What is time invariant systems

Question

Explain what is meant by the term time invariant systems?

Answer 1

If the time delay or advance of the input signal leads to an identical shift in the output signal then system is known as time invariant system. This states that the time invariant system reacts identically and its reaction does not depend on the input signal. It also satisfies the below given condition:

R{x(n-k)}=y(n-k).