## Signals Systems Past Papers 1

Paper: Signals Systems

Time Allowed:3 hours

Examination:

Total Marks:70, Passing Marks (35)

**Q 1:** What are the Basic System Properties? Explain.

** **

**Q 2:** Convolve the following signals

** **

** **h(t) = e^{-at} u(t) where a > 0

x(t) = e^{-bt}u(t) where b> 0

**Q 3:** Explain in detail Pulse Amplitude modulation and Sinusoidal Frequency Modulation with the help of

Examples.

**Q 4:** Explain properties of Laplace transform.

**Q 5: **Explain sampling theorem. How signal can be reconstructed from samples using interpolation.

**Q 6:** Explain Linearity, time shifting, time reversal and time scaling properties of continues time Fourier

series.

**Q 7: **Explain properties of LTI system in detail.

**Q 8:** Write short notes on any two of the following.

- Periodic and Aperiodic Signals
- Aliasing of the signal.
- Frequency Division Multiplexing

## Signals Systems Important Questions from Guess Papers 2

Paper: Signals Systems

Time Allowed:3 hours

Examination:

Total Marks:70, Passing Marks (35)

Q.1 True/False. (14)

a. Communication is the process of exchanging information.

b. Optical media communication channels are used for audio or video analog signals.

.

c. Simplex communication refers to a one-way transmission type system.

d. Modulation makes the information signal more compatible with the medium.

e. Analog signals vary continuously.

f. A complex Exponential Signal is Three Dimensional Signal.

g. A system that require memory is called dynamic system.

Q.2 Derive the Equation for Energy & power in Signal and System? . (14)

Q.3 X(t) = Cost + Sint + CostSint ?. (7+7)

Find Even & Odd Component Of Signal ?

Q.4

Find i) x(t-1)

ii) x(2t+1)

iii) x(4-t/2)

iv) x(t+1)

.Q.5 What is signal & System. Explain. (14)

Q.6 Find the cofficient of Fourier Series? (14)

Q.7 Find Discrete Time Fourier Trasnform? (14)

X[n] = a^{n} u[n]

Q.8 Write short notes on any two of the following (7+7)

(a) Fourier Series

(b) Continous and Discrete-time signal

(c) Unit Step & Unit Impulse