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# EE6403 Important Questions Discrete Time Systems and Signal Processing

EE6403 Important Questions Discrete Time Systems and Signal Processing Regulation 2013 Anna University free download.

## Sample EE6403 Important Questions:

1. Define Signal.

A Signal is defined as any physical quantity that varies with time, space or any other independent variables.

2. Define a system.

A System is a physical device (i.e., hardware) or algorithm (i.e., software) that performs an operation on the signal.

3. What are the steps involved in digital signal processing?

Converting the analog signal to digital signal, this is performed by A/D converter Processing Digital signal by digital system.
Converting the digital signal to analog signal, this is performed by D/A converter.

4. Give some applications of DSP?

Speech processing – Speech compression & decompression for voice
storage system
Communication – Elimination of noise by filtering and echo cancellation.
Bio-Medical – Spectrum analysis of ECG,EEG etc.

5. Write the classifications of DT Signals.

Energy & Power signals
Periodic & Aperiodic signals
Even & Odd signals.

6. What is an Energy and Power signal?

Energy signal: A finite energy signal is periodic sequence, which has a finite energy but zero average power.Power signal: An Infinite energy signal with finite average power is called a power signal.

7. What is Discrete Time Systems?

The function of discrete time systems is to process a given input sequence to generate output sequence. In practical discrete time systems, all signals are digital signals, and operations on such signals also lead to digital signals. Such discrete time systems are called digital filter.

8. Write the Various classifications of Discrete-Time systems.

Linear & Non linear system
Causal & Non Causal system
Stable & Un stable system
Static & Dynamic systems

9. Define Linear system

A system is said to be linear system if it satisfies Super position principle. Let us consider x1(n) & x2(n) be the two input sequences & y1(n) & y2(n) are the responses respectively, T[ax1(n) + bx2(n)] = a y1(n) + by2(n)

10. Define Static & Dynamic systems

When the output of the system depends only upon the present input sample, then it is called static system, otherwise if the system depends past values of input then it is called dynamic system.

 Subject Name Discrete Time Systems and Signal Processing Subject Code EE6403 Regulation 2013