公开(公告)号：US07558338B2

公开(公告)日：2009-07-07

申请号：US10649862

申请日：2003-08-28

申请人： Der-Zheng Liu ,  Song-Nien Tung ,  Kuang-Yu Yen ,  Tai-Cheng Liu

发明人： Der-Zheng Liu ,  Song-Nien Tung ,  Kuang-Yu Yen ,  Tai-Cheng Liu

IPC分类号： H04L27/00

CPC分类号： H03D3/009 ,  H04B1/40 ,  H04L27/2627 ,  H04L27/2649 ,  H04L2027/0016 ,  H04L2027/0022

摘要： An apparatus and method for estimating an I/Q imbalance parameter of a receiver and a transmitter. An apparatus for estimating an I/Q imbalance parameter of a receiver, the apparatus comprising: a signal generator; a transmitter; a receiver; and an estimator. An apparatus for estimating an I/Q imbalance parameter of a transmitter, the apparatus comprising: a signal generator; a transmitter; and an estimator.

摘要翻译： 一种用于估计接收机和发射机的I / Q不平衡参数的装置和方法。 一种用于估计接收机的I / Q不平衡参数的装置，所述装置包括：信号发生器; 发射机 接收器 和一个估计。 一种用于估计发射机的I / Q不平衡参数的装置，所述装置包括：信号发生器; 发射机 和一个估计。

公开(公告)号：US07680197B2

公开(公告)日：2010-03-16

申请号：US10803047

申请日：2004-03-18

申请人： Der-Zheng Liu ,  Tai-Cheng Liu ,  Song-Nien Tung ,  Kuang-Yu Yen

发明人： Der-Zheng Liu ,  Tai-Cheng Liu ,  Song-Nien Tung ,  Kuang-Yu Yen

IPC分类号： H04K1/10 ,  H04L7/00

CPC分类号： H04L27/2662 ,  H04L27/2657 ,  H04L27/2675

摘要： The present invention provides an apparatus and an associated method for sampling timing compensation, which can estimate sampling frequency offset between the receiver and transmitter of a multi-carrier system according to estimated frequency responses of two consecutive received symbols within each pilot subchannel, and compensate an accumulated sampling timing offset resulted from the sampling frequency offset. When the accumulated timing offset is not large, the apparatus uses a phase rotator to compensate with a corresponding accumulated phase rotation in frequency domain. When the accumulated timing offset is large, the apparatus first compensates with a specific timing offset in time domain, and then uses the phase rotator to compensate with a phase rotation corresponding to the remaining timing offset in frequency domain. A timing controller is used to compensate with the specific timing offset by adjusting a clock generator or a cyclic prefix remover of the receiver.

摘要翻译： 本发明提供了一种用于采样定时补偿的装置和相关方法，其可以根据每个导频子信道内的两个连续接收符号的估计频率响应来估计多载波系统的接收机和发射机之间的采样频率偏移，并且对 采样频率偏移产生的累积采样定时偏移。 当累积的定时偏差不大时，该装置使用相位旋转器来对频域中相应的累积相位旋转进行补偿。 当累积的定时偏移量大时，装置首先用时域中的特定定时偏移补偿，然后使用相位旋转器对与频域中的剩余定时偏移相对应的相位旋转进行补偿。 定时控制器用于通过调整接收机的时钟发生器或循环前缀去除器来补偿特定的定时偏移。

公开(公告)号：US07684501B2

公开(公告)日：2010-03-23

申请号：US10779648

申请日：2004-02-18

申请人： Der-Zheng Liu ,  Song-Nien Tung ,  Tai-Cheng Liu ,  Kuang-Yu Yen

发明人： Der-Zheng Liu ,  Song-Nien Tung ,  Tai-Cheng Liu ,  Kuang-Yu Yen

IPC分类号： H04K1/10

CPC分类号： H04L27/2657 ,  H04L27/266 ,  H04L27/2675 ,  H04L27/2695

摘要： The present invention provides apparatus and methods for carrier frequency offset and phase compensation, which can compensate the phase rotation of an OFDM symbol resulted from carrier frequency offset between the receiver and transmitter of an OFDM System. The apparatus and method for carrier frequency offset compensation generates an estimated carrier frequency offset according to a phase error between estimated frequency responses of two consecutive received OFDM symbols within the pilot subchannel, and calculates an accumulated phase rotation, according to the estimated carrier frequency offset, for compensating the received OFDM symbol. On the other hand, the apparatus and method for phase compensation generates an estimated residual phase error according to the pilot signal of a frequency offset-compensated OFDM symbol and the original pilot signal transmitted by the transmitter, and compensates the frequency offset-compensated OFDM symbol or a following one according to the estimated residual phase error.

摘要翻译： 本发明提供了用于载波频率偏移和相位补偿的装置和方法，其可以补偿由OFDM系统的接收机和发射机之间的载波频率偏移导致的OFDM符号的相位旋转。 用于载波频率补偿的装置和方法根据导频子信道内的两个连续接收的OFDM符号的估计频率响应之间的相位误差产生估计的载波频率偏移，并且根据所估计的载波频率偏移来计算累积的相位旋转， 用于补偿接收到的OFDM符号。 另一方面，用于相位补偿的装置和方法根据频偏补偿OFDM符号的导频信号和由发射机发送的原始导频信号产生估计的残余相位误差，并且补偿频偏补偿的OFDM符号 或根据估计的残余相位误差的后一个。