CN102170684A - Automatic gain control method and device - Google Patents
Automatic gain control method and device Download PDFInfo
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- CN102170684A CN102170684A CN2011100755493A CN201110075549A CN102170684A CN 102170684 A CN102170684 A CN 102170684A CN 2011100755493 A CN2011100755493 A CN 2011100755493A CN 201110075549 A CN201110075549 A CN 201110075549A CN 102170684 A CN102170684 A CN 102170684A
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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
Because in the transfer of data, especially the condition of wireless channel not simultaneously, the incoming signal level excursion of radio-frequency transmitter is very big, little to-below the 110db, big to-more than the 10db; When the input signal power is very greatly different, in order to guarantee the linear amplification of radio-frequency transmitter to signal, unsaturated, undistorted, usually need be according to the power of input signal, the AGC of control radio-frequency transmitter (automatic gain control, Automatic Gain Control) gain, Gain Automatic with the adjustment of signal intensity in the amplifying circuit instigated in this AGC gain, thereby makes the output signal of radio-frequency transmitter keep suitable level.
4 AGC gain shift are arranged usually, 4 intervals of corresponding input signal in the transfer of data; As follows:
| The AGC gain shift | Incoming signal level intensity | Can obtain correct |
| Gear | ||
| 3 | ＞＝-45db | Energy |
| Gear 2 | -45db～-65db | Energy |
| Gear 1 | -65db～-87db | Energy |
| Gear 0 | ＜＝-87db | Energy |
When AGC gain shift and input signal coupling, radio-frequency transmitter output appropriate signal; When AGC gain shift and input signal do not match, 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; When receiving next frame, unconditionally use this AGC gain shift; Illustrate: for example, present frame is-50db, and the expected gain gear is 2 grades, and next frame unconditionally uses 2 grades.
State in realization in the process of the control method that is used for transfer of data AGC gain shift, the inventor finds that there are the following problems at least in the prior art:
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 the normal frame (frame that signal is arranged) differs bigger, can cause DTX frame and normal frame to use the different gains gear; When the DTX frame switches to normal frame, can occur using the expectation gear of DTX frame to go to receive normal frame, the expected gain gear selects mistake to cause the received signal distortion, influences transfer of data or voice communication; Give an example as Fig. 1: when present frame was normal frame, present frame was-50db, measured and interrupted, and reported received signal intensity to be-50db, and the expected gain gear is 2 grades, and next frame is the DTX frame, and next frame is-100db to use 2 grades to receive; And at next frame at next constantly as present frame, following next frame is at next during constantly as next frame, therefore the present frame the time is the DTX frame, after using 2 grades to receive, because 2 grades saturated, received signal intensity changes to limit received signal intensity-65db of 2 grades, and adjust automatically and expect that gain shift is 1 grade, and the next frame of this moment is a normal frame, and the normal frame received signal intensity of this moment is-50db to be to use 2 grades to receive, but be to use the expected gain gear to receive for 1 grade, at this moment, it is saturated signal to occur, causes error code.
Summary of the invention
Embodiments of the invention provide a kind of auto gain control method and device, and this method and apparatus all is transformed under the situation of normal frame at the DTX 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 comprises:
The type of the present frame that analysis receives;
When described present frame was the DTX frame, the gain shift of the intensity correspondence of the normal frame received signal that described present frame is before nearest was as next frame signal receiving gain gear.
Automatic gain control equipment comprises:
Analytic unit is used to analyze the type of the present frame that receives;
The first selected unit is used for when described present frame is the DTX frame, and the gain shift of the intensity correspondence of the normal frame received signal that described present frame is before nearest is chosen to be next frame signal receiving gain gear.
The auto gain control method that the embodiment of the invention provides, determine after the type of the present frame that receives by analysis if the DTX frame, the gain shift of the intensity correspondence of then that present frame is before nearest normal frame received signal is as next frame signal receiving gain gear; Like this, just can not appear at present frame is the DTX frame, and next frame is under the situation of normal frame, adopts the pairing 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 invention provides, determine after the type of the present frame that receives of element analysis by analysis if the DTX frame, then, be chosen to be next frame signal receiving gain gear by the gain shift of the first selected unit with the intensity correspondence of normal frame received signal nearest before the present frame; Like this, just can not appear at present frame is the DTX frame, and next frame is under the situation of normal frame, adopts the pairing gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
Description of drawings
Fig. 1 is the flow chart for example of prior art;
Fig. 2 is the flow chart of first kind of embodiment of the present invention;
Fig. 3 is the flow chart of second kind of embodiment of the present invention;
Fig. 4 is a 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
Be described in detail below in conjunction with the auto gain control method and the device of accompanying drawing the embodiment of the invention.
