engineering recuitment GATE ECE 2023-24 Test Series Communication Systems Probability and Random Variable Random Variables
If the variance \(\sigma _d^2\) of d(n) = [x(n) - x(n + 1)] is one-fifth the variance of a stationary zero-mean discrete time signal x(n). If the variance of x(n) is 4. Then the value of auto correlation function RXX(K) at K = 1 is ______.
1
7.2
2
4
3
3.6
4
8