www 1. Since m(t) = 2 cos(100лt) + 4 cos(200πt), ma = 0.9 and c(t) = 10cos(20000ft), find the spectrum and bandwidth of the ordinary amplitude modulated signal. wwwmmmm wwwww 2. It is desired to obtain the SSB signal by applying the filter method in single sideband modulation. The baseband beacon is band limited between 1 kHz and 2 kHz and the beacon will be transmitted at 7 MHz. Explain the generation of the output signal using the necessary steps, using the necessary calculations and drawing the spectra. wwwwwww mmm 3. Let SFM (t) = 50cos(40000t + (t)) FM sign. If the frequency sensitivity is kf=8 and the message sign is m(t)=20cos(640πt), find the required transmission bandwidth of the FM signal. Obtain the SFM(f) sign and draw its spectrum. Bessel Fonksiyonu Değerleri J.(x) 0.5 1 2 0.9385 0.7652 0.2239 0.2423 0.4401 0.5767 0.0306 0.1149 0.3528 0.0026 0.0196 0.1289 0.0002 0.0025 0.0340 0.0002 0.0070 0.0012 0.0002 in - В 0.1 0.3 0.5 1.0 2.0 2n max 2 4 468

www 1. Since m(t) = 2 cos(100лt) + 4 cos(200πt), ma = 0.9 and c(t) = 10cos(20000ft), find the spectrum and bandwidth of the ordinary amplitude modulated signal. wwwmmmm wwwww 2. It is desired to obtain the SSB signal by applying the filter method in single sideband modulation. The baseband beacon is band limited between 1 kHz and 2 kHz and the beacon will be transmitted at 7 MHz. Explain the generation of the output signal using the necessary steps, using the necessary calculations and drawing the spectra. wwwwwww mmm 3. Let SFM (t) = 50cos(40000t + (t)) FM sign. If the frequency sensitivity is kf=8 and the message sign is m(t)=20cos(640πt), find the required transmission bandwidth of the FM signal. Obtain the SFM(f) sign and draw its spectrum. Bessel Fonksiyonu Değerleri J.(x) 0.5 1 2 0.9385 0.7652 0.2239 0.2423 0.4401 0.5767 0.0306 0.1149 0.3528 0.0026 0.0196 0.1289 0.0002 0.0025 0.0340 0.0002 0.0070 0.0012 0.0002 in - В 0.1 0.3 0.5 1.0 2.0 2n max 2 4 468

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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Question 6 SPM(t) and Sy(t) as defined below, are the phase modulated and the frequency modulated waveforms, respectively, corresponding to the message signal m(t) shown in the figure. SPMt) = cos(1000nt + K, m(t)) and SEMI) = cos 1000rt + K m(t) dt %3D -0- where K, is the phase deviation constant in radians/volt and K, is the frequency deviation constant in radians/second/volt. If the highest instantaneous frequencies of SPM(t) and Kp is SEM1) are same, then the value of the ratio seconds. AV in m(t) 10 1 3 6 7 t (sec)
Type your question here A DSB/ SC and an SSB/ SC transmissions are ach sent at 1 MHz in presence of noise. The modulating signal in each case is band- limited to 3 kHz. The received signal power in each case is 1 mw and the received noise is assumed to white with a (two - sided) power spectral density of 10-3 uw/Hz. The receiver consists of a bandpass filter (BPF) whose bandwidth matches synchronous detector. a- Compare the SNR, at detector input. b- Compare the SNR, at detector output.
Q3. An AM (DSB) signal is given by x(t) = 20(1 + 0.5 cos(4000nt) + 0.5 cos(6000nt)) cos(20000nt). a) Sketch the frequency spectrum of x.(t). b) Find the average power content of each spectral component. c) Calculate the modulation index. d) Design a demodulator using block diagram and indicate the outputs of each block. e) Propose a method to reduce transmission bandwidth of the system.
-The modulating signal 2cos (2 π×103 t) is used to modulate a carrier signal 40cos (2 π×104t). Evaluate the modulation index, percentage modulation, frequency of side band components and their amplitudes .What is the bandwidth of a modulating signal.
BEI wenty speech signal each bandlimited to 4 kHz are FDM/SSB multiplexed, then RF modulated by a main carrier using AM modulator. Draw the block diagram and find the minimum bandwidth of multiplexing and final transmission bandwidth. A- Plot the amplitude and phase spectrum for the f(t) = 4cos(nft +30°) + 2 sin(aft)
A sequence of alternating 1s and 0s is transmitted as a square wave. What is the fundamentalfrequency and how many harmonics can be used if the available BW is 100 MHz and a data rate of 56Mbps is desired? Express the signal as a mathematical function of time (s(t)) and sketch the resultingsignal in both the time and frequency domains. Is this a “good enough” representation of the squarewave? Why or why not?
Which of the following statement/statements about amplitude modulation is/are true? A The total power (Pt) in an AM signal is expressed as (P B C D P₁ = Pc+ ma 2 The modulation index is given as Ac Am When more than one sinusoids with different amplitudes are used to amplitude modulate a carrier, the overall modulation index for AM is- m₁ = √ (m², + m² ₂ + m² 3 + ...) 1 When ma = 1, only of the total power is in the sidebands and 3 2 remaining is in the carrier. 3 Submit
Q6: An AM modulation waveform signal: p(t) = (1+ 0.5 cos 2000nt + 0.5 cos 4000rt) cos 20000nt (a) Sketch the amplitude spectrum of ø(t). (b)Find total power, sideband power and power efficiency. (c) Find the average power containing of each sideband.
An FM signal has a deviation of 3 kHz and a modulating frequency of 1 kHz. Its total power is 5 W, developed across a 50 2 resistive load. The carrier fre- quency is 160 MHz. (a) Calculate the RMS signal voltage. (b) Calculate the RMS voltage at the carrier frequency and each of the first three sets of sidebands. (c) Calculate the frequency of each sideband for the first three sideband pairs. es Falerna avlop (d) Calculate the power at the carrier frequency, and in each sideband, for the first three pairs.
Plot an AM modulated signal , that has an information signal m ( t ) = 10 sin ( 10nt ) and a carrier signal c ( t ) = 15 cos ( 1000nt ) . 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
3. The modulating and carrier signals of an AM wave are defined as Vm (t) = 2cos2m (100 t), Vc (t) = 4 cos2n (1000) t What are the frequency components are available in the AM wave? Also calculate the modulation index and transmission bandwidth.