WO2012155786A1 - Method for improving power amplifier working efficiency and communication terminal - Google Patents

Method for improving power amplifier working efficiency and communication terminal Download PDF

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Publication number
WO2012155786A1
WO2012155786A1 PCT/CN2012/074865 CN2012074865W WO2012155786A1 WO 2012155786 A1 WO2012155786 A1 WO 2012155786A1 CN 2012074865 W CN2012074865 W CN 2012074865W WO 2012155786 A1 WO2012155786 A1 WO 2012155786A1
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WIPO (PCT)
Prior art keywords
power
voltage
efficiency
output
communication terminal
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PCT/CN2012/074865
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French (fr)
Chinese (zh)
Inventor
谢卫博
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中兴通讯股份有限公司
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Publication of WO2012155786A1 publication Critical patent/WO2012155786A1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers

Definitions

  • the present invention relates to the field of communications technologies, and more particularly to a method and communication terminal for improving the efficiency of power amplifier operation. Background technique
  • the Power Amplifier (PA) in a mobile communication terminal is a very power consuming device that can consume a large amount of battery power. Reducing the power consumption of the PA can save a lot of battery power and delay battery life.
  • a conventional communication terminal generally includes a baseband integrated circuit (BBIC), an erasable memory, a radio frequency integrated circuit (RFIC), and a power management chip (Power Management IC, PMIC), PA, receipt Duplexer duplexer and antenna (Ante
  • the BBIC is used to collect signals such as sound, image or data in the uplink, and samples the collected signals to obtain a digital baseband signal, and transmits the digital baseband signal to the RFICo.
  • the RFIC is used in the uplink to modulate the received digital baseband signal, to apply the digital baseband signal modulation to the RF signal, and to the PA; in the downlink, to demodulate the signal sent by the transceiver duplexer Later sent to BBIC.
  • the PA is used to amplify the received RF signal and send the amplified signal to the transceiver.
  • the transceiver duplexer is used in the uplink to filter out harmonics in the enhanced RF signal and send it to the antenna; in the downlink, the signal sent from the antenna is sent to the RFIC.
  • the erasable memory is used to store software and data required by the communication terminal during operation, and is called by the BBIC.
  • the antenna is used in the uplink to transmit the radio frequency signal that filters out the harmonics; in the downlink, it is used to receive the signal from the base station.
  • the PMIC is used to provide the BBIC, RFIC, and PA with the voltages required for their proper operation.
  • the operating voltage Vcc supplied to the PA by the PMIC remains constant.
  • the ratio of the actual output power of the PA to the power consumed is the efficiency. Only by increasing the efficiency of the PA can the energy consumed by the PA itself be minimized.
  • the efficiency of the PA operating at peak power is usually designed to a higher value to improve the efficiency of the PA when operating at high power.
  • the operating voltage Vcc of the PA is directly provided by the PMIC.
  • Vcc is kept at a certain value, so that the PA efficiency can be optimized only when the PA output power reaches the peak power.
  • the PA of the mobile communication terminal works at medium and low power most of the time, and the working efficiency of the PA is rapidly reduced when the medium and low power is operated.
  • the conventional efficiency power curve is as shown in FIG. 2, even if the PA is peaked. Efficiency when working at power It is usually also below the maximum efficiency of 50% or less. Therefore, it is not very reasonable to design the PA to work at a peak power efficiency. Most of the time, the PA still works at a lower efficiency. Summary of the invention
  • the object of the present invention is to overcome the disadvantages of the power amplifier PA inefficiency existing in the prior art, and to provide a method and communication terminal for improving the power efficiency of the PA.
  • the invention provides a method for improving the working efficiency of a power amplifier of a communication terminal, adding DC/DC in the communication terminal; testing and counting PA output power and efficiency data under different working voltages; according to the PA output power and efficiency data Determining the correspondence between the output power and the working voltage when the PA works at the optimal efficiency; storing the data of the corresponding relationship; when the PA works at a certain power level, calling the corresponding corresponding power level in the corresponding relationship Voltage data information, which controls the voltage value corresponding to the DC/DC output.
  • the statistical test data is fitted to a set of corresponding curves of the output power and the optimal efficiency of the PA at different operating voltages, and the curve is determined to be output when the PA works at the optimum efficiency.
  • the corresponding curve for fitting the output power and the optimal efficiency is: an efficiency curve of the PA within the rated operating voltage range over the entire power dynamic range, thereby counting the dynamic range of the entire power, The voltage data at which the power point corresponds to the optimum efficiency.
  • the power and voltage are compiled into corresponding data information to form a corresponding information table of voltage and power.
  • the DC/DC supplies power to the PA separately.
  • the invention also provides a communication terminal, the communication terminal comprising a baseband chip BBIC, a radio frequency Chip RFIC, PA, DC/DC and erasable memory;
  • the BBIC processes the received control command and can control the working state of the entire terminal
  • the RFIC can demodulate and modulate a communication signal
  • the PA can amplify the signal modulated by the RFIC
  • the DC/DC can dynamically output a stable voltage within a corresponding range
  • the erasable memory can store a corresponding information table of voltage and power, and record
  • the correspondence data between the output power and the operating voltage is obtained by: testing and counting PA output power and efficiency data at different operating voltages;
  • the PA output power and efficiency data determine the relationship between the output power and the operating voltage when the PA is operating at optimum efficiency.
  • the communication terminal invokes the voltage data information corresponding to the power level in the corresponding relationship between the output power and the operating voltage, and controls the voltage value corresponding to the DC/DC output.
  • the statistical test data is fitted to a set of corresponding curves of the output power and the optimal efficiency of the PA at different operating voltages, and the curve is determined to be output when the PA works at the optimum efficiency.
  • the power and voltage are compiled into corresponding data information to form a corresponding information table of the voltage and power.
  • the present invention provides a method for improving the working efficiency of a power amplifier of a communication terminal, the party The law includes:
  • the PA operates in accordance with the received voltage.
  • the present invention provides a communication terminal, where the communication terminal includes: a control unit, a power supply unit, and a PA, where
  • the control unit is configured to determine a power of the PA according to the received downlink signal; and determine, according to the determined power and a pre-stored corresponding power and voltage lookup table, the output voltage value of the power supply unit is determined;
  • the power supply unit is configured to output a voltage to the PA according to the determined output voltage value; and the PA is configured to operate according to the received voltage.
  • the method and the communication terminal according to the present invention can greatly improve the working efficiency of the PA of the communication terminal and increase the battery life of the communication terminal.
  • 1 is a schematic diagram of the composition of a communication terminal in the prior art
  • FIG. 2 is a schematic diagram showing the working efficiency of a power amplifier in the prior art
  • FIG. 3 is a schematic diagram showing the composition of an embodiment of a communication terminal according to the present invention.
  • Figure 4 is a graphical representation of the output power and actual voltage when the PA is operating at high efficiency through testing
  • FIG. 5 is a schematic flow chart of a method for improving the working efficiency of a power amplifier according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram showing a working efficiency of a power amplifier according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a lookup table in an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for improving the efficiency of a power amplifier of a communication terminal, the method comprising:
  • the PA operates in accordance with the received voltage.
  • the present invention also provides a communication terminal for implementing the above method, the communication terminal comprising: a control unit, a power supply unit, and a PA, wherein
  • the control unit is configured to determine a power of the PA according to the received downlink signal, and determine, according to the determined power and a pre-stored corresponding lookup table of power and voltage, the determined output voltage value; the power supply unit, configured to determine Output voltage value to the PA output voltage;
  • the PA is for operating according to the received voltage.
  • control unit uses BBIC
  • power supply unit uses a PMIC and a direct current to direct current (DC/DC).
  • the communication terminal of the present invention is based on an existing communication terminal, and a DC/DC is added, and the DC/DC is connected to the BBIC, the PMIC, and the PA, respectively, as shown in FIG.
  • the DC/DC draws a constant voltage from the PMIC and then supplies a variable voltage to the PA according to the BBIC control command.
