1. For the baseband signal given m(t) = 2sin 2000rt,and the carrier given by 4cos 10000nt,Find the expression and sketch the time domainmodulated signal if the type of modulation performedis:(a) Double side band with Carrier,(b) DSB-SC amplitude modulation.2. For the given message signal m(t) = cos1000zt,a) Sketch the spectrum of m(t)b) Find and sketch the frequency domain DSB-SCsignal m(t)cos(10000nt).c) Identify the upper sideband (USB) and the lowersideband (LSB) spectra.d) Verify that the DSB-SC modulated signal can bedemodulated by the demodulator given below:m(t)cos(10000zt)Low-passTillercos1000t3. A modulating signal m(t) is given by:m(t) = cos400nt cos700rtDetermine the time domain expressions qusB(t) andPLSB(t) if the carrier frequency o, =2000.Hint: If m(t) is a sinusoid, its Hilbert transform m,(t)is the sinusoid m(t) phase delayed by n/2 radians.

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Answered: 1. For the baseband signal given m(t) =…

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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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).
zain IQ AM Modulatio... -> AM Modulation 1. What is the main feature in AM modulation, that is used to judge if the modulation is good or not? Explain with examples. 2. Can AM modulated signal change phase and/or frequency? Explain the reason. 3. What is modulation index? Its formula? 4. Plot an AM modulated signal, that has an information signal m(t) = 10 sin(10nt) and a carrier signal c(t) = 15 cos(1000t). Calculate the modulation index (u). Is it a good modulation? If no, suggest a change in one of the signals above and calculate u again, so that it approaches ideal case. 5. Draw the modulation block diagram of AM. ...
Pr. 3] A 107.6MHz carrier signal is frequency modulated by a 7KHz sine wave. The resultant FM signal has a deviation of 50KHz. Determine the following: (a) The carrier swing of FM signal (b) Highest and lowest frequency attained by the modulated signal. Modulation Index of FM wave.
- An AM signal has a carrier of 10MHz and modulating signal of 10kHz. It has a modulation index of 0.7. Write its expression an calculate power efficiency?
Problem 2: Based on the figure below, which represents the spectrum of a DSB-LC signal, find the following. 2n -1200 -1100 -1000 -900 -800 800 900 1000 1100 1200 (d) Calculate the average power for both the carrier (P) and side bands (P,). (e) Find the modulation efficiency (µ)
1. a. For a baseband signal m(t) = cos wmt = cos 2n fmt, Find the DSB-SC signal and sketch its spectrum. Identify the USB and LSB. b. For each of the baseband signal: (i) sketch the spectrum m(t). (ii) sketch the spectrum of the DSB-SC signal m(t)cos 10,000rnt, (ii) Identify the USB and LSB. (i) т() = cos 1000xt; (ii) m(t) (iii) m(t) = cos 10007I cos 30007 {, с. You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos (wei+0), where m(t) is a signal band-limited to B Hz. Figure P4.2-4 shows a DSB-SC modulator available in the stock room. The carrier generator avaitable generates not cos wet, but cos³ wct. Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. (a) What kind of filter is required in Fig. P4.2-3? (b) Determine the signal spectra at points b and c, and indicate the frequency bands occupied by these spectra. km(1) cos at MS) Filter cos ca (a)
5-If the FM modulating signal is 300 kHz, and the carrier swing is 300 kHz. Therefore, the value and the type of the modulation index are, a) 0.5 NBFM b) 0.5 WBFM c) 1 NBFM d) 1 WBFM 6- IF the modulation index of FM signal is 2, the number of significant sidebands which greater than 1% of unmodulated carrier is? (Follow the table in the last page) a) 4 sidebands b) 6 sidebands c) 8 sidebands d) 10 sidebands 7- Let the carrier given 10cos(2nd) and the message signal be 5cos(10mt). Assume the message is used to frequency modulate the carrier with ky-10, the modulation index is, a) 1 b) 5 c) 10 d) 15
A carrier of frequency 900kHz is being Amplitude Modulated (AM) by a modulating signal that is a sine wave at a constant frequency of 4kHz and constant amplitude. The modulation index is less than 100%. Determine the frequency of the upper sideband and lower sideband and total bandwidth of the resultant Amplitude Modulated waveform.
1. The evaluation of 8(t - 1)8(t - 2)dt is 2. A sinusoidal modulated signal has its Atmax =50 and the minimum is half of it, so the efficiency of modulation will be.. .........
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?
Please explain the waveforms, what are the reason why does the 3rd waveform (Recovered signal) is attenuated. 1st waveform: Carrier signal (2Vpk,20 kHz) 2nd waveform: Information signal (1Vpk,1kHz) 3rd waveform: Recovered signal
a) i) Consider the AM signal s(t) = 10cos(3900tt) + 40cos(4000rt) + 10cos(4100Trt). Calculate the modulating frequency and the modulation index. %3D ii) A single sideband AM signal (SSB-SC) is given by s(t) = 10cos(11000 Trt). The carrier signal is c(t) = 4cos(1000OTt). Determine the modulating signal m(t). iii) The efficiency µ of an AM signal is defined as the percentage of the total power carried by the sidebands, that is PSDBS × 100% Ps u = where PSDBS is the power carried by the sidebands and P, is the total power of the AM signal. (a) Find u for when the AM modulation index is m 33.3%. 0.5. (b) Show that µmax is

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