CN103187936B - Fault protection method and device for power amplifier - Google Patents
Fault protection method and device for power amplifier Download PDFInfo
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- CN103187936B CN103187936B CN201110455824.4A CN201110455824A CN103187936B CN 103187936 B CN103187936 B CN 103187936B CN 201110455824 A CN201110455824 A CN 201110455824A CN 103187936 B CN103187936 B CN 103187936B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
- H03F3/245—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages with semiconductor devices only
Abstract
The invention provides a fault protection method and a device for a power amplifier. The fault protection device for the power amplifier comprises a signal generator, a DAC module, a modulation module and a PA (polyamide), and further comprises a signal protector positioned between the signal generator and the DAC module, and a signal control monitor positioned between the signal generator and the signal protector, wherein the signal control monitor is used for real-time monitoring to digital signals output by the signal generator, when abnormality of digital signals is monitored, signal abnormality indicating signals are produced, and the signal abnormality indicating signals are sent to the signal protector; and the signal protector is used for carrying out treatment to digital signals according to the signal abnormality indication signals sent by the signal control monitor and outputting results treated by weighting treatment to the DAC module. The fault protection device and the fault protection method, provided by the invention, can effectively prevent the power amplifier from performance abnormality or overburn.
Description
Technical field
The present invention relates to digital processing field, more particularly to a kind of abnormal protection method and dress of power amplifier
Put.
Background technology
Important component part of the power amplifier as transmitter, is widely used in global system for mobile communications (GSM), individual
The modern times of the various standards such as human hand held formula telephone system (PHS), CDMA (CDMA) and WCDMA (WCDMA) are wireless
In communication system, either base station or repeater, power amplifier is all indispensable and extremely important.Power amplifier
Effect be that the transmission signal of base station transceiver is carried out into power amplification, then amplify radiofrequency signal output arrive base station
Air feedback unit, by base station antenna radiation to aerial, provides reliable wireless communication signals for mobile subscriber terminal.
In wireless base system, in order to improve the efficiency of the coverage and power amplifier of equipment, reduce base station and set
Standby heat consumption, power amplifier often work at high power, and the working environment of physical device is extremely complex.When due to certain
Burst reason, when the input of power amplifier occurs abnormal (such as high-power signal or wide range signal), it is easy to cause power
There is performance and forever declines in amplifier, and even results in and burns.The property abnormality of power amplifier burns, and on the one hand can increase base
The maintenance of equipment cost of station equipment provider, on the other hand can affect the proper communication of equipment, so as to affect mobile operator to
User provides the ability of regular traffic.Therefore, it is necessary to improve power amplifier using a kind of technology answer to abnormal signal
To ability.Traditionally, Jing often increases some current/voltages detection circuits inside or outside power amplifier and puts improving power
The Anti-burnout ability of big device, but, this can not only increase the cost and volume of transmitter/power amplifier, and in analog domain
Carry out signal processing often more complicated.
The content of the invention
The abnormal protection method and device of a kind of power amplifier are embodiments provided, to solve to put not increasing
In the case of the cost and volume of big device, prevent power amplifier from property abnormality or the problem burnt occur.
A kind of abnormal protection device of power amplifier is embodiments provided, is produced including the signal being sequentially connected
Device, digital-to-analogue conversion (DAC) module, modulation module and power amplifier (PA), the device are also included positioned at the signal generator
And the signal protection device between the DAC module and the prison of the signal between the signal generator and the signal protection device
Control device, wherein：
The signal monitor, for carrying out real-time monitoring to the digital signal that the signal generator is exported, works as monitoring
When occurring abnormal to the digital signal, abnormal signal indication signal is produced, and it is different the signal to be sent to the signal protection device
Normal indication signal；
The signal protection device, for the abnormal signal indication signal sent according to the signal monitor, to institute
State digital signal to be processed, and the result after weighting is processed is exported to the DAC module.
