신호처리 | 주파수 응답 |
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작성자 cemtool 작성일14-04-23 18:03 조회13,088회 댓글1건본문
임펄스 응답이 이다. 주파수 응답을 구하고 그려보자.
- ex7_3.cem
% Chapter 7: Example 7.3 Amplitude vs Magnitude response%h = [1,1,1]; w = [0:500]*pi/500; H = freqz(h,1,w); magH = abs(H); phaH = angle(H); ampH = ones(1,501)+2*cos(w); angH = -w; subplot(1,1,1) subplot(2,2,1); plot(w/pi,magH); title("Magnitude Response"); xlabel("frequency in pi units"); ylabel("|H|"); grid on; axis([0 1 -1.5 3.5]); %set(gca,'XTickMode','manual','XTick',[0;0.6667;1])%set(gca,'XTickLabelMode','manual','XTickLabels',[' 0 ';'2/3';' 1 '])%set(gca,'YTickMode','manual','YTick',[0]) subplot(2,2,3); plot(w/pi,phaH/pi); title("Piecewise Linear Phase Response"); xlabel("frequency in pi units"); ylabel("angle in pi units"); grid on; axis([0 1 -1 1])%set(gca,'XTickMode','manual','XTick',[0;0.6667;1])%set(gca,'XTickLabelMode','manual','XTickLabels',[' 0 ';'2/3';' 1 '])%set(gca,'YTickMode','manual','YTick',[-0.6667;0;0.3333])%set(gca,'YTickLabelMode','manual','YTickLabels',['-2/3';' 0';' 2/3']) subplot(2,2,2); plot(w/pi,ampH); title("Amplitude Response"); xlabel("frequency in pi units"); ylabel("Hr"); grid on; axis([0 1 -1.5 3.5])%set(gca,'XTickMode','manual','XTick',[0;0.6667;1])%set(gca,'XTickLabelMode','manual','XTickLabels',[' 0 ';'2/3';' 1 '])%set(gca,'YTickMode','manual','YTick',[0]) subplot(2,2,4); plot(w/pi,angH/pi); title("Linear Phase Response"); xlabel("frequency in pi units"); ylabel("angle in pi units"); grid on; axis([0 1 -1 1])%set(gca,'XTickMode','manual','XTick',[0;0.6667;1])%set(gca,'XTickLabelMode','manual','XTickLabels',[' 0 ';'2/3';' 1 '])%set(gca,'YTickMode','manual','YTick',[-0.6667;0])%set(gca,'YTickLabelMode','manual','YTickLabels',['-2/3';' 0'])
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