2. Objectives
Signal and spectrum definitions
Analog vs Digital
Time Sampling
Quantization
Systems definition and properties
Real-Time Constrains
3. What is a signal?
Signal – a function that carry information in time and frequency
4. What is a spectrum?
The representation of a signal in frequency domain
5. Example
Example
We have a signal f(t) = 4*sin(10*t) + 3*sin(20*t) + sin(50*t) + 0.5*sin(70*t)
What is the representation of the signal in time domain?
What is the representation of the signal in frequency domain?
11. Nyquist-Shannon Theorem
Let it be a signal with limited bandwidth (B), i.e. there is no frequency higher than B Hz in that
analog signal.
Thus, the sampling frequency must be greater or equal then B
Fs > 2B