WO2013097360A1 - Abnormal protection method and apparatus of a power amplifier - Google Patents
Abnormal protection method and apparatus of a power amplifier Download PDFInfo
- Publication number
- WO2013097360A1 WO2013097360A1 PCT/CN2012/072512 CN2012072512W WO2013097360A1 WO 2013097360 A1 WO2013097360 A1 WO 2013097360A1 CN 2012072512 W CN2012072512 W CN 2012072512W WO 2013097360 A1 WO2013097360 A1 WO 2013097360A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- module
- abnormality
- digital signal
- power
- Prior art date
Links
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000005856 abnormality Effects 0.000 claims abstract description 131
- 238000012545 processing Methods 0.000 claims abstract description 44
- 230000001012 protector Effects 0.000 claims abstract description 34
- 238000004364 calculation method Methods 0.000 claims description 32
- 238000009499 grossing Methods 0.000 claims description 30
- 238000001228 spectrum Methods 0.000 claims description 27
- 238000012544 monitoring process Methods 0.000 claims description 15
- 230000000630 rising effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 101000802640 Homo sapiens Lactosylceramide 4-alpha-galactosyltransferase Proteins 0.000 claims description 5
- 102100035838 Lactosylceramide 4-alpha-galactosyltransferase Human genes 0.000 claims description 5
- 230000007774 longterm Effects 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Definitions
- the present invention relates to the field of digital signal processing, and more particularly to an abnormal protection method and apparatus for a power amplifier.
- the power amplifier is widely used in various systems such as Global System for Mobile Communications (GSM), Personal Handheld Telephone System (PHS), Code Division Multiple Access (CDMA) and Wideband Code Division Multiple Access (WCDMA).
- GSM Global System for Mobile Communications
- PHS Personal Handheld Telephone System
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- the function of the power amplifier is to amplify the transmission signal of the base transceiver station, and then output the amplified radio frequency signal to the antenna feeder unit of the base station, and radiate into the air through the base station antenna to provide a reliable wireless communication signal for the mobile user terminal.
- the power amplifier In the wireless base station system, in order to improve the coverage of the device and the efficiency of the power amplifier, and reduce the heat consumption of the base station equipment, the power amplifier often works at high power, and the working environment of the actual equipment is very complicated.
- an abnormality occurs in the input of the power amplifier due to some sudden cause (such as a high-power signal or a wide-spectrum signal)
- Abnormal performance or burnout of the power amplifier will increase the equipment maintenance cost of the base station equipment provider on the one hand, and affect the normal communication of the equipment on the other hand, thereby affecting the ability of the mobile operator to provide normal services to the user.
- Embodiments of the present invention provide an abnormal protection method and apparatus for a power amplifier to solve the problem of preventing performance abnormality or burnout of the power amplifier without increasing the cost and volume of the amplifier.
- the following technical solutions are used:
- An embodiment of the present invention provides an abnormality protection device for a power amplifier, including a signal generator, a digital-to-analog conversion (DAC) module, a modulation module, and a power amplifier (PA) connected in sequence, and the device further includes a signal generator And a signal protector between the DAC module and a signal monitor between the signal generator and the signal protector, wherein:
- the signal monitor is configured to: perform real-time monitoring on the digital signal output by the signal generator, and when detecting that the digital signal is abnormal, generate a signal abnormality indicating signal, and send the signal abnormality to the signal protector Indication signal
- the signal protector is configured to: process the digital signal according to the signal abnormality indication signal sent by the signal monitor, and output a weighted processed result to the DAC module.
- the signal monitor comprises a power calculation module, a filter processing module, a power spectrum estimation module, an error calculation module and a decision module, wherein:
- the power calculation module is configured to: calculate an instantaneous power of the digital signal and output the same;
- the filter processing module is configured to: perform filtering processing on the instantaneous power output by the power calculation module to obtain an average power of the digital signal, and then output ;
- the power spectrum estimation module is configured to: estimate a power afterword output of the digital signal; the error calculation module is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum
- the output module is configured to: compare the outputs of the power calculation module, the filter processing module, and the error calculation module with a pre-configured decision threshold to determine the digital signal in the time domain or frequency After an abnormality occurs in the domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector.
- the determining module is configured to: after determining that the digital signal has a frequency domain error according to the output of the error calculation module and the frequency domain decision threshold, generate a signal abnormality indication signal, and send the signal to the signal protector Signal abnormality indication signal; or
- the error calculation module is configured to calculate the frequency domain error using the following formula:
- P(k) and E(n) are power spectrum and frequency domain error respectively
- k is the maximum frequency sequence
- a is the adjustment factor
- Pmm P max is the power spectrum minimum and maximum threshold respectively
- P is the power spectrum minimum and maximum threshold respectively
- E mm E max is the minimum and maximum of the frequency domain error, respectively.
- the signal protector comprises a delay module, a weight window module, a smoothing module and a selection module, wherein:
- the delay module is configured to: delay and process the digital signal output by the signal generator;
- the weight window module is configured to: generate a weighting window sequence according to the signal abnormality indication signal sent by the signal monitor;
- the smoothing module is configured to: after the signal abnormality indication signal sent by the signal monitor and the weighting window sequence generated by the weight window module, perform smoothing processing on the digital signal; and the selection module is configured to: The signal abnormality indication signal sent by the signal monitor selects between an output of the delay module and an output of the smoothing module, and outputs a selection result to the DAC module.
- the smoothing module is configured to perform smoothing processing on the digital signal according to a signal abnormality indication signal sent by the signal monitor and a weighting window sequence generated by the weight window module according to the following manner:
- the signal abnormality indication signal is low level, the digital signal is not processed, and when the signal abnormality indication signal is a rising edge, the digital signal is positively added.
- the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
- the smoothing module is configured to process the digital signal with the following formula:
- x(n) and s(n) are respectively the digital signal before smoothing and the smoothed digital signal
- w(n) is the weight window
- L is the weight window length
- Fig is the signal abnormality indicating signal
- Posedge is the rising edge
- Negedge is the falling edge.
- An embodiment of the present invention further provides a method for abnormal protection of a power amplifier, the method comprising: performing delay processing on a digital signal to be input to a power amplifier;
- the smoothed signal and the delayed signal are selected and output according to the signal abnormality indication signal.
- the digital signal to be input to the power amplifier is monitored in real time, and when the abnormality of the digital signal is detected, the step of generating the signal abnormality indicating signal includes:
- the instantaneous power, the average power, and the frequency domain error are respectively compared with a pre-configured decision threshold to determine that the digital signal generates a signal abnormality signal after an abnormality occurs in the time domain or the frequency domain.
- the step of smoothing the digital signal according to the signal abnormality indication signal comprises:
- the above-mentioned power amplifier abnormality protection method and device perform real-time monitoring on the digital signal of the power amplifier.
- the digital signal of the power amplifier is abnormal, the input signal is subjected to pre-digital signal processing in the digital domain, thereby preventing the power amplifier from exhibiting abnormal performance. Or burned.
- the abnormal monitoring of the power amplifier is performed in the digital domain, it can be implemented by software programming, thereby improving the achievability and protection of the power amplifier abnormal protection.
- FIG. 1 is a schematic structural diagram of an abnormality protection device of a power amplifier according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of an embodiment of a signal monitor in the device shown in FIG.
- FIG. 3 is a schematic structural view of an embodiment of a signal protector in the apparatus shown in FIG. 1;
- FIG. 4 is a schematic structural diagram of an abnormality protection device for a power amplifier according to an application example of the present invention
- FIG. 5 is a flow chart of an abnormality protection method for a power amplifier according to an embodiment of the present invention.
- the signal generator of Figure 1 is a single carrier or multi-carrier signal that is transmitted by the baseband pool and subjected to other digital signal processing (including shaping, rate conversion, etc.).
- the power amplifier (PA) power-amplifies the modulated RF signal. If there is no amplifier protection transposition in the link, when the signal generator includes a digital signal processing link that has some abnormality, such as an instantaneous high-power signal or Sudden loss of signal, etc., which may cause the performance of the power amplifier to permanently drop or burn out in an instant.
- the abnormality protection device of the power amplifier of the embodiment of the present invention includes: a signal generator 11, a signal monitor 12, a signal protector 13, a digital-to-analog conversion (DAC) module 14, a modulation module 15, and a PA 16
- the above-mentioned signal monitor 12 and signal protector 13 are two newly added modules in the embodiment of the present invention.
- the signal generator 11 is configured to: output the generated digital signal
- the signal monitor 12 is configured to: perform real-time monitoring on the digital signal output by the signal generator 11 , and generate a signal abnormality indication signal when the digital signal is detected to be abnormal, and send the signal to the signal protector 13 The signal abnormality indication signal;
- the signal protector 13 is configured to: perform weighting processing on the digital signal according to the signal abnormal indication signal sent by the signal monitor, and output a weighted processed result to the DAC module 14;
- the DAC module 14 is configured to: convert a digital signal into an analog signal
- the modulation module 15 is configured to: modulate an analog signal output by the DAC module to a radio frequency segment;
- the PA 16 is configured to: power amplify the input analog signal.
