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Analog Modulation in Communications - Electrical Engineering

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Analog Modulation in Communications - Electrical Engineering

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Questions and Answers

What is the result wave called after the modulation process?

Baseband signal

Modulated carrier

Modulating signal

Modulated signal (correct)

Which type of modulation involves changing a sinusoidal signal in amplitude, frequency, or phase proportional to a message signal?

Frequency Modulation (FM)

Pulse Width Modulation (PWM)

Pulse Amplitude Modulation (PAM)

Continuous Wave (CW) Modulation (correct)

What is the purpose of modulation for frequency location assignment?

To alter the bandwidth

To reduce noise and interference

To transmit a low frequency signal using a high frequency signal

To assign frequencies for different signals (correct)

Which type of modulation involves changing a periodic train of pulses in amplitude, position, or width proportional to a message signal?

Pulse Code Modulation (PCM) Signup and view all the answers

What is the purpose of modulation to increase efficiency of radiation?

To increase efficiency of radiation Signup and view all the answers

Why is modulation used to overcome equipment limitation?

To overcome equipment limitations Signup and view all the answers

What type of amplitude modulation is represented by Double-Sideband, Large Carrier (AM/DSB-LC)?

Normal AM with constant frequency and phase Signup and view all the answers

What does the modulation index (m) represent in amplitude modulation?

The ratio of the amplitude of the message to the amplitude of the carrier Signup and view all the answers

Which component of the amplitude modulated signal corresponds to the envelop of the carrier?

A(t) Signup and view all the answers

What is the role of 𝜔_c in amplitude modulation?

Frequency of the carrier signal Signup and view all the answers

What distinguishes Double-Sideband, suppressed Carrier (AM/DSB-SC) from Double-Sideband, Large Carrier (AM/DSB-LC)?

Presence of a suppressed carrier Signup and view all the answers