  • the PA operates at the voltage provided by the DC/DC, it has higher efficiency.
  • the communication terminal of the present example includes: BBIC, RFIC, PA, transceiver duplexer, erasable memory, antenna, PMIC, and DC/ DC.
  • the antenna is configured to receive a downlink signal sent by the base station, and send the downlink signal to the transceiver duplexer; Transmitting the signal sent by the transceiver duplexer to the uplink base station;
  • the transceiver duplexer is configured to send a signal sent by the antenna to the RFIC; and is further configured to filter out harmonics in the signal sent by the PA, and send the processed signal to the antenna;
  • the RFIC is configured to demodulate and modulate a signal sent from the transceiver duplexer, and send the processed signal to the BBIC; and also modulate the received digital baseband signal to modulate the digital baseband signal to the digital baseband signal RF signal, and sent to the PA;
  • the BBIC is configured to determine a power of the PA according to a signal sent by the RFIC, and determine a DC/DC output voltage value according to the determined power and a corresponding lookup table of the power and voltage stored in the erasable memory; A signal such as sound, image or data is collected, and the acquired signal is sampled to obtain a digital baseband signal, and the digital baseband signal is transmitted to the RFIC.
  • the PA is configured to amplify the received RF signal and send the amplified signal to the transceiver duplexer.
  • the PMIC provides a constant voltage to BBIC, RFIC and DC/DC.
  • the DC/DC is used to output a voltage to the PA according to the output voltage value determined by the BBIC.
  • the erasable memory is configured to store a corresponding lookup table of power and voltage.
  • the corresponding power and voltage lookup table can be obtained by the following method.
  • Pre-test a PA at different operating voltages a PA at different operating voltages.
  • the power value of the PA is stored correspondingly to the voltage value and the power value, and the corresponding data is obtained, and the corresponding curve is obtained according to the corresponding data.
  • the rated operating voltage of the PA Vcc ranges from 0.6 to 3.6v, which can be measured every 0.25v.
  • the corresponding curves of the respective PAs were fitted to obtain a corresponding curve of voltage and power when the PA efficiency was high, as shown in FIG. 4 . Because different batches and different manufacturers have different PAs, By fitting the corresponding data of the plurality of PAs obtained, data with less error can be obtained, so that the corresponding lookup table of power and voltage is more accurate.
  • the curve is converted to a corresponding lookup table of power and voltage.
  • the structure of the power and voltage corresponding lookup table is as shown in Fig. 7, and the power and voltage are corresponding.
  • FIG. 6 is a schematic diagram showing the working efficiency of the power amplifier in the embodiment of the present invention. By comparing with FIG. 2, it can be seen that the working efficiency of the PA can be effectively improved by using the present invention.
  • BBIC determines the power of the PA, and can obtain the DC/DC output voltage value according to the corresponding look-up table of power and voltage.
  • the PA can obtain high efficiency by using the obtained voltage value.
  • the signal sent by the communication terminal and the received signal strength are required to satisfy the closed-loop operating mode, that is, the sum of the received signal strength and the transmitted signal strength is a certain value, that is, if the received signal strength is large, then
  • the transmission power of the communication terminal will be relatively small; if the received signal strength is small, the transmission power of the communication terminal will be relatively large. That is, when the network environment changes, the downlink signal strength received by the communication terminal changes accordingly.
  • the communication terminal adjusts the uplink signal of the communication terminal in real time according to the received downlink signal strength of the base station. Intensity (that is, adjusting the uplink power of the output), the weaker the base station signal is, the stronger the signal of the uplink of the communication terminal is.
  • the BBIC collects signals such as sound, image or data, and samples the acquired signals to obtain a digital baseband signal, and transmits the digital baseband signal to the RFIC.
  • the RFIC modulates the received digital baseband signal and applies the digital baseband signal modulation to the shot.
  • the frequency signal is sent to the PA.
  • the antenna receives a signal sent by the base station and sends it to the transceiver duplexer.
  • the transceiver duplexer transmits a signal from the antenna to the RFIC.
  • the RFIC demodulates the signal sent from the duplexer and sends the processed signal to BBIC.
  • the BBIC determines the power of the PA based on the signal from the RFIC and finds the output voltage value of the DC/DC based on the determined power and the corresponding lookup table of the power and voltage stored in the erasable memory.
  • the DC/DC outputs a voltage to the PA according to the output voltage value determined by BBIC.
  • the PA operates according to the received voltage, amplifies the received RF signal, and transmits the amplified signal to the transceiver duplexer.
  • the transceiver duplexer filters out harmonics in the signal from the PA and sends the processed signal to the antenna.
  • the antenna transmits a signal sent from the transceiver duplexer.
  • the PMIC does not directly supply voltage to the PA, but supplies power to the PA via DC/DC
  • the BBIC controls the DC/DC enable according to the output power of the PA, and dynamically adjusts the DC/DC output voltage Vcc. , so that the PA is always in the best working condition.
  • the technical scheme of the invention can effectively improve the working efficiency of the PA working in the medium and low power mode, reduce the power consumption of the terminal, prolong the battery life of the terminal product, and improve the user experience.
  • the communication terminal provided by the present invention is a mobile broadband wireless terminal product, and the mobile broadband wireless terminal product may include:
  • the BBIC is capable of processing the received control commands and is capable of controlling the operating state of the entire terminal.
  • the RFIC is configured to demodulate and modulate a communication signal.
  • the PA is used to amplify the signal modulated by the RFIC and then transmitted through the antenna.
  • the DC/DC is used for dynamic output to ensure a stable voltage for the normal operation of the PA.
  • the erasable memory is used to store software and data required by the terminal during operation.
  • the method includes: pre-testing corresponding data of PA output power and efficiency under different working voltages, the data needs batch test statistics, and data sampling is performed as much as possible.
  • the statistical test data is fitted to a set of corresponding curves of PA output power and optimum efficiency at different operating voltages.
  • the voltage data corresponding to the power level is called, and the voltage value corresponding to the DC/DC output is controlled to ensure that the efficiency of the PA is optimal in the entire functional filtering range.
  • FIG. 5 is a schematic diagram of a method for improving the working efficiency of a power amplifier of a communication terminal according to the present invention. Referring to FIG. 5, the method includes the following steps:
  • Step 501 The conventional circuit is improved, and a DC/DC is added in the circuit design; the DC/DC supplies power to the PA separately, replacing the traditional PMIC power supply mode.
  • Step 502 Calculate voltage data when the efficiency corresponding to each power point is optimal in the entire power dynamic range;
  • Step 503 According to the data collected in step 402, the corresponding relationship between the PA output power and the working voltage when the optimal working efficiency is fitted by probability statistics;
  • Step 504 Reproduce a correspondence table between the PA output power and the working voltage by using the curve;
  • the power and voltage are compiled into corresponding data information, which forms a corresponding information table of voltage and power, which is stored in the erasable memory, as shown in FIG.
  • Step 505 When the power storage information is called by the BBIC, the corresponding voltage information is simultaneously called, and the DC/DC is controlled to adjust the output voltage of the DC/DC to the desired voltage value.
  • the PA When the output voltage of the DC/DC is adjusted to the desired voltage value, the PA operates at the optimum efficiency state and reduces the PA power consumption.
  • the communication link When the user actually uses the communication link, the communication link must comply with the symmetric relationship between the uplink and downlink. Therefore, as the network environment changes, the downlink signal received by the terminal also changes, and the uplink power output by the terminal will be in real time. Adjustment.
  • the BBIC determines the network state according to the received downlink signal strength, calculates the signal strength that the PA needs to output in the state, and simultaneously calls the power information required for the pre-stored PA, and the corresponding information table of the voltage and the power. , so that the PA output power reaches the required range; at the same time, the DC/DC voltage information corresponding to the power information is called, and the DC/DC output voltage Vcc is adjusted, so that the PA satisfies the optimal efficiency state, thereby reducing power consumption and extending
  • the battery life of the terminal reduces the heating of the terminal and improves the user experience.
