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A digital signal with values of -3V and +3V is fed into an amplitude modulator to generate an amplitude shift keying (ASK) waveform. The digital signal, d(t), is shown in fig. 2.

A digital signal with values of -3V and +3V is fed into an amplitude modulator to generate an amplitude shift keying (ASK) waveform. The digital signal, d(t), is shown in fig. 2.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A digital signal with values of -3V and +3V is fed into an amplitude modulator to generate an amplitude shift keying (ASK) waveform. The digital signal, d(t), is shown in fig. 2.
Transcribed Image Text:A digital signal with values of -3V and +3V is fed into an amplitude modulator to generate an amplitude shift keying (ASK) waveform. The digital signal, d(t), is shown in fig. 2.
d(t) 3 + 4 Time, ms -3 Figure 2 If the DC offset voltage of the amplitude modulator is 5V and the carrier frequency is 2kHz, draw accurately the ASK waveform at the output of the amplitude modulator. b) Calculate the probability of a bit error for a phase shift keying (PSK) signal in the presence of additive white Gaussian noise if the signal-to-noise ratio is 5dB. c) A binary channel is shown in fig. 3 P(Y = 0|X = 0) = 1 P(X = 0) = 0.6 Y P(Y = 0|X = 1) = 0.1 P(X = 1) = 0.4 10 1 P(Y = 1|X = 1) = 0.9 Figure 3 %3D 3.
Transcribed Image Text:d(t) 3 + 4 Time, ms -3 Figure 2 If the DC offset voltage of the amplitude modulator is 5V and the carrier frequency is 2kHz, draw accurately the ASK waveform at the output of the amplitude modulator. b) Calculate the probability of a bit error for a phase shift keying (PSK) signal in the presence of additive white Gaussian noise if the signal-to-noise ratio is 5dB. c) A binary channel is shown in fig. 3 P(Y = 0|X = 0) = 1 P(X = 0) = 0.6 Y P(Y = 0|X = 1) = 0.1 P(X = 1) = 0.4 10 1 P(Y = 1|X = 1) = 0.9 Figure 3 %3D 3.
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