property sdr.Decimator.polyphase_taps : ndarray

The polyphase feedforward taps hi,j.

Notes

The prototype feedforward taps hi are the feedforward taps of the FIR filter before polyphase decomposition. The polyphase feedforward taps hi,j are the feedforward taps of the FIR filter after polyphase decomposition.

The polyphase feedforward taps hi,j are related to the prototype feedforward taps hi by

hi,j=hi+jr.

Examples

In [1]: fir = sdr.Decimator(3, np.arange(10))

In [2]: fir.taps
Out[2]: array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])

In [3]: fir.polyphase_taps
Out[3]: 
array([[0, 3, 6, 9],
       [1, 4, 7, 0],
       [2, 5, 8, 0]])