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    SYMBOL TIMING RECOVERY NETWORK FOR A CARRIERLESS AMPLITUDE PHASE (CAP) SIGNAL
    4.
    发明授权
    SYMBOL TIMING RECOVERY NETWORK FOR A CARRIERLESS AMPLITUDE PHASE (CAP) SIGNAL 失效
    用于无载振幅相位（CAP）信号的符号时序恢复网络

    公开(公告)号：EP0970575B1

    公开(公告)日：2006-05-24

    申请号：EP98910180.3

    申请日：1998-03-05

    申请人： THOMSON CONSUMER ELECTRONICS, INC.

    发明人： KNUTSON, Paul, Gothard

    IPC分类号： H04L25/49

    CPC分类号： H04L25/4921 ,  H04L7/0334 ,  H04L7/0335

    摘要： A symbol timing recovery (STR) error detector (10) includes a complex multiplier (14) and a Gardner-type symbol timing error estimator (12) for operation with carrierless amplitude phase (CAP) signals. Quadrature Ir and Qr signals from the system are input to the complex multiplier, which also receives signals from a numerically controlled oscillator (16) operating at the CAP center frequency. The output of the complex multiplier is provided to the input of the Gardner STR error estimator. An added frequency shift allows the Gardner error estimator to function with CAP signals. The output from the error estimator is provided to a loop filter (110) the output of which is provided to an oscillator (112) which generates the symbol timing information (114) for a symbol sampling network (106).

    摘要翻译： 符号定时恢复（STR）误差检测器（10）包括用于利用无载波幅度相位（CAP）信号操作的复数乘法器（14）和加德纳型符号定时误差估计器（12）。 来自系统的正交Ir和Qr信号被输入到复数乘法器，复数乘法器还接收来自以CAP中心频率运行的数字控制振荡器（16）的信号。 复数乘法器的输出提供给加德纳STR误差估计器的输入。 增加的频移允许加德纳误差估计器与CAP信号一起工作。 将误差估计器的输出提供给环路滤波器（110），其输出被提供给产生符号采样网络（106）的符号定时信息（114）的振荡器（112）。

    SYMBOL TIMING RECOVERY NETWORK FOR A CARRIERLESS AMPLITUDE PHASE (CAP) SIGNAL
    5.
    发明公开
    SYMBOL TIMING RECOVERY NETWORK FOR A CARRIERLESS AMPLITUDE PHASE (CAP) SIGNAL 失效
    NETWORK FOR符号时钟恢复FOR A DELAYED LOOSE幅度 - 相位（CAP）SIGNAL

    公开(公告)号：EP0970575A1

    公开(公告)日：2000-01-12

    申请号：EP98910180.3

    申请日：1998-03-05

    申请人： THOMSON CONSUMER ELECTRONICS, INC.

    发明人： KNUTSON, Paul, Gothard

    IPC分类号： H04L25/49

    CPC分类号： H04L25/4921 ,  H04L7/0334 ,  H04L7/0335

    摘要： A symbol timing recovery (STR) error detector (10) includes a complex multiplier (14) and a Gardner-type symbol timing error estimator (12) for operation with carrierless amplitude phase (CAP) signals. Quadrature Ir and Qr signals from the system are input to the complex multiplier, which also receives signals from a numerically controlled oscillator (16) operating at the CAP center frequency. The output of the complex multiplier is provided to the input of the Gardner STR error estimator. An added frequency shift allows the Gardner error estimator to function with CAP signals. The output from the error estimator is provided to a loop filter (110) the output of which is provided to an oscillator (112) which generates the symbol timing information (114) for a symbol sampling network (106).

    COMPONENT TIMING RECOVERY SYSTEM FOR QAM
    6.
    发明公开
    COMPONENT TIMING RECOVERY SYSTEM FOR QAM 失效
    组件行程回收系统QAM

    公开(公告)号：EP0927472A1

    公开(公告)日：1999-07-07

    申请号：EP97940933.0

    申请日：1997-09-08

    申请人： THOMSON CONSUMER ELECTRONICS, INC.

