CN102170684B - Automatic gain control method and device - Google Patents
Automatic gain control method and device Download PDFInfo
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- CN102170684B CN102170684B CN201110075549.3A CN201110075549A CN102170684B CN 102170684 B CN102170684 B CN 102170684B CN 201110075549 A CN201110075549 A CN 201110075549A CN 102170684 B CN102170684 B CN 102170684B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses an automatic gain control method and an automatic gain control device, which relate to the technical field of communication. The bit error rate of a normal frame can be reduced under the condition of switching a discontinuous transmission (DTX) frame to the normal frame. The automatic gain control method provided by the invention comprises the following steps of: analyzing the type of a received current frame; and if the current frame is the DTX frame, selecting a gain grade corresponding to the intensity of a signal received by the normal frame before and the closest to the current frame as the signal receiving gain grade of the next frame. The automatic gain control device provided by the invention comprises an analysis unit and a first selection unit, wherein the analysis unit is used for analyzing the type of the received current frame; and the first selection unit is used for selecting the gain grade corresponding to the intensity of the signal received by the closest normal frame before the current frame as the signal receiving gain grade of the next frame if the current frame is the DTX frame.
Description
Technical field
The present invention relates to communication technical field, relate in particular to auto gain control method and device.
Background technology
In transfer of data, when especially the condition of wireless channel is different, the incoming signal level excursion of radio-frequency transmitter is very large, little arriving-and below 110db, large arriving-more than 10db; In the time that input signal power is very greatly different, in order to ensure that radio-frequency transmitter amplifies the linearity of signal, unsaturated, undistorted, conventionally need to be according to the power of input signal, control AGC (automatic gain control, the Automatic Gain Control) gain of radio-frequency transmitter, Gain Automatic with signal strength signal intensity adjustment in amplifying circuit instigated in this AGC gain, thereby makes the output signal of radio-frequency transmitter keep suitable level.
In transfer of data, conventionally there are 4 AGC gain shift, 4 intervals of corresponding input signal; As follows:
| AGC gain shift | Incoming signal level intensity | Can obtain correct output signal |
| Gear 3 | ＞＝-45db | Energy |
| Gear 2 | -45db～-65db | Energy |
| Gear 1 | -65db～-87db | Energy |
| Gear 0 | ＜＝-87db | Energy |
In the time that AGC gain shift is mated with input signal, radio-frequency transmitter is exported suitable signal; In the time that AGC gain shift is not mated with input signal, may cause output signal too small or saturated.
The control method of the existing AGC gain shift of GSM (mobile communcations system) is: according to the signal strength signal intensity of present frame, and the AGC gain shift of selected next frame; In the time receiving next frame, unconditionally use this AGC gain shift; Illustrate: for example, present frame is-50db, and expected gain gear is 2 grades, and next frame unconditionally uses 2 grades.
State in realization in the process for the control method of transfer of data AGC gain shift, inventor finds that in prior art, at least there are the following problems:
When network side is enabled DTX (Discontinuous Transmission, discontinuous transmission, also can be regarded as the frame of no signal) after, the appearance position of unpredictable DTX frame, and the signal strength signal intensity between DTX frame and normal frame (having the frame of signal) differs larger, can cause DTX frame and normal frame to use different gains gear; In the time that DTX frame is switched to normal frame, there will be and use the expectation gear of DTX frame to go to receive normal frame, expected gain gear selects mistake to cause receiving distorted signals, affects transfer of data or voice communication; As Fig. 1 gives an example: in the time that present frame is normal frame, present frame is-50db, measure and interrupt, report received signal strength to be-50db, expected gain gear is 2 grades, and next frame is DTX frame, next frame is-100db to use 2 grades to receive; And at next frame in next moment as present frame, lower next frame is in next moment during as next frame, because present frame is now DTX frame, after using 2 grades to receive, due to 2 grades saturated, received signal strength changes to the limit received signal strength-65db of 2 grades, and automatically adjust and expect that gain shift is 1 grade, and next frame is now normal frame, normal frame received signal strength is now-50db, should be to use 2 grades to receive, but use 1 grade of expected gain gear to receive, at this moment, there will be signal saturated, cause error code.
Summary of the invention
Embodiments of the invention provide a kind of auto gain control method and device, and the method and device all, in the situation that DTX frame is transformed into normal frame, can reduce the error rate of normal frame.
For achieving the above object, embodiments of the invention adopt following technical scheme:
Auto gain control method, comprising:
The type of the present frame that analysis receives;
In the time that described present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before described present frame, as next frame signal receiving gain gear.
Automatic gain control equipment, comprising:
Analytic unit, for analyzing the type of the present frame receiving;
The first selected unit, in the time that described present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before described present frame, is chosen to be next frame signal receiving gain gear.
