CN109861704A - Voice signal AGC control system and method in a kind of Digital Receiver - Google Patents
Voice signal AGC control system and method in a kind of Digital Receiver Download PDFInfo
- Publication number
- CN109861704A CN109861704A CN201811323523.4A CN201811323523A CN109861704A CN 109861704 A CN109861704 A CN 109861704A CN 201811323523 A CN201811323523 A CN 201811323523A CN 109861704 A CN109861704 A CN 109861704A
- Authority
- CN
- China
- Prior art keywords
- gain
- signal
- digital
- energy
- analog
- 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)
- Control Of Amplification And Gain Control (AREA)
Abstract
The invention discloses voice signal AGC control system and methods in a kind of Digital Receiver, by improving existing AGC way to the characteristics of voice signal, it avoids when voice signal pauses, voice noise caused by gain rises immediately sounds phenomenon, it also avoids occurring overflowing plosive phenomenon when voice signal restores, when small one and large one the voice signal for preventing 2 segment signal energy from differing greatly continuously occurs, there is the unclear phenomenon of size phonological detection, substantially improves the sense of hearing of voice signal.
Description
Technical field
The present invention relates to network communication technology fields, it particularly relates to voice signal AGC in a kind of Digital Receiver
Control system and method.
Background technique
Automatic growth control (Automatic Gain Control=AGC) make amplifying circuit Gain Automaticly with signal
Intensity and the autocontrol method adjusted.Realize the circuit abbreviation AGC ring of this function.
For Digital Receiver system, the purpose of gain control is to compensate at Digital Receiver signal
The problem of the dynamic deficiency of ADC chip in reason system in key position, is controlled by gain, although not can solve signal
Absolutely dynamic, but can effectively improve the relative dynamic of signal.And automatic growth control (hereinafter referred to as AGC) is then to need this
Very important person is the working automation that judgement manually controls.
The method that AGC control is generally used closed loop automatic compensation by existing digital receiver system.By detecting signal
The step adjustment of size is fixed in intensity compared with preset signal strength numerical value.Gain amplifier when small signal,
Gain is reduced when big signal, to achieve the effect that the audio signal of output keeps same size.But such control method
There is the problems such as changing signal tone color, influencing voice signal sense of hearing for the adjustment control of voice signal.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For above-mentioned technical problem in the related technology, the present invention proposes voice signal AGC in a kind of Digital Receiver
Control system and method.
The technical scheme of the present invention is realized as follows:
Voice signal AGC control system in a kind of Digital Receiver, comprising:
Signal input apparatus: for receiving signal；
Analog front-end module: connecting with signal output apparatus, is put for inputting a signal into the signal that device receives
Greatly；
Analog gain system: connecting with analog front-end module, for receiving the amplified signal of analog front-end module, and controls
Make the decaying of amplified signal；
Channel mix module: connecting with analog gain system, for by analog gain system treated signal by set
Fixed signal frequency range filters out, and is then mixed to set Frequency point；
Analog-digital converter module: connecting with channel mix module, the signal frequency range for filtering out channel mix module into
Row analog-to-digital conversion；
Digital gain system: connecting with analog-digital converter module, for adjusting the digitlization of analog-digital converter module output
The gain size of signal；
Digital demodulation system: connecting with digital gain system, treated for demodulating digital gain system digitlization language
Sound signal simultaneously controls peripheral hardware instantaneous speech power progress voice output；
AGC control system: for receiving and being adjusted in analog gain system according to the signal of digital demodulation system transmission
Digital gain size in the size of analog gain and digital gain system.
