Sampling and Reconstructing Signals In Matlab -

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i have continuous signal : 

x(t) = cos(100*pi*t)+cos(200*pi*t)+sin(500*pi*t)

i must apply standard reconstruction of sampling theorem f=500hz

then have repeat it, f1>f

any guys? i'm confused signals , matlab!!

sampling @ f=500hz means taking samples every t = 1/f = 1/500 = 2ms.

i don't know units of t vector , length not specified.

let's assume length 1 second , units in us.

you can create sampling vector tsample every 2ms (which corresponds f=500hz) , value of signal @ points.

freq = 500; period = 1/freq * 1000000;       % convert tsample = 0:period:1000000;     % samples 0 1 second every 2000us sampled_signal = x(tsample);

pd: school exercise have see happens if don't satisfy nyquist criteria. try different sampling frequencies , see happens if don't sample fast enough.


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