GATE ECE 2017 Paper 1 — page 8

Questions 22–24 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 8 of 22

Which one of the following statements about differential pulse code modulation (DPCM) is true?

Your answerChoose one option.

The sum of message signal sample with its prediction is quantized

The message signal sample is directly quantized, and its prediction is not used

The difference of message signal sample and a random signal is quantized

The difference of message signal sample with its prediction is quantized

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In a digital communication system, the overall pulse shape

at the receiver before the sampler has the Fourier transform

. If the symbols are transmitted at the rate of 2000 symbols per second, for which of the following cases is the inter symbol interference zero?

Your answerChoose one option.

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The voltage of an electromagnetic wave propagating in a coaxial cable with uniform characteristic impedance is

Volts, where

is the distance along the length of the cable in metres,

is the complex propagation constant, and

is the angular frequency. The absolute value of the attenuation in the cable in dB/metre is ________.

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2017 · Paper 1