公开(公告)号：US20110124304A1

公开(公告)日：2011-05-26

申请号：US13017238

申请日：2011-01-31

申请人： Toshikazu Tsuchiya ,  Kenji Suzuki ,  Michiko Satou ,  Akira Toyomane

发明人： Toshikazu Tsuchiya ,  Kenji Suzuki ,  Michiko Satou ,  Akira Toyomane

IPC分类号： H04B1/00

CPC分类号： H03F3/24 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/189 ,  H03F2200/105 ,  H03F2200/321 ,  H03F2200/336 ,  H03F2201/3233 ,  H04B2001/0425

摘要： A transmission apparatus performs distortion compensation on a power amplifier using a distortion compensator that includes an adaptive equalizer. The transmission apparatus includes a filter coefficient storage unit that stores filter coefficients that are each set in a digital filter of the adaptive equalizer; a filter coefficient setting unit that selects a filter coefficient from the filter coefficient storage unit according to a feedback signal from the power amplifier; an adjustment value storage unit that stores adjustment values in association with transmission frequencies, the adjustment values each being used by the filter coefficient setting unit to select the filter coefficient; and an initial value setting unit that reads an adjustment value corresponding to a transmission frequency, which is set in the transmission apparatus, from the adjustment value storage unit and sets the read adjustment value as an initial value of the adjustment value used for selecting the filter coefficient.

摘要翻译： 发送装置使用包括自适应均衡器的失真补偿器对功率放大器进行失真补偿。 发送装置包括滤波器系数存储单元，其存储各自设置在自适应均衡器的数字滤波器中的滤波器系数; 滤波器系数设定单元，根据来自功率放大器的反馈信号，从滤波器系数存储单元中选择滤波器系数; 调整值存储单元，其存储与发送频率相关联的调整值，所述调整值存储单元各自由所述滤波器系数设定单元使用以选择所述滤波器系数; 以及初始值设定单元，从所述调整值存储单元读取与所述发送装置中设定的发送频率对应的调整值，并将所述读取的调整值设定为用于选择所述过滤器的调整值的初始值 系数。

公开(公告)号：US08179989B2

公开(公告)日：2012-05-15

申请号：US12402700

申请日：2009-03-12

申请人： Akira Toyomane ,  Katsunori Araki ,  Yoshihiro Gonai

发明人： Akira Toyomane ,  Katsunori Araki ,  Yoshihiro Gonai

IPC分类号： H04K1/10

CPC分类号： H04L27/2626 ,  H03F1/3247 ,  H03F2201/3233 ,  H04L27/368 ,  H04L27/3863

摘要： An transmission apparatus includes a pseudo data addition section configured to add pseudo data into transmission data for a free subcarrier of a radio frequency, an OFDM modulator subjecting the transmission data added with the pseudo data to OFDM modulation, a power amplifier amplifying power of a transmission signal of the radio frequency, the transmission signal based on an OFDM signal subjected to the OFDM modulation, an antenna radiating the amplified transmission signal by using the radio frequency; and a distortion compensation circuit compensating for a distortion characteristic of the power amplifier by correcting the OFDM signal with a distortion compensation coefficient accumulated corresponding to the power value of the OFDM signal, outputting the corrected signal for the power amplifier, and monitoring the output of the power amplifier to update the distortion compensation coefficient.

摘要翻译： 发送装置包括：伪数据添加部，被配置为将伪数据添加到用于射频的空闲副载波的发送数据中; OFDM调制器，对添加了伪数据的发送数据进行OFDM调制，功率放大器放大发送功率 射频信号，基于进行OFDM调制的OFDM信号的发送信号，利用射频辐射放大后的发送信号的天线; 以及失真补偿电路，通过用与OFDM信号的功率值相对应地累积的失真补偿系数校正OFDM信号，输出功率放大器的校正信号，并监视功率放大器的输出，来补偿功率放大器的失真特性 功率放大器更新失真补偿系数。