Question

Classify the following signals as either casual or non-causal: a) x[n]=delta[n−2]

Answer 1

A signal is classified as causal if its value at any given point depends only on its present and past values. On the other hand, a non-causal signal is a signal that depends on future values as well. The signal x[n] = delta[n−2] can be classified as non-causal.

Step-by-step explanation:

A signal is classified as causal if its value at any given point depends only on its present and past values. On the other hand, a non-causal signal is a signal that depends on future values as well.

In this case, the signal x[n] = delta[n−2] can be classified as non-causal because its value at n=n depends on the future values of the signal (n > n). For example, if n=2, the value of x[n] is non-zero, even though the signal is defined at n=0.