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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-10 section-2

Each section contains 100 MCQs on Digital Communication .
91
The probability of error of DPSK is . . . . . . . . than that of BPSK.
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Answer & Solution
Answer: Option A
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92
The peak-to-peak input to an 8-bit PCM coder is 2 Volts. The signal power-to-quantization noise power ratio (in dB) for an input of 0.5cos(ωmt) is
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Answer: Option B
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93
Consider the signal x(t) shown in the figure. Let h(t) denote the impulse response of the filter matched to x (t), with h(t) being non-zero only in the interval 0 to 4 sec. The slope of h(t) in the interval 3 < t < 4 sec is
Digital Communication mcq question image
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Answer: Option B
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94
The spectrum of BFSK may be viewed as the sum of
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Answer: Option A
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95
Consider an analog signal sampled at a rate of 2 KHz and quantized into 128 levels. The time duration for each bit of the binary encoded signal is:
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Answer: Option C
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96
Signal to noise ratio is highest in:
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Answer: Option B
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97
A 6 MHz channel is used by digital signaling system utilizing four-level signals. The maximum possible transmission rate is
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Answer: Option D
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98
A group of N stations shares a 56 kbps pure ALOHA channel. Each station outputs a 1000 bit frame on an average of once every 100 sec. What is the maximum value of N?
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Answer: Option A
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