Math Meth Sig Proc
Math Meth Sig Proc EECS 551
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This 1 page Class Notes was uploaded by Ophelia Ritchie on Thursday October 29, 2015. The Class Notes belongs to EECS 551 at University of Michigan taught by Staff in Fall. Since its upload, it has received 23 views. For similar materials see /class/231542/eecs-551-university-of-michigan in Engineering Computer Science at University of Michigan.
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Date Created: 10/29/15
MULTIRATE FILTERING HOW IT MAKES DSP EASIER GIVEN Signal bandlimited to 10kHz sampled at fNqust 210kHz 20kHz WANT To low pass lter LPF to 100Hz 1 ifO lt m lt 95Hz SPECS Hf any if 95Hz lt lfl lt100Hz 0 if 100Hz lt m lt 10kHz Note transztzon wzdth i sharp lter maximum freq 104 IDEA lOkHz After LPF can i 100 smce Hon 100 Recall LPF followed by i 100 is decimation If decimate in stages can use shorter lters gtmuch less computation and storage For example decimate by 10 tWice FIRST STAGE DECIMATION gt gti 10 gt Where 1 ifO lt m lt 95Hz H1f any if 95Hz lt lfl lt1905Hz 0 if 1905Hz lt m lt 10kHz 1 trans39ztzon wzdth 18140 lter mazmmum freq 10 1905 20 95 1810 1905 95
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