- the signal monitor 12 may further include a power calculation module 121, a filter processing module 122, a power language estimation module 123, an error calculation module 124, and a decision module 125.
- the specific structure is as shown in FIG. 2, where:
- the power calculation module 121 is configured to: calculate an instantaneous power of the digital signal as the decision information of the transient abnormality of the input signal in the current domain;
- the filter processing module 122 is configured to: filter the instantaneous power output by the power calculation module 121 as the decision information of the time domain long-term abnormality of the input signal;
- y(n) x(n) - x(n - k) + y(n - 1) ( 3 )
- x(n), y(n) are the input and output of the filter processing module, respectively;
- n is a time series;
- k is the signal delay amount;
- N is an adjustment factor.
- the power language estimation module 123 is configured to: estimate a power spectrum of the digital signal for subsequent error calculation;
- x(n) and P(k) are the input and output of the power language estimation module respectively; k is the frequency sequence; N is the FFT point number; h is the truncation sequence; M is the block length; L is the normalization factor.
- the error calculation module 124 is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum (the reference spectrum is determined by configuration information), and calculate a frequency domain error as an input signal frequency domain abnormality Decision information;
- the error calculation method used by the error calculation module includes but is not limited to the following manners:
- P(k) and E(n) are power spectrum and frequency domain error respectively
- k is the maximum frequency sequence
- ⁇ is the adjustment factor
- Pmm and P max are the power spectrum minimum and maximum threshold respectively
- E mm and E max are the minimum and maximum values of the frequency domain error, respectively.
- the decision module 125 is configured to: compare the output of the power calculation module 121, the filter processing module 122, and the error calculation module 124 with a pre-configured decision threshold, respectively, to determine After the digital signal is abnormal in the time domain or the frequency domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector 13.
- the determining module is configured to: after determining that the digital signal has a frequency domain error according to the output of the error calculating module 124 and the frequency domain determining threshold, generate a signal abnormality indicating signal, and send the signal abnormality indicating signal to the signal protector 13
- the signal abnormality indication signal is generated; or, after determining the time domain error of the digital signal according to the output of the power calculation module 121 and the time domain instantaneous decision threshold, a signal abnormality indication signal is generated, and is sent to the signal protector 13
- the signal abnormality indication signal is generated according to the output of the filter processing module 122 and the time domain long-term determination threshold, and the signal abnormality indication signal is generated, and the signal protection device is generated. 13 Send the signal anomaly indication signal.
- the signal protector 13 may further include a delay module 131, a weight window module 132, a smoothing module 133, and a selection module 134. The specific structure is shown in FIG. 3, where:
- the delay module 131 is configured to: delay processing the digital signal output by the signal generator 11, and the delay size can be configured by software according to service requirements;
- the weight window module 132 is configured to: generate a suitable weighting window sequence according to the signal abnormality indication signal, 1" column ⁇ port Blackman window, Kaiser window and Hamming window, etc., but not in the above window function;
- the smoothing module 133 is configured to: smooth the digital signal according to the signal abnormality indication signal output by the signal monitoring module;
- the smoothing processing method used by the smoothing module includes but is not limited to the following manners:
- x(n), s(n) are the digital signals before smoothing and after smoothing
- the digital signal w(n) is the weight window
- L is the weight window length
- Fig is the signal anomaly indication signal
- n is the time series
- Posedge is the rising edge
- Negedge is the falling edge.
- the smoothing module is configured to follow the signal abnormality finger output by the signal monitoring module in the following manner Signaling, smoothing the digital signal: when the signal abnormality indicating signal is low level, the digital signal is not processed, and when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted Or, when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
- the selection module 134 is set to: select between the delay module output and the smoothing module output according to the signal abnormality indication signal, and output the final abnormal protection signal.
- the signal generator 11 may include: a baseband pool module, a shaping filter and a digital up-conversion module, and an intermediate frequency algorithm processing module; wherein, the baseband pool module is configured to: generate a baseband digital signal; the shaping filter and the digital up-conversion module are configured to : Performing pulse shaping and digital up-conversion processing on the baseband digital signal to obtain an intermediate frequency digital signal; the intermediate frequency algorithm processing module is configured to: perform other intermediate frequency processing on the intermediate frequency digital signal (such as equalization, peak clipping, predistortion, and quadrature compensation, etc.); of course,
- the antenna module can be connected, and the antenna module transmits the power amplified signal to the air.
- the processing mode of other modules is the same as that of the corresponding module in Figure 1, and will not be described here.
- the abnormality protection device of the above power amplifier is not limited to only protecting the power amplifier in the communication system transmitter, and is still applicable to other systems involving the power amplification circuit.
- the abnormal protection device of the above power amplifier monitors the input signal of the power amplifier in real time in the digital domain, and performs real-time digital signal processing on the abnormal input signal, thereby improving the anti-burning capability of the power amplifier, making the device more suitable for power amplifier applications. A more complex environment.
- the embodiment of the invention further provides a method for abnormal protection of a power amplifier, the method comprising: Step 1: delay processing a digital signal to be input to the power amplifier;
- Step 2 performing real-time monitoring on the digital signal to be input to the power amplifier, and when detecting that the digital signal is abnormal, generating a signal abnormality indicating signal; and smoothing the digital signal according to the signal abnormality indicating signal;
- the step of real-time monitoring the digital signal to be input to the power amplifier, when detecting that the digital signal is abnormal, the step of generating a signal abnormality indicating signal includes: calculating an instantaneous power of the digital signal; Instantaneous power is filtered to obtain the digital signal Average power; estimating a power spectrum of the digital signal, calculating a frequency domain error according to the power spectrum and a preset reference spectrum; respectively, respectively, the instantaneous power, the average power, and the frequency domain error and the pre-configured The decision threshold is compared to determine that the digital signal generates an abnormal signal indication signal after an abnormality occurs in the time domain or the frequency domain.
- the step of smoothing the digital signal according to the signal abnormality indication signal includes: generating a weighting window sequence according to the signal abnormality indication signal; when the signal abnormality indication signal is a low level, The digital signal is not processed; when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted; when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
- Step 3 Select and output the signal after the weighting process and the signal after the delay processing according to the signal abnormality indication signal.
- a signal is selected between the delayed signal and the smoothed signal according to the signal abnormality indicating signal as the final output digital signal.
- the power amplifier abnormality protection method is described by taking the protection device of the power amplifier shown in FIG. 4 as an example. As shown in FIG. 5, the method includes:
- Step 501 The baseband digital signal undergoes necessary digital signal processing
- Step 502 processing the processed digital signal Performing abnormality monitoring to generate a signal abnormality indicating signal
- Step 503 The signal protection module weights the input signal according to different states of the signal abnormality indicating signal, and finally outputs the abnormally protected signal to the DAC to complete the abnormality of the power amplifier. Protection.
- the digital signal processing uses sequential processing, and does not involve any feedback processing module, so that it is convenient to implement in an actual hardware system.
- the abnormal protection method of the power amplifier described above uses the power and power language information to monitor the abnormal signal in real time, and when the input signal is abnormal, the abnormal input signal is smoothed in real time, thereby improving the anti-burning of the power amplifier against the abnormal input signal. ability.
- the above-mentioned power amplifier abnormality protection method and device perform real-time monitoring on the digital signal of the power amplifier.
- the digital signal of the power amplifier is abnormal
- the input signal is subjected to pre-digital signal processing in the digital domain, thereby preventing the power amplifier from exhibiting abnormal performance. Or burned.
- the abnormal monitoring of the power amplifier is performed in the digital domain, it can be implemented by software programming, thereby improving the achievability and protection of the power amplifier abnormal protection. Therefore, the present invention has strong industrial applicability.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
An abnormal protection method and an apparatus of a power amplifier, the abnormal protection apparatus of the power amplifier comprising successively connected a signal generator, a DAC module, a modulation module and a PA, also comprising a signal protector located between the signal generator and the DAC module, and a signal monitor located between the signal generator and the signal protector, wherein the signal monitor is configured to real-time monitor the digital signal output from the signal generator, generate an abnormality indication signal of the signal when the abnormality of the digital signal is monitored, and send the abnormality indication signal of the signal to the signal protector; the signal protector is configured to process the digital signal according to the abnormality indication signal of the signal sent from the signal monitor, and output the result of the weighting processing to the DAC module. The abnormal protection method and the apparatus of the power amplifier can effectively prevent the power amplifier from the performance abnormality or burning out.
Description
功率放大器的异常保护方法和装置 Power amplifier abnormal protection method and device
技术领域 Technical field
本发明涉及数字信号处理领域， 尤其涉及一种功率放大器的异常保护方 法和装置。 The present invention relates to the field of digital signal processing, and more particularly to an abnormal protection method and apparatus for a power amplifier.