  • the invention can maximize the working efficiency of the PA, effectively extend the battery life of the product, reduce the heating problem of the terminal product, and improve the satisfaction of the user experience. Degree.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

The present invention provides a method for improving power amplifier working efficiency and a communication terminal. The method comprises: adding a DC/DC in a communication terminal; testing and making statistics on output power and efficiency data of a power amplifier at different working voltages; according to the data, determining the correspondence between the output power and the working voltage when the power amplifier works with an optimal efficiency; storing data of the correspondence; and when the power amplifier works at a certain power level, invoking voltage data information corresponding to the power level in the correspondence, and controlling the DC/DC to output a corresponding voltage value. By using the method and communication terminal of the present invention, the working efficiency of the power amplifier of the communication terminal can be improved to a large extent, thereby increasing the battery life of the communication terminal.

Description

一种提高功率放大器工作效率的方法及通信终端 技术领域  Method for improving working efficiency of power amplifier and communication terminal
本发明涉及通信技术领域， 更具体地， 涉及一种提高功率放大器工作 效率的方法及通信终端。 背景技术  The present invention relates to the field of communications technologies, and more particularly to a method and communication terminal for improving the efficiency of power amplifier operation. Background technique
随着现代通信技术的发展， 采用新型的第三代通讯技术 （The 3rd Generation, 3G )和***通讯技术 ( The 4th Generation, 4G )的移动通信 终端不断出现， 现代的移动通信终端向着小型化、 便携化、 宽带化的方向 发展， 且对传输数据的速率要求越来越高。 运营商也提供更多的移动业务， 像多媒体、 网游等业务来吸引消费者。 但是开展此类业务会使移动通信终 端消耗大量的电量， 缩短电池的续航时间， 严重影响到产品的用户体验效 果。  With the development of modern communication technologies, mobile communication terminals using the new third-generation communication technology (The 3rd Generation, 3G) and the fourth generation communication technology (The 4th Generation, 4G) are constantly appearing, and modern mobile communication terminals are facing small The development of portability, portability, and broadband is becoming more and more demanding. Operators also provide more mobile services, such as multimedia, online games and other services to attract consumers. However, carrying out such a business will cause the mobile communication terminal to consume a large amount of power, shorten the battery life, and seriously affect the user experience of the product.
目前， 电池占据整个移动通信终端的体积和重量中的很大一部分， 已 经影响到移动通信终端的小型化发展。 新业务的开展会进一步对移动通信 终端的供电能力提出更高要求， 在目前电池技术没有太大进展的情形下， 如何在不影响用户使用的前提下延长电池的使用时间， 成了目前的移动通 信终端设计工程师所面临的首要问题。  At present, batteries occupy a large part of the volume and weight of the entire mobile communication terminal, which has affected the miniaturization of mobile communication terminals. The development of new services will further impose higher requirements on the power supply capabilities of mobile communication terminals. In the current situation where the battery technology has not made much progress, how to extend the battery usage time without affecting the user's use has become the current mobile. The primary problem faced by communication terminal design engineers.
移动通信终端中的功率放大器（ Power Amplifier, PA )是一个功耗很大 的器件， 其能消耗大量电池电量。 减少 PA的耗电量， 就能大量节省电池的 电量， 延迟电池的使用时间。  The Power Amplifier (PA) in a mobile communication terminal is a very power consuming device that can consume a large amount of battery power. Reducing the power consumption of the PA can save a lot of battery power and delay battery life.
如图 1所示，现有的通信终端通常包括：基带芯片（Base Band Integrated Circuit, BBIC )、 可擦除式存储器， 射频芯片 （Radio Frequency Integrated Circuit, RFIC )、 电源管理芯片 （ Power Management IC、 PMIC )、 PA、 收 发双工器 Duplexer 和天线（Ante As shown in FIG. 1 , a conventional communication terminal generally includes a baseband integrated circuit (BBIC), an erasable memory, a radio frequency integrated circuit (RFIC), and a power management chip (Power Management IC, PMIC), PA, receipt Duplexer duplexer and antenna (Ante
其中， BBIC在上行中用于采集声音、 图像或数据等信号， 并将采集到 的信号进行采样处理， 得到数字基带信号， 并将所述数字基带信号传输至 RFICo  The BBIC is used to collect signals such as sound, image or data in the uplink, and samples the collected signals to obtain a digital baseband signal, and transmits the digital baseband signal to the RFICo.
RFIC在上行中用于将收到的数字基带信号进行调制 , 将数字基带信号 调制加载到射频信号上， 并发送给 PA; 在下行中用于将收发双工器发来的 信号进行解调处理后发给 BBIC。  The RFIC is used in the uplink to modulate the received digital baseband signal, to apply the digital baseband signal modulation to the RF signal, and to the PA; in the downlink, to demodulate the signal sent by the transceiver duplexer Later sent to BBIC.
PA用于将收到的射频信号进行放大， 并将放大后的信号发送给收发双 工器。  The PA is used to amplify the received RF signal and send the amplified signal to the transceiver.
收发双工器在上行中用于滤除增强的射频信号中的谐波， 并发送给天 线； 在下行中用于将天线发来的信号发送给 RFIC。  The transceiver duplexer is used in the uplink to filter out harmonics in the enhanced RF signal and send it to the antenna; in the downlink, the signal sent from the antenna is sent to the RFIC.
所述可擦除式存储器用于存放通信终端在工作过程中所需要的软件以 及数据， 供 BBIC调用。  The erasable memory is used to store software and data required by the communication terminal during operation, and is called by the BBIC.
天线在上行中用于将滤除谐波的射频信号发射出去； 在下行中用于接 收基站发来的信号。  The antenna is used in the uplink to transmit the radio frequency signal that filters out the harmonics; in the downlink, it is used to receive the signal from the base station.
PMIC用于给 BBIC、 RFIC和 PA提供各自正常工作所需要的电压。 PMIC 提供给 PA的工作电压 Vcc保持恒定。  The PMIC is used to provide the BBIC, RFIC, and PA with the voltages required for their proper operation. The operating voltage Vcc supplied to the PA by the PMIC remains constant.
PA的实际输出功率与所消耗的功率比值为效率，只有提高 PA的效率， 才能最大程度的降低 PA自身所消耗的能量。  The ratio of the actual output power of the PA to the power consumed is the efficiency. Only by increasing the efficiency of the PA can the energy consumed by the PA itself be minimized.
目前， 通常将 PA以峰值功率工作时的效率设计为一个较高的值， 以提 高 PA在大功率工作时的效率。 但是， PA的工作电压 Vcc是由 PMIC直接 提供， 在 PA工作时 Vcc保持一定值， 这样只有在 PA输出功率达到峰值功 率时， PA 效率才能达到最佳。 而且， 在实际使用中， 移动通信终端的 PA 绝大多数时间以中低功率工作， 在中低功率工作时 PA 的工作效率迅速降 低， 传统的效率功率曲线如图 2所示， 即使 PA以峰值功率工作时， 其效率 通常也低于最高效率 50%以下。因此将 PA以峰值功率工作时的效率设计为 一个较高的值并不是十分合理， 绝大多数时间 PA依然以较低的效率工作。 发明内容 At present, the efficiency of the PA operating at peak power is usually designed to a higher value to improve the efficiency of the PA when operating at high power. However, the operating voltage Vcc of the PA is directly provided by the PMIC. When the PA is operating, Vcc is kept at a certain value, so that the PA efficiency can be optimized only when the PA output power reaches the peak power. Moreover, in actual use, the PA of the mobile communication terminal works at medium and low power most of the time, and the working efficiency of the PA is rapidly reduced when the medium and low power is operated. The conventional efficiency power curve is as shown in FIG. 2, even if the PA is peaked. Efficiency when working at power It is usually also below the maximum efficiency of 50% or less. Therefore, it is not very reasonable to design the PA to work at a peak power efficiency. Most of the time, the PA still works at a lower efficiency. Summary of the invention
本发明目的是： 克服现有技术中存在的功率放大器 PA效率低下的缺 陷， 提出一种提高 PA的功率效率的方法及通信终端。  The object of the present invention is to overcome the disadvantages of the power amplifier PA inefficiency existing in the prior art, and to provide a method and communication terminal for improving the power efficiency of the PA.
