公开(公告)号：US08223827B2

公开(公告)日：2012-07-17

申请号：US10839784

申请日：2004-05-05

申请人： Jonathan James Ashley ,  Keenan Terrell O'Brien ,  Richard Rauschmayer ,  Sumeet Sanghvi ,  Anne Q. Ye ,  Kaichi Zhang

发明人： Jonathan James Ashley ,  Keenan Terrell O'Brien ,  Richard Rauschmayer ,  Sumeet Sanghvi ,  Anne Q. Ye ,  Kaichi Zhang

IPC分类号： H03K5/159

CPC分类号： H03H17/0294

摘要： A method and apparatus are provided for determining a plurality of filter tap weights or biases (or both) for a noise predictive filter used to generate one or more signal dependent branch metrics. A filter tap weight or filter bias (or both) are adaptively accumulated for each possible data condition. The data conditions may comprise, for example, each possible data pattern for a given data dependency length. The appropriate accumulated filter tap weight or bias to update can be selected based on a data condition associated with the current received data. The filter tap weights associated with a delay 0 tap can be adapted for each filter condition except for a single normalizing condition, whose corresponding delay 0 tap remains fixed.

摘要翻译： 提供了一种用于确定用于生成一个或多个信号相关分支量度的噪声预测滤波器的多个滤波器抽头权重或偏差（或两者）的方法和装置。 对于每个可能的数据条件，自适应地累积滤波器抽头权重或滤波器偏置（或两者）。 数据条件可以包括例如给定数据依赖性长度的每个可能的数据模式。 可以基于与当前接收到的数据相关联的数据条件来选择适当的累积滤波器抽头权重或要更新的偏置。 与延迟0抽头相关联的滤波器抽头权重可以适用于每个滤波器条件，除了单个归一化条件，其相应的延迟0抽头保持固定。