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rp2iir

PURPOSE ^

RP2IIR Return a,b coefficients for a real pole designed using the bilinear transform.

SYNOPSIS ^

function [a,b] = rp2iir(p, fs)

DESCRIPTION ^

 RP2IIR Return a,b coefficients for a real pole designed using the bilinear transform.

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 DESCRIPTION: RP2IIR Return a,b coefficients for a real pole designed using
              the bilinear transform.

 CALL:        filt = rpole(p, fs)

 INPUT:       p  - pole object
              fs - the sample rate for the filter

 VERSION:     $Id: rp2iir.m,v 1.2 2007/07/18 13:58:45 ingo Exp $

 HISTORY:     03-03-07 M Hewitson
                 Creation

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CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [a,b] = rp2iir(p, fs)
0002 % RP2IIR Return a,b coefficients for a real pole designed using the bilinear transform.
0003 %
0004 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0005 %
0006 % DESCRIPTION: RP2IIR Return a,b coefficients for a real pole designed using
0007 %              the bilinear transform.
0008 %
0009 % CALL:        filt = rpole(p, fs)
0010 %
0011 % INPUT:       p  - pole object
0012 %              fs - the sample rate for the filter
0013 %
0014 % VERSION:     $Id: rp2iir.m,v 1.2 2007/07/18 13:58:45 ingo Exp $
0015 %
0016 % HISTORY:     03-03-07 M Hewitson
0017 %                 Creation
0018 %
0019 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0020 
0021 f0 = get(p, 'f');
0022 w0 = f0*2*pi;
0023 a(1) = w0 / (2*fs + w0);
0024 a(2) = a(1);
0025 b(1) = 1;
0026 b(2) = (w0-2*fs) / (w0+2*fs);
0027 
0028 % END

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