DISCRETE TIME SIGNALS PART 2

Question 1

A ____________ is defined as an entity that acts on an input signal and transforms it into an _______________.

Answer 1

system, output signal

Question 2

A ________________________ is one which transforms discrete-time input signals into discrete-time output signals. For example microprocessors, semiconductor memories, shift registers, etc. are discrete time systems.

Answer 2

discrete-time system

Question 3

A discrete-time systems are can be classified as follows.

Static (memoryless) and dynamic (memory) systems
Causal and non-causal systems
Linear and non-linear systems
Time-invariant and time varying systems
Stable and unstable systems
Invertible and non-invertible systems
FIR and IIR systems

Question 3

The first property is concerned with whether or not a system has memory. A system is said to be memoryless or static if the output at any instant n depends only on the input applied at that instant n but not on the past or future values of input or past values of output.

Static and Dynamic System