背景技术 Background technique
功率放大器作为发射机的重要组成部分， 广泛应用于全球移动通讯*** ( GSM )、 个人手持式电话***（PHS )、 码分多址（CDMA )和宽带码分 多址（WCDMA )等各种制式的现代无线通信***中， 无论^ ^站还是直放 站， 功率放大器都是不可或缺且极其重要的。 功率放大器的作用是将基站收 发信机的发射信号进行功率放大， 然后把放大的射频信号输出到基站的天馈 单元，通过基站天线辐射到空中，为移动用户终端提供可靠的无线通信信号。 As an important part of the transmitter, the power amplifier is widely used in various systems such as Global System for Mobile Communications (GSM), Personal Handheld Telephone System (PHS), Code Division Multiple Access (CDMA) and Wideband Code Division Multiple Access (WCDMA). In modern wireless communication systems, power amplifiers are indispensable and extremely important, regardless of station or repeater. The function of the power amplifier is to amplify the transmission signal of the base transceiver station, and then output the amplified radio frequency signal to the antenna feeder unit of the base station, and radiate into the air through the base station antenna to provide a reliable wireless communication signal for the mobile user terminal.
在无线基站***中， 为了提高设备的覆盖范围和功率放大器的效率， 减 少基站设备的热耗， 功率放大器往往工作在高功率下， 且实际设备的工作环 境非常复杂。 当由于某种突发原因， 功率放大器的输入出现异常时（例如大 功率信号或宽谱信号） ， 很容易导致功率放大器出现性能永久下降， 甚至导 致烧毁。 功率放大器的性能异常或烧毁， 一方面会增加基站设备提供商的设 备维修成本， 另一方面会影响设备的正常通信， 从而影响移动运营商给用户 提供正常业务的能力。 因此， 有必要釆用一种技术来提高功率放大器对异常 信号的应对能力。 传统上， 经常在功率放大器内部或外部增加一些电流 /电压 检测电路来提高功率放大器的防烧毁能力， 但是， 这不仅会增加发射机 /功率 放大器的成本和体积， 而且在模拟域进行信号处理往往比较复杂。 In the wireless base station system, in order to improve the coverage of the device and the efficiency of the power amplifier, and reduce the heat consumption of the base station equipment, the power amplifier often works at high power, and the working environment of the actual equipment is very complicated. When an abnormality occurs in the input of the power amplifier due to some sudden cause (such as a high-power signal or a wide-spectrum signal), it is easy to cause a permanent drop in performance of the power amplifier, or even cause burnout. Abnormal performance or burnout of the power amplifier will increase the equipment maintenance cost of the base station equipment provider on the one hand, and affect the normal communication of the equipment on the other hand, thereby affecting the ability of the mobile operator to provide normal services to the user. Therefore, it is necessary to use a technique to improve the power amplifier's ability to respond to abnormal signals. Traditionally, some current/voltage detection circuits have been added inside or outside the power amplifier to improve the anti-burnout capability of the power amplifier. However, this not only increases the cost and volume of the transmitter/power amplifier, but also often performs signal processing in the analog domain. quite complicated.
发明内容 本发明实施例提供了一种功率放大器的异常保护方法和装置， 以解决在 不增加放大器的成本和体积的情况下， 防止功率放大器出现性能异常或烧毁 的问题。
为解决上述技术问题， 釆用如下技术方案： SUMMARY OF THE INVENTION Embodiments of the present invention provide an abnormal protection method and apparatus for a power amplifier to solve the problem of preventing performance abnormality or burnout of the power amplifier without increasing the cost and volume of the amplifier. In order to solve the above technical problems, the following technical solutions are used:
本发明实施例提供了一种功率放大器的异常保护装置， 包括依次连接的 信号产生器、 数模转换（DAC )模块、 调制模块和功率放大器（PA ) , 该装 置还包括位于所述信号产生器和所述 DAC模块之间的信号保护器和位于所 述信号产生器和所述信号保护器之间的信号监控器， 其中： An embodiment of the present invention provides an abnormality protection device for a power amplifier, including a signal generator, a digital-to-analog conversion (DAC) module, a modulation module, and a power amplifier (PA) connected in sequence, and the device further includes a signal generator And a signal protector between the DAC module and a signal monitor between the signal generator and the signal protector, wherein:
所述信号监控器设置成： 对所述信号产生器输出的数字信号进行实时监 测， 当监测到所述数字信号出现异常时， 产生信号异常指示信号， 并向所述 信号保护器发送该信号异常指示信号； The signal monitor is configured to: perform real-time monitoring on the digital signal output by the signal generator, and when detecting that the digital signal is abnormal, generate a signal abnormality indicating signal, and send the signal abnormality to the signal protector Indication signal
所述信号保护器设置成： 根据所述信号监控器发送的所述信号异常指示 信号， 对所述数字信号进行处理， 并向所述 DAC模块输出加权处理后的结 果。 The signal protector is configured to: process the digital signal according to the signal abnormality indication signal sent by the signal monitor, and output a weighted processed result to the DAC module.
优选地， 所述信号监控器包括功率计算模块、 滤波处理模块、 功率谱估 计模块、 误差计算模块和判决模块， 其中： Preferably, the signal monitor comprises a power calculation module, a filter processing module, a power spectrum estimation module, an error calculation module and a decision module, wherein:
所述功率计算模块设置成： 计算所述数字信号的瞬时功率后输出； 所述滤波处理模块设置成： 对所述功率计算模块输出的瞬时功率进行滤 波处理得到所述数字信号的平均功率后输出； The power calculation module is configured to: calculate an instantaneous power of the digital signal and output the same; the filter processing module is configured to: perform filtering processing on the instantaneous power output by the power calculation module to obtain an average power of the digital signal, and then output ;
所述功率谱估计模块设置成： 估计所述数字信号的功率语后输出； 所述误差计算模块设置成： 根据所述功率语估计模块输出的功率谱与预 设的基准谱计算出频域误差后输出； 所述判决模块设置成： 分别将所述功率计算模块、 所述滤波处理模块和 所述误差计算模块的输出与预配置的判决门限进行比较， 确定所述数字信号 在时域或频域出现异常后， 产生信号异常指示信号， 并向所述信号保护器发 送该信号异常指示信号。 The power spectrum estimation module is configured to: estimate a power afterword output of the digital signal; the error calculation module is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum The output module is configured to: compare the outputs of the power calculation module, the filter processing module, and the error calculation module with a pre-configured decision threshold to determine the digital signal in the time domain or frequency After an abnormality occurs in the domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector.
优选地， 所述判决模块设置成： 根据所述误差计算模块的输出和频域判 决门限确定出所述数字信号存在频域误差后， 产生信号异常指示信号， 并向 所述信号保护器发送该信号异常指示信号； 或者 Preferably, the determining module is configured to: after determining that the digital signal has a frequency domain error according to the output of the error calculation module and the frequency domain decision threshold, generate a signal abnormality indication signal, and send the signal to the signal protector Signal abnormality indication signal; or
根据所述功率计算模块的输出和时域瞬时判决门限确定出所述数字信号 存在时域误差后， 产生信号异常指示信号， 并向所述信号保护器发送该信号
异常指示信号； 或者 Determining, according to an output of the power calculation module and a time domain instantaneous decision threshold, that a time domain error exists in the digital signal, generating a signal abnormality indication signal, and transmitting the signal to the signal protector Abnormal indication signal; or
根据所述滤波处理模块的输出的和时域长时判决门限确定出所述数字信 号存在时域误差后， 产生信号异常指示信号， 并向所述信号保护器发送该信 号异常指示信号。 And after determining that the digital signal has a time domain error according to the output of the filter processing module and the time domain long-term decision threshold, generating a signal abnormality indication signal, and transmitting the signal abnormality indication signal to the signal protector.
优选地， 所述误差计算模块设置成釆用如下公式计算频域误差： Preferably, the error calculation module is configured to calculate the frequency domain error using the following formula:
E E((nn)) == iE E((nn)) == i
E if V, |l|PpP(((kkk)))|l| > pr E if V, |l|P p P(((k k k)))|l| > p r
ke[o,K] Ke[o,K]
其中， P(k)、 E(n)分别为功率谱和频域误差， k为最大频率序列， a为调 整因子， Pmm Pmax分别为功率谱最小和最大门限， P。为基准语， Emm Emax 分别为频域误差的最小值和最大值。 Among them, P(k) and E(n) are power spectrum and frequency domain error respectively, k is the maximum frequency sequence, a is the adjustment factor, and Pmm P max is the power spectrum minimum and maximum threshold respectively, P. For the benchmark, E mm E max is the minimum and maximum of the frequency domain error, respectively.
优选地， 所述信号保护器包括延时模块、 权窗模块、 平滑模块和选择模 块， 其中： Preferably, the signal protector comprises a delay module, a weight window module, a smoothing module and a selection module, wherein:
所述延时模块设置成： 对所述信号产生器输出的所述数字信号进行延时 处理后输出； The delay module is configured to: delay and process the digital signal output by the signal generator;
所述权窗模块设置成： 根据所述信号监控器发送的信号异常指示信号产 生加权窗序列； The weight window module is configured to: generate a weighting window sequence according to the signal abnormality indication signal sent by the signal monitor;
所述平滑模块设置成： 根据所述信号监控器发送的信号异常指示信号和 所述权窗模块产生的加权窗序列， 对所述数字信号进行平滑处理后输出； 所述选择模块设置成： 根据所述信号监控器发送的信号异常指示信号在 所述延时模块的输出和所述平滑模块的输出之间进行选择， 并向所述 DAC 模块输出选择结果。 The smoothing module is configured to: after the signal abnormality indication signal sent by the signal monitor and the weighting window sequence generated by the weight window module, perform smoothing processing on the digital signal; and the selection module is configured to: The signal abnormality indication signal sent by the signal monitor selects between an output of the delay module and an output of the smoothing module, and outputs a selection result to the DAC module.
优选地， 所述平滑模块设置成按照以下方式根据所述信号监控器发送的 信号异常指示信号和所述权窗模块产生的加权窗序列 , 对所述数字信号进行 平滑处理后输出： 当所述信号异常指示信号为低电平时， 不对所述数字信号 进行处理， 当所述信号异常指示信号为上升沿时， 对所述数字信号进行正加
权， 或者， 当所述信号异常指示信号为下降沿时， 对所述数字信号进行反加 权。 Preferably, the smoothing module is configured to perform smoothing processing on the digital signal according to a signal abnormality indication signal sent by the signal monitor and a weighting window sequence generated by the weight window module according to the following manner: When the signal abnormality indication signal is low level, the digital signal is not processed, and when the signal abnormality indication signal is a rising edge, the digital signal is positively added. Or, when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
优选地， 所述平滑模块设置成釆用如下公式对所述数字信号进行处理： Preferably, the smoothing module is configured to process the digital signal with the following formula:
!x(n) * w(n) n < L if Fig @ Posedge !x(n) * w(n) n < L if Fig @ Posedge
0 if Fig == 1 0 if Fig == 1
x(n) * w(L― n) n < L if Fig @ Negedge x(n) * w(L- n) n < L if Fig @ Negedge
其中， x(n)、 s(n)分别为平滑处理前的数字信号和平滑处理后的数字信 号， w(n)为权窗， L为权窗长度， Fig为信号异常指示信号， n为时间序列， Posedge 为所述上升沿， Negedge为所述下降沿。 Where x(n) and s(n) are respectively the digital signal before smoothing and the smoothed digital signal, w(n) is the weight window, L is the weight window length, and Fig is the signal abnormality indicating signal, where n is The time series, Posedge is the rising edge, and Negedge is the falling edge.
本发明实施例还提供了一种功率放大器的异常保护方法， 该方法包括： 对欲输入功率放大器的数字信号进行延时处理； An embodiment of the present invention further provides a method for abnormal protection of a power amplifier, the method comprising: performing delay processing on a digital signal to be input to a power amplifier;
对欲输入功率放大器的数字信号进行实时监测， 当监测到所述数字信号 出现异常时， 产生信号异常指示信号； 根据所述信号异常指示信号， 对所述 数字信号进行平滑处理； Performing real-time monitoring on the digital signal to be input to the power amplifier, and when detecting that the digital signal is abnormal, generating a signal abnormality indicating signal; and smoothing the digital signal according to the signal abnormality indicating signal;
根据所述信号异常指示信号， 对进行平滑处理后的信号和延时处理后的 信号进行选择后输出。 The smoothed signal and the delayed signal are selected and output according to the signal abnormality indication signal.
优选地， 对欲输入功率放大器的数字信号进行实时监测， 当监测到所述 数字信号出现异常时， 产生信号异常指示信号的步骤包括： Preferably, the digital signal to be input to the power amplifier is monitored in real time, and when the abnormality of the digital signal is detected, the step of generating the signal abnormality indicating signal includes:
计算出所述数字信号的瞬时功率； Calculating the instantaneous power of the digital signal;
对计算出的瞬时功率进行滤波处理得到所述数字信号的平均功率； 估计所述数字信号的功率谱， 根据所述功率谱与预设的基准谱计算出频 域误差； Performing a filtering process on the calculated instantaneous power to obtain an average power of the digital signal; estimating a power spectrum of the digital signal, and calculating a frequency domain error according to the power spectrum and a preset reference spectrum;
分别将所述瞬时功率、 所述平均功率和所述频域误差与预配置的判决门 限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生信号异常指 示信号。 The instantaneous power, the average power, and the frequency domain error are respectively compared with a pre-configured decision threshold to determine that the digital signal generates a signal abnormality signal after an abnormality occurs in the time domain or the frequency domain.
优选地， 根据所述信号异常指示信号， 对所述数字信号进行平滑处理的 步骤包括： Preferably, the step of smoothing the digital signal according to the signal abnormality indication signal comprises:
根据所述信号异常指示信号， 产生加权窗序列；
当所述信号异常指示信号为低电平时， 不对所述数字信号进行处理； 当 所述信号异常指示信号为上升沿时， 对所述数字信号进行正加权； 当所述信 号异常指示信号为下降沿时， 对所述数字信号进行反加权。 Generating a weighting window sequence according to the signal abnormality indication signal; When the signal abnormality indicating signal is low level, the digital signal is not processed; when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted; when the signal abnormality indicating signal is falling The digital signal is inversely weighted along the time.
上述功率放大器的异常保护方法和装置， 对功率放大器的数字信号进行 实时监测， 当功率放大器的数字信号出现异常时， 在数字域对输入信号进行 预先的数字信号处理， 从而防止功率放大器出现性能异常或烧毁。 且由于功 率放大器的异常监控全部在数字域进行， 可以通过软件编程实现， 从而提高 功率放大器异常保护的可实现性和保护能力。 附图概述 The above-mentioned power amplifier abnormality protection method and device perform real-time monitoring on the digital signal of the power amplifier. When the digital signal of the power amplifier is abnormal, the input signal is subjected to pre-digital signal processing in the digital domain, thereby preventing the power amplifier from exhibiting abnormal performance. Or burned. And since the abnormal monitoring of the power amplifier is performed in the digital domain, it can be implemented by software programming, thereby improving the achievability and protection of the power amplifier abnormal protection. BRIEF abstract
图 1是本发明实施例的功率放大器的异常保护装置结构示意图； 图 2是图 1所示装置中的信号监控器实施例的结构示意图； 1 is a schematic structural diagram of an abnormality protection device of a power amplifier according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of an embodiment of a signal monitor in the device shown in FIG.
图 3是图 1所示装置中的信号保护器实施例的结构示意图； 3 is a schematic structural view of an embodiment of a signal protector in the apparatus shown in FIG. 1;
图 4是本发明应用示例的功率放大器的异常保护装置结构示意图； 图 5是本发明实施例的功率放大器的异常保护方法流程图。 本发明的较佳实施方式 4 is a schematic structural diagram of an abnormality protection device for a power amplifier according to an application example of the present invention; and FIG. 5 is a flow chart of an abnormality protection method for a power amplifier according to an embodiment of the present invention. Preferred embodiment of the invention
为使本发明的目的、 技术方案和优点更加清楚明白， 下文中将结合附图 对本发明的实施例进行详细说明。 需要说明的是， 在不冲突的情况下， 本申 请中的实施例及实施例中的特征可以相互任意组合。 In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.
图 1是本发明实施例一的功率放大器的异常保护装置结构示意图， 亦是 该装置在通信***中的位置示意图。 对于通信***发射机来说， 图 1中的信 号产生器为基带池传送过来并经过其他数字信号处理（包括成型、 速率变换 等）的单载波或多载波信号。 功率放大器（PA )对调制后的射频信号进行功 率放大， 如果链路中不存在功放保护转置， 当信号产生器包含的数字信号处 理链路发生某种异常时， 例如出现瞬时大功率信号或信号突然丟失等， 这可 能会导致功率放大器的性能永久下降或瞬间烧毁。
由图 1可以看出， 本发明实施例的功率放大器的异常保护装置包括： 信 号产生器 11、 信号监控器 12、 信号保护器 13、 数模转换（DAC )模块 14、 调制模块 15和 PA 16;其中上述信号监控器 12和信号保护器 13是本发明实 施例中新增加的两个模块。 1 is a schematic structural view of an abnormality protection device for a power amplifier according to Embodiment 1 of the present invention, and is also a schematic diagram of a position of the device in a communication system. For communication system transmitters, the signal generator of Figure 1 is a single carrier or multi-carrier signal that is transmitted by the baseband pool and subjected to other digital signal processing (including shaping, rate conversion, etc.). The power amplifier (PA) power-amplifies the modulated RF signal. If there is no amplifier protection transposition in the link, when the signal generator includes a digital signal processing link that has some abnormality, such as an instantaneous high-power signal or Sudden loss of signal, etc., which may cause the performance of the power amplifier to permanently drop or burn out in an instant. As can be seen from FIG. 1, the abnormality protection device of the power amplifier of the embodiment of the present invention includes: a signal generator 11, a signal monitor 12, a signal protector 13, a digital-to-analog conversion (DAC) module 14, a modulation module 15, and a PA 16 The above-mentioned signal monitor 12 and signal protector 13 are two newly added modules in the embodiment of the present invention.
