WO2019080566A1 - Power amplifier protection method and device - Google Patents

Power amplifier protection method and device

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Publication number
WO2019080566A1
WO2019080566A1 PCT/CN2018/097581 CN2018097581W WO2019080566A1 WO 2019080566 A1 WO2019080566 A1 WO 2019080566A1 CN 2018097581 W CN2018097581 W CN 2018097581W WO 2019080566 A1 WO2019080566 A1 WO 2019080566A1
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WO
WIPO (PCT)
Prior art keywords
power
signal
power amplifier
threshold
linear region
Prior art date
Application number
PCT/CN2018/097581
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French (fr)
Chinese (zh)
Inventor
葛卫敏
雷文明
唐良建
Original Assignee
京信通信系统（中国）有限公司
京信通信系统（广州）有限公司
京信通信技术(广州)有限公司
天津京信通信系统有限公司
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Application filed by 京信通信系统（中国）有限公司, 京信通信系统（广州）有限公司, 京信通信技术(广州)有限公司, 天津京信通信系统有限公司 filed Critical 京信通信系统（中国）有限公司
Publication of WO2019080566A1 publication Critical patent/WO2019080566A1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a power amplifier protection method and apparatus implemented by an FPGA.
  • the power amplifier module completes the function of powering up the forward transmission signal and outputting it by the antenna, and is a key module of the base station system. If the module has a faulty fault and no signal is output, the power amplifier module is affected. The normal communication of users in the service area has serious consequences. It can be seen that the function of the power amplifier is very important and the cost is high, so the protection of the power amplifier has always been crucial.
  • the inventors have invented many systems for the protection of the power amplifier by detecting the signal power, periodically detecting in order to avoid high power, and turning off the power amplifier once the power is over, but the protection mode of the power amplifier has no slave signal.
  • the overall analysis of the process provides an effective control of the signal power, which not only hinders the normal operation of the entire system, but also reduces the life of the amplifier.
  • some systems only perform power adjustment on the front end section of the power amplifier to protect the power amplifier.
  • the protection mode of the power amplifier is prone to problems due to excessive power adjustment and affecting the performance of the signal itself.
  • the present invention has been made in order to provide a power amplifier protection method and apparatus that overcomes the above problems or at least partially solves the above problems.
  • a power amplifier protection device includes a baseband signal receiving module, a baseband power amplifier protection module, a DAC front power amplifier protection module, and a digital to analog conversion module;
  • the baseband signal receiving module is configured to convert the received optical signal into a baseband digital signal
  • the baseband power amplifier protection module is configured to detect whether a power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and adjust power of the baseband digital signal when a power of the baseband digital signal is greater than the linear region power threshold Within the linear region power threshold;
  • the DAC front power amplifier protection module is configured to detect whether the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold, and when the power of the power amplifier input signal is greater than the linear region power threshold, Adjusting a power of the power amplifier input signal to the linear region power threshold;
  • the digital-to-analog conversion module is configured to convert a digital signal processed by the DAC front power amplifier protection module into an analog signal, and send the analog signal to a power amplifier.
  • the power amplifier protection device further includes a power amplifier control module
  • the baseband signal receiving module is further configured to send a first trigger signal to the power amplifier control module when a clock loss or synchronization of the optical port of the optical signal is transmitted, and the period is a period of a first preset time period, and the period is Monitoring whether the optical port returns to normal, and sending a second trigger signal to the power amplifier control module when the optical port returns to normal;
  • the power amplifier control module is configured to turn off the power amplifier switch when the first trigger signal is received, and turn on the power amplifier switch when the second trigger signal is received.
  • the baseband power amplifier protection module includes a mean power control submodule and a first peak power control submodule;
  • the average power control sub-module is configured to calculate a baseband signal average power of the baseband digital signal for a second preset time length, and detect whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, when the baseband When the signal mean power is greater than the linear region power threshold, adjusting the power of the baseband digital signal to the linear region power threshold;
  • the first peak power control submodule is configured to detect whether a peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier when the baseband signal average power is less than or equal to the linear region power threshold And adjusting a peak power of the baseband digital signal to the first preset peak signal threshold when a peak power of the baseband digital signal is greater than the first preset peak signal threshold.
  • the DAC front power amplifier protection module includes a feedback mean power control submodule and a second peak power control submodule;
  • a feedback average power control sub-module configured to calculate an average power of the input signal of the power amplifier input signal for a third preset time length, and detect whether the average power of the power amplifier input signal is greater than the linear region power threshold, when the power amplifier When the input signal mean is greater than the linear region power threshold, adjusting the power of the power amplifier input signal to the linear region power threshold;
  • the second peak power control submodule is configured to detect, when the average value of the power amplifier input signal is less than or equal to the linear region power threshold, whether a peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier And adjusting a peak power of the power amplifier input signal to the second preset peak signal threshold when a peak power of the power amplifier input signal is greater than the second preset peak signal threshold.
  • the feedback mean power control sub-module is implemented by an automatic gain control circuit.
  • a power amplifier protection method including:
  • the method further includes:
  • the first trigger signal is sent, and the optical port is periodically restored to be normal when the optical port is restored.
  • the second trigger signal is sent;
  • the power amplifier switch is turned off when the first trigger signal is received, and the power amplifier switch is turned on when the second trigger signal is received.
  • the baseband digital signal is The peak power is adjusted to within the first predetermined peak signal threshold.
  • the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold.
  • the power amplifier input signal is detected.
  • the power is adjusted to the linear region power threshold, including:
  • the power amplifier input signal is The peak power is adjusted to within the second predetermined peak signal threshold.
  • an embodiment of the present invention also provides a transmitter including the power amplifier protection device as described above.
  • the power amplifier protection method and device provided by the embodiments of the present invention perform an overall analysis on the signal processing process by controlling the signal power from the input end of the signal and the output end of the signal processing module, thereby maintaining the linearity of the output signal in the power amplifier.
  • the regional power threshold not only the power in the protection system is not damaged during normal operation, but also the protection of the power amplifier, and the sustained performance of the signal is preserved, which increases the reliability of the system.
  • FIG. 1 is a schematic structural diagram of a power amplifier protection device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a power amplifier protection device according to another embodiment of the present invention.
  • FIG. 3 is a flowchart of a power amplifier protection method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a specific implementation of a power amplifier protection method according to another embodiment of the present invention.
  • FIG. 1 is a schematic block diagram showing the structure of a power amplifier protection device according to an embodiment of the present invention.
  • a power amplifier protection apparatus according to an embodiment of the present invention specifically includes a baseband signal receiving module 101, a baseband power amplifier protection module 102, a DAC front power amplifier protection module 103, and a digital to analog conversion module 104, and the baseband signal receiving module 101 and baseband power amplifier protection.
  • the module 102 is sequentially connected to the signal input end of the signal processing module 105 at the front end of the power amplifier.
  • the DAC front power amplifier protection module 103 and the digital-to-analog conversion module 104 are sequentially connected to the signal output end of the signal processing module 105 and the power amplifier 106 to be protected. Between the signal inputs.
  • the signal processing module 105 is part of the power amplifier system and is configured to perform function-related arithmetic processing on the received signals according to the system's own functional requirements.
  • the baseband signal receiving module 101 is configured to convert the received optical signal into a baseband digital signal.
  • the baseband signal receiving module 101 converts the optical signal received from the optical port into a baseband digital signal according to a protocol, and transmits the baseband digital signal to the baseband power amplifier protection module 102.
  • the baseband power amplifier protection module 102 is configured to detect whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and when the power of the baseband digital signal is greater than the linear region power threshold, the power of the baseband digital signal is used. Adjusted to the linear region power threshold, otherwise, no processing.
  • the power region threshold of the power amplifier in the embodiment is specifically an upper power limit allowed by the power amplifier linear region, which is determined in advance according to the power amplifier performance test.
  • the baseband power amplifier protection module 102 maintains the output signal in the linear region of the power amplifier by automatically adjusting the digital signal power at the input end of the signal processing module of the power amplifier front end, thereby protecting the power in the system from being damaged during normal operation.
  • the DAC front power amplifier protection module 103 is configured to detect whether the power of the power amplifier input signal processed by the signal processing module 105 of the power amplifier front end is greater than the linear region power threshold, and when the power of the power amplifier input signal is greater than the linear region power threshold The power of the power amplifier input signal is adjusted to the linear region power threshold, otherwise, no processing is performed.
  • the DAC front power amplifier protection module 103 maintains the output signal in the linear region of the power amplifier by automatically adjusting the digital signal power at the output end of the signal processing module of the power amplifier front end, thereby protecting the power in the system from normal operation. Not damaged.
  • the digital-to-analog conversion module 104 is configured to convert the digital signal processed by the DAC front power amplifier protection module 103 into an analog signal, and send the analog signal to the power amplifier 106 through the radio frequency circuit.
  • the power amplifier protection device ensures the protection of the power amplifier by adjusting the signal power at the input end of the system and the output end of the signal processing module to ensure that the signal is maintained in the linear working area of the power amplifier.
