How can we say that a signal is periodic or non periodic if its frequency domain plot is given?

The given signal may be periodic if its frequency spectrum having the fundamental time period repeats at regular intervals of time. The given signal is non periodic when the signal’s frequency is random and it is not defined as in sine wave or cosine wave.

How do you know if a signal is periodic or non periodic?

A periodic signal is one that repeats the sequence of values exactly after a fixed length of time, known as the period. In mathematical terms a signal x(t) is periodic if there is a number T such that for all t Equation 10.10 holds.

What is the frequency of a non periodic signal?

For a non periodic signal, in the first one second the frequency of a particular amplitude (value) may be of 4 Hz, and then in the next one second it may or may not be 4 Hz.

How does a frequency domain represent a signal?

When we represent a periodic signal using the magnitudes and phases in its Fourier series, we call that the frequency-domain representation of the signal. We often plot the magnitudes in the Fourier series using a stem graph, labeling the frequency axis by frequency.

Can random signals be periodic?

3 Answers. If you are talking about a given signal as “a deterministic realization of a phenomenon”, it can be periodic, but not really random. Naturally rotating bodies (stars, planets) also produce random periodic events (sunspots, daily temperatures).

What is non-periodic signal?

Non-periodic signals (also known as aperiodic signals), unlike periodic signals, do not have just one particular frequency. Instead, they are spread out over a continuous range of frequencies.

Which signal is non-periodic power or energy?

Difference between Energy and Power Signals

Power signal	Energy Signal
Practical periodic signals are power signals.	Non-periodic signals are energy signals.
Here, Normalized average power is finite and non-zero.	Here, total normalized energy is finite and non-zero.

What is the frequency of a signal?

Frequency is the rate at which current changes direction per second. It is measured in hertz (Hz), an international unit of measure where 1 hertz is equal to 1 cycle per second. Hertz (Hz) = One hertz is equal to one cycle per second.

Which of the following is periodic signal?

Periodic signals actually exist according to a definition. Explanation: Periodic signals are defined as signals having time period in between t=-∞ and t=+ ∞. These signals have an infinite time period that is periodic signals are continued forever.

Is the frequency domain plot of a signal periodic or nonperiodic?

A signal is periodic if its frequency domain plot is discrete; a signal is nonperiodic if its frequency domain plot is continuous. . Is the frequency domain plot of a voice signal discrete or continuous?

What is a non-periodic signal?

Signals which are non-periodic cannot be represented by a finite number of periodic signals. This is where we hear of the terms ‘frequency band’ and ‘bandwidth’. This means that the particular signal is made up of infinitely many sinusoidal waves within a particular range of frequencies called the ‘frequency band’.

What is the frequency of a nonperiodic composite signal?

The signal is periodic, so the frequency domain is made of discrete frequencies. as shown in Figure 3.3. A nonperiodic composite signal contains frequencies from 10 to 30 KHz. The peak amplitude is 10 V for the lowest and the highest signals and is 30 V for the 20-KHz signal.

What is the relationship between frequency and wave length in optoptical signals?

Optical signals have very high frequencies. A high frequency means a short wave length because the wave length is inversely proportional to the frequency (λ = v/f), where v is the propagation speed in the media. Can we say whether a signal is periodic or nonperiodic by just looking at its frequency domain plot?