Voice signal AGC control method in a kind of Digital Receiver, uses language in a kind of Digital Receiver
Sound signal AGC control system, comprising the following steps:
S1: to the voice signal X receivednEnergy statistics are carried out, the calculation formula of the energy statistics is；
Yn=Xn×A+Yn-1×(1-A))
Wherein: YnFor the signal energy of statistics；Yn-1The signal energy obtained for last energy statistics；XnIt is connect for n-th
The voice signal of receipts；A is constant；N is positive integer；
S2: when reaching set energy statistics accumulated time, then energy values Y obtained in step S1 is calculated:
Y=20 × log (Yn)×M
Wherein: M is adjusting parameter；
S3: the judgement range that setting energy determines includes determining whether upper limit value and determines lower limit value, to energy number in step 2
Value Y carries out energy judgement after taking logarithm；
And adjustment is controlled according to determining that result correspond to, it specifically includes:
S3-1: when energy, which determines to be greater than, determines upper limit value: then judge whether signal overflows:
When signal overflows, then gain protection signal is controlled, the solution adjusting data of spilling is subjected to gain protection；
When signal does not overflow, then delay waiting is carried out, after reaching set delay time, if signal is still big
In determining upper limit value, then adjust gain, analog gain is lowered；
S3-2: when energy, which determines to be located at, to be determined in range: being then determined as normal voice fluctuation range, do not do analog gain
Adjustment, is finely adjusted digital gain, and adjustment direction is towards the central value direction for determining range；
S3-3: when energy, which determines to be less than, determines lower limit value: delay waiting is then carried out, when reaching the set first stage
Between when: then to analog gain and digital gain be finely adjusted to overall gain rise 10dB, then re-start energy judgement；
Energy, which determines still to be less than, determines lower limit value, then carries out delay waiting, when reaching the set second stage time:
Fine tuning to energy then is continued to analog gain and digital gain and determines that signal energy is greater than judgement lower limit value 3dB, is then stopped
Only analog gain starts digital gain fine tuning；
Further, further include step S4: step 3 signal adjusted is exported.
Further, in step S3, in energy decision process:
Determine that upper limit value is 8dB~12dB smaller than analog-digital converter module spilling upper limit value in system；
Determine lower limit value than determining that upper limit value is 18dB~22dB small；
Determine that the central value of range is equal to the average value for determining upper limit value and determining lower limit value.
Further, in step S3-1, when signal does not overflow, then delay waiting is carried out, in which: when set delay
Between be 2ms.
Further, in step S3-1, when signal does not overflow and be delayed waiting, when in set delay time
Interior, signal, which is less than, determines upper limit value, then controls digital demodulation system and increase the solution adjusting data spilt into buffer area
Benefit protection.
Further, in step S3-1, when controlling gain, analog gain is adjusted to decline 1dB every time；Digital gain adjustment
To decline 0.2dB every time.
Further, in step S3-2, digital gain is finely adjusted, the specific scale that adjusts is 0.005-0.01dB/
10ms。
Further, in step S3-3, when reaching set time first stage to analog gain and digital gain into
During row fine tuning rises 10dB to overall gain, time first stage is 300ms, and analog gain is adjusted to rise 0.2dB every time；
Digital gain is adjusted to rise 0.2dB every time.
Further, in step S3-3, when reaching the set second stage time to analog gain and digital gain after
It is continuous be finely adjusted determine that signal energy is greater than and determines lower limit value 3dB to energy during, the second stage time is 3000ms, simulation
Gain adjustment is to rise 0.2dB every time；Digital gain is adjusted to rise 0.2dB every time.
Beneficial effects of the present invention: it by improving existing AGC way to the characteristics of voice signal, avoids and works as voice
When signal pauses, voice noise caused by gain rises immediately sounds phenomenon, when also avoiding voice signal recovery
Occur overflowing plosive phenomenon, when small one and large one the voice signal for preventing 2 segment signal energy from differing greatly continuously occurs, occur
The unclear phenomenon of size phonological detection, substantially improves the sense of hearing of voice signal.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of module frame chart of voice signal AGC control system in Digital Receiver according to the present invention；
Fig. 2 is a kind of flow diagram of voice signal AGC control method in Digital Receiver according to the present invention；
Fig. 3 be according to the present invention in a kind of Digital Receiver voice signal AGC control method determine to be greater than in energy it is big
System call interception effect picture after determining upper limit value；
Fig. 4 be according to the present invention in a kind of Digital Receiver voice signal AGC control method determine to be greater than in energy it is small
System call interception effect picture after determining lower limit value.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
Voice signal is different with general digital signal, there is the exclusive signal characteristic of their own:
Voice signal is simultaneously discontinuous, and the voice signal including voice often has between hundreds of milliseconds or even several seconds length
Disconnected, this interruption is not to indicate that signal is over, only normal speech pause.
