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1. 发明申请

US20020138531A1 Systems and methods for a partial sum digital fir filter 有权
标题翻译：部分和数字数字冷杉滤波器的系统和方法
公开(公告)号：US20020138531A1
公开(公告)日：2002-09-26
申请号：US09777622
申请日：2001-02-05
申请人： Conexant Systems, Inc.
发明人： Benjamin E. Felts III , Wilson Wang
IPC分类号： G06F017/10
CPC分类号： H03H17/06 , H03H17/0227
摘要： A digital FIR filter is provided that inputs a series of data samples xnull0null . . . xnullnnull and generates a partial sum output PSnullinull, where inulln. The partial sum output is a weighted version of the a difference between a partial sum of the previous inull1 data samples, PSnullinull1null, and the current data sample xnullnnull added to the current data sample xnullnnull. The filter includes a plurality of weighting stages. Each weighting stage includes a first adder for subtracting the current data sample xnullnnull from the previous partial sum PSnullinull1null, a multiplier that multiplies the difference by a weighting coefficient, and a second adder that sums the weighted difference with the current data sample. The filter also includes a plurality of delay elements, each of which inputs a partial sum and imposes a unit delay on the partial sum before supplying it to a weighting stage.
摘要翻译：提供了一个数字FIR滤波器，输入一系列数据样本x [0]。。。 x [n]并产生部分和输出PS [i]，其中i <= n。部分和输出是先前i-1个数据采样的部分和之间的差的加权版本，PS [i-1]和添加到当前数据样本x [n ]。滤波器包括多个加权级。每个加权级包括第一加法器，用于从先前的部分和PS [i-1]中减去当前数据样本x [n]，乘法器将该差乘以加权系数，第二加法器将加权差与当前数据样本。滤波器还包括多个延迟元件，每个延迟元件输入部分和，并且在将其提供给加权级之前对该部分和施加单位延迟。

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