jens
7bb287e303
git-svn-id: http://moon:8086/svn/vhdl/trunk@1495 cc03376c-175c-47c8-b038-4cd826a8556b
58 lines
1.4 KiB
Matlab
58 lines
1.4 KiB
Matlab
% Read data
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function tb_results()
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%fa = 100.0;
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fa = textread('fa.txt')/1E6
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R = textread('ratio.txt');
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N = textread('nstages.txt');;
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M = 1;
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fa_dec = fa/R
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N_pfir = 63;
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I_out_dec = textread('i_dec.txt')';
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Q_out_dec = textread('q_dec.txt')';
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I_out_fir = textread('i_fir.txt')';
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Q_out_fir = textread('q_fir.txt')';
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N_dec = length(I_out_dec)-2*N_pfir;
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N_fft_dec = N_dec
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N_fft2_dec = N_fft_dec/2;
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N_fir = length(I_out_fir)-2*N_pfir;
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N_fft_fir = N_fir
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N_fft2_fir = N_fft_fir/2;
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fft_y2_fir = 2/N_fft_fir*abs(fft(I_out_fir(2*N_pfir+1:N_fft_fir+2*N_pfir).*hann(N_fft_fir)'));
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fft_y2_dec = 2/N_fft_dec*abs(fft(I_out_dec(2*N_pfir+1:N_fft_dec+2*N_pfir).*hann(N_fft_dec)'));
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f = (1:N_fft_dec)/N_fft_dec;
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g = (R*M)^N;
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H = abs(sin(pi*M.*f)./sin(pi.*f/R)).^N;
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[v, j] = max(fft_y2_dec(1:N_fft2_dec/2))
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H = v*H/H(j);
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audiowrite('iq.wav', 0.5*[I_out_dec' Q_out_dec'], 16000, 'BitsPerSample', 16);
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audiowrite('iq_cfir.wav', 0.5*[I_out_fir' Q_out_fir'], 8000, 'BitsPerSample', 16);
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% Output
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close all;
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plot(1:length(I_out_dec), I_out_dec, 1:length(Q_out_dec), Q_out_dec); grid;
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figure;
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cic_plot(M, N, R);
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figure;
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subplot(2,1,1)
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plot(fa/(R*N_fft_dec)*(0:N_fft2_dec),20*log10(fft_y2_dec(1:N_fft2_dec+1)), '-', fa/(R*N_fft_dec)*(0:N_fft2_dec),20*log10(H(1:N_fft2_dec+1)), 'r-');
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legend('CIC', 'Droop');
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xlabel('MHz');
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grid;
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subplot(2,1,2)
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plot(fa/(2*R*N_fft_fir)*(0:N_fft2_fir),20*log10(fft_y2_fir(1:N_fft2_fir+1)), '-');
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legend('CFIR');
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xlabel('MHz');
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grid;
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