WO2013113239A1 - 进行功率调整的手机及其功率调整方法 - Google Patents

进行功率调整的手机及其功率调整方法 Download PDF

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WO2013113239A1
WO2013113239A1 PCT/CN2012/087407 CN2012087407W WO2013113239A1 WO 2013113239 A1 WO2013113239 A1 WO 2013113239A1 CN 2012087407 W CN2012087407 W CN 2012087407W WO 2013113239 A1 WO2013113239 A1 WO 2013113239A1
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power
output power
radio frequency
received
maximum
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PCT/CN2012/087407
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English (en)
French (fr)
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潘灵建
严震辉
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惠州Tcl移动通信有限公司
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Priority to ES12867575.8T priority Critical patent/ES2613870T3/es
Priority to EP12867575.8A priority patent/EP2811788B1/en
Priority to US14/363,003 priority patent/US9241313B2/en
Publication of WO2013113239A1 publication Critical patent/WO2013113239A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular to a mobile phone for power adjustment and a power adjustment method thereof.
  • Electromagnetic wave absorption rate is commonly used in biological dosimetry (Specific Absorption Rate (SAR) is used to characterize this physical process.
  • electromagnetic wave absorption rate is the electromagnetic power absorbed or consumed by human tissue per unit mass, in watts/kg.
  • the mobile phone When the mobile phone is in use, it will radiate a large amount of electromagnetic waves. Moreover, when using a mobile phone, the mobile phone is often placed next to the ear, and long-term use will cause brain dysfunction and affect human health. Therefore, the mobile phone must pass the electromagnetic wave absorption rate test before leaving the factory.
  • the electromagnetic wave absorption rate test mainly involves placing the mobile phone at a distance of 2-3 cm from the face of the human face, and detecting the electromagnetic wave absorption rate at this time.
  • Table 1 Antenna radiated power RF power amplifier maximum output power RF power amplifier DAC value Electromagnetic wave absorption rate data 28.2dBm 33dBm 580 1.2W/Kg standard 28dBm 33 ⁇ 2dBm ⁇ 1023 1.0W/Kg
  • the antenna radiated power of the GSM850 band is 28.2 dBm
  • the standard is greater than 28 dBm
  • the electromagnetic wave absorptivity is 1.0 W/Kg, but the electromagnetic wave absorptivity of the GSM850 has reached 1.2 W/Kg.
  • the radiation power of the mobile phone antenna is directly related to the electromagnetic wave absorption rate, the higher the radiation power of the antenna, the higher the electromagnetic wave absorption rate. Therefore, one of the ways to reduce the electromagnetic wave absorption rate is to reduce the radiation power of the antenna. Therefore, it can be directly reduced.
  • the output power of the RF power amplifier is such that the antenna radiated power is reduced, thereby reducing the electromagnetic wave absorption rate.
  • the radiated power of the antenna is also simultaneously reduced. If the maximum output power of the RF power amplifier is reduced to 32dBm, the antenna radiated power will also be reduced by about 1dBm at the same time, so that when the antenna radiated power is tested in the free space state, the index cannot be reached.
  • the electromagnetic wave absorption rate test when the mobile phone is tested, when the antenna radiation power is up to standard, greater than 28dBm, when the electromagnetic wave absorption rate test is performed, the electromagnetic wave absorption rate will exceed the standard, reaching 1.2W/Kg. At this time, it is impossible to directly reduce the RF.
  • the method of output power of the power amplifier is to simultaneously achieve the antenna radiation power test and the electromagnetic wave absorptivity test simultaneously.
  • the technical problem to be solved by the present invention is to provide a mobile phone for power adjustment and a power adjustment method thereof, so that the mobile phone can simultaneously meet the requirements of electromagnetic wave absorptivity test and antenna radiation power test.
  • a technical solution adopted by the present invention is to provide a power adjustment method for a mobile phone, which includes the following steps: a. When establishing a call, determining whether a maximum power transmission instruction from the base station is received; b. When it is determined that the maximum power transmission instruction from the base station is received, determining whether an interruption signal sent by the distance sensor is received, wherein the distance sensor issues the interruption when the distance between the mobile phone and the human face is within a predetermined distance range a signal, the predetermined distance ranging from 0 to 3 cm; c.