  • the implementation of the present invention preferably builds corresponding modules and systems within the FPGA chip platform, but does not limit the same implementation and system setup in other digital chips.
  • FIG. 2 is a schematic block diagram showing the structure of a power amplifier protection device according to another embodiment of the present invention.
  • the power amplifier protection device further includes a power amplifier control module 107.
  • the baseband signal receiving module 101 is further configured to: when the optical port of the optical signal is transmitted, the clock is lost or lost.
  • the first trigger signal is sent to the power amplifier control module, and the optical port is periodically monitored to be normal after the first preset time length is used.
  • the control module sends a second trigger signal.
  • the power amplifier control module 107 is configured to turn off the power amplifier switch when the first trigger signal is received, and turn on the power amplifier switch when the second trigger signal is received.
  • the baseband signal receiving module 101 receives the optical signal transmitted by the optical fiber and converts it into a digital signal. When the optical fiber appears synchronous or the clock loses lock, there is a trigger mechanism, and the power amplifier control module 107 Turn off the amplifier switch in time to turn off the amplifier. The baseband signal receiving module 101 periodically monitors whether the optical port returns to normal. After waiting for the first preset time length, if the optical fiber works normally, the power amplifier control module 107 turns on the power amplifier, otherwise the power amplifier remains off.
  • the first preset time length is preferably 1 s, and is detected in a cycle of 1 s.
  • the baseband power amplifier protection module 102 specifically includes an average power control submodule and a first peak power control submodule, where:
  • a mean power control sub-module configured to calculate a baseband signal average power of the baseband digital signal for a second preset time length, and detect whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, when the baseband signal average When the power is greater than the linear region power threshold, the power of the baseband digital signal is adjusted to within the linear region power threshold.
  • the second preset time length may be set according to the power amplifier performance and the application scenario, and is preferably 10 ms in this embodiment.
  • the mean power control sub-module compares the average power of the baseband signal every 10 ms with the upper power limit allowed by the power amplifier linear region (the linear region power threshold of the power amplifier), and if the upper limit value is exceeded, The gain is such that the power of the baseband digital signal falls back into the linear region. If the linear region power threshold is not exceeded, the first peak power control sub-module is activated.
  • a first peak power control submodule configured to detect whether a peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier when the baseband signal average power is less than or equal to the linear region power threshold
  • the peak power of the baseband digital signal is adjusted to be within the first preset peak signal threshold.
  • a signal upper limit value allowed by the power amplifier is set as the first preset peak signal threshold. If the power of the baseband digital signal exceeds the upper limit value, the power of the baseband digital signal is returned to the upper limit value. . It can be understood that the first preset peak signal threshold should be less than or equal to the linear region power threshold of the power amplifier.
  • the DAC front power amplifier protection module 103 includes a feedback mean power control submodule and a second peak power control submodule, where:
  • a feedback average power control sub-module configured to calculate an average power of the input signal of the power amplifier input signal for a third preset time length, and detect whether the average power of the power amplifier input signal is greater than the linear region power threshold, when the power amplifier When the input signal mean is greater than the linear region power threshold, the power of the power amplifier input signal is adjusted to the linear region power threshold.
  • the feedback mean power control sub-module is implemented by an automatic gain control circuit, and the automatic gain control circuit adjusts the power gain according to the feedback value of the received power and the self-set value (ie, the linear region power threshold of the power amplifier), and the power amplifier has been adjusted. The power of the input signal is adjusted to within the linear region power threshold. If the linear region power threshold is not exceeded, the second peak power control sub-module is activated.
  • a second peak power control submodule configured to detect, when the average value of the power amplifier input signal is less than or equal to the linear region power threshold, whether a peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier.
  • the peak power of the power amplifier input signal is adjusted to the second preset peak signal threshold.
  • a signal upper limit value allowed by the power amplifier is set as a second preset peak signal threshold. If the peak power of the power amplifier input signal exceeds the upper limit value, the peak power of the power amplifier input signal is backed off to the upper limit. Below the value. It can be understood that the second preset peak signal threshold should be less than or equal to the linear region power threshold of the power amplifier.
  • the power amplifier protection method and device provided by the embodiments of the present invention are a digital power self-adjusting power amplifier protection method.
  • power amplifiers are essential in the field of communications due to their high cost.
  • the FPGA chip is used for digital signal processing to realize power amplifier protection, and there is no redundant external circuit to control, thereby saving cost.
  • the invention mainly adjusts the signal power, supplemented by the forced switching power amplifier method, and can effectively extend the service life of the power amplifier.
  • the invention converts the signal from the receiving optical port into a digital signal based on the architecture of the FPGA chip, and at the same time determines whether the optical port has a clock loss or synchronization, and if the clock loses lock or falls out, the power amplifier switch is turned off. Otherwise, the power amplifier works normally; the baseband signal is subjected to the mean power adjustment and the peak power adjustment. If the threshold is exceeded, the power is adjusted to the linear region of the power amplifier, so that the power is controlled at the beginning of the circuit, which will affect the performance of the signal. To the protection effect, it is also conducive to the subsequent signal processing work.
  • Signal processing after power-adjusted signal; agc circuit power adjustment and peak power adjustment are performed on the processed signal before the DAC, the signal is controlled in the linear region of the power amplifier, and the signal power is simultaneously controlled by the start end and the transmitting end Adjust to ensure that the signal performance is adjusted to the linear area of the amplifier to protect the amplifier from large signal damage. Finally, the digital signal is converted into an analog signal and transmitted to the power amplifier RF circuit.
  • the invention not only protects the power in the system from being damaged during normal operation, but also achieves the protection function of the power amplifier, and also saves the continuous performance of the signal, thereby increasing the reliability of the system.
  • FIG. 3 is a flow chart showing a power amplifier protection method according to an embodiment of the present invention.
  • the power amplifier protection method provided by the embodiment of the present invention specifically includes the following steps:
  • the adjusted baseband digital signal is sent to the signal processing module of the power amplifier front end of the system for signal processing, and then step S203 is performed to Power adjustment is performed on the power amplifier input signal processed by the signal processing module.
  • step S202 is specifically implemented by: calculating a baseband signal average power of the baseband digital signal in a second preset time length, and detecting whether the baseband signal average power is greater than a power amplifier linear region power threshold.
  • a power amplifier linear region power threshold When the baseband signal average power is greater than the linear region power threshold, adjusting the power of the baseband digital signal to the linear region power threshold; otherwise, detecting whether the peak power of the baseband digital signal is greater than the first of the power amplifier Presetting a peak signal threshold, and adjusting a peak power of the baseband digital signal to the first preset peak signal threshold when a peak power of the baseband digital signal is greater than the first preset peak signal threshold.
  • step S203 is specifically implemented by: counting an input signal average power of the power amplifier input signal for a third preset time length, and detecting whether the input signal average power is greater than the linear region power threshold.
  • the average value of the input signal is greater than the linear region power threshold, adjusting the power of the power amplifier input signal to the linear region power threshold; otherwise, detecting whether the peak power of the power amplifier input signal is greater than the second preamp of the power amplifier And setting a peak signal threshold, and adjusting a peak power of the power amplifier input signal to the second preset peak signal threshold when a peak power of the power amplifier input signal is greater than the second preset peak signal threshold.
  • the power amplifier protection method provided by the embodiment of the invention adopts the adjustment of the signal power at the input end of the system and the output end of the signal processing module to ensure that the signal is maintained in the linear working area of the power amplifier to realize the protection of the power amplifier.
  • the first trigger signal is sent, and the optical port is periodically restored to be normal when the optical port is restored.
  • the second trigger signal is sent;
  • the power amplifier switch is turned off when the first trigger signal is received, and the power amplifier switch is turned on when the second trigger signal is received.
  • FIG. 4 is a specific flowchart of a power self-adjusting power amplifier protection method according to an embodiment of the present invention. As shown in FIG. 4, the power amplifier protection method in this embodiment specifically includes the following steps:
  • Step 301 the system is started, and each module enters a normal operating state
  • Step 302 The baseband signal receiving module is responsible for receiving the signal from the optical port and converting it into a digital signal, and at step 303, determining whether the optical port has a clock loss or synchronization during the receiving process, if there is a clock loss or synchronization, step 304 Turn off the power amplifier switch, otherwise the power amplifier works normally, and enter step 305 baseband signal power processing;
  • Step 306 determining whether the baseband average power exceeds the threshold. If the threshold is exceeded, the process proceeds to step 307 to perform baseband signal average power adjustment. Otherwise, the process proceeds to step 308 to determine whether the peak power exceeds the threshold. If the threshold is exceeded, the process proceeds to the step. 309 performs baseband signal peak power adjustment, otherwise it is not processed;
  • Step 310 is signal processing of system functionality
  • Step 311 is to process the power of the DAC signal
  • step 312 is to determine whether the power of the power amplifier input signal before the DAC exceeds the threshold. If the threshold is exceeded, the process proceeds to step 313 to adjust the power of the power input signal. Otherwise, the process is not processed. 314: determining whether the peak power of the power amplifier input signal exceeds a threshold, if the threshold is exceeded, proceed to step 315 to perform peak power adjustment of the power amplifier input signal, otherwise no processing;
  • step 316 sends the adjusted power amplifier input signal to the RF power amplifier through digital-to-analog conversion.
