WO2020258776A1 - 一种应用预失真的功放保护装置及功放保护方法 - Google Patents

一种应用预失真的功放保护装置及功放保护方法 Download PDF

Info

Publication number
WO2020258776A1
WO2020258776A1 PCT/CN2019/127161 CN2019127161W WO2020258776A1 WO 2020258776 A1 WO2020258776 A1 WO 2020258776A1 CN 2019127161 W CN2019127161 W CN 2019127161W WO 2020258776 A1 WO2020258776 A1 WO 2020258776A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
predistortion
state
power amplifier
processor
Prior art date
Application number
PCT/CN2019/127161
Other languages
English (en)
French (fr)
Inventor
俞利光
雷文平
胡晓飞
Original Assignee
三维通信股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三维通信股份有限公司 filed Critical 三维通信股份有限公司
Publication of WO2020258776A1 publication Critical patent/WO2020258776A1/zh

Links

Images

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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • 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

Definitions

  • This application belongs to the field of communication power amplification, and specifically relates to a power amplifier protection device and a power amplifier protection method using predistortion.
  • Power amplifiers are widely used in mobile communication products, and are mainly used to amplify high-power signals, increase signal strength, and improve signal coverage.
  • the speed required for communication is getting higher and higher, and the bandwidth of the signal is getting wider; but the bandwidth supported by the power amplifier is limited, and the signal bandwidth beyond the application range will cause the power amplifier to be damaged; at the same time, Due to the requirements for equipment efficiency, existing power amplifiers generally use predistortion technology to improve linearity and efficiency, but predistortion technology also requires signal bandwidth and power amplifier bandwidth.
  • the amplitude and phase characteristics of the power amplifier at different frequency points affect it Very large, especially when the signal frequency changes rapidly, the response speed of the predistorter is limited. A set of wrong correction coefficients may be added to the signal of the next frequency, which may deteriorate the linearity of the power amplifier, or even cause the power amplifier damage.
  • Power amplifier output port plus power detection when the average power or peak power reaches the set value, reduce the input power of the power amplifier tube; 2.
  • the power supply current of the power amplifier tube Detection, when the current reaches the set value, reduce the input power of the power amplifier tube; 3.
  • Add a limiter to the power amplifier input port, and reduce the power of the peak signal when the peak power of the input signal is greater than the limiter threshold; 4.
  • Power amplifier A filter is added to the input port to filter out-of-band spurs of the signal.
  • the average power or peak power of the power amplifier caused by the predistortion technology to produce out-of-band spurious signals has no obvious change in the average power or peak power of the power amplifier.
  • the power amplifier protection methods 1-3 have limited effects; at the same time, because Due to the characteristics of predistortion technology, in addition to useful signals, the input signal of the power amplifier when the equipment is working normally also has some signals for nonlinear correction outside the band, so the fourth scheme is not applicable.
  • At least some of the embodiments of the present application provide a power amplifier protection device and a power amplifier protection method using predistortion, so as to at least partially solve the problem that the power amplifier protection method provided in the related art has limited effect or the device works normally due to the characteristics of the predistortion technology.
  • the input signal of the power amplifier has some technical problems outside the band for nonlinear correction.
  • a power amplifier protection device using predistortion which includes a first signal channel selection switch, a second signal channel selection switch, a predistortion processor, and a comparator.
  • the predistortion processor Arranged on the predistortion channel, the first signal channel selection switch and the second signal channel selection switch control the input signal to switch between the through channel and the predistortion channel according to the control signal output by the comparator.
  • the predistortion processor includes a first input port and a second input port, the first input port receives the output signal of the first signal channel selection switch, and the second input port receives the The control signal of the comparator.
  • the predistortion processor includes a first output port and a second output port.
  • the first output port is used to output the predistorted signal to the second signal channel selection switch,
  • the second output port is used to output the state signal of the predistortion processor to the comparator.
  • the state signal is used to indicate the state of the predistortion processor, and the state of the predistortion processor includes a predistortion state and a reset state.
  • the comparator includes a first receiving end, a second receiving end, and a third receiving end, wherein the first receiving end is used to receive the spurious power detection value V det , and the second receiving end The terminal is used to receive the spurious power reference value V ref , and the third receiving terminal is used to receive the status signal output by the predistortion processor.
