strength and by the receiving gain selected, whole calibration process completes.
In other embodiments of the present invention, above-mentioned calibration process is not defined as to be calibrated frequency successively with putting in order of frequency, as long as ensure all to calibrate with a corresponding receiving gain each frequency be included in frequency acceptance band.
In preferred embodiment of the present invention, as shown in Figure 2, a kind of AGC calibration steps based on above-mentioned AGC calibration system is provided, specifically comprises:
Step S1, in a default frequency acceptance band, obtains signal according to a received power preset;
In preferred embodiment of the present invention, in whole AGC calibration process, the received power of the receiver of mobile terminal is fixing all the time.
Step S2, according to all frequencies in an initial receiving gain calibration frequency acceptance band preset, and obtains the received signal strength of corresponding all frequencies;
In preferred embodiment of the present invention, be preset with multiple different receiving gain, and one of them receiving gain is defined as initial receiving gain.
In preferred embodiment of the present invention, adopt above-mentioned by the initial receiving gain selected, all frequencies of calibration that need be included in frequency acceptance band are calibrated.
In preferred embodiment of the present invention, after all frequencies have all been calibrated, obtain the received signal strength of corresponding each frequency.
Step S3, calculates the difference of the received signal strength between every two the adjacent frequencies in frequency acceptance band, and preserves;
In preferred embodiment of the present invention, adopt initial receiving gain to calibrate frequency and after obtaining corresponding received signal strength, adopt formula (1) to calculate the difference of the received signal strength between every two adjacent frequencies, and preserve this difference.
In preferred embodiment of the present invention, such as, need calibration 10 frequencies, then calculate the difference of 9 received signal strengths, and preserve.
Step S4, changes receiving gain, calibrates under the received power preset to the default frequency of in frequency acceptance band, and obtains received signal strength corresponding to the frequency that is calibrated;
In preferred embodiment of the present invention, change receiving gain and be the not yet used receiving gain of selection one, and adopt this to be calibrated one of them frequency preset be included in frequency acceptance band by the receiving gain selected.
In preferred embodiment of the present invention, after the above-mentioned frequency being undertaken calibrating by selection is calibrated, obtain the received signal strength that this frequency is corresponding.
Step S5, according to the difference of received signal strength of preserving, calculates the received signal strength that all the other frequencies in frequency acceptance band are corresponding, exports the receiving gain of all received signal strengths and the correspondence calculated;
In preferred embodiment of the present invention, according to the difference of the received signal strength preserved, and the received signal strength of the frequency be calibrated obtained in step S4, calculate the received signal strength of all the other frequencies.
In preferred embodiment of the present invention, export the received signal strength of all frequencies calculated, and correspondence by the receiving gain selected.
Step S6, judges whether all frequencies of calibration that need in frequency acceptance band are all calibrated complete;
If all calibrate complete, then exit;
If do not calibrate complete, then the frequency preset turning to selection one to be not yet calibrated is calibrated, and returns step S4.
In preferred embodiment of the present invention, judge whether that all calibrating complete method can have multiple, such as:
Adopting initial receiving gain, all frequencies of calibration that need in frequency acceptance band are calibrated, and after calculating the difference of received signal strength, change receiving gain (namely reselecting a not yet used receiving gain), and the frequency of first in frequency acceptance band is calibrated; Obtain the received signal strength that this frequency is corresponding after calibration, and according to calculate before and the mathematic interpolation of the received signal strength preserved obtains all the other frequencies in this by the received signal strength of the correspondence under the receiving gain selected.
In preferred embodiment of the present invention, be output in by under the receiving gain selected through the received signal strength corresponding to all frequencies of calibration, and correspondence by the receiving gain selected.
In preferred embodiment of the present invention, complete to first frequency calibration, and after exporting corresponding received signal strength, turn to calibration second frequency, namely receiving gain is changed equally, second frequency is calibrated, obtains the corresponding received signal strength of this frequency after calibration, and according to calculate before and the mathematic interpolation of the received signal strength preserved draws all the other frequencies in this by the received signal strength through calibrating under the receiving gain selected.Export all received signal strengths of calculating and correspondence by the receiving gain selected.