  • the maximum output power of the radio frequency power amplifier is set to be the first output power, and when it is determined that the interrupt signal is received, the maximum output power of the radio frequency power amplifier is set to the second output power.
  • the first output power is greater than the second output power, the first output power is 33 dBm, and the second output power is 32 dBm; d.
  • the RF power amplifier is controlled to output a radio frequency signal at the maximum output power.
  • the step b further includes: when it is determined that the maximum power transmission instruction from the base station is not received, controlling the radio frequency power amplifier to output the radio frequency signal in a normal call.
  • a technical solution adopted by the present invention is to provide a power adjustment method for a mobile phone, including the following steps: a. When establishing a call, determining whether a maximum power transmission instruction from the base station is received; b. When it is determined that the maximum power transmission instruction from the base station is received, it is determined whether an interrupt signal sent by the distance sensor is received, wherein the distance sensor sends an interrupt signal when the distance between the mobile phone and the human face is within a predetermined distance; c.
  • the maximum output power of the RF power amplifier is set to be the first output power, and when it is determined that the interrupt signal is received, the maximum output power of the RF power amplifier is set to the second output power, wherein An output power is greater than the second output power; d. Controls the RF power amplifier to output RF signals at maximum output power.
  • the step b further includes: when determining that the maximum power transmission instruction from the base station is not received, controlling the radio frequency power amplifier to output the radio frequency signal at the power required for normal conversation.
  • the predetermined distance ranges from 0 to 3 cm.
  • the first output power is 33 dBm, and the second output power is 32 dBm.
  • the DAC parameter of the radio frequency power amplifier is set to 580 such that the first output power of the radio frequency power amplifier is 33 dBm, and the DAC parameter of the radio frequency power amplifier is set to 560.
  • the second output power of the RF power amplifier is 32 dBm.
  • a technical solution adopted by the present invention is to provide a mobile phone, comprising: a radio frequency power amplifier, which outputs an RF signal; and a distance sensor, which interrupts when the distance between the mobile phone and the human face is within a predetermined distance.
  • a signal a baseband signal processing chip, respectively connected to the distance sensor and the radio frequency power amplifier, determining whether to receive the maximum power transmission instruction from the base station when establishing a call, and determining to receive the maximum power transmission instruction from the base station And determining whether the interrupt signal sent by the distance sensor is received, and determining that the interrupt signal is not received, setting a maximum output power of the radio frequency power amplifier as the first output power, and determining that the interrupt signal is received And setting a maximum output power of the radio frequency power amplifier to a second output power, wherein the first output power is greater than the second output power, and controlling the radio frequency power amplifier to output the radio frequency signal at the maximum output power .
  • the baseband signal processing chip controls the radio frequency power amplifier to output the radio frequency signal in a normal call power when it determines that the maximum power transmission instruction from the base station is not received.
  • the predetermined distance ranges from 0 to 3 cm.
  • the first output power is 33 dBm, and the second output power is 32 dBm.
  • the baseband signal processing chip sets the DAC parameter of the radio frequency power amplifier to 580 such that the first output power of the radio frequency power amplifier is 33 dBm, and the DAC parameter of the radio frequency power amplifier is set to 560.
  • the second output power of the RF power amplifier is 32 dBm.
  • the present invention determines whether the current test is an electromagnetic wave absorptivity test or an antenna radiated power test by determining whether an interrupt signal of the distance sensor is received, and the distance sensor is not received.
  • the interrupt signal determines that the current test is the antenna radiated power test
  • the control RF power amplifier outputs the radio frequency signal with the first output power as the maximum output power to ensure the radiation power test through the antenna, and determines that the current test is when receiving the interrupt signal of the distance sensor.
  • the electromagnetic wave absorptivity test controls the radio frequency power amplifier to output the radio frequency signal with the second output power smaller than the first output power as the maximum output power to ensure the electromagnetic wave absorptivity test, so that the mobile phone can simultaneously satisfy the electromagnetic wave absorptivity test and the antenna radiated power test. Requirements.
  • FIG. 1 is a schematic diagram showing the circuit structure of a mobile phone according to a first embodiment of the present invention
  • FIG. 2 is a flow chart of a power adjustment method of a mobile phone according to a first embodiment of the present invention.
  • FIG. 1 is a schematic diagram showing the circuit structure of a mobile phone according to a first embodiment of the present invention.