  • the comparator When V det ⁇ V ref , the comparator outputs a control signal to control the first signal channel selection
  • the switch and the second signal channel selection switch select the through channel and control the pre-distortion processor to enter the reset state; when V det ⁇ V ref and based on the received state signal of the pre-distortion processor, determine the pre-distortion processor
  • the comparator When the state is in the predistortion state, the comparator outputs a control signal to control the first signal channel selection switch and the second signal channel selection switch to gate the predistortion channel.
  • the resetting of the predistortion processor can reset the calibration coefficient, and the reset correction coefficient is calculated according to the nonlinear characteristic of the current channel and conforms to the nonlinear characteristic of the current channel.
  • it further includes a signal coupler, a filter, and a power detector connected in sequence, and the signal coupler is used to couple a part of the signal output by the second signal channel selection switch to the filter.
  • the filter is used to filter part of the signal and output spurious signals;
  • the power detector is used to detect the power of the spurious signal output by the filter and output the spurious power detection signal to the comparator.
  • the first signal channel selection switch and the second signal channel selection switch are directly connected to form a through channel; the first input port of the predistortion processor and the first signal channel selection switch When connected, the first output port of the predistortion processor outputs the predistorted signal to the second signal channel selection switch to form a predistortion channel.
  • a power amplifier protection method using predistortion including:
  • the predistortion channel is gated and the input signal is predistorted
  • V det is the spurious power detection value and V ref is the spurious power reference value
  • the pre-distortion channel is gated, and the pre-distortion processor re-enters the pre-distortion state to perform pre-distortion processing on the input signal.
  • the reset state is to initialize and recalculate the correction coefficient of the predistortion processor, and automatically enter the predistortion state after resetting.
  • the predistortion state is to calculate a predistortion coefficient reflecting the nonlinear characteristics of the current signal channel according to the feedback signal, and add a nonlinear distortion signal to the input signal, and the nonlinear distortion signal is The non-linear distortion of the system including the power amplifier is just the opposite.
  • the predistortion processor is controlled to switch between the predistortion state and the reset state, so as to avoid the damage of successful amplification caused by the wide bandwidth and large amplitude spurious signals generated out of band, while maintaining the normal
  • the out-of-band scattering signal is used for nonlinear correction.
  • Fig. 1 is a schematic structural diagram of a power amplifier protection device applying predistortion according to one of the embodiments of the present application.
  • Fig. 2 is a flowchart of a power amplifier protection method applying predistortion according to one of the embodiments of the present application.
  • FIG. 1 is a schematic structural diagram of a power amplifier protection device applying predistortion according to one of the embodiments of the present application.
  • the power amplifier protection device applying predistortion includes a first signal channel selection switch 1, a second signal channel selection switch 2.
  • the first signal channel selection switch 1 and the second signal channel selection switch 2 receive the control signal output by the comparator 7 to realize the switching of the input signal between the through channel and the predistortion channel.
  • the through channel does not perform predistortion processing on the signal;
  • the first input port of the predistortion processor 3 is connected to the first signal channel selection switch 1, and the first input port of the predistortion processor 3 receives the gated input signal S1.
  • the second input port of the distortion processor 3 receives the control signal V2 of the comparator 7; the first output port of the predistortion processor 3 outputs the predistorted signal S2 to the second signal channel selection switch 2;
  • the second output port outputs the state signal V4 of the pre-distortion processor 2 to the comparator 7, which is used to output the state of the pre-distortion processor 2 to the comparator 7;
  • the state of the pre-distortion processor 2 includes two types, namely the pre-distortion state And reset state.
  • the predistortion state is to calculate the predistortion coefficient reflecting the nonlinear characteristics of the current signal channel based on the feedback signal, and add a nonlinear distortion signal to the input signal. Its characteristics are exactly the opposite of the nonlinear distortion of the system including the power amplifier. Linear optimization; the predistortion can be digital predistortion or analog predistortion.
