1
GATE ECE 2022
Numerical
+1
-0.33

A symbol stream contains alternate QPSK and 16-QAM symbols. If symbols from this stream are transmitted at the rate of 1 mega-symbols per second, the raw (uncoded) data rate is _________ mega-bits per second (rounded off to one decimal place).

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2
GATE ECE 2022
MCQ (Single Correct Answer)
+1
-0.33

Consider an FM broadcast that employs the pre-emphasis filter with frequency response

$${H_{pe}}(\omega ) = 1 + {{j\omega } \over {{\omega _0}}}$$,

where $$\omega$$0 = 104 rad/sec.

For the network shown in the figure to act as a corresponding de-emphasis filter, the appropriate pairs of (R, C) values is/are ____________.

GATE ECE 2022 Communications - Analog Communication Systems Question 1 English

A
R = 1 k$$\Omega$$, C = 0.1 $$\mu$$F
B
R = 2 k$$\Omega$$, C = 1 $$\mu$$F
C
R = 1 k$$\Omega$$, C = 2 $$\mu$$F
D
R = 2 k$$\Omega$$, C = 0.5 $$\mu$$F
3
GATE ECE 2022
Numerical
+1
-0.33

The transition diagram of a discrete memoryless channel with three input symbols and three output symbols is shown in the figure. The transition probabilities are as marked. The parameter $$\alpha$$ lies in the interval [0.25, 1]. The value of .. for which the capacity of this channel is maximized, is __________ (rounded off to two decimal places).

GATE ECE 2022 Communications - Fundamentals of Information Theory Question 2 English

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4
GATE ECE 2022
Numerical
+1
-0.33

Consider communication over a memoryless binary symmetric channel using a (7, 4) Hamming code. Each transmitted bit is received correctly with probability (1 $$-$$ $$\in$$), and flipped with probability $$\in$$. For each codeword transmission, the receiver performs minimum Hamming distance decoding, and correctly decodes the message bits if and only if the channel introduces at most one bit error. For $$\in$$ = 0.1, the probability that a transmitted codeword is decoded correctly is __________ (rounded off to two decimal places).

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