Question

If the variance σx² of d(n) = x(n) - x(n - 1) is one-tenth the variance σx² of a stationary zero mean discrete time signal x(n), then the normalized autocorrelation function Rxx(x)/σx² at k = 1 is

a.

0.95

b.

0.90

c.

0.10

d.

0.05

Posted under Electronics and Communication Engineering

Answer: (c).0.10

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Q. If the variance σx² of d(n) = x(n) - x(n - 1) is one-tenth the variance σx² of a stationary zero mean discrete time signal x(n), then the normalized autocorrelation function...
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