所述信号产生器 11设置成： 输出产生的数字信号； The signal generator 11 is configured to: output the generated digital signal;
所述信号监控器 12设置成： 对所述信号产生器 11输出的数字信号进行 实时监测， 当监测到所述数字信号出现异常时， 产生信号异常指示信号， 并 向所述信号保护器 13发送该信号异常指示信号； The signal monitor 12 is configured to: perform real-time monitoring on the digital signal output by the signal generator 11 , and generate a signal abnormality indication signal when the digital signal is detected to be abnormal, and send the signal to the signal protector 13 The signal abnormality indication signal;
所述信号保护器 13设置成:根据所述信号监控器发送的所述信号异常指 示信号， 对所述数字信号进行加权处理， 并向所述 DAC模块 14输出加权处 理后的结果； The signal protector 13 is configured to: perform weighting processing on the digital signal according to the signal abnormal indication signal sent by the signal monitor, and output a weighted processed result to the DAC module 14;
所述 DAC模块 14设置成： 把数字信号转换成模拟信号； The DAC module 14 is configured to: convert a digital signal into an analog signal;
所述调制模块 15设置成： 将所述 DAC模块输出的模拟信号调制到射频 段； The modulation module 15 is configured to: modulate an analog signal output by the DAC module to a radio frequency segment;
所述 PA16设置成： 对输入的模拟信号进行功率放大。 The PA 16 is configured to: power amplify the input analog signal.
另外， 上述信号监控器 12又可以包括功率计算模块 121、 滤波处理模块 122、 功率语估计模块 123、 误差计算模块 124和判决模块 125, 具体结构如 图 2所示， 其中： In addition, the signal monitor 12 may further include a power calculation module 121, a filter processing module 122, a power language estimation module 123, an error calculation module 124, and a decision module 125. The specific structure is as shown in FIG. 2, where:
功率计算模块 121设置成： 计算数字信号的瞬时功率， 作为输入信号出 现时域瞬时异常的判决信息； The power calculation module 121 is configured to: calculate an instantaneous power of the digital signal as the decision information of the transient abnormality of the input signal in the current domain;
滤波处理模块 122设置成： 对功率计算模块 121输出的瞬时功率进行滤 波处理， 作为输入信号出现时域长时异常的判决信息； The filter processing module 122 is configured to: filter the instantaneous power output by the power calculation module 121 as the decision information of the time domain long-term abnormality of the input signal;
y(n) = (1— 2- N) * y(n— 1) + 2- N * x(n) ( 1 ) y(n) = (1— 2- N ) * y(n-1) + 2- N * x(n) ( 1 )
y(n) = [x(n) - x(n - k)] + y(n - l) ( 2 ) y(n) = [x(n) - x(n - k)] + y(n - l) ( 2 )
y(n) = x(n) - x(n - k) + y(n - 1) ( 3 )
其中， x(n)、 y(n)分别为滤波处理模块的输入和输出； n为时间序列； k为 信号延迟量； N为调节因子。 y(n) = x(n) - x(n - k) + y(n - 1) ( 3 ) Where x(n), y(n) are the input and output of the filter processing module, respectively; n is a time series; k is the signal delay amount; N is an adjustment factor.
功率语估计模块 123设置成： 估计数字信号的功率谱， 用于后续的误差 计算；
The power language estimation module 123 is configured to: estimate a power spectrum of the digital signal for subsequent error calculation;
P(k) = i \∑^0 x(n)h(n)exp (― j ^ nk)P(k) = i \∑^ 0 x(n)h(n)exp (― j ^ nk)
误差计算模块 124设置成： 根据所述功率语估计模块输出的功率谱与预 设的基准谱（基准谱由配置信息决定）计算出频域误差， 计算频域误差， 作 为输入信号频域异常的判决信息； The error calculation module 124 is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum (the reference spectrum is determined by configuration information), and calculate a frequency domain error as an input signal frequency domain abnormality Decision information;
该误差计算模块釆用的误差计算方式包括但不限于下述方式： The error calculation method used by the error calculation module includes but is not limited to the following manners:
判决模块 125设置成： 分别将所述功率计算模块 121、 所述滤波处理模 块 122和所述误差计算模块 124的输出与预配置的判决门限进行比较， 确定
所述数字信号在时域或频域出现异常后， 产生信号异常指示信号， 并向所述 信号保护器 13发送该信号异常指示信号。 其中， 所述判决模块设置成： 根据所述误差计算模块 124的输出和频域 判决门限确定出所述数字信号存在频域误差后， 产生信号异常指示信号， 并 向所述信号保护器 13发送该信号异常指示信号； 或者，根据所述功率计算模 块 121的输出和时域瞬时判决门限确定出所述数字信号存在时域误差后， 产 生信号异常指示信号，并向所述信号保护器 13发送该信号异常指示信号； 或 者， 根据所述滤波处理模块 122的输出的和时域长时判决门限确定出所述数 字信号存在时域误差后， 产生信号异常指示信号， 并向所述信号保护器 13 发送该信号异常指示信号。 另外， 信号保护器 13又可以包括延时模块 131、 权窗模块 132、 平滑模 块 133和选择模块 134 , 具体结构如图 3所示， 其中： The decision module 125 is configured to: compare the output of the power calculation module 121, the filter processing module 122, and the error calculation module 124 with a pre-configured decision threshold, respectively, to determine After the digital signal is abnormal in the time domain or the frequency domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector 13. The determining module is configured to: after determining that the digital signal has a frequency domain error according to the output of the error calculating module 124 and the frequency domain determining threshold, generate a signal abnormality indicating signal, and send the signal abnormality indicating signal to the signal protector 13 The signal abnormality indication signal is generated; or, after determining the time domain error of the digital signal according to the output of the power calculation module 121 and the time domain instantaneous decision threshold, a signal abnormality indication signal is generated, and is sent to the signal protector 13 And the signal abnormality indication signal is generated according to the output of the filter processing module 122 and the time domain long-term determination threshold, and the signal abnormality indication signal is generated, and the signal protection device is generated. 13 Send the signal anomaly indication signal. In addition, the signal protector 13 may further include a delay module 131, a weight window module 132, a smoothing module 133, and a selection module 134. The specific structure is shown in FIG. 3, where:
延时模块 131设置成： 对信号产生器 11输出的数字信号进行延时处理， 延时大小可以根据业务需求由软件配置； The delay module 131 is configured to: delay processing the digital signal output by the signal generator 11, and the delay size can be configured by software according to service requirements;
权窗模块 132设置成： 根据信号异常指示信号产生合适的加权窗序列， 1"列 ^口 Blackman窗、 Kaiser窗和 Hamming窗等, 但不艮于上述窗函数； The weight window module 132 is configured to: generate a suitable weighting window sequence according to the signal abnormality indication signal, 1" column ^ port Blackman window, Kaiser window and Hamming window, etc., but not in the above window function;
平滑模块 133设置成： 根据信号监控模块输出的信号异常指示信号， 对 数字信号进行平滑处理； The smoothing module 133 is configured to: smooth the digital signal according to the signal abnormality indication signal output by the signal monitoring module;
该平滑模块釆用的平滑处理方式包括但不限于下述方式： The smoothing processing method used by the smoothing module includes but is not limited to the following manners:
!x(n) * w(n) n < L if Fig @ Posedge !x(n) * w(n) n < L if Fig @ Posedge
0 if Fig == 1 ( 8 ) x(n) * w(L― n) n < L if Fig @ Negedge 其中， x(n)、 s(n)分别为平滑处理前的数字信号和平滑处理后的数字信 号， w(n)为权窗， L为权窗长度， Fig为信号异常指示信号， n为时间序列， Posedge 为所述上升沿， Negedge为所述下降沿。 0 if Fig == 1 ( 8 ) x(n) * w(L― n) n < L if Fig @ Negedge where x(n), s(n) are the digital signals before smoothing and after smoothing The digital signal, w(n) is the weight window, L is the weight window length, Fig is the signal anomaly indication signal, n is the time series, Posedge is the rising edge, and Negedge is the falling edge.
需要说明的是，上述公式（7 )和公式（8 )为本发明实施例釆用的公式。 所述平滑模块设置成按照以下方式根据信号监控模块输出的信号异常指
示信号， 对数字信号进行平滑处理： 当所述信号异常指示信号为低电平时， 不对所述数字信号进行处理， 当所述信号异常指示信号为上升沿时， 对所述 数字信号进行正加权， 或者， 当所述信号异常指示信号为下降沿时， 对所述 数字信号进行反加权。 It should be noted that the above formula (7) and formula (8) are formulas used in the embodiment of the present invention. The smoothing module is configured to follow the signal abnormality finger output by the signal monitoring module in the following manner Signaling, smoothing the digital signal: when the signal abnormality indicating signal is low level, the digital signal is not processed, and when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted Or, when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
选择模块 134设置成： 根据信号异常指示信号在延时模块输出和平滑模 块输出之间进行选择， 输出最终的异常保护后信号。 The selection module 134 is set to: select between the delay module output and the smoothing module output according to the signal abnormality indication signal, and output the final abnormal protection signal.
