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29 条记录 (耗时 0.015 秒)

    Method and apparatus for symbol timing recovery
    4.
    发明授权
    Method and apparatus for symbol timing recovery 有权
    用于符号定时恢复的方法和装置

    公开(公告)号：US08687747B2

    公开(公告)日：2014-04-01

    申请号：US13320128

    申请日：2010-05-28

    申请人： Paul Gothard Knutson ,  Dirk Schmitt ,  Wen Gao

    发明人： Paul Gothard Knutson ,  Dirk Schmitt ,  Wen Gao

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L27/2678 ,  H04H40/90 ,  H04L7/0062 ,  H04L7/042 ,  H04L7/10 ,  H04L27/0014 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2679 ,  H04L2027/0053 ,  H04L2027/0067 ,  H04W56/005

    摘要： Methods and apparatus for symbol timing recovery are provided. Both a coarse symbol timing recovery method and apparatus, and a fine symbol timing recovery method and apparatus are described which can be used jointly for symbol recovery, for example in phase shift keying receivers. The coarse method involves the use of differential correlations and finding the time difference in peak values of the correlation results. The fine method involves interpolation of a received digital signal, followed by filtering and timing error detection. The error detection signal is further filtered and used to control the interpolator. The methods provide for robust symbol timing synchronization.

    摘要翻译： 提供了符号定时恢复的方法和装置。 描述了粗符号定时恢复方法和装置以及可以联合用于符号恢复的精细符号定时恢复方法和装置，例如在相移键控接收机中。 粗略方法涉及使用差分相关性，并找出相关结果峰值的时间差。 精细的方法包括对接收到的数字信号进行插值，然后进行滤波和定时误差检测。 误差检测信号被进一步滤波并用于控制内插器。 这些方法提供鲁棒符号定时同步。

    Method and Arrangement for Recovering a Binary DC-Free Code From a Frequency Modulated Signal
    6.
    发明申请
    Method and Arrangement for Recovering a Binary DC-Free Code From a Frequency Modulated Signal 审中-公开
    从调频信号中恢复二进制无DC码的方法和装置

    公开(公告)号：US20090052592A1

    公开(公告)日：2009-02-26

    申请号：US11918157

    申请日：2006-04-04

    申请人： Dirk Schmitt ,  Alkis Ikonomu ,  Marten Kabutz

    发明人： Dirk Schmitt ,  Alkis Ikonomu ,  Marten Kabutz

    IPC分类号： H04L27/06

    CPC分类号： H04L27/1525 ,  H04L27/1566

    摘要： The invention is related to a method and an arrangement for recovering a binary DC-free code from a frequency-modulated signal, without any analog signal demodulation of the frequency-modulated signal. The invention relates more particularly to an ATIP bi-phase channel bit and timing recovery in a deteriorated wobble channel as e.g. required for high speed recording on optical storage media. The arrangement comprises a digital phase lock loop and a phase detector uses a phase trellis and a maximum likelihood detection is applied to the phase trellis for providing a bi-phase channel bit signal and a bi-phase clock signal, which is in time with the sampling point for the bi-phase channel bit signal for recovering said binary code. The invention is also applicable for further data transmission systems based on frequency modulation as e.g. modem or wireless data communication systems.

    摘要翻译： 本发明涉及一种用于从频率调制信号中恢复二进制无DC码的方法和装置，而无需调频信号的任何模拟信号解调。 本发明更具体地涉及ATIP双相通道位和劣化摆动通道中的定时恢复。 在光存储介质上进行高速录制所需的。 该装置包括数字锁相环，相位检测器使用相位网格，并且将最大似然检测应用于相位网格，以提供双相通道位信号和双相时钟信号，该双相通道位信号和 用于恢复所述二进制码的双相通道位信号的采样点。 本发明也适用于基于频率调制的另外的数据传输系统。 调制解调器或无线数据通信系统。