In preferred embodiment of the present invention, successively all frequencies of calibration that need be included in frequency acceptance band are calibrated with said process.Therefore, in above-mentioned steps S6, namely can by judging that whether the frequency of current alignment is that the mode of last frequency in this frequency acceptance band realizes judging whether that all frequencies in frequency acceptance band all calibrate complete process.
In other embodiments of the present invention, when the frequency of all needs calibrations in frequency acceptance band is calibrated, be not defined in and must calibrate according to ordering.Above-described embodiment is only and illustrates whole calibration process and judge whether frequency all calibrates complete method.
In preferred embodiment of the present invention, in above-mentioned whole calibration process, the received power of the receiver of mobile terminal is fixed all the time.
In sum, the object of the invention is to, in a frequency acceptance band preset, with a fixing received power Received signal strength, and adopt one reasonably initial receiving gain all frequencies of calibration that need be included in this frequency acceptance band are calibrated, calculate and preserve the difference of the received signal strength between frequency;
Change the receiving gain of current use subsequently, calibrate (in a preferred embodiment of the present invention to the frequency that one of them is preset, can from first frequency, each calibration frequency, successively all frequencies be included in frequency acceptance band are calibrated), read the received signal strength that this frequency is corresponding after calibration, and according to calculating before and the difference of the received signal strength preserved, calculate received signal strength corresponding through all the other frequencies of calibration under this receiving gain.All received signal strengths that output calculates and correspondence are by the receiving gain selected.
Then turn to next frequency (such as turning to second frequency), and repeat above-mentioned calibration process (namely change receiving gain-to single frequency point calibrate-obtain the received signal strength-output received signal strength of all the other frequencies and the receiving gain of correspondence according to the mathematic interpolation of received signal strength).
Circulation said process, in frequency acceptance band all need calibration frequency all calibrate complete till.
Apply calibration system of the present invention and calibration steps, can the alignment time be shortened.Such as, in prior art, at a frequency acceptance band internal calibration 10 frequencies, in order to ensure calibration accuracy, each frequency needs calibration at least 3 gain level, then need to calibrate at least 30 points.
And in technical scheme of the present invention, for at a frequency acceptance band internal calibration 10 frequencies, calibration 20 points are only needed (to adopt initial receiving gain to calibrate 10 points, and change receiving gain respectively, 10 points are calibrated respectively), and the gain level of each calibration is greater than at least 3 of the prior art, on the basis ensureing calibration accuracy, significantly shorten the alignment time, improve calibration efficiency.
In preferred embodiment of the present invention, also provide a kind of mobile terminal, comprising above-mentioned AGC calibration system.
In preferred embodiment of the present invention, also provide a kind of mobile terminal, wherein adopt above-mentioned AGC calibration steps.
The foregoing is only preferred embodiment of the present invention; not thereby embodiments of the present invention and protection range is limited; to those skilled in the art; should recognize and all should be included in the scheme that equivalent replacement done by all utilizations specification of the present invention and diagramatic content and apparent change obtain in protection scope of the present invention.
Claims (12)
1. an AGC calibration system, is applicable to mobile terminal; It is characterized in that, comprising:
Receiving element, in a default frequency acceptance band, according to the received power Received signal strength that presets;
Gain calibration unit, connects described receiving element, is preset with multiple receiving gain in described gain calibration unit, for according to by select one of them described in receiving gain the frequency in described frequency acceptance band is calibrated;
First computing unit, connects described gain calibration unit, for obtaining the described received signal strength that the described frequency be calibrated receives, and calculates the difference of the received signal strength between every two adjacent described frequencies;
Memory cell, connects described first computing unit, for preserving the difference of described received signal strength;
Second computing unit, connect described memory cell and described gain calibration unit respectively, the default described receiving gain of described gain calibration Unit selection one is calibrated the default described frequency of in described frequency acceptance band, described second computing unit is according to the received signal strength of the described frequency after being calibrated and the difference being stored in the described received signal strength in described memory cell, calculate and export the received signal strength corresponding to all described frequency in described frequency acceptance band, and corresponding described receiving gain.