优选地， 上述信号产生器 11可以包括： 基带池模块、 成型滤波和数字上 变频模块和中频算法处理模块； 其中， 基带池模块设置成： 产生基带数字信 号； 成型滤波和数字上变频模块设置成： 对基带数字信号进行脉冲成型和数 字上变频处理得到中频数字信号； 中频算法处理模块设置成： 对中频数字信 号进行其他的中频处理（例如均衡、 削峰、 预失真和正交补偿等） ； 当然，Preferably, the signal generator 11 may include: a baseband pool module, a shaping filter and a digital up-conversion module, and an intermediate frequency algorithm processing module; wherein, the baseband pool module is configured to: generate a baseband digital signal; the shaping filter and the digital up-conversion module are configured to : Performing pulse shaping and digital up-conversion processing on the baseband digital signal to obtain an intermediate frequency digital signal; the intermediate frequency algorithm processing module is configured to: perform other intermediate frequency processing on the intermediate frequency digital signal (such as equalization, peak clipping, predistortion, and quadrature compensation, etc.); of course,
PA后可接天馈模块， 该天馈模块把功率放大后的信号发射到空中。 其他模 块的处理方式与图 1中对应模块的处理方式一致， 此处不再赘述。 After the PA, the antenna module can be connected, and the antenna module transmits the power amplified signal to the air. The processing mode of other modules is the same as that of the corresponding module in Figure 1, and will not be described here.
上述功率放大器的异常保护装置不限于只对通信***发射机中的功率放 大器进行保护， 对于其他涉及到功率放大电路的***仍然适用。 The abnormality protection device of the above power amplifier is not limited to only protecting the power amplifier in the communication system transmitter, and is still applicable to other systems involving the power amplification circuit.
上述功率放大器的异常保护装置， 在数字域对功率放大器的输入信号进 行实时监测， 并对异常输入信号进行实时的数字信号处理， 提高了功率放大 器的防烧毁能力， 使得该装置更适合功率放大器应用环境更为复杂的场合。 The abnormal protection device of the above power amplifier monitors the input signal of the power amplifier in real time in the digital domain, and performs real-time digital signal processing on the abnormal input signal, thereby improving the anti-burning capability of the power amplifier, making the device more suitable for power amplifier applications. A more complex environment.
本发明实施例还提供了一种功率放大器的异常保护方法， 该方法包括： 步骤一、 对欲输入功率放大器的数字信号进行延时处理； The embodiment of the invention further provides a method for abnormal protection of a power amplifier, the method comprising: Step 1: delay processing a digital signal to be input to the power amplifier;
步骤二、 对欲输入功率放大器的数字信号进行实时监测， 当监测到所述 数字信号出现异常时，产生信号异常指示信号;根据所述信号异常指示信号， 对所述数字信号进行平滑处理； Step 2: performing real-time monitoring on the digital signal to be input to the power amplifier, and when detecting that the digital signal is abnormal, generating a signal abnormality indicating signal; and smoothing the digital signal according to the signal abnormality indicating signal;
其中， 所述对欲输入功率放大器的数字信号进行实时监测， 当监测到所 述数字信号出现异常时， 产生信号异常指示信号的步骤包括： 计算出所述数 字信号的瞬时功率； 对计算出的瞬时功率进行滤波处理得到所述数字信号的
平均功率； 估计所述数字信号的功率谱， 根据所述功率谱与预设的基准谱计 算出频域误差； 分别将所述瞬时功率、 所述平均功率和所述频域误差与预配 置的判决门限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生 信号异常指示信号。 其中， 所述分别将所述瞬时功率、 所述平均功率和所述频域误差与预配 置的判决门限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生 信号异常指示信号的步骤包括： 将所述瞬时功率与时域瞬时判决门限进行比 较， 确定所述数字信号在时域出现异常后， 产生信号异常指示信号； 或者， 将所述平均功率与时域长时判决门限进行比较， 确定所述数字信号在时域出 现异常后， 产生信号异常指示信号； 或者， 将所述频域误差与频域判决门限 进行比较， 确定所述数字信号在频域出现异常后， 产生信号异常指示信号。 The step of real-time monitoring the digital signal to be input to the power amplifier, when detecting that the digital signal is abnormal, the step of generating a signal abnormality indicating signal includes: calculating an instantaneous power of the digital signal; Instantaneous power is filtered to obtain the digital signal Average power; estimating a power spectrum of the digital signal, calculating a frequency domain error according to the power spectrum and a preset reference spectrum; respectively, respectively, the instantaneous power, the average power, and the frequency domain error and the pre-configured The decision threshold is compared to determine that the digital signal generates an abnormal signal indication signal after an abnormality occurs in the time domain or the frequency domain. The comparing the instantaneous power, the average power, and the frequency domain error with a pre-configured decision threshold, respectively, to determine that the digital signal generates an abnormal signal indication signal after an abnormality occurs in the time domain or the frequency domain. The step of: comparing the instantaneous power with a time domain instantaneous decision threshold, determining that the digital signal generates a signal abnormality indication signal after an abnormality occurs in the time domain; or, determining the average power and the time domain long time threshold Comparing, determining that the digital signal generates a signal abnormality indication signal after an abnormality occurs in the time domain; or comparing the frequency domain error with a frequency domain decision threshold to determine that the digital signal is abnormal after being in the frequency domain, Signal abnormality indication signal.
其中，所述根据所述信号异常指示信号，对所述数字信号进行平滑处理， 的步骤包括： 根据所述信号异常指示信号， 产生加权窗序列； 当所述信号异 常指示信号为低电平时， 不对所述数字信号进行处理； 当所述信号异常指示 信号为上升沿时， 对所述数字信号进行正加权； 当所述信号异常指示信号为 下降沿时， 对所述数字信号进行反加权。 The step of smoothing the digital signal according to the signal abnormality indication signal includes: generating a weighting window sequence according to the signal abnormality indication signal; when the signal abnormality indication signal is a low level, The digital signal is not processed; when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted; when the signal abnormality indicating signal is a falling edge, the digital signal is inversely weighted.
步骤三、 根据所述信号异常指示信号， 对进行加权处理后的信号和延时 处理后的信号进行选择后输出。 根据信号异常指示信号在延时后的信号和经过平滑处理的信号之间进行 选择， 作为最终的输出数字信号。 Step 3: Select and output the signal after the weighting process and the signal after the delay processing according to the signal abnormality indication signal. A signal is selected between the delayed signal and the smoothed signal according to the signal abnormality indicating signal as the final output digital signal.
以图 4所示功率放大器的保护装置为例描述功率放大器异常保护方法， 如图 5所示， 该方法包括： The power amplifier abnormality protection method is described by taking the protection device of the power amplifier shown in FIG. 4 as an example. As shown in FIG. 5, the method includes:
步骤 501、 基带数字信号经过必要的数字信号处理； Step 501: The baseband digital signal undergoes necessary digital signal processing;
对基带数字信号进行脉冲成型和数字上变频处理得到中频数字信号， 对 中频数字信号进行其他的中频处理，例如均衡、削峰、预失真和正交补偿等； 步骤 502、对处理后的数字信号进行异常监测，产生信号异常指示信号； 步骤 503、 信号保护模块根据信号异常指示信号的不同状态， 对输入信 号进行加权处理， 最终输出异常保护后信号给 DAC, 完成功率放大器的异常
保护。 Performing pulse shaping and digital up-conversion processing on the baseband digital signal to obtain an intermediate frequency digital signal, and performing other intermediate frequency processing on the intermediate frequency digital signal, such as equalization, peak clipping, pre-distortion, and quadrature compensation, etc.; Step 502, processing the processed digital signal Performing abnormality monitoring to generate a signal abnormality indicating signal; Step 503: The signal protection module weights the input signal according to different states of the signal abnormality indicating signal, and finally outputs the abnormally protected signal to the DAC to complete the abnormality of the power amplifier. Protection.
上述方案， 其数字信号处理釆用顺序处理方式， 不涉及任何反馈处理模 块， 从而很方便在实际硬件***中实现。 In the above solution, the digital signal processing uses sequential processing, and does not involve any feedback processing module, so that it is convenient to implement in an actual hardware system.
上述功率放大器的异常保护方法， 釆用功率和功率语信息实时监控异常 信号， 当输入信号出现异常时， 对异常的输入信号进行实时的平滑处理， 从 而提高了功率放大器应对异常输入信号的防烧毁能力。 The abnormal protection method of the power amplifier described above uses the power and power language information to monitor the abnormal signal in real time, and when the input signal is abnormal, the abnormal input signal is smoothed in real time, thereby improving the anti-burning of the power amplifier against the abnormal input signal. ability.
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 上述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。 One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the associated hardware to be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
以上实施例仅用以说明本发明的技术方案而非限制， 仅仅参照较佳实施 例对本发明进行了详细说明。 本领域的普通技术人员应当理解， 可以对本发 明的技术方案进行修改或者等同替换， 而不脱离本发明技术方案的精神和范 围， 均应涵盖在本发明的权利要求范围当中。 The above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the invention. It should be understood by those skilled in the art that the present invention may be modified or equivalently substituted without departing from the spirit and scope of the invention.
工业实用性 Industrial applicability
上述功率放大器的异常保护方法和装置， 对功率放大器的数字信号进行 实时监测， 当功率放大器的数字信号出现异常时， 在数字域对输入信号进行 预先的数字信号处理， 从而防止功率放大器出现性能异常或烧毁。 且由于功 率放大器的异常监控全部在数字域进行， 可以通过软件编程实现， 从而提高 功率放大器异常保护的可实现性和保护能力。 因此本发明具有很强的工业实 用性。
The above-mentioned power amplifier abnormality protection method and device perform real-time monitoring on the digital signal of the power amplifier. When the digital signal of the power amplifier is abnormal, the input signal is subjected to pre-digital signal processing in the digital domain, thereby preventing the power amplifier from exhibiting abnormal performance. Or burned. And since the abnormal monitoring of the power amplifier is performed in the digital domain, it can be implemented by software programming, thereby improving the achievability and protection of the power amplifier abnormal protection. Therefore, the present invention has strong industrial applicability.
Claims
1、一种功率放大器的异常保护装置， 包括依次连接的信号产生器、数模 转换（DAC )模块、 调制模块和功率放大器（PA ) , 其中， 该装置还包括位 于所述信号产生器和所述 DAC模块之间的信号保护器和位于所述信号产生 器和所述信号保护器之间的信号监控器， 其中： An abnormality protection device for a power amplifier, comprising a signal generator, a digital-to-analog conversion (DAC) module, a modulation module, and a power amplifier (PA) connected in sequence, wherein the device further includes the signal generator and the a signal protector between the DAC modules and a signal monitor between the signal generator and the signal protector, wherein:
所述信号监控器设置成： 对所述信号产生器输出的数字信号进行实时监 测， 当监测到所述数字信号出现异常时， 产生信号异常指示信号， 并向所述 信号保护器发送该信号异常指示信号； The signal monitor is configured to: perform real-time monitoring on the digital signal output by the signal generator, and when detecting that the digital signal is abnormal, generate a signal abnormality indicating signal, and send the signal abnormality to the signal protector Indication signal
所述信号保护器设置成： 根据所述信号监控器发送的所述信号异常指示 信号， 对所述数字信号进行处理， 并向所述 DAC模块输出加权处理后的结 果。 The signal protector is configured to: process the digital signal according to the signal abnormality indication signal sent by the signal monitor, and output a weighted processed result to the DAC module.
2、根据权利要求 1所述的装置， 其中， 所述信号监控器包括功率计算模 块、 滤波处理模块、 功率语估计模块、 误差计算模块和判决模块， 其中： 所述功率计算模块设置成： 计算所述数字信号的瞬时功率后输出； 所述滤波处理模块设置成： 对所述功率计算模块输出的瞬时功率进行滤 波处理得到所述数字信号的平均功率后输出； 2. The apparatus according to claim 1, wherein the signal monitor comprises a power calculation module, a filter processing module, a power language estimation module, an error calculation module, and a decision module, wherein: the power calculation module is configured to: calculate And outputting the instantaneous power of the digital signal; the filtering processing module is configured to: perform filtering processing on the instantaneous power output by the power calculation module to obtain an average power of the digital signal, and output the same;
所述功率谱估计模块设置成： 估计所述数字信号的功率语后输出； 所述误差计算模块设置成： 根据所述功率语估计模块输出的功率谱与预 设的基准谱计算出频域误差后输出； 所述判决模块设置成： 分别将所述功率计算模块、 所述滤波处理模块和 所述误差计算模块的输出与预配置的判决门限进行比较， 确定所述数字信号 在时域或频域出现异常后， 产生信号异常指示信号， 并向所述信号保护器发 送该信号异常指示信号。 The power spectrum estimation module is configured to: estimate a power afterword output of the digital signal; the error calculation module is configured to: calculate a frequency domain error according to a power spectrum output by the power language estimation module and a preset reference spectrum The output module is configured to: compare the outputs of the power calculation module, the filter processing module, and the error calculation module with a pre-configured decision threshold to determine the digital signal in the time domain or frequency After an abnormality occurs in the domain, a signal abnormality indicating signal is generated, and the signal abnormality indicating signal is sent to the signal protector.
3、 根据权利要求 2所述的装置， 其中： 3. Apparatus according to claim 2 wherein:
所述判决模块设置成按照以下方式将所述误差计算模块的输出与预配置 的判决门限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生信 号异常指示信号， 并向所述信号保护器发送该信号异常指示信号： 根据所述
误差计算模块的输出和频域判决门限确定出所述数字信号存在频域误差后， 产生信号异常指示信号， 并向所述信号保护器发送该信号异常指示信号； 或 者 The decision module is configured to compare the output of the error calculation module with a pre-configured decision threshold according to the following manner, and determine that the digital signal generates a signal abnormality indication signal after an abnormality occurs in the time domain or the frequency domain, and The signal protector sends the signal abnormality indication signal: according to the The output of the error calculation module and the frequency domain decision threshold determine that the digital signal has a frequency domain error, generate a signal abnormality indication signal, and send the signal abnormality indication signal to the signal protector; or
所述判决模块设置成按照以下方式将所述功率计算模块的输出与预配置 的判决门限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生信 号异常指示信号， 并向所述信号保护器发送该信号异常指示信号： 根据所述 功率计算模块的输出和时域瞬时判决门限确定出所述数字信号存在时域误差 后，产生信号异常指示信号，并向所述信号保护器发送该信号异常指示信号； 或者 The determining module is configured to compare the output of the power calculation module with a pre-configured decision threshold according to the following manner, and determine that the digital signal generates a signal abnormality indication signal after an abnormality occurs in the time domain or the frequency domain, and The signal protector sends the signal abnormality indicating signal: after determining the time domain error of the digital signal according to the output of the power calculating module and the time domain instantaneous decision threshold, generating a signal abnormality indicating signal, and sending the signal abnormality signal to the signal protector Send the signal abnormal indication signal; or
所述判决模块设置成按照以下方式将所述滤波处理模块的输出与预配置 的判决门限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生信 号异常指示信号， 并向所述信号保护器发送该信号异常指示信号： 根据所述 滤波处理模块的输出的和时域长时判决门限确定出所述数字信号存在时域误 差后， 产生信号异常指示信号， 并向所述信号保护器发送该信号异常指示信 号。 The decision module is configured to compare the output of the filter processing module with a pre-configured decision threshold according to the following manner, and determine that the digital signal generates a signal abnormality indication signal after an abnormality occurs in the time domain or the frequency domain, and The signal protector sends the signal abnormality indicating signal: after determining the time domain error of the digital signal according to the output of the filtering processing module and the time domain long-term decision threshold, generating a signal abnormality indicating signal, and generating the signal The protector sends the signal abnormality indication signal.
4、根据权利要求 2所述的装置， 其中： 所述误差计算模块设置成釆用如 下公式计算频域误差： 4. Apparatus according to claim 2, wherein: said error calculation module is arranged to calculate a frequency domain error using the following formula:
E(n) = iV|P(E(n) = iV|P(
其中， P(k)、 E(n)分别为功率谱和频域误差， k为最大频率序列， α为调 整因子， Pmm、 Pmax分别为功率谱最小和最大门限， P。为基准语， Emm、 Emax 分别为频域误差的最小值和最大值。 Among them, P(k) and E(n) are power spectrum and frequency domain error respectively, k is the maximum frequency sequence, α is the adjustment factor, Pmm and P max are the power spectrum minimum and maximum threshold respectively, P. For the benchmark, E mm and E max are the minimum and maximum values of the frequency domain error, respectively.
5、 根据权利要求 1-4任一权利要求所述的装置， 其中， 所述信号保护器 包括延时模块、 权窗模块、 平滑模块和选择模块， 其中： The device according to any one of claims 1 to 4, wherein the signal protector comprises a delay module, a weight window module, a smoothing module and a selection module, wherein:
所述延时模块设置成： 对所述信号产生器输出的所述数字信号进行延时 处理后输出；
所述权窗模块设置成： 根据所述信号监控器发送的信号异常指示信号产 生加权窗序列； The delay module is configured to: delay and process the digital signal output by the signal generator; The weight window module is configured to: generate a weighting window sequence according to the signal abnormality indication signal sent by the signal monitor;
所述平滑模块设置成： 根据所述信号监控器发送的信号异常指示信号和 所述权窗模块产生的加权窗序列， 对所述数字信号进行平滑处理后输出； 所述选择模块设置成： 根据所述信号监控器发送的信号异常指示信号在 所述延时模块的输出和所述平滑模块的输出之间进行选择， 并向所述 DAC 模块输出选择结果。 The smoothing module is configured to: after the signal abnormality indication signal sent by the signal monitor and the weighting window sequence generated by the weight window module, perform smoothing processing on the digital signal; and the selection module is configured to: The signal abnormality indication signal sent by the signal monitor selects between an output of the delay module and an output of the smoothing module, and outputs a selection result to the DAC module.
