FrequencyTransformation

FrequencyTransformation[h] returns a 2D circularly symmetric impulse response given a 1D linear-phase FIR filter h.

FrequencyTransformation uses the McClellan transformation [McC73a].

See also User's Guide 9.4.

Example

This loads the package.

In[1]:=

Here we plot the magnitude response of a simple lowpass filter.

In[2]:=

Out[2]=

Out[2]=

Here we transform the 1D filter into a 2D circularly symmetric filter.

In[3]:=

Here is a plot of the magnitude response of the 2D filter.

In[4]:=

Out[4]=

Out[4]=

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