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    • 49. 发明授权
    • Compensation for non-linear distortion in a modem receiver
    • 调制解调器接收机中非线性失真的补偿
    • US07173966B2
    • 2007-02-06
    • US10842623
    • 2004-05-10
    • William J. Miller
    • William J. Miller
    • H03H7/30
    • H04L27/3809H04K1/00H04L7/042H04L25/03159H04L25/03343H04L25/14H04L27/0004H04L27/2334H04L2025/03617H04L2025/03656
    • A method and modem receiver for receiving serial data from a transmission link, for recovering data from the received data, and for synchronizing the receiver timing to that of the transmitter are disclosed. A receiver equalizer includes a filter and quantizer in the forward path and a feedback circuit connecting the quantizer output to the filter input. A measuring circuit is used to initialize the feedback circuit. The receiver filter, provided as a QMF wavelet filter bank, is implemented in one embodiment with a form of polyphase filtering followed by four M/2-point FFTs. The quantizer recovers data symbols and provides a quantization error feedback signal. The measuring circuit provides an approximation of phase and amplitude of isolated wavelets.
    • 公开了一种用于从传输链路接收串行数据的方法和调制解调器接收器,用于从所接收的数据中恢复数据,并且用于使接收机定时与发射机的定时同步。 接收机均衡器包括前向路径中的滤波器和量化器以及将量化器输出连接到滤波器输入端的反馈电路。 测量电路用于初始化反馈电路。 作为QMF小波滤波器组提供的接收机滤波器在一个实施例中以多相滤波的形式实现,随后是四个M / 2点FFT。 量化器恢复数据符号并提供量化误差反馈信号。 测量电路提供孤立小波的相位和幅度近似。
    • 50. 发明授权
    • Compensation for non-linear distortion in a modem receiver
    • 调制解调器接收机中非线性失真的补偿
    • US06735264B2
    • 2004-05-11
    • US09943697
    • 2001-08-31
    • William J. Miller
    • William J. Miller
    • H04L2706
    • H04L27/0004H04L25/03343H04L25/14
    • A method and modem for communicating serial input data over a transmission link are disclosed. Serial input data is partitioned into parallel data elements prior to rotation by an invertible linear mapping. Computationally efficient multi-rate wavelet filter banks are employed in a receiver for analyzing a received signal. Self-interference components are calculated in the receiver per sub-band and tap-weights for the filter banks are derived as a function over the range of self-interference values. A weighted sum is formed and subtracted from the delayed, received signal to eliminate the interference, and is removed from the recovered signal.
    • 公开了一种通过传输链路传送串行输入数据的方法和调制解调器。 串行输入数据在通过可逆线性映射旋转之前被划分为并行数据元素。 在接收机中采用计算效率高的多速率小波滤波器组来分析接收到的信号。 在每个子带的接收机中计算自干扰分量,并且将滤波器组的抽头重量作为自干涉值范围的函数导出。 形成加权和并从延迟的接收信号中减去加权和以消除干扰,并从恢复的信号中去除。