  • the power amplifier protection method and device provided by the embodiments of the present invention perform an overall analysis on the signal processing process by controlling the signal power from the input end of the signal and the output end of the signal processing module, thereby maintaining the linearity of the output signal in the power amplifier.
  • the regional power threshold not only the power in the protection system is not damaged during normal operation, but also the protection of the power amplifier, and the sustained performance of the signal is preserved, which increases the reliability of the system.
  • an embodiment of the present invention further provides a transmitter, where the transmitter includes the power amplifier protection device according to any of the above embodiments.
  • the transmitter provided by the embodiment of the present invention is specifically described by taking a power amplifier protection device as shown in FIG. 1 as an example.
  • the transmitter provided by the embodiment of the present invention includes the power amplifier protection device, the power amplifier module and the signal processing module of the front end of the power amplifier module, and the baseband signal receiving module 101 and the baseband power amplifier protection module 102 in the power amplifier protection device are sequentially connected to the signal.
  • the DAC front power amplifier protection module 103 and the digital to analog conversion module 104 are sequentially connected to the signal processing module.
  • the transmitter provided by the embodiment of the invention uses the FPGA chip to perform digital signal processing to realize power amplifier protection. There is no redundant external circuit to control, no additional cost is needed, and no manual intervention is required, and the software configuration is convenient. Moreover, by performing an overall analysis of the signal processing process, the output signal is kept within the linear region power threshold of the power amplifier, which not only facilitates the operation of the signal in the linear region of the power amplifier, but also ensures the performance of the signal.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Provided by an embodiment of the present invention are a power amplifier protection method and device, the device comprising: a baseband signal receiving module, which converts a received optical signal into a baseband digital signal; a baseband power amplifier protection module, which detects whether the power of the baseband digital signal is greater than a power threshold of a linear region of a power amplifier and which adjusts the power of the baseband digital signal to be within the power threshold of the linear region when the power of the baseband digital signal is greater than the power threshold of the linear region; a digital-to-analog converter (DAC) front power amplifier protection module, which detects whether the power of a power amplifier input signal that has been processed by means of a signal processing module of a power amplifier front end is greater than the power threshold of the linear region and which adjusts the power of the power amplifier input signal to be within the power threshold of the linear region when the power of the power amplifier input signal is greater than the power threshold of the linear region; a digital-to-analog conversion module, which converts a processed digital signal into an analog signal and which sends the same to the power amplifier. The present invention may effectively control signal power so as to achieve a protective effect for a power amplifier and increase the reliability of the system.

Description

一种功放保护方法及装置Power amplifier protection method and device 技术领域Technical field
本发明涉及移动通信技术领域，尤其涉及一种由FPGA实现的功放保护方法及装置。The present invention relates to the field of mobile communication technologies, and in particular, to a power amplifier protection method and apparatus implemented by an FPGA.
背景技术Background technique
现有的移动通信系统中，功放模块完成将前向发射信号进行功率放大后由天线输出的功能，是基站系统的关键模块，如果该模块出现损坏故障导致没有信号输出，则影响该功放模块覆盖服务区用户的正常通信，后果非常严重。可见，功放的作用非常重要，且成本较高，所以对于功放的保护一直是至关重要的。In the existing mobile communication system, the power amplifier module completes the function of powering up the forward transmission signal and outputting it by the antenna, and is a key module of the base station system. If the module has a faulty fault and no signal is output, the power amplifier module is affected. The normal communication of users in the service area has serious consequences. It can be seen that the function of the power amplifier is very important and the cost is high, so the protection of the power amplifier has always been crucial.
在实现本发明过程中发明人发明现有很多系统对于功放的保护是通过检测信号功率，为了回避大功率而周期检测，一旦出现过功率则关闭功放，但是这种功放的保护方式并没有从信号处理过程进行整体分析而对信号功率进行一个有效控制，这样不仅对整个系统的正常运作有阻碍，而且也会减少功放的使用寿命。此外，现有技术中，还有一些系统只在功放前端段进行了功率调节来保护功放，这种功放的保护方式容易出现由于功率调整幅度过大，影响信号本身的性能的问题。In the process of implementing the present invention, the inventors have invented many systems for the protection of the power amplifier by detecting the signal power, periodically detecting in order to avoid high power, and turning off the power amplifier once the power is over, but the protection mode of the power amplifier has no slave signal. The overall analysis of the process provides an effective control of the signal power, which not only hinders the normal operation of the entire system, but also reduces the life of the amplifier. In addition, in the prior art, some systems only perform power adjustment on the front end section of the power amplifier to protect the power amplifier. The protection mode of the power amplifier is prone to problems due to excessive power adjustment and affecting the performance of the signal itself.
发明内容Summary of the invention
鉴于上述问题，提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问题的功放保护方法及装置。In view of the above problems, the present invention has been made in order to provide a power amplifier protection method and apparatus that overcomes the above problems or at least partially solves the above problems.
本发明的一个方面，提供了一种功放保护装置，包括基带信号接收模块、基带功放保护模块、DAC前功放保护模块和数模转换模块；According to an aspect of the present invention, a power amplifier protection device includes a baseband signal receiving module, a baseband power amplifier protection module, a DAC front power amplifier protection module, and a digital to analog conversion module;
所述基带信号接收模块，用于将接收到的光信号转换为基带数字信号；The baseband signal receiving module is configured to convert the received optical signal into a baseband digital signal;
所述基带功放保护模块，用于检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；The baseband power amplifier protection module is configured to detect whether a power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and adjust power of the baseband digital signal when a power of the baseband digital signal is greater than the linear region power threshold Within the linear region power threshold;
所述DAC前功放保护模块，用于检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；The DAC front power amplifier protection module is configured to detect whether the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold, and when the power of the power amplifier input signal is greater than the linear region power threshold, Adjusting a power of the power amplifier input signal to the linear region power threshold;
所述数模转换模块，用于将所述DAC前功放保护模块处理后的数字信号转换为模拟信号，并将所述模拟信号发送到功放。The digital-to-analog conversion module is configured to convert a digital signal processed by the DAC front power amplifier protection module into an analog signal, and send the analog signal to a power amplifier.
其中，所述功放保护装置还包括功放控制模块；Wherein, the power amplifier protection device further includes a power amplifier control module;
所述基带信号接收模块，还用于当传输光信号的光口发生时钟失锁或掉同步时，向所述功放控制模块发送第一触发信号，并以第一预设时间长度为周期，周期性监测所述光口是否恢复正常，当所述光口恢复正常时，向所述功放控制模块发送第二触发信号；The baseband signal receiving module is further configured to send a first trigger signal to the power amplifier control module when a clock loss or synchronization of the optical port of the optical signal is transmitted, and the period is a period of a first preset time period, and the period is Monitoring whether the optical port returns to normal, and sending a second trigger signal to the power amplifier control module when the optical port returns to normal;
所述功放控制模块，用于在接收到所述第一触发信号时关闭功放开关，在收到所述第二触发信号时开启功放开关。The power amplifier control module is configured to turn off the power amplifier switch when the first trigger signal is received, and turn on the power amplifier switch when the second trigger signal is received.
其中，所述基带功放保护模块包括均值功率控制子模块和第一峰值功率控制子模块；The baseband power amplifier protection module includes a mean power control submodule and a first peak power control submodule;
所述均值功率控制子模块，用于统计所述基带数字信号在第二预设时间长度内的基带信号均值功率，检测所述基带信号均值功率是否大于功放的线性区域功率阈值，当所述基带信号均值功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；The average power control sub-module is configured to calculate a baseband signal average power of the baseband digital signal for a second preset time length, and detect whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, when the baseband When the signal mean power is greater than the linear region power threshold, adjusting the power of the baseband digital signal to the linear region power threshold;
所述第一峰值功率控制子模块，用于当所述基带信号均值功率小于或等于所述线性区域功率阈值时，检测所述基带数字信号的峰值功率是否大于功放的第一预设峰值信号阈值，当所述基带数字信号的峰值功率大于所述第一预设峰值信号阈值时，将所述基带数字信号的峰值功率调节到所述第一预设峰值信号 阈值内。The first peak power control submodule is configured to detect whether a peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier when the baseband signal average power is less than or equal to the linear region power threshold And adjusting a peak power of the baseband digital signal to the first preset peak signal threshold when a peak power of the baseband digital signal is greater than the first preset peak signal threshold.