Preferably, the signal monitor includes power computation module, Filtering Processing module, power Spectral Estimation module, mistake
Difference computing module and judging module, wherein：
The power computation module, export after the instantaneous power of the digital signal for calculating；
The Filtering Processing module, obtains for being filtered process to the instantaneous power that the power computation module is exported
Export after the mean power of the digital signal；
The power Spectral Estimation module, for estimating to export after the power spectrum of the digital signal；
The error calculating module, for the power spectrum that exported according to the power Spectral Estimation module and default baseline spectrum
Export after calculating error of frequency domain；
The judging module, based on respectively by the power computation module, the Filtering Processing module and the error
The output for calculating module is compared with pre-configured decision threshold, determines that the digital signal occurs in time domain or frequency domain abnormal
Afterwards, abnormal signal indication signal is produced, and the abnormal signal indication signal is sent to the signal protection device.
Preferably, the judging module, specifically for the output according to the error calculating module and frequency domain decision thresholding
After determining that the digital signal has error of frequency domain, abnormal signal indication signal is produced, and is sent to the signal protection device
The abnormal signal indication signal；Or
In the presence of the digital signal is determined according to the output of the power computation module and the instantaneous decision threshold of time domain
After the error of domain, abnormal signal indication signal is produced, and the abnormal signal indication signal is sent to the signal protection device；Or
According to the output of the Filtering Processing module and time domain it is long when decision threshold determine that the digital signal is present
After time domain error, abnormal signal indication signal is produced, and the abnormal signal indication signal is sent to the signal protection device.
Preferably, the error calculating module, specifically for calculating error of frequency domain using equation below：
Wherein, P (k), E (n) are respectively power spectrum and error of frequency domain, and k is peak frequency sequence, and α is Dynamic gene, Pmin、
PmaxRespectively power spectrum minimum and maximum thresholding, P0On the basis of compose, Emin、EmaxThe respectively minima and maximum of error of frequency domain
Value.
Preferably, the signal protection device includes time delay module, power window module, Leveling Block and selecting module, wherein：
The time delay module, it is defeated after delay process for carrying out to the digital signal that the signal generator is exported
Go out；
The power window module, the abnormal signal indication signal for being sent according to the signal monitor produce weighting windows sequence
Row；
The Leveling Block, for the abnormal signal indication signal that sent according to the signal monitor and the power window mould
The weighting window sequence that block is produced, exports after being smoothed to the digital signal；
The selecting module, for the abnormal signal indication signal that sent according to the signal monitor in the time delay mould
Selected between the output of block and the output of the Leveling Block, and to the DAC module export selected resultses.
Preferably, the Leveling Block, specifically for：When the abnormal signal indication signal is low level, not to institute
State digital signal to be processed, when the abnormal signal indication signal is rising edge, the digital signal just weighted,
Or, it is when the abnormal signal indication signal is trailing edge, counter to the digital signal to be weighted.
Preferably, the Leveling Block, specifically for being processed to the digital signal using equation below：
Wherein, x (n), s (n) are respectively the digital signal before smoothing processing and the digital signal after smoothing processing, and w (n) is
Power window, L are power window length, and Flg is abnormal signal indication signal, and n is time serieses, and Posedge is the rising edge,
Negedge is the trailing edge.
The embodiment of the present invention additionally provides a kind of abnormal protection method of power amplifier, and the method includes：
Digital signal to being intended to input power amplifier carries out delay process；
Digital signal to being intended to input power amplifier carries out real-time monitoring, when monitoring that it is abnormal that the digital signal occurs
When, produce abnormal signal indication signal；According to the abnormal signal indication signal, the digital signal is smoothed；
According to the abnormal signal indication signal, to being smoothed after signal and the signal after delay process carry out
Export after selection.
Preferably, the digital signal of described pair of desire input power amplifier carries out real-time monitoring, when monitoring the numeral
When signal occurs abnormal, abnormal signal indication signal is produced, including：
Calculate the instantaneous power of the digital signal；
Instantaneous power to calculating is filtered and processes the mean power for obtaining the digital signal；
Estimate the power spectrum of the digital signal, error of frequency domain is calculated with default baseline spectrum according to the power spectrum；
Respectively the instantaneous power, the mean power and the error of frequency domain and pre-configured decision threshold are compared
Compared with determining the digital signal after exception occur in time domain or frequency domain, produce abnormal signal indication signal.
