If the variance $$\sigma _x^2$$ of d(n) = x(n) - x(n - 1) is one-tenth the variance $$\sigma _x^2$$ of a stationary zero-mean discrete-time signal x(n), then the normalized autocorrelation function $$\frac{{{R_{xx}}\left( K \right)}}{{\sigma _x^2}}$$ at K = 1 is
A. 0.95
B. 0.90
C. 0.10
D. 0.05
Answer: Option A
This Question Belongs to Electronics And Communications Engineering >> Communication Systems
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