其中，所述DAC前功放保护模块包括反馈均值功率控制子模块和第二峰值功率控制子模块；The DAC front power amplifier protection module includes a feedback mean power control submodule and a second peak power control submodule;
反馈均值功率控制子模块，用于统计所述功放输入信号在第三预设时间长度内的输入信号均值功率，检测所述功放输入信号均值功率是否大于所述线性区域功率阈值，当所述功放输入信号均值大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；a feedback average power control sub-module, configured to calculate an average power of the input signal of the power amplifier input signal for a third preset time length, and detect whether the average power of the power amplifier input signal is greater than the linear region power threshold, when the power amplifier When the input signal mean is greater than the linear region power threshold, adjusting the power of the power amplifier input signal to the linear region power threshold;
所述第二峰值功率控制子模块，用于当所述功放输入信号均值小于或等于所述线性区域功率阈值时，检测所述功放输入信号的峰值功率是否大于功放的第二预设峰值信号阈值，当所述功放输入信号的峰值功率大于所述第二预设峰值信号阈值时，将所述功放输入信号的峰值功率调节到所述第二预设峰值信号阈值内。The second peak power control submodule is configured to detect, when the average value of the power amplifier input signal is less than or equal to the linear region power threshold, whether a peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier And adjusting a peak power of the power amplifier input signal to the second preset peak signal threshold when a peak power of the power amplifier input signal is greater than the second preset peak signal threshold.
其中，上述反馈均值功率控制子模块采用自动增益控制电路实现。Wherein, the feedback mean power control sub-module is implemented by an automatic gain control circuit.
本发明的另一个方面，提供了一种功放保护方法，包括:In another aspect of the present invention, a power amplifier protection method is provided, including:
将接收到的光信号转换为基带数字信号；Converting the received optical signal into a baseband digital signal;
检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；Detecting whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and adjusting the power of the baseband digital signal to the linear region power threshold when the power of the baseband digital signal is greater than the linear region power threshold;
检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；Detecting whether the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold. When the power of the power amplifier input signal is greater than the linear region power threshold, adjusting the power of the power amplifier input signal to Within the linear region power threshold;
将所述DAC前功放保护模块处理后的数字信号转换为模拟信号，并将所述模拟信号发送到功放。Converting the digital signal processed by the DAC preamplifier protection module into an analog signal, and transmitting the analog signal to the power amplifier.
其中，所述方法还包括：The method further includes:
当传输光信号的光口发生时钟失锁或掉同步时，发送第一触发信号，并以第一预设时间长度为周期，周期性监测所述光口是否恢复正常，当所述光口恢 复正常时，发送第二触发信号；When the optical port of the optical signal is lost or lost, the first trigger signal is sent, and the optical port is periodically restored to be normal when the optical port is restored. When normal, the second trigger signal is sent;
在接收到所述第一触发信号时关闭功放开关，在收到所述第二触发信号时开启功放开关。The power amplifier switch is turned off when the first trigger signal is received, and the power amplifier switch is turned on when the second trigger signal is received.
其中，所述检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内，包括：The detecting whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and adjusting the power of the baseband digital signal to the linear region when the power of the baseband digital signal is greater than the linear region power threshold Within the power threshold, including:
统计所述基带数字信号在第二预设时间长度内的基带信号均值功率，检测所述基带信号均值功率是否大于功放的线性区域功率阈值，当所述基带信号均值功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；And calculating a baseband signal average power of the baseband digital signal in a second preset time length, detecting whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, and when the baseband signal average power is greater than the linear region power threshold Adjusting the power of the baseband digital signal to the linear region power threshold;
否则，检测所述基带数字信号的峰值功率是否大于功放的第一预设峰值信号阈值，当所述基带数字信号的峰值功率大于所述第一预设峰值信号阈值时，将所述基带数字信号的峰值功率调节到所述第一预设峰值信号阈值内。Otherwise, detecting whether the peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier, and when the peak power of the baseband digital signal is greater than the first preset peak signal threshold, the baseband digital signal is The peak power is adjusted to within the first predetermined peak signal threshold.
其中，所述检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内，包括：The power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold. When the power of the power amplifier input signal is greater than the linear region power threshold, the power amplifier input signal is detected. The power is adjusted to the linear region power threshold, including:
统计所述功放输入信号在第三预设时间长度内的输入信号均值功率，检测所述输入信号均值功率是否大于所述线性区域功率阈值，当所述输入信号均值大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；And calculating an input signal average power of the power amplifier input signal for a third preset time length, detecting whether the input signal average power is greater than the linear region power threshold, when the input signal mean is greater than the linear region power threshold And adjusting a power of the power amplifier input signal to the linear region power threshold;
否则，检测所述功放输入信号的峰值功率是否大于功放的第二预设峰值信号阈值，当所述功放输入信号的峰值功率大于所述第二预设峰值信号阈值时，将所述功放输入信号的峰值功率调节到所述第二预设峰值信号阈值内。Otherwise, detecting whether the peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier, and when the peak power of the power amplifier input signal is greater than the second preset peak signal threshold, the power amplifier input signal is The peak power is adjusted to within the second predetermined peak signal threshold.
此外，本发明实施例还提供了一种发射机，所述发射机包括如上所述的功放保护装置。In addition, an embodiment of the present invention also provides a transmitter including the power amplifier protection device as described above.
本发明实施例提供的功放保护方法及装置，通过从信号的进入端和信号处理模块的输出端对信号功率进行一个有效控制，对信号处理过程进行整体分析，从而来保持输出信号在功放的线性区域功率阈值内，不仅保护系统中的功放在正常工作中不被损坏，以达到功放保护作用，而且也使得信号的持续性能得以保存，增加了系统可靠性。The power amplifier protection method and device provided by the embodiments of the present invention perform an overall analysis on the signal processing process by controlling the signal power from the input end of the signal and the output end of the signal processing module, thereby maintaining the linearity of the output signal in the power amplifier. Within the regional power threshold, not only the power in the protection system is not damaged during normal operation, but also the protection of the power amplifier, and the sustained performance of the signal is preserved, which increases the reliability of the system.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. Specific embodiments of the invention are set forth below.
附图说明DRAWINGS
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：Various other advantages and benefits will become apparent to those skilled in the art from a The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. In the drawing:
图1为本发明实施例的一种功放保护装置的结构示意图；1 is a schematic structural diagram of a power amplifier protection device according to an embodiment of the present invention;
图2为本发明另一实施例的一种功放保护装置的结构示意图；2 is a schematic structural diagram of a power amplifier protection device according to another embodiment of the present invention;
图3为本发明实施例的一种功放保护方法的流程图；3 is a flowchart of a power amplifier protection method according to an embodiment of the present invention;
图4为本发明另一实施例的一种功放保护方法的具体实现流程图。FIG. 4 is a flowchart of a specific implementation of a power amplifier protection method according to another embodiment of the present invention.
具体实施方式Detailed ways
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本发明所属领域中的普通技术人员的一般理 解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非被特定定义，否则不会用理想化或过于正式的含义来解释。Those skilled in the art will appreciate that all terms (including technical and scientific terms) used herein have the same meaning as the ordinary meanings of ordinary skill in the art to which the invention pertains, unless otherwise defined. It should also be understood that terms such as those defined in a general dictionary should be understood to have meaning consistent with the meaning in the context of the prior art, and will not be idealized or overly formal unless specifically defined. To explain.
为了解决现有技术中，由于没有从信号处理过程进行整体分析而对信号功率进行一个有效控制，而对整个系统的正常运作造成阻碍，减少功放的使用寿命的问题，本发明实施例提供了一种能够实现功率自调节的功放保护方法及装置。图1示意性示出了本发明一个实施例的功放保护装置的结构示意图。参照图1，本发明实施例的功放保护装置具体包括基带信号接收模块101、基带功放保护模块102、DAC前功放保护模块103和数模转换模块104，所述基带信号接收模块101和基带功放保护模块102依次连接在功放前端的信号处理模块105的信号输入端，所述DAC前功放保护模块103和数模转换模块104依次连接在所述信号处理模块105的信号输出端和待保护的功放106的信号输入端之间。信号处理模块105属于功放系统的一部分，用于根据系统自身功能需要，可对接收到的信号做功能相关的运算处理。In order to solve the problem in the prior art, since the signal power is not effectively controlled from the overall processing of the signal processing process, and the normal operation of the whole system is hindered, and the service life of the power amplifier is reduced, the embodiment of the present invention provides a A power amplifier protection method and device capable of realizing power self-adjustment. FIG. 1 is a schematic block diagram showing the structure of a power amplifier protection device according to an embodiment of the present invention. Referring to FIG. 1 , a power amplifier protection apparatus according to an embodiment of the present invention specifically includes a baseband signal receiving module 101, a baseband power amplifier protection module 102, a DAC front power amplifier protection module 103, and a digital to analog conversion module 104, and the baseband signal receiving module 101 and baseband power amplifier protection. The module 102 is sequentially connected to the signal input end of the signal processing module 105 at the front end of the power amplifier. The DAC front power amplifier protection module 103 and the digital-to-analog conversion module 104 are sequentially connected to the signal output end of the signal processing module 105 and the power amplifier 106 to be protected. Between the signal inputs. The signal processing module 105 is part of the power amplifier system and is configured to perform function-related arithmetic processing on the received signals according to the system's own functional requirements.
