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Just wanted to know if you guys agree with my answers:

An analogue signal of 1 s duration is sampled at 512 equally spaced times and its DFT is computed.

a) what is the separation in rad/s between the successive frequency components?

My ans: 2pi/512

b)what is the highest frequency present in the spectrum?

My ans: not to sure about this, but i would say it the inverse of the duration of the signal (1 second) so it is 1 Hz...is this righ?

c)What is the hight frequency that can be allowed in the analogu signal if aliasing is to be prevented?

My ans: Nyquist sampling theorm must be obeyed to avoid aliasing. Therefore, ws > 2wb, where ws is my sampling frequency and wb is my bandwidth (or maximum frequency component).

fs = 1/Ts =512 therefore ws = 2*pi*512.

therefore the highest allowed freqeuncy is: wb < ws/2

wb < 2*pi*256. if my highest frequecy is exactly 2*pi*256 i will still get aliasing right?

thanks

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# Signals and systems - is this right?

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