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annotate m-toolbox/classes/+utils/@math/mtxiirresp2.m @ 0:f0afece42f48

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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % MTXIIRRESP calculate iir resp by matrix product
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2 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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3 % A contains numerators coefficients (a row for each filter)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 % A contains denominators coefficients (a row for each filter)
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5 %
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6 % NOTE: A and B should have the same size, zero pad if necessary
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7 %
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8 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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9 function rsp = mtxiirresp2(A,B,freq,fs)
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10 T = 1/fs;
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11
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Daniele Nicolodi <nicolodi@science.unitn.it>
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12 % build Z matrix
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13 Z = ones(size(A,2),numel(freq));
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14 zz = exp(-2.*pi.*1i.*T.*freq);
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15 for jj=2:size(Z,1)
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16 Z(jj,:) = zz.^(jj-1);
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17 end
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18
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19 % get numerator and denominator
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20 num = A*Z;
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21 den = B*Z;
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22 % get response
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23 rspm = num./den;
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24 if size(A,1)>1
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25 rsp = sum(rspm,1);
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26 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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27 rsp = rspm;
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28 end
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29
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30
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31 end