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    Fast acquisition of frame timing and frequency
    3.
    发明公开
    Fast acquisition of frame timing and frequency 审中-公开
    Schnelle Erfassung von Rahmentakt- und-frequenz

    公开(公告)号：EP2615770A2

    公开(公告)日：2013-07-17

    申请号：EP12192244.7

    申请日：2012-11-12

    申请人： Gilat Satellite Networks, Ltd.

    发明人： Ram, Uzi ,  Levitsky, Michael ,  Bialer, Oded ,  Levitas, Guy

    IPC分类号： H04L7/04 ,  H04L27/00 ,  H04B7/185

    CPC分类号： H04L7/042 ,  H04L27/0014 ,  H04L2027/0026 ,  H04L2027/0087

    摘要： Modern digital signals include framing. A known sequence of transmission symbols (Unique Word (UW)) included in the transmitted signal may be used by a receiver for framing synchronization. A receiver configured to receive such a signal may be configured to detect the UW even when the signal is received with some frequency uncertainty (e.g. offset or error). A method is presented for fast acquisition of symbol and/or frame timing of a signal, including in the presence of frequency uncertainty. In some embodiments, the presented method may be used for determining a frequency offset of the received signal and a location of a unique word (UW) within a frame of the received signal, wherein said determining is based on a two-dimensional search map.

    摘要翻译： 现代数字信号包括框架。 包含在发送信号中的已知的发送符号序列（唯一字（UW））可以被接收机用于成帧同步。 配置为接收这样的信号的接收机可以被配置为即使在以一些频率不确定性（例如偏移或误差）接收到信号时也检测UW。 提出了一种用于快速获取信号的符号和/或帧定时的方法，包括在存在频率不确定性的情况下。 在一些实施例中，所呈现的方法可以用于确定接收信号的频率偏移和在接收信号的帧内的唯一字（UW）的位置，其中所述确定基于二维搜索映射。

    CORRELATION-DRIVEN ADAPTATION OF FREQUENCY CONTROL FOR A RF RECEIVER DEVICE
    5.
    发明授权
    CORRELATION-DRIVEN ADAPTATION OF FREQUENCY CONTROL FOR A RF RECEIVER DEVICE 有权
    FOR A RF接收器设备变频控制相关制导适应

    公开(公告)号：EP2179506B1

    公开(公告)日：2011-01-26

    申请号：EP08807856.3

    申请日：2008-09-30

    申请人： ST Wireless SA

    发明人： BOUYAUD, Mickael ,  D'ALESSANDRO, Pierluigi

    IPC分类号： H03J7/04 ,  H04B1/707

    CPC分类号： H04B1/712 ,  H04B1/7117 ,  H04L27/0014 ,  H04L2027/0065 ,  H04L2027/0069 ,  H04L2027/0081 ,  H04L2027/0087

    摘要： The present invention relates to a frequency-control unit (310) for use in controlling an external controllable reference- frequency source. The frequency-control unit comprises a filter unit (314) with a controllable filter parameter (k), which is configured to derive, using the filter parameter, from a frequency-error signal (FOE) a frequency-control signal (FOC) for minimizing the frequency error of the reference frequency; and a correlation unit (314.3), which is configured to determine from frequency errors (FOE) of the reference frequency at different points in time (n, n+1) a correlation measure indicative of a correlation between the frequency errors (FOE) at the different points in time. The frequency-control unit is configured to adapt the controllable filter parameter (k) of the filter unit in dependence on the determined correlation measure. In particular embodiments presented, the value of the filter parameter (k) depends also on a receiver path strength, such as a RSCP value.

    CORRELATION-DRIVEN ADAPTATION OF FREQUENCY CONTROL FOR A RF RECEIVER DEVICE
    6.
    发明公开
    CORRELATION-DRIVEN ADAPTATION OF FREQUENCY CONTROL FOR A RF RECEIVER DEVICE 有权
    FOR A RF接收器设备变频控制相关制导适应

    公开(公告)号：EP2179506A1

    公开(公告)日：2010-04-28

    申请号：EP08807856.3

    申请日：2008-09-30

    申请人： ST Wireless SA

    发明人： BOUYAUD, Mickael ,  D'ALESSANDRO, Pierluigi

    IPC分类号： H03J7/04 ,  H04B1/707

    CPC分类号： H04B1/712 ,  H04B1/7117 ,  H04L27/0014 ,  H04L2027/0065 ,  H04L2027/0069 ,  H04L2027/0081 ,  H04L2027/0087

    摘要： The present invention relates to a frequency-control unit (310) for use in controlling an external controllable reference- frequency source. The frequency-control unit comprises a filter unit (314) with a controllable filter parameter (k), which is configured to derive, using the filter parameter, from a frequency-error signal (FOE) a frequency-control signal (FOC) for minimizing the frequency error of the reference frequency; and a correlation unit (314.3), which is configured to determine from frequency errors (FOE) of the reference frequency at different points in time (n, n+1) a correlation measure indicative of a correlation between the frequency errors (FOE) at the different points in time. The frequency-control unit is configured to adapt the controllable filter parameter (k) of the filter unit in dependence on the determined correlation measure. In particular embodiments presented, the value of the filter parameter (k) depends also on a receiver path strength, such as a RSCP value.