WO2006026919A1 - Equipement portatif servant a prolonger le temps de fonctionnement et procede de mise en oeuvre correspondant - Google Patents

Equipement portatif servant a prolonger le temps de fonctionnement et procede de mise en oeuvre correspondant Download PDF

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Publication number
WO2006026919A1
WO2006026919A1 PCT/CN2005/001420 CN2005001420W WO2006026919A1 WO 2006026919 A1 WO2006026919 A1 WO 2006026919A1 CN 2005001420 W CN2005001420 W CN 2005001420W WO 2006026919 A1 WO2006026919 A1 WO 2006026919A1
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WIPO (PCT)
Prior art keywords
module
radio frequency
power
handheld device
antenna module
Prior art date
Application number
PCT/CN2005/001420
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English (en)
French (fr)
Inventor
Hai Wang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP05783909A priority Critical patent/EP1788724A4/en
Publication of WO2006026919A1 publication Critical patent/WO2006026919A1/zh

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Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189High-frequency amplifiers, e.g. radio frequency amplifiers
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F2200/00Indexing scheme relating to amplifiers
    • H03F2200/451Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • H04B2001/0408Circuits with power amplifiers
    • H04B2001/045Circuits with power amplifiers with means for improving efficiency

Definitions

  • Handheld device for extending working time and implementation method thereof
  • the present invention relates to the field of radio frequency transmission technology, and more particularly to a handheld device and an implementation method for extending the working time. Background of the invention
  • CDMA Current Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • Figure 1 shows a typical circuit structure of an RF transmit channel.
  • the processing is specifically: inputting the baseband signal from the baseband; modulating the baseband signal by using the RF modulation module in the transmit modulation chip, and then adjusting The gain amplifier outputs a radio frequency signal of different radio frequency power under the control of the gain control signal sent by the baseband control module; the transmit filter filters the radio frequency signal to remove part of the clutter signal; and then the amplified radio frequency signal is amplified by the power amplifier; The amplified signal is then sent to the antenna via a duplexer.
  • the antenna can wirelessly transmit the processed RF signal.
  • the power amplifier only needs to implement the fixed gain amplification function.
  • CDMA and WCDMA require that the transmit power of the handheld device be as small as possible, but if the handheld device is far from the base station, the handheld device must transmit a higher power RF signal.
  • the signal of how much power is specifically transmitted is realized by the baseband control module in the circuit structure shown in FIG. For example, if the handheld device is currently closer to the base station, the baseband control module requires the adjustable gain amplifier to output a lower power RF signal through the gain control signal; if the handheld device is currently far away from the base station, the baseband control module requires the gain control signal
  • the adjustable gain amplifier outputs a higher power RF signal. After adjusting the RF signal through an adjustable gain amplifier, Through the fixed gain amplification of the above power amplifier, the RF signals of different frequencies can be output.
  • the power of the radio frequency signal obtained by transmitting the modulation chip in the above process is called P1
  • the power of the radio frequency signal that the antenna needs to transmit is called P0.
  • the requirements for these two powers are not the same in the industry.
  • the transmit power provided by the transmit modulation chip can directly satisfy the output power of the antenna in many cases. The following is a description of the relationship between the output power of the antenna port shown in FIG. 2 and the output power of the transmitting modulation chip in the terminal.
  • the X-axis in Figure 2 represents the output power of the handheld antenna port required by the current protocol, and the y-axis represents the statistical rate at which the actual output power of the antenna in the handheld device is less than the X value.
  • the handheld device's output power is less than 0dBm during 50% of the working time.
  • the maximum output power P1 of the transmitting modulation chip is often 4dBm. During these working hours, the transmitting power provided by the transmitting modulation chip can satisfy the signal output power of the antenna port, so there is no need to perform signal processing through the power amplifier.
  • the main object of the present invention is to provide a hand-held device that prolongs working hours. Ready.
  • Another object of the present invention is to provide an implementation method for extending the operating time of a handheld device.