本发明提出一种提高通信终端功率放大器工作效率的方法， 在通信终 端中增加 DC/DC; 测试并统计在不同的工作电压下的 PA输出功率和效率 数据； 根据所述 PA输出功率和效率数据， 确定 PA工作在最佳效率时， 输 出功率和工作电压的对应关系； 把所述对应关系的数据存储； 当 PA工作在 某一个功率等级时， 调用上述对应关系中该功率等级下所对应的电压数据 信息， 控制 DC/DC输出对应的电压值。  The invention provides a method for improving the working efficiency of a power amplifier of a communication terminal, adding DC/DC in the communication terminal; testing and counting PA output power and efficiency data under different working voltages; according to the PA output power and efficiency data Determining the correspondence between the output power and the working voltage when the PA works at the optimal efficiency; storing the data of the corresponding relationship; when the PA works at a certain power level, calling the corresponding corresponding power level in the corresponding relationship Voltage data information, which controls the voltage value corresponding to the DC/DC output.
进一步地，将所述统计出的测试数据拟合出一组在 PA在不同的工作电 压下， 输出功率和最佳效率的对应曲线， 通过该曲线确定出在 PA工作在最 佳效率时， 输出功率和工作电压之间的对应关系。  Further, the statistical test data is fitted to a set of corresponding curves of the output power and the optimal efficiency of the PA at different operating voltages, and the curve is determined to be output when the PA works at the optimum efficiency. The correspondence between power and operating voltage.
进一步地， 所述拟合出输出功率和最佳效率的对应曲线为： PA在额定 工作电压范围内， 在整个功率动态范围内的效率曲线， 以此统计出在整个 功率的动态范围内， 各功率点所对应效率达到最佳时的电压数据。  Further, the corresponding curve for fitting the output power and the optimal efficiency is: an efficiency curve of the PA within the rated operating voltage range over the entire power dynamic range, thereby counting the dynamic range of the entire power, The voltage data at which the power point corresponds to the optimum efficiency.
进一步地， 根据所述统计出的功率点对应效率达到最佳的电压数据， 以概率统计拟合出一个最佳工作效率时的 PA输出功率和工作电压的对应 关系曲线；  Further, according to the calculated power point corresponding efficiency reaches the optimal voltage data, and the corresponding relationship curve between the PA output power and the working voltage when the optimal working efficiency is fitted by probability statistics;
以所述曲线制作 PA输出功率和工作电压的对应关系表；  Making a correspondence table between the PA output power and the operating voltage by using the curve;
将功率和电压编译成对应的数据信息， 形成一个电压和功率的对应信 息表。  The power and voltage are compiled into corresponding data information to form a corresponding information table of voltage and power.
进一步地， 所述 DC/DC单独给 PA进行供电。  Further, the DC/DC supplies power to the PA separately.
本发明还提出一种通信终端， 所述通信终端包括基带芯片 BBIC、 射频 芯片 RFIC、 PA、 DC/DC和可擦除式存储器； The invention also provides a communication terminal, the communication terminal comprising a baseband chip BBIC, a radio frequency Chip RFIC, PA, DC/DC and erasable memory;
所述 BBIC处理接收到的控制指令，并能对整个终端的工作状态进行控 制；  The BBIC processes the received control command and can control the working state of the entire terminal;
所述 RFIC, 可对通信信号进行解调和调制；  The RFIC can demodulate and modulate a communication signal;
所述 PA, 可放大 RFIC调制后的信号；  The PA can amplify the signal modulated by the RFIC;
所述 DC/DC , 可在相应的范围内动态输出稳定的电压；  The DC/DC can dynamically output a stable voltage within a corresponding range;
所述可擦除式存储器， 可存储一个电压和功率的对应信息表， 记录当 The erasable memory can store a corresponding information table of voltage and power, and record
PA工作在最佳效率时， 输出功率和工作电压的对应关系数据。 When the PA works at the optimum efficiency, the corresponding relationship between the output power and the operating voltage.
进一步地， 所述输出功率和工作电压的对应关系数据通过如下方式获 取： 测试并统计在不同的工作电压下的 PA输出功率和效率数据； 根据所述 Further, the correspondence data between the output power and the operating voltage is obtained by: testing and counting PA output power and efficiency data at different operating voltages;
PA输出功率和效率数据， 确定 PA工作在最佳效率时， 输出功率和工作电 压的 ^"应关系。 The PA output power and efficiency data determine the relationship between the output power and the operating voltage when the PA is operating at optimum efficiency.
进一步地， 当所述 PA工作在某一个功率等级时， 通信终端调用所述输 出功率和工作电压的对应关系中该功率等级下所对应的电压数据信息， 控 制 DC/DC输出对应的电压值。  Further, when the PA operates at a certain power level, the communication terminal invokes the voltage data information corresponding to the power level in the corresponding relationship between the output power and the operating voltage, and controls the voltage value corresponding to the DC/DC output.
进一步地，将所述统计出的测试数据拟合出一组在 PA在不同的工作电 压下， 输出功率和最佳效率的对应曲线， 通过该曲线确定出在 PA工作在最 佳效率时， 输出功率和工作电压之间的对应关系。  Further, the statistical test data is fitted to a set of corresponding curves of the output power and the optimal efficiency of the PA at different operating voltages, and the curve is determined to be output when the PA works at the optimum efficiency. The correspondence between power and operating voltage.
进一步地， 根据所述统计出的功率点对应效率达到最佳的电压数据， 以概率统计拟合出一个最佳工作效率时的 PA输出功率和工作电压的对应 关系曲线；  Further, according to the calculated power point corresponding efficiency reaches the optimal voltage data, and the corresponding relationship curve between the PA output power and the working voltage when the optimal working efficiency is fitted by probability statistics;
以所述曲线制作 PA输出功率和工作电压的对应关系表；  Making a correspondence table between the PA output power and the operating voltage by using the curve;
将功率和电压编译成对应的数据信息， 形成所述电压和功率的对应信 息表。  The power and voltage are compiled into corresponding data information to form a corresponding information table of the voltage and power.
本发明提供了一种提高通信终端功率放大器工作效率的方法， 所述方 法包括： The present invention provides a method for improving the working efficiency of a power amplifier of a communication terminal, the party The law includes:
根据收到的下行信号确定 PA的功率；  Determining the power of the PA according to the received downlink signal;
根据确定的功率和预先存储的功率与电压的对应查找表， 查找确定输 出电压值；  Finding and determining the output voltage value according to the determined power and the pre-stored corresponding power and voltage lookup table;
根据确定的输出电压值向 PA输出电压；  Outputting a voltage to the PA according to the determined output voltage value;
所述 PA根据收到的电压进行工作。  The PA operates in accordance with the received voltage.
本发明提供了一种通信终端， 所述通信终端包括： 控制单元、 供电单 元和 PA, 其中，  The present invention provides a communication terminal, where the communication terminal includes: a control unit, a power supply unit, and a PA, where
所述控制单元， 用于根据收到的下行信号确定 PA的功率； 并根据确定 的功率和预先存储的功率与电压的对应查找表， 查找确定供电单元的输出 电压值；  The control unit is configured to determine a power of the PA according to the received downlink signal; and determine, according to the determined power and a pre-stored corresponding power and voltage lookup table, the output voltage value of the power supply unit is determined;
所述供电单元， 用于根据确定的输出电压值向 PA输出电压； 所述 PA, 用于根据收到的电压进行工作。  The power supply unit is configured to output a voltage to the PA according to the determined output voltage value; and the PA is configured to operate according to the received voltage.
