公开(公告)号：EP1755302A3

公开(公告)日：2007-09-12

申请号：EP05258020.6

申请日：2005-12-23

申请人： Fujitsu Ltd.

发明人： Ohba, Takeshi c/o Fujitsu Limited ,  Funyu, Yasuhito c/o Fujitsu Limited ,  Shako, Hideharu c/o Fujitsu Limited

IPC分类号： H04L27/36 ,  H03F1/32 ,  H03G1/04

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H04L27/364 ,  H04L2027/0016

摘要： A distortion compensating technique applied to a transmitter for transmitting a quadrature modulated signal in a wireless digital communication system is provided. A phase adjustment value is determined for a quadrature demodulated feedback signal based on comparison between the feedback signal and a reference signal to be transmitted from the transmitter. This phase adjustment value is compared with the previous phase adjustment value. If the comparison result between the current and previous phase adjustment values satisfies a prescribed condition, correction for quadrature modulation, such as DC offset correction, orthogonality correction, or IQ amplitude correction, is performed.

公开(公告)号：EP1755302B1

公开(公告)日：2009-02-18

申请号：EP05258020.6

申请日：2005-12-23

申请人： Fujitsu Ltd.

发明人： Ohba, Takeshi c/o Fujitsu Limited ,  Funyu, Yasuhito c/o Fujitsu Limited ,  Shako, Hideharu c/o Fujitsu Limited

IPC分类号： H04L27/36 ,  H03F1/32 ,  H03G1/04

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H04L27/364 ,  H04L2027/0016

公开(公告)号：EP1755302A2

公开(公告)日：2007-02-21

申请号：EP05258020.6

申请日：2005-12-23

申请人： Fujitsu Ltd.

发明人： Ohba, Takeshi c/o Fujitsu Limited ,  Funyu, Yasuhito c/o Fujitsu Limited ,  Shako, Hideharu c/o Fujitsu Limited

IPC分类号： H04L27/36

CPC分类号： H04L27/368 ,  H03F1/3247 ,  H04L27/364 ,  H04L2027/0016

摘要： A distortion compensating technique applied to a transmitter for transmitting a quadrature modulated signal in a wireless digital communication system is provided. A phase adjustment value is determined for a quadrature demodulated feedback signal based on comparison between the feedback signal and a reference signal to be transmitted from the transmitter. This phase adjustment value is compared with the previous phase adjustment value. If the comparison result between the current and previous phase adjustment values satisfies a prescribed condition, correction for quadrature modulation, such as DC offset correction, orthogonality correction, or IQ amplitude correction, is performed.

摘要翻译： 提供了一种应用于在无线数字通信系统中发送正交调制信号的发射机的失真补偿技术。 基于反馈信号和要从发射机发射的参考信号之间的比较，确定正交解调反馈信号的相位调整值。 该相位调整值与先前的相位调整值进行比较。 如果当前和前一相位调整值之间的比较结果满足规定条件，则执行诸如DC偏移校正，正交校正或IQ幅度校正之类的正交调制的校正。