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fl
Posts:
121
Registered:
10/8/05


Why is the number of decimation FIR filter states different with that of number of numerator?
Posted:
Apr 9, 2013 11:40 AM


Hi, I design a decimation low pass filter (decimation 16). It is an FIR, low pass 16 Hz, stop frequency is 50 Hz, sampling rate is 10000 Hz. I use filterbuidler design this filter. To my surprise, when I click the mfilt.firdecim variable, it shows:
FilterStructure: DirectForm FIR Polyphase Decimator Numerator: [1X582 double array] State: [576X1 double array] ...
How to explain the difference between Numerator and State?
Thanks,


Date

Subject

Author

4/9/13


fl

4/10/13


Navan