综上所述， 采用本发明具有如下有益效果：  In summary, the use of the present invention has the following beneficial effects:
与现有技术相比， 采用本发明所述的方法和通信终端， 能较大程度提 升通信终端的 PA的工作效率， 增加通信终端的电池续航能力。 附图说明  Compared with the prior art, the method and the communication terminal according to the present invention can greatly improve the working efficiency of the PA of the communication terminal and increase the battery life of the communication terminal. DRAWINGS
图 1是现有技术中通信终端的组成示意图；  1 is a schematic diagram of the composition of a communication terminal in the prior art;
图 2是现有技术中功率放大器工作效率的曲线示意图；  2 is a schematic diagram showing the working efficiency of a power amplifier in the prior art;
图 3是本发明通信终端的实施例的组成示意图；  3 is a schematic diagram showing the composition of an embodiment of a communication terminal according to the present invention;
图 4是通过测试得出的当 PA以高效率工作时，输出功率和实际电压的 曲线示意图；  Figure 4 is a graphical representation of the output power and actual voltage when the PA is operating at high efficiency through testing;
图 5本发明实施例提高功率放大器工作效率的方法的流程示意图； 图 6是本发明实施例中功率放大器工作效率的曲线示意图；  5 is a schematic flow chart of a method for improving the working efficiency of a power amplifier according to an embodiment of the present invention; FIG. 6 is a schematic diagram showing a working efficiency of a power amplifier according to an embodiment of the present invention;
图 7是本发明实施例中查找表的结构示意图。 具体实施方式 本发明提供了一种提高通信终端功率放大器工作效率的方法， 所述方 法包括： FIG. 7 is a schematic structural diagram of a lookup table in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for improving the efficiency of a power amplifier of a communication terminal, the method comprising:
根据收到的下行信号确定 PA的功率；  Determining the power of the PA according to the received downlink signal;
根据确定的功率和预先存储的功率与电压的对应查找表， 查找确定输 出电压值；  Finding and determining the output voltage value according to the determined power and the pre-stored corresponding power and voltage lookup table;
根据确定的输出电压值向 PA输出电压；  Outputting a voltage to the PA according to the determined output voltage value;
所述 PA根据收到的电压进行工作。  The PA operates in accordance with the received voltage.
本发明还提供了一种实现上述方法的通信终端， 所述通信终端包括： 控制单元、 供电单元和 PA, 其中，  The present invention also provides a communication terminal for implementing the above method, the communication terminal comprising: a control unit, a power supply unit, and a PA, wherein
所述控制单元， 用于根据收到的下行信号确定 PA的功率； 并根据确定 的功率和预先存储的功率与电压的对应查找表， 查找确定输出电压值； 所述供电单元， 用于根据确定的输出电压值向 PA输出电压；  The control unit is configured to determine a power of the PA according to the received downlink signal, and determine, according to the determined power and a pre-stored corresponding lookup table of power and voltage, the determined output voltage value; the power supply unit, configured to determine Output voltage value to the PA output voltage;
所述 PA, 用于根据收到的电压进行工作。  The PA is for operating according to the received voltage.
下面对所述通信终端进行介绍，本实施例中，所述控制单元采用 BBIC, 所述供电单元采用 PMIC 和直流电压转换芯片 （Direct Current to Direct Current, DC/DC )。  The communication terminal is described below. In this embodiment, the control unit uses BBIC, and the power supply unit uses a PMIC and a direct current to direct current (DC/DC).
本发明的通信终端是在现有通信终端的基础上， 增加一个 DC/DC, 所 述 DC/DC分别与 BBIC、 PMIC以及 PA连接， 参考图 3所示。  The communication terminal of the present invention is based on an existing communication terminal, and a DC/DC is added, and the DC/DC is connected to the BBIC, the PMIC, and the PA, respectively, as shown in FIG.
所述 DC/DC从 PMIC获取恒定电压， 再根据 BBIC的控制指令向 PA 提供可变的电压， 当 PA以 DC/DC提供的电压工作时， 会有较高的效率。  The DC/DC draws a constant voltage from the PMIC and then supplies a variable voltage to the PA according to the BBIC control command. When the PA operates at the voltage provided by the DC/DC, it has higher efficiency.
图 3是本发明通信终端的实施例的组成示意图， 如图 3所示， 本实例 的通信终端包括： BBIC、 RFIC、 PA、 收发双工器、 可擦除式存储器、 天线、 PMIC和 DC/DC。  3 is a schematic diagram of the composition of an embodiment of a communication terminal according to the present invention. As shown in FIG. 3, the communication terminal of the present example includes: BBIC, RFIC, PA, transceiver duplexer, erasable memory, antenna, PMIC, and DC/ DC.
所述天线， 用于接收基站发来的下行信号， 并发给收发双工器； 还用 于将收发双工器发来的信号向上行基站发送出去； The antenna is configured to receive a downlink signal sent by the base station, and send the downlink signal to the transceiver duplexer; Transmitting the signal sent by the transceiver duplexer to the uplink base station;
所述收发双工器，用于将天线发来的信号发送给 RFIC;还用于滤除 PA 发来的信号中的谐波， 并将处理后的信号发送给天线；  The transceiver duplexer is configured to send a signal sent by the antenna to the RFIC; and is further configured to filter out harmonics in the signal sent by the PA, and send the processed signal to the antenna;
RFIC, 用于将收发双工器发来的信号进行解调和调制处理， 并将处理 后的信号发给 BBIC; 还用于将收到的数字基带信号进行调制， 将数字基带 信号调制加载到射频信号上， 并发送给 PA;  The RFIC is configured to demodulate and modulate a signal sent from the transceiver duplexer, and send the processed signal to the BBIC; and also modulate the received digital baseband signal to modulate the digital baseband signal to the digital baseband signal RF signal, and sent to the PA;
所述 BBIC, 用于根据 RFIC发来的信号确定 PA的功率， 并根据确定 的功率和可擦除式存储器存储的功率与电压的对应查找表， 确定 DC/DC的 输出电压值； 还用于采集声音、 图像或数据等信号， 并将采集到的信号进 行采样处理， 得到数字基带信号， 并将所述数字基带信号传输至 RFIC。  The BBIC is configured to determine a power of the PA according to a signal sent by the RFIC, and determine a DC/DC output voltage value according to the determined power and a corresponding lookup table of the power and voltage stored in the erasable memory; A signal such as sound, image or data is collected, and the acquired signal is sampled to obtain a digital baseband signal, and the digital baseband signal is transmitted to the RFIC.
所述 PA, 用于将收到的射频信号进行放大， 并将放大后的信号发送给 收发双工器。  The PA is configured to amplify the received RF signal and send the amplified signal to the transceiver duplexer.
所述 PMIC给 BBIC、 RFIC和 DC/DC提供恒定的电压。  The PMIC provides a constant voltage to BBIC, RFIC and DC/DC.
所述 DC/DC, 用于根据 BBIC确定的输出电压值向 PA输出电压。  The DC/DC is used to output a voltage to the PA according to the output voltage value determined by the BBIC.
该可擦除式存储器， 用于存储功率与电压的对应查找表。  The erasable memory is configured to store a corresponding lookup table of power and voltage.
上述功率与电压的对应查找表可以通过以下方法得到。  The corresponding power and voltage lookup table can be obtained by the following method.
预先测试一个 PA在不同的工作电压下，当 PA效率高时， PA的功率值， 将电压值和功率值对应存储， 得到对应数据， 并根据对应数据得到对应曲 线。  Pre-test a PA at different operating voltages. When the PA efficiency is high, the power value of the PA is stored correspondingly to the voltage value and the power value, and the corresponding data is obtained, and the corresponding curve is obtained according to the corresponding data.
例如， PA的额定工作电压 Vcc范围为 0.6~3.6v, 可以每隔 0.25v测量 一次， 当然间隔越小测试得到的对应数据越准确。  For example, the rated operating voltage of the PA Vcc ranges from 0.6 to 3.6v, which can be measured every 0.25v. Of course, the smaller the interval, the more accurate the corresponding data obtained by the test.