  • the mobile phone of the present invention includes a radio frequency power amplifier 201, a distance sensor 202, and a baseband signal processing chip 203.
  • the baseband signal processing chip 203 is connected to the radio frequency power amplifier 201 for setting the maximum power output value of the radio frequency power amplifier 201, and the baseband signal processing chip 203 is connected to the distance sensor 202 for acquiring the interrupt signal generated by the distance sensor 202. .
  • two DAC parameters are set by the baseband signal processing chip 203 to control the maximum output power of the radio frequency power amplifier 201.
  • the DAC parameter is a setting parameter of the RF power amplifier 201 for setting the maximum output power of the RF power amplifier 201.
  • the baseband signal processing chip 203 sets the DAC parameter of the radio frequency power amplifier 201 to 580 such that the maximum output power of the radio frequency power amplifier 201 is the first output power of 33 dBm, and the DAC parameter of the radio frequency power amplifier 201 is set to 560. So that the maximum output power of the RF power amplifier 201 is the second output power of 32 dBm.
  • the distance sensor 202 is used to detect whether the mobile phone is close to the human face, thereby issuing an interrupt signal to the baseband signal processing chip 203 when it is determined that the mobile phone is close to the human face.
  • the baseband signal processing chip 203 sets the radio frequency power amplifier 201 to output a radio frequency signal with a smaller maximum output power.
  • the base station sends a maximum power transmission command to the mobile phone once the call is established.
  • the mobile phone outputs the radio frequency signal (ie, 33 ⁇ 2dBm) at the maximum output power. Therefore, when the maximum power transmission command of the base station is not received, it indicates that the above test is not performed at this time, and the baseband signal processing chip 203 controls the radio frequency power amplifier.
  • the 201 outputs a radio frequency signal at a power required for a normal call.
  • the baseband signal processing chip 203 When the baseband signal processing chip 203 receives the maximum power transmission instruction, the baseband signal processing chip 203 further determines whether the interruption signal of the distance sensor 202 is received. Since the antenna radiation power test does not need to bring the mobile phone close to the human face, the interrupt signal is not received.
  • the current test is an antenna radiation power test, and the baseband signal processing chip 203 uses a first DAC parameter 580 to control the maximum output power of the RF power amplifier 201 to be a first output power of 33 dBm. In this case, the antenna The radiated power will reach 28.2dBm, which is up to standard.
  • the baseband signal processing chip 203 When the baseband signal processing chip 203 receives the interrupt signal from the distance sensor 202, since the electromagnetic wave absorptivity test requires the mobile phone to be close to the human face so that the distance sensor 202 generates an interrupt signal, in this case, it can be determined that the electromagnetic wave absorptivity is currently being performed. Test, so the second DAC parameter 560 is used to control the second output power of the RF power amplifier 201 to be 32 dBm.
  • the RF power amplifier 201 uses the second output power of 32 dBm as the maximum output power, The maximum output power is reduced by 1dBm, resulting in the original 1.2W/Kg electromagnetic wave absorption rate being reduced to about 0.9W/Kg, thus achieving compliance.
  • FIG. 2 is a flowchart of a method for adjusting power of a mobile phone according to a first embodiment of the present invention. As shown in FIG. 2, the power adjustment method of the mobile phone of the present invention includes the following steps:
  • Step 101 When establishing a call, determine whether a maximum power transmission instruction from the base station is received. If the determination result is “Yes”, step 103 is performed; otherwise, step 102 is performed.
  • Step 102 Control the radio frequency power amplifier 201 to output a radio frequency signal with the power required during normal conversation.
  • Step 103 It is determined whether the interrupt signal sent by the distance sensor 202 is received. When the determination result is “Yes”, step 104 is performed. Otherwise, step 105 is performed, wherein the distance sensor 202 is within a predetermined distance range between the mobile phone and the human face.
  • the interrupt signal is internally generated, and a predetermined distance can be set on the distance sensor 202 as needed, which is preferably set between 0 and 3 centimeters depending on the actual application.
  • Step 104 Set the maximum output power of the RF power amplifier 201 to the second output power.
  • Step 105 The maximum output power of the RF power amplifier 201 is set to be a first output power, where the first output power is greater than the second output power;
  • Step 106 Control the RF power amplifier 201 to output a radio frequency signal at a maximum output power.