其中，所述基带信号接收模块101，用于将接收到的光信号转换为基带数字信号。本实施例中，基带信号接收模块101将从光口接收过来的光信号按照协议转换为基带数字信号，将该基带数字信号发送到基带功放保护模块102。The baseband signal receiving module 101 is configured to convert the received optical signal into a baseband digital signal. In this embodiment, the baseband signal receiving module 101 converts the optical signal received from the optical port into a baseband digital signal according to a protocol, and transmits the baseband digital signal to the baseband power amplifier protection module 102.
所述基带功放保护模块102，用于检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内，否则，不做处理。其中，本实施例中功放的线性区域功率阈值具体为功放线性区允许的功率上限，是预先根据功放性能测试确定的。基带功放保护模块102通过对功放前端的信号处理模块输入端的数字信号功率的自动调节，来保持输出信号在功放的线性区域内，进而保护系统中的功放在正常工作中不被损坏。The baseband power amplifier protection module 102 is configured to detect whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and when the power of the baseband digital signal is greater than the linear region power threshold, the power of the baseband digital signal is used. Adjusted to the linear region power threshold, otherwise, no processing. The power region threshold of the power amplifier in the embodiment is specifically an upper power limit allowed by the power amplifier linear region, which is determined in advance according to the power amplifier performance test. The baseband power amplifier protection module 102 maintains the output signal in the linear region of the power amplifier by automatically adjusting the digital signal power at the input end of the signal processing module of the power amplifier front end, thereby protecting the power in the system from being damaged during normal operation.
所述DAC前功放保护模块103，用于检测经过功放前端的信号处理模块105处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输 入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内，否则，不做处理。本发明实施例中，DAC前功放保护模块103通过对功放前端的信号处理模块输出端的数字信号功率的自动调节，来保持输出信号在功放的线性区域内，进而保护系统中的功放在正常工作中不被损坏。The DAC front power amplifier protection module 103 is configured to detect whether the power of the power amplifier input signal processed by the signal processing module 105 of the power amplifier front end is greater than the linear region power threshold, and when the power of the power amplifier input signal is greater than the linear region power threshold The power of the power amplifier input signal is adjusted to the linear region power threshold, otherwise, no processing is performed. In the embodiment of the present invention, the DAC front power amplifier protection module 103 maintains the output signal in the linear region of the power amplifier by automatically adjusting the digital signal power at the output end of the signal processing module of the power amplifier front end, thereby protecting the power in the system from normal operation. Not damaged.
所述数模转换模块104，用于将所述DAC前功放保护模块103处理后的数字信号转换为模拟信号，并将所述模拟信号通过射频电路发送到功放106。The digital-to-analog conversion module 104 is configured to convert the digital signal processed by the DAC front power amplifier protection module 103 into an analog signal, and send the analog signal to the power amplifier 106 through the radio frequency circuit.
本发明实施例提供的功放保护装置通过在系统输入端和信号处理模块的输出端分别对信号功率做调整，来确保信号维持在功放的线性工作区域内，来实现对功放的保护。本发明实施优选在FPGA芯片平台内搭建相应模块和系统，但不限制在其他数字芯片内做同样的实施和系统搭建。The power amplifier protection device provided by the embodiment of the invention ensures the protection of the power amplifier by adjusting the signal power at the input end of the system and the output end of the signal processing module to ensure that the signal is maintained in the linear working area of the power amplifier. The implementation of the present invention preferably builds corresponding modules and systems within the FPGA chip platform, but does not limit the same implementation and system setup in other digital chips.
图2示意性示出了本发明另一个实施例的功放保护装置的结构示意图。参照图2，在本发明实施例中，所述功放保护装置还包括功放控制模块107；进一步地，所述基带信号接收模块101，还用于当传输光信号的光口发生时钟失锁或掉同步时，向所述功放控制模块发送第一触发信号，并以第一预设时间长度为周期，周期性监测所述光口是否恢复正常，当所述光口恢复正常时，向所述功放控制模块发送第二触发信号。相应的，所述功放控制模块107，用于在接收到所述第一触发信号时关闭功放开关，在收到所述第二触发信号时开启功放开关。在本发明实施例中，基带信号接收模块101接收的是光纤传输来的光信号，并将其转化为数字信号，在光纤出现掉同步或者时钟失锁时，会有触发机制，功放控制模块107及时关闭功放开关，使得功放处于关闭状态。基带信号接收模块101周期性监测所述光口是否恢复正常，等待第一预设时间长度后，如果光纤工作正常，功放控制模块107开启功放，否则功放仍然保持关闭状态。其中，第一预设时间长度优选为1s，并以1s时间循环检测。FIG. 2 is a schematic block diagram showing the structure of a power amplifier protection device according to another embodiment of the present invention. Referring to FIG. 2, in the embodiment of the present invention, the power amplifier protection device further includes a power amplifier control module 107. Further, the baseband signal receiving module 101 is further configured to: when the optical port of the optical signal is transmitted, the clock is lost or lost. During synchronization, the first trigger signal is sent to the power amplifier control module, and the optical port is periodically monitored to be normal after the first preset time length is used. When the optical port returns to normal, the power amplifier is turned to the power amplifier. The control module sends a second trigger signal. Correspondingly, the power amplifier control module 107 is configured to turn off the power amplifier switch when the first trigger signal is received, and turn on the power amplifier switch when the second trigger signal is received. In the embodiment of the present invention, the baseband signal receiving module 101 receives the optical signal transmitted by the optical fiber and converts it into a digital signal. When the optical fiber appears synchronous or the clock loses lock, there is a trigger mechanism, and the power amplifier control module 107 Turn off the amplifier switch in time to turn off the amplifier. The baseband signal receiving module 101 periodically monitors whether the optical port returns to normal. After waiting for the first preset time length, if the optical fiber works normally, the power amplifier control module 107 turns on the power amplifier, otherwise the power amplifier remains off. The first preset time length is preferably 1 s, and is detected in a cycle of 1 s.
在本发明的一个具体实施例中，所述基带功放保护模块102具体包括均值功率控制子模块和第一峰值功率控制子模块，其中：In a specific embodiment of the present invention, the baseband power amplifier protection module 102 specifically includes an average power control submodule and a first peak power control submodule, where:
均值功率控制子模块，用于统计所述基带数字信号在第二预设时间长度内的基带信号均值功率，检测所述基带信号均值功率是否大于功放的线性区域功率阈值，当所述基带信号均值功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内。其中，第二预设时间长度可根据功放性能和应用场景进行设置，本实施例中优选为10ms。具体的，所述的均值功率控制子模块，统计基带信号在每10ms的均值功率，与功放线性区允许的功率上限(功放的线性区域功率阈值)做比较，如果超出上限值，则通过降低增益来使得基带数字信号的功率回退到线性区域内。如果没有超出线性区域功率阈值，则启动第一峰值功率控制子模块。a mean power control sub-module, configured to calculate a baseband signal average power of the baseband digital signal for a second preset time length, and detect whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, when the baseband signal average When the power is greater than the linear region power threshold, the power of the baseband digital signal is adjusted to within the linear region power threshold. The second preset time length may be set according to the power amplifier performance and the application scenario, and is preferably 10 ms in this embodiment. Specifically, the mean power control sub-module compares the average power of the baseband signal every 10 ms with the upper power limit allowed by the power amplifier linear region (the linear region power threshold of the power amplifier), and if the upper limit value is exceeded, The gain is such that the power of the baseband digital signal falls back into the linear region. If the linear region power threshold is not exceeded, the first peak power control sub-module is activated.
第一峰值功率控制子模块，用于当所述基带信号均值功率小于或等于所述线性区域功率阈值时，检测所述基带数字信号的峰值功率是否大于功放的第一预设峰值信号阈值，当所述基带数字信号的峰值功率大于所述第一预设峰值信号阈值时，将所述基带数字信号的峰值功率调节到所述第一预设峰值信号阈值内。本实施例中，设定一个功放允许的信号上限值作为第一预设峰值信号阈值，如果基带数字信号的功率超出这个上限值，则将基带数字信号的功率回退到上限值以下。可理解的是，所述第一预设峰值信号阈值应该小于或等于功放的线性区域功率阈值。a first peak power control submodule, configured to detect whether a peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier when the baseband signal average power is less than or equal to the linear region power threshold When the peak power of the baseband digital signal is greater than the first preset peak signal threshold, the peak power of the baseband digital signal is adjusted to be within the first preset peak signal threshold. In this embodiment, a signal upper limit value allowed by the power amplifier is set as the first preset peak signal threshold. If the power of the baseband digital signal exceeds the upper limit value, the power of the baseband digital signal is returned to the upper limit value. . It can be understood that the first preset peak signal threshold should be less than or equal to the linear region power threshold of the power amplifier.