对多个 PA进行测试， 得到不同 PA的对应数据， 并根据各个对应数据 得到各个对应曲线。  Test multiple PAs to obtain corresponding data of different PAs, and obtain corresponding curves according to each corresponding data.
将得到的各个 PA的对应曲线进行拟合， 得到 PA效率高时， 电压和功 率的对应曲线， 如图 4所示。 因为不同批次、 不同厂家的 PA会有差别， 因 此将得到的多个 PA的对应数据进行拟合， 可以得到误差较小的数据， 使得 功率与电压的对应查找表更加准确。 The corresponding curves of the respective PAs were fitted to obtain a corresponding curve of voltage and power when the PA efficiency was high, as shown in FIG. 4 . Because different batches and different manufacturers have different PAs, By fitting the corresponding data of the plurality of PAs obtained, data with less error can be obtained, so that the corresponding lookup table of power and voltage is more accurate.
将所述曲线转化得出功率与电压的对应查找表。  The curve is converted to a corresponding lookup table of power and voltage.
所述功率与电压的对应查找表的结构如图 7所示， 功率和电压——对 应。  The structure of the power and voltage corresponding lookup table is as shown in Fig. 7, and the power and voltage are corresponding.
参见图 4所示的对应数据可知， 当 PA以较高的效率工作时， PA的功 率低， 相应的 PA的电压就低。 也就是说， PA功率降低时， 降低 PA的电压 会提高 PA的工作效率。图 6是本发明实施例中功率放大器工作效率的曲线 示意图， 通过与图 2进行对比可知， 采用本发明可以有效提高 PA的工作效 率。  Referring to the corresponding data shown in Fig. 4, when the PA operates at a higher efficiency, the power of the PA is low, and the voltage of the corresponding PA is low. In other words, when the PA power is reduced, lowering the voltage of the PA will increase the efficiency of the PA. FIG. 6 is a schematic diagram showing the working efficiency of the power amplifier in the embodiment of the present invention. By comparing with FIG. 2, it can be seen that the working efficiency of the PA can be effectively improved by using the present invention.
因为功率与电压的对应查找表中的功率与电压对应存储， 因此只要 Because the power and voltage in the corresponding lookup table of power and voltage are stored correspondingly, as long as
BBIC确定出 PA的功率，就能根据功率与电压的对应查找表得到 DC/DC的 输出电压值， PA采用得到的电压值工作就能获得高效率。 BBIC determines the power of the PA, and can obtain the DC/DC output voltage value according to the corresponding look-up table of power and voltage. The PA can obtain high efficiency by using the obtained voltage value.
下面对本发明的通信终端的工作原理进行介绍。  The working principle of the communication terminal of the present invention will be described below.
通信终端所发出的信号和接收到的信号强度是要求满足闭环的工作模 式， 即接收到的信号强度和发射的信号强度之和为一定值， 也就是说如果 接收到的信号强度很大， 那么通信终端的发射功率会比较小； 如果接收到 的信号强度很小， 那么通信终端的发射功率会比较大。 即， 当网络环境变 化时， 通信终端接收到的下行信号强度会随之变化， 为了保持通讯链路的 平衡， 通信终端会根据所收到的基站下行信号的强度来实时调整通信终端 上行信号的强度（就是调整输出的上行功率）， 基站信号越弱通信终端上行 的信号就越强。  The signal sent by the communication terminal and the received signal strength are required to satisfy the closed-loop operating mode, that is, the sum of the received signal strength and the transmitted signal strength is a certain value, that is, if the received signal strength is large, then The transmission power of the communication terminal will be relatively small; if the received signal strength is small, the transmission power of the communication terminal will be relatively large. That is, when the network environment changes, the downlink signal strength received by the communication terminal changes accordingly. In order to maintain the balance of the communication link, the communication terminal adjusts the uplink signal of the communication terminal in real time according to the received downlink signal strength of the base station. Intensity (that is, adjusting the uplink power of the output), the weaker the base station signal is, the stronger the signal of the uplink of the communication terminal is.
所述 BBIC采集声音、 图像或数据等信号， 并将采集到的信号进行采样 处理， 得到数字基带信号， 并将所述数字基带信号传输至 RFIC。  The BBIC collects signals such as sound, image or data, and samples the acquired signals to obtain a digital baseband signal, and transmits the digital baseband signal to the RFIC.
RFIC将收到的数字基带信号进行调制， 将数字基带信号调制加载到射 频信号上， 并发送给 PA。 The RFIC modulates the received digital baseband signal and applies the digital baseband signal modulation to the shot. The frequency signal is sent to the PA.
所述天线接收基站发来的信号， 并发给收发双工器。  The antenna receives a signal sent by the base station and sends it to the transceiver duplexer.
所述收发双工器将天线发来的信号发送给 RFIC。  The transceiver duplexer transmits a signal from the antenna to the RFIC.
RFIC将收发双工器发来的信号进行解调处理， 并将处理后的信号发给 BBIC。  The RFIC demodulates the signal sent from the duplexer and sends the processed signal to BBIC.
BBIC根据 RFIC发来的信号确定 PA的功率， 并根据确定的功率和可 擦除式存储器存储的功率与电压的对应查找表， 查找确定 DC/DC的输出电 压值。  The BBIC determines the power of the PA based on the signal from the RFIC and finds the output voltage value of the DC/DC based on the determined power and the corresponding lookup table of the power and voltage stored in the erasable memory.
所述 DC/DC根据 BBIC确定的输出电压值向 PA输出电压。  The DC/DC outputs a voltage to the PA according to the output voltage value determined by BBIC.
所述 PA根据收到的电压进行工作， 将收到的射频信号进行放大， 并将 放大后的信号发送给收发双工器。  The PA operates according to the received voltage, amplifies the received RF signal, and transmits the amplified signal to the transceiver duplexer.
所述收发双工器滤除 PA发来的信号中的谐波，并将处理后的信号发送 给天线。  The transceiver duplexer filters out harmonics in the signal from the PA and sends the processed signal to the antenna.
所述天线将收发双工器发来的信号发送出去。  The antenna transmits a signal sent from the transceiver duplexer.
本发明中， PMIC不直接为 PA提供电压，而是经由 DC/DC为 PA供电， 并由 BBIC根据 PA的输出功率大小不同来控制 DC/DC的使能， 动态调整 DC/DC的输出电压 Vcc, 使 PA始终保持在最佳的工作状态。  In the present invention, the PMIC does not directly supply voltage to the PA, but supplies power to the PA via DC/DC, and the BBIC controls the DC/DC enable according to the output power of the PA, and dynamically adjusts the DC/DC output voltage Vcc. , so that the PA is always in the best working condition.
本发明技术方案可有效的提高 PA工作在中低功率模式下的工作效率， 降低终端的功耗， 延长终端产品电池的续航时间， 提高用户体验效果。  The technical scheme of the invention can effectively improve the working efficiency of the PA working in the medium and low power mode, reduce the power consumption of the terminal, prolong the battery life of the terminal product, and improve the user experience.
本发明提供的通信终端是一种移动宽带无线终端产品， 所述移动宽带 无线终端产品可以包括：  The communication terminal provided by the present invention is a mobile broadband wireless terminal product, and the mobile broadband wireless terminal product may include:
所述 BBIC, 能够处理接收到的控制指令， 并能对整个终端的工作状态 进行控制。  The BBIC is capable of processing the received control commands and is capable of controlling the operating state of the entire terminal.
所述 RFIC, 用于对通信信号进行解调和调制。  The RFIC is configured to demodulate and modulate a communication signal.
所述 PA, 用于放大 RFIC调制后的信号， 再通过天线发射出去。 所述 DC/DC, 用于动态输出保证 PA正常工作的稳定的电压。 The PA is used to amplify the signal modulated by the RFIC and then transmitted through the antenna. The DC/DC is used for dynamic output to ensure a stable voltage for the normal operation of the PA.