Preferably, it is described the digital signal to be smoothed according to the abnormal signal indication signal, including：
According to the abnormal signal indication signal, weighting window sequence is produced；
When the abnormal signal indication signal is low level, the digital signal is not processed；When the signal
When abnormal indication signal is rising edge, the digital signal is just weighted；When the abnormal signal indication signal is decline
Along when, it is counter to the digital signal to be weighted.
The abnormal protection method and device of above-mentioned power amplifier, is supervised in real time to the digital signal of power amplifier
Survey, when the digital signal of power amplifier occurs abnormal, advance Digital Signal Processing carried out to input signal in numeric field,
So as to preventing power amplifier from property abnormality occur or burning.And as the abnormal monitoring of power amplifier all enters in numeric field
OK, can be realized by software programming, so as to improve the realizability and protective capability of power amplifier abnormal protection.
Description of the drawings
Fig. 1 is the structural representation of the abnormal protection device embodiment of power amplifier of the present invention；
Fig. 2 is the structural representation of the signal monitor embodiment in Fig. 1 shown devices；
Fig. 3 is the structural representation of the signal protection device embodiment in Fig. 1 shown devices；
Fig. 4 is the structural representation of the abnormal protection device application example of power amplifier of the present invention；
Fig. 5 is the flow chart of the abnormal protection method embodiment of power amplifier of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutual combination in any.
Fig. 1 is the structural representation of the abnormal protection device embodiment one of power amplifier of the present invention, is also that the device exists
Position view in communication system.For communication system transmitter, the signal generator in Fig. 1 was transmitted for baseband pool
Come and pass through the single carrier or multi-carrier signal of other Digital Signal Processing (including molding, speed conversion etc.).Power amplifier
(PA) power amplification is carried out to the radiofrequency signal after modulation, if there is no power amplifier protection transposition in link, works as signal generator
Comprising Digital Signal Processing link occur certain it is abnormal when, for example there is momentary high power signal or signal and lose suddenly etc.,
This performance that may result in power amplifier forever declines or moment burns.
As seen from Figure 1, the abnormal protection device of power amplifier of the present invention includes：Signal generator 11, signal is supervised
Control device 12, signal protection device 13, digital-to-analogue conversion (DAC) module 14, modulation module 15 and PA 16；Wherein above-mentioned signal monitor
It is two modules newly increasing in the embodiment of the present invention with signal protection device.
The signal generator, for exporting the digital signal for producing；
The signal monitor, for carrying out real-time monitoring to the digital signal that the signal generator is exported, works as monitoring
When occurring abnormal to the digital signal, abnormal signal indication signal is produced, and it is different the signal to be sent to the signal protection device
Normal indication signal；
The signal protection device, for the abnormal signal indication signal sent according to the signal monitor, to institute
State digital signal and be weighted process, and the result after weighting is processed is exported to the DAC module；
The DAC module, for digital signal is converted into analogue signal；
The modulation module, the analogue signal modulation for the DAC module is exported arrive radio band；
The PA, carries out power amplification for the analogue signal to being input into.
In addition, above-mentioned signal monitor can include that power computation module 121, Filtering Processing module 122, power spectrum are estimated again
Meter module 123, error calculating module 124 and judging module 125, concrete structure is as shown in Fig. 2 wherein：
, for calculating the instantaneous power of digital signal, there is time domain as input signal instantaneously abnormal in power computation module
Discriminative information；
Filtering Processing module, for being filtered process to the instantaneous power that power computation module is exported, as input letter
Number occur time domain it is long when abnormal discriminative information；
The Filtering Processing mode that the Filtering Processing module is adopted includes but is not limited to following manner：
Y (n)=(1-2-N)*y(n-1)+2-N*x(n) (1)
Y (n)=x (n)-x (n-k)+y (n-1) (3)
Wherein, x (n), y (n) are respectively the input and output of Filtering Processing module；N is time serieses；K is signal delay
Amount；N is regulatory factor.
