The second filter we designed was Chebyshev filter. BLT was
used for converting the the generated analog Chebyshev filter to digital iir
Chebyshev filter.
It was noticed that in output magnitude response, there is ripple in pass band with the total number of valleys and peaks equal to order of the filter.
The magnitude response that in the stop band, however, was monotonic (smooth). From the pole zero plot we come to a conclusion that digital Chebyshev filter poles lie inside the unit circle making it stable.
It was noticed that in output magnitude response, there is ripple in pass band with the total number of valleys and peaks equal to order of the filter.
The magnitude response that in the stop band, however, was monotonic (smooth). From the pole zero plot we come to a conclusion that digital Chebyshev filter poles lie inside the unit circle making it stable.
code:
Thanks for sharing about this topic and the source code!
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ReplyDeleteThe above filter can be designed using impulse invariant method
ReplyDeleteChebyshev filters have the property that they minimize the error between the idealized and the actual filter characteristic over the range of the filter,but with ripples in the passband.
ReplyDeleteThanks for sharing that varad
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