  • the handheld device includes: a radio frequency processing module, configured to modulate a baseband signal, and generate a radio frequency signal; and an antenna module, configured to transmit the radio frequency signal;
  • the handheld device further includes:
  • a power amplifier processing module including a power amplifier module, for power amplification of a radio frequency signal, wherein the power amplifier module is in an idle state when no radio frequency signal passes; the power amplifier processing module is respectively connected to the radio frequency processing module and the antenna module, and is used in the antenna module
  • the output power is not greater than the maximum power that the handheld device can input into the antenna module, and the RF signal is directly transmitted to the antenna module; and when the output power of the antenna module is greater than the maximum power that the handheld device can input into the antenna module, the RF signal is passed.
  • the power amplifier module of itself is amplified by power and then sent to the antenna module.
  • the handheld device may further include: a baseband control module; the power amplifier processing module further includes: a switch module;
  • the baseband control module is configured to: when the output power of the antenna module is not greater than the maximum power that the handheld device can input into the antenna module, send a control signal that directly sends the radio frequency signal to the antenna module to the switch module; and the output power of the antenna module is greater than When the handheld device is capable of inputting the maximum power of the antenna module, transmitting, to the switch module, a control signal for transmitting the radio frequency signal to the antenna module through the power amplifier module;
  • the switch module is configured to send the received radio frequency signal directly to the antenna module according to the control signal sent by the baseband control module, or send the received radio frequency signal to the power amplifier module for power amplification processing, and then send the signal to the antenna module.
  • the switch module includes two switches and a transmission line, and one end of the first switch and the radio frequency processing The module is connected, the other end is connected to the power amplifier module, one end of the second switch is connected to the power amplifier module, and the other end is connected to the antenna module, and the two switches are directly connected through the transmission line;
  • the switch module directly sends the radio frequency signal received by the first switch to the antenna module directly through the transmission line and the second switch according to the control signal sent by the baseband control module; or sends the radio frequency signal received by the first switch to the power amplifier module, and
  • the second switch sends the RF signal processed by the power amplifier module to the antenna module.
  • the radio frequency processing module includes:
  • a modulation modulation chip configured to perform modulation and gain amplification processing on the baseband signal, and send the processed radio frequency signal to the transmission filtering module;
  • the transmitting filter module is configured to filter the received RF signal, and send the filtered RF signal to the power amplifier processing module.
  • the power amplifier processing module is connected to the antenna module through a duplex module.
  • the handheld device obtains the radio frequency signal by performing radio frequency modulation processing on the baseband signal, and sets the power amplifier module in the handheld device to: is in an idle state when no radio frequency signal passes; Further includes the following steps:
  • the handheld device determines whether the transmit power of the antenna module in the device is greater than the maximum power that the device can input into the antenna module. If not, proceed to step b, otherwise, proceed to step c;
  • the handheld device directly transmits the radio frequency modulated radio frequency signal through the antenna module, and then ends the processing flow;
  • the handheld device performs power amplification processing on the RF-modulated RF signal through the power amplifier module, and sends the processed RF signal through the antenna module.
  • the maximum power that the device can input into the antenna module is: the maximum transmission frequency of the radio frequency signal obtained by the radio frequency modulation processing of the handheld device.
  • the maximum power that the device can input into the antenna module is: the difference between the maximum transmission frequency of the radio frequency signal obtained by the radio frequency modulation processing of the handheld device and the transmission power loss of the handheld device.
  • the handheld device includes a transmit filter module for filtering, the transmit power loss including a power loss of the transmit filter module;
  • the handheld device and/or the duplex module for duplex processing includes the power loss of the duplex module.
  • the handheld device controls transmission of a radio frequency signal through a switch module, and the transmit power loss includes power loss of the switch module.