Power Spectral Estimation module, for estimating the power spectrum of digital signal, for follow-up Error Calculation；
The power Spectral Estimation mode that the power Spectral Estimation module is adopted includes but is not limited to following manner：
Wherein, x (n), P (k) are respectively the input and output of power Spectral Estimation module；K is frequency sequence；N is FFT points
Number；H is to block sequence；M is block length；L is normalization factor.
Error calculating module, for the power spectrum and the default baseline spectrum (base that are exported according to the power Spectral Estimation module
Quasi- spectrum is determined by configuration information) error of frequency domain is calculated, error of frequency domain is calculated, as the judgement letter that input signal frequency domain is abnormal
Breath；
The Error Calculation mode that the error calculating module is adopted includes but is not limited to following manner：
Wherein, P (k), E (n) are respectively power spectrum and error of frequency domain, and k is peak frequency sequence, and α is Dynamic gene, Pmin、
PmaxRespectively power spectrum minimum and maximum thresholding, P0On the basis of compose, Emin、EmaxThe respectively minima and maximum of error of frequency domain
Value.
Judging module, for respectively by the power computation module, the Filtering Processing module and the Error Calculation mould
The output of block is compared with pre-configured decision threshold, is determined the digital signal after exception occur in time domain or frequency domain, is produced
Raw abnormal signal indication signal, and the abnormal signal indication signal is sent to the signal protection device.
Specifically, the judging module, specifically for the output according to the error calculating module and frequency domain decision thresholding
After determining that the digital signal has error of frequency domain, abnormal signal indication signal is produced, and is sent to the signal protection device
The abnormal signal indication signal；Or, institute is determined according to the output of the power computation module and the instantaneous decision threshold of time domain
State after digital signal has time domain error, produce abnormal signal indication signal, and it is different the signal to be sent to the signal protection device
Normal indication signal；Or, according to the output of the Filtering Processing module and time domain it is long when decision threshold determine the numeral
After signal has time domain error, abnormal signal indication signal is produced, and abnormal signal instruction is sent to the signal protection device
Signal.
In addition, signal protection device can include time delay module 131, power window module 132, Leveling Block 133 and select mould again
Block 134, concrete structure is as shown in figure 3, wherein：
Time delay module, the digital signal for exporting to signal generator carry out delay process, and time delay size can basis
Business demand is by software arrangements；
Power window module, suitably weight window sequence for producing according to abnormal signal indication signal, such as Blackman windows,
Kaiser windows and Hamming windows etc., but it is not limited to above-mentioned window function；
Leveling Block, for the abnormal signal indication signal exported according to signal monitoring module, puts down to digital signal
It is sliding to process；
The smoothing processing mode that the Leveling Block is adopted includes but is not limited to following manner：
Wherein, x (n), s (n) are respectively the digital signal before smoothing processing and the digital signal after smoothing processing, and w (n) is
Power window, L are power window length, and Flg is abnormal signal indication signal, and n is time serieses, and Posedge is the rising edge,
Negedge is the trailing edge.
It should be noted that the formula that above-mentioned formula (7) and formula (8) are adopted for the embodiment of the present invention.
The Leveling Block, specifically for：When the abnormal signal indication signal is low level, not to the numeral letter
Number processed, when the abnormal signal indication signal is rising edge, the digital signal is just weighted, or, when
It is when the abnormal signal indication signal is trailing edge, counter to the digital signal to be weighted.
Selecting module, is carried out for being exported and Leveling Block output between in time delay module according to abnormal signal indication signal
Select, export signal after final abnormal protection.
Further, above-mentioned signal generator can include：Baseband pool module, molding filtration and digital up-converter module and
Intermediate frequency algorithm processing module；Wherein, baseband pool module, for producing baseband digital signal；Molding filtration and Digital Up Convert mould
Block, obtains digital intermediate frequency signal for pulse-shaping and digital upconversion process are carried out to baseband digital signal；At intermediate frequency algorithm
Reason module, for other IF process (such as equilibrium, peak clipping, predistortion and quadrature compensation are carried out to digital intermediate frequency signal
Deng)；Certainly, antenna feeder module can be connect after PA, the antenna feeder module is transmitted into the signal after power amplification in the air.The place of other modules
Reason mode is consistent with the processing mode of respective modules in Fig. 1, and here is omitted.