该可擦除式存储器， 用于存放终端在工作过程中所需要的软件以及数 据。  The erasable memory is used to store software and data required by the terminal during operation.
下面对在上述通信终端上实现提高功率放大器工作效率的方法进行介 绍。  Next, a method for improving the operating efficiency of the power amplifier on the above communication terminal will be described.
该方法包括：预先测试在不同的工作电压下 PA输出功率和效率的对应 数据， 该数据需要批量测试统计， 尽可能多的进行数据采样。  The method includes: pre-testing corresponding data of PA output power and efficiency under different working voltages, the data needs batch test statistics, and data sampling is performed as much as possible.
把统计出的测试数据拟合出一组在不同的工作电压下， PA输出功率和 最佳效率的对应曲线。  The statistical test data is fitted to a set of corresponding curves of PA output power and optimum efficiency at different operating voltages.
通过该曲线可确定出在 PA工作在的最佳效率时，输出功率和工作电压 之间建立一种对应关系， 并把该对应数据以查找表的方式存入可擦除式存 储器， 所述查找表的结构如图 6所示。 得到查找表的重点是测试得到电压 功率曲线后， 按照实际得到的数据进行拟合， 把拟合后的曲线转换成表格 后得到的。 对于 PA不同的输出功率， 会有不同的供电电压， 两者可以—— 对应起来。 根据电压对功率曲线整理出一个对应的表格。  Through the curve, it can be determined that when the optimal efficiency of the PA is working, a correspondence relationship between the output power and the operating voltage is established, and the corresponding data is stored in the erasable memory in a lookup table, the searching The structure of the table is shown in Figure 6. The focus of the lookup table is to test the voltage power curve, and then fit the data according to the actual data, and convert the fitted curve into a table. For different output powers of the PA, there will be different supply voltages, and the two can be - corresponding. A corresponding table is compiled according to the voltage versus power curve.
在某一个功率等级时， 调用该功率等级下所对应的电压数据信息， 控 制 DC/DC输出对应的电压值， 保证 PA在整个的功能过滤范围内效率达到 最佳状态。  At a certain power level, the voltage data corresponding to the power level is called, and the voltage value corresponding to the DC/DC output is controlled to ensure that the efficiency of the PA is optimal in the entire functional filtering range.
图 5是本发明提高通信终端的功率放大器工作效率的方法的示意图， 参考图 5所示， 所述方法包括如下步驟：  FIG. 5 is a schematic diagram of a method for improving the working efficiency of a power amplifier of a communication terminal according to the present invention. Referring to FIG. 5, the method includes the following steps:
步驟 501 : 对传统的电路进行改进， 在电路设计中新增了一个 DC/DC; 所述 DC/DC单独给 PA进行供电， 替换传统的由 PMIC供电模式。 步驟 502: 统计出在整个功率动态范围内， 各功率点所对应效率到最佳 时的电压数据；  Step 501: The conventional circuit is improved, and a DC/DC is added in the circuit design; the DC/DC supplies power to the PA separately, replacing the traditional PMIC power supply mode. Step 502: Calculate voltage data when the efficiency corresponding to each power point is optimal in the entire power dynamic range;
测试 PA在额定工作电压 Vcc范围内 （比如 0.6~3.6V范围内， 步距为 0.2V ), 其在整个功率动态范围内 （比如 -10dBm~28dBm, 步距为 ldB ) 的 效率曲线， 以此统计出在整个功率的动态范围内， 各功率点所对应效率达 到最佳时的电压数据。 Test the PA within the rated working voltage Vcc (such as 0.6~3.6V, the step is 0.2V), its efficiency curve over the entire power dynamic range (such as -10dBm~28dBm, step size is ldB), which is used to calculate the optimum efficiency of each power point within the dynamic range of the entire power. Voltage data.
步驟 503: 根据步驟 402所统计的数据， 以概率统计拟合出一个最佳工 作效率时的 PA输出功率和工作电压的对应关系曲线；  Step 503: According to the data collected in step 402, the corresponding relationship between the PA output power and the working voltage when the optimal working efficiency is fitted by probability statistics;
所述关系曲线如图 4所示。  The relationship curve is shown in Figure 4.
步驟 504: 以所述曲线再制作出一个 PA输出功率和工作电压的对应关 系表；  Step 504: Reproduce a correspondence table between the PA output power and the working voltage by using the curve;
并把功率和电压编译成对应的数据信息， 这样会形成一个电压和功率 的对应信息表， 存于可擦除式存储器中， 如图 7所示。  The power and voltage are compiled into corresponding data information, which forms a corresponding information table of voltage and power, which is stored in the erasable memory, as shown in FIG.
步驟 505: 在 BBIC调用功率存储信息时， 同时调用对应的电压信息， 控制 DC/DC, 使 DC/DC的输出电压调整到期望电压值。  Step 505: When the power storage information is called by the BBIC, the corresponding voltage information is simultaneously called, and the DC/DC is controlled to adjust the output voltage of the DC/DC to the desired voltage value.
DC/DC的输出电压调整到期望电压值时， 使 PA工作在最佳效率状态， 降低 PA功耗。  When the output voltage of the DC/DC is adjusted to the desired voltage value, the PA operates at the optimum efficiency state and reduces the PA power consumption.
在用户实际使用时， 由于通信链路必须遵从上下行链路对称的对应关 系， 因此随着网络环境的变化， 终端接收到的下行信号也在变化， 终端输 出的上行功率会在故相应的实时调整。  When the user actually uses the communication link, the communication link must comply with the symmetric relationship between the uplink and downlink. Therefore, as the network environment changes, the downlink signal received by the terminal also changes, and the uplink power output by the terminal will be in real time. Adjustment.
具体的， BBIC会并根据收到的下行信号强度判断网络状态， 计算出该 状态下 PA所需要输出的信号强度， 并同时调用预先存储的 PA所需要的功 率信息， 电压和功率的对应信息表， 使 PA输出功率达到所要求的范围； 同 时调用该功率信息对应的 DC/DC电压信息， 调整 DC/DC输出电压 Vcc, 使 PA满足工作在最佳的效率状态， 从而达到降低功耗， 延长终端电池续航 时间， 降低终端的发热， 提高了用户的体验。  Specifically, the BBIC determines the network state according to the received downlink signal strength, calculates the signal strength that the PA needs to output in the state, and simultaneously calls the power information required for the pre-stored PA, and the corresponding information table of the voltage and the power. , so that the PA output power reaches the required range; at the same time, the DC/DC voltage information corresponding to the power information is called, and the DC/DC output voltage Vcc is adjusted, so that the PA satisfies the optimal efficiency state, thereby reducing power consumption and extending The battery life of the terminal reduces the heating of the terminal and improves the user experience.
与现有技术相比， 本发明能最大限度的提高 PA的工作效率， 有效的延 长产品电池的续航时间， 降低终端产品的发热问题， 提高用户体验的满意 度。 Compared with the prior art, the invention can maximize the working efficiency of the PA, effectively extend the battery life of the product, reduce the heating problem of the terminal product, and improve the satisfaction of the user experience. Degree.
当然， 本发明还可有多种实施方式， 在不背离本发明精神及其实质的 情况， 熟悉本领域的技术人员当可根据本发明做出各种相应的更改或变化， 但凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进， 均应 包含在本发明的保护范围之内。  There are a variety of embodiments of the present invention, and various modifications and changes can be made thereto in accordance with the present invention without departing from the spirit and scope of the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles are intended to be included within the scope of the present invention.

