EC6303 Signals and Systems Important questions

EC6303 Signals and Systems Important questions Regulation 2013 Anna University free download. Signals and Systems EC6303 Important questions pdf free download.

Sample EC6303 Signals and Systems Important questions:

1 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.

2 Define system .

A set of components that are connected together to perform the particular task. (ec6303 signals and systems important questions)

3 What are the major classifications of the signal?

(i) Discrete time signal
(ii) Continuous time signal

4 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. (ec6303 signals and systems important questions)

Classification of discrete time signal:
i. Periodic and Aperiodic signal
ii. Even and Odd signal
iii. Causal Non Causal
iv. Energy and Power

5 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 (ec6303 signals and systems important questions)

Classification of continuous time signal:
i. Periodic and Aperiodic signal
ii. Even and Odd signal
iii. Causal Non Causal
iv. Energy and Power
v. Random and Deterministic Signals

6 Define discrete time unit step &unit impulse.

Discrete time Unit impulse is defined as
δ [n]= {0, n ≠ 0
{1, n=0 Unit impulse is also known as unit sample.
Discrete time unit step signal is defined by
U[n]={0,n=0
{1,n>= 0

7 Define continuous time unit step and unit impulse.

Continuous time unit impulse is defined as
δ (t)={1, t=0
{0, t ≠ 0

Continuous time Unit step signal is defined as
U(t)={0, t<0
{1, t ≥ 0 (ec6303 signals and systems important questions)