The abnormal protection device of above-mentioned power amplifier is not limited to only enter the power amplifier in communication system transmitter
Row protection, for other systems for being related to power amplification circuit stand good.
The abnormal protection device of above-mentioned power amplifier, is supervised to the input signal of power amplifier in real time in numeric field
Survey, and real-time Digital Signal Processing is carried out to abnormal input signal, improve the Anti-burnout ability of power amplifier so that should
Device is more suitable for the increasingly complex occasion of power amplifier applied environment.
The embodiment of the present invention additionally provides a kind of abnormal protection method of power amplifier, and the method includes：
Step one, the digital signal to being intended to input power amplifier carry out delay process；
Step 2, the digital signal to being intended to input power amplifier carry out real-time monitoring, when monitoring the digital signal
When occurring abnormal, abnormal signal indication signal is produced；According to the abnormal signal indication signal, the digital signal is put down
It is sliding to process；
Wherein, described pair desire input power amplifier digital signal carry out real-time monitoring, when monitor it is described numeral letter
When number occurring abnormal, abnormal signal indication signal is produced, including：Calculate the instantaneous power of the digital signal；To calculating
Instantaneous power be filtered to process and obtain the mean power of the digital signal；Estimate the power spectrum of the digital signal, root
Error of frequency domain is calculated with default baseline spectrum according to the power spectrum；Respectively by the instantaneous power, the mean power and institute
State error of frequency domain to be compared with pre-configured decision threshold, determine the digital signal after exception occur in time domain or frequency domain,
Produce abnormal signal indication signal.
Specifically, it is described that respectively the instantaneous power, the mean power and the error of frequency domain and pre-configured are sentenced
Certainly thresholding is compared, and determines the digital signal after exception occur in time domain or frequency domain, produces abnormal signal indication signal, bag
Include：The instantaneous power and time domain instantaneous decision threshold is compared, the digital signal is determined after exception occurs in time domain,
Produce abnormal signal indication signal；Or, when will be the mean power and time domain long, decision threshold be compared, and determines the number
Word signal produces abnormal signal indication signal after exception occurs in time domain；Or, by the error of frequency domain and frequency domain decision thresholding
Be compared, the digital signal is determined after exception occurs in frequency domain, produce abnormal signal indication signal.
Wherein, it is described the digital signal to be smoothed according to the abnormal signal indication signal, including：Root
According to the abnormal signal indication signal, weighting window sequence is produced；When the abnormal signal indication signal is low level, not to institute
State digital signal to be processed；When the abnormal signal indication signal is rising edge, the digital signal is just weighted；
It is when the abnormal signal indication signal is trailing edge, counter to the digital signal to be weighted.
Step 3, according to the abnormal signal indication signal, after the signal that is weighted after processing and delay process
Signal is exported after being selected.
Selected according to abnormal signal indication signal signal after the delay and between the signal of smoothing processing, made
For final output digit signals.
Power amplifier abnormal protection method is described, such as Fig. 5 institutes by taking the protection device of power amplifier shown in Fig. 4 as an example
Show, the method includes：
Step 501, baseband digital signal are through necessary Digital Signal Processing；
Pulse-shaping is carried out to baseband digital signal and digital upconversion process obtains digital intermediate frequency signal, to intermediate frequency digital
Signal carries out other IF process, for example equilibrium, peak clipping, predistortion and quadrature compensation etc.；
Step 502, exception monitoring is carried out to the digital signal after process, produce abnormal signal indication signal；
Step 503, signal protection module are weighted to input signal according to the different conditions of abnormal signal indication signal
Process, after final output abnormal protection, signal completes the abnormal protection of power amplifier to DAC.
Such scheme, its Digital Signal Processing adopt sequential processing mode, are not related to any feedback processing modules, so as to very
It is convenient to realize in actual hardware system.
The abnormal protection method of above-mentioned power amplifier, using power and power spectral information monitor in real time abnormal signal, when
When input signal occurs abnormal, real-time smoothing processing is carried out to abnormal input signal, should so as to improve power amplifier
Anti-burnout ability to abnormal input signal.