2. AGC calibration system as claimed in claim 1, it is characterized in that, described gain calibration unit for selecting a described receiving gain as initial receiving gain, and is calibrated all frequencies of calibration that need in described frequency acceptance band according to described initial receiving gain; And
For selecting a described receiving gain, the default frequency of in described frequency acceptance band is calibrated.
3. AGC calibration system as claimed in claim 2, it is characterized in that, described first computing unit comprises:
Signal strength signal intensity acquisition module, corresponding each with the received signal strength of the frequency of described process receiving gain calibration for obtaining;
Computing module, connects described signal strength signal intensity acquisition module, for the difference of the received signal strength between every two the adjacent described frequencies of following formulae discovery:
ΔRSSI(k)＝RSSI(k)-RSSI(k-1)；
Wherein,
Δ RSSI (k) represents the difference of the received signal strength between two adjacent described frequencies;
K is more than or equal to 2, and is less than or equal in described frequency acceptance band the sum needing the frequency calibrated.
4. AGC calibration system as claimed in claim 3, is characterized in that, be preset with (k+1) individual described receiving gain in described gain calibration unit.
5. an AGC calibration steps, is applicable to mobile terminal; It is characterized in that, comprising:
Step S1, in a default frequency acceptance band, obtains signal according to a received power preset;
Step S2, calibrates all frequencies in described frequency acceptance band according to an initial receiving gain preset, and obtains the received signal strength of corresponding all described frequencies;
Step S3, calculates the difference of the received signal strength between every two the adjacent described frequencies in described frequency acceptance band, and preserves;
Step S4, changes described receiving gain, calibrates under the described received power preset to the default described frequency of in described frequency acceptance band, and obtains received signal strength corresponding to the frequency that is calibrated;
Step S5, according to the difference of described received signal strength of preserving, calculates the described received signal strength that all the other frequencies in described frequency acceptance band are corresponding, exports the described receiving gain of all described received signal strength and the correspondence calculated;
Step S6, judges whether all frequencies of calibration that need in described frequency acceptance band are all calibrated complete;
If all calibrate complete, then exit;
If do not calibrate complete, then the frequency preset turning to selection one to be not yet calibrated is calibrated, and returns described step S4.
6. AGC calibration steps as claimed in claim 5, is characterized in that, in described step S3, obtains the difference of the received signal strength between every two adjacent described frequencies with following formulae discovery:
ΔRSSI(k)＝RSSI(k)-RSSI(k-1)；
Wherein,
Δ RSSI (k) represents the difference of the received signal strength between two adjacent described frequencies;
K is greater than 2, and is less than or equal in described frequency acceptance band the sum needing the frequency calibrated.
7. AGC calibration steps as claimed in claim 5, is characterized in that, in described step S4, change described receiving gain, first calibrate the described frequency of first in described frequency acceptance band, and obtains received signal strength corresponding to the frequency that is calibrated.
8. AGC calibration steps as claimed in claim 7, is characterized in that, in described step S6, judges that whether the current frequency be calibrated is last frequency in described frequency acceptance band;
If the frequency be calibrated current is last frequency of described frequency acceptance band, then exit;
If the frequency be calibrated current is not last frequency of described frequency acceptance band, then turn to the next frequency of calibration, and return described step S4.
9. AGC calibration steps as claimed in claim 5, is characterized in that, preset multiple described receiving gain, the described receiving gain corresponding for each the frequency corresponding selection one in described frequency acceptance band is calibrated.
10. AGC calibration steps as claimed in claim 6, is characterized in that, presets (k+1) individual described receiving gain, and receiving gain described in one of them is defined as described initial receiving gain.
11. 1 kinds of mobile terminals, is characterized in that, comprise the AGC calibration system as described in claim 1-4.