The auto gain control method that the embodiment of the present invention provides, after the type of the present frame receiving by analysis, determine if DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before present frame, as next frame signal receiving gain gear; Like this, just there will not be at present frame is DTX frame, in the situation that next frame is normal frame, adopts the corresponding gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
The automatic gain control equipment that the embodiment of the present invention provides, after the type of the present frame that element analysis receives by analysis, determine if DTX frame, select unit by the gain shift corresponding to intensity of normal frame received signal nearest before present frame by first, be chosen to be next frame signal receiving gain gear; Like this, just there will not be at present frame is DTX frame, in the situation that next frame is normal frame, adopts the corresponding gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
Brief description of the drawings
Fig. 1 is the flow chart for example of prior art;
Fig. 2 is the flow chart of the first embodiment of the present invention;
Fig. 3 is the flow chart of the second embodiment of the present invention;
Fig. 4 is flow chart for example of the present invention;
Fig. 5 is the schematic diagram of the third embodiment of the present invention;
Fig. 6 is the schematic diagram of the 4th kind of embodiment of the present invention.
Embodiment
Auto gain control method and device below in conjunction with accompanying drawing to the embodiment of the present invention are described in detail.
Embodiment mono-
Referring to Fig. 2, the auto gain control method of the embodiment of the present invention, comprises the following steps:
101) type of the present frame that analysis receives;
102) in the time that present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before present frame, as next frame signal receiving gain gear;
Like this, just there will not be at present frame is DTX frame, in the situation that next frame is normal frame, adopts the corresponding gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
Embodiment bis-
Referring to Fig. 3, the auto gain control method of the embodiment of the present invention, comprises the following steps:
101) type of the present frame that analysis receives;
102) in the time that present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before present frame, as next frame signal receiving gain gear;
Like this, just there will not be at present frame is DTX frame, in the situation that next frame is normal frame, adopts the corresponding gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
On the basis of above-mentioned steps 101 and 102, increase step 103), in the time that present frame is normal frame, by the gain shift corresponding intensity of present frame received signal, as next frame signal receiving gain gear.
Because of in the time carrying out step 102, present frame is DTX frame, carries out corresponding operating, carry out step 103 afterwards, when carrying out step 103, reality has been next moment, and step 103 is as the present frame in next moment, during for normal frame, adopt the concrete operations of step 103.
In the embodiment of the present invention, on step 101 and 102 bases; Or 101, on 102 and 103 basis, all can carry out following concrete operations: the type that above-mentioned steps 101 is analyzed the present frame receiving includes but not limited to following mode,
Measure present frame carrier/interface ratio;
In the time that carrier/interface ratio is less than predetermined carrier/interface ratio value, present frame is DTX frame,
In the time that carrier/interface ratio is more than or equal to predetermined carrier/interface ratio value, present frame is normal frame.
Select in the mode of measuring present frame carrier/interface ratio, in the embodiment of the present invention, can be on the basis of the predetermined carrier/interface ratio value of mobile phone, adopt and measure the carrier/interface ratio of present frame and predetermined carrier/interface ratio value compares, and judge the type of present frame with this.
In the selection of predetermined carrier/interface ratio value, the range of choice in the embodiment of the present invention is that predetermined carrier/interface ratio value is more than or equal to 2 and be less than or equal to 3, and this scope is the most accurate for the judgement of present frame type.
Fig. 4 is that the one providing in the embodiment of the present invention illustrates figure, no matter is at embodiment mono-or on the basis of embodiment bis-, is all suitable for giving an example of Fig. 4, and concrete condition is as follows:
In the time that present frame is normal frame, present frame is-50db, measures and interrupts, and reports received signal strength to be-50db, and expected gain gear is 2 grades, and next frame is DTX frame, and next frame is-100db to use 2 grades to receive, and at next frame in next moment as present frame, lower next frame is in next moment during as next frame, because present frame is now DTX frame, after using 2 grades to receive, due to 2 grades saturated, received signal strength changes to the limit received signal strength-65db of 2 grades, and automatically adjust and expect that gain shift is 1 grade, using after the method for the embodiment of the present invention, draw, on the basis of DTX frame as present frame, do not use 1 grade of its expection gain shift to receive, but adopt 2 grades of the expected gain gears of normal frame nearest before DTX frame to receive, at this moment measure and interrupt reporting, be 2 grades and receive due to what this process adopted, signal is distortion not, do not affect number transfer performance and voice communication, and there is not error code.
Embodiment tri-
Referring to Fig. 5, automatic gain control equipment of the present invention, comprises as lower unit:
Analytic unit 1, for analyzing the type of the present frame receiving;
The first selected unit 2, in the time that present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before present frame, is chosen to be next frame signal receiving gain gear.
Like this, just there will not be at present frame is DTX frame, in the situation that next frame is normal frame, adopts the corresponding gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
Embodiment tetra-
Referring to Fig. 6, automatic gain control equipment of the present invention, comprises as lower unit:
Analytic unit 1, for analyzing the type of the present frame receiving;
The first selected unit 2, in the time that present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before present frame, is chosen to be next frame signal receiving gain gear.
Like this, just there will not be at present frame is DTX frame, in the situation that next frame is normal frame, adopts the corresponding gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
On the basis of above-mentioned analytic unit 1 and the first selected unit 2, increase by the second selected unit 3, in the time that present frame is normal frame, by the gain shift corresponding intensity of present frame received signal, as next frame signal receiving gain gear.
