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公开(公告)号：US20140003554A1
公开(公告)日：2014-01-02
申请号：US13895014
申请日：2013-05-15
申请人： FUJITSU LIMITED
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/3241 , H04B2001/0425
摘要： In a distortion compensating unit, a threshold calculating unit calculates a clip threshold to be set in an adjusting unit based on an address value generated by an address generating circuit. For example, the threshold calculating unit calculates the clip threshold by identifying the maximum value of address values generated by the address generating circuit in each adjustment unit period and subtracting a certain offset value from the identified maximum value. The adjusting unit adjusts a distortion compensation coefficient based on an address value received from the address generating circuit and a magnitude relationship with the set clip threshold.
摘要翻译： 在失真补偿单元中，阈值计算单元基于由地址发生电路产生的地址值来计算要在调整单元中设置的限幅阈值。 例如，阈值计算单元通过在每个调整单位期间中识别由地址生成电路生成的地址值的最大值来计算剪辑阈值，并从所识别的最大值中减去一定的偏移值。 调整单元基于从地址生成电路接收到的地址值和与设定剪辑阈值的大小关系来调整失真补偿系数。
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公开(公告)号：US20150280947A1
公开(公告)日：2015-10-01
申请号：US14628936
申请日：2015-02-23
申请人： FUJITSU LIMITED
CPC分类号： H04L25/08 , H03F1/3247 , H03F3/19 , H03F3/245 , H03F2200/204 , H03F2200/207 , H03F2200/451 , H03F2201/3233 , H04L1/0043 , H04L25/03343
摘要： A wireless transmission device includes an amplifier that amplifies power of a wireless transmission signal, a table that stores a plurality of distortion compensation coefficients used for compensating non-linear distortion of the amplifier, and a control unit that alternately performs reading of one distortion compensation coefficient and writing of one distortion compensation coefficient adjusted based on a feedback signal from the amplifier, by using any one port of the table at the time of update of any distortion compensation coefficient out of the plurality of distortion compensation coefficients stored in the table.
摘要翻译： 无线传输装置包括放大无线传输信号的功率的放大器，存储用于补偿放大器的非线性失真的多个失真补偿系数的表以及交替执行一个失真补偿系数的读出的控制单元 以及基于来自放大器的反馈信号调整的一个失真补偿系数的写入，通过在更新表中存储的多个失真补偿系数中的任何失真补偿系数时使用表中的任何一个端口。
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公开(公告)号：US20140145788A1
公开(公告)日：2014-05-29
申请号：US14010064
申请日：2013-08-26
申请人： FUJITSU LIMITED
IPC分类号： H03F1/32
CPC分类号： H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3233
摘要： A distortion compensation device includes a storage unit, an address generator, and a distortion compensation processor. The storage unit stores therein a distortion compensation coefficient for compensating distortion generated in an amplifier for amplifying an input signal. The address generator generates a first address based on a power value of the signal at a current time. Furthermore, the address generator delays, every time a new augend is input, the sum of the power value of the signal at the current time and the augend. The address generator generates a second address based on the sum obtained by calculating a new augend, from the delayed sum. The distortion compensation processor acquires a distortion compensation coefficient corresponding to a combination of the first address and the second address from the storage unit and performs distortion compensation processing on the signal by using the acquired distortion compensation coefficient.
摘要翻译： 失真补偿装置包括存储单元，地址发生器和失真补偿处理器。 存储单元存储用于补偿放大器中产生的用于放大输入信号的失真的失真补偿系数。 地址产生器基于当前时间的信号的功率值产生第一地址。 此外，每当输入新的加法器时，地址发生器都会延迟当前时间的信号功率和加法器的总和。 地址发生器基于通过从延迟和计算新的加法而获得的总和来生成第二地址。 失真补偿处理器从存储单元获取对应于第一地址和第二地址的组合的失真补偿系数，并通过使用所获取的失真补偿系数对该信号执行失真补偿处理。
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4.发明申请DISTORTION COMPENSATION APPARATUS, DISTORTION COMPENSATION METHOD, AND RADIO COMMUNICATION APPARATUS 审中-公开失真补偿装置，失真补偿方法和无线电通信装置公开(公告)号：US20150003563A1
公开(公告)日：2015-01-01
申请号：US14278001
申请日：2014-05-15
申请人： FUJITSU LIMITED
IPC分类号： H04B15/00
CPC分类号： H04B1/0475 , H03F1/3241 , H03F3/24 , H04B2001/0408 , H04B2001/0425 , H04B2215/00
摘要： A distortion compensation apparatus for compensating distortion of an input signal by an amplifier, the apparatus including: a storage unit configured to store a distortion compensation coefficient; a distortion compensation processing unit configured to read the distortion compensation coefficient from the storage unit based on a plurality of first addresses each corresponding to power of the input signal and perform distortion compensation on the input signal; and a distortion compensation coefficient copy unit configured to store the distortion compensation coefficient stored at a third address to a second address in which no distortion compensation coefficient is stored, between a maximum address and a minimum address of the storage unit storing the distortion compensation coefficients out of plurality of first addresses.
摘要翻译： 一种用于通过放大器补偿输入信号的失真的失真补偿装置，所述装置包括：存储单元，被配置为存储失真补偿系数; 失真补偿处理单元，被配置为基于与所述输入信号的功率相对应的多个第一地址从所述存储单元读取所述失真补偿系数，并对所述输入信号执行失真补偿; 以及失真补偿系数复制单元，被配置为将存储在第三地址的失真补偿系数存储在存储失真补偿系数的存储单元的最大地址和最小地址之间，存储失真补偿系数的第二地址 的多个第一地址。
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公开(公告)号：US20140146910A1
公开(公告)日：2014-05-29
申请号：US14039598
申请日：2013-09-27
申请人： FUJITSU LIMITED
IPC分类号： H04B15/00
CPC分类号： H04B1/0475
摘要： 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.
摘要翻译： 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。
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