4e4f6560_imator___MATLAB_mfilt_firdecim__Description
[Name] FilterStructure [Values] String [Description] 
Reports the type of filter object. You cannot set this property — it is always read only and results from your choice of mfilt object. Describes the signal flow for the filter object.
Direct-form FIR polyphase decimator - MATLAB mfilt.firdecim