# Communications [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 88 - 93 of 106

Access detailed explanations (illustrated with images and videos) to 1176 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

## Question 88

Communications
Spectra of AM and FM

Appeared in Year: 2016

### Question

The amplitude of a sinusoidal carrier is modulated by a single sinusoid to obtain the amplitude modulated signal The value of the modulation index is …

## Question 89

Communications
Autocorrelation and Power Spectral Density

Appeared in Year: 2016

### Question

Two random variables X and Y are distributed according to

The probability

## Question 90

Communications
Amplitude, Phase and Frequency Shift Keying (ASK, PSK, FSK)

Appeared in Year: 2015

### Question

MCQ▾

The modulation scheme commonly used for transmission from GSM mobile terminal is

### Choices

Choice (4)Response

a.

b.

Gaussian Minimum Shift Keying

c.

d.

## Question 91

Communications
Circuits for Analog Communications

Appeared in Year: 2016

### Question

Consider the signal , where t is in seconds. The Nyquist sampling rate (in samples/second) for the signal is

## Question 92

Communications
Entropy, Mutual Information and Channel Capacity Theorem

### Question

The input X to the Binary Symmetric Channel (BSC) shown in the figure is ‘1’ with probability 0.8. The cross-over probability is . If the received bit Y = 0, the conditional probability that ‘1’ was transmitted is …

## Question 93

Communications
Edit

Appeared in Year: 2021

### Question

Consider a super heterodyne receiver tuned to 600 kHz. If the local oscillator feeds a 1000 kHz signal to the mixer, the image frequency (in integer) is ________ kHz.

Developed by: