2024-10-17 17:29:11 +08:00
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%%%verification of polyphase structures using trig
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2024-10-08 11:23:42 +08:00
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clc;clear all;close all
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fs = 1e8;
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t = (0:1:1e2)'/fs;
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% f = 20e6;
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% s = sin(2*pi*f*t);
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s = triang(1e2-1);
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s = [zeros(1,10) s' zeros(1,10)]';
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N = length(s);
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ts = (0:1:N-1)'/fs;
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%%%
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s_r1 = [0 s(1:end-1,1)']';
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[s2,s2_mean] = MeanIntp(s,s_r1);
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s_intp2 = zeros(2*N,1);
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s_intp2(1:2:2*N) = s2_mean;
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s_intp2(2:2:2*N) = s2;
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t_intp2 = (0:1:2*N-1)'/fs/2;
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%%%
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s2_r1 = [0 s2(1:end-1,1)']';
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[s4_4,s4_3] = MeanIntp(s2,s2_mean);
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[s4_2,s4_1] = MeanIntp(s2_mean,s2_r1);
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s_intp4 = zeros(4*N,1);
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s_intp4(1:4:4*N) = s4_1;
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s_intp4(2:4:4*N) = s4_2;
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s_intp4(3:4:4*N) = s4_3;
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s_intp4(4:4:4*N) = s4_4;
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t_intp4 = (0:1:4*N-1)'/fs/4;
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figure('Units','normalized','Position',[0.000390625,0.517361111111111,0.49921875,0.422916666666667]);
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plot(ts,s,t_intp2,s_intp2)
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grid on
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% xlim([0.58 0.62]*1e-6)
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%
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%
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figure('Units','normalized','Position',[0.500390625,0.517361111111111,0.49921875,0.422916666666667]);
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plot(t_intp4,s_intp4)
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grid on
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% xlim([0.58 0.62]*1e-6)
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