  • the first output power can be set to 33 dBm
  • the second output power can be set to 32 dBm.
  • the DAC parameter of the RF power amplifier 201 is set to 580 such that the first output power of the RF power amplifier 201 is 33 dBm
  • the DAC parameter of the RF power amplifier 201 is set to 560 such that the second output power of the RF power amplifier 201 is 32 dBm.
  • the above steps 101-106 are all performed by the baseband signal processing chip 203.
  • the specific values of the DAC parameters, the antenna radiant power standard value, the first output power, the second output power, and the electromagnetic wave standard value may be adjusted according to actual needs, and the present invention only takes a specific embodiment as an example.
  • the above specific numerical values are not specifically limited without departing from the inventive concept.
  • the present invention determines whether the current test is an electromagnetic wave absorptivity test or an antenna radiated power test by determining whether the interrupt signal of the distance sensor 202 is received, and determines that the current test is the antenna radiated power when the interrupt signal of the distance sensor 202 is not received.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)
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Abstract

本发明公开了一种进行功率调整的手机及其功率调整方法。其中，所述方法包括如下步骤：a. 在建立通话时，判断是否接收到来自基站的最大功率发送指令；b. 在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的中断信号，其中，所述距离传感器在所述手机与人脸的距离在预定距离范围内时发出所述中断信号，所述预定距离范围在0到3厘米之间；c. 在判断到没有接收到所述中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到所述中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，所述第一输出功率大于所述第二输出功率，所述第一输出功率为33dBm，所述第二输出功率为32dBm；d．控制所述射频功率放大器以所述最大输出功率输出射频信号。使得手机能同时满足电磁波吸收率测试和天线辐射功率测试的要求。

Description

进行功率调整的手机及其功率调整方法
【技术领域】
本发明涉及通讯领域，特别是涉及一种进行功率调整的手机及其功率调整方法。
【背景技术】
由于人体中的各种器官均为有耗介质，因此人体体内电磁场会产生电流，导致吸收和耗散电磁能量，生物剂量学中常用电磁波吸收率（Specific Absorption Rate，简称SAR）来表征这一物理过程。
电磁波吸收率的意义为单位质量的人体组织所吸收或消耗的电磁功率，单位为瓦/千克。
手机在使用过程中，会向外辐射大量的电磁波，而且，使用手机通话时，手机常常被放在耳朵旁边，长期使用将会导致大脑功能紊乱，影响人体健康。因此，手机在出厂前必须通过电磁波吸收率测试。
现今，电磁波吸收率测试主要是将手机放到距离人脸2-3厘米处，检测此时的电磁波吸收率。
首先结合表1对现有的GSM850频段天线的各项数据作出说明。
表1 ：
天线辐射功率 射频功率放大器最大输出功率 射频功率放大器 DAC 值 电磁波吸收率
数据 28.2dBm 33dBm 580 1.2W/Kg
标准 28dBm 33 ± 2dBm <1023 1.0W/Kg