Claims

权利要求书 Claim
1、 一种提高通信终端功率放大器工作效率的方法， 其特征在于， 在通 信终端中增加直流电压转换 DC/DC; 测试并统计在不同的工作电压下的功 率放大器 PA输出功率和效率数据； 根据所述 PA输出功率和效率数据， 确 定 PA工作在最佳效率时， 输出功率和工作电压的对应关系； 巴所述对应关 系的数据存储； 当 PA工作在某一个功率等级时， 调用上述对应关系中该功 率等级下所对应的电压数据信息， 控制 DC/DC输出对应的电压值。  1. A method for improving the working efficiency of a power amplifier of a communication terminal, characterized in that a DC voltage conversion DC/DC is added in a communication terminal; and a power amplifier PA output power and efficiency data at different operating voltages are tested and counted; The PA output power and efficiency data determine the correspondence between the output power and the working voltage when the PA works at the optimal efficiency; the data storage corresponding to the correspondence relationship; when the PA works at a certain power level, the corresponding relationship is invoked The voltage data information corresponding to the power level controls the voltage value corresponding to the DC/DC output.
2、 如权利要求 1所述的方法， 其特征在于， 将所述统计出的测试数据 拟合出一组在 PA在不同的工作电压下， 输出功率和最佳效率的对应曲线， 通过该曲线确定出在 PA工作在最佳效率时 ,输出功率和工作电压之间的对 应关系。  2. The method according to claim 1, wherein the statistical test data is fitted to a set of corresponding curves of the output power and the optimal efficiency at different operating voltages of the PA, and the curve is adopted. Determine the correspondence between output power and operating voltage when the PA is operating at optimum efficiency.
3、 如权利要求 2所述的方法， 其特征在于， 所述拟合出输出功率和最 佳效率的对应曲线为： PA在额定工作电压范围内， 在整个功率动态范围内 的效率曲线， 以此统计出在整个功率的动态范围内， 各功率点所对应效率 达到最佳时的电压数据。  3. The method according to claim 2, wherein the corresponding curve for fitting the output power and the optimal efficiency is: an efficiency curve of the PA within the rated operating voltage range over the entire power dynamic range, This counts the voltage data at the optimum power efficiency of each power point within the dynamic range of the entire power.
4、 如权利要求 3所述的方法， 其特征在于， 根据所述统计出的功率点 对应效率达到最佳的电压数据， 以概率统计拟合出一个最佳工作效率时的 PA输出功率和工作电压的对应关系曲线；  The method according to claim 3, wherein the optimal voltage data is achieved according to the calculated power point corresponding efficiency, and the PA output power and the work when the optimal working efficiency is fitted by probability statistics Corresponding relationship curve of voltage;
以所述曲线制作 PA输出功率和工作电压的对应关系表；  Making a correspondence table between the PA output power and the operating voltage by using the curve;
将功率和电压编译成对应的数据信息， 形成一个电压和功率的对应信 息表。  The power and voltage are compiled into corresponding data information to form a corresponding information table of voltage and power.
5、 如权利要求 1所述的方法， 其特征在于， 所述 DC/DC单独给 PA进 行供电。  5. The method of claim 1 wherein said DC/DC separately supplies power to the PA.
6、 一种通信终端， 其特征在于， 所述通信终端包括基带芯片 BBIC、 射频芯片 RFIC、 功率放大器 PA、 DC/DC和可擦除式存储器； 所述 BBIC, 处理接收到的控制指令， 并对整个终端的工作状态进行控 制； 6. A communication terminal, comprising: a baseband chip BBIC, a radio frequency chip RFIC, a power amplifier PA, a DC/DC, and an erasable memory; The BBIC processes the received control command and controls the working state of the entire terminal;
所述 RFIC, 对通信信号进行解调和调制；  The RFIC demodulates and modulates a communication signal;
所述 PA, 放大 RFIC调制后的信号；  The PA amplifies the signal modulated by the RFIC;
所述 DC/DC, 在相应的范围内动态输出稳定的电压；  The DC/DC dynamically outputs a stable voltage within a corresponding range;
所述可擦除式存储器， 存储一个电压和功率的对应信息表， 记录当功 率 PA在最佳效率时， 输出功率和工作电压的对应关系数据。  The erasable memory stores a corresponding information table of voltage and power, and records corresponding data of the output power and the operating voltage when the power PA is at the optimum efficiency.
7、 如权利要求 6所述的通信终端， 其特征在于， 所述输出功率和工作 电压的对应关系数据通过如下方式获取： 测试并统计在不同的工作电压下 的 PA输出功率和效率数据； 根据所述 PA输出功率和效率数据， 确定 PA 工作在最佳效率时， 输出功率和工作电压的对应关系。  7. The communication terminal according to claim 6, wherein the correspondence data of the output power and the operating voltage is obtained by: testing and counting PA output power and efficiency data at different operating voltages; The PA output power and efficiency data determine the correspondence between the output power and the operating voltage when the PA operates at the optimum efficiency.
8、 如权利要求 7所述的通信终端， 其特征在于， 当所述 PA工作在某 一个功率等级时， 通信终端调用所述输出功率和工作电压的对应关系中该 功率等级下所对应的电压数据信息， 控制 DC/DC输出对应的电压值。  The communication terminal according to claim 7, wherein when the PA operates at a certain power level, the communication terminal invokes a voltage corresponding to the power level in a correspondence between the output power and the operating voltage. Data information, which controls the voltage value corresponding to the DC/DC output.
9、 如权利要求 7所述的通信终端， 其特征在于， 将所述统计出的测试 数据拟合出一组在 PA在不同的工作电压下，输出功率和最佳效率的对应曲 线， 通过该曲线确定出在 PA工作在最佳效率时， 输出功率和工作电压之间 的对应关系。  9. The communication terminal according to claim 7, wherein the statistical test data is fitted to a set of corresponding curves of output power and optimal efficiency at different operating voltages of the PA, The curve determines the correspondence between output power and operating voltage when the PA is operating at optimum efficiency.
10、 如权利要求 9所述的通信终端， 其特征在于， 根据所述统计出的 功率点对应效率达到最佳的电压数据， 以概率统计拟合出一个最佳工作效 率时的 PA输出功率和工作电压的对应关系曲线；  The communication terminal according to claim 9, wherein the optimal power data is achieved according to the calculated power point corresponding efficiency, and the PA output power and the optimal working efficiency are fitted by probability statistics. Corresponding relationship curve of working voltage;
以所述曲线制作 PA输出功率和工作电压的对应关系表；  Making a correspondence table between the PA output power and the operating voltage by using the curve;
将功率和电压编译成对应的数据信息， 形成所述电压和功率的对应信 息表。  The power and voltage are compiled into corresponding data information to form a corresponding information table of the voltage and power.
11、 一种提高通信终端功率放大器工作效率的方法， 其特征在于， 所 述方法包括： 11. A method for improving the working efficiency of a power amplifier of a communication terminal, characterized in that The methods include:
根据收到的下行信号确定 PA的功率；  Determining the power of the PA according to the received downlink signal;
根据确定的功率和预先存储的功率与电压的对应查找表， 查找确定输 出电压值；  Finding and determining the output voltage value according to the determined power and the pre-stored corresponding power and voltage lookup table;
根据确定的输出电压值向 PA输出电压；  Outputting a voltage to the PA according to the determined output voltage value;
所述 PA根据收到的电压进行工作。  The PA operates in accordance with the received voltage.
12、 一种通信终端， 其特征在于， 所述通信终端包括： 控制单元、 供 电单元和 PA, 其中，  A communication terminal, comprising: a control unit, a power supply unit, and a PA, wherein
所述控制单元， 用于根据收到的下行信号确定 PA的功率； 并根据确定 的功率和预先存储的功率与电压的对应查找表， 查找确定供电单元的输出 电压值；  The control unit is configured to determine a power of the PA according to the received downlink signal; and determine, according to the determined power and a pre-stored corresponding power and voltage lookup table, the output voltage value of the power supply unit is determined;
所述供电单元， 用于根据确定的输出电压值向 PA输出电压； 所述 PA, 用于根据收到的电压进行工作。  The power supply unit is configured to output a voltage to the PA according to the determined output voltage value; and the PA is configured to operate according to the received voltage.
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