  • the reset state refers to the initialization and recalculation of the correction coefficient of the predistortion processor 3, and the predistortion state is automatically entered after the reset is completed.
  • the signal coupler 4 couples part of the signal output by the second signal channel selection switch 2 to the filter 5, and outputs another part of the signal to the next-stage signal link.
  • the filter 5 filters the input signal, and its output is a signal in the frequency domain of spurious signals that may cause damage to the power amplifier.
  • the power detector 6 performs power detection on the spurious signal output by the filter 5.
  • the first receiving end of the comparator 7 receives the spurious power detection value V det output by the power detector 6, the second receiving end receives the spurious power reference value V ref , and the third receiving end receives the status signal output by the predistortion processor 3. V4.
  • V det ⁇ V ref control the two signal channel selection switches to select the through channel and control the predistortion processor 3 to enter the reset state; when V det ⁇ V ref and the received state signal of the predistortion processor 3
  • V4 When V4 is in the predistortion state, it controls the two signal channel selection switches to gate the predistortion channel.
  • the value of the stray power reference value V ref is generally selected between the two stray power detection values output by the power detector when the system is stable and the predistortion deteriorates to cause damage to the power amplifier.
  • a power amplifier protection method using predistortion is also provided.
  • Fig. 2 is a flowchart of a power amplifier protection method using predistortion according to one of the embodiments of the present application. As shown in Fig.
  • the method includes the following steps: first, in the initial state or stable working state of the system, two signal channels are selected The switch gates the predistortion channel, the input signal S1 enters the first signal channel selection switch 1, and the second signal channel selection switch 2 selects the predistortion channel, then the signal enters the predistortion processor 3, and after the predistortion process, the signal channel selection switch is selected 2 output, the signal S2 is divided into two parts after the signal coupler 4, a part of the signal S21 is output to the next-level signal link, and the other part of the signal S22 enters the filter 5; because when the system is in the initial state or stable working state, The out-of-band spurious signal generated by the distortion processor is relatively small.
  • the out-of-band spurious signal is a nonlinear distortion signal used for compensation. Therefore, the spurious signal output by the filter 5 is relatively small, and the spurious power output by the power detector 6
  • the detection value V det is also relatively small; in the comparator 7, since V det ⁇ V ref , the comparator 7 outputs control signals V1 and V3 to make the two signal channel selection switches select the predistortion channel, and output control signal V2 to control the predistortion processing
  • the device 3 is in a predistortion state.
  • the comparator 7 When the frequency jump or amplitude jump of the input signal S1 causes the correction coefficient of the predistortion processor to not meet the current channel nonlinear characteristics and generate a large number of spurious signals, the output signal of the signal coupler 4 and filter 5 The spurious signal will be larger, and the spurious power detection value V det output by the power detector will also become larger.
  • V det ⁇ V ref the comparator 7 outputs signals V1 and V3 to control the two signal channel selection switches to select through Channel, the output signal V2 at the same time controls the predistortion processor 3 to perform a reset operation.
  • the input signal has not been processed by the predistortion processor, and the output signal S21 will not have out-of-band spurious signals and will not damage the power amplifier.
  • the output signal S22 will pass through the signal coupler 4, filter 5 and power detector 6.
  • the detected spurious power detection value V det will also decrease after detection, and its value should be much smaller than the spurious power reference value V ref .
  • the predistortion processor 3 starts to initialize the correction coefficients and restarts the calculation of the nonlinear characteristics of the channel after receiving the reset signal output by the comparator 7, and automatically enters the predistortion state after the reset ends; when the comparator 7 receives the When the signal satisfies V det ⁇ V ref and the received predistortion processor state signal V4 is in the predistortion state, the two signal selection switches are controlled to gate the predistortion channel; the predistortion processor 3 enters the predistortion state again, because at this time The pre-distortion processor 3 starts from the reset state, and its correction coefficient is calculated according to the nonlinear characteristics of the current channel, and conforms to the nonlinear characteristics of the current channel, so the pre-distortion processor will not generate large spurious signals. The device enters a stable working state again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)