如表1中所示，GSM850频段的天线辐射功率为28.2dBm，标准是大于28dBm，电磁波吸收率的指标为1.0W/Kg，但是GSM850的电磁波吸收率已经达到1.2W/Kg。
由于手机天线的辐射功率和电磁波吸收率是有直接关系的，天线辐射功率越大，电磁波吸收率就越高，所以降低电磁波吸收率的途径之一就是降低天线辐射功率，因此，可以直接通过降低射频功率放大器的输出功率以使得天线辐射功率降低，从而降低电磁波吸收率。
但是由此会产生一个问题，就是当射频功率放大器的最大输出功率降低的时候，天线的辐射功率也会同步降低。若将射频功率放大器的最大输出功率降低到32dBm，此时天线辐射功率也会同时降低1dBm左右，这样当在自由空间状态下测试天线辐射功率时，就无法达到指标。
因此，在对手机进行相关测试时，当天线辐射功率调试达标，大于28dBm时，在进行电磁波吸收率测试时，会发现电磁波吸收率超标，达到1.2W/Kg，此时，无法采用直接降低射频功率放大器的输出功率的方法来同时使得天线辐射功率测试和电磁波吸收率测试同时达标。
【发明内容】
本发明主要解决的技术问题是提供一种进行功率调整的手机及其功率调整方法，使得手机能同时满足电磁波吸收率测试和天线辐射功率测试的要求。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种手机的功率调整方法，其中，包括如下步骤：a. 在建立通话时，判断是否接收到来自基站的最大功率发送指令；b. 在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的中断信号，其中，所述距离传感器在所述手机与人脸的距离在预定距离范围内时发出所述中断信号，所述预定距离范围在0到3厘米之间；c. 在判断到没有接收到所述中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到所述中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，所述第一输出功率大于所述第二输出功率，所述第一输出功率为33dBm，所述第二输出功率为32dBm；d．控制所述射频功率放大器以所述最大输出功率输出射频信号。
其中，所述步骤b进一步包括：在判断到没有接收到来自基站的最大功率发送指令时，控制所述射频功率放大器的以正常通话时所需功率输出射频信号。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种手机的功率调整方法，包括如下步骤：a. 在建立通话时，判断是否接收到来自基站的最大功率发送指令；b. 在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的中断信号，其中，距离传感器在手机与人脸的距离在预定距离范围内时发出中断信号； c. 在判断到没有接收到中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，第一输出功率大于第二输出功率；d．控制射频功率放大器以最大输出功率输出射频信号。
其中，步骤b进一步包括：在判断到没有接收到来自基站的最大功率发送指令时，控制射频功率放大器的以正常通话时所需功率输出射频信号。
其中，所述预定距离范围在0到3厘米之间。
其中，所述第一输出功率为33dBm，所述第二输出功率为32dBm。
其中，在所述步骤c中，通过设置所述射频功率放大器的DAC参数为580以使得所述射频功率放大器的第一输出功率为33dBm，通过设置所述射频功率放大器的DAC参数为560以使得所述射频功率放大器的第二输出功率为32dBm。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种手机，包括：射频功率放大器，输出射频信号；距离传感器，在所述手机与人脸的距离在预定距离范围内时发出中断信号；基带信号处理芯片，分别与所述距离传感器以及所述射频功率放大器连接，在建立通话时，判断是否接收到来自基站的最大功率发送指令，在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的所述中断信号，在判断到没有接收到所述中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到所述中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，所述第一输出功率大于所述第二输出功率，并控制所述射频功率放大器以所述最大输出功率输出所述射频信号。
其中，所述基带信号处理芯片在判断到没有接收到来自基站的最大功率发送指令时，控制所述射频功率放大器的以正常通话时所需功率输出所述射频信号。
其中，所述预定距离范围在0到3厘米之间。
其中，所述第一输出功率为33dBm，所述第二输出功率为32dBm。
其中，所述基带信号处理芯片通过设置所述射频功率放大器的DAC参数为580以使得所述射频功率放大器的第一输出功率为33dBm，通过设置所述射频功率放大器的DAC参数为560以使得所述射频功率放大器的第二输出功率为32dBm。