  • the invention provides a power amplifier processing module capable of directly transmitting signals to the antenna module in the handheld device, and sets the power amplifier module in the power amplifier processing module to be in an idle state when no radio frequency signal passes, so that the output power of the handheld device in the antenna module is not When the maximum power of the antenna module can be input, the power amplifier processing module can directly transmit the signal to the antenna module. Since the power amplifier is in an idle state at this time, and the current consumed by the power amplifier module in the idle state is at the uA level, the present invention is Under the premise of maintaining normal communication, the energy loss of the power amplifier module is saved, thereby greatly extending the working time of the handheld device and improving the working efficiency of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a circuit structural diagram of a radio frequency transmitting channel in a current handheld device
  • FIG. 2 is a schematic diagram showing the relationship between the standard output power of the antenna port and the actual output power in FIG. 1;
  • FIG. 3 is a circuit structural diagram of a radio frequency transmitting channel in a handheld device according to the present invention.
  • FIG. 4 is a flow chart of a method of implementing the present invention in accordance with an embodiment of the present invention. Mode for carrying out the invention
  • the solution of the invention mainly improves the circuit structure of the radio frequency transmitting channel in the handheld device, so that the radio frequency power that can be output by the transmitting modulation chip can directly transmit the radio frequency signal to the antenna module when the antenna needs to be transmitted without power amplification. Without power amplification.
  • the circuit structure of the radio frequency transmitting channel in the solution of the present invention is as shown in FIG. 3, and includes a radio frequency processing module 301, a power amplifier processing module 302, and an antenna module 303.
  • the RF processing module 301 includes a transmit modulation chip 306 for modulating and gain amplifying the baseband signal.
  • the RF processing module 301 may further include a transmit filtering module 307, configured to filter the processed signal of the transmit modulation chip 306, and send the processed signal to the power amplifier processing module 302.
  • the power amplifier processing module 302 is respectively connected to the radio frequency processing module 301 and the antenna module 303, and is configured to send the radio frequency signal directly to the antenna module 303 when the output power of the antenna module 303 is not greater than the maximum power that the handheld device can input into the antenna module 303.
  • the RF signal is power amplified and then transmitted to the antenna module 303. It is also necessary to set the power amplifier module 308 in the power amplifier processing module 302 to: be in an idle state when no radio frequency signal passes, because the power amplifier module only needs uA current in the idle state, so the power amplifier module can be reduced by this setting. 308 of energy to be consumed.
  • the power amplifier processing module 302 can be specifically configured by the power amplifier module 308 and the switch module.
  • the switch module includes two switches 309 and 310 and a transmission line 311. One end of the switch 309 is connected to the RF processing module 301, and the other end is connected to the power amplifier module 308. One end of the switch 310 is connected to the power amplifier module 308, and the other end is connected to the antenna module 303. And the two switches are also directly connected through the transmission line 311.
  • the holding device can input the maximum power of the antenna module 303, and the switch module directly transmits the radio frequency signal to the antenna module 303, that is, the switch 309 sends the signal directly to the switch 310 through the transmission line 311, and then the signal is sent to the antenna by the switch 310.
  • a baseband control module 304 can be provided in the above circuit.
  • the baseband control module 304 determines the power that the antenna module 303 needs to output and the maximum power that the handheld device can input into the antenna module 303. If the former is larger than the latter, the power amplifier needs to be amplified by the power amplifier in the power amplifier processing module 302.
  • the antenna module 303 thus sends a control signal to the power amplifier processing module 302 to control the switch 309 to transmit the radio frequency signal directly to the switch 310 through the transmission line.
  • the duplex module 305 can also be disposed in the above circuit, and the power amplifier processing module 302 transmits the radio frequency signal to the antenna module 303 through the duplex module 305.
  • the baseband control module 304 determines the two powers, if the power loss in the circuit is negligible, the maximum power output by the modulation chip 306 in the RF processing module 301 can be input to the antenna module 303 as a handheld device. Maximum power. Of course, if the power loss in the circuit cannot be ignored, the difference between the maximum power and the power loss output by the modulation chip 306 in the RF processing module 301 should be taken as the maximum power of the input antenna module 303.
  • the power loss may be caused by the transmit filter module, or may be caused by the switch module in the power amplifier processing module, or may be brought by the duplex module. Of course, it may be All these modules are brought.
  • the power loss can be estimated in advance, that is, a power loss can be preset, which is specifically set according to the loss that may be brought about in the handheld device. Thus, assuming that the power loss is L1, the output power of the antenna module is P0, and the maximum output power of the transmitting modulation chip is P1, then the judgment is to determine whether P0 is less than or equal to (P1 - L1).
  • Step 401 The handheld device determines whether the transmit power of the antenna module in the device is greater than the maximum power that the device can input into the antenna module. If not, step 402 is performed; otherwise, step 403 is performed;
  • Step 402 The handheld device performs radio frequency modulation on the received radio frequency signal, and sends the radio frequency modulated radio frequency signal through the antenna module, and then ends the processing flow.
  • Step 403 The handheld device performs radio frequency modulation on the received radio frequency signal.
  • the power amplifier module performs power amplification processing on the radio frequency modulated radio frequency signal, and sends the processed radio frequency signal through the antenna module.
  • the baseband control module in the handheld device uses the maximum transmit frequency of the radio frequency signal obtained by the radio frequency modulation processing of the handheld device as the maximum power that the device can input into the antenna module, and implements the foregoing step 401.
  • the baseband control module in the handheld device can also use the difference between the maximum transmission frequency of the radio frequency signal obtained by the radio frequency modulation processing of the handheld device and the transmission power loss of the handheld device as the device capable of inputting the antenna module. Maximum power, the determination as described in step 401 above; wherein, in other embodiments of the invention, if the handheld device includes a transmit filtering module for filtering and/or includes a duplex module for duplex processing, the transmitting The power loss also needs to further include the power loss of the transmit filter module and/or the duplex module; When the handheld device controls the transmission of the radio frequency signal through the switch module, the transmit power loss further needs to further include the power loss of the switch module.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

一种延长工作时间的手持设备及实现方法 技术领域
本发明涉及射频发射技术领域, 更确切地说是涉及一种延长工作时 间的手持设备及实现方法。 发明背景
目前的码分多址(CDMA ) 以及宽带码分多址(WCDMA )手持设 备都是通过射频发射通道发射射频信号。