在本发明的一个具体实施例中，所述DAC前功放保护模块103包括反馈均值功率控制子模块和第二峰值功率控制子模块，其中：In a specific embodiment of the present invention, the DAC front power amplifier protection module 103 includes a feedback mean power control submodule and a second peak power control submodule, where:
反馈均值功率控制子模块，用于统计所述功放输入信号在第三预设时间长度内的输入信号均值功率，检测所述功放输入信号均值功率是否大于所述线性区域功率阈值，当所述功放输入信号均值大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内。具体的，上述反馈均值功率控制子模块采用自动增益控制电路实现，自动增益控制电路根据接收功率的反馈值与自身设定值(即功放的线性区域功率阈值)比较来调整功率增益，已将功放输入信号的功率调节到所述线性区域功率阈值内。如果没有超出线性 区域功率阈值，则启动第二峰值功率控制子模块。a feedback average power control sub-module, configured to calculate an average power of the input signal of the power amplifier input signal for a third preset time length, and detect whether the average power of the power amplifier input signal is greater than the linear region power threshold, when the power amplifier When the input signal mean is greater than the linear region power threshold, the power of the power amplifier input signal is adjusted to the linear region power threshold. Specifically, the feedback mean power control sub-module is implemented by an automatic gain control circuit, and the automatic gain control circuit adjusts the power gain according to the feedback value of the received power and the self-set value (ie, the linear region power threshold of the power amplifier), and the power amplifier has been adjusted. The power of the input signal is adjusted to within the linear region power threshold. If the linear region power threshold is not exceeded, the second peak power control sub-module is activated.
第二峰值功率控制子模块，用于当所述功放输入信号均值小于或等于所述线性区域功率阈值时，检测所述功放输入信号的峰值功率是否大于功放的第二预设峰值信号阈值，当所述功放输入信号的峰值功率大于所述第二预设峰值信号阈值时，将所述功放输入信号的峰值功率调节到所述第二预设峰值信号阈值内。本实施例中，设定一个功放允许的信号上限值作为第二预设峰值信号阈值，如果功放输入信号的峰值功率超出这个上限值，则将功放输入信号的峰值功率回退到上限值以下。可理解的是，所述第二预设峰值信号阈值应该小于或等于功放的线性区域功率阈值。a second peak power control submodule, configured to detect, when the average value of the power amplifier input signal is less than or equal to the linear region power threshold, whether a peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier When the peak power of the power amplifier input signal is greater than the second preset peak signal threshold, the peak power of the power amplifier input signal is adjusted to the second preset peak signal threshold. In this embodiment, a signal upper limit value allowed by the power amplifier is set as a second preset peak signal threshold. If the peak power of the power amplifier input signal exceeds the upper limit value, the peak power of the power amplifier input signal is backed off to the upper limit. Below the value. It can be understood that the second preset peak signal threshold should be less than or equal to the linear region power threshold of the power amplifier.
本发明实施例提供的功放保护方法及装置，是一种数字功率自调节的功放保护方法。在通信系统中，特别是基站子系统中，功放由于成本较高，在通信领域内的作用是必不可少的。本发明实施例中，采用FPGA芯片做数字信号处理工作，以实现功放保护，没有多余的外部电路再去控制，节省成本。本发明以调节信号功率为主，以强行开关功放方法为辅，可以有效延长功放的使用寿命。本发明在FPGA芯片的架构基础上，将接收光口过来的信号，转换为数字信号，同时判断光口是否有时钟失锁或者掉同步，如果有时钟失锁或者掉同步，将功放开关关闭，否则功放正常运作；将基带信号进行均值功率调整和峰值功率调整，如有超出门限，则将功率调整到功放的线性区域内，这样在电路的起始端对功率进行控制，会对信号的性能起到保护作用，也有利于之后的信号处理工作。功率调整后的信号进行的信号处理；在DAC前将处理后的信号进行agc电路功率调整和峰值功率调整，将信号控制在功放的线性区域内，通过起始端和发送端同时对信号功率进行控制调整，以确保信号性能的前提下将信号调整到功放的线性区域内，以保护功放不被大信号损坏。最后将数字信号转换为模拟信号传输给功放射频电路。本发明不仅保护系统中的功放在正常工作中不被损坏，以达到功放保护作用，而且也使得信号的持续性能得以保存，增加了系统可靠性。The power amplifier protection method and device provided by the embodiments of the present invention are a digital power self-adjusting power amplifier protection method. In communication systems, especially in base station subsystems, power amplifiers are essential in the field of communications due to their high cost. In the embodiment of the present invention, the FPGA chip is used for digital signal processing to realize power amplifier protection, and there is no redundant external circuit to control, thereby saving cost. The invention mainly adjusts the signal power, supplemented by the forced switching power amplifier method, and can effectively extend the service life of the power amplifier. The invention converts the signal from the receiving optical port into a digital signal based on the architecture of the FPGA chip, and at the same time determines whether the optical port has a clock loss or synchronization, and if the clock loses lock or falls out, the power amplifier switch is turned off. Otherwise, the power amplifier works normally; the baseband signal is subjected to the mean power adjustment and the peak power adjustment. If the threshold is exceeded, the power is adjusted to the linear region of the power amplifier, so that the power is controlled at the beginning of the circuit, which will affect the performance of the signal. To the protection effect, it is also conducive to the subsequent signal processing work. Signal processing after power-adjusted signal; agc circuit power adjustment and peak power adjustment are performed on the processed signal before the DAC, the signal is controlled in the linear region of the power amplifier, and the signal power is simultaneously controlled by the start end and the transmitting end Adjust to ensure that the signal performance is adjusted to the linear area of the amplifier to protect the amplifier from large signal damage. Finally, the digital signal is converted into an analog signal and transmitted to the power amplifier RF circuit. The invention not only protects the power in the system from being damaged during normal operation, but also achieves the protection function of the power amplifier, and also saves the continuous performance of the signal, thereby increasing the reliability of the system.
图3示出了本发明实施例的一种功放保护方法的流程图。参见图3，本发明实施例提供的功放保护方法具体包括以下步骤：FIG. 3 is a flow chart showing a power amplifier protection method according to an embodiment of the present invention. Referring to FIG. 3, the power amplifier protection method provided by the embodiment of the present invention specifically includes the following steps:
S201、将接收到的光信号转换为基带数字信号。S201. Convert the received optical signal into a baseband digital signal.
S202、检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内。S202. Detect whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier. When the power of the baseband digital signal is greater than the linear region power threshold, adjust the power of the baseband digital signal to the linear region power threshold. Inside.
在实际应用中，在将基带数字信号的功率调节到所述线性区域功率阈值内之后，将调整后的基带数字信号发送到系统中功放前端的信号处理模块进行信号处理，然后执行步骤S203，以对信号处理模块处理后的功放输入信号进行功率调整。In a practical application, after adjusting the power of the baseband digital signal to the linear region power threshold, the adjusted baseband digital signal is sent to the signal processing module of the power amplifier front end of the system for signal processing, and then step S203 is performed to Power adjustment is performed on the power amplifier input signal processed by the signal processing module.
本实施例中，步骤S202具体通过以下步骤实现：统计所述基带数字信号在第二预设时间长度内的基带信号均值功率，检测所述基带信号均值功率是否大于功放的线性区域功率阈值，当所述基带信号均值功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；否则，检测所述基带数字信号的峰值功率是否大于功放的第一预设峰值信号阈值，当所述基带数字信号的峰值功率大于所述第一预设峰值信号阈值时，将所述基带数字信号的峰值功率调节到所述第一预设峰值信号阈值内。In this embodiment, step S202 is specifically implemented by: calculating a baseband signal average power of the baseband digital signal in a second preset time length, and detecting whether the baseband signal average power is greater than a power amplifier linear region power threshold. When the baseband signal average power is greater than the linear region power threshold, adjusting the power of the baseband digital signal to the linear region power threshold; otherwise, detecting whether the peak power of the baseband digital signal is greater than the first of the power amplifier Presetting a peak signal threshold, and adjusting a peak power of the baseband digital signal to the first preset peak signal threshold when a peak power of the baseband digital signal is greater than the first preset peak signal threshold.
S203、检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内。S203. Detect whether the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold. When the power of the power amplifier input signal is greater than the linear region power threshold, the power of the power amplifier input signal is used. Adjusted to the linear region power threshold.
本实施例中，步骤S203具体通过以下步骤实现：统计所述功放输入信号在第三预设时间长度内的输入信号均值功率，检测所述输入信号均值功率是否大于所述线性区域功率阈值，当所述输入信号均值大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；否则，检测所述功放输入信号的峰值功率是否大于功放的第二预设峰值信号阈值，当所述功放输入信号的峰值功率大于所述第二预设峰值信号阈值时，将所述功放输入 信号的峰值功率调节到所述第二预设峰值信号阈值内。In this embodiment, step S203 is specifically implemented by: counting an input signal average power of the power amplifier input signal for a third preset time length, and detecting whether the input signal average power is greater than the linear region power threshold. When the average value of the input signal is greater than the linear region power threshold, adjusting the power of the power amplifier input signal to the linear region power threshold; otherwise, detecting whether the peak power of the power amplifier input signal is greater than the second preamp of the power amplifier And setting a peak signal threshold, and adjusting a peak power of the power amplifier input signal to the second preset peak signal threshold when a peak power of the power amplifier input signal is greater than the second preset peak signal threshold.
S204、将所述DAC前功放保护模块处理后的数字信号转换为模拟信号，并将所述模拟信号发送到功放。S204. Convert the digital signal processed by the DAC front power amplifier protection module into an analog signal, and send the analog signal to the power amplifier.
