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user 73
In signal processing, a filter is a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
17
votes
5
answers
2k
views
What factors should I consider when choosing an IIR filter realization?
IIR filters may be implemented as direct form 1 or 2. But how do you decide which form to use? What are the pros and cons of each? …
- 1,069
22
votes
5
answers
4k
views
Why would I leave a signal oversampled?
I can't think of a better way for asking this question so I will start with an example. Suppose that I have an input signal with a max frequency of 50Hz (sampled at 100Hz). Now the signals of interest …
- 1,069
21
votes
3
answers
13k
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How does cascading biquad sections for higher order filters work?
I'm trying to implement an 8th order IIR filter and every application note and textbook I've read says that it is best to implement any filter of order more than 2 as second order sections. I used tf2 …
- 1,069