图 1所示为射频发射通道的一种典型电路结构。 其射频信号在通过 天线发送出去之前,首先要经过该射频发射通道的处理,该处理具体为: 从基带输入基带信号; 在发射调制芯片中利用射频调制模块对基带信号 进行调制 , 之后由可调增益放大器在基带控制模块发出的增益控制信号 的控制下, 输出不同射频功率的射频信号; 发射滤波器对射频信号进行 滤波, 除去部分杂波信号; 之后由功放对滤波后的射频信号进行放大; 放大后的信号再经过双工器发送到天线。 在上述处理之后, 天线即可对 处理后的射频信号进行无线传递。 其中, 功放只需要实现固定增益放大 功能即可。
CDMA及 WCDMA要求手持设备的发射功率尽可能地小, 但是如 果手持设备离基站较远, 则手持设备必须发射较大功率的射频信号。 具 体发射多大功率的信号则由图 1所示电路结构中的基带控制模块实现。 比如, 如果手持设备当前离基站较近, 则基带控制模块通过增益控制信 号要求可调增益放大器输出较小功率的射频信号; 如果手持设备当前离 基站较远, 则基带控制模块通过增益控制信号要求可调增益放大器输出 较大功率的射频信号。 在通过可调增益放大器对射频信号进行调节后, 通过上述功放的固定增益放大, 即可输出不同频率的射频信号了。
将上述处理过程中发射调制芯片得到的射频信号的功率称为 Pl,天 线需要发射出去的射频信号的功率称为 P0。 目前业界对这两个功率的要 求并不相同。 比如, 在 WCDMA CLASSIII的终端设备中, 天线输出口 的功率在协议上要求的是 P0 = - 50dBm ~ 24dBm, 而大多数发射调制芯 片能够实现的最大功率 P1往往是 4dBm, 当然也可能更大一些。但实际 上, 发射调制芯片所提供的发射功率在很多情况下还是能够直接满足天 线的输出功率的。 下面以图 2所示的天线口输出功率与终端中发射调制 芯片输出功率的关系示意图对这一情况进行说明。
图 2 中的 X轴表示目前协议要求的手持设备天线口的输出功率, y 轴表示手持设备中天线的实际输出功率小于 X值的统计率。 从图 2可以 看出, 手持设备在 50 %的工作时间内, 其输出功率都要小于 0dBm。 而 发射调制芯片的最大输出功率 P1往往是 4dBm, 在这些工作时间里, 发 射调制芯片所提供的发射功率已经能够满足天线口的信号输出功率, 因 此不需要再通过功放进行信号处理了。
而实际上, 由于存在一个具有固定增益放大功能的功放, 即使通过 基带控制模块能够将发射调制芯片的发射功率调制为与天线口的信号 输出功率相同, 也不能这么处理, 而是将该发射功率设置为一个较低的 功率值, 之后再由功放对该功率值进行放大处理。 对于功放来说, 不管 在什么情况下, 都要进行信号处理, 也即处于信号放大状态, 依然要保 持 60mA ~ 90mA 的静态电流, 显然这造成了能量损失, 降低了终端的 整机效率, 也缩短了终端的通话时间。 发明内容
有鉴于此, 本发明的主要目的在于提供一种延长工作时间的手持设 备。
本发明的另一个目的在于提供一种手持设备工作时间延长的实现方 法。
本发明的一种延长工作时间的手持设备, 所述手持设备包括: 射频处理模块, 用于对基带信号进行调制, 并生成射频信号; 天线模块, 用于将射频信号发射出去;
该手持设备进一步包括:
功放处理模块, 包括功放模块, 用于射频信号的功率放大, 所述功 放模块在没有射频信号通过时为空闲状态; 所述功放处理模块分别与射 频处理模块及天线模块连接, 用于在天线模块的输出功率不大于本手持 设备能够输入天线模块的最大功率时, 将射频信号直接发送到天线模 块; 以及在天线模块的输出功率大于本手持设备能够输入天线模块的最 大功率时, 将射频信号通过自身的功放模块进行功率放大, 之后再发送 到天线模块。
所述手持设备可以进一步包括: 基带控制模块; 所述功放处理模块 进一步包括: 开关模块; 其中,
基带控制模块, 用于在天线模块的输出功率不大于本手持设备能够 输入天线模块的最大功率时, 向开关模块发送将射频信号直接发送到天 线模块的控制信号; 以及在天线模块的输出功率大于本手持设备能够输 入天线模块的最大功率时, 向开关模块发送将射频信号通过功放模块发 送到天线模块的控制信号;
开关模块, 用于根据基带控制模块发送来的控制信号将收到的射频 信号直接发送到天线模块; 或者将收到的射频信号发送到功放模块进行 功率放大处理后, 再发送到天线模块。
所述开关模块包括两个开关及传输线, 第一开关的一端与射频处理 模块连接, 另一端与功放模块连接, 第二开关的一端与功放模块连接, 另一端与天线模块连接, 且这两个开关通过传输线直接连接;
开关模块根据基带控制模块发送来的控制信号将第一开关收到的射 频信号直接通过传输线及第二开关直接发送到天线模块; 或者将第一开 关收到的射频信号发送到功放模块, 并由第二开关将功放模块处理后的 射频信号发送到天线模块。
所述射频处理模块包括:
发射调制芯片, 用于对基带信号进行调制及增益放大处理, 并将处 理得到的射频信号发送给发射滤波模块;
发射滤波模块, 用于对收到的射频信号进行滤波处理, 并将滤波后 的射频信号发送给功放处理模块。
所述功放处理模块通过双工模块与天线模块连接。
本发明的一种手持设备工作时间延长的实现方法, 手持设备通过对 基带信号进行射频调制处理得到射频信号, 将手持设备中的功放模块设 置为: 在没有射频信号通过时处于空闲状态; 该方法进一步包括以下步 驟:
a. 手持设备判断本设备中天线模块的发射功率是否大于本设备能 够输入天线模块的最大功率, 如果不是, 则进入步骤 b, 否则, 进入步 骤 c;
b. 手持设备直接将射频调制后的射频信号通过天线模块发送出去, 之后结束本处理流程;
c 手持设备通过功放模块对射频调制后的射频信号进行功率放大 处理, 并将处理后的射频信号通过天线模块发送出去。
所述步骤 a中, 所述本设备能够输入天线模块的最大功率为: 手持 设备射频调制处理得到的射频信号的最大发射频率。 所述本设备能够输入天线模块的最大功率为:.手持设备射频调制处 理得到的射频信号的最大发射频率与手持设备的发射功率损耗之差。
所述手持设备包括用于滤波的发射滤波模块, 所述发射功率损耗包 括发射滤波模块的功率损耗; .
所述手持设备和 /或包括用于双工处理的双工模块, 所述发射功率损 耗包括双工模块的功率损耗。
所述手持设备通过开关模块控制射频信号的发送, 所述发射功率损 耗包括所述开关模块的功率损耗。
本发明通过在手持设备中设置能够将信号直接传输到天线模块的功 放处理模块 , 并设置功放处理模块中的功放模块在没有射频信号通过时 处于空闲状态, 使得手持设备在天线模块的输出功率不大于能够输入天 线模块的最大功率时, 该功放处理模块可以直接将信号传输到天线模 块, 由于这时功放处于空闲状态, 且空闲状态下功放模块所消耗的电流 处于 uA级, 因此本发明方案在保持正常通信的前提下, 节约了功放模 块的能量损耗, 从而大大延长了手持设备的工作时间, 并提高了整机的 工作效率。 附图简要说明
图 1为目前手持设备中射频发射通道的电路结构图;
图 2为图 1中天线口标准输出功率与实际输出功率的比例关系示意 图;
图 3为本发明方案手持设备中射频发射通道的电路结构图。
图 4为本发明一实施例中实现本发明方法的流程图。 实施本发明的方式
本发明方案主要是对手持设备中射频发射通道的电路结构进行改 进, 使得发射调制芯片能够输出的射频功率在不通过功率放大即可满足 天线的发射需要时, 可以直接将射频信号发送到天线模块, 而不经过功 率放大处理。 下面结合附图及具体实施例对本发明方案作进一步详细的 说明。
本发明方案中射频发射通道的电路结构如图 3所示, 包括射频处理 模块 301、 功放处理模块 302、 天线模块 303。
射频处理模块 301中包括发射调制芯片 306, 用于对基带信号进行 调制及增益放大处理。射频处理模块 301还可以包括发射滤波模块 307, 用于对发射调制芯片 306处理后的信号进行滤波处理, 并将处理后的信 号发送给功放处理模块 302。
功放处理模块 302分别与射频处理模块 301及天线模块 303连接, 用于在天线模块 303 的输出功率不大于本手持设备能够输入天线模块 303 的最大功率时, 将射频信号直接发送到天线模块 303 , 并在天线模 块 303 的输出功率大于本手持设备能够输入天线模块 303 的最大功率 时, 将射频信号进行功率放大, 之后再发送到天线模块 303。 还需要将 功放处理模块 302中的功放模块 308设置为: 在没有射频信号经过时处 于空闲状态, 这是因为功放模块在空闲状态下只需 uA级的电流, 因此 通过这种设置可以降低功放模块 308所要消耗的能量。
该功放处理模块 302具体可以由功放模块 308以及开关模块完成其 功能。 开关模块包括两个开关 309、 310及传输线 311 , 开关 309的一端 与射频处理模块 301连接, 另一端与功放模块 308连接, 开关 310的一 端与功放模块 308连接, 另一端与天线模块 303连接, 并且这两个开关 还通过传输线 311直接连接。 如果天线模块 303的输出功率不大于本手 持设备能够输入天线模块 303的最大功率, 则开关模块将射频信号直接 发送到天线模块 303, 也就是说, 开关 309将信号直接通过传输线 311 发送到开关 310, 再由开关 310将信号发送到天线模块 303; 否则, 开 关模块中的开关 309将该信号先发送到功放模块 308,再由功放模块 308 将功率放大后的信号发送到开关 310, 由开关 310将信号发送到天线模 块 303。
