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    • 12. 发明授权
    • Apparatus and method for compensating for phase jump of reference signal in digital phase-locked loop/frequency-locked loop
    • 数字锁相环/锁频环参考信号相位跳变补偿装置及方法
    • US07945010B2
    • 2011-05-17
    • US12032033
    • 2008-02-15
    • Seung-Woo Shin
    • Seung-Woo Shin
    • H04L7/00
    • H03L7/085
    • An apparatus and method for compensating for a phase jump of a reference signal in a digital Phase-Locked Loop (PLL)/Frequency-Locked Loop (FLL) are provided. The apparatus includes a phase discriminator for comparing a phase of an external clock signal (i.e., the reference signal) with a phase of an internal clock signal to determine a phase difference between the two signals, a phase jump compensator for detecting a phase jump moment by using the phase difference, for estimating a previous phase jump value according to a current phase difference upon detecting a phase jump, and for correcting the phase difference by using a phase jump correction value obtained in the estimation process, and a Low Pass Filter (LPF) for filtering a high-frequency component of the corrected phase difference. Accordingly, reliable synchronization can be achieved over an E1/T1 network.
    • 提供了用于补偿数字锁相环(PLL)/频率锁定环(FLL)中的参考信号的相位跳变的装置和方法。 该装置包括用于将外部时钟信号(即,参考信号)的相位与内部时钟信号的相位进行比较以确定两个信号之间的相位差的相位鉴别器,用于检测相位跳跃时刻的相位跳变补偿器 通过使用相位差,在检测到相位跳变时,根据当前的相位差估计上一个相位跳变值,并且通过使用在估计处理中获得的相位跳变校正值来校正相位差,以及低通滤波器 LPF),用于对校正的相位差的高频分量进行滤波。 因此,可以通过E1 / T1网络实现可靠的同步。
    • 15. 发明授权
    • Apparatus and method for timing synchronization in a communication system
    • 在通信系统中定时同步的装置和方法
    • US08472370B2
    • 2013-06-25
    • US12658038
    • 2010-02-01
    • Seung-Woo ShinKi-Hyun Kim
    • Seung-Woo ShinKi-Hyun Kim
    • H04J3/08
    • H04J3/0644H04J3/0682H04L43/0852
    • An apparatus is capable of restoring a clock of a second node in a communication system with a symmetric network construction of a first node that is capable of receiving a Global Positioning System (GPS) signal, and the second node that is not capable of receiving a GPS signal. The method includes identifying synchronization information received from the first node, determining a delay with the first node, generating a clock using the synchronization information and delay, removing a clock phase being out of a reference range in a phase identification interval, dividing the phase identification interval into at least two subdivision intervals, and removing a clock phase being out of a normal operation range of a phase in each subdivision interval.
    • 一种装置能够恢复具有能够接收全球定位系统(GPS)信号的第一节点的对称网络结构的通信系统中的第二节点的时钟,以及不能够接收 GPS信号。 该方法包括:识别从第一节点接收的同步信息,确定与第一节点的延迟,使用同步信息和延迟生成时钟,在相位识别间隔中移除时钟相位超出参考范围,将相位识别 间隔到至少两个细分间隔,并且去除在每个细分间隔中的相位的正常操作范围之外的时钟相位。
    • 19. 发明申请
    • APPARATUS AND METHOD FOR COMPENSATING FOR PHASE JUMP OF REFERENCE SIGNAL IN DIGITAL PHASE-LOCKED LOOP/FREQUENCY-LOCKED LOOP
    • 用于补偿数字相位锁定环路中的参考信号的相位抖动的装置和方法
    • US20080198958A1
    • 2008-08-21
    • US12032033
    • 2008-02-15
    • Seung-Woo Shin
    • Seung-Woo Shin
    • H03D3/24
    • H03L7/085
    • An apparatus and method for compensating for a phase jump of a reference signal in a digital Phase-Locked Loop (PLL)/Frequency-Locked Loop (FLL) are provided. The apparatus includes a phase discriminator for comparing a phase of an external clock signal (i.e., the reference signal) with a phase of an internal clock signal to determine a phase difference between the two signals, a phase jump compensator for detecting a phase jump moment by using the phase difference, for estimating a previous phase jump value according to a current phase difference upon detecting a phase jump, and for correcting the phase difference by using a phase jump correction value obtained in the estimation process, and a Low Pass Filter (LPF) for filtering a high-frequency component of the corrected phase difference. Accordingly, reliable synchronization can be achieved over an E1/T1 network.
    • 提供了用于补偿数字锁相环(PLL)/频率锁定环(FLL)中的参考信号的相位跳变的装置和方法。 该装置包括用于将外部时钟信号(即,参考信号)的相位与内部时钟信号的相位进行比较以确定两个信号之间的相位差的相位鉴别器,用于检测相位跳跃时刻的相位跳变补偿器 通过使用相位差,在检测到相位跳变时,根据当前的相位差估计上一个相位跳变值,并且通过使用在估计处理中获得的相位跳变校正值来校正相位差,以及低通滤波器 LPF),用于对校正的相位差的高频分量进行滤波。 因此,可以通过E 1 / T 1网络实现可靠的同步。