Correct Answer - Option 3 : Analytical representation
Discrete-time signals are often obtained by sampling continuous-time signals.
There are three ways to represent discrete time signals.
1) Functional Representation.
Example:
\(x\left[ n \right] = \left\{ {\begin{array}{*{20}{c}} {n\;\;for\;\;0 \le n \le 10}\\ {0\;\;\;\;\;\;\;otherwise} \end{array}} \right.\)
2) Tabular method of representation
Example:
| n |
-3 -2 -1 0 1 2 3 4 |
| x(n) |
0 0 1 1 1 1 0 1 |
3) Sequence Representation
Example:
\(x\left[ n \right] = \left\{ {\begin{array}{*{20}{c}} {1,}&{5,}&{ - 2,}&3\\ {}& \uparrow &{}&{} \end{array}} \right\}\)