12. 1 kinds of mobile terminals, is characterized in that, adopt the AGC calibration steps as described in claim 5-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374613.1A CN105450317B (en) | 2014-07-31 | 2014-07-31 | A kind of AGC calibration systems and method and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374613.1A CN105450317B (en) | 2014-07-31 | 2014-07-31 | A kind of AGC calibration systems and method and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105450317A true CN105450317A (en) | 2016-03-30 |
| CN105450317B CN105450317B (en) | 2018-03-30 |
Family
ID=55560157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410374613.1A Active CN105450317B (en) | 2014-07-31 | 2014-07-31 | A kind of AGC calibration systems and method and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105450317B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106332228A (en) * | 2015-06-16 | 2017-01-11 | 联芯科技有限公司 | Frequency sweeping method and device according to frequency band |
| CN108449789A (en) * | 2018-02-27 | 2018-08-24 | 海能达通信股份有限公司 | A kind of AGC gain control device and method |
| CN112996036A (en) * | 2021-02-25 | 2021-06-18 | 展讯通信（深圳）有限公司 | AGC calibration preprocessing method and device, storage medium and terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553582A (en) * | 2003-06-05 | 2004-12-08 | 中兴通讯股份有限公司 | Calibrating apparatus and method for automatic gain control circuit of array receiver |
| US20100007355A1 (en) * | 2008-07-10 | 2010-01-14 | Litepoint Corporation | Method for testing radio frequency (rf) receiver to provide power correction data |
| 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 |
-
2014
- 2014-07-31 CN CN201410374613.1A patent/CN105450317B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553582A (en) * | 2003-06-05 | 2004-12-08 | 中兴通讯股份有限公司 | Calibrating apparatus and method for automatic gain control circuit of array receiver |
| US20100007355A1 (en) * | 2008-07-10 | 2010-01-14 | Litepoint Corporation | Method for testing radio frequency (rf) receiver to provide power correction data |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106332228A (en) * | 2015-06-16 | 2017-01-11 | 联芯科技有限公司 | Frequency sweeping method and device according to frequency band |
| CN108449789A (en) * | 2018-02-27 | 2018-08-24 | 海能达通信股份有限公司 | A kind of AGC gain control device and method |
| CN112996036A (en) * | 2021-02-25 | 2021-06-18 | 展讯通信（深圳）有限公司 | AGC calibration preprocessing method and device, storage medium and terminal |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105450317B (en) | 2018-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101529730B (en) | Controlling the bandwidth of an analog filter | |
| EP3337043B1 (en) | Control circuit and apparatus, radio frequency circuit and apparatus, transceiver, mobile terminal, methods and computer programs for determining calibration values for a radio frequency circuit | |
| CN103444076A (en) | Group delay calibration method for power amplifier envelope tracking | |
| US9270312B2 (en) | Method and apparatus for controlling gain in communicaton system supporting beam forming scheme | |
| CN105450317A (en) | AGC calibration system and method and mobile terminal | |
| US20160077158A1 (en) | Testing device and its calibration method | |
| CN101873617A (en) | Method, system and mobile terminal for radio frequency power calibration | |
| US8787859B2 (en) | Automatic gain control apparatus and method | |
| CN105763269B (en) | For calibrating the method, calibration signal processing unit and system of antenna | |
| CN103636134B (en) | Reception circuit and receiver | |
| CN113708781B (en) | Radio frequency gain control method, device and communication equipment | |
| EP3095190B1 (en) | Method and apparatus for adjusting peak power capability | |
| CN102195582A (en) | AGC (automatic gain control) method and device | |
| CN103634890A (en) | A DPD power amplifier product power scaling method and an apparatus | |
| CN104703268B (en) | filter power compensation method, device and user terminal | |
| CN111147116B (en) | Signal synthesis method and device, storage medium, and electronic device | |
| CN214412706U (en) | Multichannel direct current maladjustment calibrating device | |
| JP7274583B2 (en) | Power adjustment method and device, array antenna, storage medium | |
| US20120238225A1 (en) | Transmission device | |
| CN100417239C (en) | Method of compensating receiving power according to frequency of mobile communication terminal | |
| US10708114B2 (en) | Quadrature radio receiver with gain-dependent mismatch correction | |
| US9473186B2 (en) | Method of controlling receiver gain automatically and apparatus for automatic gain control in receiver | |
| CN105208634B (en) | A kind of RF receiving/transmission device and method and mobile terminal | |
| CN1964213B (en) | A method to improve linearity of radio-frequency power amplifier, system and baseband | |
| JP6817863B2 (en) | Receiver and delay time correction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |