how do i generate a double tone sinusoidal signal

1. Generate a triple tone sinusoidal signal whose frequencies are 0.1, 2, 7 kHz and a sampling frequency of 20 kHz and a duration of 0.1 seconds. 2. Apply a LPF whose coefficients are given by

[1.0000 0.7303 0.5334 0.3895 0.2845 0.2077 0.1517 0.1108 0.0809 0.0591 0.0432 0.0315 0.023 0.0168 0.0123 0.009 0.0065 0.0048 0.0035 0.0026 0.0019 0.0014 0.001 0.0007] to the signal in step “1”.

Find and sketch the output of the filter y(t).

Answer 1

[Walter Roberson]

Fs = randi([50 44100]);
t = 0:1/Fs:0.1;
F = randi([1 floor(Fs/2)], 1, 2);
y = sin(t*pi*F(1)) + sin(t*pi*F(2));
plot(t, y);