update lab 2 (7ddd615a) · Commits · 袁通 / EE205 Signal And System LAB

LAB2/P2_4_d.m

+1 −1

Original line number	Diff line number	Diff line
		@@ -13,7 +13,7 @@ y2 = conv(x1, conv(h1, h2));
		ny = nh1(1)+nx1(1):1:nh1(end)+nh1(end)+nx1(end)

		subplot(2,1,1), stem(ny, y1), title("y_2[n]=(x_1[n]h_1[n])h_2[n]");
		subplot(2,1,2), stem(ny, y2), title("y_1[n]=x_1[n]*(h_1[n]+h_2[n])");
		subplot(2,1,2), stem(ny, y2), title("y_1[n]=x_1[n](h_1[n]h_2[n])");

		saveas(gcf, "plots/P2_4_d_out.png");
		close;

+8 −7

Original line number	Diff line number	Diff line
		% Problem 2.4(e)

		% TODO Check it!!!!
		x1 = [1 1 1 1 0 0 0 0 0 0];
		nx1 = 0:1:9;

		@@ -21,18 +21,19 @@ ye2_inter = conv(he2, x1)

		subplot(3,1,1);
		hold on
		stem(nye1, ye1);
		stem(nye1, ye1_inter);
		stem(nye1, ye1, 'm--s');
		stem(nye1, ye1_inter, 'r--p');
		legend('y_{e1}[n] = x_1[n]h_{e1}[n]', 'y_{e1}[n] = x_1[n]h_{e1}[n]', 'Location', 'northeast');

		subplot(3,1,2);
		hold on
		stem(nye2, ye2);
		stem(nye2, ye2_inter);
		stem(nye2, ye2, 'm--s');
		stem(nye2, ye2_inter, 'r--p');

		subplot(3,1,3);
		hold on
		stem(nye1, ye1);
		stem(nye2, ye2);
		stem(nye1, ye1, 'm--s');
		stem(nye2, ye2, 'r--p');

		saveas(gcf, "plots/P2_4_e_out.png");
		close;

+11 −7

Original line number	Diff line number	Diff line
		% Problem 2.4(f)

		x1 = [1 1 1 1 0 0 0 0 0 0];
		nx1 = 0:1:9;
		nx1 = 0:9;

		h1 = [1 -1 3 0 1];
		h2 = [0 2 5 4 -1];
		nh1 = 0:1:4;
		nh1 = 0:4;

		w = x1.*(nx1+1);
		hw = nx1;
		@@ -23,13 +23,17 @@ hseries = conv(hf1, hf2);
		nhseries = (nhf1(1)+nhf2(1)):1:(nhf1(end)+nhf2(end));

		yf2 = conv(x1, hseries);
		nyf2 = (x1(1)+nhseries(1)):1:(x1(end)+nhseries(end));
		nyf2 = (nx1(1)+nhseries(1)):(nx1(end)+nhseries(end));

		figure;
		stem(nyf1, yf1);
		stem(nyf2, yf2);

		saveas(gcf, "P2_4_f_out.png");
		hold on
		stem(nyf1, yf1, 'm--s');
		stem(nyf2, yf2, 'r--p');
		title('y_{f1}[n] & y_{f2}[n]');
		legend('y_{f1}[n]', 'y_{f2}[n]', 'Location', 'northeast');
		xlabel('n');

		saveas(gcf, "plots/P2_4_f_out.png");
		close;

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+12.2 KiB

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+6 −2

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		@@ -30,8 +30,12 @@ hparallel = hg1 + hg2;
		yg2 = conv(xg, hparallel);
		nyg2 = nyg1;

		stem(nyg1, yg1);
		stem(nyg2, yg2);
		figure;
		hold on;
		stem(nyg1, yg1, 'm--s');
		stem(nyg2, yg2, 'r--p');
		title('y_{g1}[n] & y_{g2}[n]');
		legend('y_{g1}[n]', 'y_{g2}[n]', 'Location', 'northeast');

		saveas(gcf, "plots/P2_4_g_out.png");
		close;