One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program
Related hardware is completed, and said procedure can be stored in computer-readable recording medium, such as read only memory, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
Above example only to illustrate technical scheme and unrestricted, reference only to preferred embodiment to this
It is bright to be described in detail.It will be understood by those within the art that, technical scheme can be modified
Or equivalent, without deviating from the spirit and scope of technical solution of the present invention, the claim model in the present invention all should be covered
In the middle of enclosing.
Claims (8)
1. a kind of abnormal protection device of power amplifier, including the signal generator, digital-to-analogue conversion DAC module being sequentially connected,
Modulation module and power amplifier PA, it is characterised in that the device is also included positioned at the signal generator and the DAC module
Between signal protection device and the signal monitor between the signal generator and the signal protection device, wherein：
The signal monitor, for carrying out real-time monitoring to the digital signal that the signal generator is exported, when monitoring
When stating digital signal and occurring abnormal, abnormal signal indication signal is produced, and the abnormal signal is sent to the signal protection device and refer to
Show signal；
The signal protection device, for the abnormal signal indication signal sent according to the signal monitor, to the number
Word signal is processed, and exports the result after weighting is processed to the DAC module；
The signal monitor include power computation module, Filtering Processing module, power Spectral Estimation module, error calculating module and
Judging module, wherein：
The power computation module, export after the instantaneous power of the digital signal for calculating；
The Filtering Processing module, obtains described for process is filtered to the instantaneous power that the power computation module is exported
Export after the mean power of digital signal；
The power Spectral Estimation module, for estimating to export after the power spectrum of the digital signal；
The error calculating module, the power spectrum for being exported according to the power Spectral Estimation module are calculated with default baseline spectrum
Export after going out error of frequency domain；
The judging module, for respectively by the power computation module, the Filtering Processing module and the Error Calculation mould
The output of block is compared with pre-configured decision threshold, is determined the digital signal after exception occur in time domain or frequency domain, is produced
Raw abnormal signal indication signal, and the abnormal signal indication signal is sent to the signal protection device.
2. device according to claim 1, it is characterised in that：
The judging module, determines the number specifically for the output according to the error calculating module and frequency domain decision thresholding
After word signal has error of frequency domain, abnormal signal indication signal is produced, and the abnormal signal is sent to the signal protection device and is referred to
Show signal；Or
Determine that the digital signal has time domain mistake according to the output of the power computation module and the instantaneous decision threshold of time domain
After the recovery, produces abnormal signal indication signal, and sends the abnormal signal indication signal to the signal protection device；Or
According to the output of the Filtering Processing module and time domain it is long when decision threshold determine that the digital signal has time domain
After error, abnormal signal indication signal is produced, and the abnormal signal indication signal is sent to the signal protection device.
3. device according to claim 1, it is characterised in that：
The error calculating module, specifically for calculating error of frequency domain using equation below：
Wherein, P (k), E (n) are respectively power spectrum and error of frequency domain, and k is peak frequency sequence, and α is Dynamic gene, Pmin、Pmax
Respectively power spectrum minimum and maximum thresholding, POOn the basis of compose, Emin、EmaxThe respectively minima and maximum of error of frequency domain.
4. the device according to claim 1-3 any claim, it is characterised in that：
The signal protection device includes time delay module, power window module, Leveling Block and selecting module, wherein：
The time delay module, for carrying out exporting after delay process to the digital signal that the signal generator is exported；
The power window module, the abnormal signal indication signal for being sent according to the signal monitor produce weighting window sequence；
The Leveling Block, the abnormal signal indication signal and the power window module for being sent according to the signal monitor are produced
Raw weighting window sequence, exports after being smoothed to the digital signal；
The selecting module, for the abnormal signal indication signal that sent according to the signal monitor in the time delay module
Selected between output and the output of the Leveling Block, and to the DAC module export selected resultses.
5. device according to claim 4, it is characterised in that：
The Leveling Block, specifically for：When the abnormal signal indication signal is low level, the digital signal is not entered
Row is processed, and when the abnormal signal indication signal is rising edge, the digital signal is just weighted, or, when described
It is when abnormal signal indication signal is trailing edge, counter to the digital signal to be weighted.