6、根据权利要求 5所述的装置， 其中， 所述平滑模块设置成按照以下方 式根据所述信号监控器发送的信号异常指示信号和所述权窗模块产生的加权 窗序列， 对所述数字信号进行平滑处理后输出： The apparatus according to claim 5, wherein the smoothing module is configured to: according to the signal abnormality indication signal sent by the signal monitor and the weighting window sequence generated by the weight window module, the number is The signal is smoothed and output:
当所述信号异常指示信号为低电平时， 不对所述数字信号进行处理， 当 所述信号异常指示信号为上升沿时， 对所述数字信号进行正加权， 或者， 当 所述信号异常指示信号为下降沿时， 对所述数字信号进行反加权。 When the signal abnormality indicating signal is low level, the digital signal is not processed, when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted, or when the signal abnormality indicating signal For the falling edge, the digital signal is inversely weighted.
7、根据权利要求 6所述的装置， 其中， 所述平滑模块设置成釆用如下公 式对所述数字信号进行处理： 7. Apparatus according to claim 6 wherein: said smoothing module is arranged to process said digital signal using the following formula:
!x(n) * w(n) n < L if Fig @ Posedge !x(n) * w(n) n < L if Fig @ Posedge
0 if Fig == 1 0 if Fig == 1
x(n) * w(L― n) n < L if Fig @ Negedge x(n) * w(L- n) n < L if Fig @ Negedge
其中， x(n)、 s(n)分别为平滑处理前的数字信号和平滑处理后的数字信 号， w(n)为权窗， L为权窗长度， Fig为信号异常指示信号， n为时间序列， Posedge 为所述上升沿， Negedge为所述下降沿。 Where x(n) and s(n) are respectively the digital signal before smoothing and the smoothed digital signal, w(n) is the weight window, L is the weight window length, and Fig is the signal abnormality indicating signal, where n is The time series, Posedge is the rising edge, and Negedge is the falling edge.
8、 一种功率放大器的异常保护方法， 该方法包括： 8. An abnormal protection method for a power amplifier, the method comprising:
对欲输入功率放大器的数字信号进行延时处理； Delaying the digital signal to be input to the power amplifier;
对欲输入功率放大器的数字信号进行实时监测， 当监测到所述数字信号 出现异常时， 产生信号异常指示信号； 根据所述信号异常指示信号， 对所述 数字信号进行平滑处理； Performing real-time monitoring on the digital signal to be input to the power amplifier, and when detecting that the digital signal is abnormal, generating a signal abnormality indicating signal; and smoothing the digital signal according to the signal abnormality indicating signal;
根据所述信号异常指示信号， 对进行平滑处理后的信号和延时处理后的 信号进行选择后输出。 The smoothed signal and the delayed signal are selected and output according to the signal abnormality indication signal.
9、根据权利要求 8所述的方法， 其中， 对欲输入功率放大器的数字信号
进行实时监测， 当监测到所述数字信号出现异常时， 产生信号异常指示信号 的步骤包括： 9. The method according to claim 8, wherein the digital signal to be input to the power amplifier Performing real-time monitoring, when detecting that the digital signal is abnormal, the step of generating a signal abnormality indication signal includes:
计算出所述数字信号的瞬时功率； Calculating the instantaneous power of the digital signal;
对计算出的瞬时功率进行滤波处理得到所述数字信号的平均功率； 估计所述数字信号的功率谱， 根据所述功率谱与预设的基准谱计算出频 域误差； Performing a filtering process on the calculated instantaneous power to obtain an average power of the digital signal; estimating a power spectrum of the digital signal, and calculating a frequency domain error according to the power spectrum and a preset reference spectrum;
分别将所述瞬时功率、 所述平均功率和所述频域误差与预配置的判决门 限进行比较， 确定所述数字信号在时域或频域出现异常后， 产生信号异常指 示信号。 The instantaneous power, the average power, and the frequency domain error are respectively compared with a pre-configured decision threshold to determine that the digital signal generates a signal abnormality signal after an abnormality occurs in the time domain or the frequency domain.
10、 根据权利要求 8或 9所述的方法， 其中， 根据所述信号异常指示信 号， 对所述数字信号进行平滑处理的步骤包括： 10. The method according to claim 8 or 9, wherein the step of smoothing the digital signal according to the signal abnormality indication signal comprises:
根据所述信号异常指示信号， 产生加权窗序列； Generating a weighting window sequence according to the signal abnormality indication signal;
当所述信号异常指示信号为低电平时， 不对所述数字信号进行处理； 当 所述信号异常指示信号为上升沿时， 对所述数字信号进行正加权； 当所述信 号异常指示信号为下降沿时， 对所述数字信号进行反加权。
When the signal abnormality indicating signal is low level, the digital signal is not processed; when the signal abnormality indicating signal is a rising edge, the digital signal is positively weighted; when the signal abnormality indicating signal is falling The digital signal is inversely weighted along the time.
Applications Claiming Priority (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 |
| CN201110455824.4 | 2011-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013097360A1 true WO2013097360A1 (en) | 2013-07-04 |
Family
ID=48678926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2012/072512 WO2013097360A1 (en) | 2011-12-30 | 2012-03-19 | Abnormal protection method and apparatus of a power amplifier |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103187936B (en) |
| WO (1) | WO2013097360A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080260185A1 (en) * | 2007-04-18 | 2008-10-23 | Ching Hung Tseng | Method And Apparatus For Automatically Detecting Audio Signal And Sending Control Signal |
| CN102055412A (en) * | 2010-12-02 | 2011-05-11 | 华为技术有限公司 | Power amplifier protective circuit, communication equipment and method |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004211669A (en) * | 2003-01-09 | 2004-07-29 | Toshiba Corp | Servo valve controlling device and abnormality detection device of servo valve control system |
| 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 |
-
2011
- 2011-12-30 CN CN201110455824.4A patent/CN103187936B/en active Active
-
2012
- 2012-03-19 WO PCT/CN2012/072512 patent/WO2013097360A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080260185A1 (en) * | 2007-04-18 | 2008-10-23 | Ching Hung Tseng | Method And Apparatus For Automatically Detecting Audio Signal And Sending Control Signal |
| CN102055412A (en) * | 2010-12-02 | 2011-05-11 | 华为技术有限公司 | Power amplifier protective circuit, communication equipment and method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103187936A (en) | 2013-07-03 |
| CN103187936B (en) | 2017-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11394412B2 (en) | Predistortion circuit, method for generating a predistorted baseband signal, control circuit for a predistortion circuit, method to determine parameters for a predistortion circuit, and apparatus and method for predistorting a baseband signal | |
| US8519789B2 (en) | Pre-distortion for fast power transient waveforms | |
| US7755429B2 (en) | System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers | |
| JP5621666B2 (en) | Digital predistortion processing apparatus and method | |
| JP2016029803A (en) | Remotely reconfigurable power amplifier system and method | |
| WO2013107369A1 (en) | Peak clipping method and device for broadband signals of multiple frequency bands | |
| WO2007000495A1 (en) | Data processing method, pre-distortion arrangement, transmitter, network element and base station | |
| CN101562478A (en) | Method for adaptively adjusting CFR threshold and radio frequency zooming system | |
| WO2009009987A1 (en) | Method and device for tracking doherty power amplification servic | |
| Jeong et al. | Wideband envelope tracking power amplifier with reduced bandwidth power supply waveform | |
| US8837635B2 (en) | Controlling a transmit path based on monitored error vector magnitude (EVM) performance | |
| CN101969423A (en) | Method and device for reducing peak factors and remote radio system | |
| JP3905331B2 (en) | Method and apparatus for improving efficiency of transmitter for wireless device and power amplifier in transmitter | |
| CN103518331B (en) | Transmitter and method for signal transmission | |
| US8233852B2 (en) | Calibration techniques for non-linear devices | |
| US9042434B2 (en) | Filter | |
| WO2013097360A1 (en) | Abnormal protection method and apparatus of a power amplifier | |
| US9148096B2 (en) | Device and method for controlling an input signal of a power amplifier | |
| CN101447966B (en) | A method of controlling self-adapting adjusting peak-to-average ratio of threshold | |
| WO2012119400A1 (en) | Signal sequence processing method and base station | |
| Nair et al. | A comparative study on digital predistortion techniques for Doherty amplifier for LTE applications | |
| GB2527816A (en) | Improvements to digital pre-distortion processing | |
| WO2014005549A1 (en) | Overpower protection method and device for pa | |
| JP2013247501A (en) | Power amplification device | |
| US20230126040A1 (en) | Power amplifier linearity control based on power amplifier operating mode or power level |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12863778 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 12863778 Country of ref document: EP Kind code of ref document: A1 |