为实现对功放处理模块的控制, 可以在上述电路中设置基带控制模 块 304。 基带控制模块 304对天线模块 303需要输出的功率以及本手持 设备能够输入天线模块 303的最大功率进行判断, 如果前者大于后者, 则需要通过功放处理模块 302中的功放对信号进行功率放大, 因此向功 放处理模块 302发送控制信号, 以控制开关 309将射频信号发送到功放 模块 308, 并由开关 310将功放模块 308放大后的射频信号发送到天线 模块 303; 否则, 可以直接将射频信号发送到天线模块 303 , 因此向功 放处理模块 302发送控制信号, 以控制开关 309将射频信号直接通过传 输线发送到开关 310。
当然, 上述电路中还可以设置双工模块 305 , 则功放处理模块 302 通过双工模块 305将射频信号发送到天线模块 303。
其中, 基带控制模块 304对两个功率进行判断时, 如果该电路中可 能造成的功率损耗可以忽略, 则可以将射频处理模块 301中发射调制芯 片 306输出的最大功率作为手持设备能够输入天线模块 303 的最大功 率。 当然,如果电路中的功率损耗不能忽略,则应该将射频处理模块 301 中发射调制芯片 306输出的最大功率与功率损耗之差作为输入天线模块 303的最大功率。
该功率损耗可能是由发射滤波模块带来的 , 也可能是由功放处理模 块中的开关模块带来的, 还可能是由双工模块带来的, 当然, 也可能是 所有这些模块所带来的。 该功率损耗是可以预先估计的, 也就是说, 可 以预设一个功率损耗, 该功率损耗具体是根据手持设备中可能会带来的 损耗设定。 这样, 假设功率损耗为 L1 , 天线模块的输出功率为 P0, 发 射调制芯片的最大输出功率为 P1 , 则该判断即为判断 P0是否小于或等 于 ( P1 - L1 ).
基于如上所描述的手持设备, 下面对本发明所提供的方法进行详细 描述:
参见图 4, 实现本发明需要以下步驟:
步驟 401: 手持设备判断本设备中天线模块的发射功率是否大于本 设备能够输入天线模块的最大功率, 如果不是, 则执行步驟 402, 否则, 执行步骤 403;
步驟 402: 手持设备对接收到的射频信号进行射频调制 , 通过天线 模块将该射频调制后的射频信号发送出去 , 然后, 结束本处理流程; 步骤 403: 手持设备对接收到的射频信号进行射频调制, 通过功放 模块对射频调制后的射频信号进行功率放大处理, 将处理后的射频信 号通过天线模块发送出去。
其中, 在本发明一实施例中, 手持设备中的基带控制模块将手持设 备射频调制处理得到的射频信号的最大发射频率作为上述本设备能够 输入天线模块的最大功率, 实现如上步骤 401所述的判断;
在本发明另一实施例中, 手持设备中的基带控制模块还可将手持设 备射频调制处理得到的射频信号的最大发射频率与手持设备的发射功 率损耗之差作为上述本设备能够输入天线模块的最大功率, 实现如上步 骤 401所述的判断; 其中, 在本发明其它实施例中, 如果手持设备包括 用于滤波的发射滤波模块和 /或包括用于双工处理的双工模块,则上述发 射功率损耗还需进一步包括发射滤波模块和 /或双工模块的功率损耗;在 手持设备通过开关模块控制射频信号的发送时, 所述发射功率损耗还需 进一步包括所述开关模块的功率损耗。
以上所述仅为本发明方案的较佳实施例, 并不用以限定本发明的保 护范围。

Claims

权利要求书
1、 一种延长工作时间的手持设备, 所述手持设备包括:
射频处理模块, 用于对基带信号进行调制, 并生成射频信号; 天线模块, 用于将射频信号发射出去;
其特征在于, 该手持设备进一步包括:
