Fully digital symbol synchronization technique
    1.
    发明授权
    Fully digital symbol synchronization technique 有权
    全数字符号同步技术

    公开(公告)号:US06799193B2

    公开(公告)日:2004-09-28

    申请号:US10022465

    申请日:2001-12-14

    IPC分类号: G06F1715

    CPC分类号: H04L7/042 H04L7/08

    摘要: One aspect of the invention provides a novel scheme to synchronize signal reception for a receiver device. In one embodiment, multi-symbol correlation of a first signal and a reference signal is performed. The reference signal corresponds to symbols denoting a synchronization or alignment marker. For every first signal sample, an indication of the degree of similarity between a plurality of the first signal symbols and reference signal symbols is generate as a second signal. This second signal is then nonlinearly processed, linearly processed, and then nonlinearly processed over time to determine if indications of high degrees of correlation occur at periodic intervals. If so, then these are considered synchronization markers and are used to synchronize signal reception of the receiver device.

    摘要翻译: 本发明的一个方面提供了一种用于使接收机设备的信号接收同步的新方案。 在一个实施例中,执行第一信号和参考信号的多符号相关。 参考信号对应于表示同步或对准标记的符号。 对于每个第一信号样本,生成多个第一信号符号和参考信号符号之间的相似程度的指示作为第二信号。 然后对该第二信号进行非线性处理,线性处理,然后随时间非线性处理,以确定是否在周期性间隔发生高度相关的指示。 如果是这样,那么这些被认为是同步标记,并且用于同步接收器设备的信号接收。

    Wideband symbol synchronization in the presence of multiple strong narrowband interference
    2.
    发明授权
    Wideband symbol synchronization in the presence of multiple strong narrowband interference 有权
    宽带符号同步存在多个强窄带干扰

    公开(公告)号:US06912262B1

    公开(公告)日:2005-06-28

    申请号:US09939424

    申请日:2001-08-24

    摘要: A method and apparatus for time-shift extraction in a wideband transmitted signal containing strong narrowband interference or noise. The time-shift extraction is based on the time domain and frequency domain relation of symbol misalignment. The invention uses the sign of the product of a recieved signal sample and a reference symbol in the frequency domain to determine the time-shift. It does not rely on the signal magnitude and is therefore less dependent on the signal gain. It also does not rely on the soft phase values, which have ambiguity for values more than three hundred sixty (360) degrees.

    摘要翻译: 一种用于在包含强窄带干扰或噪声的宽带发射信号中进行时移提取的方法和装置。 时移提取是基于符号未对准的时域和频域关系。 本发明使用接收信号样本和频域中的参考符号的乘积的符号来确定时移。 它不依赖于信号幅度,因此较少依赖于信号增益。 它也不依赖于软相位值,它们对于超过三百六十(360)度的值具有模糊性。