I hope to show that aliasing occurs for more than one sinusoid

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Changhyun Kim 2022-3-31

评论： Les Beckham 2022-3-31

I want to show that aliasing occurs for more than one sinusoid, such as sample like this

x(t) = 3*cos(2*pi*300*t+pi/3) + 8*cos(2*pi*800*t-pi/5) at fs=500Hz

% fs means sample frequency

truly thnx for kindness

Les Beckham 2022-3-31

Perhaps you are looking for something like this?

t = 0:1/500:0.02;

x = 3*cos(2*pi*300*t+pi/3) + 8*cos(2*pi*800*t-pi/5);

plot(t,x)

t = 0:1/50000:0.02;

x = 3*cos(2*pi*300*t+pi/3) + 8*cos(2*pi*800*t-pi/5);

hold on

plot(t,x)

legend('sampled at 500 Hz - aliasing', 'sampled at 50 KHz')

title 'Sum of two sinusoids at 300 and 800 Hz'

grid on

Changhyun Kim 2022-3-31

thxthx, i appreciate ur help

Les Beckham 2022-3-31

You are welcome.

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