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Digital Communication MCQ Questions & Answers | ECE

Learn Digital Communication MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Digital Communication MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-8 section-2

Each section contains 100 MCQs on Digital Communication .
71
One of the following bandpass digital modulation schemes is not suitable for transmission over nonlinear bandpass channels:
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Answer & Solution
Answer: Option B
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72
A signal of maximum frequency of 2 MHz modulated by 4 GHz carrier is DSB/SC. If the resultant signal is sampled ideally as low pass signal, the minimum sampling frequency should be
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Answer & Solution
Answer: Option B
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73
Consider a binary transmission system with the symbol waveforms s1(t) = Acos(ωct), s2(t) = -Acos(ωct). This modulation format is termed as
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Answer & Solution
Answer: Option C
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74
In PCM system, if quantization level is increased from 2 to 4, then the relative bandwidth required will . . . . . . . .
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Answer & Solution
Answer: Option C
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75
Source encoding in a data communication system is done in order to
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Answer & Solution
Answer: Option A
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76
The probability of error is minimum for
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Answer & Solution
Answer: Option A
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77
In FSK the carrier frequency is switched between . . . . . . . . extremes.
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Answer & Solution
Answer: Option C
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78
Bandwidth (BW) of 8PSK, 16PSK modulated signals are
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Answer & Solution
Answer: Option D
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79
The ramp signal m(t) = at is applied to a delta modulator with sampling period Ts and step size δ. Slope overload distortion would occur if
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Answer & Solution
Answer: Option C
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80
A speech signal occupying the bandwidth of 300 Hz to 3 kHz is converted into PCM format for use in digital communication. If the sampling frequency is 8 kHz and each sample quantized into 256 levels, then the output bit rate will be
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Answer & Solution
Answer: Option D
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