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1. 发明申请

US20160079960A1 Fast FIR Filtering Technique for Multirate Filters 有权
标题翻译：多速率滤波器的快速FIR滤波技术
公开(公告)号：US20160079960A1
公开(公告)日：2016-03-17
申请号：US14799950
申请日：2015-07-15
申请人： Vecima Networks Inc.
发明人： Brian Berscheid , Aroutchelvame Mayilavelane
IPC分类号： H03H17/06
CPC分类号： H03H17/0621 , H03H17/0275 , H03H2017/0247
摘要： Data samples are filtered by using a digital filter where the length of an impulse response of the digital filter is finite, an impulse response of the digital filter is symmetric and the operation of the digital filter is multi-rate. The method uses a polyphase decomposition to break down the input data stream into N parallel substreams and the multi-rate digital filter is separated by a polyphase decomposition into multiple lower-rate sub-filters where each of the sub-filters is separated into a set of simpler sub-sub-filters which operate upon the same set of input samples and which have impulse responses which are jointly centro-symmetric, a set of pre-filtering arithmetic structures, and a set of post-filtering arithmetic structures and performing each such pair of sub-sub-filtering operations using a single shared filter structure, a set of pre-filtering combining adders, and a set of post-filtering separating adders.
摘要翻译：通过使用数字滤波器的数字滤波器的脉冲响应的长度是有限的数字滤波器来滤波数据样本，数字滤波器的脉冲响应是对称的，并且数字滤波器的操作是多速率的。该方法使用多相分解将输入数据流分解成N个并行子流，多速率数字滤波器被多相分解分离成多个低速子滤波器，其中每个子滤波器被分成一组更简单的子子滤波器，其操作在相同的输入样本集合上，并且具有共同中心对称的脉冲响应，一组预滤波运算结构，以及一组后滤波运算结构，并且执行每一个使用单个共享过滤器结构的一对子子过滤操作，一组预过滤组合加法器以及一组后置过滤分离加法器。

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