The ideal delay system is defined by the equation
whtere nd is a fixed positive integer called the delay of the system. In words, the ideal delay
system simply shifts the input sequence to the right by nd samples to form the output. If in
Eq.(2.22) nd is a fixed negative integer, then the system would shift the input to the left by nd
samples corresponding to a time acvance.
Example 2. 2 Moving Average
The general moving average system is defined by the equation