Abstract

本申请公开了一种应用预失真的功放保护装置，包括信号通道选择开关、预失真处理器和比较器，所述预失真处理器布置在预失真通道上，所述信号通道选择开关接收比较器输出的控制信号控制输入信号在直通通道和预失真通道之间切换；本申请还公开了一种应用预失真的功放保护方法。本申请通过对杂散信号的检测，控制预失真处理器在预失真状态和复位状态之间切换，避免因带外产生的带宽较宽且幅度较大杂散信号造成功放的损坏，同时又保留正常的带外散射信号用于非线性校正。

Description

一种应用预失真的功放保护装置及功放保护方法 技术领域
本申请属于通信功率放大领域，具体是一种应用预失真的功放保护装置及功放保护方法。
背景技术
功率放大器(以下称为功放)广泛应用移动通信产品，主要用于对信号的高功率的放大，增加信号强度，提高信号覆盖的范围。随着市场的需求和技术的进步，通信需要的速率越来越高，信号的带宽也越来越宽；但是功放支持的带宽是受限的，信号带宽超出应用范围会导致功放损坏；同时，由于对设备效率的要求现有的功放普遍应用预失真技术来提升线性和效率，但预失真技术对信号的带宽和功放的带宽也有要求，功放在不同频点的幅度特性和相位特性对其影响很大，特别是在信号频率快速变化时，预失真器的响应速度受限，可能把一组错误的校正系数加到下一个频率的信号上，很可能会使功放的线性恶化，甚至导致功放损坏。
这种由于信号频率变化导致功放管损坏的现象从频域上看是因为功放管的输入信号除了有用信号外还会在带外产生带宽较宽且幅度较大的杂散信号，该杂散信号相较正常预失真校正信号，其带外的信号功率要大很多，当杂散信号的带宽和幅度超过功放管的承受极限时功放管就会损坏。
相关技术对功放的保护方法通常有如下几种方式：1.功放输出口加功率检测，当平均功率或峰值功率达到设定值时减小功放管的输入功率；2.功放管的电源加电流检测，当电流达到设定值时减小功放管的输入功率；3.功放输入口加限幅器，当输入信号的峰值功率大于限幅器的门限时减小峰值信号的功率；4.功放输入口加滤波器，滤除信号的带外杂散。但是，这种由于预失真技术产生带外杂散信号而引起功放损坏的线性其信号的平均功率或峰值功率没有明显的变化，因此，第1-3种功放保护方法的作用有限；同时，由于预失真技术的特性，设备正常工作时功放的输入信号除有用信号外在带外也有部分用于非线性校正的信号，因此第4种方案也不适用。
发明内容
本申请至少部分实施例提供了一种应用预失真的功放保护装置及功放保护方法， 以至少部分地解决相关技术中所提供的功放的保护方法作用有限或者由于预失真技术的特性，设备正常工作时功放的输入信号除有用信号外在带外也有部分用于非线性校正的信号的技术问题。
在本申请其中一实施例中，提供了一种应用预失真的功放保护装置，包括第一信号通道选择开关、第二信号通道选择开关、预失真处理器和比较器，所述预失真处理器布置在预失真通道上，所述第一信号通道选择开关和第二信号通道选择开关根据比较器输出的控制信号，控制输入信号在直通通道和预失真通道之间切换。
在本申请的一个可选实施例中，所述预失真处理器包括第一输入口和第二输入口，第一输入口接收第一信号通道选择开关的输出信号，第二输入口接收所述比较器的控制信号。
在本申请的一个可选实施例中，所述预失真处理器包括第一输出口和第二输出口，第一输出口用于将经过预失真处理的信号输出至第二信号通道选择开关，第二输出口用于输出预失真处理器的状态信号至比较器。
在本申请的一个可选实施例中，所述状态信号用于表示预失真处理器的状态，所述预失真处理器的状态包括预失真状态和复位状态。
在本申请的一个可选实施例中，所述比较器包括第一接收端、第二接收端和第三接收端，其中第一接收端用于接收杂散功率检测值V det，第二接收端用于接收杂散功率参考值V ref，第三接收端用于接收预失真处理器输出的状态信号，当V det≥V ref时，比较器输出控制信号，控制所述第一信号通道选择开关和所述第二信号通道选择开关选通直通通道，并控制预失真处理器进入复位状态；当V det<V ref时且基于接收到的预失真处理器的状态信号确定预失真处理器的状态处于预失真状态时，比较器输出控制信号，控制所述第一信号通道选择开关和所述第二信号通道选择开关选通预失真通道。对预失真处理器的复位可以重置校真系数，重置的校正系数根据当前通道的非线性特性计算的，符合当前通道的非线性特性。
在本申请的一个可选实施例中，还包括依次连接的信号耦合器、滤波器和功率检测器，所述信号耦合器用于将所述第二信号通道选择开关输出的部分信号耦合输出至滤波器；所述滤波器用于对部分信号进行滤波，输出杂散信号；所述功率检测器用于对滤波器输出的杂散信号进行功率检测，并输出杂散功率检测信号至比较器。该部分结构可以对部分信号中包括的杂散信号进行精确的分析定量。
在本申请的一个可选实施例中，所述第一信号通道选择开关和第二信号通道选择开关直接连接构成直通通道；所述预失真处理器的第一输入口和第一信号通道选择开关连接，预失真处理器第一输出口将经过预失真处理的信号输出至第二信号通道选择开关，构成预失真通道。
在本申请另一实施例中，还提供了一种应用预失真的功放保护方法，包括：
在初始状态或稳定工作状态下，选通预失真通道，对输入信号作预失真处理；
当V det≥V reff时，选通直通通道，并控制预失真处理器进入复位状态，其中V det是杂散功率检测值，V ref是杂散功率参考值；
当V det<V ref时，选通预失真通道，预失真处理器重新进入预失真状态，对输入信号作预失真处理。
