1) The input to a binary communication system x takes either o or 1 with probabilities 0.75 & 0.25 respectively. Due to errors caused by the noise, the output differs from the input x occasionally. The behavior of the communication system is modeled by the conditional probabilities P(y = 1|x = 1) and P(y = 0[x = 0)= 7/8. Find a) P(y = 1) and P(y = 0), b) P(x = 1|y = 1).

Introductory Circuit Analysis (13th Edition)
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1)
2)
3)
The input to a binary communication system x takes either o or 1 with
probabilities 0.75 & 0.25 respectively. Due to errors caused by the noise, the output differs from
the input x occasionally. The behavior of the communication system is modeled by the
conditional probabilities P(y = 1|x = 1) and P(y = 0[x = 0)= 7/8. Find
a) P(y = 1) and P(y = 0),
b) P(x = 1y = 1).
A random variable X has the cumulative density function (CDF)
x ≤ 0
0≤x≤ 10.
x > 10
0,
Fx(x) = kx²,
100k,
a) Find the value of k.
b) Is this random variable discrete, continuous or mixed?
c) Find the values of P(X ≤ 5)
d) Find the value of P(5 ≤X ≤7)
e) Plot the corresponding probability density function (PDF).
X is a N (0,0²) random variable. This random variable is passed through a
system whose input-output relation is given by y = g(x). Find the PDF or the probability mass
function (PMF) of the output random variable Y in each of the following cases:
a) Square law device, g(x) = ax²
b) Limiter,
c) Hard limiter,
g(x) =
g(x) =
=
-b,
b,
X,
a,
0,
x ≤-b
x ≥b.
x <b
x > 0
x = 0.
b, x < 0
Transcribed Image Text:1) 2) 3) The input to a binary communication system x takes either o or 1 with probabilities 0.75 & 0.25 respectively. Due to errors caused by the noise, the output differs from the input x occasionally. The behavior of the communication system is modeled by the conditional probabilities P(y = 1|x = 1) and P(y = 0[x = 0)= 7/8. Find a) P(y = 1) and P(y = 0), b) P(x = 1y = 1). A random variable X has the cumulative density function (CDF) x ≤ 0 0≤x≤ 10. x > 10 0, Fx(x) = kx², 100k, a) Find the value of k. b) Is this random variable discrete, continuous or mixed? c) Find the values of P(X ≤ 5) d) Find the value of P(5 ≤X ≤7) e) Plot the corresponding probability density function (PDF). X is a N (0,0²) random variable. This random variable is passed through a system whose input-output relation is given by y = g(x). Find the PDF or the probability mass function (PMF) of the output random variable Y in each of the following cases: a) Square law device, g(x) = ax² b) Limiter, c) Hard limiter, g(x) = g(x) = = -b, b, X, a, 0, x ≤-b x ≥b. x <b x > 0 x = 0. b, x < 0
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