本发明的有益效果是：区别于现有技术的情况，本发明通过判断是否接收到距离传感器的中断信号，以判定当前所作测试为电磁波吸收率测试或天线辐射功率测试，在没有接收到距离传感器的中断信号时判定当前测试为天线辐射功率测试，控制射频功率放大器以第一输出功率作为最大输出功率输出射频信号以确保通过天线辐射功率测试，在接收到距离传感器的中断信号时判定当前测试为电磁波吸收率测试，控制射频功率放大器以小于第一输出功率的第二输出功率作为最大输出功率输出射频信号以确保通过电磁波吸收率测试，从而使得手机能同时满足电磁波吸收率测试和天线辐射功率测试的要求。
【附图说明】
图1是根据本发明第一实施例的手机的电路结构示意图；
图2是根据本发明第一实施例的手机的功率调整方法的流程图。
【具体实施方式】
下面结合附图和实施例对本发明进行详细说明。
首先请参见图1，图1是根据本发明第一实施例的手机的电路结构示意图。如图1所示，本发明的手机包括射频功率放大器201、距离传感器202以及基带信号处理芯片203。其中，基带信号处理芯片203与射频功率放大器201连接，用于设置射频功率放大器201的最大功率输出值，并且，基带信号处理芯片203与距离传感器202连接，用于获取距离传感器202产生的中断信号。
在本发明中，利用基带信号处理芯片203设置两个DAC参数以控制射频功率放大器201的最大输出功率。其中，DAC参数为射频功率放大器201的设置参数，用于设定射频功率放大器201的最大输出功率。而在本发明中，基带信号处理芯片203通过设置射频功率放大器201的DAC参数为580以使得射频功率放大器201的最大输出功率为第一输出功率33dBm，通过设置射频功率放大器201的DAC参数为560以使得射频功率放大器201的最大输出功率为第二输出功率32dBm。
由于在作电磁波吸收率测试的时候，需要贴近人脸进行测试，因此，利用距离传感器202检测手机是否靠近人脸，从而在判断到手机靠近人脸时发出中断信号至基带信号处理芯片203，使得基带信号处理芯片203设置射频功率放大器201使其要较小的最大输出功率输出射频信号。
并且，由于电磁波吸收率测试和天线辐射功率测试是必须在射频的最大输出功率等级的情况下测试的，因此在进行上述测试时，一旦建立通话，基站会给手机发出一个最大功率发送指令，命令手机以最大输出功率输出射频信号（即33±2dBm），因此，在没有收到基站的最大功率发送指令时，表明此时并不是在进行上述测试，此时基带信号处理芯片203控制射频功率放大器201的以正常通话时所需功率输出射频信号。
当基带信号处理芯片203接收到最大功率发送指令时，基带信号处理芯片203进一步判断是否接收到距离传感器202的中断信号，由于天线辐射功率测试无需将手机靠近人脸，因此在没有接收到中断信号时，说明当前进行的测试为天线辐射功率测试，基带信号处理芯片203采用第一个DAC参数580，以控制射频功率放大器201的最大输出功率为第一输出功率33dBm，在这种情况下，天线辐射功率会达到28.2dBm，达到标准。
当基带信号处理芯片203接收到距离传感器202的中断信号时，由于电磁波吸收率测试需将手机靠近人脸从而使得距离传感器202产生中断信号，在这种情况下，可判定当前在进行电磁波吸收率测试，故采用第二个DAC参数560，控制射频功率放大器201的第二输出功率为32dBm，因此，在测试电磁波吸收率时，因为射频功率放大器201采用第二输出功率32dBm作为最大输出功率，使得最大输出功率降低了1dBm，导致原先1.2W/Kg的电磁波吸收率会降低至约0.9W/Kg，从而达标。
以下将参见图2更为详实地介绍本发明的手机的功率调整方法。
请一并参阅图1及图2，图2是根据本发明第一实施例的手机的功率调整方法的流程图。如图2所示，本发明的手机的功率调整方法包括如下步骤：
步骤101：在建立通话时，判断是否接收到来自基站的最大功率发送指令，在判断结果为“是”时，执行步骤103，反之，执行步骤102。
步骤102：控制射频功率放大器201的以正常通话时所需功率输出射频信号。
步骤103：判断是否接收到距离传感器202发出的中断信号，在判断结果为“是”时，执行步骤104，反之，执行步骤105，其中，距离传感器202在手机与人脸的距离在预定距离范围内时发出中断信号，可在距离传感器202上根据需要设置预定距离，取决于实际应用，该预定距离范围优选设置在0到3厘米之间。
步骤104：设置射频功率放大器201的最大输出功率为第二输出功率。
步骤105：设置射频功率放大器201的最大输出功率为第一输出功率，其中，第一输出功率大于第二输出功率；
步骤106：控制射频功率放大器201以最大输出功率输出射频信号。
如上所述，在上述步骤104和步骤105中，第一输出功率可设置为33dBm，第二输出功率可设置为32dBm。具体通过设置射频功率放大器201的DAC参数为580以使得射频功率放大器201的第一输出功率为33dBm，通过设置射频功率放大器201的DAC参数为560以使得射频功率放大器201的第二输出功率为32dBm。
其中，上述的步骤101-106均由基带信号处理芯片203执行。
值得注意的是，上述的DAC参数、天线辐射功率标准值、第一输出功率、第二输出功率、电磁波标准值等具体数值可根据实际需要调整，本发明仅以一具体实施方式为例对本发明构思作出具体描述，在不背离本发明构思的前提下，对以上各具体数值不作具体限定。
