Tue Mar 19 14:04:48 EDT 2013
Impulse-invariant high-pass filter: what does it mean?
An interesting conceptual problem: it is possible to define the
behavior of a low pass filter based on the impulse-invariant transform
The same doesn't work for a high-pass filter, since the high pass band
will alias down into the stopbad, killing the high-pass property.
So, how should it be implemented? Maybe it only makes sense using a