--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/m-toolbox/classes/@miir/mkbandpass.m	Wed Nov 23 19:22:13 2011 +0100
@@ -0,0 +1,34 @@
+% MKBANDPASS return a bandpass filter miir(). A Cheby filter is used.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DESCRIPTION: MKBANDPASS return a bandpass filter miir().
+%              A Cheby filter is used.
+%
+% CALL:        f = mkbandpass(f, pl)
+%
+% VERSION: $Id: mkbandpass.m,v 1.11 2011/04/04 11:37:02 hewitson Exp $
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+function f = mkbandpass(f, pl)
+  
+  g      = find(pl, 'gain');
+  fc     = find(pl, 'fc');
+  fs     = find(pl, 'fs');
+  order  = find(pl, 'order');
+  ripple = find(pl, 'ripple');
+  
+  utils.helper.checkFilterOptions(pl);
+  
+  % Build filter coefficients
+  [a, b] = cheby1(order, ripple, 2.*fc./fs);
+  
+  % Set filter properties
+  f.name    = 'bandpass';
+  f.fs      = fs;
+  f.a       = g.*a;
+  f.b       = b;
+  f.histin  = zeros(1,f.ntaps-1); % initialise input history
+  f.histout = zeros(1,f.ntaps-1); % initialise output history
+end
+