Small when big when speech signal energy, when tone, is low when high.This is all normal energy variation, needs to avoid gain control
System destroys its sense of hearing effect generated.
As shown in Figs 1-4, voice signal AGC control system in a kind of Digital Receiver according to an embodiment of the present invention,
Include:
Signal input apparatus: for receiving signal；In the present embodiment, signal input apparatus is antenna；
Analog front-end module: connecting with signal output apparatus, is put for inputting a signal into the signal that device receives
Greatly；
Analog gain system: connecting with analog front-end module, for receiving the amplified signal of analog front-end module, and controls
Make the decaying of amplified signal；In the present embodiment, analog gain controlled range is 0dB~62dB；
Channel mix module: connecting with analog gain system, for by analog gain system treated signal by set
Fixed signal frequency range filters out, and is then mixed to set Frequency point；
Analog-digital converter module: connecting with channel mix module, the signal frequency range for filtering out channel mix module into
Row analog-to-digital conversion；In the present embodiment: analog-digital converter uses 16 high-speed ADCs；
Digital gain system: connecting with analog-digital converter module, for adjusting the digitlization of analog-digital converter module output
The gain size of signal；In the present embodiment, digital gain controlled range is 0dB~62dB；
Digital demodulation system: connecting with digital gain system, treated for demodulating digital gain system digitlization language
Sound signal simultaneously controls peripheral hardware instantaneous speech power progress voice output；In the present embodiment, demodulation mode is USB (upper side band) sampling
Rate is 32K；
AGC control system: for receiving and being adjusted in analog gain system according to the signal of digital demodulation system transmission
Digital gain size in the size of analog gain and digital gain system.
Voice signal AGC control method in a kind of Digital Receiver uses a kind of digitlization as described in claim 1
Voice signal AGC control system in receiver, signal complete DDC (Digital Down Convert) by fpga chip after ADC chip
It works with energy statistics；
The following steps are included:
S1: to the voice signal X receivednEnergy statistics are carried out, the calculation formula of the energy statistics is；
Yn=Xn×A+Yn-1×(1-A))
Wherein: YnFor the signal energy of statistics；Yn-1The signal energy obtained for last energy statistics；XnIt is connect for n-th
The voice signal of receipts；A is constant；N is positive integer；In the present embodiment, A=2-12。
S2: when reaching set energy statistics accumulated time, then energy values Y obtained in step S1 is calculated:
Y=20 × log (Yn)×M
In the present embodiment, energy statistics accumulated time is configured according to sample rate, generally several hundred microseconds, too long, is reached
Less than the purpose accurately controlled, too small then energy accumulation inaccuracy, specifically energy statistics accumulated time is 0.5ms herein；
Wherein: M is adjusting parameter；It is 0dBc that analog-digital converter module, which overflows upper limit value H, in the system, to guarantee energy
The numerical value of accumulation can just reach this when signal overflows and overflow the upper limit, need to calculate the value of M in advance, specific measuring method is
One signal (ADC can propose overflow alarm) for just reaching the ADC acquisition upper limit is added to ADC, in the present embodiment, measuring and calculating value is
11dBm；Then it calculates:
In the present embodiment；M setting about 1.57.
S3: the judgement range that setting energy determines includes determining whether upper limit value and determines lower limit value, to energy number in step 2
Value Y carries out energy judgement after taking logarithm；
In the present embodiment, in step S3, in energy decision process: overflowing upper limit value H due to analog-digital converter module is
0dBc；Determine that upper limit value takes -12dB；Determine that lower limit value takes -34dB；Then determine that the central value of range is equal to -23dBc.
And adjustment is controlled according to determining that result correspond to, it specifically includes:
S3-1: when energy, which determines to be greater than, determines upper limit value: then judge whether signal overflows:
When signal overflows, then gain protection signal is controlled, the solution adjusting data of spilling is subjected to gain protection；The present embodiment
In, the solution adjusting data in the buffer area overflowed is carried out by gain protection by the gain protection in control digital demodulation system
Make to export sound to be not in spilling plosive；
When signal does not overflow, then delay waiting is carried out, after reaching set delay time, if signal is still big
In determining upper limit value, then adjust gain, analog gain is lowered；In set delay time, signal, which is less than, determines the upper limit
Value, then this may be the big noise plosive of a burst；It will have been spilt into buffer area by controlling digital demodulation system
Solution adjusting data carry out gain protection；Making sound is not in spilling plosive；
In the present embodiment, delay time is set as 2ms；When controlling gain, analog gain is adjusted to decline 1dB every time；Number
Word gain adjustment is every time decline 0.2dB；Specific adjustment effect is as shown in Figure 3.
S3-2: when energy, which determines to be located at, to be determined in range: being then determined as normal voice fluctuation range, do not do analog gain
Adjustment, is finely adjusted digital gain, and adjustment direction is towards the central value direction for determining range；In the present embodiment, to number
Gain is finely adjusted, and the specific scale that adjusts is 0.005-0.01dB/10ms.
S3-3: when energy, which determines to be less than, determines lower limit value: delay waiting is then carried out, when reaching the set first stage
Between when: then to analog gain and digital gain be finely adjusted to overall gain rise 10dB, then re-start energy judgement；This reality
It applies in example, is traditionally arranged to be several hundred milliseconds more than the first ladder time；Specific time first stage is 300ms, simulation herein
Gain adjustment is to rise 0.2dB every time；Digital gain is adjusted to rise 0.2dB every time；
Energy, which determines still to be less than, determines lower limit value, then carries out delay waiting, when reaching the set second stage time:
Fine tuning to energy then is continued to analog gain and digital gain and determines that signal energy is greater than judgement lower limit value 3dB, is then stopped
Only analog gain starts digital gain fine tuning；In the present embodiment, when the second ladder time, is traditionally arranged to be second grade, herein specifically
The second stage time be 3000ms, analog gain is adjusted to rise 0.2dB every time；Digital gain is adjusted to rise every time
0.2dB, specific adjustment effect are as shown in Figure 4.
Further include step S4 in the present embodiment: step 3 signal adjusted is exported.
It can be seen that by means of above-mentioned technical proposal of the invention, it is existing by being improved to the characteristics of voice signal
AGC way avoids when voice signal pauses, and voice noise caused by gain rises immediately sounds phenomenon, also avoids
Occur overflowing plosive phenomenon, small one and large one the language that prevents 2 segment signal energy from differing greatly when voice signal restores
When sound signal continuously occurs, there is the unclear phenomenon of size phonological detection, substantially improve the sense of hearing of voice signal.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. voice signal AGC control system in a kind of Digital Receiver characterized by comprising
Signal input apparatus: for receiving signal；
Analog front-end module: connecting with signal output apparatus, amplifies for inputting a signal into the signal that device receives；
Analog gain system: connecting with analog front-end module, for receiving the amplified signal of analog front-end module, and controls and puts
The decaying of signal after big；
Channel mix module: connecting with analog gain system, for by analog gain system treated signal by set
Signal frequency range filters out, and is then mixed to set Frequency point；
Analog-digital converter module: connecting with channel mix module, and the signal frequency range for filtering out channel mix module carries out mould
Number conversion；
Digital gain system: connecting with analog-digital converter module, for adjusting the digitized signal of analog-digital converter module output
Gain size；
Digital demodulation system: connecting with digital gain system, treated for demodulating digital gain system digitlization voice letter
Number and control peripheral hardware instantaneous speech power carry out voice output；
AGC control system: for receiving and being simulated according to the signal that digital demodulation system transmits to adjust in analog gain system
Digital gain size in the size of gain and digital gain system.
2. voice signal AGC control method in a kind of Digital Receiver, which is characterized in that using as described in claim 1
Voice signal AGC control system in a kind of Digital Receiver, comprising the following steps:
S1: to the voice signal X receivednEnergy statistics are carried out, the calculation formula of the energy statistics is；
Yn=Xn×A+Yn-1×(1-A))
Wherein: YnFor the signal energy of statistics；Yn-1The signal energy obtained for last energy statistics；XnIt is received for n-th
Voice signal；A is constant；N is positive integer；
S2: when reaching set energy statistics accumulated time, then energy values Y obtained in step S1 is calculated:
Y=20 × log (Yn)×M
Wherein: M is adjusting parameter；
S3: the judgement range that setting energy determines includes determining whether upper limit value and determines lower limit value, takes to energy values Y in step 2
Energy judgement is carried out after logarithm；
And adjustment is controlled according to determining that result correspond to, it specifically includes:
S3-1: when energy, which determines to be greater than, determines upper limit value: then judge whether signal overflows:
When signal overflows, then gain protection signal is controlled, the solution adjusting data of spilling is subjected to gain protection；
When signal does not overflow, then delay waiting is carried out, after reaching set delay time, sentenced if signal is still greater than
Determine upper limit value, then adjust gain, analog gain is lowered；
S3-2: when energy, which determines to be located at, to be determined in range: being then determined as normal voice fluctuation range, do not do analog gain tune
It is whole, digital gain is finely adjusted, adjustment direction is towards the central value direction for determining range；
S3-3: when energy, which determines to be less than, determines lower limit value: delay waiting is then carried out, when reaching set time first stage
When: then analog gain and digital gain are finely adjusted to overall gain and rise 10dB, then re-starts energy judgement；
Energy, which determines still to be less than, determines lower limit value, then delay waiting is carried out, when reaching the set second stage time: then right
Analog gain and digital gain continue fine tuning to energy and determine that signal energy is greater than judgement lower limit value 3dB, then stop mould
Quasi- gain starts digital gain fine tuning.
3. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that also
Including step S4: step 3 signal adjusted is exported.
4. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3, in energy decision process:
Determine that upper limit value is 8dB~12dB smaller than analog-digital converter module spilling upper limit value in system；
Determine lower limit value than determining that upper limit value is 18dB~22dB small；
Determine that the central value of range is equal to the average value for determining upper limit value and determining lower limit value.
5. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3-1, when signal does not overflow, then delay waiting is carried out, in which: set delay time is 2ms.
6. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3-1, when signal does not overflow and be delayed waiting, in set delay time, signal, which is less than, determines the upper limit
Value then controls digital demodulation system for the solution adjusting data spilt into buffer area and carries out gain protection.
7. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3-1, when controlling gain, analog gain is adjusted to decline 1dB every time；Digital gain is adjusted to decline 0.2dB every time.
8. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3-2, digital gain is finely adjusted, the specific scale that adjusts is 0.005-0.01dB/10ms.
9. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3-3, analog gain and digital gain are finely adjusted to overall gain when reaching set time first stage and risen
During 10dB, time first stage is 300ms, and analog gain is adjusted to rise 0.2dB every time；Digital gain is adjusted to each
Rise 0.2dB.
10. voice signal AGC control method in a kind of Digital Receiver according to claim 2, which is characterized in that step
In rapid S3-3, fine tuning to energy is continued to analog gain and digital gain when reaching the set second stage time and is determined
Signal energy is greater than during judgement lower limit value 3dB, and the second stage time is 3000ms, and analog gain is adjusted to rise every time
0.2dB；Digital gain is adjusted to rise 0.2dB every time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323523.4A CN109861704B (en) | 2018-11-08 | 2018-11-08 | Voice signal AGC control method in digital receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811323523.4A CN109861704B (en) | 2018-11-08 | 2018-11-08 | Voice signal AGC control method in digital receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109861704A true CN109861704A (en) | 2019-06-07 |
| CN109861704B CN109861704B (en) | 2021-04-06 |
Family
ID=66889883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811323523.4A Active CN109861704B (en) | 2018-11-08 | 2018-11-08 | Voice signal AGC control method in digital receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109861704B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531168A (en) * | 2019-07-22 | 2019-12-03 | 同方电子科技有限公司 | A kind of pulse signal energy detection system and method based on Digital Receiver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545766A (en) * | 2002-04-10 | 2004-11-10 | ��˹��ŵ�� | Device and method for cdma-signal power estimation |
| CN101127932A (en) * | 2007-09-17 | 2008-02-20 | 深圳市力同亚太科技有限公司 | An integrated talk back module and talk back system based on this module |
| CN101447771A (en) * | 2008-12-24 | 2009-06-03 | 北京中星微电子有限公司 | Method and system for automatically controlling gains |
| CN102195677A (en) * | 2010-03-10 | 2011-09-21 | 青岛东软载波科技股份有限公司 | Receiving circuit, transmitting circuit, microcontroller and power-line carrier communication method |
| CN102832958A (en) * | 2011-06-15 | 2012-12-19 | 硅实验室股份有限公司 | Integrated receivers and integrated circuit having integrated inductors |
| CN105515592A (en) * | 2014-09-26 | 2016-04-20 | 苹果公司 | DSP assisted and on demand RF and analog domain processing for low power wireless transceivers |
-
2018
- 2018-11-08 CN CN201811323523.4A patent/CN109861704B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545766A (en) * | 2002-04-10 | 2004-11-10 | ��˹��ŵ�� | Device and method for cdma-signal power estimation |
| CN101127932A (en) * | 2007-09-17 | 2008-02-20 | 深圳市力同亚太科技有限公司 | An integrated talk back module and talk back system based on this module |
| CN101447771A (en) * | 2008-12-24 | 2009-06-03 | 北京中星微电子有限公司 | Method and system for automatically controlling gains |
| CN102195677A (en) * | 2010-03-10 | 2011-09-21 | 青岛东软载波科技股份有限公司 | Receiving circuit, transmitting circuit, microcontroller and power-line carrier communication method |
| CN102832958A (en) * | 2011-06-15 | 2012-12-19 | 硅实验室股份有限公司 | Integrated receivers and integrated circuit having integrated inductors |
| CN105515592A (en) * | 2014-09-26 | 2016-04-20 | 苹果公司 | DSP assisted and on demand RF and analog domain processing for low power wireless transceivers |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531168A (en) * | 2019-07-22 | 2019-12-03 | 同方电子科技有限公司 | A kind of pulse signal energy detection system and method based on Digital Receiver |
| CN110531168B (en) * | 2019-07-22 | 2021-09-28 | 同方电子科技有限公司 | Pulse signal energy detection system and method based on digital receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109861704B (en) | 2021-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2009038809A5 (en) | ||
| KR950011963B1 (en) | Speech processor | |
| CN102231906A (en) | Gain control method and radio remote unit (RRU) | |
| EP2385624B1 (en) | Gain control method, gain control equipment in multiple sound channels system, and voice processing system | |
| RU2002125369A (en) | METHOD AND DEVICE FOR INCREASING INTERFERENCE PROTECTION OF THE RECEIVER | |
| WO2000039923A1 (en) | Communication receiver having reduced dynamic range | |
| EP1129522B1 (en) | Method and apparatus for automatic gain control | |
| KR950000081B1 (en) | Digital signal processor base agc | |
| CN101447771B (en) | Method and system for automatically controlling gains | |
| CN108573709A (en) | A kind of auto gain control method and device | |
| TW200518450A (en) | Automatic gain control device | |
| CN116471656A (en) | Automatic gain control method and device for monitoring receiver | |
| CN108231088B (en) | Fast automatic gain control method and device applied to voice digital signals | |
| CN109861704A (en) | Voice signal AGC control system and method in a kind of Digital Receiver | |
| US6885852B2 (en) | Method and apparatus in a wireless communication device for mitigating a received power overload | |
| US20090010452A1 (en) | Adaptive noise gate and method | |
| US8181082B2 (en) | Wireless receiver system and method with automatic gain control | |
| CN106448690A (en) | Automatic gain control method and device for audio signal | |
| CN102625435A (en) | Automatic gain control (AGC) device for global system for mobile communication (GSM) digital optical fiber frequency-selecting repeater and quick adaptive time slot method for AGC device | |
| JP2019169861A (en) | Receiver and program | |
| GB2355607A (en) | Digital automatic gain control for speech signals | |
| US5983080A (en) | Apparatus and method for generating voice signals at a wireless communications station | |
| CN109586740B (en) | System and method for automatically muting human voice signal in digital receiver | |
| CN103296986B (en) | A kind of auto gain control method and device | |
| CN107769798A (en) | A kind of method and device for controlling radio frequency output signal power invariability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |