Howtosignalprocessing
- What is a continuous-time signal?
- What is the possible range of frequency spectrum for continuous-time signal?
- How do you calculate the spectrum of a signal?
- What are the different types of continuous-time signals?
What is a continuous-time signal?
A continuous-time (CT) signal is a function, s(t), that is defined for all time t contained in some interval on the real line. For historical reasons, CT signals are often called analog signals.
What is the possible range of frequency spectrum for continuous-time signal?
In a practical AM system, the audio signal has spectrum ranging from 0 khz to +5 khz.
How do you calculate the spectrum of a signal?
Frequency spectrum of a signal is the range of frequencies contained by a signal. For example, a square wave is shown in Fig. 3.5A. It can be represented by a series of sine waves, S(t) = 4A/π sin(2πft) + 4A/3π sin(2π(3f)t) + 4A/5π sin(2π(5f)t + …)
What are the different types of continuous-time signals?
Other examples of continuous signals are sine wave, cosine wave, triangular wave etc. The signal is defined over a domain, which may or may not be finite, and there is a functional mapping from the domain to the value of the signal.