本发明实施例提供的功放保护方法采用了在系统输入端和信号处理模块的输出端分别对信号功率做调整，来确保信号维持在功放的线性工作区域内，来实现对功放的保护。The power amplifier protection method provided by the embodiment of the invention adopts the adjustment of the signal power at the input end of the system and the output end of the signal processing module to ensure that the signal is maintained in the linear working area of the power amplifier to realize the protection of the power amplifier.
本发明实施例提供的功放保护方法还包括以下附图中未示出的步骤：The power amplifier protection method provided by the embodiment of the present invention further includes the steps not shown in the following figures:
当传输光信号的光口发生时钟失锁或掉同步时，发送第一触发信号，并以第一预设时间长度为周期，周期性监测所述光口是否恢复正常，当所述光口恢复正常时，发送第二触发信号；When the optical port of the optical signal is lost or lost, the first trigger signal is sent, and the optical port is periodically restored to be normal when the optical port is restored. When normal, the second trigger signal is sent;
在接收到所述第一触发信号时关闭功放开关，在收到所述第二触发信号时开启功放开关。The power amplifier switch is turned off when the first trigger signal is received, and the power amplifier switch is turned on when the second trigger signal is received.
为使本发明的目的、技术方案和优点更加清楚明白，下面将对本发明实施例进行详细说明。In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention will be described in detail below.
图4为本发明实施例中功率自调节的功放保护方法的具体流程图。如图4所示，本实施例中的功放保护方法具体包括以下步骤：FIG. 4 is a specific flowchart of a power self-adjusting power amplifier protection method according to an embodiment of the present invention. As shown in FIG. 4, the power amplifier protection method in this embodiment specifically includes the following steps:
步骤301，系统启动，各模块进入正常运作状态； Step 301, the system is started, and each module enters a normal operating state;
步骤302，基带信号接收模块负责接收光口过来的信号，转换为数字信号，同时步骤303判断接收过程中，光口是否有时钟失锁或者掉同步，如果有时钟失锁或者掉同步，步骤304将功放开关关闭，否则功放正常运作，进入步骤305基带信号功率处理；Step 302: The baseband signal receiving module is responsible for receiving the signal from the optical port and converting it into a digital signal, and at step 303, determining whether the optical port has a clock loss or synchronization during the receiving process, if there is a clock loss or synchronization, step 304 Turn off the power amplifier switch, otherwise the power amplifier works normally, and enter step 305 baseband signal power processing;
步骤306判断基带均值功率是否超过门限值，如果超过门限值，进入步骤307进行基带信号均值功率调整，否则不处理，进入步骤308判断峰值功率是否超过门限，如果超过门限值，进入步骤309进行基带信号峰值功率调整，否则不处理；Step 306: determining whether the baseband average power exceeds the threshold. If the threshold is exceeded, the process proceeds to step 307 to perform baseband signal average power adjustment. Otherwise, the process proceeds to step 308 to determine whether the peak power exceeds the threshold. If the threshold is exceeded, the process proceeds to the step. 309 performs baseband signal peak power adjustment, otherwise it is not processed;
步骤310是系统功能性的信号处理；Step 310 is signal processing of system functionality;
步骤311是对DAC前信号功率处理，步骤312判断DAC前的功放输入信号均值功率是否超过门限值，如果超过门限值，进入步骤313进行功放输入信号均值功率调整，否则不处理，进入步骤314判断功放输入信号峰值功率是否超过门限，如果超过门限值，进入步骤315进行功放输入信号峰值功率调整，否则不处理；Step 311 is to process the power of the DAC signal, and step 312 is to determine whether the power of the power amplifier input signal before the DAC exceeds the threshold. If the threshold is exceeded, the process proceeds to step 313 to adjust the power of the power input signal. Otherwise, the process is not processed. 314: determining whether the peak power of the power amplifier input signal exceeds a threshold, if the threshold is exceeded, proceed to step 315 to perform peak power adjustment of the power amplifier input signal, otherwise no processing;
最后步骤316将调整后的功放输入信号通过数模转换发送至射频功放。Finally, step 316 sends the adjusted power amplifier input signal to the RF power amplifier through digital-to-analog conversion.
对于方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本发明实施例并不受所描述的动作顺序的限制，因为依据本发明实施例，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作并不一定是本发明实施例所必须的。For the method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the embodiments of the present invention are not limited by the described action sequence, because the embodiment according to the present invention Some steps can be performed in other orders or at the same time. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.
本发明实施例提供的功放保护方法及装置，通过从信号的进入端和信号处理模块的输出端对信号功率进行一个有效控制，对信号处理过程进行整体分析，从而来保持输出信号在功放的线性区域功率阈值内，不仅保护系统中的功放在正常工作中不被损坏，以达到功放保护作用，而且也使得信号的持续性能得以保存，增加了系统可靠性。The power amplifier protection method and device provided by the embodiments of the present invention perform an overall analysis on the signal processing process by controlling the signal power from the input end of the signal and the output end of the signal processing module, thereby maintaining the linearity of the output signal in the power amplifier. Within the regional power threshold, not only the power in the protection system is not damaged during normal operation, but also the protection of the power amplifier, and the sustained performance of the signal is preserved, which increases the reliability of the system.
此外，本发明实施例还提供了一种发射机，所述发射机包括如上任一实施例所述的功放保护装置。具体的，以如图1所述的功放保护装置为例对本发明实施例提供的发射机进行具体说明。本发明实施例提供的发射机包括如图1所述的功放保护装置、功放模块以及功放模块前端的信号处理模块，功放保护装置中的基带信号接收模块101、基带功放保护模块102依次连接于信号处理模块之前，DAC前功放保护模块103和数模转换模块104依次连接于信号处理模块之后。本发明实施例提供的发射机采用FPGA芯片做数字信号处理工作，以实现功放保护，没有多余的外部电路再去控制，不需要增加额外的成本，也无须过多的人工干预，软件配置方便。而且，通过对信号处理过程进行整体分析，从而来保持输出信号在功放的线性区域功率阈值内，不仅有利于信号在功 放的线性区内工作，同时，保证信号的性能。In addition, an embodiment of the present invention further provides a transmitter, where the transmitter includes the power amplifier protection device according to any of the above embodiments. Specifically, the transmitter provided by the embodiment of the present invention is specifically described by taking a power amplifier protection device as shown in FIG. 1 as an example. The transmitter provided by the embodiment of the present invention includes the power amplifier protection device, the power amplifier module and the signal processing module of the front end of the power amplifier module, and the baseband signal receiving module 101 and the baseband power amplifier protection module 102 in the power amplifier protection device are sequentially connected to the signal. Before processing the module, the DAC front power amplifier protection module 103 and the digital to analog conversion module 104 are sequentially connected to the signal processing module. The transmitter provided by the embodiment of the invention uses the FPGA chip to perform digital signal processing to realize power amplifier protection. There is no redundant external circuit to control, no additional cost is needed, and no manual intervention is required, and the software configuration is convenient. Moreover, by performing an overall analysis of the signal processing process, the output signal is kept within the linear region power threshold of the power amplifier, which not only facilitates the operation of the signal in the linear region of the power amplifier, but also ensures the performance of the signal.
本领域的技术人员能够理解，尽管在此的一些实施例包括其它实施例中所包括的某些特征而不是其它特征，但是不同实施例的特征的组合意味着处于本发明的范围之内并且形成不同的实施例。例如，在下面的权利要求书中，所要求保护的实施例的任意之一都可以以任意的组合方式来使用。Those skilled in the art will appreciate that although some embodiments herein include certain features that are included in other embodiments and not other features, combinations of features of different embodiments are intended to be within the scope of the invention and Different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

  1. 一种功放保护装置，其特征在于，包括基带信号接收模块、基带功放保护模块、DAC前功放保护模块和数模转换模块；A power amplifier protection device, comprising: a baseband signal receiving module, a baseband power amplifier protection module, a DAC front power amplifier protection module and a digital to analog conversion module;
    所述基带信号接收模块，用于将接收到的光信号转换为基带数字信号；The baseband signal receiving module is configured to convert the received optical signal into a baseband digital signal;
    所述基带功放保护模块，用于检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；The baseband power amplifier protection module is configured to detect whether a power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and adjust power of the baseband digital signal when a power of the baseband digital signal is greater than the linear region power threshold Within the linear region power threshold;
    所述DAC前功放保护模块，用于检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；The DAC front power amplifier protection module is configured to detect whether the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold, and when the power of the power amplifier input signal is greater than the linear region power threshold, Adjusting a power of the power amplifier input signal to the linear region power threshold;
    所述数模转换模块，用于将所述DAC前功放保护模块处理后的数字信号转换为模拟信号，并将所述模拟信号发送到功放。The digital-to-analog conversion module is configured to convert a digital signal processed by the DAC front power amplifier protection module into an analog signal, and send the analog signal to a power amplifier.