在本申请的一个可选实施例中，所述复位状态是对预失真处理器的校正系数进行初始化并重新计算，复位结束后自动进入预失真状态。
在本申请的一个可选实施例中，所述预失真状态是根据反馈信号计算出反映当前信号通道非线性特性的预失真系数，并为输入信号加入非线性失真信号，该非线性失真信号与包括功放在内的系统非线性失真恰好相反。
通过对杂散信号的检测，控制预失真处理器在预失真状态和复位状态之间切换，避免因带外产生的带宽较宽且幅度较大杂散信号造成功放的损坏，同时又保留正常的带外散射信号用于非线性校正。
附图说明
图1是根据本申请其中一实施例的应用预失真的功放保护装置的结构示意图。
图2是根据本申请其中一实施例的应用预失真的功放保护方法的流程图。
具体实施方式
下面结合附图对本申请作进一步说明。
在本申请其中一实施例中，提供了一种应用预失真的功放保护装置。图1是根据本申请其中一实施例的应用预失真的功放保护装置的结构示意图，如图1所示，应用预失真的功放保护装置包括第一信号通道选择开关1、第二信号通道选择开关2、预失真处理器3、信号耦合器4、滤波器5、功率检测器6、比较器7。
第一信号通道选择开关1和第二信号通道选择开关2接收比较器7输出的控制信 号，实现输入信号在直通通道和预失真通道间切换。其中，直通通道不对信号做预失真处理；预失真处理器3的第一输入口和第一信号通道选择开关1连接，预失真处理器3第一输入口接收经选通的输入信号S1，预失真处理器3第二输入口接收比较器7的控制信号V2；预失真处理器3第一输出口将经过预失真处理的信号S2输出至第二信号通道选择开关2；预失真处理器3第二输出口输出预失真处理器2的状态信号V4至比较器7，用于把预失真处理器2的状态输出给比较器7；预失真处理器2的状态包括两种，分别为预失真状态和复位状态。
预失真状态为根据反馈信号计算出反映当前信号通道非线性特性的预失真系数，并为输入信号加入非线性失真信号，其特性与包括功放在内的系统非线性失真恰好相反，最终使系统的线性优化；该预失真可以是数字预失真也可以是模拟预失真。
复位状态是指对预失真处理器3的校正系数进行初始化并重新计算，复位结束后自动进入预失真状态。
信号耦合器4把第二信号通道选择开关2输出的部分信号耦合输出至滤波器5，另一部分信号输出给下一级信号链路。
滤波器5对输入信号进行滤波，其输出为可能引起功放损坏的杂散信号频域内的信号。
功率检测器6对滤波器5输出的杂散信号做功率检测。
比较器7的第一接收端接收功率检测器6输出的杂散功率检测值V det，第二接收端接收杂散功率参考值V ref，第三接收端接收预失真处理器3输出的状态信号V4。当V det≥V ref时，控制两个信号通道选择开关选通直通通道，并控制预失真处理器3进入复位状态；当V det<V ref时且接收到的预失真处理器3的状态信号V4处于预失真状态时控制两个信号通道选择开关选通预失真通道。
杂散功率参考值V ref的取值一般取在系统稳定工作和预失真恶化到导致功放损坏时功率检测器输出的两个杂散功率检测值之间。
在本申请其中一实施例中，还提供了一种应用预失真的功放保护方法。图2是根据本申请其中一实施例的应用预失真的功放保护方法的流程图，如图2所示，该方法包括如下步骤：首先在系统初始状态或稳定工作状态下，两个信号通道选择开关选通预失真通道，输入信号S1进入第一信号通道选择开关1，第二信号通道选择开关2选择预失真通道，则信号进入预失真处理器3，经预失真处理后从信号通道选择开关2输出，该信号S2经信号耦合器4后分为两部分，一部分信号S21输出到下一级信号链路，另一部分信号S22进入滤波器5；由于当系统初始状态或稳定工作状态下，预 失真处理器产生的带外杂散信号比较小，该带外杂散信号是用于补偿的非线性失真信号，因此滤波器5输出的杂散信号比较小，功率检测器6输出的杂散功率检测值V det也比较小；在比较器7中由于V det<V ref，则比较器7输出控制信号V1、V3使两个信号通道选择开关选择预失真通道，输出控制信号V2控制预失真处理器3处于预失真状态。
当输入信号S1发生频率跳变或幅度跳变等导致预失真处理器的校正系数不符合当前的通道非线性特性并产生大量杂散信号时，此时经信号耦合器4和滤波器5输出的杂散信号会比较大，功率检测器输出的杂散功率检测值V det也会变大，当V det≥V ref时，比较器7输出信号V1，V3分别控制两个信号通道选择开关选择直通通道，同时输出信号V2控制预失真处理器3进行复位操作。
此时，输入信号没有经过预失真处理器处理，输出信号S21不会有带外的杂散信号，不会对功放产生损伤，输出信号S22经信号耦合器4、滤波器5及功率检测器6检测后的杂散功率检测值V det也会降低，其值应远小于杂散功率参考值V ref。同时预失真处理器3在接收到比较器7输出的复位信号后开始进行校正系数初始化并重新开始计算通道的非线性特性，并在复位结束后自动进入预失真状态；当比较器7接收到的信号满足V det<V ref且接收到的预失真处理器状态信号V4处于预失真状态时，控制两个信号选择开关选通预失真通道；预失真处理器3重新进入预失真状态，由于此时的预失真处理器3是从复位状态开始的，其校正系数是根据当前通道的非线性特性计算的，符合当前通道的非线性特性，因此预失真处理器不会产生很大的杂散信号，装置再次进入稳定工作状态。
以上所述及图中所示的仅是本申请的优选实施方式。应当指出，对于本领域的普通技术人员来说，在不脱离本申请的原理的前提下，还可以作出若干变型和改进，这些也应视为属于本申请的保护范围。