Embodiment one
Referring to Fig. 2, the auto gain control method of the embodiment of the invention may further comprise the steps:
101) analyze the type of the present frame receive;
102) when present frame is the DTX frame, the gain shift of the intensity correspondence of the normal frame received signal that present frame is before nearest is as next frame signal receiving gain gear;
Like this, just can not appear at present frame is the DTX frame, and next frame is under the situation of normal frame, adopts the pairing gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
Embodiment two
Referring to Fig. 3, the auto gain control method of the embodiment of the invention may further comprise the steps:
101) analyze the type of the present frame receive;
102) when present frame is the DTX frame, the gain shift of the intensity correspondence of the normal frame received signal that present frame is before nearest is as next frame signal receiving gain gear;
Like this, just can not appear at present frame is the DTX frame, and next frame is under the situation of normal frame, adopts the pairing 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), when present frame is normal frame, with the gain shift of the intensity correspondence of present frame received signal, as next frame signal receiving gain gear.
Because of when carrying out step 102, present frame is the DTX frame, carries out corresponding operating, carry out step 103 afterwards, reality has been next moment when carrying out step 103, and step 103 is as next present frame constantly, during for normal frame, adopt the concrete operations of step 103.
In the embodiment of the invention, on step 101 and 102 bases; Perhaps on 101,102 and 103 the basis, all can carry out following concrete operations: the type that above-mentioned steps 101 is analyzed the present frame that receives includes but not limited to following mode,
Measure the present frame carrier/interface ratio;
During less than predetermined carrier/interface ratio value, present frame is the DTX frame in carrier/interface ratio,
During more than or equal to predetermined carrier/interface ratio value, present frame is a normal frame in carrier/interface ratio.
Select in the mode of measuring the present frame carrier/interface ratio, in the embodiment of the invention, can on the basis of the predetermined carrier/interface ratio value of mobile phone, adopt the carrier/interface ratio of measurement present frame and predetermined carrier/interface ratio value to compare, 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 invention for predetermined carrier/interface ratio value more than or equal to 2 and smaller or equal to 3, this scope is the most accurate for the judgement of present frame type.
Fig. 4 is a kind of figure of illustrating that provides in the embodiment of the invention, no matter is at embodiment one or on the basis of embodiment two, all is suitable for giving an example of Fig. 4, and concrete condition is as follows:
When present frame was normal frame, present frame was-50db, measured to interrupt, and reported received signal intensity to be-50db, and the expected gain gear is 2 grades, and next frame is the DTX frame, and next frame is-100db to use 2 grades to receive; And at next frame at next constantly as present frame, following next frame is at next during constantly as next frame, therefore the present frame the time is the DTX frame, after using 2 grades to receive, because 2 grades saturated, received signal intensity changes to limit received signal intensity-65db of 2 grades, and adjust automatically and expect that gain shift is 1 grade, after the method for using the embodiment of the invention, draw, on the basis of DTX frame as present frame, do not use its expection gain shift to receive for 1 grade, but adopt the expected gain gear of the before nearest normal frame of DTX frame to receive for 2 grades, at this moment measure to interrupt reporting and since this process adopt be 2 grades and receive that signal is distortion not, do not influence number transfer performance and voice communication, and error code do not occur.
Embodiment three
Referring to Fig. 5, automatic gain control equipment of the present invention comprises as lower unit:
The first selected unit 2 is used for when present frame is the DTX frame, and the gain shift of the intensity correspondence of the normal frame received signal that present frame is before nearest is chosen to be next frame signal receiving gain gear.
Like this, just can not appear at present frame is the DTX frame, and next frame is under the situation of normal frame, adopts the pairing gear of DTX frame to go to receive the situation of normal frame, thereby effectively reduces the error rate of normal frame.
Embodiment four
Referring to Fig. 6, automatic gain control equipment of the present invention comprises as lower unit:
The first selected unit 2 is used for when present frame is the DTX frame, and the gain shift of the intensity correspondence of the normal frame received signal that present frame is before nearest is chosen to be next frame signal receiving gain gear.
Like this, just can not appear at present frame is the DTX frame, and next frame is under the situation of normal frame, adopts the pairing 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 the above-mentioned analytic unit 1 and the first selected unit 2, increase by the second selected unit 3, when present frame is normal frame, with the gain shift of the intensity correspondence of present frame received signal, as next frame signal receiving gain gear.
