GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 840 - 843 of 1076

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Question 840

Fourier Series and Fourier Transform Representations

Appeared in Year: 2017

Question

Numeric Answer▾

The transfer function of a causal LTI system is . If the input to the system is ; where u (t) is a unit step function. The system output as is …

Question 841

Entropy, Mutual Information and Channel Capacity Theorem

Appeared in Year: 2017

Question

MCQ▾

Which one of the following graphs shows the Shannon capacity (channel capacity) in bits of a memory-less binary symmetric channel with crossover probability ?

Choices

Choice (4)Response

a.

Bits of a Memory-Less Binary Symmetric

b.

One of the Following Graphs

c.

Memory-Less Binary Symmetric Channel

d.

The Shannon Capacity

Question 842

Appeared in Year: 2016

Question

MCQ▾

An analogue pulse is transmitted over an additive white Gaussian noise channel. The received signal is where is additive white Gaussian noise with power spectral density . The received signal is passed through a filter with impulse response Let and denote the energies of the pulse and the filter respectively. When the signal-to-noise ratio (SNR) is maximized at the output of the filter , which of the following holds?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 843

Amplitude Modulation and Demodulation

Appeared in Year: 2019

Question

Numeric Answer▾

The baseband signal m (t) shown in the figure is phase-modulated to generate the PM signal (Carry One Mark Each)

Phase-Modulated to Generate

The time t on the x-axis in the figure is in milliseconds. If the carrier frequency is and the ratio of the minimum instantaneous frequency (in kHz) to the maximum instantaneous frequency (in kHz) is … (rounded off to 2 decimal places) .

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