功放处理模块, 包括功放模块, 用于射频信号的功率放大, 所述功 放模块在没有射频信号通过时为空闲状态; 所述功放处理模块分别与射 频处理模块及天线模块连接, 用于在天线模块的输出功率不大于本手持 设备能够输入天线模块的最大功率时, 将射频信号直接发送到天线模 块; 以及在天线模块的输出功率大于本手持设备能够输入天线模块的最 大功率时, 将射频信号通过自身的功放模块进行功率放大, 之后再发送 到天线模块。
2、根据权利要求 1所述的手持设备, 其特征在于, 所述手持设备进 一步包括: 基带控制模块; 所述功放处理模块进一步包括: 开关模块; 其中,
基带控制模块, 用于在天线模块的输出功率不大于本手持设备能够 输入天线模块的最大功率时, 向开关模块发送将射频信号直接发送到天 线模块的控制信号; 以及在天线模块的输出功率大于本手持设备能够输 入天线模块的最大功率时, 向开关模块发送将射频信号通过功放模块发 送到天线模块的控制信号;
开关模块, 用于根据基带控制模块发送来的控制信号将收到的射频 信号直接发送到天线模块; 或者将收到的射频信号发送到功放模块进行 功率放大处理后, 再发送到天线模块。
3、根据权利要求 2所述的手持设备, 其特征在于, 所述开关模块包 括两个开关及传输线, 第一开关的一端与射频处理模块连接, 另一端与 功放模块连接, 笫二开关的一端与功放模块连接, 另一端与天线模块连 接, 且这两个开关通过传输线直接连接;
开关模块根据基带控制模块发送来的控制信号将第一开关收到的射 频信号直接通过传输线及第二开关直接发送到天线模块; 或者将第一开 关收到的射频信号发送到功放模块, 并由第二开关将功放模块处理后的 射频信号发送到天线模块。
4、根据权利要求 2所述的手持设备, 其特征在于, 所述射频处理模 块包括:
发射调制芯片, 用于对基带信号进行调制及增益放大处理, 并将处 理得到的射频信号发送给发射滤波模块;
发射滤波模块, 用于对收到的射频信号进行滤波处理, 并将滤波后 的射频信号发送给功放处理模块。
5、 根据权利要求 1、 2或 4所述的手持设备, 其特征在于, 所述功 放处理模块通过双工模块与天线模块连接。
6、一种手持设备工作时间延长的实现方法,手持设备通过对基带信 号进行射频调制处理得到射频信号, 其特征在于, 将手持设备中的功放 模块设置为: 在没有射频信号通过时处于空闲状态; 该方法进一步包括 以下步驟:
a. 手持设备判断本设备中天线模块的发射功率是否大于本设备能 够输入天线模块的最大功率, 如果不是,·则进入步驟 b, 否则, 进入步 骤 c;
b. 手持设备直接将射频调制后的射频信号通过天线模块发送出去, 之后结束本处理流程;
c 手持设备通过功放模块对射频调制后的射频信号进行功率放大 处理, 并将处理后的射频信号通过天线模块发送出去。
7、根据权利要求 6所述的方法, 其特征在于所述步骤 a中, 所述本 设备能够输入天线模块的最大功率为: 手持设备射频调制处理得到的射 频信号的最大发射频率。
8、根据权利要求 6所述的方法, 其特征在于, 所述本设备能够输入 天线模块的最大功率为: 手持设备射频调制处理得到的射频信号的最大 发射频率与手持设备的发射功率损耗之差。
9、 居权利要求 8所述的方法, 其特征在于, 所述手持设备包括用 于滤波的发射滤波模块, 所述发射功率损耗包括发射滤波模块的功率损 耗;
所述手持设备和 /或包括用于双工处理的双工模块,所述发射功率损 耗包括双工模块的功率损耗。
10、 根据权利要求 8或 9所述的方法, 其特征在于, 所述手持设备 通过开关模块控制射频信号的发送, 所述发射功率损耗包括所述开关模 块的功率损耗。
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