  2. 根据权利要求1所述的功放保护装置，其特征在于，所述功放保护装置还包括功放控制模块；The power amplifier protection device according to claim 1, wherein the power amplifier protection device further comprises a power amplifier control module;
    所述基带信号接收模块，还用于当传输光信号的光口发生时钟失锁或掉同步时，向所述功放控制模块发送第一触发信号，并以第一预设时间长度为周期，周期性监测所述光口是否恢复正常，当所述光口恢复正常时，向所述功放控制模块发送第二触发信号；The baseband signal receiving module is further configured to send a first trigger signal to the power amplifier control module when a clock loss or synchronization of the optical port of the optical signal is transmitted, and the period is a period of a first preset time period, and the period is Monitoring whether the optical port returns to normal, and sending a second trigger signal to the power amplifier control module when the optical port returns to normal;
    所述功放控制模块，用于在接收到所述第一触发信号时关闭功放开关，在收到所述第二触发信号时开启功放开关。The power amplifier control module is configured to turn off the power amplifier switch when the first trigger signal is received, and turn on the power amplifier switch when the second trigger signal is received.
  3. 根据权利要求1或2所述的功放保护装置，其特征在于，所述基带功放保护模块包括均值功率控制子模块和第一峰值功率控制子模块；The power amplifier protection device according to claim 1 or 2, wherein the baseband power amplifier protection module comprises a mean power control submodule and a first peak power control submodule;
    所述均值功率控制子模块，用于统计所述基带数字信号在第二预设时间长度内的基带信号均值功率，检测所述基带信号均值功率是否大于功放的线性区域功率阈值，当所述基带信号均值功率大于所述线性区域功率阈值时，将所述 基带数字信号的功率调节到所述线性区域功率阈值内；The average power control sub-module is configured to calculate a baseband signal average power of the baseband digital signal for a second preset time length, and detect whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, when the baseband When the signal mean power is greater than the linear region power threshold, adjusting the power of the baseband digital signal to the linear region power threshold;
    所述第一峰值功率控制子模块，用于当所述基带信号均值功率小于或等于所述线性区域功率阈值时，检测所述基带数字信号的峰值功率是否大于功放的第一预设峰值信号阈值，当所述基带数字信号的峰值功率大于所述第一预设峰值信号阈值时，将所述基带数字信号的峰值功率调节到所述第一预设峰值信号阈值内。The first peak power control submodule is configured to detect whether a peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier when the baseband signal average power is less than or equal to the linear region power threshold And adjusting a peak power of the baseband digital signal to the first preset peak signal threshold when a peak power of the baseband digital signal is greater than the first preset peak signal threshold.
  4. 根据权利要求1或2所述的功放保护装置，其特征在于，所述DAC前功放保护模块包括反馈均值功率控制子模块和第二峰值功率控制子模块；The power amplifier protection device according to claim 1 or 2, wherein the DAC front power amplifier protection module comprises a feedback mean power control submodule and a second peak power control submodule;
    所述反馈均值功率控制子模块，用于统计所述功放输入信号在第三预设时间长度内的输入信号均值功率，检测所述功放输入信号均值功率是否大于所述线性区域功率阈值，当所述功放输入信号均值大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；The feedback average power control sub-module is configured to count an input signal average power of the power amplifier input signal for a third preset time length, and detect whether the average power of the power amplifier input signal is greater than the linear region power threshold. When the average value of the power amplifier input signal is greater than the linear region power threshold, the power of the power amplifier input signal is adjusted to the linear region power threshold;
    所述第二峰值功率控制子模块，用于当所述功放输入信号均值小于或等于所述线性区域功率阈值时，检测所述功放输入信号的峰值功率是否大于功放的第二预设峰值信号阈值，当所述功放输入信号的峰值功率大于所述第二预设峰值信号阈值时，将所述功放输入信号的峰值功率调节到所述第二预设峰值信号阈值内。The second peak power control submodule is configured to detect, when the average value of the power amplifier input signal is less than or equal to the linear region power threshold, whether a peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier And adjusting a peak power of the power amplifier input signal to the second preset peak signal threshold when a peak power of the power amplifier input signal is greater than the second preset peak signal threshold.
  5. 根据权利要求4所述的功放保护装置，其特征在于，上述反馈均值功率控制子模块采用自动增益控制电路实现。The power amplifier protection device according to claim 4, wherein the feedback mean power control sub-module is implemented by an automatic gain control circuit.
  6. 一种功放保护方法，其特征在于，包括:A power amplifier protection method, comprising:
    将接收到的光信号转换为基带数字信号；Converting the received optical signal into a baseband digital signal;
    检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；Detecting whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, and adjusting the power of the baseband digital signal to the linear region power threshold when the power of the baseband digital signal is greater than the linear region power threshold;
    检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值 时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；Detecting whether the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the linear region power threshold. When the power of the power amplifier input signal is greater than the linear region power threshold, adjusting the power of the power amplifier input signal to Within the linear region power threshold;
    将所述DAC前功放保护模块处理后的数字信号转换为模拟信号，并将所述模拟信号发送到功放。Converting the digital signal processed by the DAC preamplifier protection module into an analog signal, and transmitting the analog signal to the power amplifier.
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：The method of claim 6 wherein the method further comprises:
    当传输光信号的光口发生时钟失锁或掉同步时，发送第一触发信号，并以第一预设时间长度为周期，周期性监测所述光口是否恢复正常，当所述光口恢复正常时，发送第二触发信号；When the optical port of the optical signal is lost or lost, the first trigger signal is sent, and the optical port is periodically restored to be normal when the optical port is restored. When normal, the second trigger signal is sent;
    在接收到所述第一触发信号时关闭功放开关，在收到所述第二触发信号时开启功放开关。The power amplifier switch is turned off when the first trigger signal is received, and the power amplifier switch is turned on when the second trigger signal is received.
  8. 根据权利要求6或7所述的方法，其特征在于，所述检测所述基带数字信号的功率是否大于功放的线性区域功率阈值，当基带数字信号的功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内，包括：The method according to claim 6 or 7, wherein the detecting whether the power of the baseband digital signal is greater than a linear region power threshold of the power amplifier, when the power of the baseband digital signal is greater than the linear region power threshold, The power of the baseband digital signal is adjusted to the linear region power threshold, including:
    统计所述基带数字信号在第二预设时间长度内的基带信号均值功率，检测所述基带信号均值功率是否大于功放的线性区域功率阈值，当所述基带信号均值功率大于所述线性区域功率阈值时，将所述基带数字信号的功率调节到所述线性区域功率阈值内；And calculating a baseband signal average power of the baseband digital signal in a second preset time length, detecting whether the baseband signal average power is greater than a linear region power threshold of the power amplifier, and when the baseband signal average power is greater than the linear region power threshold Adjusting the power of the baseband digital signal to the linear region power threshold;
    否则，检测所述基带数字信号的峰值功率是否大于功放的第一预设峰值信号阈值，当所述基带数字信号的峰值功率大于所述第一预设峰值信号阈值时，将所述基带数字信号的峰值功率调节到所述第一预设峰值信号阈值内。Otherwise, detecting whether the peak power of the baseband digital signal is greater than a first preset peak signal threshold of the power amplifier, and when the peak power of the baseband digital signal is greater than the first preset peak signal threshold, the baseband digital signal is The peak power is adjusted to within the first predetermined peak signal threshold.
  9. 根据权利要求6或7所述的方法，其特征在于，所述检测经过功放前端的信号处理模块处理后的功放输入信号的功率是否大于所述线性区域功率阈值，当功放输入信号的功率大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内，包括：The method according to claim 6 or 7, wherein the power of the power amplifier input signal processed by the signal processing module of the power amplifier front end is greater than the power threshold of the linear region, and the power of the power amplifier input signal is greater than When the linear region power threshold is described, the power of the power amplifier input signal is adjusted to the linear region power threshold, including:
    统计所述功放输入信号在第三预设时间长度内的输入信号均值功率，检测所述输入信号均值功率是否大于所述线性区域功率阈值，当所述输入信号均值 大于所述线性区域功率阈值时，将所述功放输入信号的功率调节到所述线性区域功率阈值内；And calculating an input signal average power of the power amplifier input signal for a third preset time length, detecting whether the input signal average power is greater than the linear region power threshold, when the input signal mean is greater than the linear region power threshold And adjusting a power of the power amplifier input signal to the linear region power threshold;
    否则，检测所述功放输入信号的峰值功率是否大于功放的第二预设峰值信号阈值，当所述功放输入信号的峰值功率大于所述第二预设峰值信号阈值时，将所述功放输入信号的峰值功率调节到所述第二预设峰值信号阈值内。Otherwise, detecting whether the peak power of the power amplifier input signal is greater than a second preset peak signal threshold of the power amplifier, and when the peak power of the power amplifier input signal is greater than the second preset peak signal threshold, the power amplifier input signal is The peak power is adjusted to within the second predetermined peak signal threshold.
  10. 一种发射机，其特征在于，包括如权利要求1至5任一项所述的功放保护装置。A transmitter characterized by comprising the power amplifier protection device according to any one of claims 1 to 5.
PCT/CN2018/097581 2017-10-26 2018-07-27 Power amplifier protection method and device WO2019080566A1 (en)

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