Because selecting unit 2 first, present frame is DTX frame, carry out corresponding operating, enter afterwards the second selected unit 3, when carrying out the second selected unit 3, reality has been next moment, and the second selected unit 3 is as the present frame in next moment, during for normal frame, adopt the concrete operations of the second selected unit 3.
In the embodiment of the present invention, analytic unit 1 and the first selected unit 2 basic on; Or on the basis of analytic unit 1, the first selected unit 2 and the second selected unit 3, all can carry out following concrete operations: above-mentioned analytic unit 1 includes but not limited to as lower unit,
Measure subelement 11, for measuring present frame carrier/interface ratio;
Process subelement 12, when be less than predetermined carrier/interface ratio value in carrier/interface ratio, present frame is judged to be to DTX frame, in the time that carrier/interface ratio is more than or equal to predetermined carrier/interface ratio value, present frame is judged to be to normal frame.
Measure the mode of present frame carrier/interface ratio selects at measurement subelement 11, in the embodiment of the present invention, can be on the basis of the predetermined carrier/interface ratio value of mobile phone, adopt and measure the carrier/interface ratio of present frame and predetermined carrier/interface ratio value compares, and judge the type of present frame with this.
In the selection of predetermined carrier/interface ratio value, the range of choice in the embodiment of the present invention is that predetermined carrier/interface ratio value is more than or equal to 2 and be less than or equal to 3, and this scope is the most accurate for the judgement of present frame type.
The embodiment of the present invention is applied to communication technical field, is mainly used in auto gain control method and device.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computer, hard disk or CD etc., comprise that some instructions are in order to make an electronic equipment (can be mobile phone, computer etc.) carry out the method described in the present invention each embodiment.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (4)
1. auto gain control method, is characterized in that, comprising:
The type of the present frame that analysis receives, the type of the present frame that described analysis receives comprises: measure described present frame carrier/interface ratio; In the time that described carrier/interface ratio is less than predetermined carrier/interface ratio value, described present frame is discontinuous transmitting DTX frame, and in the time that described carrier/interface ratio is more than or equal to predetermined carrier/interface ratio value, described present frame is normal frame;
In the time that described present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before described present frame, as next frame signal receiving gain gear;
In the time that described present frame is normal frame, by the gain shift corresponding intensity of described present frame received signal, as next frame signal receiving gain gear.
2. auto gain control method according to claim 1, described predetermined carrier/interface ratio value is more than or equal to 2 and be less than or equal to 3.
3. automatic gain control equipment, is characterized in that, comprising:
Analytic unit, for analyzing the type of the present frame receiving, described analytic unit comprises:
Measure subelement, for measuring described present frame carrier/interface ratio; Process subelement, in the time that described carrier/interface ratio is less than predetermined carrier/interface ratio value, described present frame is judged to be to DTX frame; In the time that described carrier/interface ratio is more than or equal to predetermined carrier/interface ratio value, described present frame is judged to be to normal frame;
The first selected unit, in the time that described present frame is DTX frame, by the gain shift corresponding to intensity of normal frame received signal nearest before described present frame, is chosen to be next frame signal receiving gain gear;
The second selected unit, in the time that described present frame is normal frame, by the gain shift corresponding intensity of described present frame received signal, is chosen to be next frame signal receiving gain gear.
4. automatic gain control equipment according to claim 3, is characterized in that, described predetermined carrier/interface ratio value is more than or equal to 2 and be less than or equal to 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110075549.3A CN102170684B (en) | 2011-03-28 | 2011-03-28 | Automatic gain control method and device |
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| CN201110075549.3A CN102170684B (en) | 2011-03-28 | 2011-03-28 | Automatic gain control method and device |
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| CN102170684A CN102170684A (en) | 2011-08-31 |
| CN102170684B true CN102170684B (en) | 2014-12-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103379613A (en) * | 2012-04-17 | 2013-10-30 | 马维尔国际有限公司 | Method and device for automatic multi-slot gain control of TD-SCDMA middle-down links |
| CN105207961B (en) * | 2015-10-10 | 2018-05-22 | 北京中科汉天下电子技术有限公司 | The method of estimation and circuit of a kind of signal carrier/interface ratio and signal gain |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653711A (en) * | 2002-05-22 | 2005-08-10 | 松下电器产业株式会社 | Reception device and reception method |
| CN101959288A (en) * | 2009-07-15 | 2011-01-26 | 展讯通信（上海）有限公司 | Automatic gain control regulating method for received signals and signal receiving equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI260896B (en) * | 2003-04-04 | 2006-08-21 | Mediatek Inc | Wireless communication system with the device that detect transmission mode of communication signal |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653711A (en) * | 2002-05-22 | 2005-08-10 | 松下电器产业株式会社 | Reception device and reception method |
| CN101959288A (en) * | 2009-07-15 | 2011-01-26 | 展讯通信（上海）有限公司 | Automatic gain control regulating method for received signals and signal receiving equipment |
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Effective date of registration: 20210429 Address after: Unit 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong 518040 Patentee after: Honor Device Co.,Ltd. Address before: 518129 headquarters building of Bantian HUAWEI base, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |