CN110034774A - A kind of speed automatic gain control AGC method - Google Patents
A kind of speed automatic gain control AGC method Download PDFInfo
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- CN110034774A CN110034774A CN201910292107.0A CN201910292107A CN110034774A CN 110034774 A CN110034774 A CN 110034774A CN 201910292107 A CN201910292107 A CN 201910292107A CN 110034774 A CN110034774 A CN 110034774A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 230000006870 function Effects 0.000 claims description 8
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
The invention belongs to wireless communication technology fields, are related to automatic growth control AGC, are specifically designed a kind of rapid automatic gain control method.Method of the invention is mainly by the way of adaptively adjusting, corresponding power level is obtained after analog-to-digital conversion to signal is received, pass through the comparison operation with Reference power levels, obtain current absolute power, again to be expected absolute power as target, the channel gain G that AGC needs to adjust is obtained by rapid computations.It in order to save operation time, is segmented according to performance number, calculates the corresponding yield value of each piecewise interval in advance, and be stored in memory in initialization, after bringing into operation, directly Current power level is compared, and adjust corresponding channel gain G.The present invention, which only needs the level of a cycle to compare, can prepare to be efficiently obtained the channel gain for needing to adjust, so that the time consumed by AGC adjustment is preferably minimized, reach the requirement of system real time.
Description
Technical field
The invention belongs to wireless communication technology fields, are related to automatic growth control AGC, are specifically designed a kind of fast automatic increasing
Beneficial control method.
Background technique
In air-ground integrated data transmission system, it is most important that the quality of received signal quality becomes Handover
Assess parameter.The size of received signal power is that signal quality most intuitively embodies, therefore, the accurate meter of received signal power
It calculates, directly determines the accuracy and reliability of system group network.
When in airborne while effective range of receiving positioned at the two or more base stations in ground, multiple base stations can be airborne
When effective transmission time slot, starts simultaneously at and AGC adjustment is carried out to received airborne signal, when reception convergence signal to optimum reception model
When enclosing interior, AGC adjustment stops, and the digital signal amplitude by the reception control gain of analog end and digital end is reported to ARM at this time,
ARM calculates watt level, and gives Telemetering Net System management software by network transmission, and management software is according to the big of performance number
It is small, optimum reception base station is sent instructions to, optimum reception base station sends out Optimal Signals data, to complete transregional cut
It changes.
Since realistic simulation input signal exports after ADC sampling, range value is not a fixed value, after making
The demodulation synchronization loop steady operation at end needs to control input signal in a small range.Generally by AGC to input
Signal carries out power adjustment.
The AGC function that the prior art uses ADC to carry, and current signal strength is indicated by the register of RSSI function.
But the prior art needs the mode for reading register by SPI to obtain performance number, since the rate of SPI interface is slower, reads more
The elapsed time that a performance number carries out AGC again can be very long, then to the time consumed by multiple multiple AGC for receiving front, much
More than the index of system, it is unable to satisfy the real-time of system.
Summary of the invention
It is to be solved by this invention, aiming at the defect of the prior art, propose a kind of speed automatic gain control side AGC
Method meets the real-time demand of system.
A kind of speed automatic gain control AGC method characterized by comprising
By the way of adaptively adjusting, corresponding power level is obtained after analog-to-digital conversion to signal is received, by with base
The comparison operation of quasi- power level obtains current absolute power, then to be expected absolute power as target, is obtained by rapid computations
AGC needs the channel gain G adjusted.
The method of adjustment of the gain is:
To received analog signal after analog-digital converter samples, the sample sequence r (n) that length is L is chosen, to the sequence
Column divide summation sum (L) equally:
It averages again: ave (L)=sum (L)/L；
Obtain the power level of current Received Signal: Pc=ave (L)
Further according to desired power P e calculating difference Gd:
Channel gain G is adjusted according to calculated result Gd:
G=Gd
In order to further increase efficiency, in the adjustment to channel gain G, by formula
In log arithmetic section, be segmented according to performance number, calculate the corresponding gain of each piecewise interval in advance
Value, and be stored in memory in initialization, after bringing into operation, directly Current power level is compared, and adjustment pair
The channel gain answered.
Beneficial effects of the present invention are, by way of adaptively adjusting, can reduce the acquisition time of performance number, and pass through
Preparatory operation segmented power value is deposited in memory in initialization, in the process of running, only needs a cycle
Level, which compares, can prepare to be efficiently obtained the channel gain for needing to adjust, so that the time consumed by AGC adjustment be dropped to most
It is low, reach the requirement of system real time.
Detailed description of the invention
Fig. 1 is AGC logical blocks figure of the invention；
Fig. 2 is embodiment logical schematic.
Specific embodiment
With reference to the accompanying drawings and examples, the technical schemes of the invention are described in detail:
As shown in Figure 1, being AGC block diagram of the invention, in the solution of the present invention, by obtaining corresponding function after analog-to-digital conversion
Rate level, and calculates and the segmented power section that is stored in memory is compared in initialization in advance, directly obtains AGC
The channel gain G for needing to adjust.
In order to further embody practicability of the invention, the present invention is carried out below with reference to specific application scenarios further
Explanation:
By taking the ADC of model AD9361 as an example, AD9361 oneself has AGC function, can be easily to reception signal
It is restrained, but since it indicates that the mode that the RSSI function of current signal strength will lean on SPI to read register obtains performance number,
It is unable to satisfy the real-time of system, therefore combines the solution of the present invention, the MGC function of AD9361 can be used, and in the base of MGC
On plinth, AGC function is realized in fpga logic.
Total time slot of system is limited, in order to improve system performance, it is necessary to guarantee to receive the convergence of signal in first time, because
This is detecting reception signal for the first time, and after calculating the digital power intensity of current demand signal, it is necessary to fall into a trap in next cycle
Calculate Contemporary Digital power level and it is desirable that convergence intensity difference dB value, guarantee next adjustment period arriving
When, corresponding simulation reception gain can be given at once, convergence signal will be received, with Contemporary Digital power level and it is desirable that
Convergence intensity phase difference is Gd, and Contemporary Digital power level is Pc, and desired convergence intensity is Pe, then:
FPGA multiplier resources abundant can easily do quadratic sum operation in fpga logic, but log operation exists
Realize that difficulty is very big in fpga logic, elapsed time is very long, therefore can handle in a manner of tabling look-up.Each gear is corresponding
Log value calculated in advance by ARM, and be stored in memory in initialization, the comparison of corresponding and desired value needs what is adjusted to connect
Gain is received, for following table 1:
Table 1 is corresponding and desired value compares the reception gain for needing to adjust
Embodiment
This example is applied scheme of the present invention in specific air-ground integrated data transmission system, such as Fig. 2
Shown, the system is wide by airborne C-band broadband wireless network transceiver, airborne C-band wideband power amplifer, ground C-band
Band wireless network transceiver, ground C-band wideband power amplifer, application software system and matched airborne antenna, ground
More front antennas are constituted according to the test of empty Incorporate and telemetry network general architecture.Technical solution of the present invention is at this
Application in example is mainly reflected in ground C-band broadband wireless network transceiver, ground C-band wideband power amplifer and ground
More front antennas.
Terrestrial receiving antenna of the electromagnetic horn as system is used in this example, is made of 34 fronts, is divided into three layers,
First layer corresponds to a prevention at radio-frequency port, and the second layer and third layer correspond to another prevention at radio-frequency port, be linked into connecing for base station type power amplifier
Receiving end.The switch arrays that more fronts are made of 10 TTL signals carry out switching, and with the radio frequency of base station type power amplifier 1 and penetrate
Frequently 2 switches are associated, such as table 2:
Table 2 switchs table corresponding with loudspeaker label
In flight test C-band network receive-transmit system, base station type equipment and airborne end equipment constitute air-ground integrated
Data transmission system, when airborne equipment appears in the wireless range of base station type equipment covering, base station type equipment needs logical
Multiple fronts of overpolling electromagnetic horn find target at the first time, compare the watt level of each front, determine that power is most strong
Person is optimal quality of reception front, and uploads front performance number at the first time, is provided for Telemetering Net System management software transregional
The data supporting of switching, and this whole process has to complete in the very short time.Time cost is bigger, the optimal reception of poll
The front accuracy of quality is lower, protects expense longer before the time slot of whole system, the precision of Handover is lower.
In base station type transceiver, AD9361 offer included AGC module and RSSI signal amplitude monitoring function, however its
The performance number for obtaining each front is Millisecond, and 34 front overheads can reach a few tens of milliseconds, be unable to satisfy system requirements.
Therefore the reception gain of analog end is adjusted using the MGC of AD9361, with 100MHz clock to refer in logic, with
The mode of AD9361 pin directly controls the size of reception gain, and high and low thresholds determine and the automatic gain control of AGC netlist composition
Molding block can be such that the AGC an of front controls within 100ns, AGC convergence signal and power acquisition time 100us with
It is interior.After 34 front polls, determines optimal quality of reception front, can complete within 3.5ms, be instructed by condition monitoring
It is reported to Telemetering Net System management software and carries out Handover judgement and operation, total time is optimal according to the division of total time slot
It can be within 10ms.
It can be seen that the solution of the present invention can be improved efficiency effectively compared to currently used method, meet system
Real-time.
