Mercurial > hg > ltpda

annotate m-toolbox/classes/@pz/ri2fq.m @ 31:a26669b59d7e database-connection-manager

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Update LTPDAworkbench
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % RI2FQ Convert comlpex pole/zero into frequency/Q pole/zero representation.
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 % DESCRIPTION: RI2FQ Convert comlpex pole/zero into frequency/Q pole/zero
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5 % representation.
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6 %
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7 % CALL: [f0, q]= ri2fq(c)
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8 %
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9 % VERSION: $Id: ri2fq.m,v 1.4 2011/02/18 16:48:54 ingo Exp $
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10 %
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11 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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12
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13 function [f0, q]= ri2fq(c)
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14
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15 if(nargin==0)
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16 disp('usage: [f0, q]= ri2fq(c)');
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17 return
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18 end
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19
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20 a = real(c(1));
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21 b = imag(c(1));
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22
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23 f0 = sqrt(a^2 + b^2)/(2*pi);
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24 q = 0.5*sqrt(1 + b^2/a^2);
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25
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26 end