- added

git-svn-id: http://moon:8086/svn/matlab/trunk@153 801c6759-fa7c-4059-a304-17956f83a07c
2021-03-22 20:28:22 +00:00
parent 1b5742e13e
commit b31f3e7435
140 changed files with 6054 additions and 0 deletions
@@ -0,0 +1,30 @@
+function [y, gain] = cic_filter(R, M, N, x)
+% [y, gain] = cic_filter(R, M, N, x)
+
+a_i = [1 -1];
+b_i = 1;
+
+a_c = 1;
+b_c = [1 zeros(1, M-1) -1];
+
+gain = (M*R)^N
+k_i = 1/(M*R);
+
+i_out = x;
+
+% Integrator
+for i=1:N,
+    i_out = k_i*filter(b_i, a_i, i_out);
+end;
+
+% Decimate
+c_out = i_out(R:R:length(i_out));
+
+% Comb
+for i=1:N,
+    c_out = filter(b_c, a_c, c_out);
+end;
+
+
+y = c_out;
+