利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

18 条记录 (耗时 0.02 秒)

    ROBUST WIDEBAND SYMBOL AND FRAME SYNCHRONIZER FOR POWER-LINE COMMUNICATION
    2.
    发明公开
    ROBUST WIDEBAND SYMBOL AND FRAME SYNCHRONIZER FOR POWER-LINE COMMUNICATION 审中-公开
    ROBUSTER BREITBAND-SYMBOL- UND RAHMENSYNCHRONISIERERFÜRDIE NETZKOMMUNIKATION

    公开(公告)号：EP2297867A2

    公开(公告)日：2011-03-23

    申请号：EP09759587.0

    申请日：2009-06-05

    申请人： Maxim Integrated Products Inc.

    发明人： RAZAZIAN, Kaveh ,  UMARI, Maher ,  LOGINOV, Victor, V.

    IPC分类号： H04B3/54 ,  H04L27/26

    CPC分类号： H04B3/54 ,  H04B2203/5408 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0228 ,  H04L25/08 ,  H04L27/2605 ,  H04L27/2656 ,  H04L27/2662 ,  H04L27/2665

    摘要： An embodiment is a method and apparatus to perform symbol synchronization. A sign element obtains signs of samples in a sample vector. A correlation estimator computes a correlation of the sample vector. A synchronization detector detects symbol synchronization. Another embodiment is a method and apparatus to perform frame synchronization. A Fast Fourier Transform (FFT) processing unit computes a current FFT vector and an accumulated previous FFT vector. The current FFT vector and the accumulated previous FFT vector correspond to sample vectors associated with preamble symbols prior to symbol synchronization detection. A real and imaginary processing unit generates real and imaginary summations using the current FFT vector and the accumulated previous FFT vector. A mode processor generates mode flags representing operational modes using the real and imaginary summations.

    摘要翻译： 实施例是执行符号同步的方法和装置。 符号元素在样本向量中获取样本的符号。 相关估计器计算样本矢量的相关性。 同步检测器检测符号同步。 另一实施例是执行帧同步的方法和装置。 快速傅里叶变换（FFT）处理单元计算当前FFT矢量和累积的先前FFT矢量。 当前FFT矢量和累积的先前FFT矢量对应于在符号同步检测之前与前导符号相关联的采样矢量。 实数和虚拟处理单元使用当前FFT向量和累积的先前FFT向量生成实和求和。 模式处理器使用实数和虚拟求和来生成表示操作模式的模式标志。

    BLIND CHANNEL QUALITY ESTIMATOR
    7.
    发明公开
    BLIND CHANNEL QUALITY ESTIMATOR 有权
    BLINDKANAL-QUALITÄTSSCHÄTZER

    公开(公告)号：EP2297866A1

    公开(公告)日：2011-03-23

    申请号：EP09759578.9

    申请日：2009-06-05

    申请人： Maxim Integrated Products Inc.

    发明人： KAMALIZAD, Amir, Hosein ,  RAZAZIAN, Kaveh ,  UMARI, Maher

    IPC分类号： H04B3/54 ,  H04L1/20 ,  H04L27/26

    CPC分类号： H04B3/54 ,  H04L1/0009 ,  H04L1/206 ,  H04L25/0202 ,  H04L25/03006 ,  H04L27/22 ,  H04L27/2647

    摘要： An embodiment is a method and apparatus to estimate channel quality. An absolute processor computes absolute real and imaginary values of real and imaginary parts, respectively, of output of a demodulator. A phase count unit generates first and second phase counts representing deviations from zero phase noise using the absolute real and imaginary values. An amplitude count unit generates first and second amplitude counts representing attenuation of a received signal using the absolute real and imaginary values. An integrator integrates the first and second phase counts and first and second amplitude counts into a signal quality indicator that represents a measure of quality of channel with respect to noise and fading.