polyphase_filter
Creation of a polyphase decimation filter structure
Calling sequence
H = polyphase_filter(h,m)
H = polyphase_filter(h,m)
Parameters
- h:
FIR filter coefficients (1d vector)
- m:
number of polyphase branches e.g. decimation ratio
- H:
resulting polyphase matrix form
FIR filter coefficients (1d vector)
number of polyphase branches e.g. decimation ratio
resulting polyphase matrix form
Description
Creation of the polyphase matrix. The filter is decomposed into m phases sub-filters (m rows of the H matrix). Each sub-filter can process a decimated version of the input signal, with a different phase.