Signals and Systems

1.10 DISCRETE TIME SYSTEMS

The classifications of discrete time signals have been introduced. Let us introduce discrete time systems. A device or an algorithm which performs some particular operations on the discrete time signal is known as a discrete time system. Figure 1.24 shows the input and output of a discrete time system.

 

 

Fig. 1.24 A discrete time system

 

In Fig. 1.24, y(n) is the response for the excitation x(n). The input-output relationship for discrete time system is given by

 

y(n) = T[x(n)]     (1.61)

 

 

where T represents ...