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    • 3. 发明申请
    • WIRELESS APPARATUS AND DISTORTION COMPENSATING METHOD
    • 无线设备和失效补偿方法
    • US20130259154A1
    • 2013-10-03
    • US13753818
    • 2013-01-30
    • FUJITSU LIMITED
    • Hikaru ISHIKAWASatoshi MATSUBARAHideharu SHAKO
    • H04B15/00
    • H04B15/00H03F1/3241H04B1/0475H04B2001/0425
    • A wireless apparatus includes amplifying systems each including a storing unit storing a distortion compensation coefficient for compensation for a nonlinear distortion of one or more transmission signals, a compensator compensating for the nonlinear distortion using the distortion compensation coefficient stored in the storing unit, and an amplifier amplifying the transmission signal after distortion compensation. The wireless apparatus further includes a switch that selects feedback signals corresponding to the transmission signals output from the amplifying systems, a subtractor that derives one or more differences between the feedback signal selected in the switch and the transmission signal, a first calculator that derives a distortion compensation coefficient that restricts the difference derived in the subtractor, and a switch controller that controls a length of time during which the feedback signal is selected in the switch depending on magnitude of distortion of the transmission signal output from the amplifying system.
    • 无线装置包括放大系统,每个放大系统包括存储单元,该存储单元存储用于补偿一个或多个发送信号的非线性失真的失真补偿系数,使用存储在存储单元中的失真补偿系数补偿非线性失真的补偿器,以及放大器 在失真补偿后放大传输信号。 所述无线装置还包括选择与从所述放大系统输出的发送信号对应的反馈信号的开关,导出所述开关中选择的反馈信号与所述发送信号之间的一个或多个差异的减法器,导出失真的第一计算器 限制在减法器中导出的差异的补偿系数;以及开关控制器,其根据从放大系统输出的发送信号的失真的大小来控制在开关中选择反馈信号的时间长度。
    • 7. 发明申请
    • DISTORTION COMPENSATION APPARATUS, TRANSMISSION APPARATUS, AND DISTORTION COMPENSATION METHOD
    • 失真补偿装置,传输装置和失真补偿方法
    • US20150077179A1
    • 2015-03-19
    • US14484074
    • 2014-09-11
    • FUJITSU LIMITED
    • Satoshi MATSUBARAHiroyoshi ISHIKAWA
    • H03F1/32
    • H03F1/3247H03F1/3258H03F3/24H03F2201/3227H03F2201/3233
    • A distortion compensation apparatus including: a memory configured to store a plurality of distortion compensation coefficients for compensating distortion to an input signal amplified by an amplifier, each of the plurality of distortion compensation coefficients being associated with a different combination of two addresses, and a processor configured to receive temperature information associated with a temperature of the amplifier, generate a first address based on the input signal at a first time, generate a second address based on an average of the input signal during a previous period preceding the first time, the average being calculated based on the temperature information, select a distortion compensation coefficient from the plurality of distortion compensation coefficients based on the first address and the second address, and compensate distortion to the input signal based on the selected distortion compensation coefficient.
    • 一种失真补偿装置,包括:存储器,被配置为存储用于将失真补偿到由放大器放大的输入信号的多个失真补偿系数,所述多个失真补偿系数中的每一个与两个地址的不同组合相关联,并且处理器 被配置为接收与所述放大器的温度相关联的温度信息,在第一时间基于所述输入信号生成第一地址,基于在所述第一时间之前的前一时段期间的所述输入信号的平均值生成第二地址, 基于所述温度信息计算,基于所述第一地址和所述第二地址从所述多个失真补偿系数中选择失真补偿系数,并且基于所选择的失真补偿系数来补偿所述输入信号的失真。
    • 10. 发明申请
    • DELAY QUANTITY ESTIMATION APPARATUS AND DELAY QUANTITY ESTIMATION METHOD
    • 延迟量估计装置和延迟量估计方法
    • US20140146910A1
    • 2014-05-29
    • US14039598
    • 2013-09-27
    • FUJITSU LIMITED
    • Satoshi MATSUBARAHIDEHARU SHAKOMitsuharu HAMANOKazuo NAGATANI
    • H04B15/00
    • H04B1/0475
    • A delay quantity estimation apparatus comprises a first correlation value arithmetic unit to calculate a first correlation value as a correlation value between a first input signal and a feedback signal delayed with a first delay value; a second correlation value arithmetic unit to calculate a second correlation value as a correlation value between the first input signal and a feedback signal delayed with a second delay value; and a delay quantity estimation unit to estimate a delay quantity of the feedback signal with respect to the input signal on the basis of the first difference value as a difference between the first correlation value and the second correlation value, wherein the second delay value is a value given by adding a certain value to the first delay value.
    • 延迟量估计装置包括第一相关值运算单元,用于计算第一相关值作为第一输入信号和以第一延迟值延迟的反馈信号之间的相关值; 第二相关值运算单元,计算第二相关值作为第一输入信号与以第二延迟值延迟的反馈信号之间的相关值; 以及延迟量估计单元,用于基于所述第一差值将所述反馈信号相对于所述输入信号的延迟量估计为所述第一相关值和所述第二相关值之间的差,其中所述第二延迟值为 通过向第一延迟值添加一定值给出的值。