jens
b31f3e7435
git-svn-id: http://moon:8086/svn/matlab/trunk@153 801c6759-fa7c-4059-a304-17956f83a07c
31 lines
408 B
Matlab
Executable File
31 lines
408 B
Matlab
Executable File
function [y, gain] = cic_filter(R, M, N, x)
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% [y, gain] = cic_filter(R, M, N, x)
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a_i = [1 -1];
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b_i = 1;
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a_c = 1;
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b_c = [1 zeros(1, M-1) -1];
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gain = (M*R)^N
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k_i = 1/(M*R);
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i_out = x;
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% Integrator
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for i=1:N,
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i_out = k_i*filter(b_i, a_i, i_out);
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end;
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% Decimate
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c_out = i_out(R:R:length(i_out));
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% Comb
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for i=1:N,
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c_out = filter(b_c, a_c, c_out);
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end;
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y = c_out;
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