Claims (2)
1. a kind of speed automatic gain controls AGC method characterized by comprising
By the way of adaptively adjusting, corresponding power level is obtained after analog-to-digital conversion to signal is received, by with benchmark function
The comparison operation of rate level obtains current absolute power, then to be expected absolute power as target, obtains AGC by rapid computations
The channel gain G for needing to adjust, specifically:
To received analog signal after analog-digital converter samples, the sample sequence r (n) that length is L is chosen, to the sequence
Divide summation sum (L) equally:
It averages again: ave (L)=sum (L)/L；
Obtain the power level of current Received Signal: Pc=ave (L)
Further according to desired power P e calculating difference Gd:
Channel gain G is adjusted according to calculated result Gd:
G=Gd.
2. a kind of speed automatic gain according to claim 1 controls AGC method, which is characterized in that described to increase to channel
In the adjustment of beneficial G, by formula
In log arithmetic section, be segmented according to performance number, calculate the corresponding yield value of each piecewise interval in advance, and
It is stored in memory in initialization, after bringing into operation, directly Current power level is compared, and adjust corresponding logical
Road gain, the Gd value of piecewise interval obtain as follows:
:
:
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| CN201910292107.0A CN110034774A (en) | 2019-04-12 | 2019-04-12 | A kind of speed automatic gain control AGC method |
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| CN201910292107.0A CN110034774A (en) | 2019-04-12 | 2019-04-12 | A kind of speed automatic gain control AGC method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212007A (en) * | 2020-04-20 | 2020-05-29 | 成都新动力软件有限公司 | Universal 600Mbps intermediate-speed demodulator implementation method and modem |
| CN113473588A (en) * | 2020-03-31 | 2021-10-01 | 广州海格通信集团股份有限公司 | Communication signal processing method, communication signal processing apparatus, computer device, and storage medium |
| CN113839635A (en) * | 2021-09-29 | 2021-12-24 | 四川安迪科技实业有限公司 | Anti-interference self-adaptive AGC (automatic gain control) adjusting method and device based on smooth filtering |
| WO2023051509A1 (en) * | 2021-09-28 | 2023-04-06 | 中兴通讯股份有限公司 | Multi-user transmit power gain gear control method and apparatus, and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404309A (en) * | 2002-10-24 | 2003-03-19 | 上海交通大学 | Burst signal detecting and AGC method for orthogonal frequency division multiplexing system |
| CN101171746A (en) * | 2005-03-11 | 2008-04-30 | 高通股份有限公司 | Automatic gain control for a wireless receiver |
| CN105911516A (en) * | 2016-04-08 | 2016-08-31 | 江苏正赫通信息科技有限公司 | Wireless signal multipath parallel amplitude comparison measuring method |
| US20180062891A1 (en) * | 2004-07-26 | 2018-03-01 | Edgewater Wireless Systems Inc. | Automatic Gain Control (AGC) For Multichannel/Wideband Communications System |
-
2019
- 2019-04-12 CN CN201910292107.0A patent/CN110034774A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404309A (en) * | 2002-10-24 | 2003-03-19 | 上海交通大学 | Burst signal detecting and AGC method for orthogonal frequency division multiplexing system |
| US20180062891A1 (en) * | 2004-07-26 | 2018-03-01 | Edgewater Wireless Systems Inc. | Automatic Gain Control (AGC) For Multichannel/Wideband Communications System |
| CN101171746A (en) * | 2005-03-11 | 2008-04-30 | 高通股份有限公司 | Automatic gain control for a wireless receiver |
| CN105911516A (en) * | 2016-04-08 | 2016-08-31 | 江苏正赫通信息科技有限公司 | Wireless signal multipath parallel amplitude comparison measuring method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113473588A (en) * | 2020-03-31 | 2021-10-01 | 广州海格通信集团股份有限公司 | Communication signal processing method, communication signal processing apparatus, computer device, and storage medium |
| CN111212007A (en) * | 2020-04-20 | 2020-05-29 | 成都新动力软件有限公司 | Universal 600Mbps intermediate-speed demodulator implementation method and modem |
| WO2023051509A1 (en) * | 2021-09-28 | 2023-04-06 | 中兴通讯股份有限公司 | Multi-user transmit power gain gear control method and apparatus, and electronic device |
| CN113839635A (en) * | 2021-09-29 | 2021-12-24 | 四川安迪科技实业有限公司 | Anti-interference self-adaptive AGC (automatic gain control) adjusting method and device based on smooth filtering |
| CN113839635B (en) * | 2021-09-29 | 2023-06-20 | 四川安迪科技实业有限公司 | Anti-interference self-adaptive AGC (automatic gain control) adjusting method and device based on smooth filtering |
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Application publication date: 20190719 |