How to get dsp.CICDecimator section word lengths?

mfilt.cicdecim is now deprecated in favor of dsp.CICDecimator. However, I can't find how to get dsp.CICDecimator to give me the word length of every sections of the CIC. For example:

hd = mfilt.cicdecim(20, 1, 2, 16, 16, 15);
wordLengths = hd.SectionWordLengths; % [24 20 19 18]
fracLengths = hd.SectionFracLengths; % [14 10 9 8]
outputFracLength = hd.OutputFracLength; % 6

How would I get the same results using dsp.CICDecimator? I can do

hd = dsp.CICDecimator(20, 1, 2, 'OutputWordLength', 16);

but I can't figure out how to get minimum word/frac length for each section. I can't even seem to be able to give the input word/frac length!

[Meng Zhao]

I have run into this problem, too. Any answers?

Answer 1

[Edson Silva]

The following code will do the job:

CIC1 = dsp.CICDecimator(8,1,3);
CIC1.SectionWordLengths=[32 32 32 32];
CIC1.FixedPointDataType='Specify word lengths'

letting the last line without the comma will show you the following:

CIC1 =

dsp.CICDecimator with properties:

DecimationFactor: 8

DifferentialDelay: 1

NumSections: 3

FixedPointDataType: 'Specify word lengths'

SectionWordLengths: [32 32 32 32]

OutputWordLength: 32