Claims (10)

  1. 一种应用预失真的功放保护装置，包括第一信号通道选择开关(1)、第二信号通道选择开关(2)、预失真处理器(3)和比较器(7)，所述预失真处理器(3)布置在预失真通道上，所述第一信号通道选择开关(1)和所述第二信号通道选择开关(2)根据比较器(7)输出的控制信号，控制输入信号在直通通道和预失真通道之间切换。
  2. 如权利要求1所述的应用预失真的功放保护装置，其中，所述预失真处理器(3)包括第一输入口和第二输入口，所述第一输入口接收第一信号通道选择开关(1)的输出信号，所述第二输入口接收所述比较器(7)的控制信号。
  3. 如权利要求1所述的应用预失真的功放保护装置，其中，所述预失真处理器(3)包括第一输出口和第二输出口，所述第一输出口用于将经过预失真处理的信号输出至第二信号通道选择开关(2)，所述第二输出口用于输出预失真处理器(2)的状态信号至比较器(7)。
  4. 如权利要求3所述的应用预失真的功放保护装置，其中，所述状态信号用于表示预失真处理器(2)的状态，所述预失真处理器(2)的状态包括预失真状态和复位状态。
  5. 如权利要求1所述的应用预失真的功放保护装置，其中，所述比较器(7)包括第一接收端、第二接收端和第三接收端，其中，所述第一接收端用于接收杂散功率检测值V det，所述第二接收端用于接收杂散功率参考值V ref，所述第三接收端用于接收预失真处理器(3)输出的状态信号，当V det≥V ref时，比较器(7)输出控制信号，控制所述第一信号通道选择开关(1)和所述第二信号通道选择开关(2)选通直通通道，并控制预失真处理器(3)进入复位状态；当V det<V ref时且基于接收到的预失真处理器(3)的状态信号确定预失真处理器(3)的状态处于预失真状态时，比较器(7)输出控制信号，控制所述第一信号通道选择开关(1)和所述第二信号通道选择开关(2)选通预失真通道。
  6. 如权利要求1所述的应用预失真的功放保护装置，其中，还包括依次连接的信号耦合器(4)、滤波器(5)和功率检测器(6)，所述信号耦合器(4)用于将所述第二信号通道选择开关(2)输出的部分信号耦合输出至滤波器(5)；所述滤波器(5)用于对所述部分信号进行滤波，输出杂散信号；所述功率检测器(6)用于对滤波器(5)输出的杂散信号进行功率检测，并输出杂散功率检测信号至比较器(7)。
  7. 如权利要求1至6中任一项所述的应用预失真的功放保护装置，其中，所述第一信号通道选择开关(1)和第二信号通道选择开关(2)直接连接构成直通通道；所述预失真处理器(3)的第一输入口和第一信号通道选择开关(1)连接，预失真处理器(3)第一输出口将经过预失真处理的信号输出至第二信号通道选择开关(2)，构成预失真通道。
  8. 一种应用预失真的功放保护方法，包括：
    在初始状态或稳定工作状态下，选通预失真通道，对输入信号作预失真处理；
    当V det≥V reff时，选通直通通道，并控制预失真处理器进入复位状态，其中V det是杂散功率检测值，V ref是杂散功率参考值；
    当V det<V ref时，选通预失真通道，预失真处理器重新进入预失真状态，对输入信号作预失真处理。
  9. 如权利要求8所述的应用预失真的功放保护方法，其中，所述复位状态是对预失真处理器的校正系数进行初始化并重新计算，复位结束后自动进入预失真状态。
  10. 如权利要求8所述的应用预失真的功放保护方法，其中，所述预失真状态是根据反馈信号计算出反映当前信号通道非线性特性的预失真系数，并为输入信号加入非线性失真信号，该非线性失真信号与包括功放在内的系统非线性失真恰好相反。
PCT/CN2019/127161 2019-06-27 2019-12-20 一种应用预失真的功放保护装置及功放保护方法 WO2020258776A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910568561.4A CN110190822A (zh) 2019-06-27 2019-06-27 一种应用预失真的功放保护装置及功放保护方法
CN201910568561.4 2019-06-27

