Discussion1- Discuss the main advantages of the DSB-SC modulation technique overthe conventional AM modulation.2- Sketch the spectrum of the generated DSB-SC signal. Determine also thebandwidth of the output signal.3- Explain the operation of the ring modulator to generate DSB-SC signals.4- Sketch a block diagram for detecting the message signal from the DSB-SC signal and explain its operation briefly.5- Calculate the total transmitted power in the DSB-SC signal.6- A sinusoidal message signal with amplitude of 1 V and frequency of 2kHz is multiplied with a sinusoidal carrier with amplitude of 2 V andfrequency of 450 kHz. Determine the sideband frequencies of the outputsignal and sketch its spectrum. Find also the transmission bandwidth.

1. Advantages of DSB-SC over conventional AMAdvantages:Efficiency: DSB-SC (Double Sideband…

Answered: Discussion 1- Discuss the main…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A carrier signal is amplitude modulated by a sinewave. The resulting AM waveform is shown below. 3.5V- 1V- a) What is the amplitude of the carrier signal? b) c) To achieve 75 percent modulation, what amplitude of the modulating signal is needed? d) Calculate the effective voltage of the AM signal What is the modulation index?
• Discussion: 1. Define modulation. 2. Explain why modulation is necessary or desirable. 3. Define: a) The circuit that causes one signal to modulate another, and give the names of the two signals applied to this circuit. b) What is the name given to the new signals generated by the modulation process. 4. Are these statements true or false. Explain your answer a) The carrier frequency is usually lower than the modulating frequency. b) The carrier frequency remains constant during AM. c) The carrier of an AM signal contains information. 5. Explain why the modulation is linear in amplitude modulation system. 6. Explain the reason for making the modulation index (m) less than unity in DSB_LC modulation. 7. What percentage of the total power in an AM signal is in the carrier, one sideband, and both sidebands. 8. Write the trigonometric expression for a sine wave carrier signal.
For single sideband (SSB) modulation d) Explain with drawing the demodulation process of SSB signal.e) How many single sideband (SSB) stations can be accommodated in a 180 KHz bandwidth if the highest modulating signal frequency fmax is 9 KHz?f) What are the main advantages and disadvantages of single sideband (SSB) modulation compared with ordinary amplitude modulation (AM).
this question belongs to communication systems and networks.. if you could shift it to the right gentleman..thanks
For a frequency modulated system, the frequency deviation is 4 kHz and the maximum frequency of the baseband signal is 8.5 kHz. Estimate the modulation index.
Write a short note on quadrature amplitude modulation(QAM) and briefly identify its advantages over other modulation scheme/methods?
Please help with parts B4 and B5 of this practice question. Thank you
A sinusoidally modulated AM waveform is shown below: Determine: a) Peak amplitude of the upper and lower side frequencies. b) Peak amplitude of the unmodulated carrier. The modulation index. The carrier power and the power in the sidebands. The total transmitted power. 3 0 -3 -9 The transmission efficiency. The amplitude of the carrier which must be added or subtracted to attain a modulation index of 0.5. In AM modulation, the modulation index is kept < 100%, why?
Why is it desirable to have the modulation index of an AM signal as large as possible, without overmodulating?
For question 1, The instructor asked what is an approach to modulate a PWM signal and what is an approach to demodulate a signal. Thank you. Explain one approach for PWM modulation and detection (demodulation). Please draw the required circuits and diagrams.
The baseband signal modulates a 98 kHz carrier sine wave. Using frequency and amplitude labelling similar to that in Figure 2, sketch the spectrum of the modulated signal using a template, similar to that in Figure 3, for the following modulations: AM with the amplitude of the carrier wave being 20 V DSBSC SSB – the lower sideband SSB – the upper sideband
1. The Voltage spectrum of FM signal is shown in Figure 1. The maximum amplitude of modulating signal is 5V. Calculate the bandwidth , modulation index ,Carrier frequency, modulating frequency and specify the type of Modulator(narrow band or wide band). 1.54 4.06 4.06 2.45 2.45 0.91 0.91 0.21 0.21 192 194 196 198 200 202 204 206 208 KHz

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