因此，本发明通过判断是否接收到距离传感器202的中断信号，以判定当前所作测试为电磁波吸收率测试或天线辐射功率测试，在没有接收到距离传感器202的中断信号时判定当前测试为天线辐射功率测试，控制射频功率放大器201以第一输出功率作为最大输出功率输出射频信号以确保通过天线辐射功率测试，在接收到距离传感器202的中断信号时判定当前测试为电磁波吸收率测试，控制射频功率放大器201以小于第一输出功率的第二输出功率作为最大输出功率输出射频信号以确保通过电磁波吸收率测试，从而使得手机能同时满足电磁波吸收率测试和天线辐射功率测试的要求。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (12)

  1. 一种手机的功率调整方法，其中，包括如下步骤：
    a. 在建立通话时，判断是否接收到来自基站的最大功率发送指令；
    b. 在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的中断信号，其中，所述距离传感器在所述手机与人脸的距离在预定距离范围内时发出所述中断信号，所述预定距离范围在0到3厘米之间；
    c. 在判断到没有接收到所述中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到所述中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，所述第一输出功率大于所述第二输出功率，所述第一输出功率为33dBm，所述第二输出功率为32dBm；
    d．控制所述射频功率放大器以所述最大输出功率输出射频信号。
  2. 根据权利要求1所述的方法，其中，所述步骤b进一步包括：
    在判断到没有接收到来自基站的最大功率发送指令时，控制所述射频功率放大器的以正常通话时所需功率输出射频信号。
  3. 一种手机的功率调整方法，其中，包括如下步骤：
    a. 在建立通话时，判断是否接收到来自基站的最大功率发送指令；
    b. 在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的中断信号，其中，所述距离传感器在所述手机与人脸的距离在预定距离范围内时发出所述中断信号；
    c. 在判断到没有接收到所述中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到所述中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，所述第一输出功率大于所述第二输出功率；
    d．控制所述射频功率放大器以所述最大输出功率输出射频信号。
  4. 根据权利要求3所述的方法，其中，所述步骤b进一步包括：
    在判断到没有接收到来自基站的最大功率发送指令时，控制所述射频功率放大器的以正常通话时所需功率输出射频信号。
  5. 根据权利要求3所述的方法，其中，所述预定距离范围在0到3厘米之间。
  6. 根据权利要求3所述的方法，其中，所述第一输出功率为33dBm，所述第二输出功率为32dBm。
  7. 根据权利要求6所述的方法，其中，在所述步骤c中，通过设置所述射频功率放大器的DAC参数为580以使得所述射频功率放大器的第一输出功率为33dBm，通过设置所述射频功率放大器的DAC参数为560以使得所述射频功率放大器的第二输出功率为32dBm。
  8. 一种进行功率调整的手机，其中，包括：
    射频功率放大器，输出射频信号；
    距离传感器，在所述手机与人脸的距离在预定距离范围内时发出中断信号；
    基带信号处理芯片，分别与所述距离传感器以及所述射频功率放大器连接，在建立通话时，判断是否接收到来自基站的最大功率发送指令，在判断到接收到来自基站的最大功率发送指令时，判断是否接收到距离传感器发出的所述中断信号，在判断到没有接收到所述中断信号时，设置射频功率放大器的最大输出功率为第一输出功率，在判断到接收到所述中断信号时，设置射频功率放大器的最大输出功率为第二输出功率，其中，所述第一输出功率大于所述第二输出功率，并控制所述射频功率放大器以所述最大输出功率输出所述射频信号。
  9. 根据权利要求8所述的手机，其中，所述基带信号处理芯片在判断到没有接收到来自基站的最大功率发送指令时，控制所述射频功率放大器的以正常通话时所需功率输出所述射频信号。
  10. 根据权利要求8所述的手机，所述预定距离范围在0到3厘米之间。
  11. 根据权利要求8所述的手机，其中，所述第一输出功率为33dBm，所述第二输出功率为32dBm。
  12. 根据权利要求11所述的手机，其中，所述基带信号处理芯片通过设置所述射频功率放大器的DAC参数为580以使得所述射频功率放大器的第一输出功率为33dBm，通过设置所述射频功率放大器的DAC参数为560以使得所述射频功率放大器的第二输出功率为32dBm。
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CN102595571A (zh) * 2012-02-01 2012-07-18 惠州Tcl移动通信有限公司 手机及其功率调整方法

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CN102595571A (zh) 2012-07-18
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