    发明人： KNUTSON, Paul, Gothard ,  RAMASWAMY, Kumar ,  McNEELY, David, Lowell

    IPC分类号： H04L7 ,  H04L27

    CPC分类号： H04L7/0029 ,  H04L7/0335 ,  H04L27/38

    摘要： A receiver for a transmitted quadrature amplitude modulated (QAM) signal representing successive symbols, and including an in-phase (I) component and a quadrature (Q) component. A timing recovery system includes a source of samples (102) representing the QAM signal produced at a fixed frequency. Processing circuitry for the I component includes a first demodulator (104), coupled to the sample source, for demodulating the I component of the QAM signal to baseband; and a first interpolator (108), responsive to a control signal, for producing I component samples taken at times synchronized to the transmitted symbols. Processing circuitry for the Q component includes a second demodulator (114), also coupled to the sample source, for demodulating the Q component of the QAM signal to baseband; and a second interpolator (118), responsive to a control signal, for producing Q component samples taken at times synchronized to the transmitted symbols. A phase error detector (126) detects the phase error between the sample times of the I and Q component samples from the first and second interpolators and times of the successive transmitter symbols. A summer (130) is coupled to the phase error detector and a source of a nominal delay signal. A numerically controlled delay circuit (132), is coupled to the summer, for producing the respective control signals for the first and second interpolators.

    Signal processing system
    7.
    发明公开
    Signal processing system 失效
    Signalverarbeitungssystem

    公开(公告)号：EP0748118A3

    公开(公告)日：1998-09-16

    申请号：EP96301867

    申请日：1996-03-19

    申请人： DISCOVISION ASS

    发明人： CLAYDON ANTHONY PETER JOHN ,  GAMMACK RICHARD JOHN

    IPC分类号： H03M13/41 ,  H04L1/00 ,  H04L7/02 ,  H04L27/00 ,  H04L27/22 ,  H04L27/227 ,  H04L27/38 ,  H04N7/24 ,  H04N7/12

    CPC分类号： H04L7/0029 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0068 ,  H04L7/0334 ,  H04L7/0335 ,  H04L27/3872 ,  H04L2027/0028 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04N21/2383 ,  H04N21/4382

    摘要： A CMOS integrated signal processing system for a sampling receiver includes a timing recovery circuit, wherein an on-chip numerically controlled oscillator is operative at periods T that are initially equal to the nominal baud rate of the signals controls a sinc interpolator receiving samples at the sampling rate. A loop filter is coupled to the sinc interpolator and to the numerically controlled oscillator. The arrangement is capable of handling various symbol rates. The system includes a circuit for carrier recovery, having a second on-chip numerically controlled oscillator, a digital derotation circuit responsive to the second numerically controlled oscillator, accepting an in phase component and a quadrature component of the sampled signals. An adaptive phase error estimation circuit is coupled in a feedback loop.

    摘要翻译： 用于采样接收机的CMOS集成信号处理系统包括定时恢复电路，其中片上数字控制振荡器在初始等于信号的标称波特率的周期T处操作，控制正弦内插器在采样时接收采样 率。 环路滤波器耦合到正弦内插器和数控振荡器。 该安排能够处理各种符号率。 该系统包括用于载波恢复的电路，其具有第二片上数字控制振荡器，响应于第二数字控制振荡器的数字消旋电路，接收采样信号的同相分量和正交分量。 自适应相位误差估计电路耦合在反馈回路中。

    TAKTPHASENDETEKTOR
    8.
    发明授权
    TAKTPHASENDETEKTOR 失效
    TAKTPHASENDETEKTOR。

    公开(公告)号：EP0647376B1

    公开(公告)日：1995-11-22

    申请号：EP93912554.8

    申请日：1993-06-03

    申请人： SIEMENS AKTIENGESELLSCHAFT

    发明人： LANKL, Berthold ,  SEBALD, Georg

    IPC分类号： H04B15/00 ,  H04L27/22

    CPC分类号： H04L7/0334 ,  H04L7/0062 ,  H04L7/0335

    摘要： The invention relates to a clock phase detector for synchronous data transmission in the receiver of a data transmission system in which, in order to obtain a clock phase criterion from the received signal, two neighbouring main scanning values per symbol duration T and another intermediate scanning value midway between the two are formed. The pattern-dependent jitter is to be eliminated from such a clock phase detector. This is achieved by the invention by a modification to the Gardner process which eliminates the effects of neighbouring symbol interference on the clock phase criterion and thus reduces natural jitter.

    AN APPARATUS FOR SYNCHRONIZING A SAMPLING SIGNAL ON A COMMUNICATION SIGNAL
    10.
    发明公开
    AN APPARATUS FOR SYNCHRONIZING A SAMPLING SIGNAL ON A COMMUNICATION SIGNAL 审中-公开
    用于在通信信号上同步采样信号的装置

    公开(公告)号：EP3158677A1

    公开(公告)日：2017-04-26

    申请号：EP14747327.6

    申请日：2014-07-22

    申请人： Huawei Technologies Co., Ltd.

    发明人： STOJANOVIC, Nebojsa

    IPC分类号： H04L7/00 ,  G11B20/10 ,  H03L7/087 ,  H04B10/61

    CPC分类号： H04L7/0008 ,  H03J7/00 ,  H03L7/0807 ,  H03L7/091 ,  H04B10/61 ,  H04L7/0029 ,  H04L7/0335

    摘要： The invention relates to an apparatus (100) for synchronizing a sampling signal on a communication signal, the communication signal comprising communication symbols, the sampling signal indicating sampling time instants of the communication signal, the apparatus (100) comprising a sampler (101) being configured to sample the communication signal at the sampling time instants indicated by the sampling signal to obtain a sampled communication signal, a filter (103) being configured to filter the sampled communication signal using a first filtering transfer function to obtain a first filtered sampled communication signal, and to filter the sampled communication signal using a second filtering transfer function to obtain a second filtered sampled communication signal, a phase detector (105) being configured to determine a first phase detection signal upon the basis of the first filtered sampled communication signal, and to determine a second phase detection signal upon the basis of the second filtered sampled communication signal, the first phase detection signal indicating a position of a sampling time instant within a communication symbol of the first filtered sampled communication signal, the second phase detection signal indicating a position of a sampling time instant within a communication symbol of the second filtered sampled communication signal, a determiner (107) being configured to determine a first synchronicity measure upon the basis of the first phase detection signal, and to determine a second synchronicity measure upon the basis of the second phase detection signal, the first synchronicity measure and the second synchronicity measure indicating a synchronicity between the sampling signal and the communication signal, and a selector (109) being configured to select the first filtering transfer function or the second filtering transfer function of the filter (103) for filtering the sampled communication signal upon the basis of the first synchronicity measure and the second synchronicity measure for synchronizing the sampling signal on the communication signal.

    摘要翻译： 本发明涉及一种用于同步通信信号上的采样信号的装置（100），所述通信信号包括通信符号，所述采样信号指示所述通信信号的采样时刻，所述装置（100）包括采样器（101） ，被配置为在由采样信号指示的采样时刻对通信信号进行采样以获得采样的通信信号;滤波器（103），被配置为使用第一滤波传递函数对采样的通信信号进行滤波以获得第一滤波采样通信信号 并且使用第二滤波传递函数对采样的通信信号进行滤波以获得第二滤波采样通信信号;相位检测器（105），其被配置为基于第一滤波采样通信信号来确定第一相位检测信号;以及 根据秒确定第二相位检测信号 所述第一相位检测信号指示所述第一滤波采样通信信号的通信符号内的采样时刻的位置，所述第二相位检测信号指示所述第一滤波采样通信信号的通信符号内的采样时刻的位置 第二滤波采样通信信号;确定器（107），被配置为基于第一相位检测信号确定第一同步性度量，并且基于第二相位检测信号确定第二同步性度量，第一同步性度量 并且所述第二同步性度量指示所述采样信号与所述通信信号之间的同步性;以及选择器（109），被配置为选择所述滤波器（103）的所述第一滤波传递函数或所述第二滤波传递函数，以对所述采样通信信号 根据第一次同步性测量 并且第二同步度量用于同步通信信号上的采样信号。