Because of selecting unit 2 first, present frame is the DTX frame, carry out corresponding operating, enter the second selected unit 3 afterwards, when carrying out the second selected unit 3 reality for next constantly, and the second selected unit 3 during for normal frame, adopts the concrete operations of the second selected unit 3 as next present frame constantly.
In the embodiment of the invention, the analytic unit 1 and the first selected unit 2 basic on; Perhaps 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,
Select in the mode of measuring subelement 11 measurement present frame carrier/interface ratios, in the embodiment of the invention, can on the basis of the predetermined carrier/interface ratio value of mobile phone, adopt the carrier/interface ratio of measuring present frame and the carrier/interface ratio value of being scheduled to compare, 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 invention for predetermined carrier/interface ratio value more than or equal to 2 and smaller or equal to 3, this scope is the most accurate for the judgement of present frame type.
The embodiment of the invention is applied to communication technical field, is mainly used in auto gain control method and device.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly pass through hardware, but the former is better execution mode under a lot of situation.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 that can read, floppy disk as computer, hard disk or CD etc., comprise that some instructions are with so that an electronic equipment (can be mobile phone, computer etc.) is carried out the described method of each embodiment of the present invention.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (8)
1. auto gain control method is characterized in that, comprising:
The type of the present frame that analysis receives;
When described present frame was the DTX frame, the gain shift of the intensity correspondence of the normal frame received signal that described present frame is before nearest was as next frame signal receiving gain gear.
2. auto gain control method according to claim 1 is characterized in that, described method also comprises:
When described present frame is normal frame, with the gain shift of the intensity correspondence of described present frame received signal, as next frame signal receiving gain gear.
3. auto gain control method according to claim 1 and 2 is characterized in that, the type of the present frame that described analysis receives comprises:
Measure the present frame carrier/interface ratio;
During less than predetermined carrier/interface ratio value, described present frame is the DTX frame in carrier/interface ratio,
During more than or equal to predetermined carrier/interface ratio value, described present frame is a normal frame in carrier/interface ratio.
4. auto gain control method according to claim 3, described predetermined carrier/interface ratio value is more than or equal to 2 and smaller or equal to 3.
5. automatic gain control equipment is characterized in that, comprising:
Analytic unit is used to analyze the type of the present frame that receives;
The first selected unit is used for when described present frame is the DTX frame, and the gain shift of the intensity correspondence of the normal frame received signal that described present frame is before nearest is chosen to be next frame signal receiving gain gear.
6. automatic gain control equipment according to claim 5 is characterized in that, described device also comprises:
The second selected unit is used for when described present frame is normal frame, and the gain shift with the intensity correspondence of described present frame received signal is chosen to be next frame signal receiving gain gear.
7. according to claim 5 or 6 described automatic gain control equipments, it is characterized in that described analytic unit comprises:
Measure subelement, be used to measure the present frame carrier/interface ratio;
Handle subelement, be used for during less than predetermined carrier/interface ratio value, described present frame being judged to be the DTX frame in carrier/interface ratio; During more than or equal to predetermined carrier/interface ratio value, described present frame is judged to be normal frame in carrier/interface ratio.
8. automatic gain control equipment according to claim 7 is characterized in that, described predetermined carrier/interface ratio value is more than or equal to 2 and smaller 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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| 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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| CN102170684A true CN102170684A (en) | 2011-08-31 |
| CN102170684B CN102170684B (en) | 2014-12-03 |
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| CN201110075549.3A Active CN102170684B (en) | 2011-03-28 | 2011-03-28 | Automatic gain control method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105207961A (en) * | 2015-10-10 | 2015-12-30 | 北京中科汉天下电子技术有限公司 | Signal carrier-to-interference ratio and signal gain estimation method and circuit |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040196931A1 (en) * | 2003-04-04 | 2004-10-07 | Ti-Wen Yuan | Automatic gain control method and apparatus in communication system having discontinuous transmission mode |
| 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 |
-
2011
- 2011-03-28 CN CN201110075549.3A patent/CN102170684B/en active Active
Patent Citations (3)
| 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 |
| US20040196931A1 (en) * | 2003-04-04 | 2004-10-07 | Ti-Wen Yuan | Automatic gain control method and apparatus in communication system having discontinuous transmission mode |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105207961A (en) * | 2015-10-10 | 2015-12-30 | 北京中科汉天下电子技术有限公司 | Signal carrier-to-interference ratio and signal gain estimation method and circuit |
| 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 |
| 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 |
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| CN102170684B (en) | 2014-12-03 |
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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. |