6. device according to claim 5, it is characterised in that：
The Leveling Block, specifically for being processed to the digital signal using equation below：
Wherein, the digital signal and the digital signal after smoothing processing before x (n), s (n) respectively smoothing processing, w (n) is power
Window, L are power window length, and Flg is abnormal signal indication signal, and n is time serieses, and Posedge is the rising edge, Negedge
For the trailing edge.
7. a kind of abnormal protection method of power amplifier, it is characterised in that the method includes：
Digital signal to being intended to input power amplifier carries out delay process；
Digital signal to being intended to input power amplifier carries out real-time monitoring, when monitoring that the digital signal occurs abnormal,
Produce abnormal signal indication signal；According to the abnormal signal indication signal, the digital signal is smoothed；
According to the abnormal signal indication signal, to being smoothed after signal and the signal after delay process select
After export；
The digital signal of described pair of desire input power amplifier carries out real-time monitoring, when monitoring that it is abnormal that the digital signal occurs
When, abnormal signal indication signal is produced, including：
Calculate the instantaneous power of the digital signal；
Instantaneous power to calculating is filtered and processes the mean power for obtaining the digital signal；
Estimate the power spectrum of the digital signal, error of frequency domain is calculated with default baseline spectrum according to the power spectrum；
Respectively the instantaneous power, the mean power and the error of frequency domain and pre-configured decision threshold are compared,
The digital signal is determined after exception occur in time domain or frequency domain, produce abnormal signal indication signal.
8. method according to claim 7, it is characterised in that：
It is described the digital signal to be smoothed according to the abnormal signal indication signal, including：
According to the abnormal signal indication signal, weighting window sequence is produced；
When the abnormal signal indication signal is low level, the digital signal is not processed；When the abnormal signal
When indication signal is rising edge, the digital signal is just weighted；When the abnormal signal indication signal is trailing edge,
It is counter to the digital signal to be weighted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110455824.4A CN103187936B (en) | 2011-12-30 | 2011-12-30 | Fault protection method and device for power amplifier |
| PCT/CN2012/072512 WO2013097360A1 (en) | 2011-12-30 | 2012-03-19 | Abnormal protection method and apparatus of a power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110455824.4A CN103187936B (en) | 2011-12-30 | 2011-12-30 | Fault protection method and device for power amplifier |
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| CN103187936A CN103187936A (en) | 2013-07-03 |
| CN103187936B true CN103187936B (en) | 2017-04-12 |
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|---|---|---|---|---|
| CN109561299B (en) * | 2018-11-27 | 2020-05-01 | 河南亿秒电子科技有限公司 | Intelligent fault analysis equipment for monitoring camera |
| CN113809993B (en) * | 2021-11-18 | 2022-03-04 | 成都市卫莱科技有限公司 | Working signal monitoring control device, system and method for power amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102055416A (en) * | 2010-12-01 | 2011-05-11 | 中兴通讯股份有限公司 | Method and system for ageing radio-frequency power amplifier |
| CN102271425A (en) * | 2011-06-22 | 2011-12-07 | 中兴通讯股份有限公司 | Method and device for protecting power amplifier |
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| JP2004211669A (en) * | 2003-01-09 | 2004-07-29 | Toshiba Corp | Servo valve controlling device and abnormality detection device of servo valve control system |
| US20080260185A1 (en) * | 2007-04-18 | 2008-10-23 | Ching Hung Tseng | Method And Apparatus For Automatically Detecting Audio Signal And Sending Control Signal |
| CN102055412B (en) * | 2010-12-02 | 2014-04-16 | 华为技术有限公司 | Power amplifier protective circuit, communication equipment and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055416A (en) * | 2010-12-01 | 2011-05-11 | 中兴通讯股份有限公司 | Method and system for ageing radio-frequency power amplifier |
| CN102271425A (en) * | 2011-06-22 | 2011-12-07 | 中兴通讯股份有限公司 | Method and device for protecting power amplifier |
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| CN103187936A (en) | 2013-07-03 |
| WO2013097360A1 (en) | 2013-07-04 |
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