公开(公告)号：US20060045223A1

公开(公告)日：2006-03-02

申请号：US11213711

申请日：2005-08-30

申请人： Kaoru Takamatsu

发明人： Kaoru Takamatsu

IPC分类号： H04L7/00

CPC分类号： H04L7/0054

摘要： To provide a technique for regenerating a symbol clock based on a digital modulation signal in which the symbol timing is accurately detected without need of using a synchronization word. A symbol clock regenerating apparatus comprises symbol value acquisition means 1, 2 for acquiring a symbol value at a sampling timing with a sampling clock having a frequency m times (m is an integer of 3 or greater) that of a symbol clock to be regenerated, based on a digital modulation signal, arithmetic operation means 4 for calculating an arithmetic operation value indicating whether or not each symbol value sequentially acquired is the same as the preceding symbol value, buffer means 4 for sequentially storing each arithmetic operation value sequentially calculated in a buffer of n rows (n is an integer of one or greater) and m columns, and timing detection means 7 for detecting the symbol timing based on the sampling timing corresponding to each column of the buffer and the arithmetic operation values accumulated in the buffer.

公开(公告)号：US07480359B2

公开(公告)日：2009-01-20

申请号：US11213711

申请日：2005-08-30

申请人： Kaoru Takamatsu

发明人： Kaoru Takamatsu

IPC分类号： H04L7/00

CPC分类号： H04L7/0054

摘要： To provide a technique for regenerating a symbol clock based on a digital modulation signal in which the symbol timing is accurately detected without need of using a synchronization word.A symbol clock regenerating apparatus comprises symbol value acquisition means 1, 2 for acquiring a symbol value at a sampling timing with a sampling clock having a frequency m times (m is an integer of 3 or greater) that of a symbol clock to be regenerated, based on a digital modulation signal, arithmetic operation means 4 for calculating an arithmetic operation value indicating whether or not each symbol value sequentially acquired is the same as the preceding symbol value, buffer means 4 for sequentially storing each arithmetic operation value sequentially calculated in a buffer of n rows (n is an integer of one or greater) and m columns, and timing detection means 7 for detecting the symbol timing based on the sampling timing corresponding to each column of the buffer and the arithmetic operation values accumulated in the buffer.

摘要翻译： 提供一种基于数字调制信号来重新生成符号时钟的技术，其中在不需要使用同步字的情况下准确检测符号定时。 符号时钟再现装置包括：符号值获取装置1,2，用于以具有要再生的符号时钟的频率m倍（m为3或更大的整数）的采样时钟获取采样定时的符号值; 基于数字调制信号的算术运算装置4，用于计算指示顺序获取的每个符号值是否与先前符号值相同的算术运算值;缓冲装置4，用于顺序地存储在缓冲器中顺序计算的每个算术运算值 n行（n为1以上的整数）和m列，以及定时检测单元7，用于根据对应于缓冲器的各列的采样定时和累加在缓冲器中的算术运算值，检测符号定时。