Publications (1)

Publication Number Publication Date
WO2020258776A1 true WO2020258776A1 (zh) 2020-12-30

Family

ID=67723801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/127161 WO2020258776A1 (zh) 2019-06-27 2019-12-20 一种应用预失真的功放保护装置及功放保护方法

Country Status (2)

Country Link
CN (1) CN110190822A (zh)
WO (1) WO2020258776A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110190822A (zh) * 2019-06-27 2019-08-30 三维通信股份有限公司 一种应用预失真的功放保护装置及功放保护方法
CN117319150A (zh) * 2022-06-24 2023-12-29 中兴通讯股份有限公司 数字预失真环路时延控制方法、装置、电子设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1882127A (zh) * 2006-05-16 2006-12-20 东南大学 多模式数字线性化装置及方法
CN106208985A (zh) * 2016-08-23 2016-12-07 池州睿成微电子有限公司 一种基于查表法的自适应数字预失真方法及系统
CN109004908A (zh) * 2018-09-11 2018-12-14 京信通信系统（中国）有限公司 自适应线性化的功率放大系统
CN110190822A (zh) * 2019-06-27 2019-08-30 三维通信股份有限公司 一种应用预失真的功放保护装置及功放保护方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6275106B1 (en) * 2000-02-25 2001-08-14 Spectrian Corporation Spectral distortion monitor for controlling pre-distortion and feed-forward linearization of rf power amplifier
JP2003318752A (ja) * 2002-04-25 2003-11-07 Matsushita Electric Ind Co Ltd 無線通信装置および送信機
CN1516493A (zh) * 2003-01-10 2004-07-28 深圳市中兴通讯股份有限公司上海第二 一种功率放大器线性化方法和线性功率放大器装置
US20040264596A1 (en) * 2003-06-27 2004-12-30 Andrew Corporation, A Delaware Corporation Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics
US7109792B2 (en) * 2003-09-17 2006-09-19 Andrew Corporation Table-based pre-distortion for amplifier systems
CN1917403B (zh) * 2005-08-16 2011-07-20 中兴通讯股份有限公司 一种基于fpga实现的保护功放的方法和装置
JP5354583B2 (ja) * 2009-03-31 2013-11-27 株式会社ダイヘン 高周波電源装置及び高周波電源装置の高周波電力検出装置
CN102202022B (zh) * 2011-03-31 2014-02-05 京信通信系统（中国）有限公司 一种dpd系统中保护功放的方法及装置
US8670730B2 (en) * 2011-08-24 2014-03-11 Spectralux Corporation Power efficient radio frequency transmitter
CN103326674B (zh) * 2012-03-20 2017-07-11 中兴通讯股份有限公司 功率放大器的保护方法及装置
CN103457548B (zh) * 2012-06-01 2016-06-15 京信通信系统（中国）有限公司 射频电路功率放大器保护装置及发射机
CN104009950A (zh) * 2013-02-21 2014-08-27 京信通信系统（广州）有限公司 一种数字预失真功放系统中保护功放的方法和装置
CN203788246U (zh) * 2014-03-14 2014-08-20 京信通信系统（中国）有限公司 Dpd系统中射频功率放大器的保护装置及发射机
CN107565914B (zh) * 2017-07-26 2021-01-26 东南大学 共发双带包络跟踪功率放大器的数字预失真系统及其方法
CN107395538B (zh) * 2017-08-01 2019-11-19 厦门大学 一种频率选择性谐波抑制的数字预失真系统及方法
CN108631794B (zh) * 2018-04-09 2020-03-13 京信通信系统（中国）有限公司 数字预失真模块输出信号的控制方法和系统
CN210120537U (zh) * 2019-06-27 2020-02-28 三维通信股份有限公司 一种应用预失真的功放保护装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1882127A (zh) * 2006-05-16 2006-12-20 东南大学 多模式数字线性化装置及方法
CN106208985A (zh) * 2016-08-23 2016-12-07 池州睿成微电子有限公司 一种基于查表法的自适应数字预失真方法及系统
CN109004908A (zh) * 2018-09-11 2018-12-14 京信通信系统（中国）有限公司 自适应线性化的功率放大系统
CN110190822A (zh) * 2019-06-27 2019-08-30 三维通信股份有限公司 一种应用预失真的功放保护装置及功放保护方法

