15-07-2014, 03:00 PM
SARASWATHI VELU COLLEGE OF ENGINEERING --- SHOLINGHUR 2MarkQuestions andAnswers)
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1. Define DSP.
DSP - Digital Signal Processing.
It is defined as changing or analyzing information which is measured as discrete
time sequences.
2.List out the basic elements of DSP.
*signalin
*Analog toDigital converter
*Digital Signal processor
*DigitaltoAnalog converter
*signal out
3. Mention the advantages of DSP.
*Veracity
* Simplicity
*Repeatability
4. Give the applications of DSP.
*Telecommunication –spread spectrum, data communication
Biomedical – ECG analysis, Scanners.
* Speech/audio – speech recognition
* Military – SONAR, RADAR
5. Define Signal.
Signal is a physical quantity that varies with respect to time , space or any
other independent variable.
(Or)
It is a mathematical representation of the system
Eg y(t) = t. and x(t)= sin t.
6. Define system.
A set of components that are connected together to perform the particular
task. E.g.; Filters
7. What are the major classifications of the
signal? (i) Discrete time signal
(ii) Continuous time signal
8. Define discrete time signals and classify them.
Discrete time signals are defined only at discrete times, and for these
signals, the independent variable takes on only a discrete set of values.
Classification of discrete time signal:
1. Periodic and A periodic signal
2. Even and Odd signal
9. Define continuous time signals and classify them.
Continuous time signals are defined for a continuous of values of the
Independent variable. In the case of continuous time signals the independent
Variable is continuous. For example:
(i) A speech signal as a function of time
(ii) Atmospheric pressure as a function of altitude
Classification of continuous time
signal: (i) Periodic and A
periodic signal (ii) Even and
Odd signal
10. Define discrete time unitstep &unit impulse.
Discrete time Unit impulse is
defined as δ[n]= {1, n=0; }
{ 0,
otherwise.}
Unit impulse is also known as unit4
sample. Discrete time unitstep signal is
defined by
U[n]={0,n=0
}
{1,n>= 0
}
11. Define even and odd signal.
A discrete time signal is said to be even
when, x[-n]=x[n].
The continuous time signal is said to be even
when, x(-t)= x(t)
For example, Cosine wave is an even signal. The discrete time signal is said to be
odd when
x[-n]= -x[n]
The continuous time signal is said to be odd
when x(-t)= -x(t)
Odd signals are also known as nonsymmetrical signal. Sine wave signal is an odd
signal.
12. Define Energy and power signal.
A signal is said to be energy signal if it have finite energy and zero
power. A
signal is said to be power signal if it have infinite energy and finite power. If the