GATE ECE 1988 | GATE ECE Year Wise Previous Years Questions

GATE ECE 1988

MCQ (Single Correct Answer)

-0.6

The message bit sequence input to a DPSK modulator is 1, 1, 0, 0, 1, 1. The carrier phase during the reception of the first two message bits is $$\pi ,\,\,\pi $$. The carrier phase for the remaining four message bits is

$$\pi $$, $$\pi $$, 0, $$\pi $$

0, 0, $$\pi $$, $$\pi $$

0, $$\pi $$, $$\pi $$, $$\pi $$

$$\pi $$, $$\pi $$, 0, 0

GATE ECE 1988

MCQ (Single Correct Answer)

-0.6

The transfer function of a zero - order hold is

$${{1 - \exp \left( { - Ts} \right)} \over s}$$

$$1$$

$${1 \over {\left[ {1 - \exp \left( { - Ts} \right)} \right]}}$$

GATE ECE 1988

MCQ (Single Correct Answer)

-0.6

A signal having uniformly distributed amplitude in the interval ( -V, +V ) is to be encoded using PCM with uniform quantization. The signal - to - quantizing noise ratio is determined by the

dynamic range of the signal

sampling rate

number of quantizing levels

power spectrum of signal

GATE ECE 1988

MCQ (Single Correct Answer)

-0.6

In a digital communication system, transmissions of successive bits through a noisy channel are assumed to be independent events with error probability p. The probability of at most one error in the transmission of an 8 - bit sequence is

$$7\left( {1 - p} \right)/8 + p/8$$

$${\left( {1 - p} \right)^8} + 8p{\left( {1 - p} \right)^7}$$

$${\left( {1 - p} \right)^8} + {\left( {1 - p} \right)^7}$$

$${\left( {1 - p} \right)^8} + p{\left( {1 - p} \right)^7}$$

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