公开(公告)号：US06937684B2

公开(公告)日：2005-08-30

申请号：US09970254

申请日：2001-10-02

申请人： Ching-Kae Tzou ,  Yung Ching Lin

发明人： Ching-Kae Tzou ,  Yung Ching Lin

IPC分类号： H03L7/085 ,  H04L27/00 ,  H04L27/38 ,  H03D3/24

CPC分类号： H03L7/085 ,  H04L27/3827 ,  H04L2027/003 ,  H04L2027/0057 ,  H04L2027/0067

摘要： A differential phase discriminator includes a phase compensation circuit to compensate for timing drift and error for recovering timing information in a digital phase lock loop. The differential phase discriminator uses a differential phase detector to compute the phase difference of two consecutive frequency domain signal samples. The phase compensation circuit determines a phase correction term by computing the difference between the absolute values of the real and imaginary parts of a frequency domain signal sample. A weighting factor is computed by adjusting the sum of the absolute values of the real and imaginary parts of the frequency domain signal sample with a ratio adjustment factor. A phase compensation value is then computed by multiplying the phase correction term by the weighting factor. The phase compensation value is added to the uncorrected output of the differential phase detector.

摘要翻译： 差分鉴相器包括补偿定时漂移的相位补偿电路和用于恢复数字锁相环中的定时信息的误差。 差分鉴相器使用差分相位检测器来计算两个连续频域信号样本的相位差。 相位补偿电路通过计算频域信号样本的实部和虚部的绝对值之间的差来确定相位校正项。 通过调整频域信号样本的实部和虚部的绝对值之和与比率调整因子来计算加权系数。 然后通过将相位校正项乘以加权因子来计算相位补偿值。 相位补偿值被添加到差分相位检测器的未校正输出。