Also Published As

Publication number Publication date
CN110190822A (zh) 2019-08-30

Similar Documents

Publication Publication Date Title
US8982991B2 (en) Digital pre-distortion method and apparatus thereof for changing memory degree depending on input level
WO2020258776A1 (zh) 一种应用预失真的功放保护装置及功放保护方法
CN102064774B (zh) 一种功率放大电路实现方法及功率放大装置
US9190963B2 (en) System and method for fast polynomial pre-distortion
EP0454812A1 (en) Improvements in or relating to amplifiers
KR101841670B1 (ko) 다음 스테이지 입력 임피던스 및 다중 바이어싱을 사용하는 아웃페이징 전력 증폭기 신호 분리기
US6791410B2 (en) Feedforward amplifier and method of improving the performance thereof
US8624670B2 (en) Method and apparatus for improving digital pre-distortion performance
JP5267321B2 (ja) 増幅器、送信装置および利得補償方法
CA2720162C (en) Feedforward linearization of rf power amplifiers
CN101807886B (zh) 一种射频功率放大装置及其模拟预失真校正方法
JP6098178B2 (ja) 増幅装置、歪補償装置および歪補償方法
CN210120537U (zh) 一种应用预失真的功放保护装置
US20080002787A1 (en) Method to maintain RF power amplifier linearity in varying load VSWR conditions without isolator
JP6103035B2 (ja) 電力増幅器、故障検出方法
WO2016101627A1 (zh) 提升射频功率放大器dpd性能的方法及装置
US20190349227A1 (en) Systems and methods for cable headend transmission
WO2014161354A1 (zh) 一种Doherty功放的控制方法和装置
Sills et al. Adaptive power amplifier linearization by digital pre-distortion using genetic algorithms
CN202713234U (zh) 宽带自适应射频功率放大装置
GB2527816A (en) Improvements to digital pre-distortion processing
US10305577B2 (en) Multi-stage linearizer
JP2013247501A (ja) 電力増幅装置
KR20100079112A (ko) 디지털 전치 왜곡 전력 증폭기를 사용하는 시간 분할 이중 통신 시스템에서 이득 보상 장치 및 방법
CN106301234B (zh) 一种多尔蒂功放的控制方法和装置

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: 19935357

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: 19935357

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 19935357

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 23.09.2023)

122 Ep: pct application non-entry in european phase

Ref document number: 19935357

Country of ref document: EP

Kind code of ref document: A1